Liberty Property Trust (LPT) 10-K 26 Feb 16 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information Document - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2015	Feb. 23, 2016	Jun. 30, 2015
Document Information [Line Items]
Entity Registrant Name	LIBERTY PROPERTY TRUST
Entity Central Index Key	921,112
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		146,212,454
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 4.7
Liberty Property Limited Partnership [Member]
Document Information [Line Items]
Entity Registrant Name	LIBERTY PROPERTY LIMITED PARTNERSHIP
Entity Central Index Key	921,113

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
ASSETS
Land and land improvements	$ 1,184,927	$ 1,188,774
Building and improvements	5,131,648	5,339,314
Less accumulated depreciation	(1,148,928)	(1,182,129)
Operating real estate	5,167,647	5,345,959
Development in progress	360,948	277,411
Land held for development	336,967	269,059
Net real estate	5,865,562	5,892,429
Cash and cash equivalents	35,353	69,346
Restricted cash	9,018	20,325
Accounts receivable, net	14,343	15,481
Deferred rent receivable, net	118,787	107,909
Deferred financing and leasing costs, net	192,109	192,764
Investments in and advances to unconsolidated joint ventures	218,454	208,832
Assets held for sale	4,954	13,529
Prepaid expenses and other assets	99,049	91,399
Total assets	6,557,629	6,612,014
LIABILITIES
Mortgage loans, net	307,908	484,852
Unsecured notes, net	2,580,108	2,498,021
Credit facility	259,000	167,000
Accounts payable	51,382	52,043
Accrued interest	26,154	24,513
Dividend and distributions payable	71,787	72,253
Other liabilities	243,806	219,418
Total liabilities	3,540,145	3,518,100
Noncontrolling interest - operating partnership - 301,483 preferred units outstanding as of December 31, 2015 and December 31, 2014	7,537	7,537
EQUITY
Common shares of beneficial interest, $.001 par value, 283,987,000 shares authorized; 147,577,984 and 148,557,270 shares issued and outstanding as of December 31, 2015 and December 31, 2014, respectively	148	149
Additional paid-in capital	3,669,627	3,688,644
Accumulated other comprehensive loss	(17,893)	(6,252)
Distributions in excess of net income	(698,954)	(654,869)
Total Liberty Property Trust shareholders' equity	2,952,928	3,027,672
Noncontrolling interest - operating partnership
Noncontrolling interest - operating partnerships	53,100	54,786
Noncontrolling interest - consolidated joint ventures	3,919	3,919
Total equity	3,009,947	3,086,377
Total liabilities, noncontrolling interest - operating partnership and equity	6,557,629	6,612,014
Liberty Property Limited Partnership [Member]
ASSETS
Land and land improvements	1,184,927	1,188,774
Building and improvements	5,131,648	5,339,314
Less accumulated depreciation	(1,148,928)	(1,182,129)
Operating real estate	5,167,647	5,345,959
Development in progress	360,948	277,411
Land held for development	336,967	269,059
Net real estate	5,865,562	5,892,429
Cash and cash equivalents	35,353	69,346
Restricted cash	9,018	20,325
Accounts receivable, net	14,343	15,481
Deferred rent receivable, net	118,787	107,909
Deferred financing and leasing costs, net	192,109	192,764
Investments in and advances to unconsolidated joint ventures	218,454	208,832
Assets held for sale	4,954	13,529
Prepaid expenses and other assets	99,049	91,399
Total assets	6,557,629	6,612,014
LIABILITIES
Mortgage loans, net	307,908	484,852
Unsecured notes, net	2,580,108	2,498,021
Credit facility	259,000	167,000
Accounts payable	51,382	52,043
Accrued interest	26,154	24,513
Dividend and distributions payable	71,787	72,253
Other liabilities	243,806	219,418
Total liabilities	3,540,145	3,518,100
Noncontrolling interest - operating partnership - 301,483 preferred units outstanding as of December 31, 2015 and December 31, 2014	7,537	7,537
EQUITY
General partner’s equity	2,952,928	3,027,672
Limited partners’ equity	53,100	54,786
Noncontrolling interest - operating partnership
Noncontrolling interest - consolidated joint ventures	3,919	3,919
Total equity	3,009,947	3,086,377
Total liabilities, noncontrolling interest - operating partnership and equity	$ 6,557,629	$ 6,612,014

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
OPERATING REVENUE
Rental	$ 584,165	$ 568,346	$ 458,081
Operating expense reimbursement	224,608	224,285	187,849
Operating revenue	808,773	792,631	645,930
OPERATING EXPENSE
Rental property	132,702	138,124	114,617
Real estate taxes	105,410	101,814	79,918
General and administrative	68,710	63,327	74,564
Depreciation and amortization	226,575	231,943	173,784
Impairment - real estate assets	18,244	117	248
Total operating expenses	551,641	535,325	443,131
Operating income	257,132	257,306	202,799
OTHER INCOME (EXPENSE)
Interest and other income	22,863	17,669	18,803
Interest expense	(135,779)	(151,887)	(127,115)
Total other income (expense)	(112,916)	(134,218)	(108,312)
Income before gain on property dispositions, income taxes and equity in earnings of unconsolidated joint ventures	144,216	123,088	94,487
Gain on property dispositions	100,314	45,147	0
Income taxes	(3,233)	(2,967)	(2,799)
Equity in earnings of unconsolidated joint ventures	3,149	10,314	6,067
Income from continuing operations	244,446	175,582	97,755
Discontinued operations (including net gain on property dispositions of $46,631 and $95,384 for the years ended December 31, 2014 and 2013, respectively)	0	48,581	121,839
Net income	244,446	224,163	219,594
Noncontrolling interest - operating partnership	(6,158)	(5,706)	(9,203)
Noncontrolling interest - consolidated joint ventures	(249)	(547)	(653)
Excess of preferred unit redemption over carrying amount			(1,236)
Net income available to common shareholders	238,039	217,910	209,738
Comprehensive income attributable to common shareholders
Net income	244,446	224,163	219,594
Other comprehensive (loss) income - foreign currency translation	(11,433)	(14,415)	5,397
Other comprehensive (loss) income - derivative instruments	(488)	(1,961)	1,584
Other comprehensive (loss) income	(11,921)	(16,376)	6,981
Total comprehensive income	232,525	207,787	226,575
Less: comprehensive income attributable to noncontrolling interest	(6,127)	(5,870)	(9,995)
Comprehensive income attributable to common shareholders	$ 226,398	$ 201,917	$ 216,580
Weighted average number of common shares outstanding
Basic	148,243	147,216	130,180
Diluted	148,843	147,886	130,909
Amounts attributable to common shareholders
Income from continuing operations	$ 238,039	$ 170,471	$ 91,274
Discontinued operations	0	47,439	118,464
Net income available to common shareholders	238,039	217,910	209,738
Liberty Property Limited Partnership [Member]
OPERATING REVENUE
Rental	584,165	568,346	458,081
Operating expense reimbursement	224,608	224,285	187,849
Operating revenue	808,773	792,631	645,930
OPERATING EXPENSE
Rental property	132,702	138,124	114,617
Real estate taxes	105,410	101,814	79,918
General and administrative	68,710	63,327	74,564
Depreciation and amortization	226,575	231,943	173,784
Impairment - real estate assets	18,244	117	248
Total operating expenses	551,641	535,325	443,131
Operating income	257,132	257,306	202,799
OTHER INCOME (EXPENSE)
Interest and other income	22,863	17,669	18,803
Interest expense	(135,779)	(151,887)	(127,115)
Total other income (expense)	(112,916)	(134,218)	(108,312)
Income before gain on property dispositions, income taxes and equity in earnings of unconsolidated joint ventures	144,216	123,088	94,487
Gain on property dispositions	100,314	45,147	0
Income taxes	(3,233)	(2,967)	(2,799)
Equity in earnings of unconsolidated joint ventures	3,149	10,314	6,067
Income from continuing operations	244,446	175,582	97,755
Discontinued operations (including net gain on property dispositions of $46,631 and $95,384 for the years ended December 31, 2014 and 2013, respectively)	0	48,581	121,839
Net income	244,446	224,163	219,594
Noncontrolling interest - consolidated joint ventures	(249)	(547)	(653)
Preferred unit distributions	(472)	(472)	(2,119)
Excess of preferred unit redemption over carrying amount	0	0	(1,236)
Net income available to common shareholders	243,725	223,144	215,586
Comprehensive income attributable to common shareholders
Net income	244,446	224,163	219,594
Other comprehensive (loss) income - foreign currency translation	(11,433)	(14,415)	5,397
Other comprehensive (loss) income - derivative instruments	(488)	(1,961)	1,584
Other comprehensive (loss) income	(11,921)	(16,376)	6,981
Total comprehensive income	$ 232,525	$ 207,787	$ 226,575
Weighted average number of common shares outstanding
Basic	151,783	150,770	133,858
Diluted	152,383	151,440	134,587
Net Income Allocated to General Partners	$ 238,039	$ 217,910	$ 209,738
Net Income Allocated to Limited Partners	6,158	5,706	9,203
Amounts attributable to common shareholders
Income from continuing operations	244,197	175,035	97,102
Net income available to common shareholders	$ 243,725	$ 223,144	$ 215,586
Common shares [Member]
Basic:
Income from continuing operations	$ 1.61	$ 1.16	$ 0.70
Income from discontinued operations	0	0.32	0.91
Income per common share - basic	1.61	1.48	1.61
Diluted:
Income from continuing operations	1.60	1.15	0.70
Income from discontinued operations	0	0.32	0.90
Income per common share - diluted	1.60	1.47	1.60
Common units [Member] | Liberty Property Limited Partnership [Member]
Basic:
Income from continuing operations	1.61	1.16	0.70
Income from discontinued operations	0	0.32	0.91
Income per common share - basic	1.61	1.48	1.61
Diluted:
Income from continuing operations	1.60	1.15	0.70
Income from discontinued operations	0	0.32	0.90
Income per common share - diluted	$ 1.60	$ 1.47	$ 1.60

Consolidated Statement of Equit

Consolidated Statement of Equity - USD ($) $ in Thousands	Total	Common Shares Of Beneficial Interest [Member]		Additional Paid-In Capital [Member]		Accumulated Other Comprehensive Income [Member]	Distributions in Excess of Net Income [Member]	Total Liberty Property Trust Shareholders' Equity [Member]	Noncontrolling interest operating partnership Common [Member]	Noncontrolling interest operating partnership-Preferred [Member]	Noncontrolling interest-consolidated joint ventures [Member]	Stockholders' Equity, Total [Member]	Liberty Property Limited Partnership [Member]	Liberty Property Limited Partnership [Member]General Partner [Member]	Liberty Property Limited Partnership [Member]Limited Partner [Member]	Liberty Property Limited Partnership [Member]Noncontrolling interest operating partnership-Preferred [Member]	Liberty Property Limited Partnership [Member]Noncontrolling interest-consolidated joint ventures [Member]	Liberty Property Limited Partnership [Member]Stockholders' Equity, Total [Member]	Common shares [Member]	Common shares [Member]Common Shares Of Beneficial Interest [Member]	Common shares [Member]Additional Paid-In Capital [Member]	Common units [Member]Liberty Property Limited Partnership [Member]General Partner [Member]	Common units [Member]Liberty Property Limited Partnership [Member]Limited Partner [Member]
Common shares outstanding - Beginning Balance (Restatement Adjustment [Member])																			1,249,909
Common shares outstanding - Beginning Balance at Dec. 31, 2012	118,470,867																		118,470,867
General Partner's units outstanding - Beginning Balance at Dec. 31, 2012																						118,470,867
Limited Partners' units outstanding - Beginning Balance at Dec. 31, 2012																							3,713,851
Increase (Decrease) in Shares/Units [Roll Forward]
Number of common shares issued																			27,968,740
Number of common units issued																						27,968,740
Share repurchase, shares																			0
Increase in shares of the Trust/units of general partner from the conversion of limited partners' units																			157,285			157,285
Decrease in limited partners' units from conversion into shares																							(157,285)
Common shares outstanding - Ending Balance at Dec. 31, 2013	146,596,892																		146,596,892
General Partner's units outstanding - Ending Balance at Dec. 31, 2013																						146,596,892
Limited Partners' units outstanding - Ending Balance at Dec. 31, 2013																							3,556,566
Beginning Balance (Restatement Adjustment [Member])																				$ 1	$ 51,950
Beginning Balance at Dec. 31, 2012		$ 118	[1]	$ 2,635,751	[1]	$ 2,900	$ (547,757)	$ 2,091,012	$ 60,223	$ 63,264	$ 3,321	$ 2,217,820		$ 2,091,012	$ 60,223	$ 63,264	$ 3,321	$ 2,217,820
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net proceeds from the issuance of common shares		29		969,439		0	0	969,468	0	0	0	969,468
Contributions from partners														979,444				979,444
Distributions to partners														(253,694)	(6,995)	(1,647)	(352)	(262,688)
Net income	$ 219,594	0		0		0	209,738	209,738	5,848	2,883	653	219,122	$ 219,594	209,738	5,848	2,883	653	219,122
Distributions		0		0		0	(253,694)	(253,694)	(6,995)	(1,647)	(352)	(262,688)
Redemption of limited partners common units for common shares														2,502	(2,502)
Noncash compensation		0		9,976		0	0	9,976	0	0	0	9,976
Other comprehensive (loss) income - foreign currency translation	5,397	0		0		5,296	0	5,296	101	0	0	5,397	5,397	5,296	101			5,397
Other comprehensive (loss) income - derivative instruments	1,584	0		0		1,546	0	1,546	38	0	0	1,584	1,584	1,546	38	0	0	1,584
Redemption of noncontrolling interests - common units		0		2,502		0	0	2,502	(2,502)	0	0	0
Redemption of limited partners' preferred units		0		0		0	0	0	0	(63,264)	0	(63,264)				(63,264)		(63,264)
Excess of preferred unit redemption over carrying amount	(1,236)	0		0		0	0	0	0	(1,236)	0	(1,236)	(1,236)			(1,236)		(1,236)
Ending Balance at Dec. 31, 2013		147		3,617,668		9,742	(591,713)	3,035,844	56,713	0	3,622	3,096,179		3,035,844	56,713	0	3,622	3,096,179
Noncontrolling interest - operating partnership (mezzanine) - Beginning of Period at Dec. 31, 2012	7,537												7,537
Increase (Decrease) in Temporary Equity [Roll Forward]
Temporary Equity, Net Income	472												472
Temporary Equity, Distributions	(472)												(472)
Noncontrolling interest - operating partnership (mezzanine) - End of Period at Dec. 31, 2013	$ 7,537												$ 7,537
Increase (Decrease) in Shares/Units [Roll Forward]
Number of common shares issued																			1,957,378
Number of common units issued																						1,957,378
Share repurchase, shares																			0
Increase in shares of the Trust/units of general partner from the conversion of limited partners' units																			3,000			3,000
Decrease in limited partners' units from conversion into shares																							(3,000)
Common shares outstanding - Ending Balance at Dec. 31, 2014	148,557,270												148,557,270						148,557,270
General Partner's units outstanding - Ending Balance at Dec. 31, 2014																						148,557,270
Limited Partners' units outstanding - Ending Balance at Dec. 31, 2014													3,556,566										3,553,566
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net proceeds from the issuance of common shares		2		58,471		0	0	58,473	0	0	0	58,473
Contributions from partners														70,930				70,930
Distributions to partners														(281,066)	(6,731)	0	(250)	(288,047)
Net income	$ 224,163	0		0		0	217,910	217,910	5,234	0	547	223,691	$ 224,163	217,910	5,234	0	547	223,691
Distributions		0		0		0	(281,066)	(281,066)	(6,731)	0	(250)	(288,047)
Redemption of limited partners common units for common shares														48	(48)
Noncash compensation		0		12,457		0	0	12,457	0	0	0	12,457
Other comprehensive (loss) income - foreign currency translation	(14,415)	0		0		(14,079)	0	(14,079)	(336)	0	0	(14,415)	(14,415)	(14,079)	(336)			(14,415)
Other comprehensive (loss) income - derivative instruments	(1,961)	0		0		(1,915)	0	(1,915)	(46)	0	0	(1,961)	(1,961)	(1,915)	(46)	0	0	(1,961)
Redemption of noncontrolling interests - common units		0		48		0	0	48	(48)	0	0	0
Excess of preferred unit redemption over carrying amount													0
Ending Balance at Dec. 31, 2014	3,086,377	149		3,688,644		(6,252)	(654,869)	3,027,672	54,786	0	3,919	3,086,377	3,086,377	3,027,672	54,786	0	3,919	3,086,377
Increase (Decrease) in Temporary Equity [Roll Forward]
Temporary Equity, Net Income	472												472
Temporary Equity, Distributions	(472)												(472)
Noncontrolling interest - operating partnership (mezzanine) - End of Period at Dec. 31, 2014	$ 7,537												$ 7,537
Increase (Decrease) in Shares/Units [Roll Forward]
Number of common shares issued																			1,328,017
Number of common units issued																						1,328,017
Share repurchase, shares																			(2,321,794)			(2,321,794)
Increase in shares of the Trust/units of general partner from the conversion of limited partners' units																			14,491			14,491
Decrease in limited partners' units from conversion into shares																							(14,491)
Common shares outstanding - Ending Balance at Dec. 31, 2015	147,577,984												147,577,984						147,577,984
General Partner's units outstanding - Ending Balance at Dec. 31, 2015																						147,577,984
Limited Partners' units outstanding - Ending Balance at Dec. 31, 2015													3,539,075										3,539,075
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net proceeds from the issuance of common shares		0		38,797		0	0	38,797	0	0	0	38,797
Contributions from partners														52,560				52,560
Distributions to partners														(282,124)	(6,868)	0	(249)	(289,241)
Net income	$ 244,446	0		0		0	238,039	238,039	5,686	0	249	243,974	$ 244,446	238,039	5,686	0	249	243,974
Distributions		0		0		0	(282,124)	(282,124)	(6,868)	0	(249)	(289,241)
Share repurchase, value		(1)		(71,801)		0	0	(71,802)	0	0	0	(71,802)		(71,802)	0	0	0	(71,802)
Redemption of limited partners common units for common shares														224	(224)			0
Noncash compensation		0		13,763		0	0	13,763	0	0	0	13,763
Other comprehensive (loss) income - foreign currency translation	(11,433)	0		0		(11,164)	0	(11,164)	(269)	0	0	(11,433)	(11,433)	(11,164)	(269)			(11,433)
Other comprehensive (loss) income - derivative instruments	(488)	0		0		(477)	0	(477)	(11)	0	0	(488)	(488)	(477)	(11)	0	0	(488)
Redemption of noncontrolling interests - common units		0		224		0	0	224	(224)	0	0	0
Excess of preferred unit redemption over carrying amount													0
Ending Balance at Dec. 31, 2015	3,009,947	$ 148		$ 3,669,627		$ (17,893)	$ (698,954)	$ 2,952,928	$ 53,100	$ 0	$ 3,919	$ 3,009,947	3,009,947	$ 2,952,928	$ 53,100	$ 0	$ 3,919	$ 3,009,947
Increase (Decrease) in Temporary Equity [Roll Forward]
Temporary Equity, Net Income	472												472
Temporary Equity, Distributions	(472)												(472)
Noncontrolling interest - operating partnership (mezzanine) - End of Period at Dec. 31, 2015	$ 7,537												$ 7,537
[1]	The January 1, 2013 balance of common shares of beneficial interest and additional paid-in capital have been reduced by $1 and $51,950, respectively, from previous filings. The January 1, 2013 balance of number of common shares has been reduced by 1,249,909 from previous filings. See Note 2.

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
OPERATING ACTIVITIES
Net income	$ 244,446	$ 224,163	$ 219,594
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	229,779	236,075	205,147
Amortization of deferred financing costs	4,395	4,811	4,084
Impairment - real estate assets	18,244	117	248
Equity in earnings of unconsolidated joint ventures	(3,149)	(10,314)	(6,067)
Distributions from unconsolidated joint ventures	2,444	0	844
Gain on property dispositions	(100,314)	(91,778)	(98,651)
Share-based and Noncash compensation	12,919	12,457	9,976
Other	(9,937)	(7,935)	(8,311)
Changes in operating assets and liabilities:
Restricted cash	10,478	30,286	(18,397)
Accounts receivable	1,009	(1,770)	(4,889)
Deferred rent receivable	(23,167)	(15,263)	(9,473)
Prepaid expenses and other assets	(14,540)	(28,360)	(22,424)
Accounts payable	1,822	5,299	15,703
Accrued interest	1,641	(1,264)	5,613
Other liabilities	9,296	(20,040)	22,968
Net cash provided by operating activities	385,366	336,484	315,965
INVESTING ACTIVITIES
Investment in properties - acquisitions	(111,811)	(124,962)	(1,429,822)
Investment in properties - other	(77,626)	(102,466)	(74,345)
Investments in and advances to unconsolidated joint ventures	(43,676)	(22,243)	(16,185)
Distributions from unconsolidated joint ventures	33,195	15,330	13,774
Net proceeds from disposition of properties/land	530,440	559,322	526,949
Investment in development in progress	(210,677)	(288,375)	(123,879)
Investment in land held for development	(150,523)	(105,324)	(67,326)
Investment in deferred leasing costs	(48,672)	(40,123)	(36,901)
Other investing activities	(10,310)	2,504	9,821
Net cash used in investing activities	(89,660)	(106,337)	(1,197,914)
FINANCING ACTIVITIES
Net proceeds from issuance of Common Shares	38,797	58,473	969,468
Share repurchase	(71,802)	0	0
Redemption of preferred units	0	0	(64,500)
Proceeds from unsecured notes	398,576	0	448,646
Repayments of unsecured notes	(316,000)	(200,000)	0
Proceeds from mortgage loans	0	0	10,401
Repayments of mortgage loans	(175,364)	(56,156)	(10,605)
Proceeds from credit facility	1,122,700	517,550	611,550
Repayments on credit facility	(1,030,700)	(350,550)	(703,550)
Payment of deferred financing costs	(3,656)	(3,629)	(5,866)
Distribution paid on Common Shares	(282,582)	(280,136)	(240,340)
Distribution paid on units	(7,596)	(7,453)	(9,438)
Net cash (used in) provided by financing activities	(327,627)	(321,901)	1,005,766
Net (decrease) increase in cash and cash equivalents	(31,921)	(91,754)	123,817
(Decrease) increase in cash and cash equivalents related to foreign currency translation	(2,072)	(2,314)	1,241
Cash and cash equivalents at beginning of year	69,346	163,414	38,356
Cash and cash equivalents at end of year	35,353	69,346	163,414
Liberty Property Limited Partnership [Member]
OPERATING ACTIVITIES
Net income	244,446	224,163	219,594
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	229,779	236,075	205,147
Amortization of deferred financing costs	4,395	4,811	4,084
Impairment - real estate assets	18,244	117	248
Equity in earnings of unconsolidated joint ventures	(3,149)	(10,314)	(6,067)
Distributions from unconsolidated joint ventures	2,444	0	844
Gain on property dispositions	(100,314)	(91,778)	(98,651)
Share-based and Noncash compensation	12,919	12,457	9,976
Other	(9,937)	(7,935)	(8,311)
Changes in operating assets and liabilities:
Restricted cash	10,478	30,286	(18,397)
Accounts receivable	1,009	(1,770)	(4,889)
Deferred rent receivable	(23,167)	(15,263)	(9,473)
Prepaid expenses and other assets	(14,540)	(28,360)	(22,424)
Accounts payable	1,822	5,299	15,703
Accrued interest	1,641	(1,264)	5,613
Other liabilities	9,296	(20,040)	22,968
Net cash provided by operating activities	385,366	336,484	315,965
INVESTING ACTIVITIES
Investment in properties - acquisitions	(111,811)	(124,962)	(1,429,822)
Investment in properties - other	(77,626)	(102,466)	(74,345)
Investments in and advances to unconsolidated joint ventures	(43,676)	(22,243)	(16,185)
Distributions from unconsolidated joint ventures	33,195	15,330	13,774
Net proceeds from disposition of properties/land	530,440	559,322	526,949
Investment in development in progress	(210,677)	(288,375)	(123,879)
Investment in land held for development	(150,523)	(105,324)	(67,326)
Investment in deferred leasing costs	(48,672)	(40,123)	(36,901)
Other investing activities	(10,310)	2,504	9,821
Net cash used in investing activities	(89,660)	(106,337)	(1,197,914)
FINANCING ACTIVITIES
Redemption of preferred units	0	0	(64,500)
Proceeds from unsecured notes	398,576	0	448,646
Repayments of unsecured notes	(316,000)	(200,000)	0
Proceeds from mortgage loans	0	0	10,401
Repayments of mortgage loans	(175,364)	(56,156)	(10,605)
Proceeds from credit facility	1,122,700	517,550	611,550
Repayments on credit facility	(1,030,700)	(350,550)	(703,550)
Payment of deferred financing costs	(3,656)	(3,629)	(5,866)
Capital contributions	38,797	58,473	969,468
Distributions to partners	(361,980)	(287,589)	(249,778)
Net cash (used in) provided by financing activities	(327,627)	(321,901)	1,005,766
Net (decrease) increase in cash and cash equivalents	(31,921)	(91,754)	123,817
(Decrease) increase in cash and cash equivalents related to foreign currency translation	(2,072)	(2,314)	1,241
Cash and cash equivalents at beginning of year	69,346	163,414	38,356
Cash and cash equivalents at end of year	$ 35,353	$ 69,346	$ 163,414

Balance Sheet Parenthetical (Pa

Balance Sheet Parenthetical (Parentheticals) - $ / shares	Dec. 31, 2015	Dec. 31, 2014
Par value	$ 0.001	$ 0.001
Common shares authorized	283,987,000	283,987,000
Common shares issued	147,577,984	148,557,270
Common shares outstanding	147,577,984	148,557,270
Redeemable Preferred Stock [Member]
Redeemable stock, preferred units outstanding	301,483	301,483
Liberty Property Limited Partnership [Member]
Common shares outstanding	147,577,984	148,557,270
Common units outstanding	3,539,075	3,556,566
Liberty Property Limited Partnership [Member] | Redeemable Preferred Stock [Member]
Redeemable stock, preferred units outstanding	301,483	301,483

Income Statement Parenthetical

Income Statement Parenthetical (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Discontinued operations, net gain on property dispositions	$ 0	$ 46,631	$ 95,384
Liberty Property Limited Partnership [Member]
Discontinued operations, net gain on property dispositions	$ 0	$ 46,631	$ 95,384

Organization and Basis of Prese

Organization and Basis of Presentation	12 Months Ended
	Dec. 31, 2015
Organization and Basis of Presentation [Abstract]
Organization and Basis of Presentation	ORGANIZATION Liberty Property Trust (the “Trust”) is a self-administered and self-managed Maryland real estate investment trust (a “REIT”). Substantially all of the Trust’s assets are owned directly or indirectly, and substantially all of the Trust’s operations are conducted directly or indirectly, by its subsidiary, Liberty Property Limited Partnership, a Pennsylvania limited partnership (the “Operating Partnership” and, together with the Trust and their consolidated subsidiaries, the “Company”). The Trust is the sole general partner and also a limited partner of the Operating Partnership, owning 97.7% of the common equity of the Operating Partnership at December 31, 2015 . The Company owns and operates industrial properties nationally and owns and operates office properties in a focused group of office markets. Additionally, the Company owns certain assets in the United Kingdom. Unless otherwise indicated, the notes to the Consolidated Financial Statements apply to both the Trust and the Operating Partnership. The terms the "Company,” “we,” “our” and “us” means the Trust and Operating Partnership collectively. All square footage amounts are unaudited.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Use of Estimates The preparation of financial statements in conformity with U.S. generally accepted accounting principles ("US GAAP") requires management to make estimates and assumptions that affect amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. Principles of Consolidation The consolidated financial statements of the Company include the Trust, the Operating Partnership, wholly owned subsidiaries and those subsidiaries in which the Company owns a majority voting interest with the ability to control operations of the subsidiaries and where no approval, veto or other important rights have been granted to the noncontrolling shareholders. The Company consolidates joint ventures that are considered to be variable interest entities (“VIEs”) where we are the primary beneficiary. The Company (i) evaluates the sufficiency of the total equity investment at risk, (ii) reviews the voting rights and decision-making authority of the equity investment holders as a group and whether there are any guaranteed returns, protection against losses, or capping of residual returns within the group and (iii) establishes whether activities within the venture are on behalf of an investor with disproportionately few voting rights in making this VIE determination. To the extent that the Company (i) is the sole entity that has the power to direct the activities of the VIE and (ii) has the obligation or rights to absorb the VIE's losses or receive its benefits, then the Company would be the primary beneficiary and would consolidate the VIE. All significant intercompany transactions and accounts have been eliminated. Reclassifications Certain amounts from prior years have been reclassified to conform to current-year presentation including reclassifying the accompanying consolidated balance sheets for assets held for sale. As disclosed in Note 12, Shareholders' Equity - Trust - Share Repurchase, the Company repurchased common shares pursuant to a share repurchase program authorized by the Company's Board of Trustees. These repurchased shares along with those repurchased in prior periods are subject to state corporate laws that establish the legal status of redeemed shares and prevent them from being reported as treasury shares within the consolidated financial statements. The Trust previously misclassified the repurchased shares as common shares in treasury. The share repurchases should have been classified as reductions of common shares of beneficial interest and additional paid-in capital. The accompanying consolidated balance sheet and statement of equity of the Trust has been restated to correct the misclassification as follows (in thousands except share amounts): December 31, January 1, 2014 2013 2013 Common shares of beneficial interest (as previously reported) $ 150 $ 148 $ 119 Impact of reclassification (1 ) (1 ) (1 ) Common shares of beneficial interest (as adjusted and currently reported) $ 149 $ 147 $ 118 Additional paid-in capital (as previously reported) $ 3,740,594 $ 3,669,618 $ 2,687,701 Impact of reclassification (51,950 ) (51,950 ) (51,950 ) Additional paid-in capital (as adjusted and currently reported) $ 3,688,644 $ 3,617,668 $ 2,635,751 Common shares in treasury, at cost (as previously reported) $ (51,951 ) $ (51,951 ) $ (51,951 ) Impact of reclassification 51,951 51,951 51,951 Common shares in treasury, at cost (as adjusted and currently reported) $ — $ — $ — Number of common shares (as previously reported) 149,807,179 147,846,801 119,720,776 Impact of reclassification (1,249,909 ) (1,249,909 ) (1,249,909 ) Number of common shares (as adjusted and currently reported) 148,557,270 146,596,892 118,470,867 The reclassification has no impact on the previously reported consolidated statements of comprehensive income, nor does it have any effect on the previously reported consolidated statements of cash flows or shareholders' equity in total. In addition, the reclassification has no impact on the previously reported consolidated financial statements of the Operating Partnership. Real Estate and Depreciation The properties are recorded at cost and are depreciated using the straight line method over their estimated useful lives. The estimated useful lives are as follows: Building and improvements 40 years (blended) Capital improvements 15 - 20 years Equipment 5 - 10 years Tenant improvements Term of the related lease Expenditures directly related to the acquisition or the improvement of real estate, including interest and other costs capitalized during development, are included in net real estate and are stated at cost. The capitalized costs include pre-construction costs essential to the development of the property, development and construction costs, interest costs, real estate taxes, development-related salaries and other costs incurred during the period of development. The total of capitalized compensation costs directly related to the development of property for the years ended December 31, 2015 , 2014 and 2013 was $5.5 million , $5.1 million and $3.3 million , respectively. Construction related payables at December 31, 2015 and 2014 were $42.9 million and $41.5 million , respectively. The Company allocates the purchase price of real estate acquired to land, building and improvements and intangibles at the fair value of each component. Lease values for acquired properties are recorded based on the present value (using a discount rate which reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to each in-place lease and (ii) management's estimate of fair market lease rates for each corresponding in-place lease ("Market Value Intangible"). Origination values are also assigned to in-place leases, and, where appropriate, value is assigned to customer relationships ("Origination Value Intangible"). Acquisition-related costs for properties with in-place leases are expensed as incurred. Expenditures for maintenance and repairs are charged to operations as incurred. The Company depreciates the amounts allocated to building and improvements over 40 years and amortizes the amounts allocated to intangibles relating to in-place leases, which are included in deferred financing and leasing costs and other liabilities in the accompanying consolidated balance sheets, over the remaining term of the related leases. Market Value Intangible amortization is recorded as rental revenue. Origination Value Intangible amortization is recorded as depreciation and amortization. This calculation includes both the remaining noncancelable period and any bargain renewal option periods. Once a property is designated as held for sale, no further depreciation expense is recorded. The Company evaluates its real estate investments upon occurrence of a significant adverse change in its operations to assess whether any impairment indicators are present that affect the recovery of the recorded value. If indicators of impairment are identified, the Company estimates the future undiscounted cash flows from the use and eventual disposition of the property and compares this amount to the carrying value of the property. If any real estate investment is considered impaired, a loss is recognized to reduce the carrying value of the property to its estimated fair value. Investments in Unconsolidated Joint Ventures The Company accounts for its investments in unconsolidated joint ventures using the equity method of accounting as the Company exercises significant influence, but does not control these entities. Under the equity method of accounting, the net equity investment of the Company is reflected in the accompanying consolidated balance sheets and the Company's share of net income from the joint ventures is included in the accompanying consolidated statements of comprehensive income. On a periodic basis, management assesses whether there are any indicators that the value of the Company's investments in unconsolidated joint ventures may be other-than-temporarily-impaired. An investment is impaired only if management's estimate of the value of the investment is less than the carrying value of the investment, and such decline in value is deemed to be other-than-temporary. To the extent impairment has occurred, the loss is measured as the excess of the carrying amount of the investment over the estimated fair value of the investment. The estimated fair value of the investments is determined using a discounted cash flow model which is a Level 3 valuation under ASC 820, " Fair Value Measurement ." The Company considers a number of assumptions that are subject to economic and market uncertainties including, among others, demand for space, competition for tenants, changes in market rental rates, operating costs, capitalization rates, holding periods and discount rates. No impairment losses on the Company's investments in unconsolidated joint ventures were recognized during the years ended December 31, 2013, 2014 or 2015. Cash and Cash Equivalents Highly liquid investments with a maturity of three months or less when purchased are classified as cash equivalents. Restricted Cash Restricted cash includes tenant security deposits and escrow funds that the Company maintains pursuant to certain mortgage loans. Restricted cash also includes the undistributed proceeds from the sale of residential land in Kent County, United Kingdom. Accounts Receivable/Deferred Rent Receivable The Company's accounts receivable are comprised of rents and charges for property operating costs due from tenants. The Company's deferred rent receivable represents the cumulative difference between rent revenue recognized on a straight line basis and contractual payments due under the terms of tenant leases. The Company periodically performs a detailed review of amounts due from tenants to determine if accounts receivable and deferred rent receivable balances are collectible. Based on this review, accounts receivable and deferred rent receivable are reduced by an allowance for doubtful accounts. The Company considers tenant credit quality and payment history and general economic conditions in determining the allowance for doubtful accounts. If the accounts receivable balance or the deferred rent receivable balance is subsequently deemed uncollectible, the receivable and allowance for doubtful account balance are written off. The allowance for doubtful accounts at December 31, 2015 and 2014 was $6.9 million and $7.4 million , respectively. The Company had bad debt expense of $2.0 million , $1.7 million and $1.8 million for the years ended December 31, 2015 , 2014 and 2013 , respectively. Revenues The Company earns rental income under operating leases with tenants. Rental income is recognized on a straight line basis over the applicable non-cancelable lease term. Operating expense reimbursements consisting of amounts due from tenants for real estate taxes, utilities and other recoverable costs are recognized as revenue in the period in which the corresponding expenses are incurred. The Company considers any renewal options in determining the lease term. To the extent a lease includes a tenant option to renew or extend the duration of the lease at a fixed or determinable rental rate, the Company evaluates whether or not that option represents a bargain renewal option by analyzing if there is reasonable assurance at lease inception that the tenant will exercise the option because the rental rate is sufficiently lower than the expected rental rate for equivalent property under similar terms and conditions at the exercise date. Termination fees (included in rental revenue) are fees that the Company has agreed to accept in consideration for permitting certain tenants to terminate their lease prior to the contractual expiration date. The Company recognizes termination fees during the period that landlord services are rendered in accordance with Securities and Exchange Commission Staff Accounting Bulletin 104, " Revenue Recognition ," after the following conditions are met: a. the termination agreement is executed, b. the termination fee is determinable, and c. collectability of the termination fee is assured. Deferred Financing and Leasing Costs Costs incurred in connection with the financing of the credit facility or leasing are capitalized and amortized on a straight line basis over the term of the related loan or lease. Costs incurred in connection with the financing of mortgage loans or unsecured notes are reported as a deduction from the face amount of that liability and amortized on a straight line basis over the term of the related loan. Deferred financing cost amortization is reported as interest expense. Certain employees of the Company are compensated for leasing services related to the Company's properties. The compensation directly related to these leasing services is capitalized and amortized as a deferred leasing cost over the term of the related lease. The total of this capitalized compensation was $4.6 million , $3.9 million and $2.8 million for the years ended December 31, 2015 , 2014 and 2013 , respectively. Fair Value of Financial Instruments The following disclosure of estimated fair value was determined by management using available market information and appropriate valuation methodologies. However, considerable judgment is necessary to interpret market data and develop estimated fair value. Accordingly, the following estimates are not necessarily indicative of the amounts the Company could have realized on disposition of the financial instruments at December 31, 2015 and December 31, 2014 . The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts. The carrying value of cash and cash equivalents, restricted cash, accounts receivable, accounts payable, accrued interest, dividend and distributions payable and other liabilities are reasonable estimates of fair value because of the short-term nature of these instruments. The carrying value of the outstanding amounts under the Company's credit facility is also a reasonable estimate of fair value because interest rates float at a rate based on LIBOR. The Company determines the fair value of its interest rate swaps by using the standard methodology of netting discounted future fixed cash payments with the discounted expected variable cash receipts. These variable cash receipts of interest rate swaps are based on expectations of future LIBOR interest rates (forward curves) estimated by observing market LIBOR interest rate curves. This is a Level 2 fair value calculation. Also, credit valuation adjustments are factored into the fair value calculations to account for potential nonperformance risk. These credit valuation adjustments were concluded to be not significant inputs for the fair value calculations for the periods presented. See Note 21 - Derivative Instruments. The Company used a discounted cash flow model to determine the estimated fair value of its debt as of December 31, 2015 and December 31, 2014 . This is a Level 3 fair value calculation. The inputs used in preparing the discounted cash flow model include actual maturity dates and scheduled cash flows as well as estimates for market value discount rates. The Company updates the discounted cash flow model on a quarterly basis to reflect any changes in the Company's debt holdings and changes to discount rate assumptions. The following summarizes the fair value of the Company's mortgage loans and unsecured notes at December 31, 2014 and December 31, 2015 (in thousands): Mortgage Loans Unsecured Notes Carrying Value Fair Value Carrying Value Fair Value As of December 31, 2014 $ 484,852 $ 501,231 $ 2,498,021 $ 2,704,069 As of December 31, 2015 $ 307,908 $ 306,334 $ 2,580,108 $ 2,616,395 Income Taxes The Company has elected to be taxed as a REIT under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended (the "Code"). As a result, the Company generally is not subject to federal income taxation at the corporate level to the extent it distributes annually at least 100% of its REIT taxable income, as defined in the Code, to its shareholders and satisfies certain other organizational and operational requirements. The Company has met these requirements and, accordingly, no provision has been made for federal income taxes in the accompanying consolidated financial statements. If the Company fails to qualify as a REIT in any taxable year, the Company will be subject to federal income tax on its taxable income at regular corporate rates (including any alternative minimum tax) and may not be able to qualify as a REIT for the four subsequent taxable years. Even as a REIT, the Company may still be subject to certain state and local income and property taxes, and to federal income and excise taxes on undistributed taxable income. Several of the Company's subsidiaries are taxable REIT subsidiaries (each a "TRS") and are subject to federal and state income taxes separate from the Company. In general, a TRS may perform additional services for tenants and generally may engage in real estate or non-real estate businesses that are not permitted REIT activities. The Company itself is also subject to tax in certain states and the United Kingdom. Accordingly, the Company recognizes federal, state and foreign income taxes in accordance with US GAAP, as applicable. There are no uncertain tax positions or possibly significant unrecognized tax benefits that are reasonably expected to occur within the next 12 months. The Company's policy is to recognize interest accrued related to unrecognized benefits in interest expense and penalties in other expense. There were no interest or penalties deducted in any of the years ended December 31, 2015 , 2014 and 2013 and no interest and penalties accrued at December 31, 2015 or December 31, 2014 which related to any uncertain tax positions or significant unrecognized tax benefits. Certain of the Company's taxable REIT subsidiaries had net operating loss carryforwards available of approximately $29.1 million as of December 31, 2015 . These carryforwards begin to expire in 2018 . The Company has considered future taxable income and has determined that a valuation allowance for the full carrying value of net operating loss carryforwards is appropriate. The Company and its subsidiaries file income tax returns in the U.S. federal jurisdiction, certain state and local jurisdictions, the United Kingdom and (in prior years) Luxembourg. With few exceptions, the Company and its subsidiaries are no longer subject to examination by taxing authorities in these jurisdictions for years prior to 2009. The Federal tax cost basis of the wholly owned real estate was $7.6 billion and $7.5 billion at December 31, 2015 and 2014 , respectively. Share-Based Compensation Share-based compensation cost is measured at the grant date, based on the fair value of the award, and is recognized as expense over the employees' requisite service period. Derivative Financial Instruments We borrow funds at a combination of fixed and variable rates. Borrowings under our revolving credit facility and certain bank mortgage loans bear interest at variable rates. Our long-term debt typically bears interest at fixed rates. Our interest rate risk management objectives are to limit generally the impact of interest rate changes on earnings and cash flows and to lower our overall borrowing costs. To achieve these objectives, from time to time, we enter into interest rate hedge contracts such as collars, swaps, caps and treasury lock agreements in order to mitigate our interest rate risk with respect to various debt instruments. We generally do not hold or issue these derivative contracts for trading or speculative purposes. The interest rate on all of our variable rate debt is generally adjusted at one or three month intervals, subject to settlements under interest rate hedge contracts. Interest rate swaps involve the receipt of variable-rate amounts from a counterparty in exchange for making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive loss (for the Trust) and general partner's equity and limited partners' equity - common units (for the Operating Partnership) and is subsequently reclassified into interest expense in the period that the hedged forecasted transaction affects earnings. Foreign Currency The functional currency of the Company's United Kingdom operations is pounds sterling. The Company translates the financial statements for the United Kingdom operations into US dollars. For the Trust, gains and losses resulting from this translation are included in accumulated other comprehensive loss as a separate component of shareholders' equity and a proportionate amount of gain or loss is allocated to noncontrolling interest - operating partnership - common units. For the Operating Partnership, gains and losses resulting from this translation are included in general partner's equity and limited partners' equity - common units. Upon sale or upon complete or substantially complete liquidation of the Company's foreign investment, the gain or loss on the sale will include the cumulative translation adjustments that have been previously recorded in accumulated other comprehensive loss and noncontrolling interest - operating partnership - common units (for the Trust) and in general partner's equity and limited partners' equity - common units (for the Operating Partnership). Comprehensive Income Comprehensive income, as reflected on the consolidated statements of comprehensive income, is defined as all changes in equity during each period except for those resulting from investments by or distributions to shareholders. Accumulated other comprehensive loss, as reflected on the Company's consolidated balance sheets and consolidated statements of equity, reflects the effective portion of the cumulative changes in the fair value of derivatives in qualifying cash flow hedge relationships as well as gains and losses resulting from foreign currency translation. Sales of Real Estate The Company accounts for the sale of real estate assets and any related gain recognition in accordance with the accounting guidance applicable to sales of real estate, which establishes standards for recognition of profit on all real estate sales transactions, other than retail land sales. The Company recognizes the sale, and associated gain or loss from the disposition, provided that the earnings process is complete and the Company is not obligated to perform significant activities after the sale. Earnings Per Share of the REIT Basic earnings per share is calculated by dividing the income available to common shareholders for the period by the weighted average number of common shares outstanding during the period using the two class method. Diluted earnings per share is calculated by dividing the net income available to common shareholders for the period by the weighted average number of common and dilutive securities outstanding during the period. Earnings Per Unit of the Operating Partnership Basic earnings per unit is calculated by dividing the income available to common unitholders for the period by the weighted average number of common units outstanding during the period using the two class method. Diluted earnings per unit is calculated by dividing the income available to common unitholders for the period by the weighted average number of common and dilutive securities outstanding during the period. Change in Accounting Principle As of December 31, 2015, the Company has retrospectively adjusted the presentation of deferred financing costs on the consolidated balance sheets for all prior periods, as required by the new debt issuance costs guidance issued in April 2015. See discussion under "Recently Issued Accounting Standards." The guidance requires debt issuance costs to be presented as a direct deduction from the related debt liability rather than as an asset, except for costs associated with the credit facility. The prior period amounts that have been impacted by the new guidance and retrospectively adjusted include deferred financing and leasing costs, net, unsecured notes, net and mortgages, net, located on the consolidated balance sheets. The following table presents the impact of the change in accounting principle to the consolidated balance sheets of the Trust and the Operating Partnership as of December 31, 2014 (in thousands): As of December 31, 2014 Deferred financing and leasing costs, net Mortgage loans, net Unsecured notes, net As previously reported $ 206,286 $ 487,301 $ 2,509,094 Impact of change in accounting principle (13,522 ) (2,449 ) (11,073 ) As adjusted and currently reported $ 192,764 $ 484,852 $ 2,498,021 The following table presents the impact of the change in accounting principle to the consolidated balance sheets of the Trust and the Operating Partnership as of December 31, 2015 (in thousands): As of December 31, 2015 Deferred financing and leasing costs, net Mortgage loans, net Unsecured notes, net As would have been reported prior to change in accounting principle $ 206,327 $ 309,711 $ 2,592,523 Impact of change in accounting principle (14,218 ) (1,803 ) (12,415 ) As reported $ 192,109 $ 307,908 $ 2,580,108 Recently Issued Accounting Standards In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) ("ASU 2014-09"), which supersedes nearly all existing revenue recognition guidance. The standard clarifies the required factors that an entity must consider when recognizing revenue. The standard also requires additional disclosures concerning contracts with customers, judgments concerning revenue recognition, and assets recognized for the costs to obtain or fulfill a contract. ASU 2014-09 is effective for the Company beginning January 1, 2018. The Company is evaluating the impact ASU 2014-09 will have on its financial position and results of operations. In April 2015, the FASB issued ASU 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs ("ASU 2015-03"). The standard requires the costs for issuing debt to appear on a balance sheet as a direct deduction from the debt's value. In August 2015, the FASB issued ASU 2015-15, Interest - Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurements of Debt Issuance Costs Associated with Line-of-Credit Arrangements . The standard allows companies to elect to continue to classify costs related to a credit facility as an asset, and the Company has elected to do so. ASU 2015-03 is effective for the Company beginning January 1, 2016 and the standard allows for early adoption. The Company has adopted ASU 2015-03 as of December 31, 2015 and the standard has been applied retrospectively. See "Change in Accounting Principle" above. In February 2015, the FASB issued ASU 2015-02, Amendments to the Consolidation Analysis (Topic 810) ("ASU 2015-02"). The standard requires that all entities re-evaluate and revise consolidation documentation for limited partnerships and similar legal entities. It makes changes to both the variable interest model and voting model. ASU 2015-02 is effective for the Company beginning January 1, 2016. The standard allows for either a full retrospective or a modified retrospective approach to adoption. The Company does not believe that ASU 2015-02 will have a material impact on its financial position and results of operations. In February 2016, the FASB issued ASU 2016-02, ‘‘ Leases ’’ ("ASU 2016-02"). ASU 2016-02 amends the existing accounting standards for lease accounting, including requiring lessees to recognize most leases on their balance sheets and making targeted changes to lessor accounting. ASU 2016-02 is effective for the Company beginning January 1, 2019. Early adoption of ASU 2016-02 is permitted. The standard requires a modified retrospective transition approach for all leases existing at, or entered into after, the date of initial application, with an option to use certain transition relief. The Company is evaluating the impact ASU 2016-02 will have on its financial position and results of operations.

Income per Common Share of the

Income per Common Share of the Trust	12 Months Ended
	Dec. 31, 2015
Earnings Per Share [Abstract]
Earnings common share of the Trust [Text Block]	INCOME PER COMMON SHARE OF THE TRUST The following table sets forth the computation of basic and diluted income per common share of the Trust (in thousands except per share amounts): 2015 2014 Income (Numerator) Weighted Average Shares (Denominator) Per Share Income (Numerator) Weighted Average Shares (Denominator) Per Share Income from continuing operations net of noncontrolling interest - basic $ 238,039 148,243 $ 1.61 $ 170,471 147,216 $ 1.16 Dilutive shares for long-term compensation plans — 600 — 670 Income from continuing operations net of noncontrolling interest - diluted $ 238,039 148,843 $ 1.60 $ 170,471 147,886 $ 1.15 Discontinued operations net of noncontrolling interest - basic $ — 148,243 $ — $ 47,439 147,216 $ 0.32 Dilutive shares for long-term compensation plans — 600 — 670 Discontinued operations net of noncontrolling interest - diluted $ — 148,843 $ — $ 47,439 147,886 $ 0.32 Net income available to common shareholders - basic $ 238,039 148,243 $ 1.61 $ 217,910 147,216 $ 1.48 Dilutive shares for long-term compensation plans — 600 — 670 Net income available to common shareholders - diluted $ 238,039 148,843 $ 1.60 $ 217,910 147,886 $ 1.47 2013 Income (Numerator) Weighted Average Shares (Denominator) Per Share Income from continuing operations net of noncontrolling interest - basic $ 91,274 130,180 $ 0.70 Dilutive shares for long-term compensation plans — 729 Income from continuing operations net of noncontrolling interest - diluted $ 91,274 130,909 $ 0.70 Discontinued operations net of noncontrolling interest - basic $ 118,464 130,180 $ 0.91 Dilutive shares for long-term compensation plans — 729 Discontinued operations net of noncontrolling interest - diluted $ 118,464 130,909 $ 0.90 Net income available to common shareholders - basic $ 209,738 130,180 $ 1.61 Dilutive shares for long-term compensation plans — 729 Net income available to common shareholders - diluted $ 209,738 130,909 $ 1.60 Dilutive shares for long-term compensation plans represent the unvested common shares outstanding during the year as well as the dilutive effect of outstanding options. The amounts of anti-dilutive options that were excluded from the computation of diluted income per common share as the exercise price was higher than the average share price of the Company in 2015 , 2014 and 2013 were 1.5 million , 850,000 and 959,000 , respectively. During the years ended December 31, 2015 , 2014 and 2013 , 65,000 , 44,000 and 504,000 common shares, respectively, were issued upon the exercise of options. During the years ended December 31, 2015 , 2014 and 2013 , individuals acquired 14,491 , 3,000 and 157,285 common shares, respectively, in exchange for the same number of common units. These individuals acquired these common units in connection with their contributions to the Operating Partnership of certain assets in prior years. The exchange of common shares for the common units is exempt from the registration requirement of the Securities Act of 1933, as amended, pursuant to Section 4(2) thereunder. During the years ended December 31, 2015 , 2014 and 2013 , distributions per common share were $1.90 for each period.

Income per Common Unit of the O

Income per Common Unit of the Operating Partnership	12 Months Ended
	Dec. 31, 2015
Earnings Per Unit, Basic and Diluted [Line Items]
Earnings per common unit of the Operating Partnership [Text Block]	INCOME PER COMMON SHARE OF THE TRUST The following table sets forth the computation of basic and diluted income per common share of the Trust (in thousands except per share amounts): 2015 2014 Income (Numerator) Weighted Average Shares (Denominator) Per Share Income (Numerator) Weighted Average Shares (Denominator) Per Share Income from continuing operations net of noncontrolling interest - basic $ 238,039 148,243 $ 1.61 $ 170,471 147,216 $ 1.16 Dilutive shares for long-term compensation plans — 600 — 670 Income from continuing operations net of noncontrolling interest - diluted $ 238,039 148,843 $ 1.60 $ 170,471 147,886 $ 1.15 Discontinued operations net of noncontrolling interest - basic $ — 148,243 $ — $ 47,439 147,216 $ 0.32 Dilutive shares for long-term compensation plans — 600 — 670 Discontinued operations net of noncontrolling interest - diluted $ — 148,843 $ — $ 47,439 147,886 $ 0.32 Net income available to common shareholders - basic $ 238,039 148,243 $ 1.61 $ 217,910 147,216 $ 1.48 Dilutive shares for long-term compensation plans — 600 — 670 Net income available to common shareholders - diluted $ 238,039 148,843 $ 1.60 $ 217,910 147,886 $ 1.47 2013 Income (Numerator) Weighted Average Shares (Denominator) Per Share Income from continuing operations net of noncontrolling interest - basic $ 91,274 130,180 $ 0.70 Dilutive shares for long-term compensation plans — 729 Income from continuing operations net of noncontrolling interest - diluted $ 91,274 130,909 $ 0.70 Discontinued operations net of noncontrolling interest - basic $ 118,464 130,180 $ 0.91 Dilutive shares for long-term compensation plans — 729 Discontinued operations net of noncontrolling interest - diluted $ 118,464 130,909 $ 0.90 Net income available to common shareholders - basic $ 209,738 130,180 $ 1.61 Dilutive shares for long-term compensation plans — 729 Net income available to common shareholders - diluted $ 209,738 130,909 $ 1.60 Dilutive shares for long-term compensation plans represent the unvested common shares outstanding during the year as well as the dilutive effect of outstanding options. The amounts of anti-dilutive options that were excluded from the computation of diluted income per common share as the exercise price was higher than the average share price of the Company in 2015 , 2014 and 2013 were 1.5 million , 850,000 and 959,000 , respectively. During the years ended December 31, 2015 , 2014 and 2013 , 65,000 , 44,000 and 504,000 common shares, respectively, were issued upon the exercise of options. During the years ended December 31, 2015 , 2014 and 2013 , individuals acquired 14,491 , 3,000 and 157,285 common shares, respectively, in exchange for the same number of common units. These individuals acquired these common units in connection with their contributions to the Operating Partnership of certain assets in prior years. The exchange of common shares for the common units is exempt from the registration requirement of the Securities Act of 1933, as amended, pursuant to Section 4(2) thereunder. During the years ended December 31, 2015 , 2014 and 2013 , distributions per common share were $1.90 for each period.
Liberty Property Limited Partnership [Member]
Earnings Per Unit, Basic and Diluted [Line Items]
Earnings per common unit of the Operating Partnership [Text Block]	INCOME PER COMMON UNIT OF THE OPERATING PARTNERSHIP The following table sets forth the computation of basic and diluted income per common unit of the Operating Partnership (in thousands, except per unit amounts): 2015 2014 Income (Numerator) Weighted Average Units (Denominator) Per Unit Income (Numerator) Weighted Average Units (Denominator) Per Unit Income from continuing operations net of noncontrolling interest - consolidated joint ventures $ 244,197 $ 175,035 Less: Preferred unit distributions (472 ) (472 ) Income from continuing operations available to common unitholders - basic $ 243,725 151,783 $ 1.61 $ 174,563 150,770 $ 1.16 Dilutive units for long-term compensation plans — 600 — 670 Income from continuing operations available to common unitholders - diluted $ 243,725 152,383 $ 1.60 $ 174,563 151,440 $ 1.15 Income from discontinued operations - basic $ — 151,783 $ — $ 48,581 150,770 $ 0.32 Dilutive units for long-term compensation plans — 600 — 670 Income from discontinued operations - diluted $ — 152,383 $ — $ 48,581 151,440 $ 0.32 Income available to common unitholders - basic $ 243,725 151,783 $ 1.61 $ 223,144 150,770 $ 1.48 Dilutive units for long-term compensation plans — 600 — 670 Income available to common unitholders - diluted $ 243,725 152,383 $ 1.60 $ 223,144 151,440 $ 1.47 2013 Income (Numerator) Weighted Average Units (Denominator) Per Unit Income from continuing operations net of noncontrolling interest - consolidated joint ventures $ 97,102 Less: Preferred unit distributions (2,119 ) Excess of preferred unit redemption over carrying amount (1,236 ) Income from continuing operations available to common unitholders - basic $ 93,747 133,858 $ 0.70 Dilutive units for long-term compensation plans — 729 Income from continuing operations available to common unitholders - diluted $ 93,747 134,587 $ 0.70 Income from discontinued operations - basic $ 121,839 133,858 $ 0.91 Dilutive units for long-term compensation plans — 729 Income from discontinued operations - diluted $ 121,839 134,587 $ 0.90 Income available to common unitholders - basic $ 215,586 133,858 $ 1.61 Dilutive units for long-term compensation plans — 729 Income available to common unitholders - diluted $ 215,586 134,587 $ 1.60 Dilutive units for long-term compensation plans represent the unvested common units outstanding during the year as well as the dilutive effect of outstanding options. The amounts of anti-dilutive options that were excluded from the computation of diluted income per common unit as the exercise price was higher than the average unit price of the Company in 2015 , 2014 and 2013 were 1.5 million , 850,000 and 959,000 , respectively. During the years ended December 31, 2015 , 2014 and 2013 , 65,000 , 44,000 and 504,000 common units, respectively, were issued upon the exercise of options. During the years ended December 31, 2015 , 2014 and 2013 , individuals acquired 14,491 , 3,000 and 157,285 common shares of the Trust in exchange for the same number of common units of the Operating Partnership. These individuals acquired these common units in connection with their contributions to the Operating Partnership of certain assets in prior years. The exchange of common shares for the common units is exempt from the registration requirement of the Securities Act of 1933, as amended, pursuant to Section 4(2) thereunder. During the years ended December 31, 2015 , 2014 and 2013 , distributions per common unit were $1.90 for each period.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	12 Months Ended
	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Comprehensive Income (Loss) Note [Text Block]	ACCUMULATED OTHER COMPREHENSIVE LOSS The following table sets forth the components of Accumulated Other Comprehensive Loss (in thousands): December 31, 2015 2014 Foreign Currency Translation: Beginning balance $ (5,823 ) $ 8,592 Translation adjustment (11,433 ) (14,415 ) Ending balance (17,256 ) (5,823 ) Derivative Instruments: Beginning balance (377 ) 1,584 Unrealized loss (1,884 ) (3,419 ) Reclassification adjustment (1) 1,396 1,458 Ending balance (865 ) (377 ) Total accumulated other comprehensive loss (18,121 ) (6,200 ) Less: portion included in noncontrolling interest – operating partnership 228 (52 ) Total accumulated other comprehensive loss included in shareholders' equity $ (17,893 ) $ (6,252 ) (1) Amounts reclassified out of Accumulated Other Comprehensive Loss/General & Limited Partner's Equity into contractual interest expense.

Real Estate

Real Estate	12 Months Ended
	Dec. 31, 2015
Real Estate [Abstract]
Real Estate Disclosure [Text Block]	REAL ESTATE The Company owns and operates industrial and office properties. The carrying value of these properties by type as of December 31, 2015 and 2014 is as follows (in thousands): Land Building and Land and Accumulated Improvements Improvements Total Depreciation 2015 Industrial properties $ 824,140 $ 3,637,484 $ 4,461,624 $ 698,456 Office properties 360,787 1,494,164 1,854,951 450,472 2015 Total $ 1,184,927 $ 5,131,648 $ 6,316,575 $ 1,148,928 2014 Industrial properties $ 773,874 $ 3,513,534 $ 4,287,408 $ 620,967 Office properties 414,900 1,825,780 2,240,680 561,162 2014 Total $ 1,188,774 $ 5,339,314 $ 6,528,088 $ 1,182,129 Depreciation expense was $181.0 million , $179.1 million and $162.5 million for the years ended December 31, 2015 , 2014 and 2013 , respectively. Information on the operating properties the Company sold during the years ended December 31, 2015 and 2014 is as follows: 2015 Sales Reportable Segment Number of Buildings Acres of Developable Land (unaudited) Leaseable Square Feet (unaudited) Gross Proceeds (in thousands) Minnesota 2 — 222,642 $ 25,700 Orlando 1 — 713,585 35,500 Richmond/Hampton Roads 22 3 1,319,299 110,054 South Florida 1 — 99,740 14,700 Southeastern PA 46 20 2,724,489 316,583 Tampa 2 — 60,800 5,225 Other 7 — 569,618 37,371 Total 81 23 5,710,173 $ 545,133 2014 Sales Reportable Segment Number of Buildings Acres of Developable Land (unaudited) Leaseable Square Feet (unaudited) Gross Proceeds (in thousands) Houston 5 — 553,510 $ 29,721 Maryland 23 19 1,367,569 185,460 Minnesota 1 — 191,336 41,000 New Jersey 27 51 1,790,893 164,767 Orlando 4 — 588,678 116,750 Southeastern PA 3 — 113,833 12,225 Other 2 — 134,510 8,655 Total 65 70 4,740,329 $ 558,578 Included in the sales for the year ended December 31, 2015 are 22 properties and three acres of land in the Richmond/Hampton Roads segment that the Company sold for $110.3 million to a firm in which the brother of David L. Lingerfelt, a member of the Company's Board of Trustees, has an equity interest. During the three months ended December 31, 2015, The Company completed a portfolio sale consisting of 41 properties and 20 acres of land in the Southeastern PA segment. The Company has deferred gain recognition related to this sale in the amount of $14.3 million which is recorded in other liabilities on the accompanying consolidated balance sheets. For the year ended December 31, 2015, $100.3 million in gains were included in gain on property dispositions in the Company's consolidated statements of comprehensive income. For the year ended December 31, 2014, $45.1 million in gains were included in gain on property dispositions and $46.6 million in gains were included in discontinued operations in the Company's consolidated statements of comprehensive income. For the year ended December 31, 2013, $96.3 million in gains were included in discontinued operations in the Company's consolidated statements of comprehensive income. Information on the operating properties and land parcels the Company acquired during the years ended December 31, 2015 and 2014 is as follows: 2015 Acquisitions Reportable Segment Number of Buildings Acres of Developable Land (unaudited) Leaseable Square Feet (unaudited) Purchase Price (in thousands) Houston 3 139 921,196 $ 86,497 Lehigh/Central PA — 281 — 62,402 Minnesota 1 188 197,956 24,541 Richmond/Hampton Roads — 94 — 1,727 Other 1 56 410,059 45,248 Total 5 758 1,529,211 $ 220,415 2014 Acquisitions Reportable Segment Number of Buildings Acres of Developable Land (unaudited) Leaseable Square Feet (unaudited) Purchase Price (in thousands) Carolinas 7 104 947,365 $ 61,293 Chicago/Milwaukee — 16 — 7,914 Houston — 110 — 26,210 Lehigh/Central PA — 85 — 15,307 Minnesota — 24 — 2,966 South Florida — 69 — 12,027 Other 3 94 981,243 86,476 Total 10 502 1,928,608 $ 212,193

Investments in Unconsolidated J

Investments in Unconsolidated Joint Ventures	12 Months Ended
	Dec. 31, 2015
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments Disclosure [Text Block]	INVESTMENTS IN UNCONSOLIDATED JOINT VENTURES Listed below are the unconsolidated joint ventures in which the Company has a noncontrolling interest. The Company receives fees from these joint ventures for services it provides. These services include property management, leasing, development and administration. These fees are included in interest and other income in the accompanying consolidated statements of comprehensive income. The Company may also receive a promoted interest if certain return thresholds are met. The accounting policies for the unconsolidated joint ventures in which the Company has a noncontrolling interest are the same as those for the Company. All related party fees noted below are included in interest and other income in the Company's consolidated statements of comprehensive income. On a periodic basis, management assesses whether there are any indicators that the value of the properties owned by the unconsolidated joint ventures may be impaired. As detailed below, management has determined that certain assets are impaired as the unconsolidated joint ventures dispose of and anticipate the potential disposition of certain properties prior to the end of their remaining useful lives. Liberty Venture I, LP As of December 31, 2015 , the Company had a 25% interest in Liberty Venture I, LP, an entity engaged in the ownership of industrial properties in New Jersey. This joint venture is part of the Company's New Jersey reportable segment. As of December 31, 2015 , the joint venture owned 26 industrial properties totaling 3.7 million square feet and 36 acres of developable land. The joint venture also had two properties under development, which are expected to comprise, upon completion, 825,000 square feet and are expected to represent a Total Investment of $54.2 million . During the year ended December 31, 2015, the joint venture realized gross proceeds of $8.5 million from the sale of one property totaling 198,000 square feet. The Company had a receivable from Liberty Venture I, LP for $451,000 as of December 31, 2015 . This related party receivable is reflected as prepaid expenses and other assets in the Company's consolidated balance sheets. During the year ended December 31, 2014, the joint venture acquired three properties comprising 603,000 square feet and 51 acres of land from the Company for $43.0 million . The Company recognized a gain of $2.5 million on this transaction. This gain is included in gain on property dispositions in the Company's consolidated statements of comprehensive income. The Company recognized $1.6 million , $1.4 million and $578,000 in fees for services during the years ended December 31, 2015 , 2014 and 2013 , respectively. Kings Hill Unit Trust As of December 31, 2015 , the Company had a 20% interest in Kings Hill Unit Trust, an entity engaged in the ownership of office and industrial properties in the County of Kent, United Kingdom. This joint venture is part of the Company's United Kingdom reportable segment. As of December 31, 2015 , the joint venture owned three industrial properties and 11 office properties totaling 490,000 square feet. The Company had notes receivable from Kings Hill Unit Trust for an aggregate of $4.7 million and $18.1 million as of December 31, 2015 and 2014 , respectively. The note receivable bears interest at a rate of 10% and is due in November 2020. These related party receivables are reflected in investments in and advances to unconsolidated joint ventures in the Company's consolidated balance sheets. The Company had a receivable from Kings Hill Unit Trust for $271,000 as of December 31, 2015. This related party receivable is reflected as prepaid expenses and other assets in the Company's consolidated balance sheets. The Company had a receivable from Kings Hill Unit Trust for $267,000 as of December 31, 2014. This related party receivable is reflected in accounts receivable in the Company's consolidated balance sheets. During the year ended December 31, 2013 the Kings Hill Unit Trust joint venture recorded an impairment charge. The Company's share of this impairment charge was $0.8 million and is reflected in equity in earnings of unconsolidated joint ventures in the Company's consolidated statement of comprehensive income. The Company determined these impairments based on third party offer prices. This is a Level 2 fair value calculation. The Company recognized $304,000 , $285,000 and $237,000 in fees for services during the years ended December 31, 2015 , 2014 and 2013 , respectively. Liberty Illinois, LP As of December 31, 2015 , the Company had a 25% interest in Liberty Illinois, LP, an entity primarily engaged in the ownership of industrial properties in Illinois. This joint venture is part of the Company's Chicago/Milwaukee reportable segment. As of December 31, 2015 , the joint venture owned 15 industrial properties totaling 5.1 million square feet and 248 acres of developable land. The joint venture also had one property under development, which is expected to comprise, upon completion, 430,000 square feet and is expected to represent a Total Investment of $24.6 million . The Company recognized $1.3 million , $1.0 million and $952,000 in fees for services during the years ended December 31, 2015 , 2014 and 2013 , respectively. Blythe Valley JV Sarl As of January 1, 2013, the Company had a 20% interest in Blythe Valley JV Sarl, an entity engaged in the ownership of office properties in the West Midlands, United Kingdom. This joint venture was part of the Company's United Kingdom reportable segment. The Company no longer holds an interest in this joint venture. The Company recognized $33,000 in fees for services during the year ended December 31, 2013. Liberty Washington, LP As of December 31, 2015 , the Company had a 25% interest in Liberty Washington, LP, an entity engaged in the ownership of office properties in Northern Virginia and Washington, D.C. This joint venture's properties are part of the Company's Northern Virginia and Washington D.C. reportable segments. As of December 31, 2015 , the joint venture owned 20 office properties totaling 2.3 million square feet and six acres of developable land. During the quarter ended December 31, 2015, the joint venture realized gross proceeds of $5.0 million from the sale of one property totaling 80,000 square feet. The Company had a receivable from Liberty Washington, LP for $693,000 and $470,000 as of December 31, 2015 and 2014 , respectively. This related party receivable is reflected as prepaid expenses and other assets in the Company's consolidated balance sheets. During the year ended December 31, 2014, the Company concluded that certain of the properties owned by this joint venture were impaired and the joint venture recorded an impairment charge of $172.7 million . The Company was not required to record its share of this impairment charge through equity in earnings of unconsolidated joint ventures as this amount was previously recognized through an other-than-temporary impairment charge related to this joint venture that was recorded in 2009. During the year ended December 31, 2015, the Company concluded that certain of the properties owned by this joint venture were impaired and the joint venture recorded impairment charges of $56.8 million . The Company's share of this impairment charge was $11.5 million . The impairment charges were related to the Company's Northern Virginia reportable segment and the Company's share was included in equity in earnings of unconsolidated joint ventures in the accompanying consolidated statements of comprehensive income. The Company determined these impairments based on third party offer prices. This is a Level 2 fair value calculation. As of December 31, 2015, the joint venture was in default of a $46.4 million non-recourse mortgage loan related to certain properties within the joint venture in the Company's Northern Virginia reportable segment. The Company recognized $4.8 million , $4.4 million and $4.9 million in fees for services during the years ended December 31, 2015 , 2014 and 2013 , respectively. Liberty/Comcast 1701 JFK Boulevard, LP As of December 31, 2015 , the Company had a 20% interest in Liberty/Comcast 1701 JFK Boulevard LP ("Liberty/Comcast"), formerly known as Liberty/Commerz 1701 JFK Boulevard, LP, an entity engaged in the ownership of a 1.25 million square foot office tower in Philadelphia, Pennsylvania. During the year ended December 31, 2015, the limited partnership agreement was amended to replace the general partner and admit a new general partner. As a result of this amendment the Company determined that this joint venture is a VIE. Because the Company and its third party partner share control of the joint venture as both parties have the power to direct its activities, the Company determined that it is not the primary beneficiary and that the equity method of accounting is appropriate. This joint venture is part of the Company's Philadelphia reportable segment. The Company had a payable to this joint venture for $59,000 as of both December 31, 2015 and 2014 . This related party payable is reflected in investments in and advances to unconsolidated joint ventures in the Company's consolidated balance sheets. The Company had a receivable from this joint venture for $407,000 and $409,000 as of December 31, 2015 and 2014 , respectively. This related party receivable is reflected in prepaid expenses and other assets in the Company's consolidated balance sheets. The Company recognized $2.7 million , $2.4 million and $2.2 million in fees for services during the years ended December 31, 2015 , 2014 and 2013 respectively. Liberty Property 18th & Arch LP and Liberty Property 18th & Arch Hotel, LP On June 30, 2014, the Company entered into two joint ventures for the purpose of developing and owning the Comcast Innovation & Technology Center (the "Project") located in Philadelphia, Pennsylvania as part of a mixed-use development. The 59 -story building will include 1.3 million square feet of leasable office space (the "Office") and a 222 -room Four Seasons Hotel (the "Hotel") (collectively, "Liberty Property 18th and Arch"). Completion of the first phase of the Project is anticipated to be in the third quarter of 2017. Project costs for the development of the Project, exclusive of tenant-funded interior improvements, are anticipated to be approximately $932 million . The Company's investment in the project is expected to be approximately $186 million with 20% ownership interests in both joint ventures. As of December 31, 2015 , the Company's investment in these joint ventures was $62.7 million and is reflected in investments in and advances to unconsolidated joint ventures in the Company's consolidated balance sheet. The Company began development on the building during 2014 and as of December 31, 2015 , the total development in progress for the Project was $323.6 million . These joint ventures are part of the Company's Philadelphia reportable segment. The two joint ventures have engaged the Company as the developer of the Project pursuant to a Development Agreement by which the Company agrees, in consideration for a development fee, to be responsible for all aspects of the development of the Project and to guarantee the timely lien-free completion of construction of the Project and the payment, subject to certain exceptions, of any cost overruns incurred in the development of the Project. The Company is accounting for the development of this project using the percentage of completion method. During the years ended December 31, 2015 and 2014, the Company recognized $5.1 million and $1.8 million , respectively, in developer and other fees related to the project. The Company had a payable to this joint venture of $1.2 million as of December 31, 2015. This payable is included in other liabilities in the Company's consolidated balance sheets. Additionally, the Company had a payable to this joint venture of $554,000 as of December 31, 2014. This payable is included in prepaid expenses and other assets in the Company's consolidated balance sheets. The Company will manage and lease the Office and Four Seasons Hotels Limited will manage the Hotel. Other Joint Ventures As of December 31, 2015 , the Company had a 50% ownership interest in four additional unconsolidated joint ventures. One of these joint ventures has four operating properties and an investment in land held for development and is part of the Company's Orlando reportable segment. This joint venture also had two properties under development, which are expected to comprise, upon completion, 369,000 square feet and are expected to represent a Total Investment of $20.3 million . One of these joint ventures has one operating property and an investment in land held for development and is part of the Company's United Kingdom reportable segment. One of these joint ventures owns one acre of developable land and is part of the Company's Philadelphia reportable segment. The final joint venture has a leasehold interest and does not operate or own operating properties and is part of the Company's United Kingdom reportable segment. The Company had a note payable due to this joint venture of $2.7 million and $2.9 million as of December 31, 2015 and 2014 , respectively. The note payable is interest free and is due upon written notice from the joint venture. This related party payable is reflected in investments in and advances to unconsolidated joint ventures in the Company's consolidated balance sheets. The Company's share of each of the joint venture's earnings is included in equity in earnings of unconsolidated joint ventures in the accompanying consolidated statements of comprehensive income. Summary Financial Data The condensed balance sheets as of December 31, 2015 and 2014 and condensed statements of operations for the years ended December 31, 2015 , 2014 and 2013 for Liberty Venture I, LP, Kings Hill Unit Trust, Liberty Illinois, LP, Blythe Valley JV Sarl (no remaining interest as of December 31, 2013), Liberty Washington, LP, Liberty/Comcast, Liberty Property 18th & Arch, and the other unconsolidated joint ventures are as follows (in thousands): Condensed Balance Sheets: December 31, 2015 Liberty Kings Hill Liberty Liberty Liberty/ Liberty Property Venture I, LP Unit Trust Illinois, LP Washington, LP Comcast (3) 18th & Arch (2) Other Total Real estate assets $ 168,690 $ 164,603 $ 263,552 $ 534,132 $ 495,248 $ — $ 67,940 $ 1,694,165 Accumulated depreciation (37,473 ) (28,513 ) (54,308 ) (43,224 ) (111,067 ) — (10,950 ) (285,535 ) Real estate assets, net 131,217 136,090 209,244 490,908 384,181 — 56,990 1,408,630 Development in progress 34,878 — 22,998 — — 323,615 17,401 398,892 Land held for development 4,471 — 28,590 2,000 — — 42,495 77,556 Other assets 14,860 8,967 20,668 52,429 47,441 15,594 49,312 209,271 Total assets $ 185,426 $ 145,057 $ 281,500 $ 545,337 $ 431,622 $ 339,209 $ 166,198 $ 2,094,349 Debt $ 121,793 $ 99,603 $ 155,601 $ 314,080 $ 313,402 $ — $ 56,739 $ 1,061,218 Other liabilities 10,571 27,408 8,594 10,634 9,618 40,958 29,064 136,847 Equity 53,062 18,046 117,305 220,623 108,602 298,251 80,395 896,284 Total liabilities and equity $ 185,426 $ 145,057 $ 281,500 $ 545,337 $ 431,622 $ 339,209 $ 166,198 $ 2,094,349 Company's net investment in unconsolidated joint ventures (1) $ 11,563 $ 6,789 $ 18,221 $ 55,552 $ 20,465 $ 62,677 $ 43,187 $ 218,454 December 31, 2014 Liberty Kings Hill Liberty Liberty Liberty/ Liberty Property Venture I, LP Unit Trust Illinois, LP Washington, LP Comcast (3) 18th and Arch (2) Other Total Real estate assets $ 173,346 $ 173,707 $ 260,988 $ 603,413 $ 494,678 $ — $ 69,041 $ 1,775,173 Accumulated depreciation (32,752 ) (26,494 ) (48,191 ) (35,384 ) (97,189 ) — (9,651 ) (249,661 ) Real estate assets, net 140,594 147,213 212,797 568,029 397,489 — 59,390 1,525,512 Development in progress — — 17,973 — — 111,244 4,366 133,583 Land held for development 14,108 — 28,362 2,000 — — 39,438 83,908 Other assets 15,523 14,928 20,182 50,657 52,393 1,306 38,215 193,204 Total assets $ 170,225 $ 162,141 $ 279,314 $ 620,686 $ 449,882 $ 112,550 $ 141,409 $ 1,936,207 Debt $ 78,748 $ 91,356 $ 145,752 $ 318,367 $ 317,934 $ — $ 43,114 $ 995,271 Other liabilities 5,215 94,504 13,812 12,022 9,657 13,398 14,306 162,914 Equity 86,262 (23,719 ) 119,750 290,297 122,291 99,152 83,989 778,022 Total liabilities and equity $ 170,225 $ 162,141 $ 279,314 $ 620,686 $ 449,882 $ 112,550 $ 141,409 $ 1,936,207 Company's net investment in unconsolidated joint ventures (1) $ 20,010 $ 11,663 $ 18,692 $ 69,230 $ 23,153 $ 21,292 $ 44,792 $ 208,832 Condensed Statements of Operations: Year Ended December 31, 2015 Liberty Kings Hill Unit Liberty Liberty Liberty/ Liberty Property Venture I, LP Trust (4) Illinois, LP Washington, LP Comcast 18th & Arch (2) Other (5) Total Total revenue $ 23,708 $ 12,602 $ 26,085 $ 71,101 $ 68,444 $ — $ 9,387 $ 211,327 Operating expense 7,977 5,261 9,303 27,384 29,692 221 2,727 82,565 15,731 7,341 16,782 43,717 38,752 (221 ) 6,660 128,762 Interest (5,415 ) (6,116 ) (8,441 ) (17,353 ) (19,936 ) — (2,248 ) (59,509 ) Depreciation and amortization (6,399 ) (3,954 ) (7,406 ) (20,725 ) (14,442 ) — (1,840 ) (54,766 ) Other income/(expense) 68 45,604 29 531 (227 ) 30 9,925 55,960 Gain (loss) on sale/impairment 760 — — (56,792 ) — — — (56,032 ) Net income (loss) $ 4,745 $ 42,875 $ 964 $ (50,622 ) $ 4,147 $ (191 ) $ 12,497 $ 14,415 Company's equity in earnings (loss) of unconsolidated joint ventures $ 1,540 $ (425 ) $ 807 $ (7,314 ) $ 2,053 $ (29 ) $ 6,517 $ 3,149 Year Ended December 31, 2014 Liberty Kings Hill Liberty Liberty Liberty/ Liberty Property Venture I, LP Unit Trust Illinois, LP Washington, LP Comcast 18th & Arch (2) Other (5) Total Total revenue $ 19,277 $ 13,221 $ 25,181 $ 72,824 $ 63,580 $ — $ 8,923 $ 203,006 Operating expense 6,398 5,387 8,965 28,349 23,557 199 2,897 75,752 12,879 7,834 16,216 44,475 40,023 (199 ) 6,026 127,254 Interest (5,078 ) (6,110 ) (7,932 ) (18,612 ) (20,179 ) — (3,415 ) (61,326 ) Depreciation and amortization (5,757 ) (4,135 ) (7,380 ) (27,112 ) (14,591 ) — (1,891 ) (60,866 ) Other income/(expense) (17 ) 208 39 375 (278 ) (13 ) 9,090 9,404 Gain (loss) on sale/impairment — — 187 (172,691 ) — — — (172,504 ) Net income (loss) $ 2,027 $ (2,203 ) $ 1,130 $ (173,565 ) $ 4,975 $ (212 ) $ 9,810 $ (158,038 ) Company's equity in earnings (loss) of unconsolidated joint ventures $ 788 $ (288 ) $ 824 $ 2,251 $ 1,633 $ (33 ) $ 5,139 $ 10,314 Year Ended December 31, 2013 Liberty Kings Hill Liberty Liberty Liberty/ Venture I, LP Unit Trust Illinois, LP Washington, LP Comcast Other Total Total revenue $ 16,238 $ 12,701 $ 24,455 $ 75,821 $ 62,411 $ 8,415 $ 200,041 Operating expense 5,248 4,187 8,353 27,549 23,074 2,636 71,047 10,990 8,514 16,102 48,272 39,337 5,779 128,994 Interest (5,318 ) (5,133 ) (8,348 ) (18,946 ) (20,391 ) (2,933 ) (61,069 ) Depreciation and amortization (4,414 ) (3,829 ) (7,382 ) (28,392 ) (14,734 ) (1,870 ) (60,621 ) Other income/(expense) 53 71 38 122 (233 ) (37 ) 14 Loss from discontinued operations — (5,647 ) — (8,731 ) — — (14,378 ) Net income (loss) $ 1,311 $ (6,024 ) $ 410 $ (7,675 ) $ 3,979 $ 939 $ (7,060 ) Company's equity in earnings (loss) of unconsolidated joint ventures $ 530 $ (908 ) $ 618 $ 3,748 $ 1,406 $ 673 $ 6,067 (1) Differences between the Company's net investment in unconsolidated joint ventures and its underlying equity in the net assets of the venture are primarily a result of impairments related to the Company's investment in unconsolidated joint ventures, the deferral of gains associated with the sales of properties to joint ventures in which the Company retains an ownership interest and loans made to the joint ventures by the Company. These adjustments have resulted in an aggregate difference reducing the Company's investments in unconsolidated joint ventures by $4.5 million as of December 31, 2015 and increasing the Company's investment in unconsolidated joint ventures by $3.2 million as of December 31, 2014 . Differences between historical cost basis and the basis reflected at the joint venture level (other than loans) are typically depreciated over the life of the related asset. (2) Represents the combined results of two joint ventures related to the property at 18th and Arch Streets, Philadelphia. (3) The Company's maximum exposure to loss is equal to the Company's net investment in unconsolidated joint ventures as of December 31, 2015 and 2014, respectively. (4) Other income/(expense) for this joint venture reflects forgiveness of related party debt between the joint venture and its investment partners consistent with each partner's equity ownership. (5) Other income/(expense) for this group of joint ventures reflects gains related to the sales of land leasehold interests totaling $9.9 million and $9.1 million for the years ended December 31, 2015 and 2014, respectively.

Deferred Financing and Leasing

Deferred Financing and Leasing Costs	12 Months Ended
	Dec. 31, 2015
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Intangible Assets Disclosure [Text Block]	DEFERRED FINANCING AND LEASING COSTS Deferred financing and leasing costs were comprised of the following as of December 31, 2015 and 2014 (in thousands): December 31, 2015 2014 Deferred financing costs $ 11,917 $ 11,917 Deferred leasing costs 229,798 215,714 Market value intangible 20,178 18,082 Origination value intangible 106,014 103,512 367,907 349,225 Accumulated amortization: Deferred financing costs 8,713 7,278 Deferred leasing costs 97,840 100,702 Market value intangible 10,358 8,266 Origination value intangible 58,887 40,215 175,798 156,461 Deferred financing and leasing costs, net $ 192,109 $ 192,764 Amortization of deferred financing costs was $4.4 million , $4.8 million and $4.1 million for the years ended December 31, 2015 , 2014 and 2013 , respectively. Amortization of deferred leasing costs and origination value intangible was $44.2 million , $51.3 million and $39.2 million for the years ended December 31, 2015 , 2014 and 2013 , respectively. As of December 31, 2015 , the remaining weighted-average amortization period was 3.7 years for market value intangible and 4.4 years for origination value intangible. The table above includes market value intangible assets. There were also $6.1 million and $7.5 million of unamortized market value intangible liabilities as of December 31, 2015 and 2014 , respectively. These liabilities are included as other liabilities in the accompanying consolidated balance sheets of the Company. Amortization of the aggregate asset and liability for market value intangible was an expense of $1.9 million , $2.8 million and $290,000 for the years ended December 31, 2015 , 2014 , and 2013 , respectively. These amounts were included as a decrease in rental revenue in the accompanying consolidated statements of comprehensive income. The aggregate amortization of net market value intangible assets and liabilities is a decrease (increase) in rental revenue over the next five years and thereafter as follows (in thousands): 2016 $ 1,804 2017 1,705 2018 1,222 2019 709 2020 (115 ) Thereafter (1,641 ) Total $ 3,684 The aggregate amortization expense for origination value intangible asset for the next five years and thereafter is as follows (in thousands): 2016 $ 16,378 2017 11,950 2018 7,640 2019 4,134 2020 2,119 Thereafter 4,906 Total $ 47,127 ]

Indebtedness

Indebtedness	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Debt Disclosure [Text Block]	INDEBTEDNESS Overview Indebtedness consists of mortgage loans, unsecured notes, and borrowings under a credit facility. The weighted average interest rates for the years ended December 31, 2015 , 2014 and 2013 were 4.6% , 5.0% and 5.1% , respectively. Interest costs during the years ended December 31, 2015 , 2014 and 2013 in the amount of $16.7 million , $13.2 million and $9.6 million , respectively, were capitalized. Cash paid for interest for the years ended December 31, 2015 , 2014 and 2013 was $149.6 million , $164.9 million and $143.2 million , respectively. The Company is subject to financial covenants contained in some of its debt agreements, the most restrictive of which are detailed below under the heading "Credit Facility." As of December 31, 2015 , the Company was in compliance with all financial and non-financial covenants. The scheduled principal amortization and maturities of the Company's mortgage loans, unsecured notes outstanding and the Credit Facility (as defined below) and the related weighted average interest rates at December 31, 2015 are as follows (in thousands, except percentages): Weighted Mortgages Average Principal Principal Unsecured Credit Interest Amortization Maturities Notes Facility Total Rate 2016 $ 9,518 $ 16,880 $ 300,000 $ — $ 326,398 5.53 % 2017 8,688 2,349 296,543 — 307,580 6.57 % 2018 6,470 27,102 100,000 259,000 392,572 3.26 % 2019 6,666 50,043 — — 56,709 4.00 % 2020 3,351 67,370 350,000 — 420,721 4.82 % 2021 2,326 65,091 — — 67,417 4.06 % 2022 2,172 — 400,000 — 402,172 4.13 % 2023 2,281 — 300,000 — 302,281 3.39 % 2024 2,385 — 450,000 — 452,385 4.40 % 2025 and thereafter 24,806 1,946 400,000 — 426,752 3.81 % Subtotal $ 68,663 $ 230,781 $ 2,596,543 $ 259,000 $ 3,154,987 4.42 % Reconciling items (1) 8,464 — (16,435 ) — (7,971 ) Total for consolidated balance sheet $ 77,127 $ 230,781 $ 2,580,108 $ 259,000 $ 3,147,016 (1) Includes deferred financing costs, premium/discount and market adjustments. Mortgage Loans and Unsecured Notes Mortgage loans with maturities ranging from 2016 to 2033 were collateralized by and in some instances cross-collateralized by properties with a net book value of $603.5 million as of December 31, 2015 . The interest rates on $2,896.0 million of mortgage loans (including $101.4 million fixed via a swap arrangement - see Footnote 21 - Derivative Instruments) and unsecured notes are fixed and range from 3.0% to 7.5% . The weighted average remaining term for the mortgage loans and unsecured notes is 5.7 years. Credit Facility The Company has maintained an unsecured credit facility throughout 2013 , 2014 and 2015 . During that period the Company has replaced, restated and amended its credit facility. This activity has resulted in changes to borrowing capacity, due dates, borrowing costs and covenant calculations. As replaced, restated and amended these credit facilities are referred to below as the "Credit Facility." The interest rate on borrowings under the Credit Facility fluctuates based upon ratings from Moody’s Investors Service, Inc., Standard and Poor’s Ratings Group and Fitch, Inc. Based on the Company's ratings as of December 31, 2015, borrowings under the Credit Facility bear interest at LIBOR plus 105 basis points. There is also a 20 basis point annual facility fee on the current borrowing capacity. The Credit Facility expires in March 2018 and has two six -month extensions at the Company's option, subject to the payment of a stated fee. The Credit Facility contains a competitive bid option, whereby participating lenders bid on the interest rate to be charged. This feature is available for up to 50% of the amount of the facility. There were $259.0 million of borrowings outstanding under the Credit Facility at December 31, 2015. The total borrowing capacity for the Credit Facility is $800 million and there is an accordion feature for an additional $400 million . The Credit Facility contains financial covenants, certain of which are set forth below: • total debt to total assets may not exceed 0.60 : 1 ; • earnings before interest, taxes, depreciation and amortization to fixed charges may not be less than 1.50 :1; • unsecured debt to unencumbered asset value must equal or be less than 60% ; and • unencumbered net operating income to unsecured interest expense must equal or exceed 175% . Activity In March 2014, the Company replaced its existing $500 million Credit Facility with an $800 million Credit Facility. In August 2014, the Company used proceeds from its Credit Facility together with available cash on hand to repay its 5.65% senior unsecured notes due August 2014 in the amount of $200 million . In March 2015, the Company used proceeds from its Credit Facility together with available cash on hand to repay its $300 million 5.125% senior unsecured notes due March 2015. In March 2015, the Company issued $400 million of 3.75% senior unsecured notes due 2025. The net proceeds from this issuance were used to repay borrowings under the Company's Credit Facility and for general corporate purposes. In August 2015, the Company used proceeds from its Credit Facility to prepay in full without penalty a $105.8 million 7.0% mortgage loan due February 2016. In December 2015, the Company used proceeds from its Credit Facility to prepay in full without penalty a $59.7 million 7.5% mortgage loan due March 2016. In December 2015, the Company used proceeds from its Credit Facility to satisfy $16.0 million in unsecured notes bearing interest at 3.4% due December 2015.

Leasing Activity

Leasing Activity	12 Months Ended
	Dec. 31, 2015
Operating Leases, Future Minimum Payments Receivable [Abstract]
Operating Leases of Lessor Disclosure [Text Block]	LEASING ACTIVITY Future minimum rental payments due from tenants under noncancelable operating leases as of December 31, 2015 are as follows (in thousands): 2016 $ 526,956 2017 480,827 2018 415,765 2019 348,887 2020 284,738 Thereafter 1,219,397 Total $ 3,276,570 In addition to minimum rental payments, most leases require the tenants to pay for their pro rata share of specified operating expenses. These payments are included as operating expense reimbursement in the accompanying consolidated statements of comprehensive income.

Noncontrolling Interest - Opera

Noncontrolling Interest - Operating Partnership/Limited Partners' Equity - Preferred Units	12 Months Ended
	Dec. 31, 2015
Noncontrolling Interest - Operating Partnership / LImited Partners' Equity - Preferred Units [Abstract]
Noncontrolling Interest Disclosure [Text Block]	NONCONTROLLING INTEREST - OPERATING PARTNERSHIP / LIMITED PARTNERS' EQUITY - PREFERRED UNITS As of December 31, 2015 , the Company had outstanding the following cumulative preferred units of the Operating Partnership: ISSUE AMOUNT UNITS LIQUIDATION PREFERENCE DIVIDEND RATE (in 000’s) Series I-2 $ 7,537 301 $25 6.25 % The preferred units are putable at the holder's option at any time and are callable at the Operating Partnership's option after a stated period of time for cash. Preferred distributions related to the Series I units were $472,000 for each of the years ended December 31, 2015 , 2014 and 2013 .

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2015
Shareholders' Equity [Abstract]
Stockholders' Equity Note Disclosure [Text Block]	SHAREHOLDERS' EQUITY - TRUST Common Shares The Company paid to holders of its common shares and holders of its common units distributions of $289.3 million , $286.9 million and $247.4 million during the years ended December 31, 2015 , 2014 and 2013 , respectively. On a per share basis, the Company paid common share and common unit distributions of $1.90 during each of the years ended December 31, 2015 , 2014 and 2013 . The following unaudited table summarizes the taxability of common share distributions (taxability for 2015 is estimated): 2015 2014 2013 Ordinary dividend $ 1.4348 $ 1.2556 $ 1.4312 Capital gain - 20% 0.1112 — 0.0016 IRC Sec 1250 unrecapture gain - 25% 0.3372 0.3712 0.4672 Return of capital 0.0168 0.2732 — Total $ 1.9000 $ 1.9000 $ 1.9000 The Company's tax return for the year ended December 31, 2015 has not been filed. The taxability information presented for the 2015 distributions is based upon the best available data at the time of this filing. In addition, certain of the Company's prior federal income tax returns may still be subject to examination by various taxing authorities. Because the application of tax laws and regulations is susceptible to varying interpretations, the taxability of distributions being reported here could be changed at a later date as a result of an examination and final determination by such taxing authorities. Common units The common units of the Operating Partnership not held by the Trust outstanding as of December 31, 2015 have the same economic characteristics as common shares of the Trust. The 3,539,075 outstanding common units of the Operating Partnership not held by the Trust share proportionately in the net income or loss and in any distributions of the Operating Partnership. The common units of the Operating Partnership not held by the Trust are redeemable at any time at the option of the holder. The Trust, as the sole general partner of the Operating Partnership, may at its option elect to settle the redemption in cash or through the exchange on a one -for- one basis with unregistered common shares of the Trust. The market value of the 3,539,075 outstanding common units based on the closing price of the common shares of the Company at December 31, 2015 was $ 109.9 million . No common units were issued in connection with acquisitions during 2015 , 2014 or 2013 . Preferred units The Operating Partnership had no outstanding cumulative redeemable preferred units of the Operating Partnership as of December 31, 2015 or December 31, 2014. During the year ended December 31, 2013, the Company redeemed or repurchased $20.0 million of outstanding 7.00% Series E Cumulative Redeemable Preferred Units, $17.5 million of outstanding 6.65% Series F Cumulative Redeemable Preferred Units and $27.0 million of outstanding 6.70% Series G Cumulative Redeemable Preferred Units, all at par. In connection with these redemptions and repurchases, the Company wrote off $1.2 million in origination costs. This amount was included in noncontrolling interest - operating partnership in the Trust's consolidated statements of comprehensive income. The Company paid the following Equity Preferred Unit distributions for the year ended December 31, 2013: Distributions (in millions) $1.6 Distribution per unit: Series E $1.21 Series F $1.32 Series G $1.33 As of December 31, 2015 , the Company had 16,013,000 authorized but unissued preferred shares. Dividend Reinvestment and Share Purchase Plan The Company has a Dividend Reinvestment and Share Purchase Plan under which holders of common shares may elect to automatically reinvest their distributions in additional common shares and may make optional cash payments for additional common shares. The Company may issue additional common shares or repurchase common shares in the open market for purposes of satisfying its obligations under the Dividend Reinvestment and Share Purchase Plan. During the years ended December 31, 2015 , 2014 , and 2013 , 1,036,437 , 1,643,536 , and 1,248,842 common shares, respectively, were issued through the Dividend Reinvestment and Share Purchase Plan. The Company used the proceeds to pay down outstanding borrowings under the Company's Credit Facility and for general corporate purposes. Continuous Equity Offering The Company has a continuous equity offering program in place for up to $200 million of equity. During the year ended December 31, 2013, the Company sold 1.9 million common shares through this program. The aggregate proceeds from the offering of $75.0 million were used to pay down outstanding borrowings under the Company's unsecured credit facility and for general corporate purposes. The Company did not sell any common shares pursuant to its continuous offering program during 2015 or 2014. Noncontrolling Interest - Consolidated Joint Ventures Noncontrolling interest - consolidated joint ventures includes third-party ownership interests in consolidated joint venture investments. Share Repurchase In August 2015, the Company’s Board of Trustees authorized a share repurchase plan under which the Company may purchase up to $250 million of the Company’s outstanding common shares. Purchases made pursuant to the program will be made in either the open market or in privately negotiated transactions from time to time as permitted by securities laws and other legal requirements. During the year ended December 31, 2015, the Company purchased an aggregate of 2.3 million common shares for $71.8 million as part of the share repurchase plan.

Owners' Equity - Operating Part

Owners' Equity - Operating Partnership	12 Months Ended
	Dec. 31, 2015
Liberty Property Limited Partnership [Member]
Class of Stock [Line Items]
Partners' Capital Notes Disclosure [Text Block]	OWNERS' EQUITY - OPERATING PARTNERSHIP Common Units General and limited partners' equity - common units relates to limited partnership interests of the Operating Partnership issued in connection with the formation of the Operating Partnership and certain subsequent acquisitions. The common units outstanding as of December 31, 2015 have the same economic characteristics as common shares of the Trust. The 3,539,075 outstanding common units are the limited partners' equity - common units held by persons and entities other than the Trust, the general partner of the Operating Partnership, which holds a number of common units equal to the number of outstanding common shares of beneficial interest. Both the common units held by the Trust and the common units held by persons and entities other than the Trust are counted in the weighted average number of common units outstanding during any given period. The 3,539,075 outstanding common units share proportionately in the net income or loss and in any distributions of the Operating Partnership and are exchangeable into the same number of common shares of the Trust. The market value of the 3,539,075 outstanding common units at December 31, 2015 based on the closing price of the common shares of the Company at December 31, 2015 was $ 109.9 million . No common units were issued in connection with acquisitions during 2015 , 2014 or 2013 . Preferred Units The Operating Partnership had no outstanding cumulative redeemable preferred units of the Operating Partnership as of December 31, 2015 or December 31, 2014. During the year ended December 31, 2013, the Company redeemed or repurchased $20.0 million of outstanding 7.00% Series E Cumulative Redeemable Preferred Units, $17.5 million of outstanding 6.65% Series F Cumulative Redeemable Preferred Units and $27.0 million of outstanding 6.70% Series G Cumulative Redeemable Preferred Units, all at par. In connection with these redemptions and repurchases, the Company wrote off $1.2 million in origination costs. The Operating Partnership paid the following Equity Preferred Unit distributions for the year ended December 31, 2013: Distributions (in millions) $1.6 Distribution per unit: Series E $1.21 Series F $1.32 Series G $1.33 Dividend Reinvestment and Share Purchase Plan The Company has a Dividend Reinvestment and Share Purchase Plan under which holders of common shares may elect to automatically reinvest their distributions in additional common shares and may make optional cash payments for additional common shares. The Company may issue additional common shares or repurchase common shares in the open market for purposes of satisfying its obligations under the Dividend Reinvestment and Share Purchase Plan. During the years ended December 31, 2015, 2014, and 2013, 1,036,437 , 1,643,536 , and 1,248,842 common shares, respectively, were issued through the Dividend Reinvestment and Share Purchase Plan. A corresponding number of common units were issued by the Operating Partnership. The Company used the proceeds to pay down outstanding borrowings under the Company's Credit Facility and for general corporate purposes. Continuous Equity Offering The Company has a continuous equity offering program in place for up to $200 million of equity. During year ended December 31, 2013, the Company sold 1.9 million common shares through this program. A corresponding number of common units were issued by the Operating Partnership. The aggregate proceeds from the offering of $75.0 million were used to pay down outstanding borrowings under the Company's unsecured credit facility and for general corporate purposes. The Company did not sell any common shares pursuant to its continuous offering program during 2014 or 2015. Noncontrolling Interest - Consolidated Joint Ventures Noncontrolling interest - consolidated joint ventures includes third-party ownership interests in consolidated joint venture investments. Share Repurchase In August 2015, the Company’s Board of Trustees authorized a share repurchase plan under which the Company may purchase up to $250 million of the Company’s outstanding common shares. Purchases made pursuant to the program will be made in either the open market or in privately negotiated transactions from time to time as permitted by securities laws and other legal requirements. During the year ended December 31, 2015, the Company purchased an aggregate of 2.3 million common shares for $71.8 million as part of the share repurchase plan. In connection with these repurchases, an equal number of common units were repurchased by the Operating Partnership from the Trust.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2015
Employee Benefit Plans [Abstract]
Compensation and Employee Benefit Plans [Text Block]	EMPLOYEE BENEFIT PLANS The Company maintains a 401(k) plan for the benefit of its full-time employees. The Company matches the employees' contributions up to 3% of the employees' salary and may also make annual discretionary contributions. Total 401(k) expense recognized by the Company was $1,038,000 , $943,000 and $923,000 for the years ended December 31, 2015 , 2014 and 2013 , respectively.

Share Based Compensation

Share Based Compensation	12 Months Ended
	Dec. 31, 2015
Share-based Compensation [Abstract]
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	SHARE-BASED COMPENSATION Compensation Plans The Company has a share-based compensation plan (the "Plan") which is utilized to compensate key employees and non-employee trustees. In addition, the Company has a 2008 Long-Term Incentive Plan (the "2008 Plan") which is applicable to the Company's executive officers. Pursuant to both the Plan and the 2008 Plan, grants of stock options, restricted shares and restricted stock units have been made. The Company has authorized the grant of shares and options under the Plan and the 2008 Plan of up to 21.1 million common shares of the Company. Options All options granted have a 10 -year term and most options vest and are expensed over a 3 -year period, with options to purchase up to 20% of the shares exercisable after the first anniversary, up to 50% after the second anniversary and 100% after the third anniversary of the date of grant. Share-based compensation cost related to options for the years ended December 31, 2015 , 2014 and 2013 was $1.5 million , $1.8 million and $1.6 million , respectively. The fair value of share option awards is estimated on the date of the grant using the Black-Scholes option valuation model. The following weighted-average assumptions were utilized in calculating the fair value of options granted during the periods indicated: Year Ended December 31, 2015 2014 2013 Risk-free interest rate 1.8% 1.6% 1.1% Dividend yield 5.2% 5.2% 5.4% Historical volatility factor 0.240 0.236 0.356 Weighted-average expected life 7 years 6 years 6 years The historical volatility factor is based on the Company's historical monthly share prices. The weighted-average expected life is based on the contractual term of the options as well as the historical periods held before exercise. A summary of the Company's share option activity and related information for the year ended December 31, 2015 follows: Options (000s) Weighted Average Exercise Price Outstanding January 1, 2015 2,492 $ 36.48 Granted 353 35.18 Exercised (65 ) 32.38 Forfeited (171 ) 41.53 Outstanding December 31, 2015 2,609 $ 36.08 Exercisable at December 31, 2015 1,795 $ 35.84 The weighted average fair value of options granted during the years ended December 31, 2015 , 2014 and 2013 was $4.11 , $4.09 and $7.18 , respectively. Exercise prices for options outstanding as of December 31, 2015 ranged from $20.32 to $49.74 . At December 31, 2015 , the weighted average remaining contractual life of the options outstanding and exercisable was 5.4 years and 3.9 years, respectively. During the years ended December 31, 2015 , 2014 and 2013 , the total intrinsic value of share options exercised (the difference between the market price at exercise and the price paid by the individual to exercise the option) was $364,000 , $310,000 and $4.9 million , respectively. As of December 31, 2015 , 1.7 million of the options outstanding and exercisable had an exercise price higher than the closing price of the Company's common shares and are considered to have no intrinsic value at that date. As of December 31, 2015 , 141,000 options outstanding and exercisable had an exercise price lower than the closing price of the Company's common shares. The aggregate intrinsic value of these options was $1.2 million at that date. The total cash received from the exercise of options for the years ended December 31, 2015 , 2014 and 2013 was $2.1 million , $1.4 million and $15.2 million , respectively. The Company has historically issued new shares to satisfy share option exercises. As of December 31, 2015 , there was $250,000 of unrecognized compensation costs related to nonvested options granted under the Plan and the 2008 Plan. That cost is expected to be recognized over a weighted average period of 0.8 years. Long Term Incentive Shares ("LTI") Restricted LTI share grants made under the Plan are valued at the grant date fair value, which is the market price of the underlying common shares, and vest ratably over a 5 -year period beginning with the first anniversary of the grant. During 2015 , 2014 and 2013 , the Company granted restricted stock units to the executive officers pursuant to the 2008 Plan. For the chief executive officer's award, a portion of the restricted stock units will vest up to 272% at the end of a 3 -year period for the 2015 , 2014 and 2013 awards. For the other executives, a portion of the restricted stock units will vest up to 200% at the end of a 3 -year period for the 2015 , 2014 and 2013 awards. A portion ("First Portion") of the award vests based on whether the Company's total return exceeds the average total returns of a selected group of peer companies. The grant date fair value of the First Portion was calculated based on a Monte Carlo simulation model and was determined to be 110% , 157% and 150% of the market value of a common share as of the grant date ("Market Value") for the chief executive officer and 90% , 125% and 121% of the Market Value for the other executives for the 2015 , 2014 and 2013 grants, respectively. The First Portion is amortized over the respective 3 -year period subject to certain accelerated vesting due to the age and years of service of certain executive officers. Another portion ("Second Portion") of the award vests based on the Company's funds from operations. Targets are established for each of the 3 years in the relevant award period. Depending on how each year's performance compares to the projected performance for that year, the restricted stock units are deemed earned and will vest at the end of the award period. The fair value of the Second Portion is based on the market value of a common share as of the grant date and is being amortized to expense during the period from grant date to the vesting dates, adjusting for the expected level of vesting that is anticipated to occur at those dates also subject to certain accelerated vesting provisions as described above. The key assumptions used in the Monte Carlo simulation are as follows: Year Ended December 31, 2015 2014 2013 Risk-free interest rate 0.99% 0.68% 0.35% Volatility 17% 24% 26% The volatility factor is based on the Company's historical daily share prices. Share-based compensation cost related to restricted LTI share grants for the years ended December 31, 2015 , 2014 and 2013 was $10.0 million , $9.0 million and $9.1 million , respectively. The Company's restricted LTI share activity for the year ended December 31, 2015 is as follows: Shares (000s) Weighted Avg. Grant Date Fair value Nonvested at January 1, 2015 753 $ 36.89 Granted 216 35.14 Vested (207 ) 35.61 Forfeited (39 ) 36.68 Nonvested at December 31, 2015 723 $ 36.75 The weighted average fair value of restricted shares granted during the years ended December 31, 2015 , 2014 and 2013 was $35.14 , $37.13 and $39.42 per share, respectively. As of December 31, 2015 , there was $10.3 million of total unrecognized compensation cost related to nonvested shares granted under the Plan. That cost is expected to be recognized over a weighted average period of 1.2 years. The total fair value of restricted shares vested during the years ended December 31, 2015 , 2014 and 2013 was $7.4 million , $9.3 million and $9.9 million , respectively. Bonus Shares The Plan provides that employees of the Company may elect to receive bonuses or commissions in the form of common shares in lieu of cash ("Bonus Shares"). By making such election, the employee receives shares equal to 120% of the cash value of the bonus or commission, less applicable withholding tax. Bonus Shares issued for the years ended December 31, 2015 , 2014 and 2013 were 111,700 , 103,834 and 79,271 , respectively. Share-based compensation cost related to Bonus Shares for the years ended December 31, 2015 , 2014 and 2013 was $3.9 million , $3.9 million and $3.1 million , respectively. Profit Sharing Plan The Plan provides that employees of the Company, below the officer level, may receive up to 5% of base pay in the form of cash contributions to an investment account depending on Company performance. Compensation cost related to the profit sharing plan for the years ended December 31, 2015 , 2014 and 2013 was $965,000 , $543,000 and $698,000 respectively. An additional 5,574,605 , 6,100,098 and 6,637,761 common shares were reserved for issuance for future grants under the Plan and the 2008 Plan at December 31, 2015 , 2014 and 2013 , respectively. Employee Share Purchase Plan The Company registered 750,000 common shares under the Securities Act of 1933, as amended, in connection with an employee share purchase plan ("ESPP"). The ESPP enables eligible employees to purchase shares of the Company, in amounts up to 10% of the employee's salary, at a 15% discount to fair market value. There were 13,127 , 12,612 and 16,793 shares issued, in accordance with the ESPP, during the years ended December 31, 2015 , 2014 and 2013 , respectively. Share-based compensation cost related to the ESPP for the years ended December 31, 2015 , 2014 and 2013 was $62,000 , $104,000 and $71,000 , respectively.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Environmental Matters Substantially all of the Company's properties and land were subject to Phase I Environmental Assessments and when appropriate Phase II Environmental Assessments (collectively, the “Environmental Assessments”) obtained in contemplation of their acquisition by the Company or obtained by predecessor owners prior to the sale of the property or land to the Company. The Environmental Assessments did not reveal, nor is the Company aware of, any non-compliance with environmental laws, environmental liability or other environmental claim that the Company believes would likely have a material adverse effect on the Company. Operating Ground Lease Agreements Future minimum rental payments under the terms of all non-cancelable operating ground leases under which the Company is the lessee, as of December 31, 2015 , were as follows (in thousands): Year Amount 2016 $ 1,038 2017 1,038 2018 1,038 2019 1,038 2020 1,038 2021 though 2034 6,754 Total $ 11,944 Operating ground lease expense incurred by the Company during the years December 31, 2015 , 2014 and 2013 totaled $815,000 , $454,000 and $210,000 , respectively. Legal Matters From time to time, the Company is a party to a variety of legal proceedings, claims and assessments arising in the normal course of business. The Company believes that as of December 31, 2015 there were no legal proceedings, claims or assessments expected to have a material adverse effect on the Company’s business or financial statements. Other As of December 31, 2015 , the Company had letter of credit obligations of $5.9 million related to mortgages and development requirements. The Company believes that it is remote that there will be a draw upon these letter of credit obligations. As of December 31, 2015 , the Company had 27 buildings under development. These buildings are expected to contain a total of 6.8 million square feet of leaseable space and represent an anticipated aggregate investment of $672.0 million . At December 31, 2015 , Development in Progress totaled $360.9 million . In addition, as of December 31, 2015 , the Company had invested $16.1 million in deferred leasing costs related to these development buildings. As of December 31, 2015 , the Company was committed to $42.0 million in improvements on certain buildings and land parcels. As of December 31, 2015 , the Company was obligated to pay for tenant improvements not yet completed for a maximum of $53.5 million . As of December 31, 2015 , the Company was committed to $31.9 million in future land purchases. The Company expects to complete these purchases during the year ended December 31, 2016. As of December 31, 2015, the Company was committed to fund up to $4 million for tenant improvements and leasing commissions under a loan to the buyer of properties in the Company's Southeastern PA reportable segment. The Company maintains cash and cash equivalents at financial institutions. The combined account balances at each institution typically exceed FDIC insurance coverage and, as a result, there is a concentration of credit risk related to amounts on deposit in excess of FDIC insurance coverage. The Company believes the risk is not significant.

Quarterly Results of Operations

Quarterly Results of Operations	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information [Text Block]	QUARTERLY RESULTS OF OPERATIONS (UNAUDITED) A summary of quarterly results of operations for the years ended December 31, 2015 and 2014 follows. QUARTER ENDED DEC. 31, SEPT. 30, JUNE 30, MAR. 31, DEC. 31, SEPT. 30, JUNE 30, MAR. 31, 2015 2015 2015 2015 2014 2014 2014 2014 Operating revenue $ 199,382 $ 198,972 $ 203,518 $ 206,901 $ 203,685 $ 198,356 $ 192,960 $ 197,630 Income from continuing operations 82,363 93,695 36,526 31,862 84,193 35,318 29,811 26,260 Discontinued operations — — — — 306 133 296 47,846 Net income 82,363 93,695 36,526 31,862 84,499 35,451 30,107 74,106 Income per common share - basic (1) 0.55 0.61 0.24 0.21 0.56 0.23 0.20 0.49 Income per common share - diluted (1) 0.55 0.61 0.24 0.21 0.55 0.23 0.20 0.49 (1) The sum of quarterly financial data may vary from the annual data due to rounding.

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Segment Reporting Disclosure [Text Block]	SEGMENT INFORMATION The Company owns and operates industrial properties nationally and owns and operates office properties in a focused group of office markets. Additionally, the Company owns certain assets in the United Kingdom. At December 31, 2015 , the Company's reportable segments were based on the Company's method of internal reporting and were as follows: • Carolinas; • Chicago/Milwaukee; • Houston; • Lehigh/Central PA; • Minnesota; • Orlando; • Philadelphia; • Richmond/Hampton Roads; • Southeastern PA; • South Florida; • Tampa; and • United Kingdom. Certain other segments are aggregated into an "Other" category which includes the reportable segments: Arizona; Atlanta; Cincinnati/Columbus/Indianapolis; Dallas; Maryland; New Jersey; Northern Virginia; Southern California; Washington D.C. and other. The Company evaluates the performance of its reportable segments based on net operating income. Net operating income includes operating revenue from external customers, real estate taxes, amortization of lease transaction costs and other operating expenses which relate directly to the management and operation of the assets within each reportable segment. The Company's accounting policies for the segments are the same as those used in the Company's consolidated financial statements. There are no material inter-segment transactions. The operating information by reportable segment is as follows (in thousands): Year ended December 31, 2015 2014 2013 Operating revenue Carolinas $ 40,917 $ 35,870 $ 30,243 Chicago/Milwaukee 37,431 33,068 18,083 Houston 54,031 49,309 37,773 Lehigh/Central PA 133,473 118,145 101,101 Minnesota 47,932 54,892 62,415 Orlando 21,802 32,674 31,400 Philadelphia 40,490 35,238 31,690 Richmond/Hampton Roads 31,033 40,911 40,247 South Florida 50,638 48,804 38,464 Southeastern PA 147,712 148,714 165,248 Tampa 54,744 53,725 52,230 United Kingdom 15,135 16,360 7,669 Other 133,345 130,013 142,402 Segment-level operating revenue 808,683 797,723 758,965 Reconciliation to total operating revenues Discontinued operations — (4,728 ) (113,586 ) Other 90 (364 ) 551 Total operating revenue $ 808,773 $ 792,631 $ 645,930 Net operating income Carolinas $ 28,594 $ 24,578 $ 20,434 Chicago/Milwaukee 24,851 20,856 11,726 Houston 31,159 29,134 22,632 Lehigh/Central PA 94,972 82,050 68,504 Minnesota 20,112 26,464 30,016 Orlando 14,842 21,472 20,506 Philadelphia 29,679 26,722 23,587 Richmond/Hampton Roads 19,255 24,357 24,063 South Florida 28,308 27,947 20,943 Southeastern PA 80,458 81,183 91,193 Tampa 34,133 33,776 33,042 United Kingdom 10,486 10,704 2,597 Other 87,925 83,991 81,435 Segment-level net operating income 504,774 493,234 450,678 Reconciliation to income from continuing operations Interest expense (1) (135,779 ) (152,444 ) (143,018 ) Depreciation/amortization expense (1) (2) (166,500 ) (177,715 ) (138,128 ) Impairment - real estate assets (18,244 ) (117 ) (248 ) Gain on property dispositions 100,314 45,147 — Equity in earnings of unconsolidated joint ventures 3,149 10,314 6,067 General and administrative expense (1) (2) (44,529 ) (38,041 ) (50,998 ) Discontinued operations excluding gain on property dispositions — (1,950 ) (26,455 ) Income taxes (2) (2,911 ) (2,781 ) (2,748 ) Other 4,172 (65 ) 2,605 Income from continuing operations $ 244,446 $ 175,582 $ 97,755 (1) Includes activity on discontinued operations. (2) Excludes costs which are included in determining segment-level net operating income. The amount of depreciation and amortization expense related to tenant improvement and lease transaction costs within each reporting segment for the Net operating income calculation is as follows (in thousands): Year ended December 31, 2015 2014 2013 Carolinas $ 2,413 $ 2,329 $ 1,935 Chicago/Milwaukee 1,161 466 251 Houston 4,466 3,988 3,200 Lehigh/Central PA 11,641 10,157 9,781 Minnesota 4,986 4,478 5,797 Orlando 1,963 3,116 3,037 Philadelphia 2,220 1,803 1,729 Richmond/Hampton Roads 2,894 4,278 4,156 South Florida 3,572 2,824 2,979 Southeastern PA 12,346 12,272 15,040 Tampa 3,872 3,384 3,033 United Kingdom 292 177 172 Other 8,249 5,631 13,439 Depreciation and amortization of tenant improvement and lease transaction costs $ 60,075 $ 54,903 $ 64,549 The Company's operating revenue by product type and by reportable segment for the years ended December 31, 2015 , 2014 and 2013 is as follows (in thousands): Year Ended December 31, 2015 December 31, 2014 December 31, 2013 Industrial Office Total Industrial Office Total Industrial Office Total Carolinas $ 40,917 $ — $ 40,917 $ 35,870 $ — $ 35,870 $ 30,243 $ — $ 30,243 Chicago/Milwaukee 37,431 — 37,431 33,068 — 33,068 18,083 — 18,083 Houston 53,802 229 54,031 49,309 — 49,309 37,773 — 37,773 Lehigh/Central PA 131,168 2,305 133,473 115,821 2,324 118,145 98,715 2,386 101,101 Minnesota 24,721 23,211 47,932 25,378 29,514 54,892 32,043 30,372 62,415 Orlando 20,056 1,746 21,802 18,635 14,039 32,674 16,535 14,865 31,400 Philadelphia 11,809 28,681 40,490 10,072 25,166 35,238 9,534 22,156 31,690 Richmond/Hampton Roads 21,158 9,875 31,033 20,924 19,987 40,911 19,073 21,174 40,247 South Florida 20,740 29,898 50,638 18,603 30,201 48,804 7,955 30,509 38,464 Southeastern PA 28,457 119,255 147,712 28,895 119,819 148,714 27,076 138,172 165,248 Tampa 26,353 28,391 54,744 25,451 28,274 53,725 24,331 27,899 52,230 United Kingdom 12,104 3,031 15,135 13,090 3,270 16,360 4,205 3,464 7,669 Other (1) 86,180 47,165 133,345 82,672 47,341 130,013 43,355 99,047 142,402 $ 514,896 $ 293,787 808,683 $ 477,788 $ 319,935 797,723 $ 368,921 $ 390,044 758,965 Reconciliation to total operating revenue Discontinued operations — (4,728 ) (113,586 ) Corporate other 90 (364 ) 551 Total operating revenue $ 808,773 $ 792,631 $ 645,930 (1) A substantial portion of the buildings contributing to office operating revenue in 2013 were sold in conjunction with the Portfolio Sale. See Footnote 19. The Company's total assets by reportable segment as of December 31, 2015 and 2014 is as follows (in thousands): As of December 31, 2015 2014 Carolinas $ 338,273 $ 325,690 Chicago/Milwaukee 429,390 422,531 Houston 522,285 418,154 Lehigh/Central PA 1,157,468 1,023,641 Minnesota 346,840 333,506 Orlando 138,181 160,899 Philadelphia 444,889 366,243 Richmond/Hampton Roads 128,825 250,205 South Florida 409,501 400,034 Southeastern PA 448,523 698,163 Tampa 326,670 335,652 United Kingdom 215,850 231,271 Other 1,586,481 1,553,250 Segment-level total assets 6,493,176 6,519,239 Corporate Other 64,453 92,775 Total assets $ 6,557,629 $ 6,612,014 The Company's real estate assets by reportable segment as of December 31, 2015 and 2014 is as follows (in thousands): As of December 31, 2015 2014 Carolinas $ 322,707 $ 309,822 Chicago/Milwaukee 387,182 383,494 Houston 483,432 398,080 Lehigh/Central PA 1,096,195 958,886 Minnesota 322,627 302,830 Orlando 119,356 139,218 Philadelphia 282,159 255,313 Richmond/Hampton Roads 123,641 238,670 South Florida 389,534 378,398 Southeastern PA 410,195 636,280 Tampa 306,822 317,106 United Kingdom 174,390 182,588 Other 1,447,322 1,391,744 Total real estate assets $ 5,865,562 $ 5,892,429 The Company incurred the following costs related to its long-lived assets for the years ended December 31, 2015 , 2014 and 2013 (in thousands): Year Ended December 31, 2015 2014 2013 Costs incurred on long-lived assets Carolinas $ 21,993 $ 72,252 $ 15,582 Chicago/Milwaukee 13,483 21,698 248,640 Houston 96,681 70,903 116,024 Lehigh/Central PA 165,319 105,725 161,925 Minnesota 41,259 28,966 38,434 Orlando 5,344 7,827 10,953 Philadelphia 34,122 32,012 17,941 Richmond/Hampton Roads 9,182 10,348 15,880 South Florida 34,089 30,063 148,165 Southeastern PA 9,047 39,638 39,590 Tampa 4,161 7,262 28,655 United Kingdom 12,960 16,298 155,829 Other 125,412 172,495 897,831 Total costs incurred on long-lived assets $ 573,052 $ 615,487 $ 1,895,449

Accounting for the Impairment o

Accounting for the Impairment or Disposal of Long-Lived Assets	12 Months Ended
	Dec. 31, 2015
Accounting for the Impairment or Disposal of Long-Lived Assets [Abstract]
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]	ACCOUNTING FOR THE IMPAIRMENT OR DISPOSAL OF LONG-LIVED ASSETS In November 2013, the Company entered into an Agreement of Sale and Purchase pursuant to which the Company agreed to sell 97 operating properties containing an aggregate of 6.6 million square feet and 159 acres of land for $697.3 million (the "Portfolio Sale"). In December 2013, the Company closed on the first of two planned settlements under this agreement. The proceeds from the first settlement were $367.7 million and included 49 properties totaling approximately 4.0 million square feet of space and 140 acres of land. In January 2014, the Company closed on the remaining settlement for proceeds of $329.6 million which consisted of 23 properties totaling 1.4 million square feet and 19 acres of land in the Maryland reportable segment, 24 properties and 1.2 million square feet in the New Jersey reportable segment and one property totaling 37,000 square feet in the Company's Southeastern PA reportable segment. All of the operating properties in the Portfolio Sale were considered held for sale as of December 31, 2013. Prior to the adoption of Accounting Standards Update 2014-08, Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360), Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity ("ASU 2014-08") on January 1, 2014, the results of operations for all operating properties sold or held for sale during the reported periods were shown under discontinued operations on the consolidated statements of comprehensive income. Under ASU 2014-08, operating properties that were sold or classified as held for sale before the adoption of ASU 2014-08 continue to be classified as discontinued operations. Accordingly, operating properties previously reported as discontinued operations (including the Portfolio Sale) will continue to be presented as discontinued operations on the consolidated statements of comprehensive income for all periods presented. Under ASU 2014-08, a disposal of a component of an entity or a group of components of an entity is required to be reported in discontinued operations if the disposal represents a strategic shift that has (or will have) a major effect on an entity's operations and financial results when the component or group of components meets the criteria to be classified as held for sale or when the component or group of components is disposed of by sale or other than by sale. The proceeds from the disposition of properties excluding the Portfolio Sale that were included in discontinued operations were $136.7 million for the year ended December 31, 2013. A summary of the results of operations for the properties classified as discontinued operations through the respective disposition dates is as follows (in thousands): For the Year Ended December 31, 2015 2014 2013 Revenues $ — $ 4,728 $ 113,586 Operating expenses — (2,258 ) (41,875 ) Interest and other income — 37 213 Interest expense — (557 ) (15,903 ) Depreciation and amortization — — (29,566 ) Income before gain on property dispositions — 1,950 26,455 Gain on property dispositions — 46,631 95,384 Net income $ — $ 48,581 $ 121,839 Interest expense has been allocated to discontinued operations. The allocation of interest expense to discontinued operations was based on the ratio of net assets sold and held for sale (without continuing involvement) to the sum of total net assets plus consolidated debt. One property totaling 92,000 square feet in the Company’s Minnesota reportable segment was considered held for sale as of December 31, 2015 . Under ASU 2014-08, this property has not been classified as discontinued operations.
Asset Impairment Charges [Text Block]	Asset Impairment The Company disposes of and anticipates the potential disposition of certain properties prior to the end of their remaining useful lives. During the years ended December 31, 2015 , 2014 and 2013 , the Company recognized impairment losses of $18.2 million , $0.1 million and $1.1 million , respectively. These totals include the Company's share of certain impairment losses recognized by unconsolidated joint ventures in which the Company held an interest. The impairment losses are for operating properties or land parcels and were in the reportable segments and for the amounts as indicated below (in thousands): Year Ended December 31, Reportable Segment 2015 2014 2013 Richmond/Hampton Roads $ 13,755 $ — $ — Southeastern PA 2,328 106 Tampa — — 248 United Kingdom — — — Other 2,161 11 872 Total $ 18,244 $ 117 $ 1,120 For the year ended December 31, 2015, $18.2 million in impairments were included in impairment - real estate assets in the Company's consolidated statements of comprehensive income. For the year ended December 31, 2014, $0.1 million in impairments were included in impairment - real estate assets in the Company's consolidated statements of comprehensive income. For the year ended December 31, 2013 , $0.9 million in impairments were included in discontinued operations and $0.2 million in impairments were included in impairment - real estate assets in the Company's consolidated statements of comprehensive income. The Company determined these impairments based on third party offer prices and quoted offer prices for comparable transactions which are Level 2 and Level 3 inputs, respectively, according to the fair value hierarchy established in ASC 820. These measurements have occurred throughout the respective periods as circumstances arise, and the resulting estimates of fair value are not necessarily reflective of measurements at the period’s end. The Company has evaluated each of the properties and land held for development and has determined that there are no additional valuation adjustments necessary at December 31, 2015 .

Business Combination

Business Combination	12 Months Ended
	Dec. 31, 2015
Business Acquisition [Line Items]
Business Combination	BUSINESS COMBINATION On October 8, 2013 , the Company acquired all of the outstanding general and limited partnership interests of Cabot Industrial Fund III Operating Partnership, L.P. , a Delaware limited partnership (the "Cabot Acquisition"). The acquisition resulted in the purchase of a 100% ownership interest in 177 industrial assets totaling approximately 23.0 million square feet. The purchase price for the Cabot Acquisition was $1.469 billion , which was paid through the assumption of approximately $229.8 million of mortgage debt and the remainder in cash. The Company funded the cash portion of the acquisition consideration through a combination of proceeds from an August 2013 equity offering, proceeds from a September 2013 offering of senior notes and draws under its Credit Facility. The following table summarizes the estimated fair values of the assets acquired and liabilities assumed at the acquisition date. Assets Real estate: Land and land improvements $ 247,393 Building and improvements 1,152,717 Operating real estate 1,400,110 Intangible - in-place leases/market rent 97,396 Other assets 4,953 Total assets 1,502,459 Liabilities Mortgage loans 243,230 Other liabilities 32,958 Intangible - market rent 5,737 Total liabilities 281,925 Net assets acquired $ 1,220,534 The weighted average amortization period of the in-place lease intangibles is 4.4 years. Costs incurred in conjunction with the Cabot Acquisition and related funding include the following: • $7.6 million of acquisition costs in the year ended December 31, 2013 (included in general and administrative expenses on the Company’s consolidated statements of comprehensive income) and $4.2 million in financing fees in the year ended December 31, 2013 (included in interest expense in the Company’s consolidated statements of comprehensive income). • Deferred financing costs of approximately $2.0 million associated with the assumption of $229.8 million in mortgage debt ( $243.2 million fair value) assumed at closing. • Deferred financing costs of $3.9 million incurred in conjunction with the financing of the September 27, 2013 $450.0 million senior unsecured notes offering (included in unsecured notes in the Company’s consolidated balance sheets with amortization reflected in interest expense over the life of the related notes in the Company’s consolidated statements of comprehensive income). • Costs of $35.3 million incurred in conjunction with the August 7, 2013 issuance of 24.2 million of the Company’s common shares (included as a reduction to equity in the Company’s consolidated balance sheets). The Company recognized $31.4 million of operating revenue and $22.0 million of net operating income (see description of net operating income in Footnote 18 - Segment Information) related to the properties acquired in the Cabot Acquisition during 2013. The following unaudited pro forma condensed income statement information has been prepared as if the Cabot Acquisition, the Trust’s August 2013 common share offering and the Operating Partnership’s September 2013 senior note offering had been completed on January 1, 2013. The pro forma condensed consolidated financial information does not purport to represent what the Company’s results of operations would have been assuming the completion of the Cabot Acquisition and the related financing activities had occurred on January 1, 2013 nor do they purport to project the results of operations of the Company for any future period (in thousands): For the Year Ended December 31, 2013 Total operating revenue $ 750,896 Net income available to common shareholders $ 211,601 These amounts have been calculated after applying the Company's accounting policies and adjusting the results of the Cabot Acquisition to reflect the additional depreciation and amortization that would have been charged assuming the fair value adjustments to building and improvements and in-place lease intangibles had been applied on January 1, 2013.

Derivative Instruments

Derivative Instruments	12 Months Ended
	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	DERIVATIVE INSTRUMENTS In connection with the Cabot acquisition, the Company assumed the seller’s interest in three interest rate swap contracts (“Swaps”) that eliminate the impact of changes in interest rates on the payments required under variable rate mortgages that were also assumed. The Swaps had an aggregate notional amounts of $101.4 million and $103.6 million at December 31, 2015 and 2014 , respectively, and expire at various dates between 2018 and 2020 . The Company designated the Swaps as cash flow hedges on November 22, 2013 . The change in the fair value of the Swaps from October 8, 2013 through November 22, 2013 in the amount of $813,000 is included as an increase in interest expense in the accompanying consolidated statements of comprehensive income. The Company accounts for the effective portion of changes in the fair value of a derivative in accumulated other comprehensive loss and subsequently reclassifies the effective portion to earnings over the term that the hedged transaction affects earnings. The Company accounts for the ineffective portion of changes in the fair value of a derivative directly in earnings. The following table presents the location in the financial statements of the gains or losses recognized related to the Company’s cash flow hedges for the year ended December 31, 2015 and 2014 and from November 22, 2013 to December 31, 2013 (in thousands): Year Ended November 22, 2013 - December 31, 2013 December 31, 2015 December 31, 2014 Amount of (loss) gain related to the effective portion recognized in other comprehensive (loss) income $ (1,884 ) $ (3,400 ) $ 1,600 Amount of loss related to the effective portion reclassified to interest expense $ (1,396 ) $ (1,500 ) $ — Amount of (loss) gain related to the ineffective portion recognized in interest expense $ (91 ) $ (82 ) $ 266 The fair value of the interest rate swaps in the amount of $7.1 million and $8.5 million as of December 31, 2015 and 2014 , respectively, is included in other liabilities in the accompanying consolidated balance sheets. The Company estimates that $0.9 million will be reclassified from accumulated other comprehensive income as an increase to interest expense over the next twelve months. The Company has agreements with its derivative counterparties that contain a provision whereby if the Company defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then the Company could also be declared in default on its derivative obligations. If the Company were to breach any of the contractual provisions of the derivative contracts, it would be required to settle its obligations under the agreements at their termination value including accrued interest for approximately $7.2 million .

Supplemental Disclosure to Stat

Supplemental Disclosure to Statements of Cash Flows	12 Months Ended
	Dec. 31, 2015
Supplemental Disclosure to Statements of Cash Flows [Abstract]
Supplemental Disclosure to Statements of Cash Flows	SUPPLEMENTAL DISCLOSURE TO CONSOLIDATED STATEMENT OF CASH FLOWS The following are supplemental disclosures to the statements of cash flows for the years ended December 31, 2015 , 2014 and 2013 (amounts in thousands): 2015 2014 2013 Write-off of fully depreciated/amortized property and deferred costs $ 42,339 $ 38,131 $ 22,269 Write-off of depreciated property and deferred costs due to sale/demolition 252,017 173,083 202,695 Write-off of preferred units costs due to redemption — — 1,214 Assumption of mortgage loans in connection with the acquisition of properties — — 229,751 Increase in investments in and advances to unconsolidated joint ventures due to disposition/development activity — (11,948 ) — Changes in accrued development capital expenditures 11,964 6,264 17,053 Unrealized (loss) gain on cash flow hedge (488 ) (3,419 ) 1,584 Amounts paid in cash for deferred leasing costs incurred in connection with signed leases with tenants are paid in conjunction with improving (acquiring) property, plant and equipment. Such costs are not contained within net real estate. However, they are integral to the completion of a tenant lease and ultimately are related to the improvement and thus the value of the Company’s property, plant and equipment. They are therefore included in investing activities in the Company’s consolidated statements of cash flows.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2015
Subsequent Event [Line Items]
Subsequent Events [Text Block]	SUBSEQUENT EVENTS From January 1, 2016 to February 26, 2016, the Company purchased an aggregate of 1.4 million common shares for $40.9 million as part of the Company's share repurchase plan.

Schedule II

Schedule II	12 Months Ended
	Dec. 31, 2015
Valuation and Qualifying Accounts [Abstract]
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]	The following table details the activity for the allowance for doubtful accounts. Balance at December 31, 2014 Additions Deductions Balance at December 31, 2015 Allowance for Doubtful Accounts - Straight Line Rent $ 910 $ 1,233 $ (1,562 ) $ 581 Allowance for Doubtful Accounts - Accounts Receivable 6,490 4,246 (4,419 ) 6,317 Total $ 7,400 $ 5,479 $ (5,981 ) $ 6,898 Balance at December 31, 2013 Additions Deductions Balance at December 31, 2014 Allowance for Doubtful Accounts - Straight Line Rent $ 823 $ 1,097 $ (1,010 ) $ 910 Allowance for Doubtful Accounts - Accounts Receivable 6,938 3,886 (4,334 ) 6,490 Total $ 7,761 $ 4,983 $ (5,344 ) $ 7,400 Balance at December 31, 2012 Additions Deductions Balance at December 31, 2013 Allowance for Doubtful Accounts - Straight Line Rent $ 798 $ 815 $ (790 ) $ 823 Allowance for Doubtful Accounts - Accounts Receivable 6,216 2,505 (1,783 ) 6,938 Total $ 7,014 $ 3,320 $ (2,573 ) $ 7,761

Schedule III

Schedule III	12 Months Ended
	Dec. 31, 2015
Schedule III [Abstract]
Real Estate and Accumulated Depreciation Disclosure [Text Block]	LIBERTY PROPERTY TRUST AND LIBERTY PROPERTY LIMITED PARTNERSHIP SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION AS OF DECEMBER 31, 2015 Initial Cost Gross Amount Carried at End of Period Project Location Encumbrances (1) Land Building Costs Capitalized Subsequent to Acquisition (2) Land and Improvements Building and Improvements Total 12/31/2015 Accumulated Depreciation 12/31/2015 Date of Construction or Acquisition Depreciable life (years) OPERATING PROPERTIES 1467 Perryman Road Aberdeen, MD $ — $ 12,052,635 $ — $ 35,346,705 $ 12,334,030 $ 35,065,310 $ 47,399,340 $ 1,369,265 2014 5 - 40 1501 Perryman Road Aberdeen, MD — 5,813,324 18,874,059 5,422,539 5,816,839 24,293,083 30,109,922 5,910,950 2005 5 - 40 869 S Route 53 Addison, IL — 1,194,223 4,201,881 61,258 1,194,223 4,263,140 5,457,363 297,229 2013 5 - 40 901 S Route 53 Addison, IL — 2,055,066 5,984,093 661,947 2,055,066 6,646,040 8,701,106 431,780 2013 5 - 40 200 Boulder Drive Allentown, PA — 4,722,683 18,922,645 902,672 4,722,683 19,825,317 24,548,000 5,621,980 2004 5 - 40 250 Boulder Drive Allentown, PA — 3,599,936 12,099,145 2,149,322 3,717,733 14,130,670 17,848,403 4,657,632 2004 5 - 40 400 Nestle Way Allentown, PA — 8,065,500 — 27,960,348 8,184,096 27,841,752 36,025,848 14,183,487 1997 5 - 40 650 Boulder Drive Allentown, PA — 5,208,248 — 32,159,603 9,961,788 27,406,063 37,367,851 9,049,776 2002 5 - 40 651 Boulder Drive Allentown, PA — 4,308,646 — 17,738,622 4,308,646 17,738,622 22,047,268 8,117,529 2000 5 - 40 700 Nestle Way Allentown, PA — 3,473,120 — 20,186,320 4,174,970 19,484,470 23,659,440 10,049,517 1998 5 - 40 705 Boulder Drive Allentown, PA — 10,594,027 — 28,652,353 10,596,767 28,649,613 39,246,380 12,616,449 2001 5 - 40 7165 Ambassador Drive Allentown, PA — * 792,999 — 4,644,609 804,848 4,632,760 5,437,608 1,884,477 2002 5 - 40 7248 Industrial Boulevard Allentown, PA — 2,670,849 13,307,408 4,712,185 2,670,673 18,019,769 20,690,442 8,443,302 1988 5 - 40 7339 Industrial Boulevard Allentown, PA — 1,187,776 — 7,592,257 1,197,447 7,582,586 8,780,033 3,650,841 1996 5 - 40 7437 Industrial Boulevard Allentown, PA — 717,488 5,022,413 3,377,718 726,651 8,390,967 9,117,618 4,969,096 1976 5 - 40 8014 Industrial Boulevard Allentown, PA — 4,019,258 — 9,909,602 3,645,117 10,283,743 13,928,860 4,893,825 1999 5 - 40 8150 Industrial Boulevard Allentown, PA — 2,564,167 — 9,396,095 2,571,466 9,388,796 11,960,262 3,148,626 2002 5 - 40 8250 Industrial Boulevard Allentown, PA — 1,025,667 — 5,082,558 1,035,854 5,072,371 6,108,225 1,696,937 2002 5 - 40 8400 Industrial Boulevard Allentown, PA — 6,725,948 — 27,161,555 7,521,211 26,366,292 33,887,503 6,758,180 2005 5 - 40 6330 Hedgewood Drive Allentown, PA — 531,268 — 6,060,145 532,047 6,059,366 6,591,413 3,620,745 1988 5 - 40 6350 Hedgewood Drive Allentown, PA — 360,027 — 4,526,060 560,691 4,325,396 4,886,087 2,309,215 1989 5 - 40 6370 Hedgewood Drive Allentown, PA — 540,795 — 4,019,260 541,459 4,018,596 4,560,055 2,279,429 1990 5 - 40 6390 Hedgewood Drive Allentown, PA — 707,203 — 3,018,919 707,867 3,018,255 3,726,122 1,813,455 1990 5 - 40 6520 Stonegate Drive Allentown, PA — 453,315 — 1,873,771 484,361 1,842,725 2,327,086 992,068 1996 5 - 40 6540 Stonegate Drive Allentown, PA — 422,042 — 4,073,406 422,730 4,072,718 4,495,448 2,759,797 1988 5 - 40 6560 Stonegate Drive Allentown, PA — 458,281 — 2,858,752 458,945 2,858,088 3,317,033 1,969,167 1989 5 - 40 6580 Snowdrift Road Allentown, PA — 388,328 — 4,876,767 389,081 4,876,014 5,265,095 2,828,651 1988 5 - 40 7620 Cetronia Road Allentown, PA — 1,091,806 3,851,456 445,980 1,093,724 4,295,518 5,389,242 2,148,035 1990 5 - 40 3095 Presidential Drive Atlanta, GA — 200,351 1,729,161 216,941 200,351 1,946,102 2,146,453 148,824 2013 5 - 40 LIBERTY PROPERTY TRUST AND LIBERTY PROPERTY LIMITED PARTNERSHIP SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION AS OF DECEMBER 31, 2015 Initial Cost Gross Amount Carried at End of Period Project Location Encumbrances (1) Land Building Costs Capitalized Subsequent to Acquisition (2) Land and Improvements Building and Improvements Total 12/31/2015 Accumulated Depreciation 12/31/2015 Date of Construction or Acquisition Depreciable life (years) OPERATING PROPERTIES 3097 Presidential Drive Atlanta, GA — 188,680 1,721,048 86,553 188,680 1,807,601 1,996,281 148,512 2013 5 - 40 7030 Buford Highway NE Atlanta, GA — * 919,850 4,051,340 940,852 919,850 4,992,192 5,912,042 428,292 2013 5 - 40 Barton 150 Barton Under Needwood, UK — 2,196,955 13,643,981 (1,742,245 ) 1,955,326 12,143,365 14,098,691 786,014 2013 5 - 40 1055-1071 Kingsland Drive Batavia, IL — 727,294 2,367,529 326,403 727,294 2,693,932 3,421,226 235,638 2013 5 - 40 4606 Richlynn Drive Belcamp, MD — 299,600 1,818,861 712,788 299,600 2,531,649 2,831,249 1,041,001 1985 5 - 40 11800 Baltimore Avenue Beltsville,MD — 2,769,962 1,829,028 373,362 2,769,962 2,202,391 4,972,353 208,719 2013 5 - 40 11850 Baltimore Avenue Beltsville,MD — 3,595,044 2,415,132 277,582 3,595,044 2,692,714 6,287,758 333,699 2013 5 - 40 11900 Baltimore Avenue Beltsville,MD — 3,492,036 2,024,038 480,354 3,492,036 2,504,392 5,996,428 358,357 2013 5 - 40 12104 Indian Creek Court Beltsville,MD — 2,021,752 2,503,802 391,474 2,021,752 2,895,276 4,917,028 397,647 2013 5 - 40 12200 Indian Creek Court Beltsville,MD — 1,347,882 1,460,291 612,557 1,347,882 2,072,848 3,420,730 157,679 2013 5 - 40 12240 Indian Creek Court Beltsville,MD — 1,479,307 2,159,997 552,121 1,479,307 2,712,119 4,191,426 211,434 2013 5 - 40 1071 Thorndale Avenue Bensenville,IL — 2,173,006 2,280,788 174,978 2,016,715 2,612,057 4,628,772 247,640 2013 5 - 40 1260-1274 Ellis Street Bensenville,IL — * 2,298,560 4,020,382 360,126 2,298,560 4,380,508 6,679,068 403,950 2013 5 - 40 371-377 Meyer Road Bensenville,IL — * 1,903,423 3,563,953 301,673 1,903,423 3,865,626 5,769,049 360,978 2013 5 - 40 850-880 Devon Ave Bensenville,IL — * 2,958,756 7,959,013 693,361 2,958,756 8,652,374 11,611,130 709,605 2013 5 - 40 10 Emery Street Bethlehem, PA — 5,591,216 32,941,818 7,229,427 8,945,327 36,817,134 45,762,461 1,410,917 2014 5 - 40 2785 Commerce Center Boulevard Bethlehem, PA — 11,961,623 — 46,707,077 12,009,985 46,658,715 58,668,700 3,031,218 2011 5 - 40 74 West Broad Street Bethlehem, PA — 1,096,127 — 14,540,256 1,099,079 14,537,304 15,636,383 6,410,073 2002 5 - 40 10801 Nesbitt Avenue South Bloomington, MN — 784,577 — 5,010,219 786,382 5,008,414 5,794,796 1,851,425 2001 5 - 40 5705 Old Shakopee Road Bloomington, MN — 2,113,223 — 6,276,164 2,148,571 6,240,816 8,389,387 2,115,865 2001 5 - 40 5715 Old Shakopee Road West Bloomington, MN — 1,263,226 2,360,782 2,316,756 1,264,758 4,676,006 5,940,764 1,939,380 2002 5 - 40 5735 Old Shakopee Road West Bloomington, MN — 1,263,226 2,360,782 1,006,356 1,264,758 3,365,606 4,630,364 1,105,007 2002 5 - 40 5775 West Old Shakopee Road Bloomington, MN — 2,052,018 3,849,649 1,676,375 2,060,644 5,517,398 7,578,042 2,251,291 2002 5 - 40 6161 Green Valley Drive Bloomington, MN — 740,378 3,311,602 1,680,574 709,961 5,022,593 5,732,554 2,271,251 1992 5 - 40 6601-6625 W. 78th Street Bloomington, MN — 2,263,060 — 42,098,480 2,310,246 42,051,294 44,361,540 17,834,890 1998 5 - 40 750 Park of Commerce Boulevard Boca Raton, FL — 2,430,000 — 22,337,738 2,473,406 22,294,332 24,767,738 3,985,949 2007 5 - 40 777 Yamato Road Boca Raton, FL — 4,101,247 16,077,347 5,344,482 4,501,247 21,021,829 25,523,076 8,875,993 1987 5 - 40 951 Broken Sound Parkway Boca Raton, FL — 1,426,251 6,098,952 2,001,056 1,426,251 8,100,008 9,526,259 3,964,177 1986 5 - 40 1455 Remington Boulevard Bolingbrook, IL — 2,501,294 10,704,719 1,170 2,501,294 10,705,889 13,207,183 879,209 2012 5 - 40 LIBERTY PROPERTY TRUST AND LIBERTY PROPERTY LIMITED PARTNERSHIP SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION AS OF DECEMBER 31, 2015 Initial Cost Gross Amount Carried at End of Period Project Location Encumbrances (1) Land Building Costs Capitalized Subsequent to Acquisition (2) Land and Improvements Building and Improvements Total 12/31/2015 Accumulated Depreciation 12/31/2015 Date of Construction or Acquisition Depreciable life (years) OPERATING PROPERTIES 150 E Crossroads Parkway Bolingbrook, IL — * 3,078,949 14,143,377 1,124,578 3,078,949 15,267,955 18,346,904 1,166,216 2013 5 - 40 553 S Joliet Avenue Bolingbrook, IL — * 3,764,831 15,109,947 1,296,625 3,764,831 16,406,572 20,171,403 1,508,882 2013 5 - 40 400 Boulder Drive Breinigsville, PA — 2,859,106 — 10,599,615 2,865,575 10,593,146 13,458,721 3,094,910 2003 5 - 40 8201 Industrial Boulevard Breinigsville, PA — 2,089,719 — 8,353,910 2,222,168 8,221,461 10,443,629 2,038,762 2006 5 - 40 8500 Industrial Bouldvard Breinigsville, PA — 8,752,708 — 39,866,096 11,511,499 37,107,305 48,618,804 9,089,031 2007 5 - 40 860 Nestle Way Breinigsville, PA — 8,118,881 18,885,486 7,417,175 8,118,881 26,302,661 34,421,542 8,792,764 2004 5 - 40 1485 W. Commerce Avenue Carlisle, PA — 4,249,868 13,886,039 2,344,063 4,095,262 16,384,708 20,479,970 6,043,883 2004 5 - 40 40 Logistics Drive Carlisle, PA — 7,981,850 — 33,008,825 8,081,272 32,909,403 40,990,675 3,013,072 2011 5 - 40 135-195 East Elk Trail Carol Stream, IL — 4,873,094 12,430,320 594,561 4,873,094 13,024,881 17,897,975 694,475 2013 5 - 40 515 Kehoe Boulevard Carol Stream, IL — 5,523,427 14,581,705 203,950 5,523,427 14,785,655 20,309,082 943,841 2013 5 - 40 1413 Bradley Lane Carrollton, TX — * 247,477 2,028,322 83,523 247,477 2,111,845 2,359,322 176,999 2013 5 - 40 3200 Belmeade Drive Carrollton, TX — 1,042,453 8,027,974 414,235 1,042,453 8,442,209 9,484,662 634,295 2013 5 - 40 1475 Nitterhouse Drive Chambersburg, PA — 7,081,007 39,002,011 2,091,556 7,081,007 41,093,567 48,174,574 3,258,216 2013 5 - 40 95 Kriner Road Chambersburg, PA — 8,695,501 — 34,926,589 9,407,871 34,214,219 43,622,090 6,917,933 2006 5 - 40 9000 109th Street Champlain, MN — * 1,251,043 11,662,995 119,919 1,251,043 11,782,914 13,033,957 1,473,425 2011 5 - 40 11701 Goodrich Drive Charlotte, NC — 2,054,621 6,356,151 817,623 2,054,621 7,173,773 9,228,394 1,015,254 2013 5 - 40 12810 Virkler Drive Charlotte, NC — 475,368 2,367,586 738,197 476,262 3,104,888 3,581,150 380,450 2010 5 - 40 2700 Hutchinson McDonald Road Charlotte, NC — 912,500 4,721,259 309,842 912,500 5,031,101 5,943,601 613,658 2011 5 - 40 2701 Hutchinson McDonald Road Charlotte, NC — 1,275,000 4,649,750 630,260 1,275,000 5,280,010 6,555,010 666,561 2011 5 - 40 2730 Hutchinson McDonald Road Charlotte, NC — 1,878,750 10,129,499 43,022 1,878,750 10,172,521 12,051,271 1,162,053 2011 5 - 40 2801 Hutchinson McDonald Road Charlotte, NC — 1,065,000 6,975,250 213,916 1,065,000 7,189,166 8,254,166 872,805 2011 5 - 40 3000 Crosspoint Center Lane Charlotte, NC — 1,831,250 10,779,412 1,032,234 1,831,250 11,811,646 13,642,896 1,371,005 2011 5 - 40 3005 Crosspoint Center Lane Charlotte, NC — 1,990,000 6,561,540 665,107 1,990,000 7,226,647 9,216,647 780,369 2011 5 - 40 4045 Perimeter West Drive Charlotte, NC — 1,418,928 7,511,050 (52,318 ) 1,418,928 7,458,732 8,877,660 970,146 2011 5 - 40 4047 Perimeter West Drive Charlotte, NC — 1,279,004 — 6,399,096 1,279,004 6,399,096 7,678,100 688,283 2011 5 - 40 4525 Statesville Road Charlotte, NC — 841,250 5,279,315 316,750 837,144 5,600,171 6,437,315 654,702 2011 5 - 40 4835 Sirona Drive Charlotte, NC 3,210,583 690,750 5,086,388 102,104 690,750 5,188,492 5,879,242 474,733 2012 5 - 40 4925 Sirona Drive Charlotte, NC 3,238,688 603,003 4,969,011 107,476 603,003 5,076,487 5,679,490 544,133 2012 5 - 40 5033 Sirona Drive Charlotte, NC 2,622,886 509,247 4,710,218 166,524 613,962 4,772,027 5,385,989 455,174 2012 5 - 40 LIBERTY PROPERTY TRUST AND LIBERTY PROPERTY LIMITED PARTNERSHIP SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION AS OF DECEMBER 31, 2015 Initial Cost Gross Amount Carried at End of Period Project Location Encumbrances (1) Land Building Costs Capitalized Subsequent to Acquisition (2) Land and Improvements Building and Improvements Total 12/31/2015 Accumulated Depreciation 12/31/2015 Date of Construction or Acquisition Depreciable life (years) OPERATING PROPERTIES 5039 Sirona Drive Charlotte, NC — 1,027,500 6,172,807 23,107 1,027,500 6,195,914 7,223,414 197,115 2014 5 - 40 8910 Pioneer Avenue Charlotte, NC — 527,873 4,959,206 (21,446 ) 527,873 4,937,760 5,465,633 497,449 2011 5 - 40 8916 Pioneer Avenue Charlotte, NC — 557,730 5,785,333 347,238 557,730 6,132,571 6,690,301 719,728 2011 5 - 40 2601 Indian River Road Chesapeake, VA — * 1,711,746 10,418,032 437,088 1,711,746 10,855,120 12,566,866 885,048 2013 5 - 40 1540 S 54th Avenue Cicero, IL — 3,540,236 20,130,552 928,916 3,540,236 21,059,468 24,599,704 1,581,479 2013 5 - 40 4650 Lake Forest Drive Cinncinnati, OH — 1,030,242 4,003,024 233,667 1,030,242 4,236,690 5,266,932 357,652 2013 5 - 40 4750 Lake Forest Drive Cinncinnati, OH — 1,138,166 5,914,789 197,670 1,138,166 6,112,459 7,250,625 523,185 2013 5 - 40 9645 Gerwig Lane Columbia, MD — 1,915,960 6,461,228 320,391 1,915,960 6,781,619 8,697,579 578,261 2013 5 - 40 2550 John Glenn Avenue Columbus, OH — 540,601 5,129,342 869,575 540,601 5,998,917 6,539,518 406,007 2013 5 - 40 3800 Twin Creeks Drive Columbus, OH — 549,393 4,643,302 491,170 549,393 5,134,472 5,683,865 362,302 2013 5 - 40 330 South Royal Lane Coppell, TX — 2,091,426 — 11,002,754 2,091,426 11,002,754 13,094,180 65,097 2015 5 - 40 455 Airline Drive Coppell, TX — * 312,701 2,311,531 742,190 312,701 3,053,721 3,366,422 394,388 2013 5 - 40 2130 Baldwin Avenue Crofton, MD — 3,172,032 7,350,782 418,907 3,172,032 7,769,689 10,941,721 626,318 2013 5 - 40 329-333 Herrod Boulevard Dayton, NJ — * 4,039,559 20,863,051 2,285,014 4,039,559 23,148,065 27,187,624 1,701,158 2013 5 - 40 1250 Hall Court Deer Park, TX — 829,570 4,778,327 120,899 831,611 4,897,185 5,728,796 1,178,012 2006 5 - 40 301-321 S Goolsby Boulevard Deerfield Beach, FL — 498,136 2,781,180 184,573 498,136 2,965,753 3,463,889 197,893 2013 5 - 40 1680 Executive Drive Duluth, GA — 1,928,412 4,651,819 573,627 1,928,412 5,225,446 7,153,858 586,154 2013 5 - 40 1700 Executive Drive Duluth, GA — 1,082,072 2,496,599 458,767 1,082,072 2,955,366 4,037,438 348,680 2013 5 - 40 2670 Breckinridge Boulevard Duluth, GA — 1,676,415 4,567,592 568,647 1,676,415 5,136,240 6,812,655 416,765 2013 5 - 40 170 Parkway West Duncan, SC — 598,348 3,643,756 474,682 598,918 4,117,868 4,716,786 1,085,855 2006 5 - 40 190 Parkway West Duncan, SC — 551,663 3,310,993 251,300 552,211 3,561,744 4,113,955 871,587 2006 5 - 40 265 Parkway East Duncan, SC — 901,444 5,751,389 193,199 902,374 5,943,658 6,846,032 1,753,633 2006 5 - 40 285 Parkway East Duncan, SC — 975,433 5,851,990 360,530 976,393 6,211,560 7,187,953 1,558,582 2006 5 - 40 1000 Parliament Court Durham, NC — 2,229,000 7,064,506 81,890 2,229,000 7,146,396 9,375,396 334,717 2014 5 - 40 4226 Surles Court Durham, NC — 1,440,000 7,932,265 130,771 1,440,000 8,063,036 9,503,036 449,066 2014 5 - 40 4227 Surles Court Durham, NC — 1,500,000 5,624,030 74,695 1,500,000 5,698,724 7,198,724 249,153 2014 5 - 40 4234 Surles Court Durham, NC — 1,440,000 7,356,161 (4,933 ) 1,440,000 7,351,228 8,791,228 395,115 2014 5 - 40 4300 Emperor Center Durham, NC — 1,576,500 4,240,961 114,080 1,576,500 4,355,041 5,931,541 215,916 2014 5 - 40 3169 Dodd Road Eagan, MN — 988,594 6,586,907 1,566 988,594 6,588,473 7,577,067 733,028 2012 5 - 40 LIBERTY PROPERTY TRUST AND LIBERTY PROPERTY LIMITED PARTNERSHIP SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION AS OF DECEMBER 31, 2015 Initial Cost Gross Amount Carried at End of Period Project Location Encumbrances (1) Land Building Costs Capitalized Subsequent to Acquisition (2) Land and Improvements Building and Improvements Total 12/31/2015 Accumulated Depreciation 12/31/2015 Date of Construction or Acquisition Depreciable life (years) OPERATING PROPERTIES 3711 Kennebec Drive Eagan, MN — 999,702 4,042,589 313,808 999,702 4,356,397 5,356,099 768,996 2011 5 - 40 917 Lone Oak Road Eagan, MN — * 1,493,115 6,120,455 719,188 1,493,115 6,839,643 8,332,758 709,824 2013 5 - 40 10301-10305 West 70th Street Eden Prairie, MN — 120,622 1,085,226 310,312 118,300 1,397,860 1,516,160 587,445 1984 5 - 40 10321 West 70th Street Eden Prairie, MN — 145,198 1,305,700 578,495 142,399 1,886,994 2,029,393 816,454 1984 5 - 40 10333 West 70th Street Eden Prairie, MN — 110,746 995,868 333,454 108,610 1,331,458 1,440,068 567,078 1984 5 - 40 10349-10357 West 70th Street Eden Prairie, MN — 275,903 2,481,666 900,007 270,584 3,386,992 3,657,576 1,603,975 1985 5 - 40 10365-10375 West 70th Street Eden Prairie, MN — 291,077 2,618,194 1,530,128 285,464 4,153,935 4,439,399 1,596,638 1985 5 - 40 10393-10394 West 70th Street Eden Prairie, MN — 269,618 2,423,318 2,319,934 264,419 4,748,451 5,012,870 1,600,330 1985 5 - 40 10400 Viking Drive Eden Prairie, MN — 2,912,391 — 23,674,446 2,938,372 23,648,465 26,586,837 10,860,957 1999 5 - 40 7075 Flying Cloud Drive Eden Prairie, MN — 10,232,831 10,855,851 1,408,606 10,243,977 12,253,310 22,497,287 2,424,879 2007 5 - 40 7078 Shady Oak Road Eden Prairie, MN — 343,093 3,085,795 1,528,369 336,481 4,620,776 4,957,257 2,237,010 1985 5 - 40 7615 Smetana Lane Eden Prairie, MN — 1,011,517 — 9,043,293 3,000,555 7,054,255 10,054,810 2,778,882 2001 5 - 40 7625 Smetana Lane Eden Prairie, MN — 4,500,641 — 3,411,028 1,916,609 5,995,060 7,911,669 1,577,903 2006 5 - 40 7695-7699 Anagram Drive Eden Prairie, MN — 760,525 3,254,758 1,204,632 760,525 4,459,390 5,219,915 2,315,503 1997 5 - 40 7777 Golden Triangle Drive Eden Prairie, MN — 993,101 2,136,862 1,299,413 993,101 3,436,274 4,429,375 1,545,239 2000 5 - 40 7800 Equitable Drive Eden Prairie, MN — 2,188,525 3,788,762 545,644 2,188,525 4,334,405 6,522,930 1,753,415 1993 5 - 40 7905 Fuller Road Eden Prairie, MN — 1,229,862 4,075,167 1,980,136 1,230,965 6,054,200 7,285,165 3,491,555 1994 5 - 40 8855 Columbine Road Eden Prairie, MN — 1,400,925 — 5,199,574 1,599,757 5,000,742 6,600,499 1,448,477 2000 5 - 40 8911 Columbine Road Eden Prairie, MN — 916,687 — 4,465,073 1,718,407 3,663,353 5,381,760 1,135,266 2000 5 - 40 8937 Columbine Road Eden Prairie, MN — 1,325,829 — 5,872,477 1,739,966 5,458,340 7,198,306 1,690,162 2001 5 - 40 8967 Columbine Road Eden Prairie, MN — 1,450,000 — 4,536,312 1,450,000 4,536,312 5,986,312 1,720,545 2000 5 - 40 8995 Columbine Road Eden Prairie, MN — 1,087,594 — 4,610,464 2,055,296 3,642,762 5,698,058 1,261,670 2001 5 - 40 9023 Columbine Road Eden Prairie, MN — 1,956,273 — 6,217,735 1,956,273 6,217,735 8,174,008 2,480,335 1999 5 - 40 2250 Arthur Avenue Elk Grove, IL — 1,403,196 2,386,396 110,769 1,403,196 2,497,165 3,900,361 201,931 2013 5 - 40 6600 Business Parkway Elkridge, MD — 3,680,220 14,671,910 649,715 3,680,220 15,321,625 19,001,845 1,019,695 2013 5 - 40 6675 Business Parkway Elkridge, MD — * 2,421,854 9,730,192 421,361 2,421,854 10,151,553 12,573,407 687,926 2013 5 - 40 7351 Coca Cola Drive Elkridge, MD — 1,897,044 — 7,288,821 3,023,417 6,162,448 9,185,865 1,640,052 2006 5 - 40 21705-21707 Mississippi Street Elwood, IL — 10,594,259 30,329,802 895,205 10,594,259 31,225,008 41,819,267 3,644,519 2011 5 - 40 27143 S. Baseline Road Elwood, IL — 6,022,000 5,612,934 318,163 6,022,000 5,931,097 11,953,097 755,221 2011 5 - 40 LIBERTY PROPERTY TRUST AND LIBERTY PROPERTY LIMITED PARTNERSHIP SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION AS OF DECEMBER 31, 2015 Initial Cost Gross Amount Carried at End of Period Project Location Encumbrances (1) Land Building Costs Capitalized Subsequent to Acquisition (2) Land and Improvements Building and Improvements Total 12/31/2015 Accumulated Depreciation 12/31/2015 Date of Construction or Acquisition Depreciable life (years) OPERATING PROPERTIES 1800 Donaldson Road Erlanger, KY — — 13,211,604 653,387 — 13,864,991 13,864,991 2,037,866 2013 5 - 40 180 Sheree Boulevard Exton, PA — 2,647,861 11,334,403 2,496,920 2,649,426 13,829,758 16,479,184 3,777,650 2007 5 - 40 6880 Fairfield Drive Fairfield, OH — 412,136 3,029,177 74,745 412,136 3,103,922 3,516,058 235,064 2013 5 - 40 7000-7018 Fairfield Business Fairfield, OH — 367,925 2,205,817 87,643 367,925 2,293,460 2,661,385 185,674 2013 5 - 40 10721 Jasmine Street Fontana, CA — 11,427,061 23,784,779 1,682,426 11,427,061 25,467,205 36,894,266 390,283 2015 5 - 40 2000 Southpointe Drive Forest Park, GA — 756,221 9,115,626 508,486 756,221 9,624,112 10,380,333 770,103 2013 5 - 40 1400 NW 65th Place Fort Lauderdale, FL — 545,480 2,540,210 66,119 545,480 2,606,329 3,151,809 179,068 2013 5 - 40 6500 NW 12th Avenue Fort Lauderdale, FL — — 3,064,734 312,146 — 3,376,880 3,376,880 275,900 2013 5 - 40 6501 NW 12th Avenue Fort Lauderdale, FL — 519,984 2,677,465 51,998 519,984 2,729,463 3,249,447 198,088 2013 5 - 40 6600 NW 12th Avenue Fort Lauderdale, FL — — 2,988,181 189,131 — 3,177,312 3,177,312 262,429 2013 5 - 40 5400 Alliance Gateway Freeway Fort Worth, TX — 1,515,860 6,710,118 417,705 1,515,860 7,127,823 8,643,683 699,894 2013 5 - 40 9601 Cosner Drive Fredericksburg, VA — 475,262 3,917,234 242,595 475,262 4,159,829 4,635,091 2,142,481 1995 5 - 40 5410 - 5430 Northwest 33rd Avenue Ft. Lauderdale, FL — 603,776 4,176,238 1,948,374 625,111 6,103,277 6,728,388 2,708,183 1985 5 - 40 12601 Industry Street Garden Grove, CA — 2,048,143 1,088,697 70,518 2,048,143 1,159,215 3,207,358 166,449 2013 5 - 40 12641 Industry Street Garden Grove, CA — 3,766,822 2,539,214 132,812 3,766,822 2,672,026 6,438,848 221,193 2013 5 - 40 12681-12691 Pala Drive Garden Grove, CA — 5,221,102 3,225,596 83,450 5,220,148 3,310,000 8,530,148 162,254 2014 5 - 40 850 S Jupiter Road Garland, TX — 799,707 6,122,065 442,326 799,707 6,564,391 7,364,098 501,325 2013 5 - 40 2510 W Main Street Grand Prairie, TX — * 1,785,741 11,158,818 988,249 1,785,741 12,147,067 13,932,808 1,226,296 2013 5 - 40 4251 North Highway 121 Grapevine, TX — * 1,165,780 7,799,270 422,135 1,165,780 8,221,404 9,387,184 696,539 2013 5 - 40 116 Pleasant Ridge Road Greenville, SC — 1,547,811 — 14,182,834 3,712,683 12,017,962 15,730,645 2,299,069 2006 5 - 40 25 Brookfield Oaks Drive Greenville, SC — 288,823 3,441,512 43,182 288,823 3,484,694 3,773,517 252,214 2014 5 - 40 45 Brookfield Oaks Drive Greenville, SC — 818,114 — 4,470,587 825,529 4,463,172 5,288,701 1,000,248 2006 5 - 40 2011 Southtech Drive Greenwood, IN — 223,702 3,574,142 325,468 223,702 3,899,610 4,123,312 358,722 2013 5 - 40 2121 Southtech Drive Greenwood, IN — 272,823 3,606,920 412,167 272,823 4,019,088 4,291,911 478,262 2013 5 - 40 800 Commerce Parkway West Drive Greenwood, IN — 1,374,664 29,963,830 1,612,346 1,374,664 31,576,176 32,950,840 2,318,432 2013 5 - 40 110 Caliber Ridge Drive Greer, SC — 555,549 — 6,331,158 1,228,880 5,657,827 6,886,707 178,544 2014 5 - 40 140 Caliber Ridge Drive Greer, SC — 1,243,100 — 6,425,239 1,243,100 6,425,239 7,668,339 196,553 2015 5 - 40 1487 South Highway 101 Greer, SC — 464,237 — 5,829,595 1,301,738 4,992,094 6,293,832 878,328 2007 5 - 40 2727 London Grove Road Groveport, OH — 1,875,607 11,937,935 334,714 1,875,607 12,272,649 14,148,256 1,085,883 2013 5 - 40 LIBERTY PROPERTY TRUST AND LIBERTY PROPERTY LIMITED PARTNERSHIP SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION AS OF DECEMBER 31, 2015 Initial Cost Gross Amount Carried at End of Period Project Location Encumbrances (1) Land Building Costs Capitalized Subsequent to Acquisition (2) Land and Improvements Building and Improvements Total 12/31/2015 Accumulated Depreciation 12/31/2015 Date of Construction or Acquisition Depreciable life (years) OPERATING PROPERTIES 11835 Newgate Boulevard Hagerstown, MD — 14,121,622 — 23,025,928 14,121,622 23,025,928 37,147,550 596,879 2015 5 - 40 11841 Newgate Boulevard Hagerstown, MD — 3,356,207 — 30,555,105 9,741,685 24,169,627 33,911,312 5,114,351 2008 5 - 40 1560 Hunter Road Hanover Park, IL — * 2,639,734 12,310,741 579,936 2,639,734 12,890,677 15,530,411 981,769 2013 5 - 40 1575 Hunter Road Hanover Park, IL — * 3,293,284 17,235,926 933,187 3,293,284 18,169,113 21,462,397 1,390,165 2013 5 - 40 7361 Coca Cola Drive Hanover, MD — 2,245,187 — 9,393,211 3,822,710 7,815,688 11,638,398 1,416,465 2004 5 - 40 7460 New Ridge Road Hanover, MD — 3,785,446 — 7,660,152 3,796,023 7,649,575 11,445,598 96,683 2015 5 - 40 7462 New Ridge Road Hanover, MD — 4,059,337 — 7,479,823 4,070,629 7,468,531 11,539,160 137,956 2015 5 - 40 500 McCarthy Drive Harrisburg, PA — 5,194,872 19,991,436 4,670,017 5,687,013 24,169,312 29,856,325 7,740,706 2005 5 - 40 600 Industrial Drive Harrisburg, PA — 7,743,800 — 29,159,534 9,368,557 27,534,777 36,903,334 7,874,305 2005 5 - 40 7195 Grayson Road Harrisburg, PA — 464,534 6,066,272 243,707 464,534 6,309,979 6,774,513 449,889 2013 5 - 40 7253 Grayson Road Harrisburg, PA — 954,130 10,585,367 506,909 954,130 11,092,276 12,046,406 728,052 2013 5 - 40 12537 Cerise Avenue Hawthorne, CA — 2,203,194 5,758,809 94,181 2,203,194 5,852,990 8,056,184 388,295 2013 5 - 40 1010 Petersburg Road Hebron, KY — 305,471 5,434,505 (819,916 ) 305,471 4,614,589 4,920,060 450,646 2013 5 - 40 785 Lindbergh Court Hebron, KY — 401,410 3,087,899 511,543 401,410 3,599,442 4,000,852 372,958 2013 5 - 40 805 Lindbergh Court Hebron, KY — 292,096 2,502,486 156,556 292,096 2,659,041 2,951,137 244,630 2013 5 - 40 825 Lindbergh Court Hebron, KY — 370,149 3,095,116 357,185 370,149 3,452,302 3,822,451 333,114 2013 5 - 40 845 Lindbergh Court Hebron, KY — 444,318 3,811,889 257,404 444,318 4,069,293 4,513,611 356,426 2013 5 - 40 1498 Eagle Hill Drive High Point, NC — 94,274 — 6,220,665 791,880 5,523,059 6,314,939 1,345,655 2005 5 - 40 4183 Eagle Hill Drive High Point, NC — 122,203 — 3,216,383 526,266 2,812,320 3,338,586 1,102,988 2001 5 - 40 4189 Eagle Hill Drive High Point, NC — 100,106 — 3,610,018 431,106 3,279,018 3,710,124 1,476,028 2001 5 - 40 4195 Eagle Hill Drive High Point, NC — 107,586 — 3,391,467 505,700 2,993,353 3,499,053 818,988 2004 5 - 40 4328, 4336 Federal Drive High Point, NC 1,055,450 521,122 — 5,069,178 825,092 4,765,208 5,590,300 2,212,331 1995 5 - 40 4344 Federal Drive High Point, NC — 484,001 — 3,072,355 173,623 3,382,733 3,556,356 1,673,063 1996 5 - 40 4380 Federal Drive High Point, NC — 282,996 — 2,161,830 283,368 2,161,458 2,444,826 1,055,218 1997 5 - 40 4388 Federal Drive High Point, NC — 143,661 — 1,214,707 132,655 1,225,713 1,358,368 573,704 1997 5 - 40 4475 Premier Drive High Point, NC — 748,693 — 6,806,479 1,525,421 6,029,751 7,555,172 1,127,972 2006 5 - 40 4500 Green Point Drive High Point, NC — 230,622 — 2,805,986 231,692 2,804,916 3,036,608 1,447,046 1989 5 - 40 4501 Green Point Drive High Point, NC — 319,289 — 3,166,402 320,450 3,165,241 3,485,691 1,766,943 1989 5 - 40 4523 Green Point Drive High Point, NC — 234,564 — 3,339,774 235,698 3,338,640 3,574,338 2,105,912 1988 5 - 40 LIBERTY PROPERTY TRUST AND LIBERTY PROPERTY LIMITED PARTNERSHIP SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION AS OF DECEMBER 31, 2015 Initial Cost Gross Amount Carried at End of Period Project Location Encumbrances (1) Land Building Costs Capitalized Subsequent to Acquisition (2) Land and Improvements Building and Improvements Total 12/31/2015 Accumulated Depreciation 12/31/2015 Date of Construction or Acquisition Depreciable life (years) OPERATING PROPERTIES 4524 Green Point Drive High Point, NC — 182,810 — 2,779,342 183,888 2,778,264 2,962,152 1,656,145 1989 5 - 40 Unit 5 Logix Road Hinckley, UK — 10,547,677 29,691,911 (4,425,698 ) 9,387,605 26,426,285 35,813,890 1,750,647 2013 5 - 40 1515 6th Street South Hopkins,MN — 813,036 1,503,075 364,382 813,036 1,867,457 2,680,493 268,536 2013 5 - 40 1600 5th Street South Hopkins,MN — 339,336 2,106,454 80,794 339,336 2,187,249 2,526,585 159,476 2013 5 - 40 1000 South Loop West Houston, TX — * 509,351 3,549,504 863,453 509,351 4,412,957 4,922,308 398,539 2013 5 - 40 10241 W Little York Road Houston, TX — 558,491 5,740,552 133,643 558,491 5,874,195 6,432,686 396,734 2013 5 - 40 10245 W Little York Road Houston, TX — 426,927 3,460,513 379,988 426,927 3,840,501 4,267,428 378,078 2013 5 - 40 10301 Round Up Lane Houston, TX — 545,501 2,927,700 1,023,687 545,501 3,951,386 4,496,887 424,803 2010 5 - 40 10305 Round Up Lane Houston, TX — 1,340,609 7,489,720 3,358,808 1,340,609 10,848,527 12,189,136 1,876,354 2010 5 - 40 1050 Greens Parkway Houston, TX — 973,482 — 3,627,200 992,093 3,608,589 4,600,682 122,958 2015 5 - 40 10607 Haddington Drive Houston, TX — * 201,469 1,631,561 132,607 201,469 1,764,169 1,965,638 148,538 2013 5 - 40 10735 West Little York Road Houston, TX — 1,110,988 6,351,946 3,274,945 1,135,483 9,602,396 10,737,879 3,102,435 2000 5 - 40 10739 West Little York Road Houston, TX — 797,931 5,950,894 458,927 799,560 6,408,192 7,207,752 2,214,384 1999 5 - 40 11201 Greens Crossing Boulevard Houston, TX — 1,006,194 5,412,584 2,781,419 1,008,542 8,191,655 9,200,197 2,351,372 2007 5 - 40 11220 Ella Boulevard Houston, TX — 1,505,855 — 7,397,354 1,534,644 7,368,565 8,903,209 162,097 2015 5 - 40 1283 N Post Oak Road Houston, TX — * 80,730 870,656 145,476 80,730 1,016,132 1,096,862 91,740 2013 5 - 40 1287 N Post Oak Road Houston, TX — * 146,654 1,620,780 59,710 146,654 1,680,489 1,827,143 163,411 2013 5 - 40 1291 N Post Oak Road Houston, TX — * 510,102 4,129,042 442,674 510,102 4,571,716 5,081,818 389,908 2013 5 - 40 1416 N Sam Houston Parkway East Houston, TX — * 218,850 1,639,902 553,328 218,850 2,193,229 2,412,079 188,352 2013 5 - 40 1420 N Sam Houston Parkway East Houston, TX — * 211,279 1,554,156 114,556 211,279 1,668,712 1,879,991 145,411 2013 5 - 40 14200 Hollister Road Houston, TX — 1,396,794 — 4,859,739 1,699,632 4,556,901 6,256,533 417,555 2011 5 - 40 1424 N Sam Houston Parkway East Houston, TX — * 283,107 2,077,323 287,441 283,107 2,364,764 2,647,871 205,864 2013 5 - 40 1428 N Sam Houston Parkway East Houston, TX — * 367,446 1,952,453 143,093 367,446 2,095,545 2,462,991 184,076 2013 5 - 40 14300 Hollister Road Houston, TX — * 1,377,193 — 5,679,691 1,405,899 5,650,985 7,056,884 329,025 2014 5 - 40 14400 Hollister Road Houston, TX — * 1,830,419 — 7,239,740 1,861,540 7,208,619 9,070,159 879,677 2012 5 - 40 15102 Sommermeyer Street Houston, TX — 755,121 3,155,774 247,397 755,121 3,403,171 4,158,292 308,320 2013 5 - 40 15150 Sommermeyer Street Houston, TX — 418,580 1,564,587 230,574 418,580 1,795,161 2,213,741 167,358 2013 5 - 40 16330 Central Green Boulevard Houston, TX — 1,540,109 — 8,528,507 1,966,472 8,102,144 10,068,616 410,845 2014 5 - 40 16405 Air Center Boulevard Houston, TX — 438,853 3,030,396 510,089 438,853 3,540,485 3,979,338 1,716,546 1997 5 - 40 LIBERTY PROPERTY TRUST AND LIBERTY PROPERTY LIMITED PARTNERSHIP SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION AS OF DECEMBER 31, 2015 Initial Cost Gross Amount Carried at End of Period Project Location Encumbrances (1) Land Building Costs Capitalized Subsequent to Acquisition (2) Land and Improvements Building and Improvements Total 12/31/2015 Accumulated Depreciation 12/31/2015 Date of Construction or Acquisition Depreciable life (years) OPERATING PROPERTIES 16420 West Hardy Road Houston, TX — 529,876 3,267,872 334,634 529,876 3,602,506 4,132,382 266,194 2013 5 - 40 16445 Air Center Boulevard Houston, TX — 363,339 2,509,186 288,397 363,339 2,797,583 3,160,922 1,278,617 1997 5 - 40 1646 Rankin Road Houston, TX — 329,961 — 5,128,210 592,234 4,865,937 5,458,171 1,215,130 2005 5 - 40 1655 Townhurst Drive Houston, TX — * 197,226 935,036 524,936 197,226 1,459,972 1,657,198 148,054 2013 5 - 40 16580 Air Center Boulevard Houston, TX — 289,000 3,559,857 1,285,142 289,000 4,845,000 5,134,000 1,796,918 1997 5 - 40 16602 Central Green Boulevard Houston, TX — 284,403 — 5,162,588 503,779 4,943,212 5,446,991 1,242,290 2005 5 - 40 16605 Air Center Boulevard Houston, TX — 298,999 — 3,423,751 496,186 3,226,564 3,722,750 1,102,188 2002 5 - 40 1665 Townhurst Drive Houston, TX — * 452,439 2,016,585 57,074 452,439 2,073,658 2,526,097 144,198 2013 5 - 40 16680 Central Green Boulevard Houston, TX — 311,952 — 4,169,789 492,869 3,988,872 4,481,741 1,148,408 2001 5 - 40 16685 Air Center Boulevard Houston, TX — 414,691 — 2,463,366 414,691 2,463,366 2,878,057 710,865 2004 5 - 40 1755 Trans Central Drive Houston, TX — 293,534 3,036,269 1,334,826 306,147 4,358,482 4,664,629 1,321,325 1999 5 - 40 4301 S Pinemont Drive Houston, TX — * 226,973 1,174,979 77,965 226,973 1,252,944 1,479,917 125,330 2013 5 - 40 4401 S Pinemont Drive Houston, TX — * 244,240 1,412,622 101,328 244,240 1,513,950 1,758,190 212,509 2013 5 - 40 4501 S Pinemont Drive Houston, TX — * 252,907 1,504,053 68,496 252,907 1,572,549 1,825,456 182,795 2013 5 - 40 5200 N. Sam Houston Parkway Houston, TX — 1,519,458 7,135,548 3,703,478 1,520,074 10,838,410 12,358,484 2,963,534 2007 5 - 40 5250 N. Sam Houston Parkway Houston, TX — 2,173,287 8,868,256 2,745,460 2,173,942 11,613,061 13,787,003 2,762,980 2007

Organization and Basis of Pre33

Organization and Basis of Presentation (Policy)	12 Months Ended
	Dec. 31, 2015
Organization and Basis of Presentation [Abstract]
Organization	ORGANIZATION Liberty Property Trust (the “Trust”) is a self-administered and self-managed Maryland real estate investment trust (a “REIT”). Substantially all of the Trust’s assets are owned directly or indirectly, and substantially all of the Trust’s operations are conducted directly or indirectly, by its subsidiary, Liberty Property Limited Partnership, a Pennsylvania limited partnership (the “Operating Partnership” and, together with the Trust and their consolidated subsidiaries, the “Company”). The Trust is the sole general partner and also a limited partner of the Operating Partnership, owning 97.7% of the common equity of the Operating Partnership at December 31, 2015 . The Company owns and operates industrial properties nationally and owns and operates office properties in a focused group of office markets. Additionally, the Company owns certain assets in the United Kingdom. Unless otherwise indicated, the notes to the Consolidated Financial Statements apply to both the Trust and the Operating Partnership. The terms the "Company,” “we,” “our” and “us” means the Trust and Operating Partnership collectively. All square footage amounts are unaudited.

Summary of Significant Accoun34

Summary of Significant Accounting Policies (Policy)	12 Months Ended
	Dec. 31, 2015
Earnings Per Share, Basic and Diluted [Line Items]
Earnings Per Share, Policy [Policy Text Block]	Earnings Per Share of the REIT Basic earnings per share is calculated by dividing the income available to common shareholders for the period by the weighted average number of common shares outstanding during the period using the two class method. Diluted earnings per share is calculated by dividing the net income available to common shareholders for the period by the weighted average number of common and dilutive securities outstanding during the period.
Use of Estimates, Policy [Policy Text Block]	Use of Estimates The preparation of financial statements in conformity with U.S. generally accepted accounting principles ("US GAAP") requires management to make estimates and assumptions that affect amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.
Principles of Consolidation, Policy [Policy Text Block]	Principles of Consolidation The consolidated financial statements of the Company include the Trust, the Operating Partnership, wholly owned subsidiaries and those subsidiaries in which the Company owns a majority voting interest with the ability to control operations of the subsidiaries and where no approval, veto or other important rights have been granted to the noncontrolling shareholders. The Company consolidates joint ventures that are considered to be variable interest entities (“VIEs”) where we are the primary beneficiary. The Company (i) evaluates the sufficiency of the total equity investment at risk, (ii) reviews the voting rights and decision-making authority of the equity investment holders as a group and whether there are any guaranteed returns, protection against losses, or capping of residual returns within the group and (iii) establishes whether activities within the venture are on behalf of an investor with disproportionately few voting rights in making this VIE determination. To the extent that the Company (i) is the sole entity that has the power to direct the activities of the VIE and (ii) has the obligation or rights to absorb the VIE's losses or receive its benefits, then the Company would be the primary beneficiary and would consolidate the VIE. All significant intercompany transactions and accounts have been eliminated.
Reclassifications, Policy [Policy Text Block]	Reclassifications Certain amounts from prior years have been reclassified to conform to current-year presentation including reclassifying the accompanying consolidated balance sheets for assets held for sale. As disclosed in Note 12, Shareholders' Equity - Trust - Share Repurchase, the Company repurchased common shares pursuant to a share repurchase program authorized by the Company's Board of Trustees. These repurchased shares along with those repurchased in prior periods are subject to state corporate laws that establish the legal status of redeemed shares and prevent them from being reported as treasury shares within the consolidated financial statements. The Trust previously misclassified the repurchased shares as common shares in treasury. The share repurchases should have been classified as reductions of common shares of beneficial interest and additional paid-in capital. The accompanying consolidated balance sheet and statement of equity of the Trust has been restated to correct the misclassification as follows (in thousands except share amounts): December 31, January 1, 2014 2013 2013 Common shares of beneficial interest (as previously reported) $ 150 $ 148 $ 119 Impact of reclassification (1 ) (1 ) (1 ) Common shares of beneficial interest (as adjusted and currently reported) $ 149 $ 147 $ 118 Additional paid-in capital (as previously reported) $ 3,740,594 $ 3,669,618 $ 2,687,701 Impact of reclassification (51,950 ) (51,950 ) (51,950 ) Additional paid-in capital (as adjusted and currently reported) $ 3,688,644 $ 3,617,668 $ 2,635,751 Common shares in treasury, at cost (as previously reported) $ (51,951 ) $ (51,951 ) $ (51,951 ) Impact of reclassification 51,951 51,951 51,951 Common shares in treasury, at cost (as adjusted and currently reported) $ — $ — $ — Number of common shares (as previously reported) 149,807,179 147,846,801 119,720,776 Impact of reclassification (1,249,909 ) (1,249,909 ) (1,249,909 ) Number of common shares (as adjusted and currently reported) 148,557,270 146,596,892 118,470,867 The reclassification has no impact on the previously reported consolidated statements of comprehensive income, nor does it have any effect on the previously reported consolidated statements of cash flows or shareholders' equity in total. In addition, the reclassification has no impact on the previously reported consolidated financial statements of the Operating Partnership.
Real Estate and Depreciation, Policy [Policy Text Block]	Real Estate and Depreciation The properties are recorded at cost and are depreciated using the straight line method over their estimated useful lives. The estimated useful lives are as follows: Building and improvements 40 years (blended) Capital improvements 15 - 20 years Equipment 5 - 10 years Tenant improvements Term of the related lease Expenditures directly related to the acquisition or the improvement of real estate, including interest and other costs capitalized during development, are included in net real estate and are stated at cost. The capitalized costs include pre-construction costs essential to the development of the property, development and construction costs, interest costs, real estate taxes, development-related salaries and other costs incurred during the period of development. The total of capitalized compensation costs directly related to the development of property for the years ended December 31, 2015 , 2014 and 2013 was $5.5 million , $5.1 million and $3.3 million , respectively. Construction related payables at December 31, 2015 and 2014 were $42.9 million and $41.5 million , respectively. The Company allocates the purchase price of real estate acquired to land, building and improvements and intangibles at the fair value of each component. Lease values for acquired properties are recorded based on the present value (using a discount rate which reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to each in-place lease and (ii) management's estimate of fair market lease rates for each corresponding in-place lease ("Market Value Intangible"). Origination values are also assigned to in-place leases, and, where appropriate, value is assigned to customer relationships ("Origination Value Intangible"). Acquisition-related costs for properties with in-place leases are expensed as incurred. Expenditures for maintenance and repairs are charged to operations as incurred. The Company depreciates the amounts allocated to building and improvements over 40 years and amortizes the amounts allocated to intangibles relating to in-place leases, which are included in deferred financing and leasing costs and other liabilities in the accompanying consolidated balance sheets, over the remaining term of the related leases. Market Value Intangible amortization is recorded as rental revenue. Origination Value Intangible amortization is recorded as depreciation and amortization. This calculation includes both the remaining noncancelable period and any bargain renewal option periods. Once a property is designated as held for sale, no further depreciation expense is recorded. The Company evaluates its real estate investments upon occurrence of a significant adverse change in its operations to assess whether any impairment indicators are present that affect the recovery of the recorded value. If indicators of impairment are identified, the Company estimates the future undiscounted cash flows from the use and eventual disposition of the property and compares this amount to the carrying value of the property. If any real estate investment is considered impaired, a loss is recognized to reduce the carrying value of the property to its estimated fair value.
Investments in Unconsolidated Joint Ventures, Policy [Policy Text Block]	Investments in Unconsolidated Joint Ventures The Company accounts for its investments in unconsolidated joint ventures using the equity method of accounting as the Company exercises significant influence, but does not control these entities. Under the equity method of accounting, the net equity investment of the Company is reflected in the accompanying consolidated balance sheets and the Company's share of net income from the joint ventures is included in the accompanying consolidated statements of comprehensive income. On a periodic basis, management assesses whether there are any indicators that the value of the Company's investments in unconsolidated joint ventures may be other-than-temporarily-impaired. An investment is impaired only if management's estimate of the value of the investment is less than the carrying value of the investment, and such decline in value is deemed to be other-than-temporary. To the extent impairment has occurred, the loss is measured as the excess of the carrying amount of the investment over the estimated fair value of the investment. The estimated fair value of the investments is determined using a discounted cash flow model which is a Level 3 valuation under ASC 820, " Fair Value Measurement ." The Company considers a number of assumptions that are subject to economic and market uncertainties including, among others, demand for space, competition for tenants, changes in market rental rates, operating costs, capitalization rates, holding periods and discount rates.
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and Cash Equivalents Highly liquid investments with a maturity of three months or less when purchased are classified as cash equivalents.
Restricted Cash, Policy [Policy Text Block]	Restricted Cash Restricted cash includes tenant security deposits and escrow funds that the Company maintains pursuant to certain mortgage loans. Restricted cash also includes the undistributed proceeds from the sale of residential land in Kent County, United Kingdom.
Accounts Receivable Deferred Rent Receivable, Policy	Accounts Receivable/Deferred Rent Receivable The Company's accounts receivable are comprised of rents and charges for property operating costs due from tenants. The Company's deferred rent receivable represents the cumulative difference between rent revenue recognized on a straight line basis and contractual payments due under the terms of tenant leases. The Company periodically performs a detailed review of amounts due from tenants to determine if accounts receivable and deferred rent receivable balances are collectible. Based on this review, accounts receivable and deferred rent receivable are reduced by an allowance for doubtful accounts. The Company considers tenant credit quality and payment history and general economic conditions in determining the allowance for doubtful accounts. If the accounts receivable balance or the deferred rent receivable balance is subsequently deemed uncollectible, the receivable and allowance for doubtful account balance are written off.
Revenues, Policy [Policy Text Block]	Revenues The Company earns rental income under operating leases with tenants. Rental income is recognized on a straight line basis over the applicable non-cancelable lease term. Operating expense reimbursements consisting of amounts due from tenants for real estate taxes, utilities and other recoverable costs are recognized as revenue in the period in which the corresponding expenses are incurred. The Company considers any renewal options in determining the lease term. To the extent a lease includes a tenant option to renew or extend the duration of the lease at a fixed or determinable rental rate, the Company evaluates whether or not that option represents a bargain renewal option by analyzing if there is reasonable assurance at lease inception that the tenant will exercise the option because the rental rate is sufficiently lower than the expected rental rate for equivalent property under similar terms and conditions at the exercise date. Termination fees (included in rental revenue) are fees that the Company has agreed to accept in consideration for permitting certain tenants to terminate their lease prior to the contractual expiration date. The Company recognizes termination fees during the period that landlord services are rendered in accordance with Securities and Exchange Commission Staff Accounting Bulletin 104, " Revenue Recognition ," after the following conditions are met: a. the termination agreement is executed, b. the termination fee is determinable, and c. collectability of the termination fee is assured.
Deferred Financing and Leasing Costs, Policy [Policy Text Block]	Deferred Financing and Leasing Costs Costs incurred in connection with the financing of the credit facility or leasing are capitalized and amortized on a straight line basis over the term of the related loan or lease. Costs incurred in connection with the financing of mortgage loans or unsecured notes are reported as a deduction from the face amount of that liability and amortized on a straight line basis over the term of the related loan. Deferred financing cost amortization is reported as interest expense. Certain employees of the Company are compensated for leasing services related to the Company's properties. The compensation directly related to these leasing services is capitalized and amortized as a deferred leasing cost over the term of the related lease.
Fair Value of Financial Instruments, Policy [Policy Text Block]	Fair Value of Financial Instruments The following disclosure of estimated fair value was determined by management using available market information and appropriate valuation methodologies. However, considerable judgment is necessary to interpret market data and develop estimated fair value. Accordingly, the following estimates are not necessarily indicative of the amounts the Company could have realized on disposition of the financial instruments at December 31, 2015 and December 31, 2014 . The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts. The carrying value of cash and cash equivalents, restricted cash, accounts receivable, accounts payable, accrued interest, dividend and distributions payable and other liabilities are reasonable estimates of fair value because of the short-term nature of these instruments. The carrying value of the outstanding amounts under the Company's credit facility is also a reasonable estimate of fair value because interest rates float at a rate based on LIBOR. The Company determines the fair value of its interest rate swaps by using the standard methodology of netting discounted future fixed cash payments with the discounted expected variable cash receipts. These variable cash receipts of interest rate swaps are based on expectations of future LIBOR interest rates (forward curves) estimated by observing market LIBOR interest rate curves. This is a Level 2 fair value calculation. Also, credit valuation adjustments are factored into the fair value calculations to account for potential nonperformance risk. These credit valuation adjustments were concluded to be not significant inputs for the fair value calculations for the periods presented. See Note 21 - Derivative Instruments. The Company used a discounted cash flow model to determine the estimated fair value of its debt as of December 31, 2015 and December 31, 2014 . This is a Level 3 fair value calculation. The inputs used in preparing the discounted cash flow model include actual maturity dates and scheduled cash flows as well as estimates for market value discount rates. The Company updates the discounted cash flow model on a quarterly basis to reflect any changes in the Company's debt holdings and changes to discount rate assumptions.
Income Tax, Policy [Policy Text Block]	Income Taxes The Company has elected to be taxed as a REIT under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended (the "Code"). As a result, the Company generally is not subject to federal income taxation at the corporate level to the extent it distributes annually at least 100% of its REIT taxable income, as defined in the Code, to its shareholders and satisfies certain other organizational and operational requirements. The Company has met these requirements and, accordingly, no provision has been made for federal income taxes in the accompanying consolidated financial statements. If the Company fails to qualify as a REIT in any taxable year, the Company will be subject to federal income tax on its taxable income at regular corporate rates (including any alternative minimum tax) and may not be able to qualify as a REIT for the four subsequent taxable years. Even as a REIT, the Company may still be subject to certain state and local income and property taxes, and to federal income and excise taxes on undistributed taxable income. Several of the Company's subsidiaries are taxable REIT subsidiaries (each a "TRS") and are subject to federal and state income taxes separate from the Company. In general, a TRS may perform additional services for tenants and generally may engage in real estate or non-real estate businesses that are not permitted REIT activities. The Company itself is also subject to tax in certain states and the United Kingdom. Accordingly, the Company recognizes federal, state and foreign income taxes in accordance with US GAAP, as applicable. There are no uncertain tax positions or possibly significant unrecognized tax benefits that are reasonably expected to occur within the next 12 months. The Company's policy is to recognize interest accrued related to unrecognized benefits in interest expense and penalties in other expense. There were no interest or penalties deducted in any of the years ended December 31, 2015 , 2014 and 2013 and no interest and penalties accrued at December 31, 2015 or December 31, 2014 which related to any uncertain tax positions or significant unrecognized tax benefits. Certain of the Company's taxable REIT subsidiaries had net operating loss carryforwards available of approximately $29.1 million as of December 31, 2015 . These carryforwards begin to expire in 2018 . The Company has considered future taxable income and has determined that a valuation allowance for the full carrying value of net operating loss carryforwards is appropriate. The Company and its subsidiaries file income tax returns in the U.S. federal jurisdiction, certain state and local jurisdictions, the United Kingdom and (in prior years) Luxembourg. With few exceptions, the Company and its subsidiaries are no longer subject to examination by taxing authorities in these jurisdictions for years prior to 2009. The Federal tax cost basis of the wholly owned real estate was $7.6 billion and $7.5 billion at December 31, 2015 and 2014 , respectively.
Share-based Compensation, Policy [Policy Text Block]	Share-Based Compensation Share-based compensation cost is measured at the grant date, based on the fair value of the award, and is recognized as expense over the employees' requisite service period.
Derivatives, Policy [Policy Text Block]	Derivative Financial Instruments We borrow funds at a combination of fixed and variable rates. Borrowings under our revolving credit facility and certain bank mortgage loans bear interest at variable rates. Our long-term debt typically bears interest at fixed rates. Our interest rate risk management objectives are to limit generally the impact of interest rate changes on earnings and cash flows and to lower our overall borrowing costs. To achieve these objectives, from time to time, we enter into interest rate hedge contracts such as collars, swaps, caps and treasury lock agreements in order to mitigate our interest rate risk with respect to various debt instruments. We generally do not hold or issue these derivative contracts for trading or speculative purposes. The interest rate on all of our variable rate debt is generally adjusted at one or three month intervals, subject to settlements under interest rate hedge contracts. Interest rate swaps involve the receipt of variable-rate amounts from a counterparty in exchange for making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive loss (for the Trust) and general partner's equity and limited partners' equity - common units (for the Operating Partnership) and is subsequently reclassified into interest expense in the period that the hedged forecasted transaction affects earnings.
Foreign Currency Transactions and Translations Policy [Policy Text Block]	Foreign Currency The functional currency of the Company's United Kingdom operations is pounds sterling. The Company translates the financial statements for the United Kingdom operations into US dollars. For the Trust, gains and losses resulting from this translation are included in accumulated other comprehensive loss as a separate component of shareholders' equity and a proportionate amount of gain or loss is allocated to noncontrolling interest - operating partnership - common units. For the Operating Partnership, gains and losses resulting from this translation are included in general partner's equity and limited partners' equity - common units. Upon sale or upon complete or substantially complete liquidation of the Company's foreign investment, the gain or loss on the sale will include the cumulative translation adjustments that have been previously recorded in accumulated other comprehensive loss and noncontrolling interest - operating partnership - common units (for the Trust) and in general partner's equity and limited partners' equity - common units (for the Operating Partnership).
Comprehensive Income, Policy [Policy Text Block]	Comprehensive Income Comprehensive income, as reflected on the consolidated statements of comprehensive income, is defined as all changes in equity during each period except for those resulting from investments by or distributions to shareholders. Accumulated other comprehensive loss, as reflected on the Company's consolidated balance sheets and consolidated statements of equity, reflects the effective portion of the cumulative changes in the fair value of derivatives in qualifying cash flow hedge relationships as well as gains and losses resulting from foreign currency translation.
Real Estate Held for Development and Sale, Policy [Policy Text Block]	Sales of Real Estate The Company accounts for the sale of real estate assets and any related gain recognition in accordance with the accounting guidance applicable to sales of real estate, which establishes standards for recognition of profit on all real estate sales transactions, other than retail land sales. The Company recognizes the sale, and associated gain or loss from the disposition, provided that the earnings process is complete and the Company is not obligated to perform significant activities after the sale.
New Accounting Pronouncements, Policy [Policy Text Block]	Recently Issued Accounting Standards In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) ("ASU 2014-09"), which supersedes nearly all existing revenue recognition guidance. The standard clarifies the required factors that an entity must consider when recognizing revenue. The standard also requires additional disclosures concerning contracts with customers, judgments concerning revenue recognition, and assets recognized for the costs to obtain or fulfill a contract. ASU 2014-09 is effective for the Company beginning January 1, 2018. The Company is evaluating the impact ASU 2014-09 will have on its financial position and results of operations. In April 2015, the FASB issued ASU 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs ("ASU 2015-03"). The standard requires the costs for issuing debt to appear on a balance sheet as a direct deduction from the debt's value. In August 2015, the FASB issued ASU 2015-15, Interest - Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurements of Debt Issuance Costs Associated with Line-of-Credit Arrangements . The standard allows companies to elect to continue to classify costs related to a credit facility as an asset, and the Company has elected to do so. ASU 2015-03 is effective for the Company beginning January 1, 2016 and the standard allows for early adoption. The Company has adopted ASU 2015-03 as of December 31, 2015 and the standard has been applied retrospectively. See "Change in Accounting Principle" above. In February 2015, the FASB issued ASU 2015-02, Amendments to the Consolidation Analysis (Topic 810) ("ASU 2015-02"). The standard requires that all entities re-evaluate and revise consolidation documentation for limited partnerships and similar legal entities. It makes changes to both the variable interest model and voting model. ASU 2015-02 is effective for the Company beginning January 1, 2016. The standard allows for either a full retrospective or a modified retrospective approach to adoption. The Company does not believe that ASU 2015-02 will have a material impact on its financial position and results of operations. In February 2016, the FASB issued ASU 2016-02, ‘‘ Leases ’’ ("ASU 2016-02"). ASU 2016-02 amends the existing accounting standards for lease accounting, including requiring lessees to recognize most leases on their balance sheets and making targeted changes to lessor accounting. ASU 2016-02 is effective for the Company beginning January 1, 2019. Early adoption of ASU 2016-02 is permitted. The standard requires a modified retrospective transition approach for all leases existing at, or entered into after, the date of initial application, with an option to use certain transition relief. The Company is evaluating the impact ASU 2016-02 will have on its financial position and results of operations.
Liberty Property Limited Partnership [Member]
Earnings Per Share, Basic and Diluted [Line Items]
Earnings Per Share, Policy [Policy Text Block]	Earnings Per Unit of the Operating Partnership Basic earnings per unit is calculated by dividing the income available to common unitholders for the period by the weighted average number of common units outstanding during the period using the two class method. Diluted earnings per unit is calculated by dividing the income available to common unitholders for the period by the weighted average number of common and dilutive securities outstanding during the period.

Accounting for the Impairment35

Accounting for the Impairment or Disposal of Long-Lived Assets (Policies)	12 Months Ended
	Dec. 31, 2015
Accounting for the Impairment or Disposal of Long-Lived Assets [Abstract]
Interest Expense Allocated to Discontinued Operations, Policy [Policy Text Block]	Interest expense has been allocated to discontinued operations. The allocation of interest expense to discontinued operations was based on the ratio of net assets sold and held for sale (without continuing involvement) to the sum of total net assets plus consolidated debt.
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]	The Company has evaluated each of the properties and land held for development and has determined that there are no additional valuation adjustments necessary at December 31, 2015 .

Summary of Significant Accoun36

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]	The accompanying consolidated balance sheet and statement of equity of the Trust has been restated to correct the misclassification as follows (in thousands except share amounts): December 31, January 1, 2014 2013 2013 Common shares of beneficial interest (as previously reported) $ 150 $ 148 $ 119 Impact of reclassification (1 ) (1 ) (1 ) Common shares of beneficial interest (as adjusted and currently reported) $ 149 $ 147 $ 118 Additional paid-in capital (as previously reported) $ 3,740,594 $ 3,669,618 $ 2,687,701 Impact of reclassification (51,950 ) (51,950 ) (51,950 ) Additional paid-in capital (as adjusted and currently reported) $ 3,688,644 $ 3,617,668 $ 2,635,751 Common shares in treasury, at cost (as previously reported) $ (51,951 ) $ (51,951 ) $ (51,951 ) Impact of reclassification 51,951 51,951 51,951 Common shares in treasury, at cost (as adjusted and currently reported) $ — $ — $ — Number of common shares (as previously reported) 149,807,179 147,846,801 119,720,776 Impact of reclassification (1,249,909 ) (1,249,909 ) (1,249,909 ) Number of common shares (as adjusted and currently reported) 148,557,270 146,596,892 118,470,867
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]	The following summarizes the fair value of the Company's mortgage loans and unsecured notes at December 31, 2014 and December 31, 2015 (in thousands): Mortgage Loans Unsecured Notes Carrying Value Fair Value Carrying Value Fair Value As of December 31, 2014 $ 484,852 $ 501,231 $ 2,498,021 $ 2,704,069 As of December 31, 2015 $ 307,908 $ 306,334 $ 2,580,108 $ 2,616,395
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]	The following table presents the impact of the change in accounting principle to the consolidated balance sheets of the Trust and the Operating Partnership as of December 31, 2014 (in thousands): As of December 31, 2014 Deferred financing and leasing costs, net Mortgage loans, net Unsecured notes, net As previously reported $ 206,286 $ 487,301 $ 2,509,094 Impact of change in accounting principle (13,522 ) (2,449 ) (11,073 ) As adjusted and currently reported $ 192,764 $ 484,852 $ 2,498,021 The following table presents the impact of the change in accounting principle to the consolidated balance sheets of the Trust and the Operating Partnership as of December 31, 2015 (in thousands): As of December 31, 2015 Deferred financing and leasing costs, net Mortgage loans, net Unsecured notes, net As would have been reported prior to change in accounting principle $ 206,327 $ 309,711 $ 2,592,523 Impact of change in accounting principle (14,218 ) (1,803 ) (12,415 ) As reported $ 192,109 $ 307,908 $ 2,580,108

Income per Common Share of th37

Income per Common Share of the Trust (Tables)	12 Months Ended
	Dec. 31, 2015
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	The following table sets forth the computation of basic and diluted income per common share of the Trust (in thousands except per share amounts): 2015 2014 Income (Numerator) Weighted Average Shares (Denominator) Per Share Income (Numerator) Weighted Average Shares (Denominator) Per Share Income from continuing operations net of noncontrolling interest - basic $ 238,039 148,243 $ 1.61 $ 170,471 147,216 $ 1.16 Dilutive shares for long-term compensation plans — 600 — 670 Income from continuing operations net of noncontrolling interest - diluted $ 238,039 148,843 $ 1.60 $ 170,471 147,886 $ 1.15 Discontinued operations net of noncontrolling interest - basic $ — 148,243 $ — $ 47,439 147,216 $ 0.32 Dilutive shares for long-term compensation plans — 600 — 670 Discontinued operations net of noncontrolling interest - diluted $ — 148,843 $ — $ 47,439 147,886 $ 0.32 Net income available to common shareholders - basic $ 238,039 148,243 $ 1.61 $ 217,910 147,216 $ 1.48 Dilutive shares for long-term compensation plans — 600 — 670 Net income available to common shareholders - diluted $ 238,039 148,843 $ 1.60 $ 217,910 147,886 $ 1.47 2013 Income (Numerator) Weighted Average Shares (Denominator) Per Share Income from continuing operations net of noncontrolling interest - basic $ 91,274 130,180 $ 0.70 Dilutive shares for long-term compensation plans — 729 Income from continuing operations net of noncontrolling interest - diluted $ 91,274 130,909 $ 0.70 Discontinued operations net of noncontrolling interest - basic $ 118,464 130,180 $ 0.91 Dilutive shares for long-term compensation plans — 729 Discontinued operations net of noncontrolling interest - diluted $ 118,464 130,909 $ 0.90 Net income available to common shareholders - basic $ 209,738 130,180 $ 1.61 Dilutive shares for long-term compensation plans — 729 Net income available to common shareholders - diluted $ 209,738 130,909 $ 1.60

Income per Common Unit of the38

Income per Common Unit of the Operating Partnership (Tables)	12 Months Ended
	Dec. 31, 2015
Earnings Per Unit, Basic and Diluted [Line Items]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	The following table sets forth the computation of basic and diluted income per common share of the Trust (in thousands except per share amounts): 2015 2014 Income (Numerator) Weighted Average Shares (Denominator) Per Share Income (Numerator) Weighted Average Shares (Denominator) Per Share Income from continuing operations net of noncontrolling interest - basic $ 238,039 148,243 $ 1.61 $ 170,471 147,216 $ 1.16 Dilutive shares for long-term compensation plans — 600 — 670 Income from continuing operations net of noncontrolling interest - diluted $ 238,039 148,843 $ 1.60 $ 170,471 147,886 $ 1.15 Discontinued operations net of noncontrolling interest - basic $ — 148,243 $ — $ 47,439 147,216 $ 0.32 Dilutive shares for long-term compensation plans — 600 — 670 Discontinued operations net of noncontrolling interest - diluted $ — 148,843 $ — $ 47,439 147,886 $ 0.32 Net income available to common shareholders - basic $ 238,039 148,243 $ 1.61 $ 217,910 147,216 $ 1.48 Dilutive shares for long-term compensation plans — 600 — 670 Net income available to common shareholders - diluted $ 238,039 148,843 $ 1.60 $ 217,910 147,886 $ 1.47 2013 Income (Numerator) Weighted Average Shares (Denominator) Per Share Income from continuing operations net of noncontrolling interest - basic $ 91,274 130,180 $ 0.70 Dilutive shares for long-term compensation plans — 729 Income from continuing operations net of noncontrolling interest - diluted $ 91,274 130,909 $ 0.70 Discontinued operations net of noncontrolling interest - basic $ 118,464 130,180 $ 0.91 Dilutive shares for long-term compensation plans — 729 Discontinued operations net of noncontrolling interest - diluted $ 118,464 130,909 $ 0.90 Net income available to common shareholders - basic $ 209,738 130,180 $ 1.61 Dilutive shares for long-term compensation plans — 729 Net income available to common shareholders - diluted $ 209,738 130,909 $ 1.60
Liberty Property Limited Partnership [Member]
Earnings Per Unit, Basic and Diluted [Line Items]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	The following table sets forth the computation of basic and diluted income per common unit of the Operating Partnership (in thousands, except per unit amounts): 2015 2014 Income (Numerator) Weighted Average Units (Denominator) Per Unit Income (Numerator) Weighted Average Units (Denominator) Per Unit Income from continuing operations net of noncontrolling interest - consolidated joint ventures $ 244,197 $ 175,035 Less: Preferred unit distributions (472 ) (472 ) Income from continuing operations available to common unitholders - basic $ 243,725 151,783 $ 1.61 $ 174,563 150,770 $ 1.16 Dilutive units for long-term compensation plans — 600 — 670 Income from continuing operations available to common unitholders - diluted $ 243,725 152,383 $ 1.60 $ 174,563 151,440 $ 1.15 Income from discontinued operations - basic $ — 151,783 $ — $ 48,581 150,770 $ 0.32 Dilutive units for long-term compensation plans — 600 — 670 Income from discontinued operations - diluted $ — 152,383 $ — $ 48,581 151,440 $ 0.32 Income available to common unitholders - basic $ 243,725 151,783 $ 1.61 $ 223,144 150,770 $ 1.48 Dilutive units for long-term compensation plans — 600 — 670 Income available to common unitholders - diluted $ 243,725 152,383 $ 1.60 $ 223,144 151,440 $ 1.47 2013 Income (Numerator) Weighted Average Units (Denominator) Per Unit Income from continuing operations net of noncontrolling interest - consolidated joint ventures $ 97,102 Less: Preferred unit distributions (2,119 ) Excess of preferred unit redemption over carrying amount (1,236 ) Income from continuing operations available to common unitholders - basic $ 93,747 133,858 $ 0.70 Dilutive units for long-term compensation plans — 729 Income from continuing operations available to common unitholders - diluted $ 93,747 134,587 $ 0.70 Income from discontinued operations - basic $ 121,839 133,858 $ 0.91 Dilutive units for long-term compensation plans — 729 Income from discontinued operations - diluted $ 121,839 134,587 $ 0.90 Income available to common unitholders - basic $ 215,586 133,858 $ 1.61 Dilutive units for long-term compensation plans — 729 Income available to common unitholders - diluted $ 215,586 134,587 $ 1.60

Accumulated Other Comprehensi39

Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The following table sets forth the components of Accumulated Other Comprehensive Loss (in thousands): December 31, 2015 2014 Foreign Currency Translation: Beginning balance $ (5,823 ) $ 8,592 Translation adjustment (11,433 ) (14,415 ) Ending balance (17,256 ) (5,823 ) Derivative Instruments: Beginning balance (377 ) 1,584 Unrealized loss (1,884 ) (3,419 ) Reclassification adjustment (1) 1,396 1,458 Ending balance (865 ) (377 ) Total accumulated other comprehensive loss (18,121 ) (6,200 ) Less: portion included in noncontrolling interest – operating partnership 228 (52 ) Total accumulated other comprehensive loss included in shareholders' equity $ (17,893 ) $ (6,252 ) (1) Amounts reclassified out of Accumulated Other Comprehensive Loss/General & Limited Partner's Equity into contractual interest expense.

Real Estate (Tables)

Real Estate (Tables)	12 Months Ended
	Dec. 31, 2015
Real Estate [Abstract]
Real Estate Investment Property, Net [Table Text Block]	The carrying value of these properties by type as of December 31, 2015 and 2014 is as follows (in thousands): Land Building and Land and Accumulated Improvements Improvements Total Depreciation 2015 Industrial properties $ 824,140 $ 3,637,484 $ 4,461,624 $ 698,456 Office properties 360,787 1,494,164 1,854,951 450,472 2015 Total $ 1,184,927 $ 5,131,648 $ 6,316,575 $ 1,148,928 2014 Industrial properties $ 773,874 $ 3,513,534 $ 4,287,408 $ 620,967 Office properties 414,900 1,825,780 2,240,680 561,162 2014 Total $ 1,188,774 $ 5,339,314 $ 6,528,088 $ 1,182,129
Real Estate Properties Sold [Table Text Block]	Information on the operating properties the Company sold during the years ended December 31, 2015 and 2014 is as follows: 2015 Sales Reportable Segment Number of Buildings Acres of Developable Land (unaudited) Leaseable Square Feet (unaudited) Gross Proceeds (in thousands) Minnesota 2 — 222,642 $ 25,700 Orlando 1 — 713,585 35,500 Richmond/Hampton Roads 22 3 1,319,299 110,054 South Florida 1 — 99,740 14,700 Southeastern PA 46 20 2,724,489 316,583 Tampa 2 — 60,800 5,225 Other 7 — 569,618 37,371 Total 81 23 5,710,173 $ 545,133 2014 Sales Reportable Segment Number of Buildings Acres of Developable Land (unaudited) Leaseable Square Feet (unaudited) Gross Proceeds (in thousands) Houston 5 — 553,510 $ 29,721 Maryland 23 19 1,367,569 185,460 Minnesota 1 — 191,336 41,000 New Jersey 27 51 1,790,893 164,767 Orlando 4 — 588,678 116,750 Southeastern PA 3 — 113,833 12,225 Other 2 — 134,510 8,655 Total 65 70 4,740,329 $ 558,578 A summary of the results of operations for the properties classified as discontinued operations through the respective disposition dates is as follows (in thousands): For the Year Ended December 31, 2015 2014 2013 Revenues $ — $ 4,728 $ 113,586 Operating expenses — (2,258 ) (41,875 ) Interest and other income — 37 213 Interest expense — (557 ) (15,903 ) Depreciation and amortization — — (29,566 ) Income before gain on property dispositions — 1,950 26,455 Gain on property dispositions — 46,631 95,384 Net income $ — $ 48,581 $ 121,839
Schedule of Business Acquisitions, by Acquisition [Table Text Block]	Information on the operating properties and land parcels the Company acquired during the years ended December 31, 2015 and 2014 is as follows: 2015 Acquisitions Reportable Segment Number of Buildings Acres of Developable Land (unaudited) Leaseable Square Feet (unaudited) Purchase Price (in thousands) Houston 3 139 921,196 $ 86,497 Lehigh/Central PA — 281 — 62,402 Minnesota 1 188 197,956 24,541 Richmond/Hampton Roads — 94 — 1,727 Other 1 56 410,059 45,248 Total 5 758 1,529,211 $ 220,415 2014 Acquisitions Reportable Segment Number of Buildings Acres of Developable Land (unaudited) Leaseable Square Feet (unaudited) Purchase Price (in thousands) Carolinas 7 104 947,365 $ 61,293 Chicago/Milwaukee — 16 — 7,914 Houston — 110 — 26,210 Lehigh/Central PA — 85 — 15,307 Minnesota — 24 — 2,966 South Florida — 69 — 12,027 Other 3 94 981,243 86,476 Total 10 502 1,928,608 $ 212,193 The following table summarizes the estimated fair values of the assets acquired and liabilities assumed at the acquisition date. Assets Real estate: Land and land improvements $ 247,393 Building and improvements 1,152,717 Operating real estate 1,400,110 Intangible - in-place leases/market rent 97,396 Other assets 4,953 Total assets 1,502,459 Liabilities Mortgage loans 243,230 Other liabilities 32,958 Intangible - market rent 5,737 Total liabilities 281,925 Net assets acquired $ 1,220,534

Investments in Unconsolidated41

Investments in Unconsolidated Joint Ventures (Tables)	12 Months Ended
	Dec. 31, 2015
Equity Method Investments and Joint Ventures [Abstract]
Schedule of Condensed Balance Sheet of Equity Method Investments [Table Text Block]	The condensed balance sheets as of December 31, 2015 and 2014 and condensed statements of operations for the years ended December 31, 2015 , 2014 and 2013 for Liberty Venture I, LP, Kings Hill Unit Trust, Liberty Illinois, LP, Blythe Valley JV Sarl (no remaining interest as of December 31, 2013), Liberty Washington, LP, Liberty/Comcast, Liberty Property 18th & Arch, and the other unconsolidated joint ventures are as follows (in thousands): Condensed Balance Sheets: December 31, 2015 Liberty Kings Hill Liberty Liberty Liberty/ Liberty Property Venture I, LP Unit Trust Illinois, LP Washington, LP Comcast (3) 18th & Arch (2) Other Total Real estate assets $ 168,690 $ 164,603 $ 263,552 $ 534,132 $ 495,248 $ — $ 67,940 $ 1,694,165 Accumulated depreciation (37,473 ) (28,513 ) (54,308 ) (43,224 ) (111,067 ) — (10,950 ) (285,535 ) Real estate assets, net 131,217 136,090 209,244 490,908 384,181 — 56,990 1,408,630 Development in progress 34,878 — 22,998 — — 323,615 17,401 398,892 Land held for development 4,471 — 28,590 2,000 — — 42,495 77,556 Other assets 14,860 8,967 20,668 52,429 47,441 15,594 49,312 209,271 Total assets $ 185,426 $ 145,057 $ 281,500 $ 545,337 $ 431,622 $ 339,209 $ 166,198 $ 2,094,349 Debt $ 121,793 $ 99,603 $ 155,601 $ 314,080 $ 313,402 $ — $ 56,739 $ 1,061,218 Other liabilities 10,571 27,408 8,594 10,634 9,618 40,958 29,064 136,847 Equity 53,062 18,046 117,305 220,623 108,602 298,251 80,395 896,284 Total liabilities and equity $ 185,426 $ 145,057 $ 281,500 $ 545,337 $ 431,622 $ 339,209 $ 166,198 $ 2,094,349 Company's net investment in unconsolidated joint ventures (1) $ 11,563 $ 6,789 $ 18,221 $ 55,552 $ 20,465 $ 62,677 $ 43,187 $ 218,454 December 31, 2014 Liberty Kings Hill Liberty Liberty Liberty/ Liberty Property Venture I, LP Unit Trust Illinois, LP Washington, LP Comcast (3) 18th and Arch (2) Other Total Real estate assets $ 173,346 $ 173,707 $ 260,988 $ 603,413 $ 494,678 $ — $ 69,041 $ 1,775,173 Accumulated depreciation (32,752 ) (26,494 ) (48,191 ) (35,384 ) (97,189 ) — (9,651 ) (249,661 ) Real estate assets, net 140,594 147,213 212,797 568,029 397,489 — 59,390 1,525,512 Development in progress — — 17,973 — — 111,244 4,366 133,583 Land held for development 14,108 — 28,362 2,000 — — 39,438 83,908 Other assets 15,523 14,928 20,182 50,657 52,393 1,306 38,215 193,204 Total assets $ 170,225 $ 162,141 $ 279,314 $ 620,686 $ 449,882 $ 112,550 $ 141,409 $ 1,936,207 Debt $ 78,748 $ 91,356 $ 145,752 $ 318,367 $ 317,934 $ — $ 43,114 $ 995,271 Other liabilities 5,215 94,504 13,812 12,022 9,657 13,398 14,306 162,914 Equity 86,262 (23,719 ) 119,750 290,297 122,291 99,152 83,989 778,022 Total liabilities and equity $ 170,225 $ 162,141 $ 279,314 $ 620,686 $ 449,882 $ 112,550 $ 141,409 $ 1,936,207 Company's net investment in unconsolidated joint ventures (1) $ 20,010 $ 11,663 $ 18,692 $ 69,230 $ 23,153 $ 21,292 $ 44,792 $ 208,832
Schedule of Condensed Statements of Operations of Equity Method Investments [Table Text Block]	Condensed Statements of Operations: Year Ended December 31, 2015 Liberty Kings Hill Unit Liberty Liberty Liberty/ Liberty Property Venture I, LP Trust (4) Illinois, LP Washington, LP Comcast 18th & Arch (2) Other (5) Total Total revenue $ 23,708 $ 12,602 $ 26,085 $ 71,101 $ 68,444 $ — $ 9,387 $ 211,327 Operating expense 7,977 5,261 9,303 27,384 29,692 221 2,727 82,565 15,731 7,341 16,782 43,717 38,752 (221 ) 6,660 128,762 Interest (5,415 ) (6,116 ) (8,441 ) (17,353 ) (19,936 ) — (2,248 ) (59,509 ) Depreciation and amortization (6,399 ) (3,954 ) (7,406 ) (20,725 ) (14,442 ) — (1,840 ) (54,766 ) Other income/(expense) 68 45,604 29 531 (227 ) 30 9,925 55,960 Gain (loss) on sale/impairment 760 — — (56,792 ) — — — (56,032 ) Net income (loss) $ 4,745 $ 42,875 $ 964 $ (50,622 ) $ 4,147 $ (191 ) $ 12,497 $ 14,415 Company's equity in earnings (loss) of unconsolidated joint ventures $ 1,540 $ (425 ) $ 807 $ (7,314 ) $ 2,053 $ (29 ) $ 6,517 $ 3,149 Year Ended December 31, 2014 Liberty Kings Hill Liberty Liberty Liberty/ Liberty Property Venture I, LP Unit Trust Illinois, LP Washington, LP Comcast 18th & Arch (2) Other (5) Total Total revenue $ 19,277 $ 13,221 $ 25,181 $ 72,824 $ 63,580 $ — $ 8,923 $ 203,006 Operating expense 6,398 5,387 8,965 28,349 23,557 199 2,897 75,752 12,879 7,834 16,216 44,475 40,023 (199 ) 6,026 127,254 Interest (5,078 ) (6,110 ) (7,932 ) (18,612 ) (20,179 ) — (3,415 ) (61,326 ) Depreciation and amortization (5,757 ) (4,135 ) (7,380 ) (27,112 ) (14,591 ) — (1,891 ) (60,866 ) Other income/(expense) (17 ) 208 39 375 (278 ) (13 ) 9,090 9,404 Gain (loss) on sale/impairment — — 187 (172,691 ) — — — (172,504 ) Net income (loss) $ 2,027 $ (2,203 ) $ 1,130 $ (173,565 ) $ 4,975 $ (212 ) $ 9,810 $ (158,038 ) Company's equity in earnings (loss) of unconsolidated joint ventures $ 788 $ (288 ) $ 824 $ 2,251 $ 1,633 $ (33 ) $ 5,139 $ 10,314 Year Ended December 31, 2013 Liberty Kings Hill Liberty Liberty Liberty/ Venture I, LP Unit Trust Illinois, LP Washington, LP Comcast Other Total Total revenue $ 16,238 $ 12,701 $ 24,455 $ 75,821 $ 62,411 $ 8,415 $ 200,041 Operating expense 5,248 4,187 8,353 27,549 23,074 2,636 71,047 10,990 8,514 16,102 48,272 39,337 5,779 128,994 Interest (5,318 ) (5,133 ) (8,348 ) (18,946 ) (20,391 ) (2,933 ) (61,069 ) Depreciation and amortization (4,414 ) (3,829 ) (7,382 ) (28,392 ) (14,734 ) (1,870 ) (60,621 ) Other income/(expense) 53 71 38 122 (233 ) (37 ) 14 Loss from discontinued operations — (5,647 ) — (8,731 ) — — (14,378 ) Net income (loss) $ 1,311 $ (6,024 ) $ 410 $ (7,675 ) $ 3,979 $ 939 $ (7,060 ) Company's equity in earnings (loss) of unconsolidated joint ventures $ 530 $ (908 ) $ 618 $ 3,748 $ 1,406 $ 673 $ 6,067 (1) Differences between the Company's net investment in unconsolidated joint ventures and its underlying equity in the net assets of the venture are primarily a result of impairments related to the Company's investment in unconsolidated joint ventures, the deferral of gains associated with the sales of properties to joint ventures in which the Company retains an ownership interest and loans made to the joint ventures by the Company. These adjustments have resulted in an aggregate difference reducing the Company's investments in unconsolidated joint ventures by $4.5 million as of December 31, 2015 and increasing the Company's investment in unconsolidated joint ventures by $3.2 million as of December 31, 2014 . Differences between historical cost basis and the basis reflected at the joint venture level (other than loans) are typically depreciated over the life of the related asset. (2) Represents the combined results of two joint ventures related to the property at 18th and Arch Streets, Philadelphia. (3) The Company's maximum exposure to loss is equal to the Company's net investment in unconsolidated joint ventures as of December 31, 2015 and 2014, respectively. (4) Other income/(expense) for this joint venture reflects forgiveness of related party debt between the joint venture and its investment partners consistent with each partner's equity ownership. (5) Other income/(expense) for this group of joint ventures reflects gains related to the sales of land leasehold interests totaling $9.9 million and $9.1 million for the years ended December 31, 2015 and 2014, respectively.

Deferred Financing and Leasin42

Deferred Financing and Leasing Costs (Tables)	12 Months Ended
	Dec. 31, 2015
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Schedule of Finite-Lived Intangible Assets [Table Text Block]	Deferred financing and leasing costs were comprised of the following as of December 31, 2015 and 2014 (in thousands): December 31, 2015 2014 Deferred financing costs $ 11,917 $ 11,917 Deferred leasing costs 229,798 215,714 Market value intangible 20,178 18,082 Origination value intangible 106,014 103,512 367,907 349,225 Accumulated amortization: Deferred financing costs 8,713 7,278 Deferred leasing costs 97,840 100,702 Market value intangible 10,358 8,266 Origination value intangible 58,887 40,215 175,798 156,461 Deferred financing and leasing costs, net $ 192,109 $ 192,764

Deferred Financing and Leasin43

Deferred Financing and Leasing Costs Schedule of Finite-Lived Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2015
Leases, Acquired-in-Place [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	The aggregate amortization expense for origination value intangible asset for the next five years and thereafter is as follows (in thousands): 2016 $ 16,378 2017 11,950 2018 7,640 2019 4,134 2020 2,119 Thereafter 4,906 Total $ 47,127
Leases, Acquired-in-Place, Market Adjustment [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	The aggregate amortization of net market value intangible assets and liabilities is a decrease (increase) in rental revenue over the next five years and thereafter as follows (in thousands): 2016 $ 1,804 2017 1,705 2018 1,222 2019 709 2020 (115 ) Thereafter (1,641 ) Total $ 3,684

Indebtedness (Tables)

Indebtedness (Tables)	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Schedule of Debt [Table Text Block]	The scheduled principal amortization and maturities of the Company's mortgage loans, unsecured notes outstanding and the Credit Facility (as defined below) and the related weighted average interest rates at December 31, 2015 are as follows (in thousands, except percentages): Weighted Mortgages Average Principal Principal Unsecured Credit Interest Amortization Maturities Notes Facility Total Rate 2016 $ 9,518 $ 16,880 $ 300,000 $ — $ 326,398 5.53 % 2017 8,688 2,349 296,543 — 307,580 6.57 % 2018 6,470 27,102 100,000 259,000 392,572 3.26 % 2019 6,666 50,043 — — 56,709 4.00 % 2020 3,351 67,370 350,000 — 420,721 4.82 % 2021 2,326 65,091 — — 67,417 4.06 % 2022 2,172 — 400,000 — 402,172 4.13 % 2023 2,281 — 300,000 — 302,281 3.39 % 2024 2,385 — 450,000 — 452,385 4.40 % 2025 and thereafter 24,806 1,946 400,000 — 426,752 3.81 % Subtotal $ 68,663 $ 230,781 $ 2,596,543 $ 259,000 $ 3,154,987 4.42 % Reconciling items (1) 8,464 — (16,435 ) — (7,971 ) Total for consolidated balance sheet $ 77,127 $ 230,781 $ 2,580,108 $ 259,000 $ 3,147,016

Leasing Activity (Tables)

Leasing Activity (Tables)	12 Months Ended
	Dec. 31, 2015
Operating Leases, Future Minimum Payments Receivable [Abstract]
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	Future minimum rental payments due from tenants under noncancelable operating leases as of December 31, 2015 are as follows (in thousands): 2016 $ 526,956 2017 480,827 2018 415,765 2019 348,887 2020 284,738 Thereafter 1,219,397 Total $ 3,276,570

Noncontrolling Interest - Ope46

Noncontrolling Interest - Operating Partnership/Limited Partners' Equity - Preferred Units (Tables)	12 Months Ended
	Dec. 31, 2015
Noncontrolling Interest - Operating Partnership / LImited Partners' Equity - Preferred Units [Abstract]
Schedule of Preferred Units [Table Text Block]	As of December 31, 2015 , the Company had outstanding the following cumulative preferred units of the Operating Partnership: ISSUE AMOUNT UNITS LIQUIDATION PREFERENCE DIVIDEND RATE (in 000’s) Series I-2 $ 7,537 301 $25 6.25 %

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2015
Shareholders' Equity [Abstract]
Schedule of Taxability of Common Shares [Table Text Block]	The following unaudited table summarizes the taxability of common share distributions (taxability for 2015 is estimated): 2015 2014 2013 Ordinary dividend $ 1.4348 $ 1.2556 $ 1.4312 Capital gain - 20% 0.1112 — 0.0016 IRC Sec 1250 unrecapture gain - 25% 0.3372 0.3712 0.4672 Return of capital 0.0168 0.2732 — Total $ 1.9000 $ 1.9000 $ 1.9000
Preferred Unit Distributions [Table Text Block]	The Company paid the following Equity Preferred Unit distributions for the year ended December 31, 2013: Distributions (in millions) $1.6 Distribution per unit: Series E $1.21 Series F $1.32 Series G $1.33

Owners' Equity - Operating Pa48

Owners' Equity - Operating Partnership (Tables)	12 Months Ended
	Dec. 31, 2015
Class of Stock [Line Items]
Preferred Unit Distributions [Table Text Block]	The Company paid the following Equity Preferred Unit distributions for the year ended December 31, 2013: Distributions (in millions) $1.6 Distribution per unit: Series E $1.21 Series F $1.32 Series G $1.33
Liberty Property Limited Partnership [Member]
Class of Stock [Line Items]
Preferred Unit Distributions [Table Text Block]	The Operating Partnership paid the following Equity Preferred Unit distributions for the year ended December 31, 2013: Distributions (in millions) $1.6 Distribution per unit: Series E $1.21 Series F $1.32 Series G $1.33

Share Based Compensation (Table

Share Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	The following weighted-average assumptions were utilized in calculating the fair value of options granted during the periods indicated: Year Ended December 31, 2015 2014 2013 Risk-free interest rate 1.8% 1.6% 1.1% Dividend yield 5.2% 5.2% 5.4% Historical volatility factor 0.240 0.236 0.356 Weighted-average expected life 7 years 6 years 6 years
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]	A summary of the Company's share option activity and related information for the year ended December 31, 2015 follows: Options (000s) Weighted Average Exercise Price Outstanding January 1, 2015 2,492 $ 36.48 Granted 353 35.18 Exercised (65 ) 32.38 Forfeited (171 ) 41.53 Outstanding December 31, 2015 2,609 $ 36.08 Exercisable at December 31, 2015 1,795 $ 35.84
Schedule of Share-based Payment Award, Restricted Stock Units, Valuation Assumptions [Table Text Block]	The key assumptions used in the Monte Carlo simulation are as follows: Year Ended December 31, 2015 2014 2013 Risk-free interest rate 0.99% 0.68% 0.35% Volatility 17% 24% 26%
Schedule of Nonvested Share Activity [Table Text Block]	The Company's restricted LTI share activity for the year ended December 31, 2015 is as follows: Shares (000s) Weighted Avg. Grant Date Fair value Nonvested at January 1, 2015 753 $ 36.89 Granted 216 35.14 Vested (207 ) 35.61 Forfeited (39 ) 36.68 Nonvested at December 31, 2015 723 $ 36.75

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Future Minimum Rental Payments	Future minimum rental payments under the terms of all non-cancelable operating ground leases under which the Company is the lessee, as of December 31, 2015 , were as follows (in thousands): Year Amount 2016 $ 1,038 2017 1,038 2018 1,038 2019 1,038 2020 1,038 2021 though 2034 6,754 Total $ 11,944

Quarterly Results of Operatio51

Quarterly Results of Operations (Tables)	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Information [Table Text Block]	A summary of quarterly results of operations for the years ended December 31, 2015 and 2014 follows. QUARTER ENDED DEC. 31, SEPT. 30, JUNE 30, MAR. 31, DEC. 31, SEPT. 30, JUNE 30, MAR. 31, 2015 2015 2015 2015 2014 2014 2014 2014 Operating revenue $ 199,382 $ 198,972 $ 203,518 $ 206,901 $ 203,685 $ 198,356 $ 192,960 $ 197,630 Income from continuing operations 82,363 93,695 36,526 31,862 84,193 35,318 29,811 26,260 Discontinued operations — — — — 306 133 296 47,846 Net income 82,363 93,695 36,526 31,862 84,499 35,451 30,107 74,106 Income per common share - basic (1) 0.55 0.61 0.24 0.21 0.56 0.23 0.20 0.49 Income per common share - diluted (1) 0.55 0.61 0.24 0.21 0.55 0.23 0.20 0.49 (1) The sum of quarterly financial data may vary from the annual data due to rounding.

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment [Table Text Block]	The operating information by reportable segment is as follows (in thousands): Year ended December 31, 2015 2014 2013 Operating revenue Carolinas $ 40,917 $ 35,870 $ 30,243 Chicago/Milwaukee 37,431 33,068 18,083 Houston 54,031 49,309 37,773 Lehigh/Central PA 133,473 118,145 101,101 Minnesota 47,932 54,892 62,415 Orlando 21,802 32,674 31,400 Philadelphia 40,490 35,238 31,690 Richmond/Hampton Roads 31,033 40,911 40,247 South Florida 50,638 48,804 38,464 Southeastern PA 147,712 148,714 165,248 Tampa 54,744 53,725 52,230 United Kingdom 15,135 16,360 7,669 Other 133,345 130,013 142,402 Segment-level operating revenue 808,683 797,723 758,965 Reconciliation to total operating revenues Discontinued operations — (4,728 ) (113,586 ) Other 90 (364 ) 551 Total operating revenue $ 808,773 $ 792,631 $ 645,930 Net operating income Carolinas $ 28,594 $ 24,578 $ 20,434 Chicago/Milwaukee 24,851 20,856 11,726 Houston 31,159 29,134 22,632 Lehigh/Central PA 94,972 82,050 68,504 Minnesota 20,112 26,464 30,016 Orlando 14,842 21,472 20,506 Philadelphia 29,679 26,722 23,587 Richmond/Hampton Roads 19,255 24,357 24,063 South Florida 28,308 27,947 20,943 Southeastern PA 80,458 81,183 91,193 Tampa 34,133 33,776 33,042 United Kingdom 10,486 10,704 2,597 Other 87,925 83,991 81,435 Segment-level net operating income 504,774 493,234 450,678 Reconciliation to income from continuing operations Interest expense (1) (135,779 ) (152,444 ) (143,018 ) Depreciation/amortization expense (1) (2) (166,500 ) (177,715 ) (138,128 ) Impairment - real estate assets (18,244 ) (117 ) (248 ) Gain on property dispositions 100,314 45,147 — Equity in earnings of unconsolidated joint ventures 3,149 10,314 6,067 General and administrative expense (1) (2) (44,529 ) (38,041 ) (50,998 ) Discontinued operations excluding gain on property dispositions — (1,950 ) (26,455 ) Income taxes (2) (2,911 ) (2,781 ) (2,748 ) Other 4,172 (65 ) 2,605 Income from continuing operations $ 244,446 $ 175,582 $ 97,755 (1) Includes activity on discontinued operations. (2) Excludes costs which are included in determining segment-level net operating income.
Schedule of Segment Reporting Information, by Segment, Depreciation and Amortization [Table Text Block]	The amount of depreciation and amortization expense related to tenant improvement and lease transaction costs within each reporting segment for the Net operating income calculation is as follows (in thousands): Year ended December 31, 2015 2014 2013 Carolinas $ 2,413 $ 2,329 $ 1,935 Chicago/Milwaukee 1,161 466 251 Houston 4,466 3,988 3,200 Lehigh/Central PA 11,641 10,157 9,781 Minnesota 4,986 4,478 5,797 Orlando 1,963 3,116 3,037 Philadelphia 2,220 1,803 1,729 Richmond/Hampton Roads 2,894 4,278 4,156 South Florida 3,572 2,824 2,979 Southeastern PA 12,346 12,272 15,040 Tampa 3,872 3,384 3,033 United Kingdom 292 177 172 Other 8,249 5,631 13,439 Depreciation and amortization of tenant improvement and lease transaction costs $ 60,075 $ 54,903 $ 64,549
Revenue from External Customers by Products and Services [Table Text Block]	The Company's operating revenue by product type and by reportable segment for the years ended December 31, 2015 , 2014 and 2013 is as follows (in thousands): Year Ended December 31, 2015 December 31, 2014 December 31, 2013 Industrial Office Total Industrial Office Total Industrial Office Total Carolinas $ 40,917 $ — $ 40,917 $ 35,870 $ — $ 35,870 $ 30,243 $ — $ 30,243 Chicago/Milwaukee 37,431 — 37,431 33,068 — 33,068 18,083 — 18,083 Houston 53,802 229 54,031 49,309 — 49,309 37,773 — 37,773 Lehigh/Central PA 131,168 2,305 133,473 115,821 2,324 118,145 98,715 2,386 101,101 Minnesota 24,721 23,211 47,932 25,378 29,514 54,892 32,043 30,372 62,415 Orlando 20,056 1,746 21,802 18,635 14,039 32,674 16,535 14,865 31,400 Philadelphia 11,809 28,681 40,490 10,072 25,166 35,238 9,534 22,156 31,690 Richmond/Hampton Roads 21,158 9,875 31,033 20,924 19,987 40,911 19,073 21,174 40,247 South Florida 20,740 29,898 50,638 18,603 30,201 48,804 7,955 30,509 38,464 Southeastern PA 28,457 119,255 147,712 28,895 119,819 148,714 27,076 138,172 165,248 Tampa 26,353 28,391 54,744 25,451 28,274 53,725 24,331 27,899 52,230 United Kingdom 12,104 3,031 15,135 13,090 3,270 16,360 4,205 3,464 7,669 Other (1) 86,180 47,165 133,345 82,672 47,341 130,013 43,355 99,047 142,402 $ 514,896 $ 293,787 808,683 $ 477,788 $ 319,935 797,723 $ 368,921 $ 390,044 758,965 Reconciliation to total operating revenue Discontinued operations — (4,728 ) (113,586 ) Corporate other 90 (364 ) 551 Total operating revenue $ 808,773 $ 792,631 $ 645,930 (1) A substantial portion of the buildings contributing to office operating revenue in 2013 were sold in conjunction with the Portfolio Sale. See Footnote 19.
Reconciliation of Assets from Segment to Consolidated [Table Text Block]	The Company's total assets by reportable segment as of December 31, 2015 and 2014 is as follows (in thousands): As of December 31, 2015 2014 Carolinas $ 338,273 $ 325,690 Chicago/Milwaukee 429,390 422,531 Houston 522,285 418,154 Lehigh/Central PA 1,157,468 1,023,641 Minnesota 346,840 333,506 Orlando 138,181 160,899 Philadelphia 444,889 366,243 Richmond/Hampton Roads 128,825 250,205 South Florida 409,501 400,034 Southeastern PA 448,523 698,163 Tampa 326,670 335,652 United Kingdom 215,850 231,271 Other 1,586,481 1,553,250 Segment-level total assets 6,493,176 6,519,239 Corporate Other 64,453 92,775 Total assets $ 6,557,629 $ 6,612,014
Schedule of Long-Lived Assets, by Geographical Areas [Table Text Block]	The Company's real estate assets by reportable segment as of December 31, 2015 and 2014 is as follows (in thousands): As of December 31, 2015 2014 Carolinas $ 322,707 $ 309,822 Chicago/Milwaukee 387,182 383,494 Houston 483,432 398,080 Lehigh/Central PA 1,096,195 958,886 Minnesota 322,627 302,830 Orlando 119,356 139,218 Philadelphia 282,159 255,313 Richmond/Hampton Roads 123,641 238,670 South Florida 389,534 378,398 Southeastern PA 410,195 636,280 Tampa 306,822 317,106 United Kingdom 174,390 182,588 Other 1,447,322 1,391,744 Total real estate assets $ 5,865,562 $ 5,892,429
Schedule of Expenditures on Long-Lived Assets [Table Text Block]	The Company incurred the following costs related to its long-lived assets for the years ended December 31, 2015 , 2014 and 2013 (in thousands): Year Ended December 31, 2015 2014 2013 Costs incurred on long-lived assets Carolinas $ 21,993 $ 72,252 $ 15,582 Chicago/Milwaukee 13,483 21,698 248,640 Houston 96,681 70,903 116,024 Lehigh/Central PA 165,319 105,725 161,925 Minnesota 41,259 28,966 38,434 Orlando 5,344 7,827 10,953 Philadelphia 34,122 32,012 17,941 Richmond/Hampton Roads 9,182 10,348 15,880 South Florida 34,089 30,063 148,165 Southeastern PA 9,047 39,638 39,590 Tampa 4,161 7,262 28,655 United Kingdom 12,960 16,298 155,829 Other 125,412 172,495 897,831 Total costs incurred on long-lived assets $ 573,052 $ 615,487 $ 1,895,449

Accounting for the Impairment53

Accounting for the Impairment or Disposal of Long-Lived Assets (Tables)	12 Months Ended
	Dec. 31, 2015
Accounting for the Impairment or Disposal of Long-Lived Assets [Abstract]
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]	Information on the operating properties the Company sold during the years ended December 31, 2015 and 2014 is as follows: 2015 Sales Reportable Segment Number of Buildings Acres of Developable Land (unaudited) Leaseable Square Feet (unaudited) Gross Proceeds (in thousands) Minnesota 2 — 222,642 $ 25,700 Orlando 1 — 713,585 35,500 Richmond/Hampton Roads 22 3 1,319,299 110,054 South Florida 1 — 99,740 14,700 Southeastern PA 46 20 2,724,489 316,583 Tampa 2 — 60,800 5,225 Other 7 — 569,618 37,371 Total 81 23 5,710,173 $ 545,133 2014 Sales Reportable Segment Number of Buildings Acres of Developable Land (unaudited) Leaseable Square Feet (unaudited) Gross Proceeds (in thousands) Houston 5 — 553,510 $ 29,721 Maryland 23 19 1,367,569 185,460 Minnesota 1 — 191,336 41,000 New Jersey 27 51 1,790,893 164,767 Orlando 4 — 588,678 116,750 Southeastern PA 3 — 113,833 12,225 Other 2 — 134,510 8,655 Total 65 70 4,740,329 $ 558,578 A summary of the results of operations for the properties classified as discontinued operations through the respective disposition dates is as follows (in thousands): For the Year Ended December 31, 2015 2014 2013 Revenues $ — $ 4,728 $ 113,586 Operating expenses — (2,258 ) (41,875 ) Interest and other income — 37 213 Interest expense — (557 ) (15,903 ) Depreciation and amortization — — (29,566 ) Income before gain on property dispositions — 1,950 26,455 Gain on property dispositions — 46,631 95,384 Net income $ — $ 48,581 $ 121,839
Asset Impairment Charges [Table Text Block]	The impairment losses are for operating properties or land parcels and were in the reportable segments and for the amounts as indicated below (in thousands): Year Ended December 31, Reportable Segment 2015 2014 2013 Richmond/Hampton Roads $ 13,755 $ — $ — Southeastern PA 2,328 106 Tampa — — 248 United Kingdom — — — Other 2,161 11 872 Total $ 18,244 $ 117 $ 1,120

Business Combination (Tables)

Business Combination (Tables)	12 Months Ended
	Dec. 31, 2015
Business Acquisition [Line Items]
Estimated fair values of assets acquired and liabilities assumed	Information on the operating properties and land parcels the Company acquired during the years ended December 31, 2015 and 2014 is as follows: 2015 Acquisitions Reportable Segment Number of Buildings Acres of Developable Land (unaudited) Leaseable Square Feet (unaudited) Purchase Price (in thousands) Houston 3 139 921,196 $ 86,497 Lehigh/Central PA — 281 — 62,402 Minnesota 1 188 197,956 24,541 Richmond/Hampton Roads — 94 — 1,727 Other 1 56 410,059 45,248 Total 5 758 1,529,211 $ 220,415 2014 Acquisitions Reportable Segment Number of Buildings Acres of Developable Land (unaudited) Leaseable Square Feet (unaudited) Purchase Price (in thousands) Carolinas 7 104 947,365 $ 61,293 Chicago/Milwaukee — 16 — 7,914 Houston — 110 — 26,210 Lehigh/Central PA — 85 — 15,307 Minnesota — 24 — 2,966 South Florida — 69 — 12,027 Other 3 94 981,243 86,476 Total 10 502 1,928,608 $ 212,193 The following table summarizes the estimated fair values of the assets acquired and liabilities assumed at the acquisition date. Assets Real estate: Land and land improvements $ 247,393 Building and improvements 1,152,717 Operating real estate 1,400,110 Intangible - in-place leases/market rent 97,396 Other assets 4,953 Total assets 1,502,459 Liabilities Mortgage loans 243,230 Other liabilities 32,958 Intangible - market rent 5,737 Total liabilities 281,925 Net assets acquired $ 1,220,534
Unaudited pro forma	The following unaudited pro forma condensed income statement information has been prepared as if the Cabot Acquisition, the Trust’s August 2013 common share offering and the Operating Partnership’s September 2013 senior note offering had been completed on January 1, 2013. The pro forma condensed consolidated financial information does not purport to represent what the Company’s results of operations would have been assuming the completion of the Cabot Acquisition and the related financing activities had occurred on January 1, 2013 nor do they purport to project the results of operations of the Company for any future period (in thousands): For the Year Ended December 31, 2013 Total operating revenue $ 750,896 Net income available to common shareholders $ 211,601

Derivative Instruments (Tables)

Derivative Instruments (Tables)	12 Months Ended
	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments, Gain (Loss) [Table Text Block]	The following table presents the location in the financial statements of the gains or losses recognized related to the Company’s cash flow hedges for the year ended December 31, 2015 and 2014 and from November 22, 2013 to December 31, 2013 (in thousands): Year Ended November 22, 2013 - December 31, 2013 December 31, 2015 December 31, 2014 Amount of (loss) gain related to the effective portion recognized in other comprehensive (loss) income $ (1,884 ) $ (3,400 ) $ 1,600 Amount of loss related to the effective portion reclassified to interest expense $ (1,396 ) $ (1,500 ) $ — Amount of (loss) gain related to the ineffective portion recognized in interest expense $ (91 ) $ (82 ) $ 266

Supplemental Disclosure to St56

Supplemental Disclosure to Statements of Cash Flows (Tables)	12 Months Ended
	Dec. 31, 2015
Supplemental Disclosure to Statements of Cash Flows [Abstract]
Supplemental Disclosure to Statements of Cash Flows	The following are supplemental disclosures to the statements of cash flows for the years ended December 31, 2015 , 2014 and 2013 (amounts in thousands): 2015 2014 2013 Write-off of fully depreciated/amortized property and deferred costs $ 42,339 $ 38,131 $ 22,269 Write-off of depreciated property and deferred costs due to sale/demolition 252,017 173,083 202,695 Write-off of preferred units costs due to redemption — — 1,214 Assumption of mortgage loans in connection with the acquisition of properties — — 229,751 Increase in investments in and advances to unconsolidated joint ventures due to disposition/development activity — (11,948 ) — Changes in accrued development capital expenditures 11,964 6,264 17,053 Unrealized (loss) gain on cash flow hedge (488 ) (3,419 ) 1,584

Organization and Basis of Pre57

Organization and Basis of Presentation (Narrative) (Details)	Dec. 31, 2015
Organization and Basis of Presentation [Abstract]
Ownership interest in operating partnership - Limited Partnership	97.70%

Summary of Significant Accoun58

Summary of Significant Accounting Policies Error Correction (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Common shares of beneficial interest, $.001 par value, 283,987,000 shares authorized; 147,577,984 and 148,557,270 shares issued and outstanding as of December 31, 2015 and December 31, 2014, respectively	$ 148	$ 149	$ 147	$ 118
Additional Paid in Capital	$ 3,669,627	3,688,644	3,617,668	2,635,751
Common shares in treasury, at cost		$ 0	$ 0	$ 0
Common shares outstanding	147,577,984	148,557,270	146,596,892	118,470,867
Adjustment to prior period balance [Member] | Parent balance sheet, equity reclassification [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Common shares of beneficial interest, $.001 par value, 283,987,000 shares authorized; 147,577,984 and 148,557,270 shares issued and outstanding as of December 31, 2015 and December 31, 2014, respectively		$ (1)	$ (1)	$ (1)
Additional Paid in Capital		(51,950)	(51,950)	(51,950)
Common shares in treasury, at cost		$ 51,951	$ 51,951	$ 51,951
Common shares outstanding		(1,249,909)	(1,249,909)	(1,249,909)
Previously reported amounts [Member] | Parent balance sheet, equity reclassification [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Common shares of beneficial interest, $.001 par value, 283,987,000 shares authorized; 147,577,984 and 148,557,270 shares issued and outstanding as of December 31, 2015 and December 31, 2014, respectively		$ 150	$ 148	$ 119
Additional Paid in Capital		3,740,594	3,669,618	2,687,701
Common shares in treasury, at cost		$ (51,951)	$ (51,951)	$ (51,951)
Common shares outstanding		149,807,179	147,846,801	119,720,776

Real Estate and Depreciation (D

Real Estate and Depreciation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Construction related payables	$ 42.9	$ 41.5
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Useful Life	40 years
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Compensation costs, capitalized	$ 5.5	$ 5.1	$ 3.3
Minimum [Member] | Capital improvements
Property, Plant and Equipment [Line Items]
Useful Life	15 years
Minimum [Member] | Equipment
Property, Plant and Equipment [Line Items]
Useful Life	5 years
Maximum [Member] | Capital improvements
Property, Plant and Equipment [Line Items]
Useful Life	20 years
Maximum [Member] | Equipment
Property, Plant and Equipment [Line Items]
Useful Life	10 years

Investments in Unconsolidated60

Investments in Unconsolidated Joint Ventures Valuation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Investment Holdings, Other than Securities [Line Items]
Other than Temporary Impairment Losses, Investments in joint ventures	$ 0	$ 0	$ 0

Accounts Receivable_Deferred Re

Accounts Receivable/Deferred Rent Receivable (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounts Receivable and Deferred Rent Receivable [Abstract]
Allowance for Doubtful Accounts Receivable	$ 6.9	$ 7.4
Provision for Doubtful Accounts	$ 2	$ 1.7	$ 1.8

Summary of Significant Accoun62

Summary of Significant Accounting Policies Deferred Financing and Leasing Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Deferred Financing and Leasing Costs [Abstract]
Capitalized compensation, leasing costs	$ 4.6	$ 3.9	$ 2.8

Fair Value of Financial Instrum

Fair Value of Financial Instruments (Details) - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Carrying Value [Member] | Unsecured Debt [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Mortgage Loans and Unsecured Notes Fair Value	$ 2,580,108	$ 2,498,021
Carrying Value [Member] | Mortgages [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Mortgage Loans and Unsecured Notes Fair Value	307,908	484,852
Estimate of Fair Value Measurement [Member] | Unsecured Debt [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Mortgage Loans and Unsecured Notes Fair Value	2,616,395	2,704,069
Estimate of Fair Value Measurement [Member] | Mortgages [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Mortgage Loans and Unsecured Notes Fair Value	$ 306,334	$ 501,231

Income Taxes (Details)

Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Contingency [Line Items]
Real Estate, Federal Income Tax Basis	$ 7,600,000,000	$ 7,500,000,000
Distribution of REIT Taxable Income	100.00%
Income Tax Expense (Benefit)	$ 0
Number of years subequent to a failed REIT Qualifing Test the Company would not be Qualified as a REIT	4 years
Liability for Uncertain Tax Positions, Current	$ 0
Income Tax Examination, Penalties and Interest Expense	0	0	$ 0
Income Tax Examination, Penalties and Interest Accrued	0	$ 0
Taxable REIT Subsidiary [Member]
Income Tax Contingency [Line Items]
Operating Loss Carryforwards	$ 29,100,000
Operating Loss Carryforwards, Expiration Dates	Jan. 1, 2018
Valuation Allowance, Amount	$ 29,100,000

Summary of Significant Accoun65

Summary of Significant Accounting Policies Change in Accounting Principle (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred financing and leasing costs, net	$ 192,109	$ 192,764
Mortgage loans, net	307,908	484,852
Unsecured notes, net	2,580,108	2,498,021
Adjustments for New Accounting Principle, Early Adoption [Member] | Scenario, Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred financing and leasing costs, net	206,327	206,286
Mortgage loans, net	309,711	487,301
Unsecured notes, net	2,592,523	2,509,094
New Accounting Pronouncement, Early Adoption, Effect [Member] | Restatement Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred financing and leasing costs, net	(14,218)	(13,522)
Mortgage loans, net	(1,803)	(2,449)
Unsecured notes, net	$ (12,415)	$ (11,073)

Income per Common Share of th66

Income per Common Share of the Trust (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net Income Available to Common Stockholders, Basic [Abstract]
Income from continuing operations net of noncontrolling interest										$ 238,039	$ 170,471	$ 91,274
Discontinued operations net of noncontrolling interest										0	47,439	118,464
Net income available to common shareholders										$ 238,039	$ 217,910	$ 209,738
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Weighted Average Number of Shares Outstanding, Basic										148,243	147,216	130,180
Dilutive shares for long-term compensation plans										600	670	729
Weighted Average Number of Shares Outstanding, Diluted										148,843	147,886	130,909
Earnings Per Share, Basic [Abstract]
Income per common share - basic	[1]	$ 0.55	$ 0.61	$ 0.24	$ 0.21	$ 0.56	$ 0.23	$ 0.20	$ 0.49
Earnings Per Share, Diluted [Abstract]
Income per common share - diluted	[1]	$ 0.55	$ 0.61	$ 0.24	$ 0.21	$ 0.55	$ 0.23	$ 0.20	$ 0.49
Common shares [Member]
Earnings Per Share, Basic [Abstract]
Income from Continuing Operations, Per Basic Share										$ 1.61	$ 1.16	$ 0.70
Income from Discontinued Operations, Per Basic Share										0	0.32	0.91
Income per common share - basic										1.61	1.48	1.61
Earnings Per Share, Diluted [Abstract]
Income from Continuing Operations, Per Diluted Share										1.60	1.15	0.70
Income from Discontinued Operations, Per Diluted Share										0	0.32	0.90
Income per common share - diluted										$ 1.60	$ 1.47	$ 1.60
[1]	The sum of quarterly financial data may vary from the annual data due to rounding.

Income per Common Share of th67

Income per Common Share of the Trust - Anti-Dilutive (Details) - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Stock Option [Member]
Antidilutive Options Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Options Excluded from Computation of Earnings Per Share, Amount	1,500,000	850,000	959,000

Income per Common Share of th68

Income per Common Share of the Trust - Dilutive (Details) - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Stock Option [Member] | Common shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amount of Option Exercises in Period	65,000	44,000	504,000

Income per Common Share of th69

Income per Common Share of the Trust - Units and Distributions (Details) - Common shares [Member] - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Class of Stock [Line Items]
Increase in shares of the Trust/units of general partner from the conversion of limited partners' units	14,491	3,000	157,285
Distributions per common share	$ 1.90	$ 1.90	$ 1.90

Income per Common Unit of the70

Income per Common Unit of the Operating Partnership (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net Income Available to Common Unitholders, Basic [Abstract]
Income from continuing operations net of noncontrolling interest										$ 238,039	$ 170,471	$ 91,274
Excess of preferred unit redemption over carrying amount												(1,236)
Discontinued operations		$ 0	$ 0	$ 0	$ 0	$ 306	$ 133	$ 296	$ 47,846	0	48,581	121,839
Net income available to common shareholders										$ 238,039	$ 217,910	$ 209,738
Weighted Average Number of Units Outstanding, Diluted [Abstract]
Weighted Average Number of Shares Outstanding, Basic										148,243	147,216	130,180
Dilutive units for long-term compensation plans										600	670	729
Weighted Average Number of Shares Outstanding, Diluted										148,843	147,886	130,909
Earnings Per Share, Basic [Abstract]
Income per common share - basic	[1]	$ 0.55	$ 0.61	$ 0.24	$ 0.21	$ 0.56	$ 0.23	$ 0.20	$ 0.49
Earnings Per Share, Diluted [Abstract]
Income per common share - diluted	[1]	$ 0.55	$ 0.61	$ 0.24	$ 0.21	$ 0.55	$ 0.23	$ 0.20	$ 0.49
Liberty Property Limited Partnership [Member]
Net Income Available to Common Unitholders, Basic [Abstract]
Income from continuing operations net of noncontrolling interest										$ 244,197	$ 175,035	$ 97,102
Less: Preferred unit distributions										(472)	(472)	(2,119)
Excess of preferred unit redemption over carrying amount										0	0	(1,236)
Income from Continuing Operations available to Common Unitholders										243,725	174,563	93,747
Discontinued operations										0	48,581	121,839
Net income available to common shareholders										$ 243,725	$ 223,144	$ 215,586
Weighted Average Number of Units Outstanding, Diluted [Abstract]
Weighted Average Number of Shares Outstanding, Basic										151,783	150,770	133,858
Dilutive units for long-term compensation plans										600	670	729
Weighted Average Number of Shares Outstanding, Diluted										152,383	151,440	134,587
Liberty Property Limited Partnership [Member] | Common units [Member]
Earnings Per Share, Basic [Abstract]
Income from Continuing Operations, Per Basic Share										$ 1.61	$ 1.16	$ 0.70
Income from Discontinued Operations, Per Basic Share										0	0.32	0.91
Income per common share - basic										1.61	1.48	1.61
Earnings Per Share, Diluted [Abstract]
Income from Continuing Operations, Per Diluted Share										1.60	1.15	0.70
Income from Discontinued Operations, Per Diluted Share										0	0.32	0.90
Income per common share - diluted										$ 1.60	$ 1.47	$ 1.60
[1]	The sum of quarterly financial data may vary from the annual data due to rounding.

Income per Common Unit of the71

Income per Common Unit of the Operating Partnership - Anti-Dilutive (Details) - Stock Option [Member] - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Antidilutive Options Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Options Excluded from Computation of Earnings Per Unit, Amount	1,500,000	850,000	959,000
Liberty Property Limited Partnership [Member]
Antidilutive Options Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Options Excluded from Computation of Earnings Per Unit, Amount	1,500,000	850,000	959,000

Income per Common Unit of the72

Income per Common Unit of the Operating Partnership - Dilutive (Details) - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Liberty Property Limited Partnership [Member] | Stock Option [Member] | Common units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amount of Option Exercises in Period	65,000	44,000	504,000

Income per Common Unit of the73

Income per Common Unit of the Operating Partnership - Units and Distributions (Details) - Liberty Property Limited Partnership [Member] - Common units [Member] - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Class of Stock [Line Items]
Distributions per common unit	$ 1.90	$ 1.90	$ 1.90
Limited Partner [Member]
Class of Stock [Line Items]
Number of common units converted	14,491	3,000	157,285

Accumulated Other Comprehensi74

Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2012
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]
Beginning Balance		$ 3,086,377
Ending Balance		3,009,947	$ 3,086,377
Less: portion included in noncontrolling interest - operating partnership		3,086,377	3,086,377	$ 3,009,947	$ 3,086,377
Total accumulated other comprehensive loss included in shareholders' equity				2,952,928	3,027,672
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]
Beginning Balance		(5,823)	8,592
Other comprehensive income (loss), before reclassifications		(11,433)	(14,415)
Ending Balance		(17,256)	(5,823)
Less: portion included in noncontrolling interest - operating partnership		(5,823)	8,592	(17,256)	(5,823)
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]
Beginning Balance		(377)	1,584
Other comprehensive income (loss), before reclassifications		(1,884)	(3,419)
Reclassification adjustment	[1]	1,396	1,458
Ending Balance		(865)	(377)
Less: portion included in noncontrolling interest - operating partnership		(377)	1,584	(865)	(377)
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]
Beginning Balance		(6,200)
Ending Balance		(18,121)	(6,200)
Less: portion included in noncontrolling interest - operating partnership		(6,200)	(6,200)	(18,121)	(6,200)
AOCI Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]
Beginning Balance		(52)
Ending Balance		228	(52)
Less: portion included in noncontrolling interest - operating partnership		(52)	(52)	228	(52)
AOCI Attributable to Parent [Member]
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]
Beginning Balance		(6,252)	9,742
Ending Balance		(17,893)	(6,252)
Less: portion included in noncontrolling interest - operating partnership		$ (6,252)	$ 9,742	(17,893)	(6,252)	$ 2,900
Total accumulated other comprehensive loss included in shareholders' equity				$ (17,893)	$ (6,252)
[1]	Amounts reclassified out of Accumulated Other Comprehensive Loss/General & Limited Partner's Equity into contractual interest expense.

Real Estate (Details)

Real Estate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Real Estate Investment Property, at Cost [Abstract]
Building and improvements	$ 5,131,648	$ 5,339,314
Land and Land Improvements	1,184,927	1,188,774
Accumulated Depreciation	1,148,928	1,182,129
Total Real Estate	6,316,575	6,528,088
Depreciation	181,000	179,100	$ 162,500
Industrial Property [Member]
Real Estate Investment Property, at Cost [Abstract]
Building and improvements	3,637,484	3,513,534
Land and Land Improvements	824,140	773,874
Accumulated Depreciation	698,456	620,967
Total Real Estate	4,461,624	4,287,408
Office Building [Member]
Real Estate Investment Property, at Cost [Abstract]
Building and improvements	1,494,164	1,825,780
Land and Land Improvements	360,787	414,900
Accumulated Depreciation	450,472	561,162
Total Real Estate	$ 1,854,951	$ 2,240,680

Real Estate Properties Sold (De

Real Estate Properties Sold (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)aft²bldg	Dec. 31, 2014USD ($)aft²bldg	Dec. 31, 2013USD ($)	Jan. 01, 2014aft²bldg
Disposition Disclosures [Line Items]
Gross Proceeds | $	$ 530,440	$ 559,322	$ 526,949
Gain on property dispositions | $	100,314	45,147	0
Discontinued operations, net gain on property dispositions | $	$ 0	$ 46,631	95,384
Land and Land Improvements [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)	758	502
Land and Land Improvements [Member] | Carolinas [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)		104
Land and Land Improvements [Member] | Chicago Milwaukee [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)		16
Land and Land Improvements [Member] | Houston [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)	139	110
Land and Land Improvements [Member] | Lehigh Central PA [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)	281	85
Land and Land Improvements [Member] | Minnesota [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)	188	24
Land and Land Improvements [Member] | Richmond Hampton Roads [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)	94
Land and Land Improvements [Member] | South Florida [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)		69
Land and Land Improvements [Member] | Other Segments [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)	56	94
2015 sales [Member] | Richmond Hampton Roads Sale [Member] | Immediate Family Member of Management or Principal Owner [Member] | Land and Land Improvements [Member] | Richmond Hampton Roads [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)	3
2015 sales [Member] | Richmond Hampton Roads Sale [Member] | Immediate Family Member of Management or Principal Owner [Member] | Land, Buildings and Improvements [Member] | Richmond Hampton Roads [Member]
Disposition Disclosures [Line Items]
Gross Proceeds | $	$ 110,300
2015 sales [Member] | Richmond Hampton Roads Sale [Member] | Immediate Family Member of Management or Principal Owner [Member] | Building and Building Improvements [Member] | Richmond Hampton Roads [Member]
Disposition Disclosures [Line Items]
Number of buildings | bldg	22
2014 Sales [Member] | Land and Land Improvements [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)		70
2014 Sales [Member] | Building and Building Improvements [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Number of buildings | bldg		65
Leaseable square feet (unaudited) | ft²		4,740,329
Gross Proceeds | $		$ 558,578
Discontinued operations and disposal sale, not discontinued operations [Member] | 2014 Sales [Member] | New Jersey [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Number of buildings | bldg		27
Leaseable square feet (unaudited) | ft²		1,790,893
Gross Proceeds | $		$ 164,767
Discontinued operations and disposal sale, not discontinued operations [Member] | 2014 Sales [Member] | Building and Building Improvements [Member] | Southeastern PA [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Number of buildings | bldg		3
Leaseable square feet (unaudited) | ft²		113,833
Gross Proceeds | $		$ 12,225
Not Discontinued Operations [Member] | Minnesota [Member]
Disposition Disclosures [Line Items]
Number of buildings | bldg	1
Leaseable square feet (unaudited) | ft²	92,000
Not Discontinued Operations [Member] | Land and Land Improvements [Member] | Maryland [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)				19
Not Discontinued Operations [Member] | 2015 sales [Member] | Land and Land Improvements [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)	23
Not Discontinued Operations [Member] | 2015 sales [Member] | Land and Land Improvements [Member] | Minnesota [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)	0
Not Discontinued Operations [Member] | 2015 sales [Member] | Land and Land Improvements [Member] | Orlando [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)	0
Not Discontinued Operations [Member] | 2015 sales [Member] | Land and Land Improvements [Member] | Richmond Hampton Roads [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)	3
Not Discontinued Operations [Member] | 2015 sales [Member] | Land and Land Improvements [Member] | South Florida [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)	0
Not Discontinued Operations [Member] | 2015 sales [Member] | Land and Land Improvements [Member] | Southeastern PA [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)	20
Not Discontinued Operations [Member] | 2015 sales [Member] | Land and Land Improvements [Member] | Southeastern PA [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)	20
Not Discontinued Operations [Member] | 2015 sales [Member] | Land and Land Improvements [Member] | Tampa [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)	0
Not Discontinued Operations [Member] | 2015 sales [Member] | Land and Land Improvements [Member] | Other Segments [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)	0
Not Discontinued Operations [Member] | 2015 sales [Member] | Land, Buildings and Improvements [Member] | Southeastern PA [Member]
Disposition Disclosures [Line Items]
Deferred Gain on Sale of Property | $	$ 14,300
Not Discontinued Operations [Member] | 2015 sales [Member] | Building and Building Improvements [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Number of buildings | bldg	81
Leaseable square feet (unaudited) | ft²	5,710,173
Gross Proceeds | $	$ 545,133
Not Discontinued Operations [Member] | 2015 sales [Member] | Building and Building Improvements [Member] | Minnesota [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Number of buildings | bldg	2
Leaseable square feet (unaudited) | ft²	222,642
Gross Proceeds | $	$ 25,700
Not Discontinued Operations [Member] | 2015 sales [Member] | Building and Building Improvements [Member] | Orlando [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Number of buildings | bldg	1
Leaseable square feet (unaudited) | ft²	713,585
Gross Proceeds | $	$ 35,500
Not Discontinued Operations [Member] | 2015 sales [Member] | Building and Building Improvements [Member] | Richmond Hampton Roads [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Number of buildings | bldg	22
Leaseable square feet (unaudited) | ft²	1,319,299
Gross Proceeds | $	$ 110,054
Not Discontinued Operations [Member] | 2015 sales [Member] | Building and Building Improvements [Member] | South Florida [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Number of buildings | bldg	1
Leaseable square feet (unaudited) | ft²	99,740
Gross Proceeds | $	$ 14,700
Not Discontinued Operations [Member] | 2015 sales [Member] | Building and Building Improvements [Member] | Southeastern PA [Member]
Disposition Disclosures [Line Items]
Number of buildings | bldg	41
Not Discontinued Operations [Member] | 2015 sales [Member] | Building and Building Improvements [Member] | Southeastern PA [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Number of buildings | bldg	46
Leaseable square feet (unaudited) | ft²	2,724,489
Gross Proceeds | $	$ 316,583
Not Discontinued Operations [Member] | 2015 sales [Member] | Building and Building Improvements [Member] | Tampa [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Number of buildings | bldg	2
Leaseable square feet (unaudited) | ft²	60,800
Gross Proceeds | $	$ 5,225
Not Discontinued Operations [Member] | 2015 sales [Member] | Building and Building Improvements [Member] | Other Segments [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Number of buildings | bldg	7
Leaseable square feet (unaudited) | ft²	569,618
Gross Proceeds | $	$ 37,371
Not Discontinued Operations [Member] | 2014 Sales [Member] | Houston [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Number of buildings | bldg		5
Acres of developable land (unaudited)		0
Leaseable square feet (unaudited) | ft²		553,510
Gross Proceeds | $		$ 29,721
Not Discontinued Operations [Member] | 2014 Sales [Member] | Maryland [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)		19
Not Discontinued Operations [Member] | 2014 Sales [Member] | New Jersey [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)		51
Not Discontinued Operations [Member] | 2014 Sales [Member] | Land and Land Improvements [Member] | Minnesota [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)		0
Not Discontinued Operations [Member] | 2014 Sales [Member] | Land and Land Improvements [Member] | Orlando [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)		0
Not Discontinued Operations [Member] | 2014 Sales [Member] | Land and Land Improvements [Member] | Southeastern PA [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)		0
Not Discontinued Operations [Member] | 2014 Sales [Member] | Land and Land Improvements [Member] | Other Segments [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Acres of developable land (unaudited)		0
Not Discontinued Operations [Member] | 2014 Sales [Member] | Building and Building Improvements [Member] | Minnesota [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Number of buildings | bldg		1
Leaseable square feet (unaudited) | ft²		191,336
Gross Proceeds | $		$ 41,000
Not Discontinued Operations [Member] | 2014 Sales [Member] | Building and Building Improvements [Member] | Orlando [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Number of buildings | bldg		4
Leaseable square feet (unaudited) | ft²		588,678
Gross Proceeds | $		$ 116,750
Not Discontinued Operations [Member] | 2014 Sales [Member] | Building and Building Improvements [Member] | Other Segments [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Number of buildings | bldg		2
Leaseable square feet (unaudited) | ft²		134,510
Gross Proceeds | $		$ 8,655
Not Discontinued Operations [Member] | Gain (loss) on property dispositions [Member] | 2015 sales [Member]
Disposition Disclosures [Line Items]
Gain on property dispositions | $	100,300
Not Discontinued Operations [Member] | Gain (loss) on property dispositions [Member] | 2014 Sales [Member]
Disposition Disclosures [Line Items]
Gain on property dispositions | $		45,100
Discontinued Operations [Member]
Disposition Disclosures [Line Items]
Discontinued operations, net gain on property dispositions | $	$ 0	$ 46,631	95,384
Discontinued Operations [Member] | Building and Building Improvements [Member] | Maryland [Member]
Disposition Disclosures [Line Items]
Leaseable square feet (unaudited) | ft²				1,400,000
Discontinued Operations [Member] | Building and Building Improvements [Member] | New Jersey [Member]
Disposition Disclosures [Line Items]
Number of buildings | bldg				24
Discontinued Operations [Member] | Building and Building Improvements [Member] | Southeastern PA [Member]
Disposition Disclosures [Line Items]
Leaseable square feet (unaudited) | ft²				37,000
Discontinued Operations [Member] | 2014 Sales [Member] | Maryland [Member] | Operating Segments [Member]
Disposition Disclosures [Line Items]
Number of buildings | bldg		23
Leaseable square feet (unaudited) | ft²		1,367,569
Gross Proceeds | $		$ 185,460
Discontinued Operations [Member] | Discontinued Operations [Member] | 2014 Sales [Member]
Disposition Disclosures [Line Items]
Discontinued operations, net gain on property dispositions | $		$ 46,600
Discontinued Operations [Member] | Discontinued Operations [Member] | 2013 sales [Member]
Disposition Disclosures [Line Items]
Discontinued operations, net gain on property dispositions | $			$ 96,300

Real Estate Real Estate Propert

Real Estate Real Estate Properties Acquired (Details) - Operating Segments [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)aft²bldg	Dec. 31, 2014USD ($)aft²bldg
Land and Land Improvements [Member]
Business Acquisition [Line Items]
Acres of developable land (unaudited) | a	758	502
Land and Land Improvements [Member] | Carolinas [Member]
Business Acquisition [Line Items]
Acres of developable land (unaudited) | a		104
Land and Land Improvements [Member] | Chicago Milwaukee [Member]
Business Acquisition [Line Items]
Acres of developable land (unaudited) | a		16
Land and Land Improvements [Member] | Houston [Member]
Business Acquisition [Line Items]
Acres of developable land (unaudited) | a	139	110
Land and Land Improvements [Member] | Lehigh Central PA [Member]
Business Acquisition [Line Items]
Acres of developable land (unaudited) | a	281	85
Land and Land Improvements [Member] | Minnesota [Member]
Business Acquisition [Line Items]
Acres of developable land (unaudited) | a	188	24
Land and Land Improvements [Member] | Richmond Hampton Roads [Member]
Business Acquisition [Line Items]
Acres of developable land (unaudited) | a	94
Land and Land Improvements [Member] | South Florida [Member]
Business Acquisition [Line Items]
Acres of developable land (unaudited) | a		69
Land and Land Improvements [Member] | Other Segments [Member]
Business Acquisition [Line Items]
Acres of developable land (unaudited) | a	56	94
2015 acquisitions [Member] | Land and Land Improvements [Member] | Lehigh Central PA [Member]
Business Acquisition [Line Items]
Purchase price | $	$ 62,402
2015 acquisitions [Member] | Land and Land Improvements [Member] | Richmond Hampton Roads [Member]
Business Acquisition [Line Items]
Purchase price | $	$ 1,727
2015 acquisitions [Member] | Building and Building Improvements [Member]
Business Acquisition [Line Items]
Number of buildings | bldg	5
Leaseable square feet (unaudited) | ft²	1,529,211
2015 acquisitions [Member] | Building and Building Improvements [Member] | Houston [Member]
Business Acquisition [Line Items]
Number of buildings | bldg	3
Leaseable square feet (unaudited) | ft²	921,196
2015 acquisitions [Member] | Building and Building Improvements [Member] | Lehigh Central PA [Member]
Business Acquisition [Line Items]
Number of buildings | bldg	0
Leaseable square feet (unaudited) | ft²	0
2015 acquisitions [Member] | Building and Building Improvements [Member] | Minnesota [Member]
Business Acquisition [Line Items]
Number of buildings | bldg	1
Leaseable square feet (unaudited) | ft²	197,956
2015 acquisitions [Member] | Building and Building Improvements [Member] | Richmond Hampton Roads [Member]
Business Acquisition [Line Items]
Number of buildings | bldg	0
Leaseable square feet (unaudited) | ft²	0
2015 acquisitions [Member] | Building and Building Improvements [Member] | Other Segments [Member]
Business Acquisition [Line Items]
Number of buildings | bldg	1
Leaseable square feet (unaudited) | ft²	410,059
2015 acquisitions [Member] | Land, Buildings and Improvements [Member]
Business Acquisition [Line Items]
Purchase price | $	$ 220,415
2015 acquisitions [Member] | Land, Buildings and Improvements [Member] | Houston [Member]
Business Acquisition [Line Items]
Purchase price | $	86,497
2015 acquisitions [Member] | Land, Buildings and Improvements [Member] | Minnesota [Member]
Business Acquisition [Line Items]
Purchase price | $	24,541
2015 acquisitions [Member] | Land, Buildings and Improvements [Member] | Other Segments [Member]
Business Acquisition [Line Items]
Purchase price | $	$ 45,248
2014 acquisitions [Member] | Building and Building Improvements [Member]
Business Acquisition [Line Items]
Number of buildings | bldg		10
Leaseable square feet (unaudited) | ft²		1,928,608
2014 acquisitions [Member] | Building and Building Improvements [Member] | Carolinas [Member]
Business Acquisition [Line Items]
Number of buildings | bldg		7
Leaseable square feet (unaudited) | ft²		947,365
2014 acquisitions [Member] | Building and Building Improvements [Member] | Chicago Milwaukee [Member]
Business Acquisition [Line Items]
Number of buildings | bldg		0
Leaseable square feet (unaudited) | ft²		0
2014 acquisitions [Member] | Building and Building Improvements [Member] | Houston [Member]
Business Acquisition [Line Items]
Number of buildings | bldg		0
Leaseable square feet (unaudited) | ft²		0
2014 acquisitions [Member] | Building and Building Improvements [Member] | Lehigh Central PA [Member]
Business Acquisition [Line Items]
Number of buildings | bldg		0
Leaseable square feet (unaudited) | ft²		0
2014 acquisitions [Member] | Building and Building Improvements [Member] | Minnesota [Member]
Business Acquisition [Line Items]
Number of buildings | bldg		0
Leaseable square feet (unaudited) | ft²		0
2014 acquisitions [Member] | Building and Building Improvements [Member] | South Florida [Member]
Business Acquisition [Line Items]
Number of buildings | bldg		0
Leaseable square feet (unaudited) | ft²		0
2014 acquisitions [Member] | Building and Building Improvements [Member] | Other Segments [Member]
Business Acquisition [Line Items]
Number of buildings | bldg		3
Leaseable square feet (unaudited) | ft²		981,243
2014 acquisitions [Member] | Land, Buildings and Improvements [Member]
Business Acquisition [Line Items]
Purchase price | $		$ 212,193
2014 acquisitions [Member] | Land, Buildings and Improvements [Member] | Carolinas [Member]
Business Acquisition [Line Items]
Purchase price | $		61,293
2014 acquisitions [Member] | Land, Buildings and Improvements [Member] | Chicago Milwaukee [Member]
Business Acquisition [Line Items]
Purchase price | $		7,914
2014 acquisitions [Member] | Land, Buildings and Improvements [Member] | Houston [Member]
Business Acquisition [Line Items]
Purchase price | $		26,210
2014 acquisitions [Member] | Land, Buildings and Improvements [Member] | Lehigh Central PA [Member]
Business Acquisition [Line Items]
Purchase price | $		15,307
2014 acquisitions [Member] | Land, Buildings and Improvements [Member] | Minnesota [Member]
Business Acquisition [Line Items]
Purchase price | $		2,966
2014 acquisitions [Member] | Land, Buildings and Improvements [Member] | South Florida [Member]
Business Acquisition [Line Items]
Purchase price | $		12,027
2014 acquisitions [Member] | Land, Buildings and Improvements [Member] | Other Segments [Member]
Business Acquisition [Line Items]
Purchase price | $		$ 86,476

Investments in Unconsolidated78

Investments in Unconsolidated Joint Ventures (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Equity Method Investment, Summarized Financial Information, Assets [Abstract]
Real estate assets		$ 1,694,165		$ 1,775,173
Accumulated depreciation		(285,535)		(249,661)
Real estate assets, net		1,408,630		1,525,512
Development in Process		398,892		133,583
Land held for development		77,556		83,908
Other assets		209,271		193,204
Total assets		2,094,349		1,936,207
Equity Method Investment, Summarized Financial Information, Liabilities and Equity [Abstract]
Debt		1,061,218		995,271
Other liabilities		136,847		162,914
Equity		896,284		778,022
Total liabilities and equity		2,094,349		1,936,207
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Equity in earnings of unconsolidated joint ventures		3,149		10,314		$ 6,067
Company's net investment in unconsolidated joint ventures		218,454		208,832	[1]
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity		4,500		(3,200)
Cambridge Medipark Ltd [Member] | Leaseholds and Leasehold Improvements [Member]
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Gain (loss) on sale/impairment		9,900		9,100
Liberty Venture I, LP [Member]
Equity Method Investment, Summarized Financial Information, Assets [Abstract]
Real estate assets		168,690		173,346
Accumulated depreciation		(37,473)		(32,752)
Real estate assets, net		131,217		140,594
Development in Process		34,878		0
Land held for development		4,471		14,108
Other assets		14,860		15,523
Total assets		185,426		170,225
Equity Method Investment, Summarized Financial Information, Liabilities and Equity [Abstract]
Debt		121,793		78,748
Other liabilities		10,571		5,215
Equity		53,062		86,262
Total liabilities and equity		185,426		170,225
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Total revenue		23,708		19,277		16,238
Operating expense		7,977		6,398		5,248
Operating income (loss)		15,731		12,879		10,990
Interest		(5,415)		(5,078)		(5,318)
Depreciation and amortization		(6,399)		(5,757)		(4,414)
Other income/(expense)		68		(17)		53
Gain (loss) on sale/impairment		760		0		0
Net income (loss)		4,745		2,027		1,311
Equity in earnings of unconsolidated joint ventures		1,540		788		530
Company's net investment in unconsolidated joint ventures		11,563		20,010	[1]
Kings Hill Unit Trust [Member]
Equity Method Investment, Summarized Financial Information, Assets [Abstract]
Real estate assets		164,603		173,707
Accumulated depreciation		(28,513)		(26,494)
Real estate assets, net		136,090		147,213
Development in Process		0		0
Land held for development		0		0
Other assets		8,967		14,928
Total assets		145,057		162,141
Equity Method Investment, Summarized Financial Information, Liabilities and Equity [Abstract]
Debt		99,603		91,356
Other liabilities		27,408		94,504
Equity		18,046		(23,719)
Total liabilities and equity		145,057		162,141
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Total revenue		12,602		13,221		12,701
Operating expense		5,261		5,387		4,187
Operating income (loss)		7,341		7,834		8,514
Interest		(6,116)		(6,110)		(5,133)
Depreciation and amortization		(3,954)		(4,135)		(3,829)
Other income/(expense)		45,604		208		71
Gain (loss) on sale/impairment		0		0		(5,647)
Net income (loss)		42,875		(2,203)		(6,024)
Equity in earnings of unconsolidated joint ventures		(425)		(288)		(908)
Company's net investment in unconsolidated joint ventures		6,789		11,663	[1]
Liberty Illinois, LP [Member]
Equity Method Investment, Summarized Financial Information, Assets [Abstract]
Real estate assets		263,552		260,988
Accumulated depreciation		(54,308)		(48,191)
Real estate assets, net		209,244		212,797
Development in Process		22,998		17,973
Land held for development		28,590		28,362
Other assets		20,668		20,182
Total assets		281,500		279,314
Equity Method Investment, Summarized Financial Information, Liabilities and Equity [Abstract]
Debt		155,601		145,752
Other liabilities		8,594		13,812
Equity		117,305		119,750
Total liabilities and equity		281,500		279,314
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Total revenue		26,085		25,181		24,455
Operating expense		9,303		8,965		8,353
Operating income (loss)		16,782		16,216		16,102
Interest		(8,441)		(7,932)		(8,348)
Depreciation and amortization		(7,406)		(7,380)		(7,382)
Other income/(expense)		29		39		38
Gain (loss) on sale/impairment		0		187		0
Net income (loss)		964		1,130		410
Equity in earnings of unconsolidated joint ventures		807		824		618
Company's net investment in unconsolidated joint ventures		18,221		18,692	[1]
Liberty Washington, LP [Member]
Equity Method Investment, Summarized Financial Information, Assets [Abstract]
Real estate assets		534,132		603,413
Accumulated depreciation		(43,224)		(35,384)
Real estate assets, net		490,908		568,029
Development in Process		0		0
Land held for development		2,000		2,000
Other assets		52,429		50,657
Total assets		545,337		620,686
Equity Method Investment, Summarized Financial Information, Liabilities and Equity [Abstract]
Debt		314,080		318,367
Other liabilities		10,634		12,022
Equity		220,623		290,297
Total liabilities and equity		545,337		620,686
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Total revenue		71,101		72,824		75,821
Operating expense		27,384		28,349		27,549
Operating income (loss)		43,717		44,475		48,272
Interest		(17,353)		(18,612)		(18,946)
Depreciation and amortization		(20,725)		(27,112)		(28,392)
Other income/(expense)		531		375		122
Gain (loss) on sale/impairment		(56,792)		(172,691)		(8,731)
Net income (loss)		(50,622)		(173,565)		(7,675)
Equity in earnings of unconsolidated joint ventures		(7,314)		2,251		3,748
Company's net investment in unconsolidated joint ventures		55,552		69,230	[1]
Liberty Comcast 1701 JFK Boulevard, LP [Member]
Equity Method Investment, Summarized Financial Information, Assets [Abstract]
Real estate assets		495,248		494,678
Accumulated depreciation		(111,067)		(97,189)
Real estate assets, net		384,181		397,489
Development in Process		0		0
Land held for development		0		0
Other assets		47,441		52,393
Total assets		431,622		449,882
Equity Method Investment, Summarized Financial Information, Liabilities and Equity [Abstract]
Debt		313,402		317,934
Other liabilities		9,618		9,657
Equity		108,602		122,291
Total liabilities and equity		431,622		449,882
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Total revenue		68,444		63,580		62,411
Operating expense		29,692		23,557		23,074
Operating income (loss)		38,752		40,023		39,337
Interest		(19,936)		(20,179)		(20,391)
Depreciation and amortization		(14,442)		(14,591)		(14,734)
Other income/(expense)		(227)		(278)		(233)
Gain (loss) on sale/impairment		0		0		0
Net income (loss)		4,147		4,975		3,979
Equity in earnings of unconsolidated joint ventures		2,053		1,633		1,406
Company's net investment in unconsolidated joint ventures		20,465		23,153	[1],[2]
Liberty Property 18th & Arch [Member]
Equity Method Investment, Summarized Financial Information, Assets [Abstract]
Real estate assets		0	[3]	0	[4]
Accumulated depreciation		0	[3]	0	[4]
Real estate assets, net		0	[3]	0	[4]
Development in Process		323,615	[3]	111,244	[4]
Land held for development		0	[3]	0	[4]
Other assets		15,594	[3]	1,306	[4]
Total assets		339,209	[3]	112,550	[4]
Equity Method Investment, Summarized Financial Information, Liabilities and Equity [Abstract]
Debt		0		0	[4]
Other liabilities		40,958		13,398	[4]
Equity		298,251	[3]	99,152	[4]
Total liabilities and equity		339,209	[3]	112,550	[4]
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Total revenue	[4]	0		0
Operating expense	[4]	221		199
Operating income (loss)	[4]	(221)		(199)
Interest	[4]	0		0
Depreciation and amortization	[4]	0		0
Other income/(expense)	[4]	30		(13)
Gain (loss) on sale/impairment	[4]	0		0
Net income (loss)	[4]	(191)		(212)
Equity in earnings of unconsolidated joint ventures	[4]	(29)		(33)
Company's net investment in unconsolidated joint ventures		62,677		21,292	[1],[4]
Other Joint Ventures [Member]
Equity Method Investment, Summarized Financial Information, Assets [Abstract]
Real estate assets		67,940		69,041
Accumulated depreciation		(10,950)		(9,651)
Real estate assets, net		56,990		59,390
Development in Process		17,401		4,366
Land held for development		42,495		39,438
Other assets		49,312		38,215
Total assets		166,198		141,409
Equity Method Investment, Summarized Financial Information, Liabilities and Equity [Abstract]
Debt		56,739		43,114
Other liabilities		29,064		14,306
Equity		80,395		83,989
Total liabilities and equity		166,198		141,409
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Total revenue		9,387	[5]	8,923	[5]	8,415
Operating expense		2,727	[5]	2,897	[5]	2,636
Operating income (loss)		6,660	[5]	6,026	[5]	5,779
Interest		(2,248)	[5]	(3,415)	[5]	(2,933)
Depreciation and amortization		(1,840)	[5]	(1,891)	[5]	(1,870)
Other income/(expense)		9,925	[5]	9,090	[5]	(37)
Gain (loss) on sale/impairment		0	[5]	0	[5]	0
Net income (loss)		12,497	[5]	9,810	[5]	939
Equity in earnings of unconsolidated joint ventures		6,517	[5]	5,139	[5]	673
Company's net investment in unconsolidated joint ventures		43,187		44,792	[1]
Equity Method Investee [Member]
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Total revenue		211,327		203,006		200,041
Operating expense		82,565		75,752		71,047
Operating income (loss)		128,762		127,254		128,994
Interest		(59,509)		(61,326)		(61,069)
Depreciation and amortization		(54,766)		(60,866)		(60,621)
Other income/(expense)		55,960		9,404		14
Gain (loss) on sale/impairment		(56,032)		(172,504)		(14,378)
Net income (loss)		14,415		(158,038)		(7,060)
Equity in earnings of unconsolidated joint ventures		$ 3,149		$ 10,314		$ 6,067
[1]	Differences between the Company's net investment in unconsolidated joint ventures and its underlying equity in the net assets of the venture are primarily a result of impairments related to the Company's investment in unconsolidated joint ventures, the deferral of gains associated with the sales of properties to joint ventures in which the Company retains an ownership interest and loans made to the joint ventures by the Company. These adjustments have resulted in an aggregate difference reducing the Company's investments in unconsolidated joint ventures by $4.5 million as of December 31, 2015 and increasing the Company's investment in unconsolidated joint ventures by $3.2 million as of December 31, 2014. Differences between historical cost basis and the basis reflected at the joint venture level (other than loans) are typically depreciated over the life of the related asset.
[2]	The Company's maximum exposure to loss is equal to the Company's net investment in unconsolidated joint ventures as of December 31, 2015 and 2014, respectively.
[3]	Other income/(expense) for this joint venture reflects forgiveness of related party debt between the joint venture and its investment partners consistent with each partner's equity ownership.
[4]	Represents the combined results of two joint ventures related to the property at 18th and Arch Streets, Philadelphia.
[5]	Other income/(expense) for this group of joint ventures reflects gains related to the sales of land leasehold interests totaling $9.9 million and $9.1 million for the years ended December 31, 2015 and 2014, respectively.

Investments in Unconsolidated79

Investments in Unconsolidated Joint Ventures - Narrative (Details)		3 Months Ended	12 Months Ended
		Dec. 31, 2015USD ($)aft²bldgroomstory	Dec. 31, 2015USD ($)aft²bldgroomstory	Dec. 31, 2014USD ($)		Dec. 31, 2013USD ($)	Jun. 30, 2014investment	Jan. 01, 2013
Schedule of Equity Method Investments [Line Items]
Gain (Loss) on Sale of Properties			$ 100,314,000	$ 91,778,000		$ 98,651,000
Gross Proceeds			530,440,000	559,322,000		526,949,000
Company's net investment in unconsolidated joint ventures		$ 218,454,000	218,454,000	208,832,000
Impairment - real estate assets			18,244,000	117,000		248,000
Development in progress		360,948,000	360,948,000	277,411,000
Company's net investment in unconsolidated joint ventures		218,454,000	218,454,000	208,832,000	[1]
Liberty Venture I, LP [Member]
Schedule of Equity Method Investments [Line Items]
Company's net investment in unconsolidated joint ventures		$ 11,563,000	$ 11,563,000	20,010,000	[1]
Liberty Venture I, LP [Member] | New Jersey [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Percentage		25.00%	25.00%
Leaseable square feet (unaudited) | ft²		3,700,000	3,700,000
Liberty Venture I, LP [Member] | New Jersey [Member] | Land and Land Improvements [Member]
Schedule of Equity Method Investments [Line Items]
Acres of developable land (unaudited) | a		36	36
Liberty Venture I, LP [Member] | New Jersey [Member] | Building and Building Improvements [Member]
Schedule of Equity Method Investments [Line Items]
Leaseable square feet (unaudited) | a		198,000	198,000
Gross Proceeds			$ 8,500,000
Liberty Venture I, LP [Member] | New Jersey [Member] | Building and Building Improvements [Member] | Not Discontinued Operations [Member] | Joint venture sales, 2015 [Member]
Schedule of Equity Method Investments [Line Items]
Number of buildings | bldg		1	1
Liberty Venture I, LP [Member] | New Jersey [Member] | Building and Building Improvements [Member] | Industrial Property [Member]
Schedule of Equity Method Investments [Line Items]
Number of buildings | bldg		26	26
Liberty Venture I, LP [Member] | New Jersey [Member] | Construction in Progress [Member]
Schedule of Equity Method Investments [Line Items]
Number of buildings | bldg		2	2
Leaseable square feet (unaudited) | ft²		825,000	825,000
Anticipated aggregate investment		$ 54,200,000	$ 54,200,000
Kings Hill Unit Trust [Member]
Schedule of Equity Method Investments [Line Items]
Company's net investment in unconsolidated joint ventures		$ 6,789,000	$ 6,789,000	11,663,000	[1]
Kings Hill Unit Trust [Member] | United Kingdom [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Percentage		20.00%	20.00%
Kings Hill Unit Trust [Member] | United Kingdom [Member] | Building and Building Improvements [Member]
Schedule of Equity Method Investments [Line Items]
Leaseable square feet (unaudited) | ft²		490,000	490,000
Kings Hill Unit Trust [Member] | United Kingdom [Member] | Building and Building Improvements [Member] | Industrial Property [Member]
Schedule of Equity Method Investments [Line Items]
Number of buildings | bldg		3	3
Kings Hill Unit Trust [Member] | United Kingdom [Member] | Building and Building Improvements [Member] | Office Building [Member]
Schedule of Equity Method Investments [Line Items]
Number of buildings | bldg		11	11
Liberty Illinois, LP [Member]
Schedule of Equity Method Investments [Line Items]
Company's net investment in unconsolidated joint ventures		$ 18,221,000	$ 18,221,000	18,692,000	[1]
Liberty Illinois, LP [Member] | Chicago Milwaukee [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Percentage		25.00%	25.00%
Liberty Illinois, LP [Member] | Chicago Milwaukee [Member] | Land and Land Improvements [Member]
Schedule of Equity Method Investments [Line Items]
Acres of developable land (unaudited) | a		248	248
Liberty Illinois, LP [Member] | Chicago Milwaukee [Member] | Building and Building Improvements [Member]
Schedule of Equity Method Investments [Line Items]
Leaseable square feet (unaudited) | ft²		5,100,000	5,100,000
Liberty Illinois, LP [Member] | Chicago Milwaukee [Member] | Building and Building Improvements [Member] | Industrial Property [Member]
Schedule of Equity Method Investments [Line Items]
Number of buildings | bldg		15	15
Liberty Illinois, LP [Member] | Chicago Milwaukee [Member] | Construction in Progress [Member]
Schedule of Equity Method Investments [Line Items]
Number of buildings | bldg		1	1
Leaseable square feet (unaudited) | ft²		430,000	430,000
Anticipated aggregate investment		$ 24,600,000	$ 24,600,000
Blythe Valley JV Sarl [Member] | United Kingdom [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Percentage								20.00%
Company's net investment in unconsolidated joint ventures						$ 0
Liberty Washington, LP [Member]
Schedule of Equity Method Investments [Line Items]
Company's net investment in unconsolidated joint ventures		$ 55,552,000	$ 55,552,000	69,230,000	[1]
Liberty Washington, LP [Member] | Northern Virginia and Washington DC [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Percentage		25.00%	25.00%
Impairment - real estate assets				172,700,000
Liberty Washington, LP [Member] | Northern Virginia and Washington DC [Member] | Land and Land Improvements [Member]
Schedule of Equity Method Investments [Line Items]
Acres of developable land (unaudited) | a		6	6
Liberty Washington, LP [Member] | Northern Virginia and Washington DC [Member] | Building and Building Improvements [Member]
Schedule of Equity Method Investments [Line Items]
Leaseable square feet (unaudited) | ft²		2,300,000	2,300,000
Liberty Washington, LP [Member] | Northern Virginia and Washington DC [Member] | Building and Building Improvements [Member] | Office Building [Member]
Schedule of Equity Method Investments [Line Items]
Number of buildings | bldg		20	20
Liberty Washington, LP [Member] | Northern Virginia [Member]
Schedule of Equity Method Investments [Line Items]
Impairment - real estate assets			$ 56,800,000
Liberty Washington, LP [Member] | Northern Virginia [Member] | Mortgages [Member]
Schedule of Equity Method Investments [Line Items]
Debt Instrument, Debt Default, Amount		$ 46,400,000	$ 46,400,000
Liberty Washington, LP [Member] | Northern Virginia [Member] | Building and Building Improvements [Member] | Not Discontinued Operations [Member] | Joint venture sales, 2015 [Member]
Schedule of Equity Method Investments [Line Items]
Number of buildings | bldg		1	1
Leaseable square feet (unaudited) | a		80,000	80,000
Gross Proceeds		$ 5,000,000
Liberty Comcast 1701 JFK Boulevard, LP [Member]
Schedule of Equity Method Investments [Line Items]
Company's net investment in unconsolidated joint ventures		$ 20,465,000	$ 20,465,000	23,153,000	[1],[2]
Liberty Comcast 1701 JFK Boulevard, LP [Member] | Philadelphia [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Percentage		20.00%	20.00%
Liberty Comcast 1701 JFK Boulevard, LP [Member] | Philadelphia [Member] | Investments in and advances to unconsolidated joint ventures [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Schedule of Equity Method Investments [Line Items]
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount		$ 20,500,000	$ 20,500,000	23,200,000
Liberty Comcast 1701 JFK Boulevard, LP [Member] | Philadelphia [Member] | Building and Building Improvements [Member]
Schedule of Equity Method Investments [Line Items]
Number of buildings | bldg		1	1
Leaseable square feet (unaudited) | ft²		1,250,000	1,250,000
Liberty Property 18th & Arch [Member]
Schedule of Equity Method Investments [Line Items]
Company's net investment in unconsolidated joint ventures	[1],[3]	$ 62,700,000	$ 62,700,000
Company's net investment in unconsolidated joint ventures		$ 62,677,000	$ 62,677,000	$ 21,292,000	[1],[4]
Liberty Property 18th & Arch [Member] | Philadelphia [Member]
Schedule of Equity Method Investments [Line Items]
Number of equity method investments | investment							2
Ownership Percentage		20.00%	20.00%
Anticipated investment in joint ventures		$ 186,000,000	$ 186,000,000
Development in progress		$ 323,600,000	$ 323,600,000
Liberty Property 18th & Arch [Member] | Philadelphia [Member] | Construction in Progress [Member]
Schedule of Equity Method Investments [Line Items]
Leaseable square feet (unaudited) | ft²		1,300,000	1,300,000
Anticipated aggregate investment		$ 932,000,000	$ 932,000,000
Number of stories in a high-rise building | story		59	59
Number of hotel rooms | room		222	222
Liberty AIPO, LP [Member] | Orlando [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Percentage		50.00%	50.00%
Liberty AIPO, LP [Member] | Orlando [Member] | Building and Building Improvements [Member] | Industrial Property [Member]
Schedule of Equity Method Investments [Line Items]
Number of buildings | bldg		4	4
Liberty AIPO, LP [Member] | Orlando [Member] | Construction in Progress [Member]
Schedule of Equity Method Investments [Line Items]
Number of buildings | bldg		2	2
Leaseable square feet (unaudited) | ft²		369,000	369,000
Anticipated aggregate investment		$ 20,300,000	$ 20,300,000
Silversword Properties Ltd [Member] | United Kingdom [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Percentage		50.00%	50.00%
Silversword Properties Ltd [Member] | United Kingdom [Member] | Building and Building Improvements [Member]
Schedule of Equity Method Investments [Line Items]
Number of buildings | bldg		1	1
Cambridge Medipark Ltd [Member] | United Kingdom [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Percentage		50.00%	50.00%
Cambridge Medipark Ltd [Member] | United Kingdom [Member] | Building and Building Improvements [Member]
Schedule of Equity Method Investments [Line Items]
Number of buildings | bldg		0	0
Liberty Property 19th & Arch LP [Member] | Philadelphia [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Percentage		50.00%	50.00%
Liberty Property 19th & Arch LP [Member] | Philadelphia [Member] | Land and Land Improvements [Member]
Schedule of Equity Method Investments [Line Items]
Acres of developable land (unaudited) | a		1	1
[1]	Differences between the Company's net investment in unconsolidated joint ventures and its underlying equity in the net assets of the venture are primarily a result of impairments related to the Company's investment in unconsolidated joint ventures, the deferral of gains associated with the sales of properties to joint ventures in which the Company retains an ownership interest and loans made to the joint ventures by the Company. These adjustments have resulted in an aggregate difference reducing the Company's investments in unconsolidated joint ventures by $4.5 million as of December 31, 2015 and increasing the Company's investment in unconsolidated joint ventures by $3.2 million as of December 31, 2014. Differences between historical cost basis and the basis reflected at the joint venture level (other than loans) are typically depreciated over the life of the related asset.
[2]	The Company's maximum exposure to loss is equal to the Company's net investment in unconsolidated joint ventures as of December 31, 2015 and 2014, respectively.
[3]	Other income/(expense) for this joint venture reflects forgiveness of related party debt between the joint venture and its investment partners consistent with each partner's equity ownership.
[4]	Represents the combined results of two joint ventures related to the property at 18th and Arch Streets, Philadelphia.

Investments in Unconsolidated80

Investments in Unconsolidated Joint Ventures - Related Party (Details)	12 Months Ended
	Dec. 31, 2015USD ($)aft²	Dec. 31, 2014USD ($)aft²bldg	Dec. 31, 2013USD ($)
Related Party Transaction [Line Items]
Impairment - real estate assets	$ 18,244,000	$ 117,000	$ 248,000
Northern Virginia and Washington DC [Member] | Liberty Washington, LP [Member]
Related Party Transaction [Line Items]
Impairment - real estate assets		172,700,000
Northern Virginia and Washington DC [Member] | Liberty Washington, LP [Member] | Building and Building Improvements [Member]
Related Party Transaction [Line Items]
Leaseable square feet (unaudited) | ft²	2,300,000
Northern Virginia and Washington DC [Member] | Liberty Washington, LP [Member] | Land and Land Improvements [Member]
Related Party Transaction [Line Items]
Acres of developable land (unaudited) | a	6
Northern Virginia [Member] | Liberty Washington, LP [Member]
Related Party Transaction [Line Items]
Impairment - real estate assets	$ 56,800,000
Northern Virginia [Member] | Liberty Washington, LP [Member] | General Partner [Member] | Investments in and advances to unconsolidated joint ventures [Member]
Related Party Transaction [Line Items]
Impairment - real estate assets	$ 11,500,000
New Jersey [Member] | Liberty Venture I, LP [Member]
Related Party Transaction [Line Items]
Leaseable square feet (unaudited) | ft²	3,700,000
New Jersey [Member] | Liberty Venture I, LP [Member] | Building and Building Improvements [Member]
Related Party Transaction [Line Items]
Leaseable square feet (unaudited) | a	198,000
New Jersey [Member] | Liberty Venture I, LP [Member] | Land and Land Improvements [Member]
Related Party Transaction [Line Items]
Acres of developable land (unaudited) | a	36
United Kingdom [Member] | Kings Hill Unit Trust [Member] | General Partner [Member] | Investments in and advances to unconsolidated joint ventures [Member]
Related Party Transaction [Line Items]
Impairment - real estate assets			800,000
United Kingdom [Member] | Kings Hill Unit Trust [Member] | Building and Building Improvements [Member]
Related Party Transaction [Line Items]
Leaseable square feet (unaudited) | ft²	490,000
Purchase from liberty property limited partnership [Member] | New Jersey [Member] | Liberty Venture I, LP [Member] | Building and Building Improvements [Member] | General Partner [Member] | 2015 acquisitions [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties		2,500,000
Related Party Transaction, Purchases from Related Party		$ 43,000,000
Number of buildings | bldg		3
Leaseable square feet (unaudited) | ft²		603,000
Purchase from liberty property limited partnership [Member] | New Jersey [Member] | Liberty Venture I, LP [Member] | Land and Land Improvements [Member] | General Partner [Member] | 2015 acquisitions [Member]
Related Party Transaction [Line Items]
Acres of developable land (unaudited) | a		51
Liberty Venture I, LP [Member] | New Jersey [Member] | Equity Method Investee [Member]
Related Party Transaction [Line Items]
Management Fees Revenue	$ 1,600,000	$ 1,400,000	578,000
Liberty Venture I, LP [Member] | New Jersey [Member] | Equity Method Investee [Member] | Prepaid Expenses and Other Current Assets [Member]
Related Party Transaction [Line Items]
Due from Related Parties	451,000
Kings Hill Unit Trust [Member] | United Kingdom [Member] | Equity Method Investee [Member]
Related Party Transaction [Line Items]
Management Fees Revenue	$ 304,000	285,000	237,000
Related Party Transaction, Rate	10.00%
Kings Hill Unit Trust [Member] | United Kingdom [Member] | Equity Method Investee [Member] | Prepaid Expenses and Other Current Assets [Member]
Related Party Transaction [Line Items]
Due from Related Parties	$ 271,000
Kings Hill Unit Trust [Member] | United Kingdom [Member] | Equity Method Investee [Member] | Accounts Receivable [Member]
Related Party Transaction [Line Items]
Due from Related Parties		267,000
Kings Hill Unit Trust [Member] | United Kingdom [Member] | Equity Method Investee [Member] | Investments in and advances to unconsolidated joint ventures [Member]
Related Party Transaction [Line Items]
Notes Receivable, Related Parties	4,700,000	18,100,000
Liberty Illinois, LP [Member] | Chicago Milwaukee [Member] | Equity Method Investee [Member]
Related Party Transaction [Line Items]
Management Fees Revenue	1,300,000	1,000,000	952,000
Blythe Valley JV Sarl [Member] | United Kingdom [Member] | Equity Method Investee [Member]
Related Party Transaction [Line Items]
Management Fees Revenue			33,000
Liberty Washington, LP [Member] | Northern Virginia and Washington DC [Member] | Equity Method Investee [Member]
Related Party Transaction [Line Items]
Management Fees Revenue	4,800,000	4,400,000	4,900,000
Liberty Washington, LP [Member] | Northern Virginia and Washington DC [Member] | Equity Method Investee [Member] | Prepaid Expenses and Other Current Assets [Member]
Related Party Transaction [Line Items]
Due from Related Parties	693,000	470,000
Liberty Commerz 1701 JFK Boulevard, LP [Member] | Philadelphia [Member] | Equity Method Investee [Member]
Related Party Transaction [Line Items]
Management Fees Revenue	2,700,000	2,400,000	$ 2,200,000
Liberty Commerz 1701 JFK Boulevard, LP [Member] | Philadelphia [Member] | Equity Method Investee [Member] | Prepaid Expenses and Other Current Assets [Member]
Related Party Transaction [Line Items]
Due from Related Parties	407,000	409,000
Liberty Commerz 1701 JFK Boulevard, LP [Member] | Philadelphia [Member] | Equity Method Investee [Member] | Investments in and advances to unconsolidated joint ventures [Member]
Related Party Transaction [Line Items]
Due to Related Parties	59,000	59,000
Liberty Property 18th & Arch [Member] | Philadelphia [Member] | Equity Method Investee [Member] | Prepaid Expenses and Other Current Assets [Member]
Related Party Transaction [Line Items]
Due to Related Parties		554,000
Liberty Property 18th & Arch [Member] | Philadelphia [Member] | Equity Method Investee [Member] | Other Liabilities [Member]
Related Party Transaction [Line Items]
Due to Related Parties	1,200,000
Liberty Property 18th & Arch [Member] | Philadelphia [Member] | Equity Method Investee [Member] | Other Income [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties	$ 5,100,000	1,800,000
Cambridge Medipark Ltd [Member] | United Kingdom [Member] | Equity Method Investee [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Rate	0.00%
Cambridge Medipark Ltd [Member] | United Kingdom [Member] | Equity Method Investee [Member] | Investments in and advances to unconsolidated joint ventures [Member]
Related Party Transaction [Line Items]
Notes Payable, Related Parties	$ 2,700,000	$ 2,900,000

Deferred Financing and Leasin81

Deferred Financing and Leasing Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Amortization of deferred financing costs	$ 4,395	$ 4,811	$ 4,084
Amortization of Deferred Leasing Costs and Intangible Leases, Acquired-in-place	44,200	51,300	$ 39,200
Finite-Lived Intangible Assets, Gross [Abstract]
Deferred financing costs, gross	11,917	11,917
Deferred leasing costs, gross	229,798	215,714
Intangible - market rent, gross	20,178	18,082
Intangible - origination value, gross	106,014	103,512
Finite-Lived Intangible Assets, Gross	367,907	349,225
Finite-Lived Intangible Assets, Accumulated Amortization [Abstract]
Deferred financing costs, accumulated amortization	(8,713)	(7,278)
Deferred leasing costs, accumulated amortization	(97,840)	(100,702)
Intangible - market rent, accumulated amortization	(10,358)	(8,266)
Intangible - origination value, accumulated amortization	(58,887)	(40,215)
Finite-Lived Intangible Assets, Accumulated Amortization	(175,798)	(156,461)
Deferred financing and leasing costs, net	$ 192,109	$ 192,764

Deferred Financing and Leasin82

Deferred Financing and Leasing Costs Finite-Lived Intangible Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Deferred financing costs, gross	$ 11,917,000	$ 11,917,000
Below Market Lease, Net	6,100,000	7,500,000
Amortization of above and below Market Leases	$ (1,900,000)	$ (2,800,000)	$ (290,000)
Above Market Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Remaining Amortization Period	3 years 8 months
Leases, Acquired-in-Place [Member]
Finite-Lived Intangible Assets [Line Items]
Remaining Amortization Period	4 years 5 months 2 days
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$ 16,378,000

Deferred Financing and Leasin83

Deferred Financing and Leasing Costs Intangible Amortization Schedule (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]
Deferred financing and leasing costs, net	$ 192,109	$ 192,764
Leases, Acquired-in-Place, Market Adjustment [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
2,016	1,804
2,017	1,705
2,018	1,222
2,019	709
2,020	(115)
Thereafter	(1,641)
Deferred financing and leasing costs, net	3,684
Leases, Acquired-in-Place [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
2,016	16,378
2,017	11,950
2,018	7,640
2,019	4,134
2,020	2,119
Thereafter	4,906
Deferred financing and leasing costs, net	$ 47,127

Indebtedness - Overview (Detail

Indebtedness - Overview (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Debt Disclosure [Abstract]
Debt, Weighted Average Interest Rate	4.60%	5.00%	5.10%
Interest Costs, Capitalized During Period	$ 16.7	$ 13.2	$ 9.6
Cash paid for interest	$ 149.6	$ 164.9	$ 143.2

Indebtedness - Amortization and

Indebtedness - Amortization and Maturity Schedule (Details) $ in Thousands	Dec. 31, 2015USD ($)
Debt Instrument [Line Items]
2,016	$ 326,398
2,017	307,580
2,018	392,572
2,019	56,709
2,020	420,721
2,021	67,417
2,022	402,172
2,023	302,281
2,024	452,385
2025 and thereafter	426,752
Debt Instrument, Face Amount	3,154,987
Debt, reconciling items to carrying amount	(7,971)
Long-term Debt, Maturities Total	$ 3,147,016
Long-term Debt, Weighted Average Interest Rate	4.42%
Principal Amortization, Mortgages [Member]
Debt Instrument [Line Items]
2,016	$ 9,518
2,017	8,688
2,018	6,470
2,019	6,666
2,020	3,351
2,021	2,326
2,022	2,172
2,023	2,281
2,024	2,385
2025 and thereafter	24,806
Debt Instrument, Face Amount	68,663
Debt, reconciling items to carrying amount	8,464
Long-term Debt, Maturities Total	77,127
Principal Maturities, Mortgages [Member]
Debt Instrument [Line Items]
2,016	16,880
2,017	2,349
2,018	27,102
2,019	50,043
2,020	67,370
2,021	65,091
2,022	0
2,023	0
2,024	0
2025 and thereafter	1,946
Debt Instrument, Face Amount	230,781
Debt, reconciling items to carrying amount	0
Long-term Debt, Maturities Total	230,781
Unsecured Debt [Member]
Debt Instrument [Line Items]
2,016	300,000
2,017	296,543
2,018	100,000
2,019	0
2,020	350,000
2,021	0
2,022	400,000
2,023	300,000
2,024	450,000
2025 and thereafter	400,000
Debt Instrument, Face Amount	2,596,543
Debt, reconciling items to carrying amount	(16,435)
Long-term Debt, Maturities Total	2,580,108
Line of Credit [Member]
Debt Instrument [Line Items]
2,016	0
2,017	0
2,018	259,000
2,019	0
2,020	0
2,021	0
2,022	0
2,023	0
2,024	0
2025 and thereafter	0
Debt Instrument, Face Amount	259,000
Debt, reconciling items to carrying amount	0
Long-term Debt, Maturities Total	$ 259,000
Due in Next Twelve Months [Member]
Debt Instrument [Line Items]
Long-term Debt, Weighted Average Interest Rate	5.53%
Due in Year Two [Member]
Debt Instrument [Line Items]
Long-term Debt, Weighted Average Interest Rate	6.57%
Due in Year Three [Member]
Debt Instrument [Line Items]
Long-term Debt, Weighted Average Interest Rate	3.26%
Due in Year Four [Member]
Debt Instrument [Line Items]
Long-term Debt, Weighted Average Interest Rate	4.00%
Due in Year Five [Member]
Debt Instrument [Line Items]
Long-term Debt, Weighted Average Interest Rate	4.82%
Due in Year Six [Member]
Debt Instrument [Line Items]
Long-term Debt, Weighted Average Interest Rate	4.06%
Due in Year Seven [Member]
Debt Instrument [Line Items]
Long-term Debt, Weighted Average Interest Rate	4.13%
Due in Year Eight [Member]
Debt Instrument [Line Items]
Long-term Debt, Weighted Average Interest Rate	3.39%
Due in Year Nine [Member]
Debt Instrument [Line Items]
Long-term Debt, Weighted Average Interest Rate	4.40%
Due After Year Nine [Member]
Debt Instrument [Line Items]
Long-term Debt, Weighted Average Interest Rate	3.81%

Indebtedness - Mortgage Loans,

Indebtedness - Mortgage Loans, Unsecured Notes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Aggregate notional amount	$ 101.4	$ 103.6
Mortgages [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date Range, Start	Jan. 1, 2016
Debt Instrument, Maturity Date Range, End	Dec. 31, 2033
Net Book Value of Collateralized Real Estate Properties	$ 603.5
Fixed Rate Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Amount	2,896
Aggregate notional amount	$ 101.4
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	3.00%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum	7.50%
Mortgage Loans and Unsecured Notes [Member]
Debt Instrument [Line Items]
Weighted Average Remaining Life	5 years 8 months

Indebtedness - Credit Facility

Indebtedness - Credit Facility (Details)	12 Months Ended
	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Line of Credit Facility [Line Items]
Debt Instrument, Face Amount	$ 3,154,987,000
Number of maturity extensions	2
Long-term Debt, Maturities Total	$ 3,147,016,000
Line of Credit Facility, Amount Outstanding	259,000,000	$ 167,000,000
Total Assets for Covenant Ratio	6,557,629,000	$ 6,612,014,000
Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Face Amount	$ 259,000,000
Debt Instrument, Basis Spread on Variable Rate	1.05%
Line of Credit Facility, Expiration Date	Mar. 1, 2018
Length of Maturity Extension	6 months
Line of Credit Facility, Competitive Bid Option, Percentage	50.00%
Long-term Debt, Maturities Total	$ 259,000,000
Line of Credit Facility, Maximum Borrowing Capacity	800,000,000
Accordion feature borrowing capacity	$ 400,000,000
Line of Credit Facility, Commitment Fee Percentage	0.20%
Line of Credit [Member] | Total Debt to Total Assets Ratio [Member]
Line of Credit Facility [Line Items]
Borrowed Funds for Covenant Ratio	$ 0.60
Total Assets for Covenant Ratio	$ 1
Line of Credit [Member] | EBITDA to Fixed Charges Ratio [Member]
Line of Credit Facility [Line Items]
Earnings Before Interest, Taxes, Depreciation and Amortization for Covenant Ratio	1.50
Line of Credit [Member] | Unsecured Debt to Unencumbered Asset Ratio [Member]
Line of Credit Facility [Line Items]
Unsecured Debt to Unencumbered Asset Value for Debt Covenant	60.00%
Line of Credit [Member] | Unencumbered Net Operating Income to Unsecured Interest Expense [Member]
Line of Credit Facility [Line Items]
Unencumbered Net Operating Income to Unsecured Interest Expense Value for Debt Covenant	175.00%

Indebtedness - Activity (Detail

Indebtedness - Activity (Details) - USD ($) $ in Thousands	Oct. 08, 2013	Dec. 31, 2015	Dec. 01, 2015	Aug. 01, 2015	Mar. 01, 2015	Dec. 31, 2014	Aug. 01, 2014	Mar. 01, 2014	Dec. 31, 2013	Sep. 27, 2013
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 3,154,987
Debt, Weighted Average Interest Rate		4.60%				5.00%			5.10%
Credit Facility [Domain] | Old Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity								$ 500,000
Credit Facility [Domain] | New Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity								$ 800,000
Senior Notes [Member] | 5.65% Senior Note [Member]
Debt Instrument [Line Items]
Stated Interest Rate							5.65%
Repurchased face amount of debt							$ 200,000
Senior Notes [Member] | 4.40% senior unsecured note [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount										$ 450,000
Senior Notes [Member] | 5.125% Senior Notes [Member]
Debt Instrument [Line Items]
Stated Interest Rate					5.125%
Repurchased face amount of debt					$ 300,000
Senior Notes [Member] | 3.75% Senior Notes [Member]
Debt Instrument [Line Items]
Stated Interest Rate					3.75%
Debt Instrument, Face Amount					$ 400,000
Mortgages [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date Range, Start		Jan. 1, 2016
Debt Instrument, Maturity Date Range, End		Dec. 31, 2033
Mortgages [Member] | 7.0% Mortgage [Member]
Debt Instrument [Line Items]
Stated Interest Rate				7.00%
Repurchased face amount of debt				$ 105,800
Mortgages [Member] | 7.5% Mortgage [Member]
Debt Instrument [Line Items]
Stated Interest Rate			7.50%
Repurchased face amount of debt			$ 59,700
Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 2,596,543
Unsecured Debt [Member] | 3.435% unsecured notes [Member]
Debt Instrument [Line Items]
Stated Interest Rate			3.40%
Repurchased face amount of debt			$ 16,000
Cabot Industrial Value Fund III [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Assumption of mortgage debt from acquisition	$ 229,800

Leasing Activity (Details)

Leasing Activity (Details) $ in Thousands	Dec. 31, 2015USD ($)
Operating Leases, Future Minimum Payments Receivable [Abstract]
2,016	$ 526,956
2,017	480,827
2,018	415,765
2,019	348,887
2,020	284,738
Thereafter	1,219,397
Operating Leases, Future Minimum Payments Due	$ 3,276,570

Noncontrolling Interest - Ope90

Noncontrolling Interest - Operating Partnership/Limited Partners' Equity - Preferred Units (Details) - USD ($) $ / shares in Units, shares in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Preferred Units [Line Items]
Preferred Units, Total Annual Cash Distributions			$ 1,600,000
Series I 2 [Member]
Preferred Units [Line Items]
Noncontrolling Interest in Operating Partnerships	$ 7,537,000
Redeemable stock, preferred units outstanding	301
Redeemable Preferred Units Liquidation Preference	$ 25
Preferred Stock Dividends Rate Percentage Or Per Dollar Amount	6.25%
Preferred Units, Total Annual Cash Distributions	$ 472,000	$ 472,000	$ 472,000

Shareholders' Equity - Common S

Shareholders' Equity - Common Shares (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)$ / sharesshares	Dec. 31, 2014USD ($)$ / sharesshares	Dec. 31, 2013USD ($)$ / sharesshares
Continuous Equity Offering [Abstract]
Common stock, Continuous equity offering program, Max amount of equity	$ 200,000
Proceeds from Issuance of Common Stock	38,797	$ 58,473	$ 969,468
Common units [Member]
Common Shares [Abstract]
Dividends, Common Stock, Cash	$ 289,300	$ 286,900	$ 247,400
Common Stock, Ordinary Dividend, Per Share, Cash Paid | $ / shares	$ 1.4348	$ 1.2556	$ 1.4312
Common Stock, Capital gain 20%, Per Share, Cash Paid | $ / shares	0.1112	0	0.0016
Common Stock, IRC SEC 1250 unrecaptured gain 25%, Per Share, Cash Paid | $ / shares	0.3372	0.3712	0.4672
Common Stock, Return of Capital, Per Share, Cash Paid | $ / shares	0.0168	0.2732	0
Common Stock, Dividends, Per Share, Cash Paid | $ / shares	$ 1.9000	$ 1.9000	$ 1.9000
Common shares [Member]
Common Units [Abstract]
Units issued as a result of acquisitions | shares	0	0	0
Dividend Reinvestment and Share Purchase Plan [Abstract]
Stock Issued During Period, Shares, Dividend Reinvestment Plan | shares	1,036,437	1,643,536	1,248,842
Continuous Equity Offering [Abstract]
Number of common shares issued | shares	0	0	1,900,000
Proceeds from Issuance of Common Stock			$ 75,000
Share Repurchase [Abstract]
Share repurchase, shares | shares	2,321,794	0	0
2015 Share Repurchase Program [Member] | Common shares [Member]
Share Repurchase [Abstract]
Stock Repurchase Program, Authorized Amount	$ 250,000
Share repurchase, shares | shares	2,300,000
Share repurchase, value	$ 71,800
Liberty Property Limited Partnership [Member]
Common Units [Abstract]
Common units outstanding | shares	3,539,075	3,556,566
Redeemable Noncontrolling Interest, Equity, Common, Fair Value	$ 109,900
Liberty Property Limited Partnership [Member] | Common units [Member]
Common Units [Abstract]
Units issued as a result of acquisitions | shares	0	0	0
Dividend Reinvestment and Share Purchase Plan [Abstract]
Stock Issued During Period, Shares, Dividend Reinvestment Plan | shares	1,036,437	1,643,536	1,248,842
Continuous Equity Offering [Abstract]
Common stock, Continuous equity offering program, Max amount of equity	$ 200,000
Number of common shares issued | shares	0	0	1,900,000
Proceeds from Issuance of Common Stock			$ 75,000
Liberty Property Limited Partnership [Member] | 2015 Share Repurchase Program [Member] | Common units [Member]
Share Repurchase [Abstract]
Stock Repurchase Program, Authorized Amount	$ 250,000
Share repurchase, shares | shares	2,300,000
Share repurchase, value	$ 71,800
Conversion Ratio of Common Units to Common Shares [Member]
Common Units [Abstract]
Common Unit, Convertible to Common Stock	1
Common Stock, Converted from Common Unit	1

Shareholders' Equity - Preferre

Shareholders' Equity - Preferred Units (Details) - USD ($)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014
Preferred Units Description and Other Disclosures [Abstract]
Preferred Stock Redemption Premium	$ 1,236,000
Preferred Units, Total Annual Cash Distributions	1,600,000
Authorized but Unissued Preferred Shares		16,013,000
Preferred Units, Outstanding		0	0
Series E Preferred Stock [Member]
Preferred Units Description and Other Disclosures [Abstract]
Stock Redeemed or Called During Period, Value	$ 20,000,000
Preferred Stock Dividends Rate Percentage Or Per Dollar Amount	7.00%
Preferred Units, Annual Cash Distributions	$ 1.21
Series F Preferred Stock [Member]
Preferred Units Description and Other Disclosures [Abstract]
Stock Redeemed or Called During Period, Value	$ 17,500,000
Preferred Stock Dividends Rate Percentage Or Per Dollar Amount	6.65%
Preferred Units, Annual Cash Distributions	$ 1.32
Series G Preferred Stock [Member]
Preferred Units Description and Other Disclosures [Abstract]
Stock Redeemed or Called During Period, Value	$ 27,000,000
Preferred Stock Dividends Rate Percentage Or Per Dollar Amount	6.70%
Preferred Units, Annual Cash Distributions	$ 1.33

Preferred Units (Details)

Preferred Units (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Preferred Units Description and Other Disclosures [Abstract]
Preferred Units, Outstanding	0	0
Preferred Stock Redemption Premium			$ 1,236,000
Preferred Units, Total Annual Cash Distributions			$ 1,600,000
Series E Preferred Stock [Member]
Preferred Units Description and Other Disclosures [Abstract]
Preferred Units, Annual Cash Distributions			$ 1.21
Stock Redeemed or Called During Period, Value			$ 20,000,000
Preferred Stock Dividends Rate Percentage Or Per Dollar Amount			7.00%
Series F Preferred Stock [Member]
Preferred Units Description and Other Disclosures [Abstract]
Preferred Units, Annual Cash Distributions			$ 1.32
Stock Redeemed or Called During Period, Value			$ 17,500,000
Preferred Stock Dividends Rate Percentage Or Per Dollar Amount			6.65%
Series G Preferred Stock [Member]
Preferred Units Description and Other Disclosures [Abstract]
Preferred Units, Annual Cash Distributions			$ 1.33
Stock Redeemed or Called During Period, Value			$ 27,000,000
Preferred Stock Dividends Rate Percentage Or Per Dollar Amount			6.70%
Liberty Property Limited Partnership [Member]
Preferred Units Description and Other Disclosures [Abstract]
Preferred Units, Outstanding	0	0
Preferred Stock Redemption Premium	$ 0	$ 0	$ 1,236,000
Preferred Units, Total Annual Cash Distributions			$ 1,600,000
Liberty Property Limited Partnership [Member] | Series E Preferred Stock [Member]
Preferred Units Description and Other Disclosures [Abstract]
Preferred Units, Annual Cash Distributions			$ 1.21
Stock Redeemed or Called During Period, Value			$ 20,000,000
Preferred Stock Dividends Rate Percentage Or Per Dollar Amount			7.00%
Liberty Property Limited Partnership [Member] | Series F Preferred Stock [Member]
Preferred Units Description and Other Disclosures [Abstract]
Preferred Units, Annual Cash Distributions			$ 1.32
Stock Redeemed or Called During Period, Value			$ 17,500,000
Preferred Stock Dividends Rate Percentage Or Per Dollar Amount			6.65%
Liberty Property Limited Partnership [Member] | Series G Preferred Stock [Member]
Preferred Units Description and Other Disclosures [Abstract]
Preferred Units, Annual Cash Distributions			$ 1.33
Stock Redeemed or Called During Period, Value			$ 27,000,000
Preferred Stock Dividends Rate Percentage Or Per Dollar Amount			6.70%

Owners' Equity - Operating Pa94

Owners' Equity - Operating Partnership Common Units (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Continuous Equity Offering [Abstract]
Common stock, Continuous equity offering program, Max amount of equity	$ 200,000
Proceeds from Issuance of Common Stock	$ 38,797	$ 58,473	$ 969,468
Liberty Property Limited Partnership [Member] | Common units [Member]
Class of Stock [Line Items]
Units issued as a result of acquisitions	0	0	0
Dividend Reinvestment and Share Purchase Plan [Abstract]
Stock Issued During Period, Shares, Dividend Reinvestment Plan	1,036,437	1,643,536	1,248,842
Continuous Equity Offering [Abstract]
Common stock, Continuous equity offering program, Max amount of equity	$ 200,000
Number of common units issued	0	0	1,900,000
Proceeds from Issuance of Common Stock			$ 75,000
Liberty Property Limited Partnership [Member] | 2015 Share Repurchase Program [Member] | Common units [Member]
Share Repurchase [Abstract]
Stock Repurchase Program, Authorized Amount	$ 250,000
Share repurchase, shares	2,300,000
Share repurchase, value	$ 71,800

Employee Benefit Plans (Details

Employee Benefit Plans (Details) - United States Pension Plan of US Entity [Member] - 401(k) [Member] - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan, Cost Recognized	$ 1,038,000	$ 943,000	$ 923,000
Maximum [Member]
Defined Contribution Plan Disclosure [Line Items]
Company Match for Defined Contribution Plan	3.00%

Share Based Compensation (Detai

Share Based Compensation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized	21,100,000
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]
Common shares reserved for future issuance	5,574,605	6,100,098	6,637,761
ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized	750,000
Allocated Share-based Compensation Expense	$ 62,000	$ 104,000	$ 71,000
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]
Maximum percent of salary contributed	10.00%
Discount on market value of shares	15.00%
Shares issued	13,127	12,612	16,793
Stock Options [Member] | Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period	3 years
Allocated Share-based Compensation Expense	$ 1,500,000	$ 1,800,000	$ 1,600,000
Options [Abstract]
option term	10 years
Weighted average fair value of options granted	$ 4.11	$ 4.09	$ 7.18
Exercise price for options outstanding lower limit	20.32
Exercise price for options outstanding upper limit	$ 49.74
weighted average remaining contractual life of option outstanding	5 years 4 months 14 days
Weighted average remaining contractual life of options exercisable	3 years 11 months 1 day
Number of options outstanding and exercisable that had an exercise price higher than closing price of the Company's shares	1,700,000
Number of options outstanding and exercisable that had an exercise price lower than the Company's share price	141,000
Total intrinsic value of options exercised	$ 364,000	$ 310,000	$ 4,900,000
Total cash received from the exercise of options	2,100,000	$ 1,400,000	$ 15,200,000
Unrecognized compensation costs related to nonvested options	$ 250,000
Compensation costs not yet recognized, period for recognition	9 months 9 days
Aggregate intrinsic value of options	$ 1,200,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Risk-free interest rate	1.80%	1.60%	1.10%
Volatility	24.00%	23.60%	35.60%
Stock Options [Member] | First Portion [Member] | Options [Member]
Options [Abstract]
Vesting percent	20.00%
Stock Options [Member] | Second Portion [Member] | Options [Member]
Options [Abstract]
Vesting percent	50.00%
Stock Options [Member] | Third Portion [Member] | Options [Member]
Options [Abstract]
Vesting percent	100.00%
Restricted Stock [Member] | Long Term Incentive Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period	5 years
Allocated Share-based Compensation Expense	$ 10,000,000	$ 9,000,000	$ 9,100,000
Options [Abstract]
Compensation costs not yet recognized, period for recognition	1 year 2 months 1 day
Long Term Incentive Shares [Abstract]
Weighted Average Grant Date Fair Value - Granted	$ 35.14	$ 37.13	$ 39.42
Shares granted	216,000
Total unrecognized compensation cost related to nonvested shares	$ 10,300,000
Total fair value of restricted shares vested	$ 7,400,000	$ 9,300,000	$ 9,900,000
Restricted Stock Units (RSUs) [Member] | First Portion [Member] | 2008 plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period	3 years
Restricted Stock Units (RSUs) [Member] | First Portion [Member] | 2008 plan [Member] | 2015 Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Risk-free interest rate	0.99%
Volatility	17.00%
Restricted Stock Units (RSUs) [Member] | First Portion [Member] | 2008 plan [Member] | 2014 Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Risk-free interest rate		0.68%
Volatility		24.00%
Restricted Stock Units (RSUs) [Member] | First Portion [Member] | 2008 plan [Member] | 2013 Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Risk-free interest rate			0.35%
Volatility			26.00%
Restricted Stock Units (RSUs) [Member] | Second Portion [Member] | 2008 plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period	3 years
Bonus Shares [Member] | Bonus Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	$ 3,900,000	$ 3,900,000	$ 3,100,000
Long Term Incentive Shares [Abstract]
Shares granted	111,700	103,834	79,271
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]
Percent Applied to Bonuses Taken in Cash	120.00%
Performance Shares [Member] | Profit Sharing Plan [Member]
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]
Maximum percent of salary contributed	5.00%
Profit sharing plan expense	$ 965,000	$ 543,000	$ 698,000
Chief Executive Officer [Member] | Restricted Stock Units (RSUs) [Member] | Maximum [Member] | 2014 Grant [Member]
Options [Abstract]
Vesting percent		272.00%
Chief Executive Officer [Member] | Restricted Stock Units (RSUs) [Member] | Maximum [Member] | 2013 Grant [Member]
Options [Abstract]
Vesting percent			272.00%
Chief Executive Officer [Member] | Restricted Stock Units (RSUs) [Member] | 2008 plan [Member] | 2015 Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period	3 years
Chief Executive Officer [Member] | Restricted Stock Units (RSUs) [Member] | 2008 plan [Member] | Maximum [Member] | 2015 Grant [Member]
Options [Abstract]
Vesting percent	272.00%
Chief Executive Officer [Member] | Restricted Stock Units (RSUs) [Member] | First Portion [Member] | 2008 plan [Member] | 2015 Grant [Member]
Long Term Incentive Shares [Abstract]
Monte Carlo RSU Valuation	110.00%
Chief Executive Officer [Member] | Restricted Stock Units (RSUs) [Member] | First Portion [Member] | 2008 plan [Member] | 2014 Grant [Member]
Long Term Incentive Shares [Abstract]
Monte Carlo RSU Valuation		157.00%
Chief Executive Officer [Member] | Restricted Stock Units (RSUs) [Member] | First Portion [Member] | 2008 plan [Member] | 2013 Grant [Member]
Long Term Incentive Shares [Abstract]
Monte Carlo RSU Valuation			150.00%
Executives Other [Member] | Restricted Stock Units (RSUs) [Member] | Maximum [Member] | 2014 Grant [Member]
Options [Abstract]
Vesting percent		200.00%
Executives Other [Member] | Restricted Stock Units (RSUs) [Member] | Maximum [Member] | 2013 Grant [Member]
Options [Abstract]
Vesting percent			200.00%
Executives Other [Member] | Restricted Stock Units (RSUs) [Member] | 2008 plan [Member] | 2015 Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period	3 years
Executives Other [Member] | Restricted Stock Units (RSUs) [Member] | 2008 plan [Member] | Maximum [Member] | 2015 Grant [Member]
Options [Abstract]
Vesting percent	200.00%
Executives Other [Member] | Restricted Stock Units (RSUs) [Member] | First Portion [Member] | 2008 plan [Member] | 2015 Grant [Member]
Long Term Incentive Shares [Abstract]
Monte Carlo RSU Valuation	90.00%
Executives Other [Member] | Restricted Stock Units (RSUs) [Member] | First Portion [Member] | 2008 plan [Member] | 2014 Grant [Member]
Long Term Incentive Shares [Abstract]
Monte Carlo RSU Valuation		125.00%
Executives Other [Member] | Restricted Stock Units (RSUs) [Member] | First Portion [Member] | 2008 plan [Member] | 2013 Grant [Member]
Long Term Incentive Shares [Abstract]
Monte Carlo RSU Valuation			121.00%

Share Based Compensation - Opti

Share Based Compensation - Option Grant Information (Details) - Options [Member] - Stock Options [Member]	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	1.80%	1.60%	1.10%
Dividend yield	5.20%	5.20%	5.40%
Historical volatility factor	24.00%	23.60%	35.60%
Weighted-average expected life	7 years	6 years	6 years

Share Based Compensation - Op98

Share Based Compensation - Option Rollforward (Details) - Options [Member] - Stock Options [Member] shares in Thousands	12 Months Ended
	Dec. 31, 2015$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Exercise Price - Outstanding January 1, 2015 | $ / shares	$ 36.48
Weighted Average Exercise Price - Granted | $ / shares	35.18
Weighted Average Exercise Price - Exercised | $ / shares	32.38
Weighted Average Exercise Price - Forfeited | $ / shares	41.53
Weighted Average Exercise Price - Outstanding December 31, 2015 | $ / shares	$ 36.08
Exercisable at December 31, 2015 | shares	1,795
Weighted Average Exercise Price - Exercisable at December 31, 2015 | $ / shares	$ 35.84
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding January 1, 2015 | shares	2,492
Granted | shares	353
Exercised | shares	(65)
Forfeited | shares	(171)
Outstanding December 31, 2015 | shares	2,609

Share Based Compensation - Shar

Share Based Compensation - Share rollforward (Details) - Long Term Incentive Shares [Member] - Restricted Stock [Member] - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant Date Fair Value - Nonvested at January 1, 2015	$ 36.89
Weighted Average Grant Date Fair Value - Granted	35.14	$ 37.13	$ 39.42
Weighted Average Grant Date Fair Value - Vested	35.61
Weighted Average Grant Date Fair Value - Forfeited	36.68
Weighted Average Grant Date Fair Value - Nonvested at December 31, 2015	$ 36.75	$ 36.89
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested at January 1, 2015	753
Granted	216
Vested	(207)
Forfeited	(39)
Nonvested at December 31, 2015	723	753

Commitments and Contingencies -

Commitments and Contingencies - Future Minimum Rental Payments (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
2,016	$ 1,038,000
2,017	1,038,000
2,018	1,038,000
2,019	1,038,000
2,020	1,038,000
2021 through 2034	6,754,000
Total	11,944,000
Other Expenses [Abstract]
Operating Ground Lease Expense	$ 815,000	$ 454,000	$ 210,000

Commitments and Contingencie101

Commitments and Contingencies - Loss Contingencies (Details) $ in Millions	Dec. 31, 2015USD ($)
Loss Contingency, Information about Litigation Matters [Abstract]
Loss Contingency, Pending Claims, Number	0
Other [Abstract]
Letters of Credit Outstanding, Amount	$ 5.9
Contractual Obligation	$ 4

Commitments and Contingencie102

Commitments and Contingencies - Supply Commitments (Details) $ in Thousands, ft² in Millions	Dec. 31, 2015USD ($)ft²bldg	Dec. 31, 2014USD ($)
Supply Commitment [Line Items]
Development in progress	$ 360,948	$ 277,411
Deferred leasing costs, gross	$ 229,798	$ 215,714
Construction in Progress [Member]
Supply Commitment [Line Items]
Number of buildings | bldg	27
Leaseable square feet (unaudited) | ft²	6.8
Anticipated aggregate investment	$ 672,000
Deferred leasing costs, gross	16,100
Building and land parcels [Member]
Supply Commitment [Line Items]
Remaining amount committed or obligated to pay for the benefit of current or future tenants	42,000
Tenant Improvements [Member]
Supply Commitment [Line Items]
Supply Commitment, Remaining Maximum Amount Committed	$ 53,500

Commitments and Contingencie103

Commitments and Contingencies - Purchase Commitments (Details) $ in Millions	Dec. 31, 2015USD ($)
Land Purchases [Member]
Long-term Purchase Commitment [Line Items]
Remaining amount committed to future land purchases	$ 31.9

Quarterly Results of Operati104

Quarterly Results of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information [Line Items]
Gain (Loss) on Sale of Properties										$ 100,314	$ 91,778	$ 98,651
Operating revenue		$ 199,382	$ 198,972	$ 203,518	$ 206,901	$ 203,685	$ 198,356	$ 192,960	$ 197,630	808,773	792,631	645,930
Income from continuing operations		82,363	93,695	36,526	31,862	84,193	35,318	29,811	26,260	244,446	175,582	97,755
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest		0	0	0	0	306	133	296	47,846	0	48,581	121,839
Net income		$ 82,363	$ 93,695	$ 36,526	$ 31,862	$ 84,499	$ 35,451	$ 30,107	$ 74,106	$ 244,446	$ 224,163	$ 219,594
Income per common share - basic	[1]	$ 0.55	$ 0.61	$ 0.24	$ 0.21	$ 0.56	$ 0.23	$ 0.20	$ 0.49
Income per common share - diluted	[1]	$ 0.55	$ 0.61	$ 0.24	$ 0.21	$ 0.55	$ 0.23	$ 0.20	$ 0.49
[1]	The sum of quarterly financial data may vary from the annual data due to rounding.

Segment Information - Performan

Segment Information - Performance of the Reportable Segments Based on Property Level Operating Income (Details) - USD ($)		3 Months Ended								12 Months Ended
		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Operating revenue		$ 199,382,000	$ 198,972,000	$ 203,518,000	$ 206,901,000	$ 203,685,000	$ 198,356,000	$ 192,960,000	$ 197,630,000	$ 808,773,000	$ 792,631,000	$ 645,930,000
Operating Income (Loss)										257,132,000	257,306,000	202,799,000
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Interest expense										(135,779,000)	(151,887,000)	(127,115,000)
Depreciation and amortization expense										(229,779,000)	(236,075,000)	(205,147,000)
Impairment - real estate assets										(18,244,000)	(117,000)	(248,000)
Gain on property dispositions										100,314,000	45,147,000	0
Equity in earnings of unconsolidated joint ventures										3,149,000	10,314,000	6,067,000
General and administrative expense										(68,710,000)	(63,327,000)	(74,564,000)
Income taxes										(3,233,000)	(2,967,000)	(2,799,000)
Income from continuing operations		$ 82,363,000	$ 93,695,000	$ 36,526,000	$ 31,862,000	$ 84,193,000	$ 35,318,000	$ 29,811,000	$ 26,260,000	244,446,000	175,582,000	97,755,000
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating revenue										808,683,000	797,723,000	758,965,000
Operating Income (Loss)										504,774,000	493,234,000	450,678,000
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Operating revenue										0	(4,728,000)	(113,586,000)
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Operating revenue										90,000	(364,000)	551,000
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Interest expense	[1]									(135,779,000)	(152,444,000)	(143,018,000)
Depreciation and amortization expense	[1],[2]									(166,500,000)	(177,715,000)	(138,128,000)
Impairment - real estate assets										(18,244,000)	(117,000)	(248,000)
Gain on property dispositions										100,314,000	45,147,000	0
Equity in earnings of unconsolidated joint ventures										3,149,000	10,314,000	6,067,000
General and administrative expense	[1],[2]									(44,529,000)	(38,041,000)	(50,998,000)
Discontinued operations excluding gain on property dispositions										0	1,950,000	26,455,000
Income taxes	[2]									(2,911,000)	(2,781,000)	(2,748,000)
Other										4,172,000	(65,000)	2,605,000
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Operating revenue										0	0	0
North America [Member] | Operating Segments [Member] | Carolinas [Member]
Segment Reporting Information [Line Items]
Operating revenue										40,917,000	35,870,000	30,243,000
Operating Income (Loss)										28,594,000	24,578,000	20,434,000
North America [Member] | Operating Segments [Member] | Chicago Milwaukee [Member]
Segment Reporting Information [Line Items]
Operating revenue										37,431,000	33,068,000	18,083,000
Operating Income (Loss)										24,851,000	20,856,000	11,726,000
North America [Member] | Operating Segments [Member] | Houston [Member]
Segment Reporting Information [Line Items]
Operating revenue										54,031,000	49,309,000	37,773,000
Operating Income (Loss)										31,159,000	29,134,000	22,632,000
North America [Member] | Operating Segments [Member] | Lehigh Central PA [Member]
Segment Reporting Information [Line Items]
Operating revenue										133,473,000	118,145,000	101,101,000
Operating Income (Loss)										94,972,000	82,050,000	68,504,000
North America [Member] | Operating Segments [Member] | Minnesota [Member]
Segment Reporting Information [Line Items]
Operating revenue										47,932,000	54,892,000	62,415,000
Operating Income (Loss)										20,112,000	26,464,000	30,016,000
North America [Member] | Operating Segments [Member] | Orlando [Member]
Segment Reporting Information [Line Items]
Operating revenue										21,802,000	32,674,000	31,400,000
Operating Income (Loss)										14,842,000	21,472,000	20,506,000
North America [Member] | Operating Segments [Member] | Philadelphia [Member]
Segment Reporting Information [Line Items]
Operating revenue										40,490,000	35,238,000	31,690,000
Operating Income (Loss)										29,679,000	26,722,000	23,587,000
North America [Member] | Operating Segments [Member] | Richmond Hampton Roads [Member]
Segment Reporting Information [Line Items]
Operating revenue										31,033,000	40,911,000	40,247,000
Operating Income (Loss)										19,255,000	24,357,000	24,063,000
North America [Member] | Operating Segments [Member] | Southeastern PA [Member]
Segment Reporting Information [Line Items]
Operating revenue										147,712,000	148,714,000	165,248,000
Operating Income (Loss)										80,458,000	81,183,000	91,193,000
North America [Member] | Operating Segments [Member] | South Florida [Member]
Segment Reporting Information [Line Items]
Operating revenue										50,638,000	48,804,000	38,464,000
Operating Income (Loss)										28,308,000	27,947,000	20,943,000
North America [Member] | Operating Segments [Member] | Tampa [Member]
Segment Reporting Information [Line Items]
Operating revenue										54,744,000	53,725,000	52,230,000
Operating Income (Loss)										34,133,000	33,776,000	33,042,000
North America [Member] | Operating Segments [Member] | Other Segments [Member]
Segment Reporting Information [Line Items]
Operating revenue	[3]									133,345,000	130,013,000	142,402,000
Operating Income (Loss)										87,925,000	83,991,000	81,435,000
UNITED KINGDOM | Operating Segments [Member] | United Kingdom [Member]
Segment Reporting Information [Line Items]
Operating revenue										15,135,000	16,360,000	7,669,000
Operating Income (Loss)										$ 10,486,000	$ 10,704,000	$ 2,597,000
[1]	Includes activity on discontinued operations.
[2]	Excludes costs which are included in determining segment-level net operating income.
[3]	A substantial portion of the buildings contributing to office operating revenue in 2013 were sold in conjunction with the Portfolio Sale. See Footnote 19.

Segment Information - Depreciat

Segment Information - Depreciation and amortization of leasing transaction costs (Details) - Operating Segments [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Depreciation and amortization of tenant improvement and lease transaction costs	$ 60,075	$ 54,903	$ 64,549
UNITED KINGDOM | United Kingdom [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization of tenant improvement and lease transaction costs	292	177	172
North America [Member] | Carolinas [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization of tenant improvement and lease transaction costs	2,413	2,329	1,935
North America [Member] | Chicago Milwaukee [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization of tenant improvement and lease transaction costs	1,161	466	251
North America [Member] | Houston [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization of tenant improvement and lease transaction costs	4,466	3,988	3,200
North America [Member] | Lehigh Central PA [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization of tenant improvement and lease transaction costs	11,641	10,157	9,781
North America [Member] | Minnesota [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization of tenant improvement and lease transaction costs	4,986	4,478	5,797
North America [Member] | Orlando [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization of tenant improvement and lease transaction costs	1,963	3,116	3,037
North America [Member] | Philadelphia [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization of tenant improvement and lease transaction costs	2,220	1,803	1,729
North America [Member] | Richmond Hampton Roads [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization of tenant improvement and lease transaction costs	2,894	4,278	4,156
North America [Member] | South Florida [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization of tenant improvement and lease transaction costs	3,572	2,824	2,979
North America [Member] | Southeastern PA [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization of tenant improvement and lease transaction costs	12,346	12,272	15,040
North America [Member] | Tampa [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization of tenant improvement and lease transaction costs	3,872	3,384	3,033
North America [Member] | Other Segments [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization of tenant improvement and lease transaction costs	$ 8,249	$ 5,631	$ 13,439

Segment Information - Operating

Segment Information - Operating Revenues by Segment and Type (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenue from External Customer [Line Items]
Operating revenue		$ 199,382	$ 198,972	$ 203,518	$ 206,901	$ 203,685	$ 198,356	$ 192,960	$ 197,630	$ 808,773	$ 792,631	$ 645,930
Operating Segments [Member]
Revenue from External Customer [Line Items]
Operating revenue										808,683	797,723	758,965
Segment Reconciling Items [Member]
Revenue from External Customer [Line Items]
Operating revenue										0	(4,728)	(113,586)
Corporate, Non-Segment [Member]
Revenue from External Customer [Line Items]
Operating revenue										90	(364)	551
North America [Member] | Operating Segments [Member] | Carolinas [Member]
Revenue from External Customer [Line Items]
Operating revenue										40,917	35,870	30,243
North America [Member] | Operating Segments [Member] | Chicago Milwaukee [Member]
Revenue from External Customer [Line Items]
Operating revenue										37,431	33,068	18,083
North America [Member] | Operating Segments [Member] | Houston [Member]
Revenue from External Customer [Line Items]
Operating revenue										54,031	49,309	37,773
North America [Member] | Operating Segments [Member] | Lehigh Central PA [Member]
Revenue from External Customer [Line Items]
Operating revenue										133,473	118,145	101,101
North America [Member] | Operating Segments [Member] | Minnesota [Member]
Revenue from External Customer [Line Items]
Operating revenue										47,932	54,892	62,415
North America [Member] | Operating Segments [Member] | Orlando [Member]
Revenue from External Customer [Line Items]
Operating revenue										21,802	32,674	31,400
North America [Member] | Operating Segments [Member] | Philadelphia [Member]
Revenue from External Customer [Line Items]
Operating revenue										40,490	35,238	31,690
North America [Member] | Operating Segments [Member] | Richmond Hampton Roads [Member]
Revenue from External Customer [Line Items]
Operating revenue										31,033	40,911	40,247
North America [Member] | Operating Segments [Member] | South Florida [Member]
Revenue from External Customer [Line Items]
Operating revenue										50,638	48,804	38,464
North America [Member] | Operating Segments [Member] | Southeastern PA [Member]
Revenue from External Customer [Line Items]
Operating revenue										147,712	148,714	165,248
North America [Member] | Operating Segments [Member] | Tampa [Member]
Revenue from External Customer [Line Items]
Operating revenue										54,744	53,725	52,230
North America [Member] | Operating Segments [Member] | Other Segments [Member]
Revenue from External Customer [Line Items]
Operating revenue	[1]									133,345	130,013	142,402
UNITED KINGDOM | Operating Segments [Member] | United Kingdom [Member]
Revenue from External Customer [Line Items]
Operating revenue										15,135	16,360	7,669
Industrial Property [Member] | Operating Segments [Member]
Revenue from External Customer [Line Items]
Operating revenue										514,896	477,788	368,921
Industrial Property [Member] | North America [Member] | Operating Segments [Member] | Carolinas [Member]
Revenue from External Customer [Line Items]
Operating revenue										40,917	35,870	30,243
Industrial Property [Member] | North America [Member] | Operating Segments [Member] | Chicago Milwaukee [Member]
Revenue from External Customer [Line Items]
Operating revenue										37,431	33,068	18,083
Industrial Property [Member] | North America [Member] | Operating Segments [Member] | Houston [Member]
Revenue from External Customer [Line Items]
Operating revenue										53,802	49,309	37,773
Industrial Property [Member] | North America [Member] | Operating Segments [Member] | Lehigh Central PA [Member]
Revenue from External Customer [Line Items]
Operating revenue										131,168	115,821	98,715
Industrial Property [Member] | North America [Member] | Operating Segments [Member] | Minnesota [Member]
Revenue from External Customer [Line Items]
Operating revenue										24,721	25,378	32,043
Industrial Property [Member] | North America [Member] | Operating Segments [Member] | Orlando [Member]
Revenue from External Customer [Line Items]
Operating revenue										20,056	18,635	16,535
Industrial Property [Member] | North America [Member] | Operating Segments [Member] | Philadelphia [Member]
Revenue from External Customer [Line Items]
Operating revenue										11,809	10,072	9,534
Industrial Property [Member] | North America [Member] | Operating Segments [Member] | Richmond Hampton Roads [Member]
Revenue from External Customer [Line Items]
Operating revenue										21,158	20,924	19,073
Industrial Property [Member] | North America [Member] | Operating Segments [Member] | South Florida [Member]
Revenue from External Customer [Line Items]
Operating revenue										20,740	18,603	7,955
Industrial Property [Member] | North America [Member] | Operating Segments [Member] | Southeastern PA [Member]
Revenue from External Customer [Line Items]
Operating revenue										28,457	28,895	27,076
Industrial Property [Member] | North America [Member] | Operating Segments [Member] | Tampa [Member]
Revenue from External Customer [Line Items]
Operating revenue										26,353	25,451	24,331
Industrial Property [Member] | North America [Member] | Operating Segments [Member] | Other Segments [Member]
Revenue from External Customer [Line Items]
Operating revenue	[1]									86,180	82,672	43,355
Industrial Property [Member] | UNITED KINGDOM | Operating Segments [Member] | United Kingdom [Member]
Revenue from External Customer [Line Items]
Operating revenue										12,104	13,090	4,205
Office Building [Member] | Operating Segments [Member]
Revenue from External Customer [Line Items]
Operating revenue										293,787	319,935	390,044
Office Building [Member] | North America [Member] | Operating Segments [Member] | Carolinas [Member]
Revenue from External Customer [Line Items]
Operating revenue										0	0	0
Office Building [Member] | North America [Member] | Operating Segments [Member] | Chicago Milwaukee [Member]
Revenue from External Customer [Line Items]
Operating revenue										0	0	0
Office Building [Member] | North America [Member] | Operating Segments [Member] | Houston [Member]
Revenue from External Customer [Line Items]
Operating revenue										229	0	0
Office Building [Member] | North America [Member] | Operating Segments [Member] | Lehigh Central PA [Member]
Revenue from External Customer [Line Items]
Operating revenue										2,305	2,324	2,386
Office Building [Member] | North America [Member] | Operating Segments [Member] | Minnesota [Member]
Revenue from External Customer [Line Items]
Operating revenue										23,211	29,514	30,372
Office Building [Member] | North America [Member] | Operating Segments [Member] | Orlando [Member]
Revenue from External Customer [Line Items]
Operating revenue										1,746	14,039	14,865
Office Building [Member] | North America [Member] | Operating Segments [Member] | Philadelphia [Member]
Revenue from External Customer [Line Items]
Operating revenue										28,681	25,166	22,156
Office Building [Member] | North America [Member] | Operating Segments [Member] | Richmond Hampton Roads [Member]
Revenue from External Customer [Line Items]
Operating revenue										9,875	19,987	21,174
Office Building [Member] | North America [Member] | Operating Segments [Member] | South Florida [Member]
Revenue from External Customer [Line Items]
Operating revenue										29,898	30,201	30,509
Office Building [Member] | North America [Member] | Operating Segments [Member] | Southeastern PA [Member]
Revenue from External Customer [Line Items]
Operating revenue										119,255	119,819	138,172
Office Building [Member] | North America [Member] | Operating Segments [Member] | Tampa [Member]
Revenue from External Customer [Line Items]
Operating revenue										28,391	28,274	27,899
Office Building [Member] | North America [Member] | Operating Segments [Member] | Other Segments [Member]
Revenue from External Customer [Line Items]
Operating revenue	[1]									47,165	47,341	99,047
Office Building [Member] | UNITED KINGDOM | Operating Segments [Member] | United Kingdom [Member]
Revenue from External Customer [Line Items]
Operating revenue										$ 3,031	$ 3,270	$ 3,464
[1]	A substantial portion of the buildings contributing to office operating revenue in 2013 were sold in conjunction with the Portfolio Sale. See Footnote 19.

Segment Information - Total Ass

Segment Information - Total Assets by Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Assets	$ 6,557,629	$ 6,612,014
Operating Segments [Member]
Segment Reporting Information [Line Items]
Assets	6,493,176	6,519,239
Operating Segments [Member] | Carolinas [Member] | North America [Member]
Segment Reporting Information [Line Items]
Assets	338,273	325,690
Operating Segments [Member] | Chicago Milwaukee [Member] | North America [Member]
Segment Reporting Information [Line Items]
Assets	429,390	422,531
Operating Segments [Member] | Houston [Member] | North America [Member]
Segment Reporting Information [Line Items]
Assets	522,285	418,154
Operating Segments [Member] | Lehigh Central PA [Member] | North America [Member]
Segment Reporting Information [Line Items]
Assets	1,157,468	1,023,641
Operating Segments [Member] | Minnesota [Member] | North America [Member]
Segment Reporting Information [Line Items]
Assets	346,840	333,506
Operating Segments [Member] | Orlando [Member] | North America [Member]
Segment Reporting Information [Line Items]
Assets	138,181	160,899
Operating Segments [Member] | Philadelphia [Member] | North America [Member]
Segment Reporting Information [Line Items]
Assets	444,889	366,243
Operating Segments [Member] | Richmond Hampton Roads [Member] | North America [Member]
Segment Reporting Information [Line Items]
Assets	128,825	250,205
Operating Segments [Member] | South Florida [Member] | North America [Member]
Segment Reporting Information [Line Items]
Assets	409,501	400,034
Operating Segments [Member] | Southeastern PA [Member] | North America [Member]
Segment Reporting Information [Line Items]
Assets	448,523	698,163
Operating Segments [Member] | Tampa [Member] | North America [Member]
Segment Reporting Information [Line Items]
Assets	326,670	335,652
Operating Segments [Member] | United Kingdom [Member] | UNITED KINGDOM
Segment Reporting Information [Line Items]
Assets	215,850	231,271
Operating Segments [Member] | Other Segments [Member] | North America [Member]
Segment Reporting Information [Line Items]
Assets	1,586,481	1,553,250
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Assets	$ 64,453	$ 92,775

Segment Information - Real Esta

Segment Information - Real Estate Assets by Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Real estate assets	$ 5,865,562	$ 5,892,429
North America [Member] | Operating Segments [Member] | Carolinas [Member]
Segment Reporting Information [Line Items]
Real estate assets	322,707	309,822
North America [Member] | Operating Segments [Member] | Chicago Milwaukee [Member]
Segment Reporting Information [Line Items]
Real estate assets	387,182	383,494
North America [Member] | Operating Segments [Member] | Houston [Member]
Segment Reporting Information [Line Items]
Real estate assets	483,432	398,080
North America [Member] | Operating Segments [Member] | Lehigh Central PA [Member]
Segment Reporting Information [Line Items]
Real estate assets	1,096,195	958,886
North America [Member] | Operating Segments [Member] | Minnesota [Member]
Segment Reporting Information [Line Items]
Real estate assets	322,627	302,830
North America [Member] | Operating Segments [Member] | Orlando [Member]
Segment Reporting Information [Line Items]
Real estate assets	119,356	139,218
North America [Member] | Operating Segments [Member] | Philadelphia [Member]
Segment Reporting Information [Line Items]
Real estate assets	282,159	255,313
North America [Member] | Operating Segments [Member] | Richmond Hampton Roads [Member]
Segment Reporting Information [Line Items]
Real estate assets	123,641	238,670
North America [Member] | Operating Segments [Member] | South Florida [Member]
Segment Reporting Information [Line Items]
Real estate assets	389,534	378,398
North America [Member] | Operating Segments [Member] | Southeastern PA [Member]
Segment Reporting Information [Line Items]
Real estate assets	410,195	636,280
North America [Member] | Operating Segments [Member] | Tampa [Member]
Segment Reporting Information [Line Items]
Real estate assets	306,822	317,106
North America [Member] | Operating Segments [Member] | Other Segments [Member]
Segment Reporting Information [Line Items]
Real estate assets	1,447,322	1,391,744
UNITED KINGDOM | Operating Segments [Member] | United Kingdom [Member]
Segment Reporting Information [Line Items]
Real estate assets	$ 174,390	$ 182,588

Segment Information - Costs Inc

Segment Information - Costs Incurred on Long-lived Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	$ 573,052	$ 615,487	$ 1,895,449
Operating Segments [Member] | North America [Member] | Carolinas [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	21,993	72,252	15,582
Operating Segments [Member] | North America [Member] | Chicago Milwaukee [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	13,483	21,698	248,640
Operating Segments [Member] | North America [Member] | Houston [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	96,681	70,903	116,024
Operating Segments [Member] | North America [Member] | Lehigh Central PA [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	165,319	105,725	161,925
Operating Segments [Member] | North America [Member] | Minnesota [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	41,259	28,966	38,434
Operating Segments [Member] | North America [Member] | Orlando [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	5,344	7,827	10,953
Operating Segments [Member] | North America [Member] | Philadelphia [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	34,122	32,012	17,941
Operating Segments [Member] | North America [Member] | Richmond Hampton Roads [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	9,182	10,348	15,880
Operating Segments [Member] | North America [Member] | South Florida [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	34,089	30,063	148,165
Operating Segments [Member] | North America [Member] | Southeastern PA [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	9,047	39,638	39,590
Operating Segments [Member] | North America [Member] | Tampa [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	4,161	7,262	28,655
Operating Segments [Member] | North America [Member] | Other Segments [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	125,412	172,495	897,831
Operating Segments [Member] | UNITED KINGDOM | United Kingdom [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	$ 12,960	$ 16,298	$ 155,829

Accounting for the Impairmen111

Accounting for the Impairment or Disposal of Long-Lived Assets - Discontinued Operations (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015USD ($)	Sep. 30, 2015USD ($)	Jun. 30, 2015USD ($)	Mar. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Sep. 30, 2014USD ($)	Jun. 30, 2014USD ($)	Mar. 31, 2014USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)	Jan. 01, 2014USD ($)aft²bldg	Dec. 01, 2013USD ($)aft²bldg	Nov. 01, 2013USD ($)aft²bldg
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Abstract]
Gain on property dispositions									$ 0	$ 46,631	$ 95,384
Income from discontinued operations	$ 0	$ 0	$ 0	$ 0	$ 306	$ 133	$ 296	$ 47,846	0	48,581	121,839
Discontinued Operations [Member]
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Abstract]
Revenues									0	4,728	113,586
Operating expenses									0	(2,258)	(41,875)
Interest and other income									0	37	213
Interest expense									0	(557)	(15,903)
Depreciation and amortization									0	0	(29,566)
Income before property dispositions									0	1,950	26,455
Gain on property dispositions									0	46,631	95,384
Income from discontinued operations									$ 0	$ 48,581	121,839
Building and Building Improvements [Member] | Maryland [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Leaseable square feet (unaudited) | ft²												1,400,000
Building and Building Improvements [Member] | New Jersey [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings | bldg												24
Building and Building Improvements [Member] | Southeastern PA [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Leaseable square feet (unaudited) | ft²												37,000
Land and Land Improvements [Member] | Maryland [Member] | Not Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Acres of developable land (unaudited) | a												19
Portfolio Sale, Total [Member] | Land, Buildings and Improvements [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales proceeds														$ 697,300
Portfolio Sale, Total [Member] | Building and Building Improvements [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings | bldg														97
Leaseable square feet (unaudited) | ft²														6,600,000
Portfolio Sale, Total [Member] | Land and Land Improvements [Member] | Not Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Acres of developable land (unaudited) | a														159
Portfolio Sale, first settlement [Member] | Land, Buildings and Improvements [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Real Estate Settlements													2
Sales proceeds													$ 367,700
Portfolio Sale, first settlement [Member] | Building and Building Improvements [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings | bldg													49
Leaseable square feet (unaudited) | ft²													4,000,000
Portfolio Sale, first settlement [Member] | Land and Land Improvements [Member] | Not Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Acres of developable land (unaudited) | a													140
Portfolio Sale, Second Settlement [Member] | Land, Buildings and Improvements [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales proceeds												$ 329,600
Portfolio Sale, Second Settlement [Member] | Building and Building Improvements [Member] | Maryland [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings | bldg												23
Portfolio Sale, Second Settlement [Member] | Building and Building Improvements [Member] | New Jersey [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Leaseable square feet (unaudited) | ft²												1,200,000
Portfolio Sale, Second Settlement [Member] | Building and Building Improvements [Member] | Southeastern PA [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings | bldg												1
Other Properties [Member] | Building and Building Improvements [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales proceeds											$ 136,700

Accounting for the Impairmen112

Accounting for the Impairment or Disposal of Long-Lived Assets - Assets Held for Sale (Details) - Not Discontinued Operations [Member] - Minnesota [Member]	Dec. 31, 2015ft²bldg
Long Lived Assets Held-for-sale [Line Items]
Number of buildings | bldg	1
Leaseable square feet (unaudited) | ft²	92,000

Accounting for the Impairmen113

Accounting for the Impairment or Disposal of Long-Lived Assets - Asset Impairments in Reportable Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Asset Impairment Charges	$ 18,244	$ 117	$ 1,120
Tangible Asset Impairment Charges [Abstract]
Impairment - real estate assets	18,244	117	248
Impairments in discontinued operations			900
Richmond Hampton Roads [Member]
Segment Reporting Information [Line Items]
Asset Impairment Charges	13,755	0	$ 0
Southeastern PA [Member]
Segment Reporting Information [Line Items]
Asset Impairment Charges	2,328	106
Tampa [Member]
Segment Reporting Information [Line Items]
Asset Impairment Charges	0	0	$ 248
United Kingdom [Member]
Segment Reporting Information [Line Items]
Asset Impairment Charges	0	0	0
Other Segments [Member]
Segment Reporting Information [Line Items]
Asset Impairment Charges	$ 2,161	$ 11	$ 872

Business Combination (Details)

Business Combination (Details) $ in Thousands, ft² in Millions

Oct. 08, 2013USD ($)ft²bldg

Dec. 31, 2015USD ($)

Sep. 30, 2015USD ($)

Jun. 30, 2015USD ($)

Mar. 31, 2015USD ($)

Dec. 31, 2014USD ($)

Sep. 30, 2014USD ($)

Jun. 30, 2014USD ($)

Mar. 31, 2014USD ($)

Dec. 31, 2015USD ($)shares

Dec. 31, 2014USD ($)shares

Dec. 31, 2013USD ($)shares

Sep. 27, 2013USD ($)

Business Combination, Costs Incurred or to be Incurred [Abstract]

Deferred financing costs

$ 11,917

$ 11,917

$ 11,917

$ 11,917

Debt Instrument, Face Amount

3,154,987

3,154,987

Business Acquisition, Pro Forma Information [Abstract]

Operating revenue

$ 199,382

$ 198,972

$ 203,518

$ 206,901

$ 203,685

$ 198,356

$ 192,960

$ 197,630

808,773

792,631

$ 645,930

Operating Income (Loss)

$ 257,132

$ 257,306

$ 202,799

Senior Notes [Member] | 4.40% senior unsecured note [Member]

Business Combination, Costs Incurred or to be Incurred [Abstract]

Debt Instrument, Face Amount

$ 450,000

Common Stock [Member]

Business Combination, Costs Incurred or to be Incurred [Abstract]

Number of common shares issued | shares

1,328,017

1,957,378

27,968,740

Cabot Industrial Value Fund III [Member]

Business Combination, Description [Abstract]

Name of Acquired Entity

Cabot Industrial Fund III Operating Partnership, L.P.

Percentage of Voting Interests Acquired

100.00%

Leaseable square feet (unaudited) | ft²

23

Business Acquisition, Date of Acquisition [Abstract]

Date of Acquisition

Oct. 8, 2013

Business Combination, Consideration Transferred [Abstract]

Total purchase price of acquisition

$ 1,469,000

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]

Land and land improvements

247,393

Building and improvements

1,152,717

Operating real estate

1,400,110

Intangible - in-place leases/market rent

97,396

Other assets

4,953

Total assets

1,502,459

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]

Mortgage loans

243,230

Other liabilities

32,958

Intangible market rent

5,737

Total liabilities

281,925

Net assets acquired

1,220,534

Business Combination, Costs Incurred or to be Incurred [Abstract]

Acquisition costs

$ 7,600

Financing fees

4,200

Deferred financing costs

2,000

Mortgage loans acquired before fair value adjustment

229,800

Stock issuance costs

35,300

Business Acquisition, Pro Forma Information [Abstract]

Total operating revenue

750,896

Net income available to common shareholders

211,601

Operating revenue

31,400

Operating Income (Loss)

$ 22,000

Cabot Industrial Value Fund III [Member] | Mortgages [Member]

Business Combination, Consideration Transferred [Abstract]

Assumption of mortgage debt from acquisition

$ 229,800

Cabot Industrial Value Fund III [Member] | Senior Notes [Member] | 4.40% senior unsecured note [Member]

Business Combination, Costs Incurred or to be Incurred [Abstract]

Deferred financing costs

$ 3,900

Cabot Industrial Value Fund III [Member] | Common Stock [Member]

Business Combination, Costs Incurred or to be Incurred [Abstract]

Number of common shares issued | shares

24,200,000

Cabot Industrial Value Fund III [Member] | Leases, Acquired-in-Place [Member]

Acquired Finite-Lived Intangible Assets [Abstract]

Weighted average useful life of acquired of in-place lease intangible assets

4 years 5 months

Industrial Property [Member] | Cabot Industrial Value Fund III [Member]

Business Combination, Description [Abstract]

Number of buildings | bldg

177

Derivative Instruments (Details

Derivative Instruments (Details)	1 Months Ended		12 Months Ended
	Dec. 30, 2013USD ($)	Nov. 21, 2013USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Interest Rate Derivatives [Abstract]
Number of interest rate swaps			3
Aggregate notional amount			$ 101,400,000	$ 103,600,000
Change in fair value of interest rate swaps in earnings before cash flow hedge designation		$ 813,000
Termination value of interest rate swap, including accrued interest			7,200,000
Interest Rate Cash Flow Hedges [Abstract]
Fair value of swaps in other liabilities			7,100,000	8,500,000
Amount to be reclassified from accumulated other comprehensive income to increase interest expense over next twelve months			900,000
Interest Rate Swap [Member] | Other Comprehensive Income (Loss) [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Interest Rate Cash Flow Hedges [Abstract]
Amount of (loss) gain related to the effective portion recognized in other comprehensive (loss) income	$ 1,600,000		(1,884,000)	(3,400,000)
Interest Rate Swap [Member] | Interest Expense [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Interest Rate Cash Flow Hedges [Abstract]
Amount of loss related to the effective portion reclassified to interest expense	0		(1,396,000)	(1,500,000)
Amount of (loss) gain related to the ineffective portion recognized in interest expense	$ 266,000		$ (91,000)	$ (82,000)

Supplemental Disclosure to S116

Supplemental Disclosure to Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Supplemental Disclosure to Statements of Cash Flows [Abstract]
Write-off of fully depreciated/amortized property and deferred costs	$ 42,339	$ 38,131	$ 22,269
Write-off of depreciated property and deferred costs due to sale/demolition	252,017	173,083	202,695
Write-off of preferred units costs due to redemption	0	0	1,214
Assumption of mortgage loans in connection with the acquisition of properties	0	0	229,751
Increase in investments in and advances to unconsolidated joint ventures due to disposition/development activity	0	(11,948)	0
Changes in accrued development capital expenditures	11,964	6,264	17,053
Unrealized (loss) gain on cash flow hedge	$ (488)	$ (3,419)	$ 1,584

Subsequent Events (Details)

Subsequent Events (Details) - Common shares [Member] - USD ($) $ in Millions	2 Months Ended	12 Months Ended
	Feb. 26, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Subsequent Event [Line Items]
Share repurchase, shares		2,321,794	0	0
2015 Share Repurchase Program [Member]
Subsequent Event [Line Items]
Share repurchase, shares		2,300,000
Share repurchase, value		$ 71.8
2015 Share Repurchase Program [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Share repurchase, shares	1,400,000
Share repurchase, value	$ 40.9

Schedule II (Details)

Schedule II (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of the Year	$ 7,400	$ 7,761	$ 7,014
Additions	5,479	4,983	3,320
Deductions	(5,981)	(5,344)	(2,573)
Balance at End of the Year	6,898	7,400	7,761
Allowance for Trade Receivable, Straight Line Rent [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of the Year	910	823	798
Additions	1,233	1,097	815
Deductions	(1,562)	(1,010)	(790)
Balance at End of the Year	581	910	823
Allowance for Trade Receivables [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of the Year	6,490	6,938	6,216
Additions	4,246	3,886	2,505
Deductions	(4,419)	(4,334)	(1,783)
Balance at End of the Year	$ 6,317	$ 6,490	$ 6,938

Schedule III (Details)

Schedule III (Details) - USD ($)		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,074,558,000	$ 6,704,262,000	$ 5,369,861,000	$ 7,014,490,000
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,182,129,000	1,051,340,000	1,067,205,000	1,148,928,000
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,074,558,000	6,704,262,000	5,369,861,000
Real Estate Additions		562,299,000	602,585,000	1,888,229,000
Real Estate, Cost of Real Estate Sold		(622,367,000)	(232,289,000)	(553,828,000)
Real Estate, Gross		7,014,490,000	7,074,558,000	6,704,262,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		1,182,129,000	1,051,340,000	1,067,205,000
Real Estate Accumulated Depreciation, Depreciation Expense		182,011,000	179,143,000	162,546,000
Real Estate Accumulated Depreciation, Real Estate Sold		(215,212,000)	(48,354,000)	(178,411,000)
Real Estate Accumulated Depreciation		1,148,928,000	$ 1,182,129,000	$ 1,051,340,000
Allianz, John Hancock, LaSalle Bank, Athene, New York Life and Wells Fargo [Member] [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances					232,100,000
Total Real Estate [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[1]				55,484,649
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,501,956,884
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,652,302,317
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,844,417,302
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,521,894,052
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,492,595,513
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		7,014,489,565			7,014,489,565
Real Estate and Accumulated Depreciation, Accumulated Depreciation		1,148,928,324			1,148,928,324
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		7,014,489,565
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,148,928,324
Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | 627 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Morrisville, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,061,370
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,152,110
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				596,652
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,061,632
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,748,500
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,810,132			6,810,132
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,475,427			1,475,427
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,810,132
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,475,427
Operating Properties [Member] | 1467 Perryman Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Aberdeen, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					12,052,635
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				35,346,705
Real Estate and Accumulated Depreciation, Carrying Amount of Land					12,334,030
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					35,065,310
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 47,399,340			47,399,340
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,369,265			1,369,265
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 47,399,340
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,369,265
Operating Properties [Member] | 1501 Perryman Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Aberdeen, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					5,813,324
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					18,874,059
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,422,539
Real Estate and Accumulated Depreciation, Carrying Amount of Land					5,816,839
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					24,293,083
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 30,109,922			30,109,922
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 5,910,950			5,910,950
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 30,109,922
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 5,910,950
Operating Properties [Member] | 869 S Route 53 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Addison, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,194,223
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,201,881
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				61,258
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,194,223
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,263,140
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,457,363			5,457,363
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 297,229			297,229
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,457,363
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 297,229
Operating Properties [Member] | 901 S Route 53 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Addison, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,055,066
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,984,093
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				661,947
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,055,066
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,646,040
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,701,106			8,701,106
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 431,780			431,780
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,701,106
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 431,780
Operating Properties [Member] | 200 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,722,683
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					18,922,645
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				902,672
Real Estate and Accumulated Depreciation, Carrying Amount of Land					4,722,683
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					19,825,317
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 24,548,000			24,548,000
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 5,621,980			5,621,980
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 24,548,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 5,621,980
Operating Properties [Member] | 250 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,599,936
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					12,099,145
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,149,322
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,717,733
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					14,130,670
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 17,848,403			17,848,403
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 4,657,632			4,657,632
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 17,848,403
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 4,657,632
Operating Properties [Member] | 400 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					8,065,500
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				27,960,348
Real Estate and Accumulated Depreciation, Carrying Amount of Land					8,184,096
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					27,841,752
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 36,025,848			36,025,848
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 14,183,487			14,183,487
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 36,025,848
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 14,183,487
Operating Properties [Member] | 650 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					5,208,248
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				32,159,603
Real Estate and Accumulated Depreciation, Carrying Amount of Land					9,961,788
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					27,406,063
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 37,367,851			37,367,851
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 9,049,776			9,049,776
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 37,367,851
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 9,049,776
Operating Properties [Member] | 651 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,308,646
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				17,738,622
Real Estate and Accumulated Depreciation, Carrying Amount of Land					4,308,646
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					17,738,622
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 22,047,268			22,047,268
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 8,117,529			8,117,529
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 22,047,268
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 8,117,529
Operating Properties [Member] | 700 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,473,120
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				20,186,320
Real Estate and Accumulated Depreciation, Carrying Amount of Land					4,174,970
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					19,484,470
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 23,659,440			23,659,440
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 10,049,517			10,049,517
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 23,659,440
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 10,049,517
Operating Properties [Member] | 705 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					10,594,027
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				28,652,353
Real Estate and Accumulated Depreciation, Carrying Amount of Land					10,596,767
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					28,649,613
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 39,246,380			39,246,380
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 12,616,449			12,616,449
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 39,246,380
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 12,616,449
Operating Properties [Member] | 7165 Ambassador Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					792,999
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,644,609
Real Estate and Accumulated Depreciation, Carrying Amount of Land					804,848
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,632,760
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,437,608			5,437,608
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,884,477			1,884,477
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,437,608
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,884,477
Operating Properties [Member] | 7248 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,670,849
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					13,307,408
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,712,185
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,670,673
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					18,019,769
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 20,690,442			20,690,442
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 8,443,302			8,443,302
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 20,690,442
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 8,443,302
Operating Properties [Member] | 7339 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,187,776
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				7,592,257
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,197,447
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,582,586
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,780,033			8,780,033
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,650,841			3,650,841
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,780,033
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,650,841
Operating Properties [Member] | 7437 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					717,488
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,022,413
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,377,718
Real Estate and Accumulated Depreciation, Carrying Amount of Land					726,651
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					8,390,967
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 9,117,618			9,117,618
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 4,969,096			4,969,096
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,976
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 9,117,618
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 4,969,096
Operating Properties [Member] | 8014 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,019,258
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				9,909,602
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,645,117
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,283,743
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 13,928,860			13,928,860
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 4,893,825			4,893,825
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 13,928,860
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 4,893,825
Operating Properties [Member] | 8150 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,564,167
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				9,396,095
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,571,466
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					9,388,796
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 11,960,262			11,960,262
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,148,626			3,148,626
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 11,960,262
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,148,626
Operating Properties [Member] | 8250 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,025,667
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,082,558
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,035,854
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,072,371
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,108,225			6,108,225
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,696,937			1,696,937
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,108,225
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,696,937
Operating Properties [Member] | 8400 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					6,725,948
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				27,161,555
Real Estate and Accumulated Depreciation, Carrying Amount of Land					7,521,211
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					26,366,292
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 33,887,503			33,887,503
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 6,758,180			6,758,180
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 33,887,503
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 6,758,180
Operating Properties [Member] | 6330 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					531,268
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				6,060,145
Real Estate and Accumulated Depreciation, Carrying Amount of Land					532,047
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,059,366
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,591,413			6,591,413
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,620,745			3,620,745
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,591,413
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,620,745
Operating Properties [Member] | 6350 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					360,027
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,526,060
Real Estate and Accumulated Depreciation, Carrying Amount of Land					560,691
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,325,396
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,886,087			4,886,087
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,309,215			2,309,215
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,886,087
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,309,215
Operating Properties [Member] | 6370 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					540,795
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,019,260
Real Estate and Accumulated Depreciation, Carrying Amount of Land					541,459
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,018,596
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,560,055			4,560,055
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,279,429			2,279,429
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,560,055
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,279,429
Operating Properties [Member] | 6390 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					707,203
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,018,919
Real Estate and Accumulated Depreciation, Carrying Amount of Land					707,867
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,018,255
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,726,122			3,726,122
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,813,455			1,813,455
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,726,122
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,813,455
Operating Properties [Member] | 6520 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					453,315
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,873,771
Real Estate and Accumulated Depreciation, Carrying Amount of Land					484,361
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,842,725
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,327,086			2,327,086
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 992,068			992,068
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,327,086
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 992,068
Operating Properties [Member] | 6540 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					422,042
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,073,406
Real Estate and Accumulated Depreciation, Carrying Amount of Land					422,730
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,072,718
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,495,448			4,495,448
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,759,797			2,759,797
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,495,448
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,759,797
Operating Properties [Member] | 6560 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					458,281
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,858,752
Real Estate and Accumulated Depreciation, Carrying Amount of Land					458,945
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,858,088
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,317,033			3,317,033
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,969,167			1,969,167
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,317,033
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,969,167
Operating Properties [Member] | 6580 Snowdrift Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					388,328
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,876,767
Real Estate and Accumulated Depreciation, Carrying Amount of Land					389,081
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,876,014
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,265,095			5,265,095
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,828,651			2,828,651
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,265,095
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,828,651
Operating Properties [Member] | 7620 Cetronia Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,091,806
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,851,456
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				445,980
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,093,724
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,295,518
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,389,242			5,389,242
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,148,035			2,148,035
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,389,242
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,148,035
Operating Properties [Member] | 3095 Presidential Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Atlanta, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					200,351
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,729,161
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				216,941
Real Estate and Accumulated Depreciation, Carrying Amount of Land					200,351
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,946,102
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,146,453			2,146,453
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 148,824			148,824
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,146,453
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 148,824
Operating Properties [Member] | 3097 Presidential Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Atlanta, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					188,680
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,721,048
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				86,553
Real Estate and Accumulated Depreciation, Carrying Amount of Land					188,680
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,807,601
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,996,281			1,996,281
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 148,512			148,512
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,996,281
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 148,512
Operating Properties [Member] | 7030 Buford Highway NE [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Atlanta, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					919,850
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,051,340
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				940,852
Real Estate and Accumulated Depreciation, Carrying Amount of Land					919,850
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,992,192
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,912,042			5,912,042
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 428,292			428,292
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,912,042
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 428,292
Operating Properties [Member] | Barton 150 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Barton Under Needwood, UK
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,196,955
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					13,643,981
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				(1,742,245)
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,955,326
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					12,143,365
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 14,098,691			14,098,691
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 786,014			786,014
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 14,098,691
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 786,014
Operating Properties [Member] | 1055-1071 Kingsland Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Batavia, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					727,294
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,367,529
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				326,403
Real Estate and Accumulated Depreciation, Carrying Amount of Land					727,294
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,693,932
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,421,226			3,421,226
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 235,638			235,638
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,421,226
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 235,638
Operating Properties [Member] | 4606 Richlynn Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Belcamp, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					299,600
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,818,861
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				712,788
Real Estate and Accumulated Depreciation, Carrying Amount of Land					299,600
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,531,649
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,831,249			2,831,249
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,041,001			1,041,001
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,831,249
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,041,001
Operating Properties [Member] | 11800 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Beltsville,MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,769,962
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,829,028
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				373,362
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,769,962
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,202,391
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,972,353			4,972,353
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 208,719			208,719
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,972,353
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 208,719
Operating Properties [Member] | 11850 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Beltsville,MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,595,044
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,415,132
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				277,582
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,595,044
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,692,714
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,287,758			6,287,758
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 333,699			333,699
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,287,758
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 333,699
Operating Properties [Member] | 11900 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Beltsville,MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,492,036
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,024,038
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				480,354
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,492,036
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,504,392
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,996,428			5,996,428
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 358,357			358,357
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,996,428
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 358,357
Operating Properties [Member] | 12104 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Beltsville,MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,021,752
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,503,802
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				391,474
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,021,752
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,895,276
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,917,028			4,917,028
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 397,647			397,647
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,917,028
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 397,647
Operating Properties [Member] | 12200 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Beltsville,MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,347,882
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,460,291
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				612,557
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,347,882
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,072,848
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,420,730			3,420,730
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 157,679			157,679
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,420,730
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 157,679
Operating Properties [Member] | 12240 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Beltsville,MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,479,307
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,159,997
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				552,121
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,479,307
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,712,119
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,191,426			4,191,426
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 211,434			211,434
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,191,426
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 211,434
Operating Properties [Member] | 1071 Thorndale Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Bensenville,IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,173,006
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,280,788
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				174,978
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,016,715
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,612,057
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,628,772			4,628,772
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 247,640			247,640
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,628,772
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 247,640
Operating Properties [Member] | 1260-1274 Ellis Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Bensenville,IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,298,560
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,020,382
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				360,126
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,298,560
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,380,508
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,679,068			6,679,068
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 403,950			403,950
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,679,068
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 403,950
Operating Properties [Member] | 371-377 Meyer Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Bensenville,IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,903,423
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,563,953
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				301,673
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,903,423
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,865,626
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,769,049			5,769,049
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 360,978			360,978
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,769,049
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 360,978
Operating Properties [Member] | 850-880 Devon Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Bensenville,IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,958,756
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					7,959,013
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				693,361
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,958,756
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					8,652,374
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 11,611,130			11,611,130
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 709,605			709,605
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 11,611,130
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 709,605
Operating Properties [Member] | 10 Emery Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Bethlehem, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					5,591,216
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					32,941,818
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				7,229,427
Real Estate and Accumulated Depreciation, Carrying Amount of Land					8,945,327
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					36,817,134
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 45,762,461			45,762,461
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,410,917			1,410,917
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 45,762,461
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,410,917
Operating Properties [Member] | 2785 Commerce Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Bethlehem, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					11,961,623
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				46,707,077
Real Estate and Accumulated Depreciation, Carrying Amount of Land					12,009,985
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					46,658,715
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 58,668,700			58,668,700
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,031,218			3,031,218
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 58,668,700
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,031,218
Operating Properties [Member] | 74 West Broad Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Bethlehem, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,096,127
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				14,540,256
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,099,079
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					14,537,304
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 15,636,383			15,636,383
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 6,410,073			6,410,073
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 15,636,383
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 6,410,073
Operating Properties [Member] | 10801 Nesbitt Avenue South [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Bloomington, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					784,577
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,010,219
Real Estate and Accumulated Depreciation, Carrying Amount of Land					786,382
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,008,414
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,794,796			5,794,796
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,851,425			1,851,425
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,794,796
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,851,425
Operating Properties [Member] | 5705 Old Shakopee Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Bloomington, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,113,223
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				6,276,164
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,148,571
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,240,816
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,389,387			8,389,387
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,115,865			2,115,865
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,389,387
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,115,865
Operating Properties [Member] | 5715 Old Shakopee Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Bloomington, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,263,226
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,360,782
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,316,756
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,264,758
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,676,006
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,940,764			5,940,764
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,939,380			1,939,380
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,940,764
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,939,380
Operating Properties [Member] | 5735 Old Shakopee Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Bloomington, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,263,226
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,360,782
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,006,356
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,264,758
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,365,606
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,630,364			4,630,364
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,105,007			1,105,007
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,630,364
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,105,007
Operating Properties [Member] | 5775 West Old Shakopee Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Bloomington, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,052,018
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,849,649
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,676,375
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,060,644
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,517,398
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,578,042			7,578,042
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,251,291			2,251,291
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,578,042
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,251,291
Operating Properties [Member] | 6161 Green Valley Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Bloomington, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					740,378
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,311,602
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,680,574
Real Estate and Accumulated Depreciation, Carrying Amount of Land					709,961
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,022,593
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,732,554			5,732,554
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,271,251			2,271,251
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,992
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,732,554
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,271,251
Operating Properties [Member] | 6601-6625 W. 78th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Bloomington, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,263,060
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				42,098,480
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,310,246
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					42,051,294
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 44,361,540			44,361,540
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 17,834,890			17,834,890
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 44,361,540
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 17,834,890
Operating Properties [Member] | 750 Park of Commerce Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Boca Raton, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,430,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				22,337,738
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,473,406
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					22,294,332
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 24,767,738			24,767,738
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,985,949			3,985,949
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 24,767,738
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,985,949
Operating Properties [Member] | 777 Yamato Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Boca Raton, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,101,247
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					16,077,347
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,344,482
Real Estate and Accumulated Depreciation, Carrying Amount of Land					4,501,247
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					21,021,829
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 25,523,076			25,523,076
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 8,875,993			8,875,993
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,987
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 25,523,076
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 8,875,993
Operating Properties [Member] | 951 Broken Sound Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Boca Raton, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,426,251
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,098,952
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,001,056
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,426,251
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					8,100,008
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 9,526,259			9,526,259
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,964,177			3,964,177
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,986
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 9,526,259
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,964,177
Operating Properties [Member] | 1455 Remington Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Bolingbrook, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,501,294
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					10,704,719
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,170
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,501,294
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,705,889
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 13,207,183			13,207,183
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 879,209			879,209
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 13,207,183
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 879,209
Operating Properties [Member] | 150 E Crossroads Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Bolingbrook, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,078,949
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					14,143,377
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,124,578
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,078,949
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					15,267,955
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 18,346,904			18,346,904
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,166,216			1,166,216
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 18,346,904
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,166,216
Operating Properties [Member] | 553 S Joliet Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Bolingbrook, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,764,831
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					15,109,947
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,296,625
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,764,831
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					16,406,572
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 20,171,403			20,171,403
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,508,882			1,508,882
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 20,171,403
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,508,882
Operating Properties [Member] | 400 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Breinigsville, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,859,106
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				10,599,615
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,865,575
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,593,146
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 13,458,721			13,458,721
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,094,910			3,094,910
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 13,458,721
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,094,910
Operating Properties [Member] | 8201 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Breinigsville, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,089,719
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				8,353,910
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,222,168
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					8,221,461
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 10,443,629			10,443,629
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,038,762			2,038,762
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 10,443,629
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,038,762
Operating Properties [Member] | 8500 Industrial Bouldvard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Breinigsville, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					8,752,708
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				39,866,096
Real Estate and Accumulated Depreciation, Carrying Amount of Land					11,511,499
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					37,107,305
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 48,618,804			48,618,804
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 9,089,031			9,089,031
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 48,618,804
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 9,089,031
Operating Properties [Member] | 860 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Breinigsville, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					8,118,881
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					18,885,486
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				7,417,175
Real Estate and Accumulated Depreciation, Carrying Amount of Land					8,118,881
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					26,302,661
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 34,421,542			34,421,542
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 8,792,764			8,792,764
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 34,421,542
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 8,792,764
Operating Properties [Member] | 1485 W Commerce Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Carlisle, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,249,868
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					13,886,039
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,344,063
Real Estate and Accumulated Depreciation, Carrying Amount of Land					4,095,262
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					16,384,708
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 20,479,970			20,479,970
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 6,043,883			6,043,883
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 20,479,970
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 6,043,883
Operating Properties [Member] | 40 Logistics Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Carlisle, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					7,981,850
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				33,008,825
Real Estate and Accumulated Depreciation, Carrying Amount of Land					8,081,272
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					32,909,403
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 40,990,675			40,990,675
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,013,072			3,013,072
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 40,990,675
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,013,072
Operating Properties [Member] | 135-195 East Elk Trail [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Carol Stream, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,873,094
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					12,430,320
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				594,561
Real Estate and Accumulated Depreciation, Carrying Amount of Land					4,873,094
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					13,024,881
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 17,897,975			17,897,975
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 694,475			694,475
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 17,897,975
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 694,475
Operating Properties [Member] | 515 Kehoe Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Carol Stream, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					5,523,427
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					14,581,705
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				203,950
Real Estate and Accumulated Depreciation, Carrying Amount of Land					5,523,427
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					14,785,655
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 20,309,082			20,309,082
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 943,841			943,841
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 20,309,082
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 943,841
Operating Properties [Member] | 1413 Bradley Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Carrollton, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					247,477
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,028,322
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				83,523
Real Estate and Accumulated Depreciation, Carrying Amount of Land					247,477
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,111,845
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,359,322			2,359,322
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 176,999			176,999
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,359,322
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 176,999
Operating Properties [Member] | 3200 Belmeade Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Carrollton, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,042,453
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					8,027,974
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				414,235
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,042,453
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					8,442,209
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 9,484,662			9,484,662
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 634,295			634,295
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 9,484,662
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 634,295
Operating Properties [Member] | 1475 Nitterhouse Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Chambersburg, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					7,081,007
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					39,002,011
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,091,556
Real Estate and Accumulated Depreciation, Carrying Amount of Land					7,081,007
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					41,093,567
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 48,174,574			48,174,574
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,258,216			3,258,216
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 48,174,574
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,258,216
Operating Properties [Member] | 95 Kriner Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Chambersburg, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					8,695,501
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				34,926,589
Real Estate and Accumulated Depreciation, Carrying Amount of Land					9,407,871
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					34,214,219
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 43,622,090			43,622,090
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 6,917,933			6,917,933
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 43,622,090
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 6,917,933
Operating Properties [Member] | 9000 109th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Champlain, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,251,043
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					11,662,995
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				119,919
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,251,043
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					11,782,914
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 13,033,957			13,033,957
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,473,425			1,473,425
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 13,033,957
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,473,425
Operating Properties [Member] | 11701 Goodrich Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,054,621
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,356,151
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				817,623
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,054,621
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,173,773
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 9,228,394			9,228,394
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,015,254			1,015,254
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 9,228,394
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,015,254
Operating Properties [Member] | 12810 Virkler Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					475,368
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,367,586
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				738,197
Real Estate and Accumulated Depreciation, Carrying Amount of Land					476,262
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,104,888
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,581,150			3,581,150
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 380,450			380,450
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,010
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,581,150
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 380,450
Operating Properties [Member] | 2700 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					912,500
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,721,259
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				309,842
Real Estate and Accumulated Depreciation, Carrying Amount of Land					912,500
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,031,101
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,943,601			5,943,601
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 613,658			613,658
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,943,601
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 613,658
Operating Properties [Member] | 2701 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,275,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,649,750
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				630,260
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,275,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,280,010
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,555,010			6,555,010
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 666,561			666,561
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,555,010
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 666,561
Operating Properties [Member] | 2730 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,878,750
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					10,129,499
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				43,022
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,878,750
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,172,521
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 12,051,271			12,051,271
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,162,053			1,162,053
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 12,051,271
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,162,053
Operating Properties [Member] | 2801 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,065,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,975,250
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				213,916
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,065,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,189,166
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,254,166			8,254,166
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 872,805			872,805
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,254,166
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 872,805
Operating Properties [Member] | 3000 Crosspoint Center Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,831,250
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					10,779,412
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,032,234
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,831,250
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					11,811,646
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 13,642,896			13,642,896
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,371,005			1,371,005
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 13,642,896
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,371,005
Operating Properties [Member] | 3005 Crosspoint Center Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,990,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,561,540
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				665,107
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,990,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,226,647
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 9,216,647			9,216,647
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 780,369			780,369
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 9,216,647
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 780,369
Operating Properties [Member] | 4045 Perimeter West Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,418,928
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					7,511,050
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				(52,318)
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,418,928
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,458,732
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,877,660			8,877,660
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 970,146			970,146
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,877,660
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 970,146
Operating Properties [Member] | 4047 Perimeter West Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,279,004
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				6,399,096
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,279,004
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,399,096
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,678,100			7,678,100
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 688,283			688,283
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,678,100
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 688,283
Operating Properties [Member] | 4525 Statesville Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					841,250
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,279,315
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				316,750
Real Estate and Accumulated Depreciation, Carrying Amount of Land					837,144
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,600,171
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,437,315			6,437,315
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 654,702			654,702
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,437,315
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 654,702
Operating Properties [Member] | 4835 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[1]				3,210,583
Real Estate and Accumulated Depreciation, Initial Cost of Land					690,750
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,086,388
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				102,104
Real Estate and Accumulated Depreciation, Carrying Amount of Land					690,750
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,188,492
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,879,242			5,879,242
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 474,733			474,733
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,879,242
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 474,733
Operating Properties [Member] | 4925 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[1]				3,238,688
Real Estate and Accumulated Depreciation, Initial Cost of Land					603,003
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,969,011
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				107,476
Real Estate and Accumulated Depreciation, Carrying Amount of Land					603,003
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,076,487
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,679,490			5,679,490
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 544,133			544,133
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,679,490
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 544,133
Operating Properties [Member] | 5033 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[1]				2,622,886
Real Estate and Accumulated Depreciation, Initial Cost of Land					509,247
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,710,218
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				166,524
Real Estate and Accumulated Depreciation, Carrying Amount of Land					613,962
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,772,027
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,385,989			5,385,989
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 455,174			455,174
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,385,989
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 455,174
Operating Properties [Member] | 5039 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,027,500
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,172,807
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				23,107
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,027,500
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,195,914
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,223,414			7,223,414
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 197,115			197,115
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,223,414
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 197,115
Operating Properties [Member] | 8910 Pioneer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					527,873
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,959,206
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				(21,446)
Real Estate and Accumulated Depreciation, Carrying Amount of Land					527,873
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,937,760
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,465,633			5,465,633
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 497,449			497,449
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,465,633
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 497,449
Operating Properties [Member] | 8916 Pioneer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					557,730
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,785,333
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				347,238
Real Estate and Accumulated Depreciation, Carrying Amount of Land					557,730
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,132,571
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,690,301			6,690,301
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 719,728			719,728
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,690,301
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 719,728
Operating Properties [Member] | 2601 Indian River Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Chesapeake, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,711,746
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					10,418,032
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				437,088
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,711,746
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,855,120
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 12,566,866			12,566,866
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 885,048			885,048
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 12,566,866
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 885,048
Operating Properties [Member] | 1540 S 54th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Cicero, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,540,236
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					20,130,552
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				928,916
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,540,236
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					21,059,468
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 24,599,704			24,599,704
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,581,479			1,581,479
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 24,599,704
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,581,479
Operating Properties [Member] | 4650 Lake Forest Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Cinncinnati, OH
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,030,242
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,003,024
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				233,667
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,030,242
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,236,690
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,266,932			5,266,932
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 357,652			357,652
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,266,932
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 357,652
Operating Properties [Member] | 4750 Lake Forest Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Cinncinnati, OH
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,138,166
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,914,789
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				197,670
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,138,166
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,112,459
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,250,625			7,250,625
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 523,185			523,185
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,250,625
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 523,185
Operating Properties [Member] | 9645 Gerwig Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Columbia, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,915,960
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,461,228
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				320,391
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,915,960
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,781,619
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,697,579			8,697,579
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 578,261			578,261
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,697,579
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 578,261
Operating Properties [Member] | 2550 John Glenn Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Columbus, OH
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					540,601
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,129,342
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				869,575
Real Estate and Accumulated Depreciation, Carrying Amount of Land					540,601
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,998,917
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,539,518			6,539,518
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 406,007			406,007
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,539,518
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 406,007
Operating Properties [Member] | 3800 Twin Creeks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Columbus, OH
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					549,393
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,643,302
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				491,170
Real Estate and Accumulated Depreciation, Carrying Amount of Land					549,393
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,134,472
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,683,865			5,683,865
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 362,302			362,302
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,683,865
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 362,302
Operating Properties [Member] | 330 South Royal Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Coppell, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,091,426
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				11,002,754
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,091,426
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					11,002,754
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 13,094,180			13,094,180
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 65,097			65,097
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 13,094,180
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 65,097
Operating Properties [Member] | 455 Airline Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Coppell, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					312,701
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,311,531
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				742,190
Real Estate and Accumulated Depreciation, Carrying Amount of Land					312,701
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,053,721
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,366,422			3,366,422
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 394,388			394,388
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,366,422
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 394,388
Operating Properties [Member] | 2130 Baldwin Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Crofton, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,172,032
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					7,350,782
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				418,907
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,172,032
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,769,689
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 10,941,721			10,941,721
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 626,318			626,318
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 10,941,721
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 626,318
Operating Properties [Member] | 329-333 Herrod Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Dayton, NJ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,039,559
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					20,863,051
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,285,014
Real Estate and Accumulated Depreciation, Carrying Amount of Land					4,039,559
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					23,148,065
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 27,187,624			27,187,624
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,701,158			1,701,158
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 27,187,624
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,701,158
Operating Properties [Member] | 1250 Hall Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Deer Park, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					829,570
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,778,327
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				120,899
Real Estate and Accumulated Depreciation, Carrying Amount of Land					831,611
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,897,185
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,728,796			5,728,796
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,178,012			1,178,012
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,728,796
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,178,012
Operating Properties [Member] | 301-321 S Goolsby Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Deerfield Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					498,136
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,781,180
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				184,573
Real Estate and Accumulated Depreciation, Carrying Amount of Land					498,136
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,965,753
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,463,889			3,463,889
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 197,893			197,893
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,463,889
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 197,893
Operating Properties [Member] | 1680 Executive Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Duluth, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,928,412
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,651,819
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				573,627
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,928,412
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,225,446
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,153,858			7,153,858
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 586,154			586,154
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,153,858
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 586,154
Operating Properties [Member] | 1700 Executive Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Duluth, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,082,072
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,496,599
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				458,767
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,082,072
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,955,366
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,037,438			4,037,438
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 348,680			348,680
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,037,438
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 348,680
Operating Properties [Member] | 2670 Breckinridge Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Duluth, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,676,415
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,567,592
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				568,647
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,676,415
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,136,240
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,812,655			6,812,655
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 416,765			416,765
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,812,655
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 416,765
Operating Properties [Member] | 170 Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Duncan, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					598,348
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,643,756
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				474,682
Real Estate and Accumulated Depreciation, Carrying Amount of Land					598,918
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,117,868
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,716,786			4,716,786
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,085,855			1,085,855
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,716,786
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,085,855
Operating Properties [Member] | 190 Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Duncan, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					551,663
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,310,993
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				251,300
Real Estate and Accumulated Depreciation, Carrying Amount of Land					552,211
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,561,744
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,113,955			4,113,955
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 871,587			871,587
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,113,955
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 871,587
Operating Properties [Member] | 265 Parkway East [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Duncan, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					901,444
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,751,389
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				193,199
Real Estate and Accumulated Depreciation, Carrying Amount of Land					902,374
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,943,658
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,846,032			6,846,032
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,753,633			1,753,633
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,846,032
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,753,633
Operating Properties [Member] | 285 Parkway East [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Duncan, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					975,433
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,851,990
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				360,530
Real Estate and Accumulated Depreciation, Carrying Amount of Land					976,393
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,211,560
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,187,953			7,187,953
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,558,582			1,558,582
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,187,953
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,558,582
Operating Properties [Member] | 1000 Parliament Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Durham, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,229,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					7,064,506
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				81,890
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,229,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,146,396
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 9,375,396			9,375,396
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 334,717			334,717
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 9,375,396
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 334,717
Operating Properties [Member] | 4226 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Durham, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,440,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					7,932,265
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				130,771
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,440,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					8,063,036
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 9,503,036			9,503,036
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 449,066			449,066
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 9,503,036
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 449,066
Operating Properties [Member] | 4227 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Durham, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,500,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,624,030
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				74,695
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,500,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,698,724
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,198,724			7,198,724
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 249,153			249,153
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,198,724
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 249,153
Operating Properties [Member] | 4234 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Durham, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,440,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					7,356,161
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				(4,933)
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,440,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,351,228
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,791,228			8,791,228
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 395,115			395,115
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,791,228
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 395,115
Operating Properties [Member] | 4300 Emperor Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Durham, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,576,500
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,240,961
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				114,080
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,576,500
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,355,041
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,931,541			5,931,541
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 215,916			215,916
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,931,541
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 215,916
Operating Properties [Member] | 3169 Dodd Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eagan, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					988,594
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,586,907
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,566
Real Estate and Accumulated Depreciation, Carrying Amount of Land					988,594
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,588,473
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,577,067			7,577,067
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 733,028			733,028
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,577,067
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 733,028
Operating Properties [Member] | 3711 Kennebec Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eagan, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					999,702
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,042,589
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				313,808
Real Estate and Accumulated Depreciation, Carrying Amount of Land					999,702
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,356,397
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,356,099			5,356,099
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 768,996			768,996
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,356,099
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 768,996
Operating Properties [Member] | 917 Lone Oak Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eagan, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,493,115
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,120,455
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				719,188
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,493,115
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,839,643
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,332,758			8,332,758
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 709,824			709,824
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,332,758
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 709,824
Operating Properties [Member] | 10301-10305 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					120,622
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,085,226
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				310,312
Real Estate and Accumulated Depreciation, Carrying Amount of Land					118,300
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,397,860
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,516,160			1,516,160
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 587,445			587,445
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,984
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,516,160
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 587,445
Operating Properties [Member] | 10321 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					145,198
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,305,700
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				578,495
Real Estate and Accumulated Depreciation, Carrying Amount of Land					142,399
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,886,994
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,029,393			2,029,393
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 816,454			816,454
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,984
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,029,393
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 816,454
Operating Properties [Member] | 10333 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					110,746
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					995,868
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				333,454
Real Estate and Accumulated Depreciation, Carrying Amount of Land					108,610
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,331,458
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,440,068			1,440,068
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 567,078			567,078
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,984
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,440,068
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 567,078
Operating Properties [Member] | 10349-10357 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					275,903
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,481,666
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				900,007
Real Estate and Accumulated Depreciation, Carrying Amount of Land					270,584
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,386,992
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,657,576			3,657,576
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,603,975			1,603,975
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,657,576
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,603,975
Operating Properties [Member] | 10365-10375 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					291,077
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,618,194
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,530,128
Real Estate and Accumulated Depreciation, Carrying Amount of Land					285,464
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,153,935
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,439,399			4,439,399
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,596,638			1,596,638
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,439,399
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,596,638
Operating Properties [Member] | 10393-10394 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					269,618
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,423,318
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,319,934
Real Estate and Accumulated Depreciation, Carrying Amount of Land					264,419
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,748,451
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,012,870			5,012,870
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,600,330			1,600,330
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,012,870
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,600,330
Operating Properties [Member] | 10400 Viking Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,912,391
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				23,674,446
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,938,372
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					23,648,465
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 26,586,837			26,586,837
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 10,860,957			10,860,957
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 26,586,837
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 10,860,957
Operating Properties [Member] | 7075 Flying Cloud Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					10,232,831
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					10,855,851
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,408,606
Real Estate and Accumulated Depreciation, Carrying Amount of Land					10,243,977
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					12,253,310
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 22,497,287			22,497,287
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,424,879			2,424,879
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 22,497,287
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,424,879
Operating Properties [Member] | 7078 Shady Oak Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					343,093
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,085,795
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,528,369
Real Estate and Accumulated Depreciation, Carrying Amount of Land					336,481
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,620,776
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,957,257			4,957,257
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,237,010			2,237,010
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,957,257
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,237,010
Operating Properties [Member] | 7615 Smetana Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,011,517
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				9,043,293
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,000,555
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,054,255
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 10,054,810			10,054,810
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,778,882			2,778,882
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 10,054,810
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,778,882
Operating Properties [Member] | 7625 Smetana Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,500,641
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,411,028
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,916,609
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,995,060
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,911,669			7,911,669
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,577,903			1,577,903
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,911,669
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,577,903
Operating Properties [Member] | 7695-7699 Anagram Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					760,525
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,254,758
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,204,632
Real Estate and Accumulated Depreciation, Carrying Amount of Land					760,525
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,459,390
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,219,915			5,219,915
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,315,503			2,315,503
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,219,915
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,315,503
Operating Properties [Member] | 7777 Golden Triangle Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					993,101
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,136,862
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,299,413
Real Estate and Accumulated Depreciation, Carrying Amount of Land					993,101
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,436,274
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,429,375			4,429,375
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,545,239			1,545,239
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,429,375
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,545,239
Operating Properties [Member] | 7800 Equitable Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,188,525
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,788,762
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				545,644
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,188,525
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,334,405
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,522,930			6,522,930
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,753,415			1,753,415
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,993
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,522,930
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,753,415
Operating Properties [Member] | 7905 Fuller Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,229,862
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,075,167
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,980,136
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,230,965
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,054,200
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,285,165			7,285,165
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,491,555			3,491,555
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,994
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,285,165
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,491,555
Operating Properties [Member] | 8855 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,400,925
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,199,574
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,599,757
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,000,742
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,600,499			6,600,499
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,448,477			1,448,477
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,600,499
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,448,477
Operating Properties [Member] | 8911 Columbine Road (B2) [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					916,687
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,465,073
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,718,407
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,663,353
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,381,760			5,381,760
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,135,266			1,135,266
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,381,760
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,135,266
Operating Properties [Member] | 8937 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,325,829
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,872,477
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,739,966
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,458,340
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,198,306			7,198,306
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,690,162			1,690,162
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,198,306
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,690,162
Operating Properties [Member] | 8967 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,450,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,536,312
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,450,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,536,312
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,986,312			5,986,312
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,720,545			1,720,545
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,986,312
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,720,545
Operating Properties [Member] | 8995 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,087,594
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,610,464
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,055,296
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,642,762
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,698,058			5,698,058
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,261,670			1,261,670
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,698,058
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,261,670
Operating Properties [Member] | 9023 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eden Prairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,956,273
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				6,217,735
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,956,273
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,217,735
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,174,008			8,174,008
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,480,335			2,480,335
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,174,008
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,480,335
Operating Properties [Member] | 2250 Arthur Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Elk Grove, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,403,196
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,386,396
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				110,769
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,403,196
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,497,165
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,900,361			3,900,361
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 201,931			201,931
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,900,361
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 201,931
Operating Properties [Member] | 6600 Business Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Elkridge, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,680,220
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					14,671,910
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				649,715
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,680,220
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					15,321,625
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 19,001,845			19,001,845
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,019,695			1,019,695
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 19,001,845
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,019,695
Operating Properties [Member] | 6675 Business Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Elkridge, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,421,854
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					9,730,192
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				421,361
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,421,854
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,151,553
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 12,573,407			12,573,407
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 687,926			687,926
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 12,573,407
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 687,926
Operating Properties [Member] | 7351 Coca Cola Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Elkridge, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,897,044
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				7,288,821
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,023,417
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,162,448
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 9,185,865			9,185,865
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,640,052			1,640,052
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 9,185,865
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,640,052
Operating Properties [Member] | 21705-21707 Mississippi Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Elwood, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					10,594,259
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					30,329,802
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				895,205
Real Estate and Accumulated Depreciation, Carrying Amount of Land					10,594,259
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					31,225,008
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 41,819,267			41,819,267
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,644,519			3,644,519
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 41,819,267
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,644,519
Operating Properties [Member] | 27143 S Baseline Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Elwood, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					6,022,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,612,934
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				318,163
Real Estate and Accumulated Depreciation, Carrying Amount of Land					6,022,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,931,097
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 11,953,097			11,953,097
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 755,221			755,221
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 11,953,097
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 755,221
Operating Properties [Member] | 1800 Donaldson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Erlanger, KY
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					13,211,604
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				653,387
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					13,864,991
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 13,864,991			13,864,991
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,037,866			2,037,866
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 13,864,991
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,037,866
Operating Properties [Member] | 180 Sheree Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Exton, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,647,861
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					11,334,403
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,496,920
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,649,426
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					13,829,758
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 16,479,184			16,479,184
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,777,650			3,777,650
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 16,479,184
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,777,650
Operating Properties [Member] | 6880 Fairfield Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Fairfield, OH
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					412,136
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,029,177
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				74,745
Real Estate and Accumulated Depreciation, Carrying Amount of Land					412,136
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,103,922
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,516,058			3,516,058
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 235,064			235,064
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,516,058
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 235,064
Operating Properties [Member] | 7000-7018 Fairfield Business [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Fairfield, OH
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					367,925
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,205,817
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				87,643
Real Estate and Accumulated Depreciation, Carrying Amount of Land					367,925
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,293,460
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,661,385			2,661,385
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 185,674			185,674
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,661,385
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 185,674
Operating Properties [Member] | 10721 Jasmine Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Fontana, CA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					11,427,061
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					23,784,779
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,682,426
Real Estate and Accumulated Depreciation, Carrying Amount of Land					11,427,061
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					25,467,205
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 36,894,266			36,894,266
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 390,283			390,283
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 36,894,266
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 390,283
Operating Properties [Member] | 2000 Southpointe Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Forest Park, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					756,221
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					9,115,626
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				508,486
Real Estate and Accumulated Depreciation, Carrying Amount of Land					756,221
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					9,624,112
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 10,380,333			10,380,333
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 770,103			770,103
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 10,380,333
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 770,103
Operating Properties [Member] | 1400 NW 65th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Fort Lauderdale, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					545,480
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,540,210
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				66,119
Real Estate and Accumulated Depreciation, Carrying Amount of Land					545,480
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,606,329
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,151,809			3,151,809
Real Estate and Accumulated Depreciation, Accumulated Depreciation		179,068			179,068
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		3,151,809
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 179,068
Operating Properties [Member] | 6500 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Fort Lauderdale, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,064,734
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				312,146
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,376,880
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,376,880			3,376,880
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 275,900			275,900
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,376,880
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 275,900
Operating Properties [Member] | 6501 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Fort Lauderdale, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					519,984
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,677,465
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				51,998
Real Estate and Accumulated Depreciation, Carrying Amount of Land					519,984
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,729,463
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,249,447			3,249,447
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 198,088			198,088
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,249,447
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 198,088
Operating Properties [Member] | 6600 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Fort Lauderdale, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,988,181
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				189,131
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,177,312
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,177,312			3,177,312
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 262,429			262,429
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,177,312
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 262,429
Operating Properties [Member] | 5400 Alliance Gateway Freeway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Fort Worth, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,515,860
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,710,118
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				417,705
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,515,860
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,127,823
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,643,683			8,643,683
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 699,894			699,894
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,643,683
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 699,894
Operating Properties [Member] | 9601 Cosner Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Fredericksburg, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					475,262
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,917,234
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				242,595
Real Estate and Accumulated Depreciation, Carrying Amount of Land					475,262
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,159,829
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,635,091			4,635,091
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,142,481			2,142,481
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,995
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,635,091
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,142,481
Operating Properties [Member] | 5410 - 5430 Northwest 33rd Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Ft. Lauderdale, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					603,776
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,176,238
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,948,374
Real Estate and Accumulated Depreciation, Carrying Amount of Land					625,111
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,103,277
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,728,388			6,728,388
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,708,183			2,708,183
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,728,388
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,708,183
Operating Properties [Member] | 12601 Industry Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Garden Grove, CA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,048,143
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,088,697
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				70,518
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,048,143
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,159,215
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,207,358			3,207,358
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 166,449			166,449
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,207,358
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 166,449
Operating Properties [Member] | 12641 Industry Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Garden Grove, CA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,766,822
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,539,214
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				132,812
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,766,822
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,672,026
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,438,848			6,438,848
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 221,193			221,193
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,438,848
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 221,193
Operating Properties [Member] | 12681-12691 Pala Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Garden Grove, CA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					5,221,102
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,225,596
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				83,450
Real Estate and Accumulated Depreciation, Carrying Amount of Land					5,220,148
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,310,000
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,530,148			8,530,148
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 162,254			162,254
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,530,148
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 162,254
Operating Properties [Member] | 850 S Jupiter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Garland, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					799,707
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,122,065
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				442,326
Real Estate and Accumulated Depreciation, Carrying Amount of Land					799,707
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,564,391
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,364,098			7,364,098
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 501,325			501,325
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,364,098
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 501,325
Operating Properties [Member] | 2510 W Main Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Grand Prairie, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,785,741
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					11,158,818
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				988,249
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,785,741
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					12,147,067
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 13,932,808			13,932,808
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,226,296			1,226,296
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 13,932,808
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,226,296
Operating Properties [Member] | 4251 North Highway 121 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Grapevine, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,165,780
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					7,799,270
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				422,135
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,165,780
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					8,221,404
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 9,387,184			9,387,184
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 696,539			696,539
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 9,387,184
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 696,539
Operating Properties [Member] | 116 Pleasant Ridge Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Greenville, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,547,811
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				14,182,834
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,712,683
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					12,017,962
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 15,730,645			15,730,645
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,299,069			2,299,069
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 15,730,645
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,299,069
Operating Properties [Member] | 25 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Greenville, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					288,823
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,441,512
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				43,182
Real Estate and Accumulated Depreciation, Carrying Amount of Land					288,823
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,484,694
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,773,517			3,773,517
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 252,214			252,214
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,773,517
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 252,214
Operating Properties [Member] | 45 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Greenville, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					818,114
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,470,587
Real Estate and Accumulated Depreciation, Carrying Amount of Land					825,529
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,463,172
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,288,701			5,288,701
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,000,248			1,000,248
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,288,701
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,000,248
Operating Properties [Member] | 2011 Southtech Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Greenwood, IN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					223,702
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,574,142
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				325,468
Real Estate and Accumulated Depreciation, Carrying Amount of Land					223,702
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,899,610
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,123,312			4,123,312
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 358,722			358,722
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,123,312
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 358,722
Operating Properties [Member] | 2121 Southtech Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Greenwood, IN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					272,823
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,606,920
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				412,167
Real Estate and Accumulated Depreciation, Carrying Amount of Land					272,823
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,019,088
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,291,911			4,291,911
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 478,262			478,262
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,291,911
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 478,262
Operating Properties [Member] | 800 Commerce Parkway West Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Greenwood, IN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,374,664
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					29,963,830
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,612,346
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,374,664
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					31,576,176
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 32,950,840			32,950,840
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,318,432			2,318,432
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 32,950,840
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,318,432
Operating Properties [Member] | 110 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Greer, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					555,549
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				6,331,158
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,228,880
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,657,827
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,886,707			6,886,707
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 178,544			178,544
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,886,707
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 178,544
Operating Properties [Member] | 140 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Greer, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,243,100
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				6,425,239
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,243,100
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,425,239
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,668,339			7,668,339
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 196,553			196,553
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,668,339
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 196,553
Operating Properties [Member] | 1487 South Highway 101 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Greer, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					464,237
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,829,595
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,301,738
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,992,094
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,293,832			6,293,832
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 878,328			878,328
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,293,832
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 878,328
Operating Properties [Member] | 2727 London Grove Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Groveport, OH
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,875,607
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					11,937,935
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				334,714
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,875,607
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					12,272,649
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 14,148,256			14,148,256
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,085,883			1,085,883
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 14,148,256
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,085,883
Operating Properties [Member] | 11835 Newgate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Hagerstown, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					14,121,622
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				23,025,928
Real Estate and Accumulated Depreciation, Carrying Amount of Land					14,121,622
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					23,025,928
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 37,147,550			37,147,550
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 596,879			596,879
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 37,147,550
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 596,879
Operating Properties [Member] | 11841 Newgate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Hagerstown, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,356,207
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				30,555,105
Real Estate and Accumulated Depreciation, Carrying Amount of Land					9,741,685
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					24,169,627
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 33,911,312			33,911,312
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 5,114,351			5,114,351
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,008
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 33,911,312
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 5,114,351
Operating Properties [Member] | 1560 Hunter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Hanover Park, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,639,734
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					12,310,741
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				579,936
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,639,734
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					12,890,677
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 15,530,411			15,530,411
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 981,769			981,769
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 15,530,411
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 981,769
Operating Properties [Member] | 1575 Hunter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Hanover Park, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,293,284
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					17,235,926
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				933,187
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,293,284
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					18,169,113
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 21,462,397			21,462,397
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,390,165			1,390,165
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 21,462,397
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,390,165
Operating Properties [Member] | 7361 Coca Cola Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Hanover, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,245,187
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				9,393,211
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,822,710
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,815,688
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 11,638,398			11,638,398
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,416,465			1,416,465
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 11,638,398
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,416,465
Operating Properties [Member] | 7460 New Ridge Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Hanover, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,785,446
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				7,660,152
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,796,023
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,649,575
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 11,445,598			11,445,598
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 96,683			96,683
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 11,445,598
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 96,683
Operating Properties [Member] | 7462 New Ridge Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Hanover, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,059,337
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				7,479,823
Real Estate and Accumulated Depreciation, Carrying Amount of Land					4,070,629
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,468,531
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 11,539,160			11,539,160
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 137,956			137,956
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 11,539,160
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 137,956
Operating Properties [Member] | 500 McCarthy Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Harrisburg, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					5,194,872
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					19,991,436
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,670,017
Real Estate and Accumulated Depreciation, Carrying Amount of Land					5,687,013
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					24,169,312
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 29,856,325			29,856,325
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 7,740,706			7,740,706
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 29,856,325
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 7,740,706
Operating Properties [Member] | 600 Industrial Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Harrisburg, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					7,743,800
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				29,159,534
Real Estate and Accumulated Depreciation, Carrying Amount of Land					9,368,557
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					27,534,777
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 36,903,334			36,903,334
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 7,874,305			7,874,305
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 36,903,334
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 7,874,305
Operating Properties [Member] | 7195 Grayson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Harrisburg, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					464,534
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,066,272
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				243,707
Real Estate and Accumulated Depreciation, Carrying Amount of Land					464,534
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,309,979
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,774,513			6,774,513
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 449,889			449,889
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,774,513
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 449,889
Operating Properties [Member] | 7253 Grayson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Harrisburg, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					954,130
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					10,585,367
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				506,909
Real Estate and Accumulated Depreciation, Carrying Amount of Land					954,130
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					11,092,276
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 12,046,406			12,046,406
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 728,052			728,052
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 12,046,406
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 728,052
Operating Properties [Member] | 12537 Cerise Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Hawthorne, CA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,203,194
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,758,809
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				94,181
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,203,194
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,852,990
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,056,184			8,056,184
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 388,295			388,295
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,056,184
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 388,295
Operating Properties [Member] | 1010 Petersburg Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Hebron, KY
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					305,471
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,434,505
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				(819,916)
Real Estate and Accumulated Depreciation, Carrying Amount of Land					305,471
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,614,589
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,920,060			4,920,060
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 450,646			450,646
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,920,060
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 450,646
Operating Properties [Member] | 785 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Hebron, KY
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					401,410
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,087,899
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				511,543
Real Estate and Accumulated Depreciation, Carrying Amount of Land					401,410
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,599,442
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,000,852			4,000,852
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 372,958			372,958
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,000,852
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 372,958
Operating Properties [Member] | 805 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Hebron, KY
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					292,096
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,502,486
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				156,556
Real Estate and Accumulated Depreciation, Carrying Amount of Land					292,096
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,659,041
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,951,137			2,951,137
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 244,630			244,630
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,951,137
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 244,630
Operating Properties [Member] | 825 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Hebron, KY
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					370,149
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,095,116
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				357,185
Real Estate and Accumulated Depreciation, Carrying Amount of Land					370,149
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,452,302
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,822,451			3,822,451
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 333,114			333,114
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,822,451
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 333,114
Operating Properties [Member] | 845 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Hebron, KY
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					444,318
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,811,889
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				257,404
Real Estate and Accumulated Depreciation, Carrying Amount of Land					444,318
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,069,293
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,513,611			4,513,611
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 356,426			356,426
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,513,611
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 356,426
Operating Properties [Member] | 1498 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					94,274
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				6,220,665
Real Estate and Accumulated Depreciation, Carrying Amount of Land					791,880
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,523,059
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,314,939			6,314,939
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,345,655			1,345,655
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,314,939
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,345,655
Operating Properties [Member] | 4183 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					122,203
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,216,383
Real Estate and Accumulated Depreciation, Carrying Amount of Land					526,266
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,812,320
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,338,586			3,338,586
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,102,988			1,102,988
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,338,586
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,102,988
Operating Properties [Member] | 4189 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					100,106
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,610,018
Real Estate and Accumulated Depreciation, Carrying Amount of Land					431,106
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,279,018
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,710,124			3,710,124
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,476,028			1,476,028
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,710,124
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,476,028
Operating Properties [Member] | 4195 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					107,586
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,391,467
Real Estate and Accumulated Depreciation, Carrying Amount of Land					505,700
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,993,353
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,499,053			3,499,053
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 818,988			818,988
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,499,053
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 818,988
Operating Properties [Member] | 4328, 4336 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[1]				1,055,450
Real Estate and Accumulated Depreciation, Initial Cost of Land					521,122
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,069,178
Real Estate and Accumulated Depreciation, Carrying Amount of Land					825,092
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,765,208
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,590,300			5,590,300
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,212,331			2,212,331
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,995
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,590,300
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,212,331
Operating Properties [Member] | 4344 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					484,001
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,072,355
Real Estate and Accumulated Depreciation, Carrying Amount of Land					173,623
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,382,733
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,556,356			3,556,356
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,673,063			1,673,063
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,556,356
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,673,063
Operating Properties [Member] | 4380 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					282,996
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,161,830
Real Estate and Accumulated Depreciation, Carrying Amount of Land					283,368
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,161,458
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,444,826			2,444,826
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,055,218			1,055,218
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,444,826
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,055,218
Operating Properties [Member] | 4388 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					143,661
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,214,707
Real Estate and Accumulated Depreciation, Carrying Amount of Land					132,655
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,225,713
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,358,368			1,358,368
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 573,704			573,704
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,358,368
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 573,704
Operating Properties [Member] | 4475 Premier Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					748,693
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				6,806,479
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,525,421
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,029,751
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,555,172			7,555,172
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,127,972			1,127,972
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,555,172
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,127,972
Operating Properties [Member] | 4500 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					230,622
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,805,986
Real Estate and Accumulated Depreciation, Carrying Amount of Land					231,692
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,804,916
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,036,608			3,036,608
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,447,046			1,447,046
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,036,608
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,447,046
Operating Properties [Member] | 4501 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					319,289
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,166,402
Real Estate and Accumulated Depreciation, Carrying Amount of Land					320,450
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,165,241
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,485,691			3,485,691
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,766,943			1,766,943
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,485,691
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,766,943
Operating Properties [Member] | 4523 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					234,564
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,339,774
Real Estate and Accumulated Depreciation, Carrying Amount of Land					235,698
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,338,640
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,574,338			3,574,338
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,105,912			2,105,912
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,574,338
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,105,912
Operating Properties [Member] | 4524 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					182,810
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,779,342
Real Estate and Accumulated Depreciation, Carrying Amount of Land					183,888
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,778,264
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,962,152			2,962,152
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,656,145			1,656,145
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,962,152
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,656,145
Operating Properties [Member] | Unit 5 Logix Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Hinckley, UK
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					10,547,677
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					29,691,911
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				(4,425,698)
Real Estate and Accumulated Depreciation, Carrying Amount of Land					9,387,605
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					26,426,285
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 35,813,890			35,813,890
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,750,647			1,750,647
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 35,813,890
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,750,647
Operating Properties [Member] | 1515 6th Street South [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Hopkins,MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					813,036
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,503,075
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				364,382
Real Estate and Accumulated Depreciation, Carrying Amount of Land					813,036
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,867,457
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,680,493			2,680,493
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 268,536			268,536
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,680,493
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 268,536
Operating Properties [Member] | 1600 5th Street South [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Hopkins,MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					339,336
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,106,454
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				80,794
Real Estate and Accumulated Depreciation, Carrying Amount of Land					339,336
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,187,249
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,526,585			2,526,585
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 159,476			159,476
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,526,585
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 159,476
Operating Properties [Member] | 1000 South Loop West [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					509,351
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,549,504
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				863,453
Real Estate and Accumulated Depreciation, Carrying Amount of Land					509,351
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,412,957
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,922,308			4,922,308
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 398,539			398,539
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,922,308
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 398,539
Operating Properties [Member] | 10241 W Little York Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					558,491
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,740,552
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				133,643
Real Estate and Accumulated Depreciation, Carrying Amount of Land					558,491
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,874,195
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,432,686			6,432,686
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 396,734			396,734
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,432,686
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 396,734
Operating Properties [Member] | 10245 W Little York Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					426,927
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,460,513
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				379,988
Real Estate and Accumulated Depreciation, Carrying Amount of Land					426,927
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,840,501
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,267,428			4,267,428
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 378,078			378,078
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,267,428
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 378,078
Operating Properties [Member] | 10301 Round Up Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					545,501
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,927,700
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,023,687
Real Estate and Accumulated Depreciation, Carrying Amount of Land					545,501
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,951,386
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,496,887			4,496,887
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 424,803			424,803
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,010
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,496,887
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 424,803
Operating Properties [Member] | 10305 Round Up Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,340,609
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					7,489,720
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,358,808
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,340,609
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,848,527
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 12,189,136			12,189,136
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,876,354			1,876,354
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,010
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 12,189,136
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,876,354
Operating Properties [Member] | 1050 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					973,482
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,627,200
Real Estate and Accumulated Depreciation, Carrying Amount of Land					992,093
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,608,589
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,600,682			4,600,682
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 122,958			122,958
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,600,682
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 122,958
Operating Properties [Member] | 10607 Haddington Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					201,469
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,631,561
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				132,607
Real Estate and Accumulated Depreciation, Carrying Amount of Land					201,469
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,764,169
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,965,638			1,965,638
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 148,538			148,538
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,965,638
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 148,538
Operating Properties [Member] | 10735 West Little York Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,110,988
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,351,946
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,274,945
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,135,483
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					9,602,396
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 10,737,879			10,737,879
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,102,435			3,102,435
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 10,737,879
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,102,435
Operating Properties [Member] | 10739 West Little York Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					797,931
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,950,894
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				458,927
Real Estate and Accumulated Depreciation, Carrying Amount of Land					799,560
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,408,192
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,207,752			7,207,752
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,214,384			2,214,384
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,207,752
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,214,384
Operating Properties [Member] | 11201 Greens Crossing Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,006,194
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,412,584
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,781,419
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,008,542
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					8,191,655
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 9,200,197			9,200,197
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,351,372			2,351,372
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 9,200,197
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,351,372
Operating Properties [Member] | 11220 Ella Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,505,855
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				7,397,354
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,534,644
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,368,565
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,903,209			8,903,209
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 162,097			162,097
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,903,209
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 162,097
Operating Properties [Member] | 1283 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					80,730
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					870,656
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				145,476
Real Estate and Accumulated Depreciation, Carrying Amount of Land					80,730
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,016,132
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,096,862			1,096,862
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 91,740			91,740
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,096,862
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 91,740
Operating Properties [Member] | 1287 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					146,654
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,620,780
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				59,710
Real Estate and Accumulated Depreciation, Carrying Amount of Land					146,654
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,680,489
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,827,143			1,827,143
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 163,411			163,411
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,827,143
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 163,411
Operating Properties [Member] | 1291 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					510,102
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,129,042
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				442,674
Real Estate and Accumulated Depreciation, Carrying Amount of Land					510,102
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,571,716
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,081,818			5,081,818
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 389,908			389,908
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,081,818
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 389,908
Operating Properties [Member] | 1416 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					218,850
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,639,902
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				553,328
Real Estate and Accumulated Depreciation, Carrying Amount of Land					218,850
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,193,229
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,412,079			2,412,079
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 188,352			188,352
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,412,079
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 188,352
Operating Properties [Member] | 1420 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					211,279
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,554,156
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				114,556
Real Estate and Accumulated Depreciation, Carrying Amount of Land					211,279
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,668,712
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,879,991			1,879,991
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 145,411			145,411
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,879,991
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 145,411
Operating Properties [Member] | 14200 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,396,794
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,859,739
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,699,632
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,556,901
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,256,533			6,256,533
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 417,555			417,555
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,256,533
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 417,555
Operating Properties [Member] | 1424 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					283,107
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,077,323
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				287,441
Real Estate and Accumulated Depreciation, Carrying Amount of Land					283,107
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,364,764
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,647,871			2,647,871
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 205,864			205,864
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,647,871
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 205,864
Operating Properties [Member] | 1428 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					367,446
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,952,453
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				143,093
Real Estate and Accumulated Depreciation, Carrying Amount of Land					367,446
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,095,545
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,462,991			2,462,991
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 184,076			184,076
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,462,991
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 184,076
Operating Properties [Member] | 14300 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,377,193
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,679,691
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,405,899
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,650,985
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,056,884			7,056,884
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 329,025			329,025
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,056,884
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 329,025
Operating Properties [Member] | 14400 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,830,419
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				7,239,740
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,861,540
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,208,619
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 9,070,159			9,070,159
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 879,677			879,677
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 9,070,159
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 879,677
Operating Properties [Member] | 15102 Sommermeyer St [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					755,121
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,155,774
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				247,397
Real Estate and Accumulated Depreciation, Carrying Amount of Land					755,121
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,403,171
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,158,292			4,158,292
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 308,320			308,320
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,158,292
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 308,320
Operating Properties [Member] | 15150 Sommermeyer St [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					418,580
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,564,587
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				230,574
Real Estate and Accumulated Depreciation, Carrying Amount of Land					418,580
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,795,161
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,213,741			2,213,741
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 167,358			167,358
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,213,741
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 167,358
Operating Properties [Member] | 16330 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,540,109
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				8,528,507
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,966,472
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					8,102,144
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 10,068,616			10,068,616
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 410,845			410,845
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 10,068,616
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 410,845
Operating Properties [Member] | 16405 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					438,853
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,030,396
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				510,089
Real Estate and Accumulated Depreciation, Carrying Amount of Land					438,853
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,540,485
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,979,338			3,979,338
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,716,546			1,716,546
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,979,338
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,716,546
Operating Properties [Member] | 16420 West Hardy Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					529,876
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,267,872
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				334,634
Real Estate and Accumulated Depreciation, Carrying Amount of Land					529,876
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,602,506
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,132,382			4,132,382
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 266,194			266,194
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,132,382
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 266,194
Operating Properties [Member] | 16445 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					363,339
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,509,186
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				288,397
Real Estate and Accumulated Depreciation, Carrying Amount of Land					363,339
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,797,583
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,160,922			3,160,922
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,278,617			1,278,617
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,160,922
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,278,617
Operating Properties [Member] | 1646 Rankin Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					329,961
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,128,210
Real Estate and Accumulated Depreciation, Carrying Amount of Land					592,234
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,865,937
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,458,171			5,458,171
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,215,130			1,215,130
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,458,171
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,215,130
Operating Properties [Member] | 1655 Townhurst Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					197,226
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					935,036
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				524,936
Real Estate and Accumulated Depreciation, Carrying Amount of Land					197,226
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,459,972
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,657,198			1,657,198
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 148,054			148,054
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,657,198
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 148,054
Operating Properties [Member] | 16580 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					289,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,559,857
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,285,142
Real Estate and Accumulated Depreciation, Carrying Amount of Land					289,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,845,000
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,134,000			5,134,000
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,796,918			1,796,918
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,134,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,796,918
Operating Properties [Member] | 16602 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					284,403
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,162,588
Real Estate and Accumulated Depreciation, Carrying Amount of Land					503,779
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,943,212
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,446,991			5,446,991
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,242,290			1,242,290
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,446,991
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,242,290
Operating Properties [Member] | 16605 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					298,999
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,423,751
Real Estate and Accumulated Depreciation, Carrying Amount of Land					496,186
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,226,564
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,722,750			3,722,750
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,102,188			1,102,188
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,722,750
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,102,188
Operating Properties [Member] | 1665 Townhurst Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					452,439
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,016,585
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				57,074
Real Estate and Accumulated Depreciation, Carrying Amount of Land					452,439
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,073,658
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,526,097			2,526,097
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 144,198			144,198
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,526,097
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 144,198
Operating Properties [Member] | 16680 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					311,952
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,169,789
Real Estate and Accumulated Depreciation, Carrying Amount of Land					492,869
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,988,872
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,481,741			4,481,741
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,148,408			1,148,408
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,481,741
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,148,408
Operating Properties [Member] | 16685 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					414,691
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,463,366
Real Estate and Accumulated Depreciation, Carrying Amount of Land					414,691
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,463,366
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,878,057			2,878,057
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 710,865			710,865
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,878,057
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 710,865
Operating Properties [Member] | 1755 Trans Central Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					293,534
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,036,269
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,334,826
Real Estate and Accumulated Depreciation, Carrying Amount of Land					306,147
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,358,482
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,664,629			4,664,629
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,321,325			1,321,325
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,664,629
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,321,325
Operating Properties [Member] | 4301 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					226,973
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,174,979
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				77,965
Real Estate and Accumulated Depreciation, Carrying Amount of Land					226,973
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,252,944
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,479,917			1,479,917
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 125,330			125,330
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,479,917
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 125,330
Operating Properties [Member] | 4401 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					244,240
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,412,622
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				101,328
Real Estate and Accumulated Depreciation, Carrying Amount of Land					244,240
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,513,950
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,758,190			1,758,190
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 212,509			212,509
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,758,190
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 212,509
Operating Properties [Member] | 4501 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					252,907
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,504,053
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				68,496
Real Estate and Accumulated Depreciation, Carrying Amount of Land					252,907
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,572,549
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,825,456			1,825,456
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 182,795			182,795
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,825,456
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 182,795
Operating Properties [Member] | 5200 N. Sam Houston Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,519,458
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					7,135,548
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,703,478
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,520,074
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,838,410
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 12,358,484			12,358,484
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,963,534			2,963,534
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 12,358,484
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,963,534
Operating Properties [Member] | 5250 N. Sam Houston Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,173,287
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					8,868,256
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,745,460
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,173,942
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					11,613,061
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 13,787,003			13,787,003
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,762,980			2,762,980
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 13,787,003
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,762,980
Operating Properties [Member] | 5500 N. Sam Houston Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,243,541
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				6,456,833
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,513,152
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,187,222
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,700,374			7,700,374
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 845,387			845,387
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,700,374
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 845,387
Operating Properties [Member] | 8017 Pinemont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					900,953
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,323,727
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				401,019
Real Estate and Accumulated Depreciation, Carrying Amount of Land					900,953
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,724,746
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,625,699			6,625,699
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 393,315			393,315
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,625,699
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 393,315
Operating Properties [Member] | 8272 El Rio Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					530,494
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,108,626
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				302,577
Real Estate and Accumulated Depreciation, Carrying Amount of Land					530,494
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,411,203
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,941,697			4,941,697
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 349,877			349,877
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,941,697
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 349,877
Operating Properties [Member] | 8282 El Rio Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					450,422
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,304,942
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,076,398
Real Estate and Accumulated Depreciation, Carrying Amount of Land					450,422
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,381,340
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,831,762			4,831,762
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 348,376			348,376
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,831,762
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 348,376
Operating Properties [Member] | 8301 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,515,862
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				26,899,370
Real Estate and Accumulated Depreciation, Carrying Amount of Land					7,083,514
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					24,331,718
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 31,415,232			31,415,232
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 4,891,588			4,891,588
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 31,415,232
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 4,891,588
Operating Properties [Member] | 8303 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,613,370
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				13,408,133
Real Estate and Accumulated Depreciation, Carrying Amount of Land					4,858,012
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					13,163,491
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 18,021,503			18,021,503
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 175,130			175,130
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 18,021,503
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 175,130
Operating Properties [Member] | 850 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,893,405
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					11,593,197
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,914,238
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,899,861
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					14,500,978
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 17,400,839			17,400,839
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,963,281			2,963,281
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 17,400,839
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,963,281
Operating Properties [Member] | 860 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,399,365
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,344,650
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,583,440
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,374,012
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,953,443
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 9,327,455			9,327,455
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,694,472			1,694,472
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 9,327,455
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,694,472
Operating Properties [Member] | 8801-19 & 8821-49 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,290,001
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					15,297,141
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,077,957
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,290,002
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					17,375,097
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 19,665,099			19,665,099
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 5,655,134			5,655,134
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 19,665,099
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 5,655,134
Operating Properties [Member] | 8802-8824 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,774,995
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,364,767
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,366,797
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,775,021
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,731,537
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 10,506,558			10,506,558
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,582,582			2,582,582
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 10,506,558
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,582,582
Operating Properties [Member] | 8825-8839 N Sam Houston Pkwy [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					638,453
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,258,815
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				691,043
Real Estate and Accumulated Depreciation, Carrying Amount of Land					638,477
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,949,833
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,588,310			4,588,310
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,117,598			1,117,598
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,588,310
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,117,598
Operating Properties [Member] | 8850-8872 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					504,317
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,878,351
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,229,017
Real Estate and Accumulated Depreciation, Carrying Amount of Land					504,341
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,107,344
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,611,685			4,611,685
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,594,524			1,594,524
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,611,685
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,594,524
Operating Properties [Member] | Liberty 11 at Central Green [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,748,348
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				9,341,500
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,120,319
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					8,969,529
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 11,089,848			11,089,848
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 823,048			823,048
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 11,089,848
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 823,048
Operating Properties [Member] | Cabot III UK1B01 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Isle of Man, UK
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					11,888,058
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					35,003,668
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				(5,157,005)
Real Estate and Accumulated Depreciation, Carrying Amount of Land					10,580,565
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					31,154,156
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 41,734,721			41,734,721
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,992,227			1,992,227
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 41,734,721
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,992,227
Operating Properties [Member] | 1011 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Itasca, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					842,043
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					984,087
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				189,936
Real Estate and Accumulated Depreciation, Carrying Amount of Land					842,043
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,174,023
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,016,066			2,016,066
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 88,861			88,861
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,016,066
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 88,861
Operating Properties [Member] | 1035 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Itasca, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					875,172
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,071,051
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				121,166
Real Estate and Accumulated Depreciation, Carrying Amount of Land					875,172
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,192,218
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,067,390			3,067,390
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 138,233			138,233
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,067,390
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 138,233
Operating Properties [Member] | 1549 W Glenlake Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Itasca, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,339,627
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,763,288
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				185,677
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,339,627
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,948,964
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,288,591			5,288,591
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 291,168			291,168
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,288,591
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 291,168
Operating Properties [Member] | 901 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Itasca, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					866,378
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,112,616
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				47,808
Real Estate and Accumulated Depreciation, Carrying Amount of Land					866,378
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,160,424
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,026,802			3,026,802
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 147,854			147,854
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,026,802
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 147,854
Operating Properties [Member] | 925 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Itasca, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					945,251
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,010,181
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				47,379
Real Estate and Accumulated Depreciation, Carrying Amount of Land					945,251
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,057,560
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,002,811			3,002,811
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 136,677			136,677
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,002,811
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 136,677
Operating Properties [Member] | 8241 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Jessup, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,246,618
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,844,393
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				651,604
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,246,618
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,495,996
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,742,614			8,742,614
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 540,291			540,291
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,742,614
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 540,291
Operating Properties [Member] | 8242 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Jessup, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,488,746
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					9,072,440
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,208,798
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,488,746
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,281,238
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 11,769,984			11,769,984
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 768,853			768,853
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 11,769,984
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 768,853
Operating Properties [Member] | 8246 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Jessup, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					590,922
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,374,522
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				112,794
Real Estate and Accumulated Depreciation, Carrying Amount of Land					590,922
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,487,316
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,078,238			4,078,238
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 255,854			255,854
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,078,238
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 255,854
Operating Properties [Member] | 1305 Chastain Road NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Kennesaw, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					808,159
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,712,959
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,017,065
Real Estate and Accumulated Depreciation, Carrying Amount of Land					808,159
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,730,024
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,538,183			7,538,183
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 586,156			586,156
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,538,183
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 586,156
Operating Properties [Member] | 1325 Chastain Road NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Kennesaw, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,612,924
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					9,771,680
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,389,657
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,612,924
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					11,161,337
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 12,774,261			12,774,261
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,143,207			1,143,207
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 12,774,261
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,143,207
Operating Properties [Member] | 3600 Cobb International Bld NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Kennesaw, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					716,860
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,962,212
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				442,015
Real Estate and Accumulated Depreciation, Carrying Amount of Land					716,860
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,404,228
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,121,088			8,121,088
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 656,764			656,764
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,121,088
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 656,764
Operating Properties [Member] | Unit 1 Bear Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Kettering, UK
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					10,849,890
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					36,219,855
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				(5,176,905)
Real Estate and Accumulated Depreciation, Carrying Amount of Land					9,656,579
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					32,236,261
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 41,892,840			41,892,840
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,079,669			2,079,669
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 41,892,840
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,079,669
Operating Properties [Member] | 151 South Warner Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,218,086
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,937,866
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				6,843,514
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,187,900
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					13,811,566
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 14,999,466			14,999,466
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,523,628			2,523,628
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,980
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 14,999,466
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,523,628
Operating Properties [Member] | 2100 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,110,111
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				12,333,739
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,132,519
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					12,311,331
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 13,443,850			13,443,850
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 4,888,805			4,888,805
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 13,443,850
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 4,888,805
Operating Properties [Member] | 2201 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,370,895
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				15,284,223
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,413,514
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					15,241,604
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 17,655,118			17,655,118
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 6,642,496			6,642,496
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 17,655,118
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 6,642,496
Operating Properties [Member] | 2300 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					509,580
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,059,700
Real Estate and Accumulated Depreciation, Carrying Amount of Land					574,152
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,995,128
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,569,280			3,569,280
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,636,559			1,636,559
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,569,280
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,636,559
Operating Properties [Member] | 2301 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,645,246
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				30,080,438
Real Estate and Accumulated Depreciation, Carrying Amount of Land					4,581,649
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					27,144,035
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 31,725,684			31,725,684
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 11,446,832			11,446,832
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 31,725,684
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 11,446,832
Operating Properties [Member] | 2500 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					509,580
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,665,152
Real Estate and Accumulated Depreciation, Carrying Amount of Land					592,886
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,581,846
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,174,732			3,174,732
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,328,497			1,328,497
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,174,732
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,328,497
Operating Properties [Member] | 2520 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,020,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,985,162
Real Estate and Accumulated Depreciation, Carrying Amount of Land					978,402
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,026,760
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,005,162			6,005,162
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,504,856			1,504,856
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,005,162
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,504,856
Operating Properties [Member] | 2560 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					607,210
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,652,052
Real Estate and Accumulated Depreciation, Carrying Amount of Land					649,792
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,609,470
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,259,262			3,259,262
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,031,061			1,031,061
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,259,262
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,031,061
Operating Properties [Member] | 2700 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					764,370
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,187,801
Real Estate and Accumulated Depreciation, Carrying Amount of Land					867,815
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,084,356
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,952,171			3,952,171
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,338,373			1,338,373
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,952,171
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,338,373
Operating Properties [Member] | 2900 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					679,440
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,516,054
Real Estate and Accumulated Depreciation, Carrying Amount of Land					774,096
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,421,398
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,195,494			4,195,494
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,676,885			1,676,885
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,195,494
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,676,885
Operating Properties [Member] | 3000 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,191,449
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,476,299
Real Estate and Accumulated Depreciation, Carrying Amount of Land					946,703
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,721,045
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,667,748			3,667,748
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,184,789			1,184,789
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,667,748
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,184,789
Operating Properties [Member] | 3100 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					601,956
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,235,108
Real Estate and Accumulated Depreciation, Carrying Amount of Land					611,436
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,225,628
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,837,064			2,837,064
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 938,955			938,955
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,995
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,837,064
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 938,955
Operating Properties [Member] | 3200 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					928,637
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				7,367,311
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,210,137
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,085,811
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,295,948			8,295,948
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,918,094			2,918,094
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,295,948
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,918,094
Operating Properties [Member] | 3400 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					776,496
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,139,068
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,537,958
Real Estate and Accumulated Depreciation, Carrying Amount of Land					776,496
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,677,025
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,453,521			5,453,521
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,124,950			2,124,950
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,995
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,453,521
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,124,950
Operating Properties [Member] | 3500 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,204,839
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,830,072
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,223,875
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,811,036
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,034,911			4,034,911
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,352,895			1,352,895
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,034,911
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,352,895
Operating Properties [Member] | 3600 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					236,432
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,856,252
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				822,286
Real Estate and Accumulated Depreciation, Carrying Amount of Land					236,432
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,678,538
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,914,970			2,914,970
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,229,096			1,229,096
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,914,970
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,229,096
Operating Properties [Member] | 3602 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					217,734
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,759,489
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				420,954
Real Estate and Accumulated Depreciation, Carrying Amount of Land					217,809
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,180,368
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,398,177			2,398,177
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,086,908			1,086,908
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,398,177
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,086,908
Operating Properties [Member] | 3604 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					397,178
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,836,269
Real Estate and Accumulated Depreciation, Carrying Amount of Land					350,874
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,882,573
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,233,447			2,233,447
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,010,560			1,010,560
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,233,447
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,010,560
Operating Properties [Member] | 440 East Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					717,001
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,816,121
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,824,138
Real Estate and Accumulated Depreciation, Carrying Amount of Land					717,001
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,640,259
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,357,260			8,357,260
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 4,114,770			4,114,770
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,357,260
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 4,114,770
Operating Properties [Member] | 460 East Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					705,317
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,737,487
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,293,459
Real Estate and Accumulated Depreciation, Carrying Amount of Land					705,317
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					9,030,946
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 9,736,263			9,736,263
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 4,118,174			4,118,174
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 9,736,263
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 4,118,174
Operating Properties [Member] | 650 Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					952,911
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,722,830
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				8,145,922
Real Estate and Accumulated Depreciation, Carrying Amount of Land					952,911
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					14,868,752
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 15,821,663			15,821,663
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 7,525,591			7,525,591
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,971
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 15,821,663
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 7,525,591
Operating Properties [Member] | 680 Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		King of Prussia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					952,361
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,722,830
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				7,217,277
Real Estate and Accumulated Depreciation, Carrying Amount of Land					952,361
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					13,940,107
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 14,892,468			14,892,468
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 7,102,027			7,102,027
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,971
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 14,892,468
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 7,102,027
Operating Properties [Member] | 1700 Interstate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Lakeland, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					650,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,444,220
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				0
Real Estate and Accumulated Depreciation, Carrying Amount of Land					650,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,444,220
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,094,220			6,094,220
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 470,057			470,057
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,094,220
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 470,057
Operating Properties [Member] | 5801 Columbia Park Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Landover,MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,187,620
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,598,346
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				182,789
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,187,620
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,781,135
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,968,755			5,968,755
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 376,118			376,118
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,968,755
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 376,118
Operating Properties [Member] | 11425 State Highway 225 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		LaPorte, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					975,974
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,409,036
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				100,699
Real Estate and Accumulated Depreciation, Carrying Amount of Land					977,542
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,508,166
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,485,708			4,485,708
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 896,629			896,629
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,485,708
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 896,629
Operating Properties [Member] | 11503 State Highway 225 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		LaPorte, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,561,931
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					9,695,493
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				237,274
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,566,047
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					9,928,651
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 12,494,698			12,494,698
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,436,228			2,436,228
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 12,494,698
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,436,228
Operating Properties [Member] | 1701 South 16th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		LaPorte, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,063,262
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					18,719,368
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				14,007
Real Estate and Accumulated Depreciation, Carrying Amount of Land					4,063,262
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					18,733,375
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 22,796,637			22,796,637
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 175,899			175,899
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 22,796,637
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 175,899
Operating Properties [Member] | 1842 South 16th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		LaPorte, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,226,284
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					11,976,185
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,226,284
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					11,976,185
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 14,202,469			14,202,469
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 121,220			121,220
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 14,202,469
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 121,220
Operating Properties [Member] | 1902 South 16th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		LaPorte, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,369,095
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					14,119,020
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				0
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,369,095
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					14,119,020
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 16,488,115			16,488,115
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 153,661			153,661
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 16,488,115
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 153,661
Operating Properties [Member] | 640 S State Road 39 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Lebanon,IN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,612,787
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					18,065,552
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,217,751
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,612,787
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					19,283,303
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 20,896,090			20,896,090
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,576,732			1,576,732
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 20,896,090
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,576,732
Operating Properties [Member] | 7528 Walker Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Lehigh, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					893,441
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,510,457
Real Estate and Accumulated Depreciation, Carrying Amount of Land					779,330
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,624,568
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,403,898			6,403,898
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,002,593			2,002,593
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,403,898
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,002,593
Operating Properties [Member] | 8301 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Lehigh, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					11,249,550
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				45,852,967
Real Estate and Accumulated Depreciation, Carrying Amount of Land					11,254,716
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					45,847,801
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 57,102,517			57,102,517
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 11,516,501			11,516,501
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 57,102,517
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 11,516,501
Operating Properties [Member] | 8500 Willard Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Lehigh, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[1]				1,308,636
Real Estate and Accumulated Depreciation, Initial Cost of Land					6,398,815
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				33,693,805
Real Estate and Accumulated Depreciation, Carrying Amount of Land					11,353,373
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					28,739,247
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 40,092,620			40,092,620
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 4,225,699			4,225,699
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 40,092,620
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 4,225,699
Operating Properties [Member] | 875 Maxham Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Lithia Springs, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					445,493
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					10,160,616
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				560,063
Real Estate and Accumulated Depreciation, Carrying Amount of Land					445,493
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,720,679
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 11,166,172			11,166,172
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 817,306			817,306
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 11,166,172
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 817,306
Operating Properties [Member] | 7533 Industrial Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Lower Macungie, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					5,603,460
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					18,807,987
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,473,288
Real Estate and Accumulated Depreciation, Carrying Amount of Land					5,603,460
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					21,281,275
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 26,884,735			26,884,735
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,285,891			3,285,891
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 26,884,735
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,285,891
Operating Properties [Member] | 1 Country View Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					400,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,600,000
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				8,440,217
Real Estate and Accumulated Depreciation, Carrying Amount of Land					406,421
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					12,033,796
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 12,440,217			12,440,217
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 4,233,709			4,233,709
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,982
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 12,440,217
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 4,233,709
Operating Properties [Member] | 1 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					419,460
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,792,570
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,497,873
Real Estate and Accumulated Depreciation, Carrying Amount of Land					419,460
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,290,443
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,709,903			5,709,903
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,430,271			2,430,271
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,982
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,709,903
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,430,271
Operating Properties [Member] | 10 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					823,540
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,341,376
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				441,766
Real Estate and Accumulated Depreciation, Carrying Amount of Land					832,244
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,774,438
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,606,682			2,606,682
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 991,773			991,773
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,606,682
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		991,773
Operating Properties [Member] | 10 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					509,075
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,713,241
Real Estate and Accumulated Depreciation, Carrying Amount of Land					509,899
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,712,417
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		3,222,316			3,222,316
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,928,155			1,928,155
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,984
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,222,316
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,928,155
Operating Properties [Member] | 10, 20 Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					724,058
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,938,247
Real Estate and Accumulated Depreciation, Carrying Amount of Land					724,846
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,937,459
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,662,305			6,662,305
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,867,193			3,867,193
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,662,305
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,867,193
Operating Properties [Member] | 100 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,320,625
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				7,509,345
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,977,935
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,852,035
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,829,970			8,829,970
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,650,379			3,650,379
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,829,970
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,650,379
Operating Properties [Member] | 1001 Cedar Hollow Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,436,814
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				16,464,560
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,676,470
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					16,224,904
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 17,901,374			17,901,374
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 8,391,087			8,391,087
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 17,901,374
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 8,391,087
Operating Properties [Member] | 11 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					496,297
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,933,302
Real Estate and Accumulated Depreciation, Carrying Amount of Land					708,331
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,721,268
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,429,599			2,429,599
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,465,358			1,465,358
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,429,599
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,465,358
Operating Properties [Member] | 11,15 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,837,050
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				14,958,472
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,837,878
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					14,957,644
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 16,795,522			16,795,522
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 13,914,941			13,914,941
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,986
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 16,795,522
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 13,914,941
Operating Properties [Member] | 12,14,16 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					130,689
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,299,026
Real Estate and Accumulated Depreciation, Carrying Amount of Land					128,767
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,300,948
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,429,715			1,429,715
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,027,154			1,027,154
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,982
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,429,715
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,027,154
Operating Properties [Member] | 14 Lee Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					664,282
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,887,728
Real Estate and Accumulated Depreciation, Carrying Amount of Land					643,892
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,908,118
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,552,010			6,552,010
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,948,650			3,948,650
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,552,010
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,948,650
Operating Properties [Member] | 155 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					625,147
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,640,082
Real Estate and Accumulated Depreciation, Carrying Amount of Land					626,068
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,639,161
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,265,229			3,265,229
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,087,960			2,087,960
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,981
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,265,229
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,087,960
Operating Properties [Member] | 18 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					394,036
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,976,221
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				(1,229,407)
Real Estate and Accumulated Depreciation, Carrying Amount of Land					397,293
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,743,557
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,140,850			3,140,850
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,929,736			1,929,736
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,980
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,140,850
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,929,736
Operating Properties [Member] | 2 West Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					5,405,041
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				12,244,703
Real Estate and Accumulated Depreciation, Carrying Amount of Land					5,405,042
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					12,244,702
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 17,649,744			17,649,744
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,922,198			3,922,198
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 17,649,744
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,922,198
Operating Properties [Member] | 20 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					465,539
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				6,326,058
Real Estate and Accumulated Depreciation, Carrying Amount of Land					466,413
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,325,184
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,791,597			6,791,597
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,609,500			3,609,500
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,987
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,791,597
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,609,500
Operating Properties [Member] | 200 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					495,893
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,739,093
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				698,060
Real Estate and Accumulated Depreciation, Carrying Amount of Land					812,745
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,120,301
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,933,046			3,933,046
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,560,393			2,560,393
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,933,046
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,560,393
Operating Properties [Member] | 257-275 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					504,611
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,097,623
Real Estate and Accumulated Depreciation, Carrying Amount of Land					505,458
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,096,776
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,602,234			5,602,234
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,762,693			3,762,693
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,983
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,602,234
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,762,693
Operating Properties [Member] | 27-43 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					448,775
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,462,600
Real Estate and Accumulated Depreciation, Carrying Amount of Land					449,447
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,461,928
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,911,375			2,911,375
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,965,745			1,965,745
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,977
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,911,375
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,965,745
Operating Properties [Member] | 277-293 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					530,729
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,293,109
Real Estate and Accumulated Depreciation, Carrying Amount of Land					531,534
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,292,304
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,823,838			2,823,838
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,645,958			1,645,958
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,984
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,823,838
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,645,958
Operating Properties [Member] | 3 Country View Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					814,278
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,142,433
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,128,881
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,827,830
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,956,711			5,956,711
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,151,209			2,151,209
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,956,711
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,151,209
Operating Properties [Member] | 30 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					128,126
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				578,846
Real Estate and Accumulated Depreciation, Carrying Amount of Land					128,783
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					578,189
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 706,972			706,972
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 431,050			431,050
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,975
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 706,972
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 431,050
Operating Properties [Member] | 300 Technology Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					368,626
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,674,659
Real Estate and Accumulated Depreciation, Carrying Amount of Land					374,497
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,668,788
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,043,285			2,043,285
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 974,979			974,979
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,043,285
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 974,979
Operating Properties [Member] | 300-400 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					937,212
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				6,310,460
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,402,795
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,844,877
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,247,672			7,247,672
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,158,514			3,158,514
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,247,672
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,158,514
Operating Properties [Member] | 311 Technology Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					397,131
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,710,506
Real Estate and Accumulated Depreciation, Carrying Amount of Land					397,948
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,709,689
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,107,637			3,107,637
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,087,871			2,087,871
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,984
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,107,637
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,087,871
Operating Properties [Member] | 333 Phoenixville Pike [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					523,530
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,708,843
Real Estate and Accumulated Depreciation, Carrying Amount of Land					524,230
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,708,143
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,232,373			4,232,373
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,519,003			2,519,003
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,232,373
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,519,003
Operating Properties [Member] | 40 Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,241,137
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					17,737,090
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,331,417
Real Estate and Accumulated Depreciation, Carrying Amount of Land					4,241,166
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					19,068,477
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 23,309,643			23,309,643
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 6,715,218			6,715,218
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 23,309,643
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 6,715,218
Operating Properties [Member] | 40 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					322,918
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,338,034
Real Estate and Accumulated Depreciation, Carrying Amount of Land					325,775
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,335,177
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,660,952			3,660,952
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,728,072			1,728,072
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,987
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,660,952
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,728,072
Operating Properties [Member] | 420 Lapp Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,054,418
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				8,894,039
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,055,243
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					8,893,214
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 9,948,457			9,948,457
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 5,107,113			5,107,113
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 9,948,457
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 5,107,113
Operating Properties [Member] | 425 Old Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,847,501
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				45,847,471
Real Estate and Accumulated Depreciation, Carrying Amount of Land					9,953,208
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					39,741,764
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 49,694,972			49,694,972
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,440,221			1,440,221
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 49,694,972
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,440,221
Operating Properties [Member] | 425 Technology Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					191,114
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,708,623
Real Estate and Accumulated Depreciation, Carrying Amount of Land					321,473
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,578,264
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,899,737			1,899,737
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 777,850			777,850
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,899,737
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 777,850
Operating Properties [Member] | 45 Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,380,221
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				15,322,821
Real Estate and Accumulated Depreciation, Carrying Amount of Land					4,749,748
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					14,953,294
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 19,703,042			19,703,042
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 7,853,956			7,853,956
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 19,703,042
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 7,853,956
Operating Properties [Member] | 45-67 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					795,143
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,810,941
Real Estate and Accumulated Depreciation, Carrying Amount of Land					795,831
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,810,253
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,606,084			5,606,084
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,261,529			3,261,529
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,974
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,606,084
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,261,529
Operating Properties [Member] | 5 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					684,200
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,181,661
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,433,278
Real Estate and Accumulated Depreciation, Carrying Amount of Land					684,200
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					8,614,939
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 9,299,139			9,299,139
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,892,306			3,892,306
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,983
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 9,299,139
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,892,306
Operating Properties [Member] | 50 Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					849,576
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				14,095,935
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,337,076
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					13,608,435
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 14,945,511			14,945,511
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 7,142,147			7,142,147
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 14,945,511
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 7,142,147
Operating Properties [Member] | 50 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					323,971
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,097,099
Real Estate and Accumulated Depreciation, Carrying Amount of Land					323,792
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,097,278
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,421,070			3,421,070
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,715,770			1,715,770
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,987
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,421,070
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,715,770
Operating Properties [Member] | 500 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					472,364
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,162,401
Real Estate and Accumulated Depreciation, Carrying Amount of Land					762,370
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,872,395
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,634,765			3,634,765
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,822,114			1,822,114
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,634,765
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,822,114
Operating Properties [Member] | 508 Lapp Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					331,392
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,653,624
Real Estate and Accumulated Depreciation, Carrying Amount of Land					332,216
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,652,800
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,985,016			1,985,016
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,239,476			1,239,476
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,984
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,985,016
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,239,476
Operating Properties [Member] | 510 Lapp Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					356,950
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				926,587
Real Estate and Accumulated Depreciation, Carrying Amount of Land					357,751
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					925,786
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,283,537			1,283,537
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 767,105			767,105
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,983
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,283,537
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 767,105
Operating Properties [Member] | 55 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					215,005
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,674,159
Real Estate and Accumulated Depreciation, Carrying Amount of Land					215,818
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,673,346
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,889,164			4,889,164
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,362,628			3,362,628
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,983
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,889,164
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,362,628
Operating Properties [Member] | 60 Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					865,424
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					9,285,000
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,598,450
Real Estate and Accumulated Depreciation, Carrying Amount of Land					884,974
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					14,863,900
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 15,748,874			15,748,874
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 9,641,208			9,641,208
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 15,748,874
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 9,641,208
Operating Properties [Member] | 600 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,013,750
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				9,359,782
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,798,565
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					8,574,967
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 11,373,532			11,373,532
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 4,318,193			4,318,193
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 11,373,532
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 4,318,193
Operating Properties [Member] | 65 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					381,544
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				7,371,688
Real Estate and Accumulated Depreciation, Carrying Amount of Land					382,361
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,370,871
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,753,232			7,753,232
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 5,680,759			5,680,759
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,983
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,753,232
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 5,680,759
Operating Properties [Member] | 7 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					176,435
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				7,669,918
Real Estate and Accumulated Depreciation, Carrying Amount of Land					177,317
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,669,036
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,846,353			7,846,353
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,710,578			3,710,578
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,846,353
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,710,578
Operating Properties [Member] | 700 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,013,750
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				9,090,281
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,785,823
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					8,318,208
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 11,104,031			11,104,031
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 4,266,657			4,266,657
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 11,104,031
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 4,266,657
Operating Properties [Member] | 75 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					143,074
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				618,372
Real Estate and Accumulated Depreciation, Carrying Amount of Land					143,811
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					617,635
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 761,446			761,446
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 530,257			530,257
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,977
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 761,446
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 530,257
Operating Properties [Member] | 77-123 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					887,664
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,878,044
Real Estate and Accumulated Depreciation, Carrying Amount of Land					888,359
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,877,349
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,765,708			6,765,708
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 4,180,373			4,180,373
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,978
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,765,708
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 4,180,373
Operating Properties [Member] | 1169 Canton Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Marietta, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,232,219
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					17,897,326
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				437,586
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,232,219
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					18,334,912
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 19,567,131			19,567,131
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,266,254			1,266,254
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 19,567,131
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,266,254
Operating Properties [Member] | 65 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Mauldin, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					557,174
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,856,020
Real Estate and Accumulated Depreciation, Carrying Amount of Land					506,318
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,906,876
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,413,194			3,413,194
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 815,741			815,741
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,413,194
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 815,741
Operating Properties [Member] | 75 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Mauldin, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					419,731
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,341,147
Real Estate and Accumulated Depreciation, Carrying Amount of Land					430,909
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,329,969
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,760,878			2,760,878
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 692,328			692,328
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,760,878
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 692,328
Operating Properties [Member] | 126-132 Liberty Industrial Pkw [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		McDonough, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					600,666
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,184,131
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				548,801
Real Estate and Accumulated Depreciation, Carrying Amount of Land					600,666
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,732,931
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,333,597			5,333,597
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 562,055			562,055
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,333,597
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 562,055
Operating Properties [Member] | 95-115 Liberty Industrial Pkwy [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		McDonough, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					660,420
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,785,127
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				554,330
Real Estate and Accumulated Depreciation, Carrying Amount of Land					660,420
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,339,457
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,999,877			5,999,877
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 573,447			573,447
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,999,877
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 573,447
Operating Properties [Member] | 11150 NW 122nd Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Medley, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					6,627,899
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				12,312,993
Real Estate and Accumulated Depreciation, Carrying Amount of Land					6,627,899
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					12,312,993
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 18,940,892			18,940,892
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 23,539			23,539
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 18,940,892
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 23,539
Operating Properties [Member] | 11401 NW 134th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Medley, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					5,558,619
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					17,678,237
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,058,964
Real Estate and Accumulated Depreciation, Carrying Amount of Land					5,558,619
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					18,737,201
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 24,295,820			24,295,820
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,568,252			1,568,252
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 24,295,820
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,568,252
Operating Properties [Member] | 11450 NW 122nd Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Medley, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,623,293
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				11,424,123
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,919,238
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					9,128,178
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 13,047,416			13,047,416
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 165,377			165,377
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 13,047,416
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 165,377
Operating Properties [Member] | 12501 & 12701 Whitewater Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Minnetonka, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,175,209
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,948,085
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				8,784,706
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,177,953
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					12,730,047
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 14,908,000			14,908,000
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 4,418,348			4,418,348
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,986
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 14,908,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 4,418,348
Operating Properties [Member] | 12800 Whitewater Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Minnetonka, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,273,600
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,158,737
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,172,758
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,273,731
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,331,363
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,605,094			6,605,094
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 621,422			621,422
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,605,094
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 621,422
Operating Properties [Member] | 12900 Whitewater Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Minnetonka, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,236,560
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,762,325
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,465,285
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,236,687
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,227,483
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,464,170			5,464,170
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 525,972			525,972
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,464,170
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 525,972
Operating Properties [Member] | 456 International Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Minooka, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,862,683
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					14,357,981
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,589,711
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,862,683
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					18,947,692
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 22,810,375			22,810,375
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,412,246			1,412,246
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 22,810,375
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,412,246
Operating Properties [Member] | 3100 SW 145th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Miramar, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					6,204,407
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				17,244,782
Real Estate and Accumulated Depreciation, Carrying Amount of Land					6,265,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					17,184,189
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 23,449,189			23,449,189
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,082,595			3,082,595
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 23,449,189
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,082,595
Operating Properties [Member] | 3350 SW 148th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Miramar, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,960,511
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				18,964,847
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,980,689
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					18,944,669
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 21,925,358			21,925,358
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 7,494,426			7,494,426
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 21,925,358
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 7,494,426
Operating Properties [Member] | 3400 Lakeside Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Miramar, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,022,153
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					11,345,881
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,559,388
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,022,153
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					13,905,269
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 15,927,422			15,927,422
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 6,122,348			6,122,348
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 15,927,422
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 6,122,348
Operating Properties [Member] | 3450 Lakeside Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Miramar, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,022,152
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					11,357,143
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,368,718
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,022,152
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					14,725,861
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 16,748,013			16,748,013
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 6,870,656			6,870,656
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 16,748,013
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 6,870,656
Operating Properties [Member] | 21 S Middlesex Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Monroe Township, NJ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,097,170
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					9,715,401
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				561,745
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,097,170
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,277,146
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 12,374,316			12,374,316
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 900,093			900,093
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 12,374,316
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 900,093
Operating Properties [Member] | 4 S Middlesex Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Monroe Township, NJ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,263,153
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					10,261,759
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				599,026
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,263,153
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,860,785
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 13,123,938			13,123,938
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 863,362			863,362
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 13,123,938
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 863,362
Operating Properties [Member] | 22750 Cactus Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Moreno Valley, CA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					9,404,283
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					24,380,934
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,851,865
Real Estate and Accumulated Depreciation, Carrying Amount of Land					9,408,276
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					26,228,806
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 35,637,082			35,637,082
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,145,548			1,145,548
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 35,637,082
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,145,548
Operating Properties [Member] | 323 Park Knoll Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Morrisville, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[1]				2,448,428
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,071,600
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,397,807
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,029,987
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,071,600
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,427,794
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,499,394			6,499,394
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,121,720			1,121,720
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,010
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,499,394
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,121,720
Operating Properties [Member] | 324 Park Knoll Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Morrisville, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,449,092
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,424,932
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				330,260
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,449,450
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,754,834
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,204,284			6,204,284
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,135,785			1,135,785
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,204,284
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,135,785
Operating Properties [Member] | 619 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Morrisville, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,031,430
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,655,167
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				748,771
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,031,685
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,403,683
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,435,368			7,435,368
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,349,024			1,349,024
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,435,368
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,349,024
Operating Properties [Member] | 701 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Morrisville, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,300,889
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,313,226
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				208,184
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,301,211
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,521,088
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,822,299			6,822,299
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,261,597			1,261,597
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,822,299
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,261,597
Operating Properties [Member] | 220 Lake Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Newark, DE
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					566,650
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,099,337
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				972,543
Real Estate and Accumulated Depreciation, Carrying Amount of Land					566,650
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,071,880
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,638,530			7,638,530
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 559,650			559,650
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,638,530
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 559,650
Operating Properties [Member] | 222 Lake Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Newark, DE
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,045,238
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,975,553
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				149,013
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,045,238
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,124,565
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,169,803			3,169,803
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 214,673			214,673
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,169,803
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 214,673
Operating Properties [Member] | 10020 South Reinhart Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Oak Creek, WI
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,516,764
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				7,938,332
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,516,764
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,938,332
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 9,455,096			9,455,096
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 17,072			17,072
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 9,455,096
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 17,072
Operating Properties [Member] | 1879 Lamont Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Odenton, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,976,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					8,099,579
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,972,730
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,011,030
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,037,279
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 12,048,309			12,048,309
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,981,242			2,981,242
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 12,048,309
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,981,242
Operating Properties [Member] | 350 Winmeyer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Odenton, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,778,400
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					7,289,165
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,081,514
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,809,927
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					9,339,152
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 11,149,079			11,149,079
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,793,143			2,793,143
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 11,149,079
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,793,143
Operating Properties [Member] | 4000 E Airport Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Ontario, CA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,686,533
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					10,125,772
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				423,090
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,686,533
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,548,862
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 13,235,395			13,235,395
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 796,449			796,449
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 13,235,395
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 796,449
Operating Properties [Member] | 1000 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					415,906
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,826,589
Real Estate and Accumulated Depreciation, Carrying Amount of Land					435,400
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,807,095
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,242,495			3,242,495
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 595,975			595,975
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,242,495
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 595,975
Operating Properties [Member] | 10003 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					680,312
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,120,754
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,371,463
Real Estate and Accumulated Depreciation, Carrying Amount of Land					680,312
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,492,217
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,172,529			4,172,529
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,277,241			1,277,241
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,172,529
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,277,241
Operating Properties [Member] | 10511 & 10611 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					517,554
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,568,186
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				697,018
Real Estate and Accumulated Depreciation, Carrying Amount of Land					522,991
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,259,767
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,782,758			3,782,758
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,498,163			1,498,163
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,782,758
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,498,163
Operating Properties [Member] | 10771 Palm Bay Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					664,605
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,515,652
Real Estate and Accumulated Depreciation, Carrying Amount of Land					685,383
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,494,874
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,180,257			3,180,257
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 835,590			835,590
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,180,257
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 835,590
Operating Properties [Member] | 1090 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					878,320
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,558,833
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,443,203
Real Estate and Accumulated Depreciation, Carrying Amount of Land					878,320
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,002,036
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,880,356			4,880,356
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,246,297			1,246,297
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,880,356
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,246,297
Operating Properties [Member] | 1400-1440 Central Florida Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					518,043
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,561,938
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				966,144
Real Estate and Accumulated Depreciation, Carrying Amount of Land					518,043
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,528,082
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,046,125			4,046,125
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,641,797			1,641,797
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,962
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,046,125
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,641,797
Operating Properties [Member] | 1902 Cypress Lake Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					523,512
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,191,790
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,522,627
Real Estate and Accumulated Depreciation, Carrying Amount of Land					538,512
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,699,417
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,237,929			5,237,929
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,094,870			2,094,870
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,237,929
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,094,870
Operating Properties [Member] | 2000 Park Oaks Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					913,201
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,818,610
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				992,966
Real Estate and Accumulated Depreciation, Carrying Amount of Land					913,201
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,811,576
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,724,777			8,724,777
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 588,768			588,768
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,724,777
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 588,768
Operating Properties [Member] | 2202 Taft-Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,283,713
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				7,315,061
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,283,713
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,315,061
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,598,774			8,598,774
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,716,515			2,716,515
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,598,774
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,716,515
Operating Properties [Member] | 2212 Taft Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					467,296
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,856,683
Real Estate and Accumulated Depreciation, Carrying Amount of Land					825,673
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,498,306
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,323,979			3,323,979
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 765,398			765,398
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,323,979
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 765,398
Operating Properties [Member] | 2256 Taft-Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,261,924
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					7,496,249
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,671,463
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,271,785
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,157,851
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 12,429,636			12,429,636
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,185,561			3,185,561
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 12,429,636
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,185,561
Operating Properties [Member] | 2351 Investors Row [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					385,964
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,218,244
Real Estate and Accumulated Depreciation, Carrying Amount of Land					642,427
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,961,781
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,604,208			3,604,208
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,182,199			1,182,199
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,604,208
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,182,199
Operating Properties [Member] | 2400 South Lake Orange Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,236,819
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,243,314
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,443,586
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,244,667
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,679,052
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,923,719			8,923,719
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 539,257			539,257
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,923,719
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 539,257
Operating Properties [Member] | 2412 Sand Lake Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					535,964
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,830,045
Real Estate and Accumulated Depreciation, Carrying Amount of Land					704,800
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,661,209
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,366,009			4,366,009
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,304,742			1,304,742
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,366,009
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,304,742
Operating Properties [Member] | 2416 Lake Orange Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,435,301
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,174,642
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				738,697
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,435,301
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,913,339
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,348,640			8,348,640
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,847,017			1,847,017
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,348,640
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,847,017
Operating Properties [Member] | 6200 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					903,701
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,673,010
Real Estate and Accumulated Depreciation, Carrying Amount of Land					925,671
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,651,040
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,576,711			6,576,711
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,030,995			2,030,995
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,576,711
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,030,995
Operating Properties [Member] | 6501 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					872,550
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,526,043
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				342,626
Real Estate and Accumulated Depreciation, Carrying Amount of Land					872,550
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,868,669
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,741,219			3,741,219
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 210,997			210,997
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,741,219
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 210,997
Operating Properties [Member] | 6918 Presidents Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					903,701
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,792,659
Real Estate and Accumulated Depreciation, Carrying Amount of Land					830,953
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,865,407
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,696,360			4,696,360
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,131,855			1,131,855
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,696,360
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,131,855
Operating Properties [Member] | 6923 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,443,510
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,775,194
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				557,740
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,457,286
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,319,159
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,776,445			8,776,445
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,760,890			1,760,890
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,776,445
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,760,890
Operating Properties [Member] | 7022 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,431,489
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					8,002,539
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				774,940
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,445,807
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					8,763,161
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 10,208,968			10,208,968
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,132,308			2,132,308
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 10,208,968
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,132,308
Operating Properties [Member] | 7100 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,553,537
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,702,243
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				442,791
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,570,863
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,127,708
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,698,571			7,698,571
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,462,499			1,462,499
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,698,571
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,462,499
Operating Properties [Member] | 7101 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,931,697
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,388,203
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,056,346
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,932,004
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					8,444,242
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 10,376,246			10,376,246
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,444,586			3,444,586
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 10,376,246
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,444,586
Operating Properties [Member] | 7315 Kingspointe Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					332,992
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,818,589
Real Estate and Accumulated Depreciation, Carrying Amount of Land					373,500
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,778,081
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,151,581			3,151,581
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 593,811			593,811
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,010
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,151,581
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 593,811
Operating Properties [Member] | 851 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					443,989
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,909,996
Real Estate and Accumulated Depreciation, Carrying Amount of Land					464,800
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,889,185
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,353,985			3,353,985
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 596,409			596,409
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,353,985
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 596,409
Operating Properties [Member] | 950 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					574,831
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,771,357
Real Estate and Accumulated Depreciation, Carrying Amount of Land					587,319
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,758,869
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,346,188			3,346,188
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,325,625			1,325,625
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,346,188
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,325,625
Operating Properties [Member] | 9550 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					252,850
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,297,923
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				157,434
Real Estate and Accumulated Depreciation, Carrying Amount of Land					252,850
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,455,357
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,708,207			1,708,207
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 624,691			624,691
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,708,207
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 624,691
Operating Properties [Member] | 9600 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					405,362
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,146,546
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				368,173
Real Estate and Accumulated Depreciation, Carrying Amount of Land					405,362
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,514,719
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,920,081			1,920,081
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 659,038			659,038
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,920,081
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 659,038
Operating Properties [Member] | 9700 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					838,853
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,084,540
Real Estate and Accumulated Depreciation, Carrying Amount of Land					767,953
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,155,440
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,923,393			4,923,393
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,181,997			1,181,997
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,923,393
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,181,997
Operating Properties [Member] | 1 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					567,280
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				14,598,919
Real Estate and Accumulated Depreciation, Carrying Amount of Land					347,892
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					14,818,307
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 15,166,199			15,166,199
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,660,239			3,660,239
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 15,166,199
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,660,239
Operating Properties [Member] | 150 Rouse Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					567,531
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				14,015,611
Real Estate and Accumulated Depreciation, Carrying Amount of Land					569,349
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					14,013,793
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 14,583,142			14,583,142
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,346,628			1,346,628
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 14,583,142
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,346,628
Operating Properties [Member] | 201 Rouse Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					243,905
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				22,517,921
Real Estate and Accumulated Depreciation, Carrying Amount of Land					449,013
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					22,312,813
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 22,761,826			22,761,826
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 660,907			660,907
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 22,761,826
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 660,907
Operating Properties [Member] | 3 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					214,726
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				23,121,914
Real Estate and Accumulated Depreciation, Carrying Amount of Land					417,823
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					22,918,817
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 23,336,640			23,336,640
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,843,788			3,843,788
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,008
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 23,336,640
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,843,788
Operating Properties [Member] | 4000 S 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,255,507
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				10,095,284
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,142,358
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,208,433
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 11,350,791			11,350,791
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 53,311			53,311
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 11,350,791
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 53,311
Operating Properties [Member] | 4020 S 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					51,784
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				7,097,969
Real Estate and Accumulated Depreciation, Carrying Amount of Land					616,467
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,533,286
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,149,753			7,149,753
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 632,559			632,559
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,149,753
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 632,559
Operating Properties [Member] | 4050 S 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					46,301
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				7,153,008
Real Estate and Accumulated Depreciation, Carrying Amount of Land					616,670
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,582,639
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,199,309			7,199,309
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 781,536			781,536
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,199,309
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 781,536
Operating Properties [Member] | 4300 South 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					402,673
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				34,847,713
Real Estate and Accumulated Depreciation, Carrying Amount of Land					413,030
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					34,837,356
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 35,250,386			35,250,386
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 5,702,066			5,702,066
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,008
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 35,250,386
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 5,702,066
Operating Properties [Member] | 4751 League Island Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					992,965
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					331,924
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				7,672,123
Real Estate and Accumulated Depreciation, Carrying Amount of Land					613,248
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					8,383,764
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,997,012			8,997,012
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,603,181			2,603,181
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,997,012
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,603,181
Operating Properties [Member] | 4775 League Island Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					891,892
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,534,823
Real Estate and Accumulated Depreciation, Carrying Amount of Land					366,982
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,059,733
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,426,715			6,426,715
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,302,303			1,302,303
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,426,715
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,302,303
Operating Properties [Member] | 5 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,765,341
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				75,115,021
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,897,303
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					74,983,059
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 76,880,362			76,880,362
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 6,019,701			6,019,701
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 76,880,362
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 6,019,701
Operating Properties [Member] | 8th & Walnut Streets [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[1]				41,599,979
Real Estate and Accumulated Depreciation, Initial Cost of Land					734,275
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				45,346,171
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					46,080,446
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 46,080,446			46,080,446
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,419,961			2,419,961
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 46,080,446
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,419,961
Operating Properties [Member] | 2626 South 7th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,519,510
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,798,560
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,444,481
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,519,510
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,243,041
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 9,762,551			9,762,551
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 951,813			951,813
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 9,762,551
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 951,813
Operating Properties [Member] | 4207 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,409,908
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,680,808
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,100,202
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,410,248
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,780,670
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,190,918			7,190,918
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,774,118			1,774,118
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,190,918
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,774,118
Operating Properties [Member] | 4217 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					6,920,980
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					10,045,599
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,757,067
Real Estate and Accumulated Depreciation, Carrying Amount of Land					6,690,321
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					14,033,325
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 20,723,646			20,723,646
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,965,448			3,965,448
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 20,723,646
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,965,448
Operating Properties [Member] | 4303 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,619,964
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					9,675,711
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				43,651
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,619,964
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					9,719,362
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 12,339,326			12,339,326
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,385,757			2,385,757
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 12,339,326
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,385,757
Operating Properties [Member] | 4313 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,895,539
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					16,724,283
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,602,958
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,895,539
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					18,327,241
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 22,222,780			22,222,780
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 4,940,890			4,940,890
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 22,222,780
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 4,940,890
Operating Properties [Member] | 4405 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,646,318
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					9,697,439
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				841,102
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,646,318
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,538,541
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 13,184,859			13,184,859
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,572,185			2,572,185
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 13,184,859
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,572,185
Operating Properties [Member] | 4410 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,758,484
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					10,559,563
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,725,648
Real Estate and Accumulated Depreciation, Carrying Amount of Land					4,765,172
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					14,278,523
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 19,043,695			19,043,695
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,717,243			2,717,243
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 19,043,695
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,717,243
Operating Properties [Member] | 4415 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,749,957
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,667,748
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				465,844
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,749,957
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,133,592
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,883,549			5,883,549
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,165,695			1,165,695
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,883,549
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,165,695
Operating Properties [Member] | 4425 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					7,318,457
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					24,549,401
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				(413,426)
Real Estate and Accumulated Depreciation, Carrying Amount of Land					7,318,457
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					24,135,975
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 31,454,432			31,454,432
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 5,237,323			5,237,323
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 31,454,432
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 5,237,323
Operating Properties [Member] | 4435 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,910,584
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,954,020
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,166,648
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,911,045
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,120,208
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,031,253			6,031,253
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,406,218			1,406,218
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,031,253
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,406,218
Operating Properties [Member] | 4450 South 44th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					5,380,972
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				9,257,593
Real Estate and Accumulated Depreciation, Carrying Amount of Land					6,391,283
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					8,247,282
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 14,638,565			14,638,565
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,761,963			2,761,963
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 14,638,565
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,761,963
Operating Properties [Member] | 4610 South 44th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					6,539,310
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				10,331,533
Real Estate and Accumulated Depreciation, Carrying Amount of Land					6,827,288
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,043,555
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 16,870,843			16,870,843
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,491,474			2,491,474
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 16,870,843
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,491,474
Operating Properties [Member] | 4750 S. 44th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,756,307
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					8,336,400
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				6,213,419
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,761,587
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					14,544,539
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 18,306,126			18,306,126
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,376,591			2,376,591
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 18,306,126
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,376,591
Operating Properties [Member] | 563 South 63rd Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					5,523,427
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					14,581,705
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				12,185,794
Real Estate and Accumulated Depreciation, Carrying Amount of Land					5,636,070
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					26,654,856
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 32,290,926			32,290,926
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,513,535			1,513,535
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 32,290,926
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,513,535
Operating Properties [Member] | 9801 South 51st Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,225,839
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,059,235
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,437,937
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,225,839
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,497,172
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,723,011			5,723,011
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 765,726			765,726
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,723,011
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 765,726
Operating Properties [Member] | Cotton Center Building 18 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					11,222,938
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				15,263,279
Real Estate and Accumulated Depreciation, Carrying Amount of Land					11,318,033
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					15,168,184
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 26,486,217			26,486,217
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,379,031			1,379,031
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 26,486,217
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,379,031
Operating Properties [Member] | 1000 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Plano, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					706,660
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,894,330
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				262,438
Real Estate and Accumulated Depreciation, Carrying Amount of Land					706,660
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,156,769
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,863,429			6,863,429
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 460,973			460,973
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,863,429
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 460,973
Operating Properties [Member] | 1901 10th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Plano, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					555,168
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,401,789
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				483,119
Real Estate and Accumulated Depreciation, Carrying Amount of Land					555,168
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,884,908
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,440,076			7,440,076
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 558,551			558,551
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,440,076
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 558,551
Operating Properties [Member] | 1909 10th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Plano, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					551,706
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,797,440
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				259,234
Real Estate and Accumulated Depreciation, Carrying Amount of Land					551,706
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,056,674
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,608,380			6,608,380
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 466,496			466,496
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,608,380
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 466,496
Operating Properties [Member] | 3605 East Plano Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Plano, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,047,996
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					9,218,748
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,969,523
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,047,996
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					11,188,270
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 12,236,266			12,236,266
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 788,053			788,053
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 12,236,266
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 788,053
Operating Properties [Member] | 3701 East Plano Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Plano, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					877,564
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					7,460,686
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				482,797
Real Estate and Accumulated Depreciation, Carrying Amount of Land					877,564
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,943,482
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,821,046			8,821,046
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 606,978			606,978
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,821,046
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 606,978
Operating Properties [Member] | 800 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Plano, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					580,456
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,681,283
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				288,436
Real Estate and Accumulated Depreciation, Carrying Amount of Land					580,456
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,969,719
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,550,175			6,550,175
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 468,457			468,457
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,550,175
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 468,457
Operating Properties [Member] | 900 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Plano, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					723,534
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,004,923
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				351,565
Real Estate and Accumulated Depreciation, Carrying Amount of Land					723,534
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,356,488
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,080,022			7,080,022
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 521,078			521,078
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,080,022
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 521,078
Operating Properties [Member] | 9801 80th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Pleasant Prairie, WI
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,692,077
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					7,934,794
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				337,903
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,689,726
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					8,275,048
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 9,964,774			9,964,774
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,661,095			3,661,095
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,994
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 9,964,774
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,661,095
Operating Properties [Member] | 14630-14650 28th Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Plymouth, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					198,205
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,793,422
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,096,872
Real Estate and Accumulated Depreciation, Carrying Amount of Land					198,205
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,890,293
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,088,498			3,088,498
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,271,956			1,271,956
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,978
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,088,498
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,271,956
Operating Properties [Member] | 2920 Northwest Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Plymouth, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					392,026
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,433,678
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				695,245
Real Estate and Accumulated Depreciation, Carrying Amount of Land					384,235
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,136,714
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,520,949			4,520,949
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,801,271			1,801,271
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,520,949
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,801,271
Operating Properties [Member] | 5905 Trenton Lane North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Plymouth, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,616,360
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,487,462
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				685,534
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,616,360
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,172,995
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,789,355			6,789,355
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 439,194			439,194
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,789,355
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 439,194
Operating Properties [Member] | 6055 Nathan Lane North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Plymouth, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,327,017
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,527,404
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				535,693
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,327,017
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,063,097
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,390,114			6,390,114
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 436,332			436,332
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,390,114
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 436,332
Operating Properties [Member] | 1400 SW 6th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,157,049
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,620,956
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,339,780
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,157,049
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,960,736
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,117,785			7,117,785
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,562,539			2,562,539
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,986
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,117,785
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,562,539
Operating Properties [Member] | 1405 SW 6th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					392,138
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,565,787
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				456,063
Real Estate and Accumulated Depreciation, Carrying Amount of Land					392,138
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,021,851
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,413,989			2,413,989
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 986,732			986,732
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,413,989
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 986,732
Operating Properties [Member] | 1500 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					972,232
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,892,085
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				672,190
Real Estate and Accumulated Depreciation, Carrying Amount of Land					972,232
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,564,275
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,536,507			5,536,507
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,066,582			2,066,582
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,957
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,536,507
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,066,582
Operating Properties [Member] | 1501 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					203,247
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					811,093
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				368,976
Real Estate and Accumulated Depreciation, Carrying Amount of Land					203,247
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,180,070
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,383,317			1,383,317
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 508,390			508,390
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,383,317
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 508,390
Operating Properties [Member] | 1601 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					203,247
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					811,093
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				203,999
Real Estate and Accumulated Depreciation, Carrying Amount of Land					203,247
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,015,093
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,218,340			1,218,340
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 412,794			412,794
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,218,340
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 412,794
Operating Properties [Member] | 1651 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					203,247
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					811,093
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				183,052
Real Estate and Accumulated Depreciation, Carrying Amount of Land					203,247
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					994,146
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,197,393			1,197,393
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 446,593			446,593
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,197,393
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 446,593
Operating Properties [Member] | 2201-2215 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,120,328
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,427,358
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				104,786
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,120,328
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,532,144
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,652,472			4,652,472
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 266,519			266,519
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,652,472
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 266,519
Operating Properties [Member] | 2250-2270 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					993,015
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,423,174
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				124,260
Real Estate and Accumulated Depreciation, Carrying Amount of Land					993,015
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,547,434
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,540,449			3,540,449
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 197,204			197,204
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,540,449
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 197,204
Operating Properties [Member] | 2280-2300 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					906,947
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,157,802
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				178,320
Real Estate and Accumulated Depreciation, Carrying Amount of Land					906,947
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,336,123
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,243,070			3,243,070
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 195,738			195,738
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,243,070
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 195,738
Operating Properties [Member] | 2301-2329 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,268,707
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,079,811
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				139,490
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,268,707
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,219,301
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,488,008			4,488,008
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 253,100			253,100
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,488,008
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 253,100
Operating Properties [Member] | 3000 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,087,554
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,897,117
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				155,019
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,087,554
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,052,136
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,139,690			4,139,690
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 261,226			261,226
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,139,690
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 261,226
Operating Properties [Member] | 3001-3037 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,548,542
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,512,041
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				307,187
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,548,542
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,819,229
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,367,771			5,367,771
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 336,889			336,889
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,367,771
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 336,889
Operating Properties [Member] | 3012-3050 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,112,781
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,763,862
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				227,204
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,112,781
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,991,065
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,103,846			4,103,846
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 250,248			250,248
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,103,846
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 250,248
Operating Properties [Member] | 595 SW 13th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					359,933
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,437,116
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				720,249
Real Estate and Accumulated Depreciation, Carrying Amount of Land					359,933
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,157,365
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,517,298			2,517,298
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,093,532			1,093,532
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,984
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,517,298
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,093,532
Operating Properties [Member] | 601 SW 13th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					164,413
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					655,933
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				279,326
Real Estate and Accumulated Depreciation, Carrying Amount of Land					164,413
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					935,259
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,099,672			1,099,672
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 491,681			491,681
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,984
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,099,672
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 491,681
Operating Properties [Member] | 605 SW 16th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Pompano Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					310,778
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,238,324
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				464,630
Real Estate and Accumulated Depreciation, Carrying Amount of Land					310,178
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,703,554
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,013,732			2,013,732
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 749,705			749,705
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,965
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,013,732
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 749,705
Operating Properties [Member] | 1920 West Baseline Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Rialto, CA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					9,361,943
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					17,970,709
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				163,942
Real Estate and Accumulated Depreciation, Carrying Amount of Land					9,413,260
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					18,083,334
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 27,496,594			27,496,594
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 511,799			511,799
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 27,496,594
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 511,799
Operating Properties [Member] | 301 Hill Carter Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					659,456
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,836,010
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				159,898
Real Estate and Accumulated Depreciation, Carrying Amount of Land					659,456
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,995,908
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,655,364			5,655,364
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,631,531			2,631,531
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,655,364
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,631,531
Operating Properties [Member] | 4101-4127 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					310,854
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,279,597
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,750,271
Real Estate and Accumulated Depreciation, Carrying Amount of Land					310,854
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,029,868
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,340,722			4,340,722
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,611,732			1,611,732
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,973
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,340,722
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,611,732
Operating Properties [Member] | 4201-4261 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					693,203
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,083,493
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,041,659
Real Estate and Accumulated Depreciation, Carrying Amount of Land					693,203
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,125,152
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,818,355			7,818,355
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,754,522			3,754,522
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,975
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,818,355
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,754,522
Operating Properties [Member] | 4263-4299 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					256,203
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,549,649
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,328,283
Real Estate and Accumulated Depreciation, Carrying Amount of Land					256,203
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,877,932
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,134,135			5,134,135
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,381,870			2,381,870
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,976
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,134,135
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,381,870
Operating Properties [Member] | 4263F-N. Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					91,476
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,897,787
Real Estate and Accumulated Depreciation, Carrying Amount of Land					91,599
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,897,664
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,989,263			1,989,263
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 940,945			940,945
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,975
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,989,263
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 940,945
Operating Properties [Member] | 4301-4335 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					223,696
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,640,435
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,930,093
Real Estate and Accumulated Depreciation, Carrying Amount of Land					223,696
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,570,528
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,794,224			4,794,224
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,818,348			1,818,348
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,978
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,794,224
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,818,348
Operating Properties [Member] | 4337-4379 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					325,303
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,385,557
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,438,114
Real Estate and Accumulated Depreciation, Carrying Amount of Land					325,303
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,823,671
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,148,974			4,148,974
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,099,998			2,099,998
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,979
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,148,974
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,099,998
Operating Properties [Member] | 4401-4445 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					615,038
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,510,272
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				484,686
Real Estate and Accumulated Depreciation, Carrying Amount of Land					615,038
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,994,958
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,609,996			5,609,996
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,615,139			2,615,139
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,609,996
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,615,139
Operating Properties [Member] | 4447-4491 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					454,056
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,729,742
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				514,146
Real Estate and Accumulated Depreciation, Carrying Amount of Land					454,056
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,243,888
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,697,944			3,697,944
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,762,300			1,762,300
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,987
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,697,944
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,762,300
Operating Properties [Member] | 4501-4549 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					486,166
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,565,211
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				576,623
Real Estate and Accumulated Depreciation, Carrying Amount of Land					486,166
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,141,834
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,628,000			4,628,000
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,148,739			2,148,739
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,981
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,628,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,148,739
Operating Properties [Member] | 4551-4593 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					474,360
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,478,646
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,007,798
Real Estate and Accumulated Depreciation, Carrying Amount of Land					474,360
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,486,444
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,960,804			4,960,804
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,462,073			2,462,073
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,982
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,960,804
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,462,073
Operating Properties [Member] | 4601-4643 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					652,455
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,784,675
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				837,239
Real Estate and Accumulated Depreciation, Carrying Amount of Land					652,455
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,621,914
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,274,369			6,274,369
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,133,828			3,133,828
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,274,369
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,133,828
Operating Properties [Member] | 4645-4683 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					404,616
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,967,187
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				575,220
Real Estate and Accumulated Depreciation, Carrying Amount of Land					404,616
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,542,407
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,947,023			3,947,023
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,855,985			1,855,985
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,947,023
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,855,985
Operating Properties [Member] | 4717-4729 Eubank Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					449,447
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,294,697
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,230,770
Real Estate and Accumulated Depreciation, Carrying Amount of Land					452,263
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,522,651
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,974,914			5,974,914
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,752,400			2,752,400
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,978
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,974,914
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,752,400
Operating Properties [Member] | 510 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					261,961
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,110,874
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				384,025
Real Estate and Accumulated Depreciation, Carrying Amount of Land					262,210
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,494,650
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,756,860			2,756,860
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,281,975			1,281,975
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,756,860
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,281,975
Operating Properties [Member] | 520 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					486,118
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,083,582
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				703,776
Real Estate and Accumulated Depreciation, Carrying Amount of Land					486,598
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,786,878
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,273,476			5,273,476
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,206,063			2,206,063
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,273,476
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,206,063
Operating Properties [Member] | 530 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					266,883
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,613,277
Real Estate and Accumulated Depreciation, Carrying Amount of Land					334,772
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,545,388
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,880,160			2,880,160
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,175,333			1,175,333
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,880,160
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,175,333
Operating Properties [Member] | 540 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					742,300
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,428,026
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,066,839
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,103,487
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,170,326			6,170,326
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,030,277			1,030,277
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,170,326
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,030,277
Operating Properties [Member] | 5600-5626 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					489,941
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,592,900
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				622,829
Real Estate and Accumulated Depreciation, Carrying Amount of Land					489,941
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,215,729
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,705,670			4,705,670
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,060,587			2,060,587
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,989
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,705,670
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,060,587
Operating Properties [Member] | 5601-5659 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					705,660
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,829,611
Real Estate and Accumulated Depreciation, Carrying Amount of Land					720,100
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,815,171
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,535,271			5,535,271
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,429,460			2,429,460
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,535,271
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,429,460
Operating Properties [Member] | 5650-5674 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					644,384
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,025,480
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				353,257
Real Estate and Accumulated Depreciation, Carrying Amount of Land					644,384
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,378,737
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,023,121			5,023,121
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,313,416			2,313,416
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,023,121
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,313,416
Operating Properties [Member] | 5700 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					408,729
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,697,348
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				898,269
Real Estate and Accumulated Depreciation, Carrying Amount of Land					408,729
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,595,617
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,004,346			4,004,346
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,030,477			2,030,477
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,004,346
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,030,477
Operating Properties [Member] | 5701-5799 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					694,644
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,983,122
Real Estate and Accumulated Depreciation, Carrying Amount of Land					700,503
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,977,263
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,677,766			6,677,766
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,512,221			2,512,221
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,677,766
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,512,221
Operating Properties [Member] | 5900 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					676,661
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,992,422
Real Estate and Accumulated Depreciation, Carrying Amount of Land					687,898
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,981,185
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,669,083			5,669,083
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,484,030			2,484,030
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,669,083
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,484,030
Operating Properties [Member] | 6000 Eastport Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					872,901
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				7,490,092
Real Estate and Accumulated Depreciation, Carrying Amount of Land					901,666
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,461,327
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,362,993			8,362,993
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,463,596			1,463,596
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,362,993
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,463,596
Operating Properties [Member] | 2020 US Highway 301 South [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Riverview, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,233,639
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					13,608,485
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				341,435
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,233,800
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					13,949,759
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 15,183,559			15,183,559
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,464,544			3,464,544
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 15,183,559
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,464,544
Operating Properties [Member] | 6530 Judge Adams Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Rock Creek, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					305,821
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,966,941
Real Estate and Accumulated Depreciation, Carrying Amount of Land					335,061
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,937,701
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,272,762			5,272,762
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,134,859			2,134,859
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,272,762
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,134,859
Operating Properties [Member] | 6532 Judge Adams Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Rock Creek, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					354,903
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,017,772
Real Estate and Accumulated Depreciation, Carrying Amount of Land					399,988
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,972,687
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,372,675			4,372,675
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,878,277			1,878,277
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,372,675
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,878,277
Operating Properties [Member] | 13098 George Weber Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Rogers, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					895,811
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,004,189
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				321,135
Real Estate and Accumulated Depreciation, Carrying Amount of Land					895,811
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,325,324
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,221,135			7,221,135
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 765,554			765,554
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,221,135
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 765,554
Operating Properties [Member] | 13220 Wilfred Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Rogers, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					508,532
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				11,072,977
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,396,324
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,185,185
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 11,581,509			11,581,509
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 565,894			565,894
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 11,581,509
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 565,894
Operating Properties [Member] | 13225 Brockton Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Rogers, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,048,093
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				10,464,170
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,066,159
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,446,104
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 11,512,263			11,512,263
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 475,964			475,964
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 11,512,263
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 475,964
Operating Properties [Member] | 1070 Windham Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Romeoville, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					8,672,143
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					24,144,864
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,238,550
Real Estate and Accumulated Depreciation, Carrying Amount of Land					8,672,143
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					25,383,414
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 34,055,557			34,055,557
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,952,909			1,952,909
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 34,055,557
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,952,909
Operating Properties [Member] | 1550 Central Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Roselle, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,884,492
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					10,439,793
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				485,780
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,884,492
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,925,573
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 13,810,065			13,810,065
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 937,836			937,836
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 13,810,065
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 937,836
Operating Properties [Member] | 1135 Aviation Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		San Fernando, CA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,035,034
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,844,962
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				460,618
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,035,034
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,305,580
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,340,614			6,340,614
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 264,515			264,515
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,340,614
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 264,515
Operating Properties [Member] | 8715 Bollman Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Savage, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,263,237
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,633,210
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				177,768
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,263,237
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,810,978
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,074,215			4,074,215
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 202,652			202,652
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,074,215
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 202,652
Operating Properties [Member] | 8501 East Raintree Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Scottsdale, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,076,412
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				27,621,159
Real Estate and Accumulated Depreciation, Carrying Amount of Land					4,115,137
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					27,582,434
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 31,697,571			31,697,571
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 8,723,831			8,723,831
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 31,697,571
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 8,723,831
Operating Properties [Member] | 1150 Gateway Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Shakopee, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,126,865
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,684,178
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,603
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,126,865
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,685,781
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,812,646			6,812,646
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 476,739			476,739
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,812,646
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 476,739
Operating Properties [Member] | 5555 12th Avenue East [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Shakopee, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					887,285
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,321,200
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				207,768
Real Estate and Accumulated Depreciation, Carrying Amount of Land					887,285
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,528,968
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,416,253			6,416,253
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 535,233			535,233
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,416,253
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 535,233
Operating Properties [Member] | 5651 Innovation Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Shakopee, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,551,579
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					9,541,234
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				543,939
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,552,083
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,084,669
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 11,636,752			11,636,752
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 32,531			32,531
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 11,636,752
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 32,531
Operating Properties [Member] | 1210 Champion Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Sharonville, OH
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,337,271
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,135,118
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				859,329
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,337,271
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,994,448
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,331,719			8,331,719
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 890,723			890,723
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,331,719
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 890,723
Operating Properties [Member] | 9300 Old Scotland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Shippensburg, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					10,232,633
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				84,544,640
Real Estate and Accumulated Depreciation, Carrying Amount of Land					13,183,027
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					81,594,246
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 94,777,273			94,777,273
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,544,754			3,544,754
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 94,777,273
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,544,754
Operating Properties [Member] | 3990 Heritage Oak Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Simi Valley, CA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,964,140
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					10,667,267
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				332,505
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,964,140
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,999,772
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 12,963,912			12,963,912
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 763,594			763,594
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 12,963,912
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 763,594
Operating Properties [Member] | 3654-3668 Swenson Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		St. Charles, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					643,639
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,645,058
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				149,732
Real Estate and Accumulated Depreciation, Carrying Amount of Land					643,639
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,794,790
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,438,429			2,438,429
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 166,249			166,249
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,438,429
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 166,249
Operating Properties [Member] | 3701 Illinois Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		St. Charles, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					672,500
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,288,924
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				118,858
Real Estate and Accumulated Depreciation, Carrying Amount of Land					672,500
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,407,782
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,080,282			2,080,282
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 143,293			143,293
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,080,282
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 143,293
Operating Properties [Member] | 3950-3980 Swenson Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		St. Charles, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					851,080
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,027,753
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				150,664
Real Estate and Accumulated Depreciation, Carrying Amount of Land					851,080
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,178,417
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,029,497			4,029,497
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 263,862			263,862
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,029,497
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 263,862
Operating Properties [Member] | 1501 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		St. Petersburg, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					283,474
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,230,868
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				165,205
Real Estate and Accumulated Depreciation, Carrying Amount of Land					283,474
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,396,072
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,679,546			2,679,546
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 183,883			183,883
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,679,546
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 183,883
Operating Properties [Member] | 1527 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		St. Petersburg, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					374,284
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,987,226
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				220,944
Real Estate and Accumulated Depreciation, Carrying Amount of Land					374,284
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,208,170
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,582,454			3,582,454
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 244,340			244,340
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,582,454
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 244,340
Operating Properties [Member] | 1551 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		St. Petersburg, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					699,797
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,214,438
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				990,605
Real Estate and Accumulated Depreciation, Carrying Amount of Land					699,797
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,205,043
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,904,840			6,904,840
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 442,736			442,736
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,904,840
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 442,736
Operating Properties [Member] | 6900 Harbor View Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Suffolk, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					904,052
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				8,853,721
Real Estate and Accumulated Depreciation, Carrying Amount of Land					807,006
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					8,950,767
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 9,757,773			9,757,773
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,275,228			2,275,228
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 9,757,773
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,275,228
Operating Properties [Member] | 6920 Harbour View Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Suffolk, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					603,391
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				6,711,340
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,628,635
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,686,096
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,314,731			7,314,731
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 547,431			547,431
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,314,731
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 547,431
Operating Properties [Member] | 6950 Harbour View Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Suffolk, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					929,844
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				6,553,719
Real Estate and Accumulated Depreciation, Carrying Amount of Land					794,848
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,688,715
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,483,563			7,483,563
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,762,445			1,762,445
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,483,563
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,762,445
Operating Properties [Member] | 1516 Fryar Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Sumner, WA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,675,402
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,079,543
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				765,470
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,675,402
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,845,013
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,520,415			7,520,415
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 532,350			532,350
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,520,415
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 532,350
Operating Properties [Member] | 1301 International Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Sunrise, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					5,100,162
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					24,219,956
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				7,580,353
Real Estate and Accumulated Depreciation, Carrying Amount of Land					5,100,791
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					31,799,680
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 36,900,471			36,900,471
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 7,145,549			7,145,549
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 36,900,471
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 7,145,549
Operating Properties [Member] | 13621 NW 12th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Sunrise, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					5,570,820
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					9,454,900
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,331,324
Real Estate and Accumulated Depreciation, Carrying Amount of Land					5,570,820
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,786,224
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 16,357,044			16,357,044
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,276,212			2,276,212
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,008
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 16,357,044
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,276,212
Operating Properties [Member] | 13630 NW 8th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Sunrise, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					659,797
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,596,275
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				464,995
Real Estate and Accumulated Depreciation, Carrying Amount of Land					659,825
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,061,241
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,721,066			3,721,066
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,307,680			1,307,680
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,991
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,721,066
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,307,680
Operating Properties [Member] | 13650 NW 8th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Sunrise, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					558,223
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,171,930
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				321,767
Real Estate and Accumulated Depreciation, Carrying Amount of Land					558,251
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,493,669
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,051,920			3,051,920
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,086,409			1,086,409
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,991
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,051,920
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,086,409
Operating Properties [Member] | 111 Kelsey Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					359,540
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,461,850
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,583,476
Real Estate and Accumulated Depreciation, Carrying Amount of Land					359,540
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,045,326
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,404,866			3,404,866
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,284,683			1,284,683
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,404,866
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,284,683
Operating Properties [Member] | 131 Kelsey Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					511,463
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,437,886
Real Estate and Accumulated Depreciation, Carrying Amount of Land					559,527
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,389,822
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,949,349			4,949,349
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,609,860			2,609,860
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,985
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,949,349
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,609,860
Operating Properties [Member] | 150-182 Kelsey Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					403,541
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,260,899
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,181,609
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,482,831
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,664,440			5,664,440
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,071,959			1,071,959
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,664,440
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,071,959
Operating Properties [Member] | 200-34 Kelsey Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					330,097
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,415,797
Real Estate and Accumulated Depreciation, Carrying Amount of Land					933,362
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,812,532
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,745,894			3,745,894
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 717,312			717,312
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,745,894
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 717,312
Operating Properties [Member] | 3102,3104,3110 Cherry Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					503,767
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,787,585
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,359,333
Real Estate and Accumulated Depreciation, Carrying Amount of Land					503,767
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,146,918
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,650,685			4,650,685
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,152,879			2,152,879
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,986
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,650,685
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,152,879
Operating Properties [Member] | 3401-3409 Cragmont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					556,952
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,849,236
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,060
Real Estate and Accumulated Depreciation, Carrying Amount of Land					556,952
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,853,296
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,410,248			4,410,248
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 301,930			301,930
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,410,248
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 301,930
Operating Properties [Member] | 3502 Roga Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					201,600
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,263,131
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				50,142
Real Estate and Accumulated Depreciation, Carrying Amount of Land					201,600
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,313,273
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,514,873			1,514,873
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 110,882			110,882
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,514,873
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 110,882
Operating Properties [Member] | 3505 Cragmont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					936,336
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					7,155,520
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,313
Real Estate and Accumulated Depreciation, Carrying Amount of Land					936,336
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,156,833
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,093,169			8,093,169
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 614,184			614,184
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,093,169
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 614,184
Operating Properties [Member] | 3608 Queen Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					650,384
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,764,301
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				158,654
Real Estate and Accumulated Depreciation, Carrying Amount of Land					650,384
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,922,955
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,573,339			5,573,339
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 387,097			387,097
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,573,339
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 387,097
Operating Properties [Member] | 4502 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,035,422
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,207,575
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,071,535
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,171,462
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,242,997			4,242,997
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,226,680			1,226,680
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,242,997
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,226,680
Operating Properties [Member] | 4503 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					619,913
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,983,337
Real Estate and Accumulated Depreciation, Carrying Amount of Land					619,913
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,983,337
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,603,250			3,603,250
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 994,644			994,644
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,603,250
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 994,644
Operating Properties [Member] | 4505 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					516,594
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,443,438
Real Estate and Accumulated Depreciation, Carrying Amount of Land					716,594
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,243,438
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,960,032			2,960,032
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 938,891			938,891
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,960,032
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 938,891
Operating Properties [Member] | 4508 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					498,598
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,443,706
Real Estate and Accumulated Depreciation, Carrying Amount of Land					556,887
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,385,417
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,942,304			3,942,304
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,326,867			1,326,867
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,942,304
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,326,867
Operating Properties [Member] | 4511 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					516,594
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,311,508
Real Estate and Accumulated Depreciation, Carrying Amount of Land					686,594
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,141,508
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,828,102			2,828,102
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 793,887			793,887
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,828,102
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 793,887
Operating Properties [Member] | 4520 Seedling Circle [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					854,797
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					42,131
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,773,264
Real Estate and Accumulated Depreciation, Carrying Amount of Land					854,797
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,815,395
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,670,192			3,670,192
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 821,024			821,024
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,003
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,670,192
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 821,024
Operating Properties [Member] | 4630 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					943,169
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				13,996,216
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,560,099
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					13,379,286
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 14,939,385			14,939,385
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 5,534,518			5,534,518
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 14,939,385
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 5,534,518
Operating Properties [Member] | 4631 Woodland Corporate Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,453,367
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				13,936,144
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,908,792
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					13,480,719
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 15,389,511			15,389,511
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,472,756			2,472,756
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 15,389,511
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,472,756
Operating Properties [Member] | 501 US Highway 301 South [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					898,884
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,671,449
Real Estate and Accumulated Depreciation, Carrying Amount of Land					900,508
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,669,825
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,570,333			4,570,333
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,174,725			1,174,725
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,570,333
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,174,725
Operating Properties [Member] | 5250 Eagle Trail Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					952,860
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,661,376
Real Estate and Accumulated Depreciation, Carrying Amount of Land					952,860
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,661,376
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,614,236			4,614,236
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,509,247			1,509,247
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,614,236
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,509,247
Operating Properties [Member] | 5501-5519 Pioneer Park Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					162,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,613,000
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,009,365
Real Estate and Accumulated Depreciation, Carrying Amount of Land					262,416
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,521,949
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,784,365			2,784,365
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,304,741			1,304,741
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,981
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,784,365
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,304,741
Operating Properties [Member] | 5690-5694 Crenshaw Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					181,923
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,812,496
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,023,370
Real Estate and Accumulated Depreciation, Carrying Amount of Land					181,923
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,835,866
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,017,789			3,017,789
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,214,632			1,214,632
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,979
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,017,789
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,214,632
Operating Properties [Member] | 701-725 South US Hwy 301 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					419,683
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,932,756
Real Estate and Accumulated Depreciation, Carrying Amount of Land					661,680
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,690,759
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,352,439			4,352,439
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,561,830			1,561,830
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,352,439
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,561,830
Operating Properties [Member] | 7621 Bald Cypress Place (Bldg N) [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					716,580
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					132,773
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				607,287
Real Estate and Accumulated Depreciation, Carrying Amount of Land					447,498
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,009,142
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,456,640			1,456,640
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 320,478			320,478
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,456,640
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 320,478
Operating Properties [Member] | 7724 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					235,893
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,247,071
Real Estate and Accumulated Depreciation, Carrying Amount of Land					235,894
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,247,070
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,482,964			2,482,964
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 915,541			915,541
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,482,964
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 915,541
Operating Properties [Member] | 7725 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					553,335
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,723,937
Real Estate and Accumulated Depreciation, Carrying Amount of Land					771,501
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,505,771
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,277,272			4,277,272
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,390,660			1,390,660
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,277,272
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,390,660
Operating Properties [Member] | 7802-50 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					357,364
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,073,105
Real Estate and Accumulated Depreciation, Carrying Amount of Land					506,949
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,923,520
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,430,469			3,430,469
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,258,756			1,258,756
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,430,469
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,258,756
Operating Properties [Member] | 7851-7861 Woodland Center Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					548,905
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,241,627
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				291,845
Real Estate and Accumulated Depreciation, Carrying Amount of Land					548,905
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,533,472
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,082,377			3,082,377
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 690,662			690,662
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,082,377
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 690,662
Operating Properties [Member] | 7852-98 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					357,364
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,996,000
Real Estate and Accumulated Depreciation, Carrying Amount of Land					506,949
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,846,415
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,353,364			3,353,364
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,054,718			1,054,718
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,353,364
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,054,718
Operating Properties [Member] | 7920 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,082,648
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,445,444
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				434,554
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,082,648
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,879,998
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,962,646			3,962,646
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,218,548			1,218,548
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,997
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,962,646
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,218,548
Operating Properties [Member] | 7930, 8010-20 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,408,478
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,247,246
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,163,832
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,408,478
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,411,078
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,819,556			7,819,556
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,047,605			3,047,605
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,990
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,819,556
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,047,605
Operating Properties [Member] | 8001 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					350,406
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,455,064
Real Estate and Accumulated Depreciation, Carrying Amount of Land					438,061
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,367,409
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,805,470			2,805,470
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 929,186			929,186
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,999
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,805,470
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 929,186
Operating Properties [Member] | 8110 Anderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					912,663
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,425,143
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				262,407
Real Estate and Accumulated Depreciation, Carrying Amount of Land					912,663
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,687,550
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,600,213			6,600,213
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 500,247			500,247
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,600,213
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 500,247
Operating Properties [Member] | 8112-42 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					513,263
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					3,230,239
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				649,274
Real Estate and Accumulated Depreciation, Carrying Amount of Land					513,263
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,879,513
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,392,776			4,392,776
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,039,535			2,039,535
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,995
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,392,776
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,039,535
Operating Properties [Member] | 8130 Anderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					655,668
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,132,076
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				166,431
Real Estate and Accumulated Depreciation, Carrying Amount of Land					655,668
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,298,507
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,954,175			4,954,175
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 402,947			402,947
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,954,175
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 402,947
Operating Properties [Member] | 8154-8198 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					399,088
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,868,834
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				911,848
Real Estate and Accumulated Depreciation, Carrying Amount of Land					399,088
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,780,682
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,179,770			4,179,770
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,790,357			1,790,357
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,179,770
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,790,357
Operating Properties [Member] | 8212 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					820,882
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,322,720
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				488,717
Real Estate and Accumulated Depreciation, Carrying Amount of Land					820,882
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,811,437
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,632,319			3,632,319
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,140,983			1,140,983
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,632,319
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,140,983
Operating Properties [Member] | 8401-8408 Benjamin Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					789,651
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,454,648
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				575,767
Real Estate and Accumulated Depreciation, Carrying Amount of Land					611,626
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,208,440
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,820,066			5,820,066
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,766,355			2,766,355
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,986
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,820,066
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,766,355
Operating Properties [Member] | 8705 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,303,870
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					23,688,409
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				779,800
Real Estate and Accumulated Depreciation, Carrying Amount of Land					4,304,102
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					24,467,978
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 28,772,080			28,772,080
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 6,695,647			6,695,647
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 28,772,080
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 6,695,647
Operating Properties [Member] | 8715 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,343,910
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					18,325,599
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				514,389
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,344,090
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					18,839,808
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 22,183,898			22,183,898
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 6,024,552			6,024,552
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 22,183,898
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 6,024,552
Operating Properties [Member] | 8725 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,167,787
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					19,126,318
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,003,930
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,167,958
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					20,130,077
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 23,298,035			23,298,035
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 6,006,145			6,006,145
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 23,298,035
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 6,006,145
Operating Properties [Member] | 8735 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,166,130
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					18,735,573
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,292,137
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,166,300
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					20,027,540
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 23,193,840			23,193,840
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 6,018,888			6,018,888
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 23,193,840
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 6,018,888
Operating Properties [Member] | 8745 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,050,439
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					11,173,008
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				505,869
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,050,548
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					11,678,768
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 13,729,316			13,729,316
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,644,718			2,644,718
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 13,729,316
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,644,718
Operating Properties [Member] | 8900-34 Brittany Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					537,194
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,957,804
Real Estate and Accumulated Depreciation, Carrying Amount of Land					978,019
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,516,979
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,494,998			4,494,998
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,088,123			1,088,123
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,494,998
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,088,123
Operating Properties [Member] | 9001-9015 Brittany Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					209,841
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,811,678
Real Estate and Accumulated Depreciation, Carrying Amount of Land					364,514
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,657,005
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,021,519			2,021,519
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 818,366			818,366
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,021,519
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 818,366
Operating Properties [Member] | 9002-9036 Brittany Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					492,320
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,366,767
Real Estate and Accumulated Depreciation, Carrying Amount of Land					899,284
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,959,803
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,859,087			3,859,087
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 909,870			909,870
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,859,087
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 909,870
Operating Properties [Member] | 901-933 US Highway 301 South [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					500,391
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,254,173
Real Estate and Accumulated Depreciation, Carrying Amount of Land					840,314
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,914,250
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,754,564			4,754,564
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,821,995			1,821,995
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,754,564
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,821,995
Operating Properties [Member] | 9020 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,718,496
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					11,697,381
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				912,448
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,718,496
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					12,609,829
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 14,328,325			14,328,325
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 981,612			981,612
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 14,328,325
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 981,612
Operating Properties [Member] | 9110 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,203,200
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					7,979,540
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				99,916
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,203,200
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					8,079,456
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 9,282,656			9,282,656
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 693,067			693,067
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 9,282,656
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 693,067
Operating Properties [Member] | 9203 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					754,832
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,966,864
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				92,249
Real Estate and Accumulated Depreciation, Carrying Amount of Land					754,832
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,059,113
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,813,945			5,813,945
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 577,865			577,865
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,813,945
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 577,865
Operating Properties [Member] | 9306-24 East Broadway Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					450,440
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,303,369
Real Estate and Accumulated Depreciation, Carrying Amount of Land					486,004
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,267,805
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,753,809			3,753,809
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 651,502			651,502
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,753,809
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 651,502
Operating Properties [Member] | 9319 Peach Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					612,536
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,168,473
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				9,700
Real Estate and Accumulated Depreciation, Carrying Amount of Land					612,536
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,178,173
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,790,709			4,790,709
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 334,320			334,320
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,790,709
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 334,320
Operating Properties [Member] | 9704 Solar Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					374,548
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,354,800
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				140,998
Real Estate and Accumulated Depreciation, Carrying Amount of Land					374,548
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,495,798
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,870,346			1,870,346
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 125,032			125,032
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,870,346
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 125,032
Operating Properties [Member] | 9945 Currie Davis Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,134,286
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					9,241,807
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				380,833
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,134,286
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					9,622,639
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 10,756,925			10,756,925
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 732,977			732,977
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 10,756,925
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 732,977
Operating Properties [Member] | 1720 W Rio Salado Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tempe, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,629,020
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				15,771,140
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,629,020
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					15,771,140
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 18,400,160			18,400,160
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 93,842			93,842
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 18,400,160
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 93,842
Operating Properties [Member] | 1850 W Rio Salado Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tempe, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,975,600
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				23,047,658
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,975,600
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					23,047,658
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 27,023,258			27,023,258
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 204,220			204,220
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 27,023,258
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 204,220
Operating Properties [Member] | 1858 E Encanto Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tempe, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					877,611
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					4,485,427
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				256,266
Real Estate and Accumulated Depreciation, Carrying Amount of Land					877,611
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					4,741,693
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,619,304			5,619,304
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 385,935			385,935
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,619,304
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 385,935
Operating Properties [Member] | 475 W Vaughn St [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tempe, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,112,245
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,260,348
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				134,556
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,112,245
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,394,904
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,507,149			3,507,149
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 226,546			226,546
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,507,149
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 226,546
Operating Properties [Member] | 921 South Park Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tempe, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,192,820
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,580,155
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				481,037
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,192,820
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,061,193
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,254,013			3,254,013
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 300,746			300,746
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,254,013
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 300,746
Operating Properties [Member] | 8313 West Pierce Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tolleson, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,295,090
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					9,079,811
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,240,140
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,295,090
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					12,319,951
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 14,615,041			14,615,041
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,521,569			3,521,569
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 14,615,041
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,521,569
Operating Properties [Member] | 8591 West Washington [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tolleson, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,574,912
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					7,308,021
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				277,291
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,574,912
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,585,312
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 9,160,224			9,160,224
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 768,598			768,598
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 9,160,224
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 768,598
Operating Properties [Member] | 8601 West Washington [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tolleson, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,524,603
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,352,070
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				919,846
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,524,603
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,271,916
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,796,519			8,796,519
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 885,845			885,845
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,796,519
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 885,845
Operating Properties [Member] | 5111 S Royal Atlanta Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tucker, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					435,776
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,875,685
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				372,752
Real Estate and Accumulated Depreciation, Carrying Amount of Land					435,776
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,248,438
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,684,214			2,684,214
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 235,227			235,227
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,684,214
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 235,227
Operating Properties [Member] | 5151 S Royal Atlanta Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tucker, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					345,061
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,428,840
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				203,538
Real Estate and Accumulated Depreciation, Carrying Amount of Land					345,061
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,632,378
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,977,439			1,977,439
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 192,918			192,918
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,977,439
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 192,918
Operating Properties [Member] | 1100 17th Street NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Washington, DC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					16,558,660
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					32,223,978
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,469,287
Real Estate and Accumulated Depreciation, Carrying Amount of Land					16,558,660
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					33,693,265
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 50,251,925			50,251,925
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 5,441,896			5,441,896
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 50,251,925
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 5,441,896
Operating Properties [Member] | 2100 M Street NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Washington, DC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					70,000,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					55,123,783
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				128,506
Real Estate and Accumulated Depreciation, Carrying Amount of Land					70,000,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					55,252,289
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 125,252,289			125,252,289
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 5,781,074			5,781,074
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 125,252,289
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 5,781,074
Operating Properties [Member] | 1200 Liberty Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Wayne, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					6,215,667
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				8,912,626
Real Estate and Accumulated Depreciation, Carrying Amount of Land					5,223,660
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					9,904,633
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 15,128,293			15,128,293
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 4,241,802			4,241,802
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 15,128,293
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 4,241,802
Operating Properties [Member] | 1500 Liberty Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Wayne, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					8,287,555
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				32,326,215
Real Estate and Accumulated Depreciation, Carrying Amount of Land					11,636,499
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					28,977,271
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 40,613,770			40,613,770
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 10,604,538			10,604,538
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,002
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 40,613,770
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 10,604,538
Operating Properties [Member] | 825 Duportail Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Wayne, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					5,536,619
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					16,179,213
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,014,199
Real Estate and Accumulated Depreciation, Carrying Amount of Land					5,539,281
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					21,190,750
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 26,730,031			26,730,031
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 9,267,683			9,267,683
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,979
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 26,730,031
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 9,267,683
Operating Properties [Member] | 400-500 Brandywine Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		West Chester, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					845,846
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					6,809,025
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,041,424
Real Estate and Accumulated Depreciation, Carrying Amount of Land					845,846
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,850,449
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,696,295			8,696,295
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 3,246,127			3,246,127
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,696,295
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 3,246,127
Operating Properties [Member] | 600 Brandywine Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		West Chester, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					664,899
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,352,410
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				892,306
Real Estate and Accumulated Depreciation, Carrying Amount of Land					664,899
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,244,716
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,909,615			6,909,615
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,927,132			2,927,132
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,988
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,909,615
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,927,132
Operating Properties [Member] | 1400 Powis Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		West Chicago, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					578,314
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,448,562
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				73,377
Real Estate and Accumulated Depreciation, Carrying Amount of Land					578,314
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,521,939
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,100,253			3,100,253
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 178,750			178,750
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,100,253
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 178,750
Operating Properties [Member] | 1 Kings Hill Aveune [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		West Malling, UK
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,288,389
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				9,037,845
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,687,334
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					9,638,900
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 13,326,234			13,326,234
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,389,026			2,389,026
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 13,326,234
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,389,026
Operating Properties [Member] | 42 Kings Hill Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		West Malling, UK
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					5,397,739
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				11,517,219
Real Estate and Accumulated Depreciation, Carrying Amount of Land					4,003,074
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					12,911,884
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 16,914,958			16,914,958
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 2,766,912			2,766,912
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 16,914,958
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 2,766,912
Operating Properties [Member] | Liberty Square, Block 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		West Malling, UK
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					159,232
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,622,551
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				904,781
Real Estate and Accumulated Depreciation, Carrying Amount of Land					301,735
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,384,830
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,686,565			2,686,565
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 641,950			641,950
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,686,565
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 641,950
Operating Properties [Member] | Liberty Square, Block 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		West Malling, UK
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					199,150
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,614,217
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				936,652
Real Estate and Accumulated Depreciation, Carrying Amount of Land					377,377
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,372,642
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,750,019			2,750,019
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 615,641			615,641
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,750,019
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 615,641
Operating Properties [Member] | Liberty Square, Block 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		West Malling, UK
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					129,830
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,141,141
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				652,344
Real Estate and Accumulated Depreciation, Carrying Amount of Land					246,020
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,677,295
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,923,315			1,923,315
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 430,653			430,653
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,923,315
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 430,653
Operating Properties [Member] | Liberty Square, Block 5 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		West Malling, UK
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					71,377
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					735,993
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				409,677
Real Estate and Accumulated Depreciation, Carrying Amount of Land					135,255
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,081,792
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,217,047			1,217,047
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 279,593			279,593
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,217,047
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 279,593
Operating Properties [Member] | 1400 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		West Palm Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,454,972
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					5,312,829
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				276,502
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,454,972
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,589,331
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,044,303			8,044,303
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 500,926			500,926
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,044,303
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 500,926
Operating Properties [Member] | 300 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		West Palm Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,177,064
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,102,451
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				136,689
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,177,064
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,239,140
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,416,204			3,416,204
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 191,870			191,870
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,416,204
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 191,870
Operating Properties [Member] | 400 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		West Palm Beach, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,029,595
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					1,728,187
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				164,118
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,029,595
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,892,305
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,921,900			2,921,900
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 164,308			164,308
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,921,900
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 164,308
Operating Properties [Member] | 2935 West Corporate Lakes Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Weston, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,682,521
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					25,905,126
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				558,332
Real Estate and Accumulated Depreciation, Carrying Amount of Land					4,682,521
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					26,463,458
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 31,145,979			31,145,979
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,739,999			1,739,999
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 31,145,979
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,739,999
Operating Properties [Member] | 2945 West Corporate Lakes Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Weston, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[3]				0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,345,242
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					13,973,766
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				273,455
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,345,242
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					14,247,221
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 16,592,463			16,592,463
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 925,347			925,347
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 16,592,463
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 925,347
Operating Properties [Member] | 43-47 Hintz Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Wheeling, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,051,093
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					18,283,480
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				537,830
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,051,088
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					18,821,316
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 20,872,404			20,872,404
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 1,304,019			1,304,019
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 20,872,404
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		1,304,019
Operating Properties [Member] | Subtotal Operating Real Estate [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	[1]				55,484,649
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,114,603,612
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					2,652,302,317
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,549,669,062
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,184,927,226
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,131,647,765
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		6,316,574,991			6,316,574,991
Real Estate and Accumulated Depreciation, Accumulated Depreciation		1,148,928,324			1,148,928,324
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		6,316,574,991
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 1,148,928,324
Operating Properties [Member] | Maximum [Member] | 627 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1467 Perryman Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1501 Perryman Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 869 S Route 53 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 901 S Route 53 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 200 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 250 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 400 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 650 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 651 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 700 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 705 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7165 Ambassador Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7248 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7339 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7437 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8014 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8150 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8250 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8400 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6330 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6350 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6370 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6390 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6520 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6540 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6560 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6580 Snowdrift Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7620 Cetronia Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3095 Presidential Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3097 Presidential Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7030 Buford Highway NE [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | Barton 150 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1055-1071 Kingsland Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4606 Richlynn Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 11800 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 11850 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 11900 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 12104 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 12200 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 12240 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1071 Thorndale Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1260-1274 Ellis Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 371-377 Meyer Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 850-880 Devon Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 10 Emery Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2785 Commerce Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 74 West Broad Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 10801 Nesbitt Avenue South [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5705 Old Shakopee Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5715 Old Shakopee Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5735 Old Shakopee Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5775 West Old Shakopee Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6161 Green Valley Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6601-6625 W. 78th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 750 Park of Commerce Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 777 Yamato Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 951 Broken Sound Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1455 Remington Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 150 E Crossroads Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 553 S Joliet Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 400 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8201 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8500 Industrial Bouldvard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 860 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1485 W Commerce Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 40 Logistics Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 135-195 East Elk Trail [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 515 Kehoe Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1413 Bradley Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3200 Belmeade Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1475 Nitterhouse Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 95 Kriner Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 9000 109th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 11701 Goodrich Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 12810 Virkler Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2700 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2701 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2730 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2801 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3000 Crosspoint Center Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3005 Crosspoint Center Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4045 Perimeter West Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4047 Perimeter West Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4525 Statesville Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4835 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4925 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5033 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5039 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8910 Pioneer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8916 Pioneer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2601 Indian River Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1540 S 54th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4650 Lake Forest Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4750 Lake Forest Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 9645 Gerwig Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2550 John Glenn Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3800 Twin Creeks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 330 South Royal Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 455 Airline Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2130 Baldwin Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 329-333 Herrod Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1250 Hall Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 301-321 S Goolsby Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1680 Executive Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1700 Executive Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2670 Breckinridge Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 170 Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 190 Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 265 Parkway East [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 285 Parkway East [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1000 Parliament Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4226 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4227 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4234 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4300 Emperor Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3169 Dodd Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3711 Kennebec Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 917 Lone Oak Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 10301-10305 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 10321 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 10333 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 10349-10357 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 10365-10375 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 10393-10394 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 10400 Viking Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7075 Flying Cloud Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7078 Shady Oak Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7615 Smetana Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7625 Smetana Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7695-7699 Anagram Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7777 Golden Triangle Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7800 Equitable Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7905 Fuller Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8855 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8911 Columbine Road (B2) [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8937 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8967 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8995 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 9023 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2250 Arthur Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6600 Business Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6675 Business Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7351 Coca Cola Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 21705-21707 Mississippi Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 27143 S Baseline Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1800 Donaldson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 180 Sheree Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6880 Fairfield Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7000-7018 Fairfield Business [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 10721 Jasmine Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2000 Southpointe Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1400 NW 65th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6500 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6501 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6600 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5400 Alliance Gateway Freeway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 9601 Cosner Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5410 - 5430 Northwest 33rd Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 12601 Industry Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 12641 Industry Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 12681-12691 Pala Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 850 S Jupiter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2510 W Main Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4251 North Highway 121 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 116 Pleasant Ridge Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 25 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 45 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2011 Southtech Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2121 Southtech Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 800 Commerce Parkway West Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 110 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 140 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1487 South Highway 101 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2727 London Grove Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 11835 Newgate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 11841 Newgate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1560 Hunter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1575 Hunter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7361 Coca Cola Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7460 New Ridge Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7462 New Ridge Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 500 McCarthy Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 600 Industrial Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7195 Grayson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7253 Grayson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 12537 Cerise Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1010 Petersburg Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 785 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 805 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 825 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 845 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1498 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4183 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4189 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4195 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4328, 4336 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4344 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4380 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4388 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4475 Premier Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4500 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4501 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4523 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4524 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | Unit 5 Logix Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1515 6th Street South [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1600 5th Street South [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1000 South Loop West [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 10241 W Little York Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 10245 W Little York Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 10301 Round Up Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 10305 Round Up Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1050 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 10607 Haddington Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 10735 West Little York Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 10739 West Little York Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 11201 Greens Crossing Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 11220 Ella Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1283 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1287 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1291 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1416 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1420 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 14200 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1424 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1428 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 14300 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 14400 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 15102 Sommermeyer St [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 15150 Sommermeyer St [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 16330 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 16405 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 16420 West Hardy Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 16445 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1646 Rankin Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1655 Townhurst Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 16580 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 16602 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 16605 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1665 Townhurst Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 16680 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 16685 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1755 Trans Central Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4301 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4401 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4501 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5200 N. Sam Houston Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5250 N. Sam Houston Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5500 N. Sam Houston Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8017 Pinemont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8272 El Rio Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8282 El Rio Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8301 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8303 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 850 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 860 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8801-19 & 8821-49 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8802-8824 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8825-8839 N Sam Houston Pkwy [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8850-8872 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | Liberty 11 at Central Green [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | Cabot III UK1B01 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1011 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1035 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1549 W Glenlake Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 901 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 925 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8241 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8242 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8246 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1305 Chastain Road NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1325 Chastain Road NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3600 Cobb International Bld NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | Unit 1 Bear Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 151 South Warner Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2100 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2201 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2300 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2301 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2500 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2520 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2560 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2700 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2900 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3000 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3100 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3200 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3400 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3500 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3600 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3602 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3604 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 440 East Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 460 East Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 650 Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 680 Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1700 Interstate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5801 Columbia Park Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 11425 State Highway 225 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 11503 State Highway 225 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1701 South 16th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1842 South 16th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1902 South 16th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 640 S State Road 39 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7528 Walker Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8301 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8500 Willard Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 875 Maxham Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7533 Industrial Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1 Country View Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 10 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 10, 20 Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 100 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1001 Cedar Hollow Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 11 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 11,15 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 12,14,16 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 14 Lee Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 155 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 18 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2 West Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 20 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 200 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 257-275 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 27-43 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 277-293 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3 Country View Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 30 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 300 Technology Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 300-400 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 311 Technology Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 333 Phoenixville Pike [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 40 Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 40 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 420 Lapp Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 425 Old Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 425 Technology Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 45 Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 45-67 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 50 Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 50 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 500 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 508 Lapp Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 510 Lapp Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 55 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 60 Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 600 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 65 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 700 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 75 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 77-123 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1169 Canton Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 65 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 75 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 126-132 Liberty Industrial Pkw [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 95-115 Liberty Industrial Pkwy [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 11150 NW 122nd Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 11401 NW 134th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 11450 NW 122nd Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 12501 & 12701 Whitewater Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 12800 Whitewater Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 12900 Whitewater Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 456 International Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3100 SW 145th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3350 SW 148th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3400 Lakeside Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3450 Lakeside Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 21 S Middlesex Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4 S Middlesex Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 22750 Cactus Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 323 Park Knoll Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 324 Park Knoll Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 619 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 701 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 220 Lake Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 222 Lake Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 10020 South Reinhart Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1879 Lamont Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 350 Winmeyer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4000 E Airport Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1000 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 10003 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 10511 & 10611 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 10771 Palm Bay Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1090 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1400-1440 Central Florida Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1902 Cypress Lake Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2000 Park Oaks Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2202 Taft-Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2212 Taft Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2256 Taft-Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2351 Investors Row [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2400 South Lake Orange Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2412 Sand Lake Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2416 Lake Orange Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6200 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6501 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6918 Presidents Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6923 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7022 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7100 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7101 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7315 Kingspointe Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 851 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 950 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 9550 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 9600 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 9700 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 150 Rouse Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 201 Rouse Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4000 S 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4050 S 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4300 South 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4751 League Island Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4775 League Island Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8th & Walnut Streets [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2626 South 7th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4207 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4217 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4303 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4313 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4405 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4410 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4415 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4425 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4435 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4450 South 44th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4610 South 44th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4750 S. 44th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 563 South 63rd Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 9801 South 51st Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | Cotton Center Building 18 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1000 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1901 10th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1909 10th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3605 East Plano Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3701 East Plano Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 800 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 900 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 9801 80th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 14630-14650 28th Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2920 Northwest Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5905 Trenton Lane North [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6055 Nathan Lane North [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1400 SW 6th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1405 SW 6th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1500 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1501 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1601 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1651 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2201-2215 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2250-2270 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2280-2300 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2301-2329 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3000 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3001-3037 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3012-3050 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 595 SW 13th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 601 SW 13th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 605 SW 16th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1920 West Baseline Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 301 Hill Carter Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4101-4127 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4201-4261 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4263-4299 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4263F-N. Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4301-4335 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4337-4379 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4401-4445 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4447-4491 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4501-4549 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4551-4593 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4601-4643 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4645-4683 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4717-4729 Eubank Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 510 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 520 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 530 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 540 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5600-5626 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5601-5659 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5650-5674 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5700 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5701-5799 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5900 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6000 Eastport Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2020 US Highway 301 South [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6530 Judge Adams Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6532 Judge Adams Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 13098 George Weber Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 13220 Wilfred Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 13225 Brockton Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1070 Windham Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1550 Central Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1135 Aviation Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8715 Bollman Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8501 East Raintree Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1150 Gateway Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5555 12th Avenue East [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5651 Innovation Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1210 Champion Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 9300 Old Scotland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3990 Heritage Oak Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3654-3668 Swenson Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3701 Illinois Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3950-3980 Swenson Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1501 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1527 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1551 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6900 Harbor View Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6920 Harbour View Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 6950 Harbour View Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1516 Fryar Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1301 International Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 13621 NW 12th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 13630 NW 8th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 13650 NW 8th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 111 Kelsey Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 131 Kelsey Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 150-182 Kelsey Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 200-34 Kelsey Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3102,3104,3110 Cherry Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3401-3409 Cragmont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3502 Roga Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3505 Cragmont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 3608 Queen Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4502 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4503 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4505 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4508 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4511 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4520 Seedling Circle [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4630 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 4631 Woodland Corporate Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 501 US Highway 301 South [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5250 Eagle Trail Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5501-5519 Pioneer Park Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5690-5694 Crenshaw Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 701-725 South US Hwy 301 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7621 Bald Cypress Place (Bldg N) [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7724 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7725 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7802-50 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7851-7861 Woodland Center Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7852-98 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7920 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 7930, 8010-20 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8001 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8110 Anderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8112-42 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8130 Anderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8154-8198 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8212 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8401-8408 Benjamin Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8705 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8715 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8725 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8735 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8745 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8900-34 Brittany Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 9001-9015 Brittany Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 9002-9036 Brittany Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 901-933 US Highway 301 South [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 9020 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 9110 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 9203 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 9306-24 East Broadway Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 9319 Peach Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 9704 Solar Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 9945 Currie Davis Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1720 W Rio Salado Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1850 W Rio Salado Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1858 E Encanto Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 475 W Vaughn St [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 921 South Park Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8313 West Pierce Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8591 West Washington [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 8601 West Washington [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5111 S Royal Atlanta Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 5151 S Royal Atlanta Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1100 17th Street NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2100 M Street NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1200 Liberty Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1500 Liberty Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 825 Duportail Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 400-500 Brandywine Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 600 Brandywine Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1400 Powis Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1 Kings Hill Aveune [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 42 Kings Hill Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | Liberty Square, Block 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | Liberty Square, Block 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | Liberty Square, Block 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | Liberty Square, Block 5 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 1400 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 300 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 400 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2935 West Corporate Lakes Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 2945 West Corporate Lakes Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Maximum [Member] | 43-47 Hintz Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		40 years
Operating Properties [Member] | Minimum [Member] | 627 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1467 Perryman Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1501 Perryman Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 869 S Route 53 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 901 S Route 53 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 200 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 250 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 400 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 650 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 651 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 700 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 705 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7165 Ambassador Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7248 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7339 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7437 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8014 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8150 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8250 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8400 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6330 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6350 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6370 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6390 Hedgewood Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6520 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6540 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6560 Stonegate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6580 Snowdrift Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7620 Cetronia Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3095 Presidential Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3097 Presidential Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7030 Buford Highway NE [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | Barton 150 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1055-1071 Kingsland Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4606 Richlynn Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 11800 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 11850 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 11900 Baltimore Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 12104 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 12200 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 12240 Indian Creek Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1071 Thorndale Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1260-1274 Ellis Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 371-377 Meyer Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 850-880 Devon Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 10 Emery Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2785 Commerce Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 74 West Broad Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 10801 Nesbitt Avenue South [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5705 Old Shakopee Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5715 Old Shakopee Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5735 Old Shakopee Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5775 West Old Shakopee Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6161 Green Valley Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6601-6625 W. 78th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 750 Park of Commerce Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 777 Yamato Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 951 Broken Sound Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1455 Remington Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 150 E Crossroads Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 553 S Joliet Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 400 Boulder Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8201 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8500 Industrial Bouldvard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 860 Nestle Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1485 W Commerce Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 40 Logistics Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 135-195 East Elk Trail [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 515 Kehoe Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1413 Bradley Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3200 Belmeade Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1475 Nitterhouse Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 95 Kriner Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 9000 109th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 11701 Goodrich Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 12810 Virkler Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2700 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2701 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2730 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2801 Hutchinson McDonald Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3000 Crosspoint Center Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3005 Crosspoint Center Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4045 Perimeter West Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4047 Perimeter West Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4525 Statesville Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4835 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4925 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5033 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5039 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8910 Pioneer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8916 Pioneer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2601 Indian River Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1540 S 54th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4650 Lake Forest Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4750 Lake Forest Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 9645 Gerwig Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2550 John Glenn Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3800 Twin Creeks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 330 South Royal Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 455 Airline Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2130 Baldwin Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 329-333 Herrod Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1250 Hall Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 301-321 S Goolsby Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1680 Executive Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1700 Executive Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2670 Breckinridge Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 170 Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 190 Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 265 Parkway East [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 285 Parkway East [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1000 Parliament Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4226 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4227 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4234 Surles Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4300 Emperor Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3169 Dodd Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3711 Kennebec Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 917 Lone Oak Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 10301-10305 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 10321 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 10333 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 10349-10357 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 10365-10375 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 10393-10394 West 70th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 10400 Viking Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7075 Flying Cloud Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7078 Shady Oak Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7615 Smetana Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7625 Smetana Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7695-7699 Anagram Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7777 Golden Triangle Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7800 Equitable Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7905 Fuller Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8855 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8911 Columbine Road (B2) [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8937 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8967 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8995 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 9023 Columbine Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2250 Arthur Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6600 Business Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6675 Business Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7351 Coca Cola Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 21705-21707 Mississippi Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 27143 S Baseline Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1800 Donaldson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 180 Sheree Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6880 Fairfield Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7000-7018 Fairfield Business [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 10721 Jasmine Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2000 Southpointe Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1400 NW 65th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6500 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6501 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6600 NW 12th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5400 Alliance Gateway Freeway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 9601 Cosner Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5410 - 5430 Northwest 33rd Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 12601 Industry Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 12641 Industry Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 12681-12691 Pala Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 850 S Jupiter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2510 W Main Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4251 North Highway 121 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 116 Pleasant Ridge Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 25 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 45 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2011 Southtech Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2121 Southtech Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 800 Commerce Parkway West Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 110 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 140 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1487 South Highway 101 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2727 London Grove Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 11835 Newgate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 11841 Newgate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1560 Hunter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1575 Hunter Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7361 Coca Cola Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7460 New Ridge Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7462 New Ridge Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 500 McCarthy Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 600 Industrial Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7195 Grayson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7253 Grayson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 12537 Cerise Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1010 Petersburg Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 785 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 805 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 825 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 845 Lindbergh Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1498 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4183 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4189 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4195 Eagle Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4328, 4336 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4344 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4380 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4388 Federal Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4475 Premier Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4500 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4501 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4523 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4524 Green Point Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | Unit 5 Logix Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1515 6th Street South [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1600 5th Street South [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1000 South Loop West [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 10241 W Little York Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 10245 W Little York Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 10301 Round Up Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 10305 Round Up Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1050 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 10607 Haddington Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 10735 West Little York Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 10739 West Little York Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 11201 Greens Crossing Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 11220 Ella Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1283 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1287 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1291 N Post Oak Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1416 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1420 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 14200 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1424 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1428 N Sam Houston Parkway E [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 14300 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 14400 Hollister Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 15102 Sommermeyer St [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 15150 Sommermeyer St [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 16330 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 16405 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 16420 West Hardy Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 16445 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1646 Rankin Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1655 Townhurst Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 16580 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 16602 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 16605 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1665 Townhurst Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 16680 Central Green Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 16685 Air Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1755 Trans Central Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4301 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4401 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4501 S Pinemont Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5200 N. Sam Houston Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5250 N. Sam Houston Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5500 N. Sam Houston Parkway West [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8017 Pinemont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8272 El Rio Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8282 El Rio Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8301 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8303 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 850 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 860 Greens Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8801-19 & 8821-49 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8802-8824 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8825-8839 N Sam Houston Pkwy [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8850-8872 Fallbrook Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | Liberty 11 at Central Green [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | Cabot III UK1B01 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1011 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1035 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1549 W Glenlake Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 901 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 925 N Hilltop Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8241 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8242 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8246 Sandy Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1305 Chastain Road NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1325 Chastain Road NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3600 Cobb International Bld NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | Unit 1 Bear Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 151 South Warner Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2100 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2201 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2300 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2301 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2500 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2520 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2560 Renaissance Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2700 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2900 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3000 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3100 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3200 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3400 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3500 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3600 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3602 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3604 Horizon Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 440 East Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 460 East Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 650 Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 680 Swedesford Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1700 Interstate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5801 Columbia Park Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 11425 State Highway 225 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 11503 State Highway 225 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1701 South 16th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1842 South 16th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1902 South 16th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 640 S State Road 39 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7528 Walker Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8301 Industrial Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8500 Willard Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 875 Maxham Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7533 Industrial Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1 Country View Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 10 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 10, 20 Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 100 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1001 Cedar Hollow Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 11 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 11,15 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 12,14,16 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 14 Lee Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 155 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 18 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2 West Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 20 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 200 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 257-275 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 27-43 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 277-293 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3 Country View Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 30 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 300 Technology Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 300-400 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 311 Technology Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 333 Phoenixville Pike [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 40 Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 40 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 420 Lapp Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 425 Old Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 425 Technology Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 45 Liberty Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 45-67 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 50 Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 50 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 500 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 508 Lapp Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 510 Lapp Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 55 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 60 Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 600 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 65 Valley Stream Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 700 Chesterfield Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 75 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 77-123 Great Valley Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1169 Canton Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 65 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 75 Brookfield Oaks Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 126-132 Liberty Industrial Pkw [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 95-115 Liberty Industrial Pkwy [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 11150 NW 122nd Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 11401 NW 134th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 11450 NW 122nd Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 12501 & 12701 Whitewater Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 12800 Whitewater Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 12900 Whitewater Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 456 International Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3100 SW 145th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3350 SW 148th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3400 Lakeside Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3450 Lakeside Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 21 S Middlesex Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4 S Middlesex Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 22750 Cactus Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 323 Park Knoll Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 324 Park Knoll Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 619 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 701 Distribution Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 220 Lake Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 222 Lake Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 10020 South Reinhart Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1879 Lamont Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 350 Winmeyer Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4000 E Airport Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1000 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 10003 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 10511 & 10611 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 10771 Palm Bay Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1090 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1400-1440 Central Florida Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1902 Cypress Lake Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2000 Park Oaks Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2202 Taft-Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2212 Taft Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2256 Taft-Vineland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2351 Investors Row [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2400 South Lake Orange Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2412 Sand Lake Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2416 Lake Orange Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6200 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6501 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6918 Presidents Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6923 Lee Vista Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7022 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7100 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7101 TPC Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7315 Kingspointe Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 851 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 950 Gills Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 9550 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 9600 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 9700 Satellite Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 150 Rouse Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 201 Rouse Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4000 S 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4050 S 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4300 South 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4751 League Island Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4775 League Island Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5 Crescent Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8th & Walnut Streets [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2626 South 7th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4207 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4217 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4303 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4313 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4405 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4410 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4415 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4425 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4435 E. Cotton Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4450 South 44th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4610 South 44th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4750 S. 44th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 563 South 63rd Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 9801 South 51st Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | Cotton Center Building 18 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1000 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1901 10th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1909 10th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3605 East Plano Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3701 East Plano Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 800 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 900 Klein Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 9801 80th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 14630-14650 28th Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2920 Northwest Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5905 Trenton Lane North [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6055 Nathan Lane North [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1400 SW 6th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1405 SW 6th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1500 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1501 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1601 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1651 SW 5th Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2201-2215 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2250-2270 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2280-2300 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2301-2329 NW 30th Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3000 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3001-3037 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3012-3050 NW 25th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 595 SW 13th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 601 SW 13th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 605 SW 16th Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1920 West Baseline Rd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 301 Hill Carter Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4101-4127 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4201-4261 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4263-4299 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4263F-N. Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4301-4335 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4337-4379 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4401-4445 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4447-4491 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4501-4549 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4551-4593 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4601-4643 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4645-4683 Carolina Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4717-4729 Eubank Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 510 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 520 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 530 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 540 Eastpark Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5600-5626 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5601-5659 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5650-5674 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5700 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5701-5799 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5900 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6000 Eastport Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2020 US Highway 301 South [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6530 Judge Adams Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6532 Judge Adams Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 13098 George Weber Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 13220 Wilfred Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 13225 Brockton Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1070 Windham Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1550 Central Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1135 Aviation Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8715 Bollman Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8501 East Raintree Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1150 Gateway Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5555 12th Avenue East [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5651 Innovation Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1210 Champion Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 9300 Old Scotland Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3990 Heritage Oak Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3654-3668 Swenson Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3701 Illinois Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3950-3980 Swenson Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1501 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1527 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1551 102nd Avenue North [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6900 Harbor View Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6920 Harbour View Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 6950 Harbour View Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1516 Fryar Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1301 International Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 13621 NW 12th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 13630 NW 8th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 13650 NW 8th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 111 Kelsey Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 131 Kelsey Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 150-182 Kelsey Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 200-34 Kelsey Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3102,3104,3110 Cherry Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3401-3409 Cragmont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3502 Roga Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3505 Cragmont Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 3608 Queen Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4502 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4503 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4505 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4508 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4511 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4520 Seedling Circle [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4630 Woodland Corporate Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 4631 Woodland Corporate Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 501 US Highway 301 South [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5250 Eagle Trail Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5501-5519 Pioneer Park Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5690-5694 Crenshaw Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 701-725 South US Hwy 301 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7621 Bald Cypress Place (Bldg N) [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7724 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7725 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7802-50 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7851-7861 Woodland Center Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7852-98 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7920 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 7930, 8010-20 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8001 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8110 Anderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8112-42 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8130 Anderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8154-8198 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8212 Woodland Center Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8401-8408 Benjamin Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8705 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8715 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8725 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8735 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8745 Henderson Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8900-34 Brittany Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 9001-9015 Brittany Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 9002-9036 Brittany Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 901-933 US Highway 301 South [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 9020 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 9110 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 9203 King Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 9306-24 East Broadway Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 9319 Peach Palm Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 9704 Solar Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 9945 Currie Davis Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1720 W Rio Salado Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1850 W Rio Salado Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1858 E Encanto Dr [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 475 W Vaughn St [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 921 South Park Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8313 West Pierce Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8591 West Washington [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 8601 West Washington [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5111 S Royal Atlanta Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 5151 S Royal Atlanta Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1100 17th Street NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2100 M Street NW [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1200 Liberty Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1500 Liberty Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 825 Duportail Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 400-500 Brandywine Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 600 Brandywine Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1400 Powis Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1 Kings Hill Aveune [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 42 Kings Hill Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | Liberty Square, Block 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | Liberty Square, Block 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | Liberty Square, Block 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | Liberty Square, Block 5 [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 1400 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 300 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 400 Northpoint Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2935 West Corporate Lakes Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 2945 West Corporate Lakes Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Operating Properties [Member] | Minimum [Member] | 43-47 Hintz Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation		5 years
Development in Progress [Member] | 8620 Congdon Hill Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Alburtis, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					38,328,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				11,489,588
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					49,817,588
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 49,817,588			49,817,588
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 49,817,588
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 800 Uline Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					14,754,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				12,639,279
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					27,393,279
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 27,393,279			27,393,279
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 27,393,279
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 700 Uline Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Allentown, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					26,311,300
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				30,292,697
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					56,603,997
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 56,603,997			56,603,997
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 56,603,997
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 3225 Gravel Springs Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Buford, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,807,020
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				277,833
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,084,853
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,084,853			3,084,853
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,084,853
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 3525 Gravel Springs Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Buford, GA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,391,065
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				182,177
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,573,242
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,573,242			1,573,242
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,573,242
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 5032 Sirona Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,416,763
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				7,275,237
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					8,692,000
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,692,000			8,692,000
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,692,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 11020 Holly Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Dayton, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,536,731
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				10,926,042
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					13,462,773
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 13,462,773			13,462,773
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 13,462,773
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 333 Howard Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Des Plaines, IL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					7,928,724
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				11,609,920
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					19,538,644
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 19,538,644			19,538,644
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 19,538,644
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 1951 TW Alexander Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Durham, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,115,595
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				302,394
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,417,989
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,417,989			1,417,989
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,417,989
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 1953 TW Alexander Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Durham, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,402,820
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,004,841
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,407,661
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,407,661			3,407,661
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,407,661
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 1957 TW Alexander Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Durham, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,844,943
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,467,665
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,312,608
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,312,608			3,312,608
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,312,608
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 120 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Greer, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,243,100
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				6,568,523
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,811,623
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,811,623			7,811,623
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,811,623
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 130 Caliber Ridge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Greer, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,171,160
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,065,871
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,237,031
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,237,031			6,237,031
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,237,031
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 4485 Premier Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		High Point, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,827,595
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				368,166
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					2,195,761
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,195,761			2,195,761
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,195,761
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 10720 West Sam Houston Parkway North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,871,875
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				29,893,209
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					33,765,084
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 33,765,084			33,765,084
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 33,765,084
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 5430 FAA Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Irving, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,245,346
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,756,907
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,002,253
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,002,253			5,002,253
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,002,253
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 951 Valleyview Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Irving, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,899,824
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,255,183
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					9,155,007
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 9,155,007			9,155,007
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 9,155,007
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 11250 NW 122nd Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Medley, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,798,886
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				9,352,489
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					14,151,375
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 14,151,375			14,151,375
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 14,151,375
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 1050 Constitution Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,682,445
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					1,682,445
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,682,445			1,682,445
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,682,445
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 1200 Intrepid Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					404,883
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				17,925,128
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					18,330,011
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 18,330,011			18,330,011
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 18,330,011
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 351 Rouse Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					359,864
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,120,713
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					3,480,577
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,480,577			3,480,577
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,480,577
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 4701 League Island Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Philadelphia, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					419,107
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				12,090,516
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					12,509,623
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 12,509,623			12,509,623
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 12,509,623
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 5800 Eastport Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Richmond, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					604,146
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				7,054,435
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					7,658,581
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,658,581			7,658,581
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,658,581
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 5800 Technology Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Sandston, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,741,867
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,319,003
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					5,060,870
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,060,870			5,060,870
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,060,870
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 1910 W Rio Salado Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tempe, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,693,504
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				23,421,674
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					28,115,178
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 28,115,178			28,115,178
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 28,115,178
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 1930 W Rio Salado Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tempe, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,069,890
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,575,094
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					6,644,984
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 6,644,984			6,644,984
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 6,644,984
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Development in Progress [Member] | 2040 W Rio Salado Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tempe, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,225,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				7,617,711
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					10,842,711
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 10,842,711			10,842,711
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 10,842,711
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		0
Development in Progress [Member] | Total Development in Progress [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					135,413,008
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				225,534,740
Real Estate and Accumulated Depreciation, Carrying Amount of Land					0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					360,947,748
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		360,947,748			360,947,748
Real Estate and Accumulated Depreciation, Accumulated Depreciation		0			0
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		360,947,748
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | 4551 New York Avenue Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Arlington, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,754,659
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				403,475
Real Estate and Accumulated Depreciation, Carrying Amount of Land					5,158,133
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,158,133			5,158,133
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,158,133
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Mill Creek Road Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Bethlehem, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					17,719,400
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,777,765
Real Estate and Accumulated Depreciation, Carrying Amount of Land					20,497,165
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 20,497,165			20,497,165
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 20,497,165
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Boca Colannade Yamato Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Boca Raton, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,039,735
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				684,340
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,724,075
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,724,075			2,724,075
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,998
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,724,075
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | 12912 Virkler Drive Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					208,646
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				75,163
Real Estate and Accumulated Depreciation, Carrying Amount of Land					283,809
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 283,809			283,809
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,010
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 283,809
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Charlotte Distribution Center Land-Lot 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					654,713
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,320
Real Estate and Accumulated Depreciation, Carrying Amount of Land					657,033
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 657,033			657,033
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 657,033
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Shopton Ridge Business Park Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Charlotte, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					642,756
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				359,147
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,001,903
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,001,903			1,001,903
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,001,903
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Holly Lane North Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Dayton, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					889,205
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				129,550
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,018,755
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,018,755			1,018,755
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,018,755
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | French Lake Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Dayton/Rogers, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					13,513,632
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,253,172
Real Estate and Accumulated Depreciation, Carrying Amount of Land					14,766,804
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 14,766,804			14,766,804
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 14,766,804
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | 1951 TW Alexander Drive Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Durham, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					758,503
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				235,437
Real Estate and Accumulated Depreciation, Carrying Amount of Land					993,940
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 993,940			993,940
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 993,940
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Flying Cloud Drive Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Eden Pairie, MN
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,051,631
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				5,166,199
Real Estate and Accumulated Depreciation, Carrying Amount of Land					7,217,830
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,217,830			7,217,830
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,217,830
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Camelback 303 Business Center Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Goodyear, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					16,857,556
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,247,448
Real Estate and Accumulated Depreciation, Carrying Amount of Land					21,105,004
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 21,105,004			21,105,004
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 21,105,004
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Pleasant Ridge Road Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Greensboro, NC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					564,535
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,936,009
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,500,544
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,500,544			3,500,544
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,500,544
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Caliber Ridge Ind. Park Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Greer, SC
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					16,338
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				43,923
Real Estate and Accumulated Depreciation, Carrying Amount of Land					60,261
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 60,261			60,261
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 60,261
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Ridge Road & Hanover Road Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Hanover, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,875,203
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				578,732
Real Estate and Accumulated Depreciation, Carrying Amount of Land					4,453,935
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 4,453,935			4,453,935
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 4,453,935
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Ridge Road Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Hanover, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,371,183
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				(583,888)
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,787,295
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,787,295			2,787,295
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,008
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,787,295
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Interwood Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					5,160,668
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				14,470
Real Estate and Accumulated Depreciation, Carrying Amount of Land					5,175,138
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,175,138			5,175,138
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,175,138
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Rankin Road Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					5,756,865
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,417,149
Real Estate and Accumulated Depreciation, Carrying Amount of Land					9,174,014
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 9,174,014			9,174,014
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 9,174,014
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Richey Road Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					26,135,466
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				6,321,539
Real Estate and Accumulated Depreciation, Carrying Amount of Land					32,457,005
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 32,457,005			32,457,005
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 32,457,005
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Taub Beltway 8 Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Houston, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,611,474
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				920,126
Real Estate and Accumulated Depreciation, Carrying Amount of Land					5,531,600
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,531,600			5,531,600
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,531,600
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Frye Road and Valley View Lane Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Irving, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,917,440
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				330,155
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,247,595
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,247,595			2,247,595
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,247,595
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Kent County, UK [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Kent, UK
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				0
Real Estate and Accumulated Depreciation, Carrying Amount of Land					15,806,030
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 15,806,030			15,806,030
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 15,806,030
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Port Crossing Commerce Center Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		La Porte, TX
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					22,454,978
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				589,812
Real Estate and Accumulated Depreciation, Carrying Amount of Land					23,044,790
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 23,044,790			23,044,790
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 23,044,790
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Commodore Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Logan, NJ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					792,118
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,416,243
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,208,361
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,208,361			2,208,361
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,995
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,208,361
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Spring Creek Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Lower Macungie Twp, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					35,499,849
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				8,515,631
Real Estate and Accumulated Depreciation, Carrying Amount of Land					44,015,480
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 44,015,480			44,015,480
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 44,015,480
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | 380 Old Morehall Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,344,809
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				0
Real Estate and Accumulated Depreciation, Carrying Amount of Land					1,344,809
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 1,344,809			1,344,809
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 1,344,809
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | 6 Great Valley Parkway Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					603,050
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,049,126
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,652,176
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,652,176			2,652,176
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,652,176
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Quarry Ridge Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Malvern, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					675,499
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				297,332
Real Estate and Accumulated Depreciation, Carrying Amount of Land					972,831
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 972,831			972,831
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,001
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 972,831
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Miami International Tradeport Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Medley, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					16,739,632
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				10,787,022
Real Estate and Accumulated Depreciation, Carrying Amount of Land					27,526,654
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 27,526,654			27,526,654
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,011
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 27,526,654
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Monarch Towne Center Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Mirarar, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					6,085,337
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				1,164,543
Real Estate and Accumulated Depreciation, Carrying Amount of Land					7,249,880
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 7,249,880			7,249,880
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 7,249,880
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | 557 Nazareth Pike Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Nazareth, PA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,667,646
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				486,885
Real Estate and Accumulated Depreciation, Carrying Amount of Land					5,154,531
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,154,531			5,154,531
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,154,531
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | South 27th Street Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Oak Creek, WI
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					427,838
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				0
Real Estate and Accumulated Depreciation, Carrying Amount of Land					434,870
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 434,870			434,870
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 434,870
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Beachline Industrial Park Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Orlando, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					267,468
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				222,069
Real Estate and Accumulated Depreciation, Carrying Amount of Land					489,537
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 489,537			489,537
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,004
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 489,537
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Southern Boulevard Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Palm Beach County, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					12,042,368
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,671,872
Real Estate and Accumulated Depreciation, Carrying Amount of Land					16,714,240
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 16,714,240			16,714,240
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,014
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 16,714,240
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Buckeye Logistics Center West Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					11,203,594
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				703,833
Real Estate and Accumulated Depreciation, Carrying Amount of Land					11,907,427
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 11,907,427			11,907,427
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,013
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 11,907,427
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Cotton Center Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Phoenix, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					8,237,744
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				3,943
Real Estate and Accumulated Depreciation, Carrying Amount of Land					8,241,687
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,241,687			8,241,687
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,241,687
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Sherrif Road Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Prince George's County, MD
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					4,893,300
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				662,231
Real Estate and Accumulated Depreciation, Carrying Amount of Land					5,555,531
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 5,555,531			5,555,531
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,015
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 5,555,531
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Woodlands Center Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Sandston, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					148,314
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				21,442
Real Estate and Accumulated Depreciation, Carrying Amount of Land					169,756
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 169,756			169,756
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		1,996
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 169,756
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Northsight Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Scottsdale, AZ
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					6,176,464
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				2,176,777
Real Estate and Accumulated Depreciation, Carrying Amount of Land					8,353,241
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,353,241			8,353,241
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,005
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,353,241
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Suffolk Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Suffolk, VA
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					2,715,714
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				813,499
Real Estate and Accumulated Depreciation, Carrying Amount of Land					3,529,213
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 3,529,213			3,529,213
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 3,529,213
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | 6119 W. Linebaugh Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					180,136
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				30,114
Real Estate and Accumulated Depreciation, Carrying Amount of Land					210,250
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 210,250			210,250
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 210,250
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Legacy Park Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					3,289,423
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				4,950,267
Real Estate and Accumulated Depreciation, Carrying Amount of Land					8,239,690
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 8,239,690			8,239,690
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,006
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 8,239,690
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
Land Held for Development [Member] | Renaissance Park Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Location of Property		Tampa, FL
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					1,995,375
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				338,629
Real Estate and Accumulated Depreciation, Carrying Amount of Land					2,334,004
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		$ 2,334,004			2,334,004
Real Estate and Accumulated Depreciation, Accumulated Depreciation		$ 0			0
Real Estate and Accumulated Depreciation, Date Acquired or Developed		2,007
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		$ 2,334,004
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		0
Land Held for Development [Member] | Total Land Held for Development [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances					0
Real Estate and Accumulated Depreciation, Initial Cost of Land					251,940,264
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	[2]				69,213,501
Real Estate and Accumulated Depreciation, Carrying Amount of Land					336,966,826
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements					0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements		336,966,826			336,966,826
Real Estate and Accumulated Depreciation, Accumulated Depreciation		0			$ 0
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Real Estate, Gross		336,966,826
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Real Estate Accumulated Depreciation		$ 0
[1]	Does not include deferred financing costs and market adjustments.
[2]	Includes foreign currency changes and write-offs of certain fully depreciated assets and net of impairment charges.
[3]	Denotes property is collateralized under mortgages with Allianz, LaSalle Bank, Athene, New York Life and Wells Fargo totaling $232.1 million.