Duke Realty Limited PARTNERSHIP 10-Q 5 Aug 15 2015 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2015	Aug. 05, 2015
Entity Information [Line Items]
Entity Registrant Name	DUKE REALTY CORP
Entity Central Index Key	783,280
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		345,252,265
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Duke Realty Limited Partnership [Member]
Entity Information [Line Items]
Entity Registrant Name	DUKE REALTY LIMITED PARTNERSHIP\
Entity Central Index Key	1,003,410
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
ASSETS
Land and improvements	$ 1,395,664	$ 1,412,867
Buildings and tenant improvements	4,805,915	4,986,390
Construction in progress	216,352	246,062
Investments in and advances to unconsolidated companies	284,739	293,650
Undeveloped land	474,997	499,960
Real estate investment property, at cost, total	7,177,667	7,438,929
Accumulated depreciation	(1,178,976)	(1,235,337)
Net real estate investments	5,998,691	6,203,592
Real estate investments and other assets held-for-sale	72,384	725,051
Cash and cash equivalents	20,254	17,922
Accounts receivable, net of allowance	22,649	26,168
Straight-line rent receivable, net of allowance	111,255	109,657
Receivables on construction contracts, including retentions	14,529	36,224
Deferred financing costs, net of accumulated amortization	32,410	38,734
Deferred leasing and other costs, net of accumulated amortization	370,172	387,635
Escrow deposits and other assets	472,177	209,856
Total Assets	7,114,521	7,754,839
LIABILITIES AND EQUITY
Secured debt	778,869	942,478
Unsecured debt	2,681,874	3,364,161
Unsecured line of credit	0	106,000
Long-term debt, total	3,460,743	4,412,639
Liabilities related to real estate investments held-for-sale	3,742	59,092
Construction payables and amounts due subcontractors, including retentions	63,396	69,470
Accrued real estate taxes	73,556	76,308
Accrued interest	37,289	55,110
Other accrued expenses	41,939	62,632
Other liabilities	105,533	95,566
Tenant security deposits and prepaid rents	36,480	44,142
Total Liabilities	3,822,678	4,874,959
Equity
Common shares	3,451	3,441
Additional paid-in capital	4,953,224	4,944,800
Accumulated other comprehensive income	2,340	3,026
Distributions in excess of net income	(1,694,574)	(2,090,942)
Total shareholders' equity	3,264,441	2,860,325
Noncontrolling interests	27,402	19,555
Total Equity	3,291,843	2,879,880
Total Liabilities and Equity	7,114,521	7,754,839
Duke Realty Limited Partnership [Member]
ASSETS
Land and improvements	1,395,664	1,412,867
Buildings and tenant improvements	4,805,915	4,986,390
Construction in progress	216,352	246,062
Investments in and advances to unconsolidated companies	284,739	293,650
Undeveloped land	474,997	499,960
Real estate investment property, at cost, total	7,177,667	7,438,929
Accumulated depreciation	(1,178,976)	(1,235,337)
Net real estate investments	5,998,691	6,203,592
Real estate investments and other assets held-for-sale	72,384	725,051
Cash and cash equivalents	20,254	17,922
Accounts receivable, net of allowance	22,649	26,168
Straight-line rent receivable, net of allowance	111,255	109,657
Receivables on construction contracts, including retentions	14,529	36,224
Deferred financing costs, net of accumulated amortization	32,410	38,734
Deferred leasing and other costs, net of accumulated amortization	370,172	387,635
Escrow deposits and other assets	472,177	209,856
Total Assets	7,114,521	7,754,839
LIABILITIES AND EQUITY
Secured debt	778,869	942,478
Unsecured debt	2,681,874	3,364,161
Unsecured line of credit	0	106,000
Long-term debt, total	3,460,743	4,412,639
Liabilities related to real estate investments held-for-sale	3,742	59,092
Construction payables and amounts due subcontractors, including retentions	63,396	69,470
Accrued real estate taxes	73,556	76,308
Accrued interest	37,289	55,110
Other accrued expenses	42,168	62,812
Other liabilities	105,533	95,566
Tenant security deposits and prepaid rents	36,480	44,142
Total Liabilities	3,822,907	4,875,139
Equity
Common equity	3,261,872	2,857,119
General Partners' equity	3,261,872	2,857,119
Limited Partners' common equity	25,230	17,289
Accumulated other comprehensive income	2,340	3,026
Total partners' equity	3,289,442	2,877,434
Noncontrolling interests	2,172	2,266
Total Equity	3,291,614	2,879,700
Total Liabilities and Equity	$ 7,114,521	$ 7,754,839

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Accounts receivable, allowance	$ 1,831	$ 2,742
Straight-line rent receivable, allowance	7,069	8,405
Deferred financing costs, accumulated amortization	30,875	38,863
Deferred leasing and other costs, accumulated amortization	$ 245,840	$ 259,883
Common shares, par value	$ 0.01	$ 0.01
Common shares, shares authorized	600,000,000	600,000,000
Common shares, shares issued	345,249,000	344,112,000
Common shares, shares outstanding	345,249,000	344,112,000
Duke Realty Limited Partnership [Member]
Accounts receivable, allowance	$ 1,831	$ 2,742
Straight-line rent receivable, allowance	7,069	8,405
Deferred financing costs, accumulated amortization	30,875	38,863
Deferred leasing and other costs, accumulated amortization	$ 245,840	$ 259,883
Common equity, General Partner Units issued	345,249,000	344,112,000
Common equity, General Partner Units outstanding	345,249,000	344,112,000
Limited Partner Units issued	3,504,000	3,717,000
Limited Partner Units outstanding	3,504,000	3,717,000

Consolidated Statements of Oper

Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues:
Rental and related revenue	$ 201,996	$ 204,780	$ 416,611	$ 413,426
General contractor and service fee revenue	23,901	69,512	76,722	125,332
Revenues, total	225,897	274,292	493,333	538,758
Expenses:
Rental expenses	30,094	32,221	66,218	74,262
Real estate taxes	27,747	28,652	58,526	57,855
General contractor and other services expenses	21,738	63,857	68,762	111,128
Depreciation and amortization	78,334	88,500	160,237	176,798
Costs and expenses, total	157,913	213,230	353,743	420,043
Other operating activities:
Equity in earnings (loss) of unconsolidated companies	15,123	60,826	21,369	63,147
Gain on sale of properties	107,410	70,318	130,894	86,171
Gain on land sales	17,012	3,889	22,437	4,041
Other operating expenses	(1,555)	(1,987)	(3,112)	(4,203)
Asset Impairment Charges	(5,470)	(2,523)	(5,470)	(2,523)
General and administrative expenses	(19,238)	(10,365)	(36,242)	(25,059)
Other Operating Activities, Net	113,282	120,158	129,876	121,574
Operating income	181,266	181,220	269,466	240,289
Other income (expenses):
Interest and other income, net	1,375	229	1,713	580
Interest expense	(42,976)	(51,448)	(92,567)	(103,306)
Gains (Losses) on Extinguishment of Debt	(82,653)	(139)	(82,653)	(139)
Acquisition-related activity	(1,305)	(747)	(1,333)	(761)
Income from continuing operations before income taxes	55,707	129,115	94,626	136,663
Income Tax Benefit (Expense)	2,288	(364)	804	(3,038)
Income (loss) from continuing operations	57,995	128,751	95,430	133,625
Discontinued operations:
Income (loss) before gain on sales	36	5,471	10,195	9,393
Gain on sale of depreciable properties, net of tax	396,134	2,305	414,509	19,080
Income (loss) from discontinued operations	396,170	7,776	424,704	28,473
Net income (loss)	454,165	136,527	520,134	162,098
Dividends on preferred shares/units	0	(7,046)	0	(14,083)
Adjustments for redemption of preferred shares/units	0	0	0	483
Net (income) loss attributable to noncontrolling interests	(4,785)	(1,793)	(5,510)	(2,127)
Net income (loss) attributable to common shareholders/unitholders	$ 449,380	$ 127,688	$ 514,624	$ 146,371
Basic net income (loss) per common share/unit:
Continuing operations attributable to common shareholders/unitholders	$ 0.16	$ 0.36	$ 0.27	$ 0.35
Discontinued operations attributable to common shareholders/unitholders	1.14	0.02	1.22	0.09
Total	1.30	0.38	1.49	0.44
Diluted net income (loss) per common share/unit:
Continuing operations attributable to common shareholders/unitholders	0.16	0.36	0.27	0.35
Discontinued operations attributable to common shareholders/unitholders	1.14	0.02	1.22	0.09
Total	$ 1.30	$ 0.38	$ 1.49	$ 0.44
Weighted average number of common shares/units outstanding	345,098	331,753	344,849	329,442
Weighted average number of common shares/units and potential dilutive securities	349,161	336,414	348,945	334,102
Comprehensive income (loss):
Net income (loss)	$ 454,165	$ 136,527	$ 520,134	$ 162,098
Other comprehensive loss:
Amortization of interest contracts	(276)	(287)	(563)	(574)
Other Comprehensive Income, Other, Net of Tax	(123)	55	(123)	55
Total other comprehensive loss	(399)	(232)	(686)	(519)
Comprehensive income (loss)	453,766	136,295	519,448	161,579
Duke Realty Limited Partnership [Member]
Revenues:
Rental and related revenue	201,996	204,780	416,611	413,426
General contractor and service fee revenue	23,901	69,512	76,722	125,332
Revenues, total	225,897	274,292	493,333	538,758
Expenses:
Rental expenses	30,094	32,221	66,218	74,262
Real estate taxes	27,747	28,652	58,526	57,855
General contractor and other services expenses	21,738	63,857	68,762	111,128
Depreciation and amortization	78,334	88,500	160,237	176,798
Costs and expenses, total	157,913	213,230	353,743	420,043
Other operating activities:
Equity in earnings (loss) of unconsolidated companies	15,123	60,826	21,369	63,147
Gain on sale of properties	107,410	70,318	130,894	86,171
Gain on land sales	17,012	3,889	22,437	4,041
Other operating expenses	(1,555)	(1,987)	(3,112)	(4,203)
Asset Impairment Charges	(5,470)	(2,523)	(5,470)	(2,523)
General and administrative expenses	(19,238)	(10,365)	(36,242)	(25,059)
Other Operating Activities, Net	113,282	120,158	129,876	121,574
Operating income	181,266	181,220	269,466	240,289
Other income (expenses):
Interest and other income, net	1,375	229	1,713	580
Interest expense	(42,976)	(51,448)	(92,567)	(103,306)
Gains (Losses) on Extinguishment of Debt	(82,653)	(139)	(82,653)	(139)
Acquisition-related activity	(1,305)	(747)	(1,333)	(761)
Income from continuing operations before income taxes	55,707	129,115	94,626	136,663
Income Tax Benefit (Expense)	2,288	(364)	804	(3,038)
Income (loss) from continuing operations	57,995	128,751	95,430	133,625
Discontinued operations:
Income (loss) before gain on sales	36	5,471	10,195	9,393
Gain on sale of depreciable properties, net of tax	396,134	2,305	414,509	19,080
Income (loss) from discontinued operations	396,170	7,776	424,704	28,473
Net income (loss)	454,165	136,527	520,134	162,098
Dividends on preferred shares/units	0	(7,046)	0	(14,083)
Adjustments for redemption of preferred shares/units	0	0	0	483
Noncontrolling Interest in Net Income (Loss) Joint Venture Partners, NonRedeemable	(23)	(100)	(49)	(184)
Net income (loss) attributable to common shareholders/unitholders	$ 454,142	$ 129,381	$ 520,085	$ 148,314
Basic net income (loss) per common share/unit:
Continuing operations attributable to common shareholders/unitholders	$ 0.16	$ 0.36	$ 0.27	$ 0.35
Discontinued operations attributable to common shareholders/unitholders	1.14	0.02	1.22	0.09
Total	1.30	0.38	1.49	0.44
Diluted net income (loss) per common share/unit:
Continuing operations attributable to common shareholders/unitholders	0.16	0.36	0.27	0.35
Discontinued operations attributable to common shareholders/unitholders	1.14	0.02	1.22	0.09
Total	$ 1.30	$ 0.38	$ 1.49	$ 0.44
Weighted average number of common shares/units outstanding	348,728	336,139	348,511	333,828
Weighted average number of common shares/units and potential dilutive securities	349,161	336,414	348,945	334,102
Comprehensive income (loss):
Net income (loss)	$ 454,165	$ 136,527	$ 520,134	$ 162,098
Other comprehensive loss:
Amortization of interest contracts	(276)	(287)	(563)	(574)
Other Comprehensive Income, Other, Net of Tax	(123)	55	(123)	55
Total other comprehensive loss	(399)	(232)	(686)	(519)
Comprehensive income (loss)	$ 453,766	$ 136,295	$ 519,448	$ 161,579

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net income (loss)	$ 520,134	$ 162,098
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	128,624	144,618
Amortization of deferred leasing and other costs	35,130	51,287
Amortization of deferred financing costs	3,835	5,042
Straight-line rental income and expense, net	(12,775)	(10,892)
Asset Impairment Charges	5,470	2,523
Gains (Losses) on Extinguishment of Debt	82,653	139
Gains on land and depreciated property sales	(571,060)	(107,164)
Third-party construction contracts, net	4,956	(10,209)
Other accrued revenues and expenses, net	(11,924)	11,042
Operating distributions received in excess of (less than) equity in earnings from unconsolidated companies	(9,391)	(44,454)
Net cash provided by operating activities	175,652	204,030
Cash flows from investing activities:
Development of real estate investments	(109,617)	(226,575)
Acquisition of real estate investments and related intangible assets	(20,929)	(85,182)
Acquisition of undeveloped land	(25,579)	(11,800)
Second generation tenant improvements, leasing costs and building improvements	(30,871)	(44,367)
Other deferred leasing costs	(22,302)	(14,980)
Other assets	(94,745)	3,954
Proceeds from land and depreciated property sales, net	1,305,794	213,040
Capital distributions from unconsolidated companies	67,004	40,293
Capital contributions and advances to unconsolidated companies	(50,208)	(4,165)
Net cash provided by (used for) investing activities	1,018,547	(129,782)
Cash flows from financing activities:
Proceeds from issuance of common shares, net	4,756	191,107
Payments for redemption/repurchase of preferred shares/units	0	(17,656)
Payments on unsecured debt	(759,354)	(1,029)
Payments on secured indebtedness including principal amortization	(207,169)	(88,898)
Borrowings (payments) on line of credit, net	(106,000)	(28,000)
Distributions to common shareholders/unitholders	(117,274)	(111,919)
Distributions to preferred shareholders/unitholders	0	(14,186)
Distributions to Noncontrolling Interest, Net	(1,394)	(1,304)
Buyout of noncontrolling interests	0	(7,717)
Change in book overdrafts	(5,322)	7,659
Deferred financing costs	(110)	(355)
Net cash provided by (used for) financing activities	(1,191,867)	(72,298)
Net increase (decrease) in cash and cash equivalents	2,332	1,950
Cash and cash equivalents at beginning of period	17,922	19,275
Cash and cash equivalents at end of period	20,254	21,225
Noncash investing and financing activities:
Assumption of indebtedness and other liabilities in real estate acquisitions	0	54
Mortgage note receivable from buyer in property sale	200,000	0
Conversion of Limited Partner Units to common shares	(1,693)	56
Duke Realty Limited Partnership [Member]
Cash flows from operating activities:
Net income (loss)	520,134	162,098
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	128,624	144,618
Amortization of deferred leasing and other costs	35,130	51,287
Amortization of deferred financing costs	3,835	5,042
Straight-line rental income and expense, net	(12,775)	(10,892)
Asset Impairment Charges	5,470	2,523
Gains (Losses) on Extinguishment of Debt	82,653	139
Gains on land and depreciated property sales	(571,060)	(107,164)
Third-party construction contracts, net	4,956	(10,209)
Other accrued revenues and expenses, net	(11,875)	11,042
Operating distributions received in excess of (less than) equity in earnings from unconsolidated companies	(9,391)	(44,454)
Net cash provided by operating activities	175,701	204,030
Cash flows from investing activities:
Development of real estate investments	(109,617)	(226,575)
Acquisition of real estate investments and related intangible assets	(20,929)	(85,182)
Acquisition of undeveloped land	(25,579)	(11,800)
Second generation tenant improvements, leasing costs and building improvements	(30,871)	(44,367)
Other deferred leasing costs	(22,302)	(14,980)
Other assets	(94,745)	3,954
Proceeds from land and depreciated property sales, net	1,305,794	213,040
Capital distributions from unconsolidated companies	67,004	40,293
Capital contributions and advances to unconsolidated companies	(50,208)	(4,165)
Net cash provided by (used for) investing activities	1,018,547	(129,782)
Cash flows from financing activities:
Contributions from the General Partner	4,707	191,107
Payments for redemption/repurchase of preferred shares/units	0	(17,656)
Payments on unsecured debt	(759,354)	(1,029)
Payments on secured indebtedness including principal amortization	(207,169)	(88,898)
Borrowings (payments) on line of credit, net	(106,000)	(28,000)
Distributions to common shareholders/unitholders	(118,525)	(113,410)
Distributions to preferred shareholders/unitholders	0	(14,186)
Distributions to Noncontrolling Interest, Net	(143)	187
Buyout of noncontrolling interests	0	(7,717)
Change in book overdrafts	(5,322)	7,659
Deferred financing costs	(110)	(355)
Net cash provided by (used for) financing activities	(1,191,916)	(72,298)
Net increase (decrease) in cash and cash equivalents	2,332	1,950
Cash and cash equivalents at beginning of period	17,922	19,275
Cash and cash equivalents at end of period	20,254	21,225
Noncash investing and financing activities:
Assumption of indebtedness and other liabilities in real estate acquisitions	0	54
Mortgage note receivable from buyer in property sale	200,000	0
Conversion of Limited Partner Units to common shares	$ (1,693)	$ 56

Consolidated Statement of Chang

Consolidated Statement of Changes in Equity - 6 months ended Jun. 30, 2015 - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Distributions in Excess of Net Income [Member]	Non-controlling Interest [Member]	Duke Realty Limited Partnership [Member]	Duke Realty Limited Partnership [Member]Common Stock [Member]	Duke Realty Limited Partnership [Member]Limited Partner [Member]	Duke Realty Limited Partnership [Member]Accumulated Other Comprehensive Income (Loss) [Member]	Duke Realty Limited Partnership [Member]Non-controlling Interest [Member]	Duke Realty Limited Partnership [Member]Stockholders' Equity, Total [Member]
Beginning Balance - General Partner at Dec. 31, 2014	$ 2,879,880	$ 3,441	$ 4,944,800	$ 3,026	$ (2,090,942)	$ 19,555
Beginning Balance - Partnership at Dec. 31, 2014							$ 2,879,700	$ 2,857,119	$ 17,289	$ 3,026	$ 2,266	$ 2,877,434
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	520,134				514,624	5,510	520,134	514,624	5,461		49	520,085
Other comprehensive income	(686)			(686)			(686)			(686)		(686)
Issuance of common shares	4,756	2	4,754
Capital contribution from the General Partner							4,707	4,707				4,707
Stock based compensation plan activity	6,427	7	5,364		(982)	2,038	6,427	4,389	2,038			6,427
Conversion of Limited Partner Units		1	(1,694)			1,693		(1,693)	1,693
Distributions to Partners'							(118,525)	(117,274)	(1,251)			(118,525)
Distributions to common shareholders	(117,274)				(117,274)
Distributions to noncontrolling interests, net	(1,394)					(1,394)	(143)				(143)
Ending Balance - General Partner at Jun. 30, 2015	$ 3,291,843	$ 3,451	$ 4,953,224	$ 2,340	$ (1,694,574)	$ 27,402
Ending Balance - Partnership at Jun. 30, 2015							$ 3,291,614	$ 3,261,872	$ 25,230	$ 2,340	$ 2,172	$ 3,289,442

Consolidated Statement of Chan7

Consolidated Statement of Changes in Equity (Parenthetical)	6 Months Ended
	Jun. 30, 2015$ / shares
Distributions to common shareholders, per share	$ 0.34
Duke Realty Limited Partnership [Member]
Distributions to Partners, per Common Unit	$ 0.34

General Basis of Presentation (

General Basis of Presentation (Notes)	6 Months Ended
	Jun. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
General Basis of Presentation	General Basis of Presentation The interim consolidated financial statements included herein have been prepared by Duke Realty Corporation (the "General Partner") and Duke Realty Limited Partnership (the "Partnership"). In this Report, unless the context indicates otherwise, the terms "Company," "we," "us" and "our" refer to the General Partner and the Partnership, collectively, and those entities owned or controlled by the General Partner and/or the Partnership. The 2014 year-end consolidated balance sheet data included in this Quarterly Report on Form 10-Q (this "Report") was derived from the audited financial statements in the combined Annual Report on Form 10-K of the General Partner and the Partnership for the year ended December 31, 2014 , but does not include all disclosures required by accounting principles generally accepted in the United States of America ("GAAP"). The financial statements have been prepared in accordance with GAAP for interim financial information and in accordance with Rule 10-01 of Regulation S-X of the Securities Exchange Act of 1934, as amended. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation have been included. GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and revenue and expenses during the reporting period. Our actual results could differ from those estimates and assumptions. These financial statements should be read in conjunction with Management's Discussion and Analysis of Financial Condition and Results of Operations included herein and the consolidated financial statements and notes thereto included in the combined Annual Report on Form 10-K of the General Partner and the Partnership for the year ended December 31, 2014 . The General Partner was formed in 1985, and we believe that it qualifies as a real estate investment trust ("REIT") under the provisions of the Internal Revenue Code of 1986, as amended (the "Code"). The Partnership was formed on October 4, 1993, when the General Partner contributed all of its properties and related assets and liabilities, together with the net proceeds from an offering of additional shares of its common stock, to the Partnership. Simultaneously, the Partnership completed the acquisition of Duke Associates, a full-service commercial real estate firm operating in the Midwest whose operations began in 1972. The General Partner is the sole general partner of the Partnership, owning approximately 99.0% of the common partnership interests of the Partnership ("General Partner Units") at June 30, 2015 . The remaining 1.0% of the common partnership interests ("Limited Partner Units" and, together with the General Partner Units, the "Common Units") are owned by limited partners. As the sole general partner of the Partnership, the General Partner has full, exclusive and complete responsibility and discretion in the day-to-day management and control of the Partnership. The General Partner and the Partnership are operated as one enterprise. The management of the General Partner consists of the same members as the management of the Partnership. As the sole general partner with control of the Partnership, the General Partner consolidates the Partnership for financial reporting purposes, and the General Partner does not have any significant assets other than its investment in the Partnership. Therefore, the assets and liabilities of the General Partner and the Partnership are substantially the same. Limited Partners have the right to redeem their Limited Partner Units, subject to certain restrictions. Pursuant to the Fifth Amended and Restated Agreement of Limited Partnership, as amended (the "Partnership Agreement"), the General Partner is obligated to redeem the Limited Partner Units in shares of its common stock, unless it determines in its reasonable discretion that the issuance of shares of its common stock could cause it to fail to qualify as a REIT. Each Limited Partner Unit shall be redeemed for one share of the General Partner's common stock, or, in the event that the issuance of shares could cause the General Partner to fail to qualify as a REIT, cash equal to the fair market value of one share of the General Partner's common stock at the time of redemption, in each case, subject to certain adjustments described in the Partnership Agreement. The Limited Partner Units are not required, per the terms of the Partnership Agreement, to be redeemed in registered shares of the General Partner. The General Partner also owns preferred partnership interests in the Partnership ("Preferred Units"), to the extent the Partnership has issued Preferred Units. As of June 30, 2015 , we owned and operated a portfolio primarily consisting of industrial, medical office and office properties and provide real estate services to third-party owners. Substantially all of our Rental Operations (see Note 10) are conducted through the Partnership. We conduct our Service Operations (see Note 10) through Duke Realty Services, LLC, Duke Realty Services Limited Partnership and Duke Construction Limited Partnership ("DCLP"), which are consolidated entities that are 100% owned by a combination of the General Partner and the Partnership. DCLP is owned through a taxable REIT subsidiary. The consolidated financial statements include our accounts and the accounts of our majority-owned or controlled subsidiaries.

New Accounting Pronouncement (N

New Accounting Pronouncement (Notes)	6 Months Ended
	Jun. 30, 2015
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
New Accounting Pronouncements, Policy [Policy Text Block]	New Accounting Pronouncements Revenue Recognition In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers ("ASU 2014-09"). ASU 2014-09 is a comprehensive revenue recognition standard that will supersede nearly all existing GAAP revenue recognition guidance as well as impact the existing GAAP guidance governing the sale of nonfinancial assets. The standard’s core principle is that a company will recognize revenue when it satisfies performance obligations, by transferring promised goods or services to customers, in an amount that reflects the consideration to which the company expects to be entitled in exchange for fulfilling those performance obligations. In doing so, companies will need to exercise more judgment and make more estimates than under existing GAAP guidance. ASU 2014-09 will be effective for public entities for annual and interim reporting periods beginning after December 15, 2017 and early adoption is permitted in periods ending after December 15, 2016. The changes to the effective date and early adoption are still subject to final approval. ASU 2014-09 allows for either recognizing the cumulative effect of application (i) at the start of the earliest comparative period presented (with the option to use any or all of three practical expedients) or (ii) at the date of initial application, with no restatement of comparative periods presented. We have not yet selected a transition method nor have we determined the effect of ASU 2014-09 on our consolidated financial statements. Consolidation In February 2015, the FASB issued ASU 2015-02, Amendments to the Consolidation Analysis ("ASU 2015-02"). ASU 2015-02 makes targeted amendments to the current consolidation guidance and ends the deferral granted to investment companies from applying the existing variable interest entity guidance. ASU 2015-02 will be effective for public entities for annual and interim reporting periods beginning after December 15, 2015 with early adoption allowed in any interim period. We have not yet selected a transition method and are currently assessing the effect of ASU 2015-02 on our consolidated financial statements. Debt Issuance Costs In April 2015, the FASB issued ASU 2015-03, Simplifying the Presentation of Debt Issuance Costs ("ASU 2015-03"). ASU 2015-03 will require that debt issuance costs related to a recognized debt liability, which are currently presented as deferred charges (assets), be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability. ASU 2015-03 will be effective for financial statements issued for fiscal years beginning after December 15, 2015, and for interim periods within those fiscal years. We do not expect ASU 2015-03 to have a material effect on our consolidated financial statements.

Reclassifications

Reclassifications	6 Months Ended
	Jun. 30, 2015
Disclosure Text Block [Abstract]
Reclassifications	Reclassifications Certain amounts in the accompanying consolidated financial statements for 2014 have been reclassified to conform to the 2015 consolidated financial statement presentation.

Variable Interest Entities

Variable Interest Entities	6 Months Ended
	Jun. 30, 2015
Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]
Consolidation Policy for VIEs	Variable Interest Entities We have equity interests in unconsolidated joint ventures that primarily own and operate rental properties or hold land for development. We consolidate those joint ventures that are considered to be variable interest entities ("VIE"s) where we are the primary beneficiary. We analyze our investments in joint ventures to determine if the joint venture is considered a VIE and would require consolidation. We (i) evaluate the sufficiency of the total equity investment at risk, (ii) review 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) establish 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 we own interests in a VIE and we (i) are the sole entity that has the power to direct the activities of the VIE and (ii) have the obligation or rights to absorb the VIE's losses or receive its benefits, then we would be determined to be the primary beneficiary and would consolidate the VIE. To the extent we own interest in a VIE, then at each reporting period, we re-assess our conclusions as to which, if any, party within the VIE is considered the primary beneficiary. There were no consolidated or unconsolidated joint ventures at June 30, 2015 that met the criteria to be considered VIEs. Our maximum loss exposure for guarantees of joint venture indebtedness, for joint ventures that are not VIEs, totaled $76.3 million at June 30, 2015 .

Acquisitions and Dispositions

Acquisitions and Dispositions	6 Months Ended
	Jun. 30, 2015
Business Combinations [Abstract]
Acquisitions and Dispositions	Acquisitions and Dispositions Acquisitions and dispositions for the periods presented were completed in accordance with our strategy to reposition our investment concentration among product types and further diversify our geographic presence. With the exception of certain properties that have been sold or classified as held for sale, the results of operations for all acquired properties have been included in continuing operations within our consolidated financial statements since their respective dates of acquisition. Acquisitions We acquired one industrial property during the six months ended June 30, 2015 . The following table summarizes the fair value of amounts recognized for each major class of asset and liability (in thousands) for this acquisition: Real estate assets $ 18,246 Lease related intangible assets 2,001 Total acquired assets 20,247 Other liabilities 206 Total assumed liabilities 206 Fair value of acquired net assets $ 20,041 The leases in the acquired property had an average remaining life at acquisition of approximately 9.2 years. We have included $77,000 in rental revenues and $57,000 in income from continuing operations during the six months ended June 30, 2015 for the property since its date of acquisition. Fair Value Measurements The fair value estimates used in allocating the aggregate purchase price of an acquisition among the individual components of real estate assets and liabilities were determined primarily through calculating the "as-if vacant" value of a building, using the income approach, and relied significantly upon internally determined assumptions. We have determined that these estimates primarily rely upon Level 3 inputs, which are unobservable inputs based on our own assumptions. The range of most significant assumptions utilized in making the lease-up and future disposition estimates used in calculating the "as-if vacant" value for acquisition activity during the six months ended June 30, 2015 are as follows: Discount rate 7.07% Exit capitalization rate 5.57% Lease-up period (months) 12 Net rental rate per square foot - Industrial $4.85 Acquisition-Related Activity The acquisition-related activity in our consolidated Statements of Operations and Comprehensive Income consisted of transaction costs for completed acquisitions and adjustments to the fair value of contingent consideration from acquisitions after the measurement period is complete. Dispositions Dispositions of buildings (see Note 11 for the number of buildings sold as well as for their classification between continuing and discontinued operations) and undeveloped land generated net cash proceeds of $1.31 billion and $213.0 million during the six months ended June 30, 2015 and 2014 , respectively. On April 1, 2015, we completed the previously announced suburban office portfolio sale (the "Suburban Office Portfolio Sale") to a joint venture with affiliates of Starwood Capital Group, Vanderbilt Partners and Trinity Capital Advisors for approximately $1.07 billion in proceeds and recorded a gain on sale of $398.6 million . The Suburban Office Portfolio Sale includes all of our wholly-owned, in-service suburban office properties located in Nashville, Raleigh, South Florida and St. Louis. The portfolio included approximately 6.7 million square feet across 61 buildings and 57 acres of undeveloped land. One additional office asset currently under construction in Raleigh is expected to be sold upon completion in late 2015. A portion of the purchase price for the Suburban Office Portfolio Sale was financed through a $200.0 million first mortgage on certain of the properties in the Suburban Office Portfolio that we provided to the seller. The first mortgage matures on December 31, 2016, is prepayable after January 1, 2016, and bears interest at LIBOR plus 1.5% . We have reviewed the creditworthiness of the entities with which we hold this first mortgage and have concluded it is probable that we will be able to collect all amounts due according to its contractual terms. On April 8, 2015, we completed the sale of 51 non-strategic industrial properties for $270.0 million in proceeds and recorded a gain on sale of $106.6 million . These properties totaled 5.2 million square feet and were located in primarily Midwest markets.

Indebtedness

Indebtedness	6 Months Ended
	Jun. 30, 2015
Debt Disclosure [Abstract]
Indebtedness	Indebtedness All debt is held directly or indirectly by the Partnership. The General Partner does not have any indebtedness, but does guarantee some of the unsecured debt of the Partnership. The following table summarizes the book value and changes in the fair value, of our debt for the six months ended June 30, 2015 (in thousands): Book Value at 12/31/2014 Book Value at 6/30/2015 Fair Value at 12/31/2014 Payments/Payoffs Adjustments to Fair Value Fair Value at 6/30/2015 Fixed rate secured debt $ 979,842 $ 775,469 $ 1,065,301 $ (202,918 ) $ (16,404 ) $ 845,979 Variable rate secured debt 3,400 3,400 3,400 — — 3,400 Unsecured debt 3,364,161 2,681,874 3,603,475 (682,287 ) (111,749 ) 2,809,439 Unsecured line of credit 106,000 — 106,000 (106,000 ) — — Total $ 4,453,403 $ 3,460,743 $ 4,778,176 $ (991,205 ) $ (128,153 ) $ 3,658,818 Less secured debt related to real estate assets held-for-sale 40,764 — Total indebtedness as reported on consolidated balance sheets $ 4,412,639 $ 3,460,743 Secured Debt Because our fixed rate secured debt is not actively traded in any marketplace, we utilized a discounted cash flow methodology to determine its fair value. Accordingly, we calculated fair value by applying an estimate of the current market rate to discount the debt's remaining contractual cash flows. Our estimate of a current market rate, which is the most significant input in the discounted cash flow calculation, is intended to replicate debt of similar maturity and loan-to-value relationship. The estimated rates ranged from 2.20% to 3.70% , depending on the attributes of the specific loans. The current market rates we utilized were internally estimated; therefore, we have concluded that our determination of fair value for our fixed rate secured debt was primarily based upon Level 3 inputs. During the six months ended June 30, 2015 , we repaid fifteen secured loans, totaling $197.6 million . These loans had a weighted average stated interest rate of 5.32% . Certain of these secured loans were repaid prior to their scheduled maturity date, which resulted in a $3.8 million loss on extinguishment, which included both prepayment penalties as well as the write-off of unamortized deferred loan and mark to market costs. Unsecured Debt At June 30, 2015 , with the exception of one variable rate term note, all of our unsecured debt bore interest at fixed rates and primarily consisted of unsecured notes that are publicly traded. We utilized broker estimates in estimating the fair value of our fixed rate unsecured debt. Our unsecured notes are thinly traded and, in certain cases, the broker estimates were not based upon comparable transactions. The broker estimates took into account any recent trades within the same series of our fixed rate unsecured debt, comparisons to recent trades of other series of our fixed rate unsecured debt, trades of fixed rate unsecured debt from companies with profiles similar to ours, as well as overall economic conditions. We reviewed these broker estimates for reasonableness and accuracy, considering whether the estimates were based upon market participant assumptions within the principal and most advantageous market and whether any other observable inputs would be more accurate indicators of fair value than the broker estimates. We concluded that the broker estimates were representative of fair value. We have determined that our estimation of the fair value of our fixed rate unsecured debt was primarily based upon Level 3 inputs. The estimated trading values of our fixed rate unsecured debt, depending on the maturity and coupon rates, ranged from 98.00% to 126.00% of face value. We utilize a discounted cash flow methodology in order to estimate the fair value of our $250.0 million variable rate term loan. The net present value of the difference between future contractual interest payments and future interest payments based on our estimate of a current market rate represents the difference between the book value and the fair value. Our estimate of a current market rate was based on estimated market spreads and the quoted yields on federal government treasury securities with similar maturity dates. Our estimate of the current market rate for our variable rate term loan was 1.34% and was based primarily upon Level 3 inputs. In February 2015, we repaid a $250.0 million senior unsecured note at its maturity date. This loan had a stated interest rate of 7.38% and an effective rate of 7.50% . In April 2015, the Partnership completed a tender offer (the "Tender Offer") to purchase, for a combined aggregate purchase price (exclusive of accrued and unpaid interest) of up to $500.0 million , certain of its outstanding series of unsecured notes. A portion of the proceeds from the Suburban Office Portfolio Sale were used to fund the Tender Offer, which resulted in the repurchase of notes having a face value of $424.9 million , for a cash payment of $500.0 million . The repurchased notes had contractual maturity dates ranging between February 2017 and March 2020 and bore interest at stated rates ranging between 5.95% and 8.25% . Additionally, in May 2015, we repurchased unsecured notes with a face value of $6.3 million , for a cash payment of $7.1 million . These notes had a stated interest rate of 6.50% and an effective rate of 6.08% . The early repayment of unsecured notes, either through the Tender Offer or repurchase, resulted in an aggregate loss on extinguishment of $78.9 million , which included applicable repurchase premiums as well as the write-off of unamortized deferred loan costs. The indentures (and related supplemental indentures) governing our outstanding series of notes also require us to comply with financial ratios and other covenants regarding our operations. We were in compliance with all such covenants at June 30, 2015 . Unsecured Line of Credit Our unsecured line of credit at June 30, 2015 is described as follows (in thousands): Description Maximum Capacity Maturity Date Outstanding Balance at June 30, 2015 Unsecured Line of Credit - Partnership $ 1,200,000 January 2019 $ — The Partnership's unsecured line of credit has an interest rate on borrowings of LIBOR plus 1.05% and a maturity date of January 2019 . Subject to certain conditions, the terms also include an option to increase the facility by up to an additional $400.0 million , for a total of up to $1.6 billion . This line of credit provides us with an option to obtain borrowings from financial institutions that participate in the line at rates that may be lower than the stated interest rate, subject to certain restrictions. This line of credit contains financial covenants that require us to meet certain financial ratios and defined levels of performance, including those related to fixed charge coverage, unsecured interest expense coverage and debt-to-asset value (with asset value being defined in the Partnership's unsecured line of credit agreement). At June 30, 2015 , we were in compliance with all covenants under this line of credit.

Shareholders' Equity

Shareholders' Equity	6 Months Ended
	Jun. 30, 2015
Stockholders' Equity Note [Abstract]
Shareholders' Equity	Shareholders' Equity of the General Partner and Partners' Capital of the Partnership General Partner During the six months ended June 30, 2015 , the General Partner issued 233,000 common shares pursuant to its at the market equity program, generating gross proceeds of approximately $5.0 million and, after deducting commissions and other costs, net proceeds of approximately $4.8 million . The proceeds from these offerings were contributed to the Partnership and used for general corporate purposes. Partnership For each common share or preferred share that the General Partner issues, the Partnership issues a corresponding General Partner Unit or Preferred Unit, as applicable, to the General Partner in exchange for the contribution of the proceeds from the stock issuance. Similarly, when the General Partner redeems or repurchases common shares or preferred shares, the Partnership redeems the corresponding Common Units or Preferred Units held by the General Partner at the same price.

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2015
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions We provide property management, asset management, leasing, construction and other tenant-related services to unconsolidated companies in which we have equity interests. We recorded the corresponding fees based on contractual terms that approximate market rates for these types of services and have eliminated our ownership percentage of these fees in the consolidated financial statements. The following table summarizes the fees earned from these companies, prior to the elimination of our ownership percentage, for the six months ended June 30, 2015 and 2014 , respectively (in thousands): Three Months Ended Six Months Ended June 30, June 30, 2015 2014 2015 2014 Management fees $ 1,752 $ 2,117 $ 3,553 $ 4,336 Leasing fees 389 2,169 1,022 2,513 Construction and development fees 725 2,417 1,130 3,382

Net Income (Loss) Per Common Sh

Net Income (Loss) Per Common Share	6 Months Ended
	Jun. 30, 2015
Earnings Per Share [Abstract]
Net Income (Loss) Per Common Share	Net Income (Loss) Per Common Share or Common Unit Basic net income (loss) per common share or Common Unit is computed by dividing net income (loss) attributable to common shareholders or common unitholders, less dividends or distributions on share-based awards expected to vest (referred to as "participating securities" and primarily composed of unvested restricted stock units), by the weighted average number of common shares or Common Units outstanding for the period. Diluted net income (loss) per common share is computed by dividing the sum of basic net income (loss) attributable to common shareholders and the noncontrolling interest in earnings allocable to Limited Partner Units (to the extent the Limited Partner Units are dilutive) by the sum of the weighted average number of common shares outstanding and, to the extent they are dilutive, Units outstanding and any potential dilutive securities for the period. Diluted net income (loss) per Common Unit is computed by dividing the basic net income (loss) attributable to common unitholders by the sum of the weighted average number of Common Units outstanding and any potential dilutive securities for the period. The following table reconciles the components of basic and diluted net income per common share or Common Unit for the three and six months ended June 30, 2015 and 2014 , respectively (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 General Partner Net income attributable to common shareholders $ 449,380 $ 127,688 $ 514,624 $ 146,371 Less: Dividends on participating securities (589 ) (646 ) (1,209 ) (1,289 ) Basic net income attributable to common shareholders 448,791 127,042 513,415 145,082 Noncontrolling interest in earnings of common unitholders 4,762 1,693 5,461 1,943 Diluted net income attributable to common shareholders $ 453,553 $ 128,735 $ 518,876 $ 147,025 Weighted average number of common shares outstanding 345,098 331,753 344,849 329,442 Weighted average Limited Partner Units outstanding 3,630 4,386 3,662 4,386 Other potential dilutive shares 433 275 434 274 Weighted average number of common shares and potential dilutive securities 349,161 336,414 348,945 334,102 Partnership Net income attributable to common unitholders $ 454,142 $ 129,381 $ 520,085 $ 148,314 Less: Distributions on participating securities (589 ) (646 ) (1,209 ) (1,289 ) Basic and diluted net income attributable to common unitholders $ 453,553 $ 128,735 $ 518,876 $ 147,025 Weighted average number of Common Units outstanding 348,728 336,139 348,511 333,828 Other potential dilutive units 433 275 434 274 Weighted average number of Common Units and potential dilutive securities 349,161 336,414 348,945 334,102 Substantially all potential shares related to our stock-based compensation plans are anti-dilutive for all periods presented. The following table summarizes the data that is excluded from the computation of net income per common share or Common Unit as a result of being anti-dilutive (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 General Partner and Partnership Potential dilutive shares or units: Anti-dilutive outstanding potential shares or units under fixed stock option and other stock-based compensation plans 997 1,215 997 1,215 Outstanding participating securities 3,463 3,830 3,463 3,830

Segment Reporting

Segment Reporting	6 Months Ended
	Jun. 30, 2015
Segment Reporting [Abstract]
Segment Reporting	Segment Reporting Reportable Segments We had four reportable operating segments at June 30, 2015 , the first three of which consist of the ownership and rental of (i) industrial, (ii) medical office and (iii) office real estate investments. The operations of our industrial, medical office and office properties, along with our retail properties, are collectively referred to as "Rental Operations." Properties not included in our reportable segments, which do not by themselves meet the quantitative thresholds for separate presentation as a reportable segment, are referred to as non-reportable Rental Operations. The fourth reportable segment consists of various real estate services such as property management, asset management, maintenance, leasing, development, general contracting and construction management to third-party property owners and joint ventures, and is collectively referred to as "Service Operations." Our reportable segments offer different products or services and are managed separately because each segment requires different operating strategies and management expertise. Revenues by Reportable Segment The following table shows the revenues for each of the reportable segments, as well as a reconciliation to consolidated revenues, for the three and six months ended June 30, 2015 and 2014 , respectively (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Revenues Rental Operations: Industrial $ 135,487 $ 128,263 $ 283,115 $ 261,554 Medical Office 40,274 34,954 80,302 68,264 Office 23,691 38,586 48,826 77,565 Non-reportable Rental Operations — 1,629 — 3,716 Service Operations 23,901 69,512 76,722 125,332 Total segment revenues 223,353 272,944 488,965 536,431 Other revenue 2,544 1,348 4,368 2,327 Consolidated revenue from continuing operations 225,897 274,292 493,333 538,758 Discontinued operations 49 29,331 32,164 59,403 Consolidated revenue $ 225,946 $ 303,623 $ 525,497 $ 598,161 Supplemental Performance Measure Property level net operating income on a cash basis ("PNOI") is the non-GAAP supplemental performance measure that we use to evaluate the performance of, and to allocate resources among, the real estate investments in the reportable and operating segments that comprise our Rental Operations. PNOI for our Rental Operations segments is comprised of rental revenues from continuing operations less rental expenses and real estate taxes from continuing operations, along with certain other adjusting items (collectively referred to as "Rental Operations revenues and expenses excluded from PNOI," as shown in the following table). Additionally, we do not allocate interest expense, depreciation expense and certain other non-property specific revenues and expenses (collectively referred to as "Non-Segment Items," as shown in the following table) to our individual operating segments. We evaluate the performance of our Service Operations reportable segment using net income or loss, as allocated to that segment ("Earnings from Service Operations"). The following table shows a reconciliation of our segment-level measures of profitability to consolidated income from continuing operations before income taxes for the three and six months ended June 30, 2015 and 2014 , respectively (in thousands and excluding discontinued operations): Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 PNOI Industrial $ 99,408 $ 87,897 $ 195,456 $ 172,056 Medical Office 25,820 22,015 51,051 42,592 Office 12,885 13,611 25,166 25,525 Non-reportable Rental Operations — 1,300 — 2,405 PNOI, excluding all sold/held for sale properties 138,113 124,823 271,673 242,578 PNOI from sold/held-for-sale properties included in continuing operations 2,751 16,306 11,463 31,602 PNOI, continuing operations 140,864 141,129 283,136 274,180 Earnings from Service Operations 2,163 5,655 7,960 14,204 Rental Operations revenues and expenses excluded from PNOI: Straight-line rental income and expense, net 3,956 4,077 11,107 9,778 Revenues related to lease buyouts 94 1,525 958 4,220 Amortization of lease concessions and above and below market rents (490 ) (1,389 ) (2,203 ) (3,600 ) Intercompany rents and other adjusting items (412 ) (1,355 ) (872 ) (2,497 ) Non-Segment Items: Equity in earnings of unconsolidated companies 15,123 60,826 21,369 63,147 Interest expense (42,976 ) (51,448 ) (92,567 ) (103,306 ) Depreciation expense (78,334 ) (88,500 ) (160,237 ) (176,798 ) Gain on sale of properties 107,410 70,318 130,894 86,171 Impairment charges on non-depreciable properties (5,470 ) (2,523 ) (5,470 ) (2,523 ) Interest and other income, net 1,375 229 1,713 580 General and administrative expenses (19,238 ) (10,365 ) (36,242 ) (25,059 ) Gain on land sales 17,012 3,889 22,437 4,041 Other operating expenses (1,555 ) (1,987 ) (3,112 ) (4,203 ) Loss on extinguishment of debt (82,653 ) (139 ) (82,653 ) (139 ) Acquisition-related activity (1,305 ) (747 ) (1,333 ) (761 ) Other non-segment revenues and expenses, net 143 (80 ) (259 ) (772 ) Income from continuing operations before income taxes $ 55,707 $ 129,115 $ 94,626 $ 136,663 The most comparable GAAP measure to PNOI is income from continuing operations before income taxes. PNOI excludes expenses that materially impact our overall results of operations and, therefore, should not be considered as a substitute for income from continuing operations before income taxes or any other measures derived in accordance with GAAP. Furthermore, PNOI may not be comparable to other similarly titled measures of other companies. Assets by Reportable Segment The assets for each of the reportable segments at June 30, 2015 and December 31, 2014 were as follows (in thousands): June 30, December 31, Assets Rental Operations: Industrial $ 4,510,800 $ 4,677,047 Medical Office 1,226,567 1,229,632 Office 654,467 1,252,627 Non-reportable Rental Operations — 71,741 Service Operations 136,614 158,762 Total segment assets 6,528,448 7,389,809 Non-segment assets 586,073 365,030 Consolidated assets $ 7,114,521 $ 7,754,839

Discontinued Operations and Ass

Discontinued Operations and Assets Held for Sale	6 Months Ended
	Jun. 30, 2015
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations and Assets Held for Sale	Discontinued Operations and Assets Held-for-Sale Discontinued Operations Beginning with our adoption of ASU 2014-08 on April 1, 2014, discontinued operations presentation applies only to disposals representing a strategic shift that has (or will have) a major effect on an entity’s operations and financial results (e.g., a disposal of a major geographical area, a major line of business, a major equity method investment or other major parts of an entity). On April 1, 2015, we completed the Suburban Office Portfolio Sale that had been under agreement for sale since late January 2015. Because of the size of this disposition, and the fact that it represented our exit from the office product type in four geographic markets, we determined that the disposition represented a strategic shift that would have a major effect on our operations and financial results. As such, the in-service properties in this portfolio met the criteria to be classified within discontinued operations. As the result of its classification within discontinued operations, the in-service assets and liabilities of this portfolio are required to be presented as held-for-sale for all prior periods presented in our Consolidated Balance Sheets. The following table illustrates the number of sold or held-for-sale properties included in, or excluded from, discontinued operations: Held-for-Sale at June 30, 2015 Sold through June 30, 2015 Sold in 2014 Total Industrial 0 5 11 16 Medical Office 0 1 1 2 Office 0 56 0 56 Total properties included in discontinued operations 0 62 12 74 Properties excluded from discontinued operations 9 62 17 88 Total properties sold or classified as held-for-sale 9 124 29 162 For the properties that were classified in discontinued operations, we allocated interest expense to discontinued operations and have included such interest expense in computing income from discontinued operations. Interest expense allocable to discontinued operations includes interest on any secured debt for properties included in discontinued operations and an allocable share of our consolidated unsecured interest expense for unencumbered properties. The allocation of unsecured interest expense to discontinued operations was based upon the gross book value of the unencumbered real estate assets included in discontinued operations as it related to the total gross book value of our unencumbered real estate assets. The following table illustrates the operational results of the buildings reflected in discontinued operations for the six months ended June 30, 2015 and 2014 , respectively (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Revenues $ 49 $ 29,331 $ 32,164 $ 59,403 Operating expenses (13 ) (11,101 ) (12,399 ) (23,504 ) Depreciation and amortization — (9,141 ) (3,517 ) (19,107 ) Operating income 36 9,089 16,248 16,792 Interest expense — (3,618 ) (6,053 ) (7,399 ) Income before gain on sales 36 5,471 10,195 9,393 Gain on sale of depreciable properties 399,354 2,851 417,729 22,603 Income from discontinued operations before income taxes 399,390 8,322 427,924 31,996 Income tax expense (3,220 ) (546 ) (3,220 ) (3,523 ) Income from discontinued operations $ 396,170 $ 7,776 $ 424,704 $ 28,473 Capital expenditures on a cash basis for the six months ended June 30, 2015 and 2014 were $7.4 million and $9.9 million , respectively, related to properties classified within discontinued operations. Allocation of Noncontrolling Interests - General Partner The following table illustrates the General Partner's share of the income attributable to common shareholders from continuing operations and discontinued operations, reduced by the allocation of income between continuing and discontinued operations to the Limited Partner Units, for the six months ended June 30, 2015 and 2014 , respectively (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Income from continuing operations attributable to common shareholders $ 57,333 $ 120,013 $ 94,382 $ 118,272 Income from discontinued operations attributable to common shareholders 392,047 7,675 420,242 28,099 Net income attributable to common shareholders $ 449,380 $ 127,688 $ 514,624 $ 146,371 Allocation of Noncontrolling Interests - Partnership Substantially all of the income from discontinued operations for all periods presented in the Partnership's Consolidated Statements of Operations and Comprehensive Income is attributable to the common unitholders. Properties Held-for-Sale At June 30, 2015 , nine in-service properties and 29 acres of undeveloped land were classified as held-for-sale but did not meet the criteria to be classified within discontinued operations. The following table illustrates aggregate balance sheet information for all held-for-sale properties at June 30, 2015 and December 31, 2014 (in thousands): June 30, 2015 December 31, 2014 Properties Included in Continuing Operations Properties Included in Continuing Operations Properties Included in Discontinued Operations Total Held-For-Sale Properties Land and improvements $ 13,443 $ 21,347 $ 126,921 $ 148,268 Buildings and tenant improvements 94,443 36,925 721,398 758,323 Undeveloped land 2,696 12,443 — 12,443 Accumulated depreciation (46,891 ) (23,071 ) (247,269 ) (270,340 ) Deferred leasing and other costs, net 4,393 3,480 44,840 48,320 Other assets 4,300 562 27,475 28,037 Total assets held-for-sale $ 72,384 $ 51,686 $ 673,365 $ 725,051 Secured debt $ — $ — $ 40,764 $ 40,764 Accrued expenses 1,885 233 5,180 5,413 Other liabilities 1,857 434 12,481 12,915 Total liabilities held-for-sale $ 3,742 $ 667 $ 58,425 $ 59,092

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2015
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Declaration of Dividends/Distributions The General Partner's board of directors declared the following dividends/distributions at its regularly scheduled board meeting held on July 29, 2015 : Class of stock/units Quarterly Amount per Share or Unit Record Date Payment Date Common $0.17 August 14, 2015 August 31, 2015

Acquisitions and Dispositions (

Acquisitions and Dispositions (Tables)	6 Months Ended
	Jun. 30, 2015
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	Real estate assets $ 18,246 Lease related intangible assets 2,001 Total acquired assets 20,247 Other liabilities 206 Total assumed liabilities 206 Fair value of acquired net assets $ 20,041
Summary of Most Significant Assumptions Utilized in the Estimations [Table Text Block]	Discount rate 7.07% Exit capitalization rate 5.57% Lease-up period (months) 12 Net rental rate per square foot - Industrial $4.85

Indebtedness (Tables)

Indebtedness (Tables)	6 Months Ended
	Jun. 30, 2015
Debt Disclosure [Abstract]
Fair Value, Liabilities Measured on a Recurring Basis, Disclosure Only	Book Value at 12/31/2014 Book Value at 6/30/2015 Fair Value at 12/31/2014 Payments/Payoffs Adjustments to Fair Value Fair Value at 6/30/2015 Fixed rate secured debt $ 979,842 $ 775,469 $ 1,065,301 $ (202,918 ) $ (16,404 ) $ 845,979 Variable rate secured debt 3,400 3,400 3,400 — — 3,400 Unsecured debt 3,364,161 2,681,874 3,603,475 (682,287 ) (111,749 ) 2,809,439 Unsecured line of credit 106,000 — 106,000 (106,000 ) — — Total $ 4,453,403 $ 3,460,743 $ 4,778,176 $ (991,205 ) $ (128,153 ) $ 3,658,818 Less secured debt related to real estate assets held-for-sale 40,764 — Total indebtedness as reported on consolidated balance sheets $ 4,412,639 $ 3,460,743
Unsecured Line of Credit	Description Maximum Capacity Maturity Date Outstanding Balance at June 30, 2015 Unsecured Line of Credit - Partnership $ 1,200,000 January 2019 $ —

Related Party Transactions (Tab

Related Party Transactions (Tables)	6 Months Ended
	Jun. 30, 2015
Related Party Transactions [Abstract]
Schedule of Fees Earned from Related Parties	Three Months Ended Six Months Ended June 30, June 30, 2015 2014 2015 2014 Management fees $ 1,752 $ 2,117 $ 3,553 $ 4,336 Leasing fees 389 2,169 1,022 2,513 Construction and development fees 725 2,417 1,130 3,382

Net Income (Loss) Per Common 23

Net Income (Loss) Per Common Share (Tables)	6 Months Ended
	Jun. 30, 2015
Earnings Per Share [Abstract]
Reconciling the Components of Basic and Diluted Net Income (Loss) per Common Share	Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 General Partner Net income attributable to common shareholders $ 449,380 $ 127,688 $ 514,624 $ 146,371 Less: Dividends on participating securities (589 ) (646 ) (1,209 ) (1,289 ) Basic net income attributable to common shareholders 448,791 127,042 513,415 145,082 Noncontrolling interest in earnings of common unitholders 4,762 1,693 5,461 1,943 Diluted net income attributable to common shareholders $ 453,553 $ 128,735 $ 518,876 $ 147,025 Weighted average number of common shares outstanding 345,098 331,753 344,849 329,442 Weighted average Limited Partner Units outstanding 3,630 4,386 3,662 4,386 Other potential dilutive shares 433 275 434 274 Weighted average number of common shares and potential dilutive securities 349,161 336,414 348,945 334,102 Partnership Net income attributable to common unitholders $ 454,142 $ 129,381 $ 520,085 $ 148,314 Less: Distributions on participating securities (589 ) (646 ) (1,209 ) (1,289 ) Basic and diluted net income attributable to common unitholders $ 453,553 $ 128,735 $ 518,876 $ 147,025 Weighted average number of Common Units outstanding 348,728 336,139 348,511 333,828 Other potential dilutive units 433 275 434 274 Weighted average number of Common Units and potential dilutive securities 349,161 336,414 348,945 334,102
Computation of Anti-Dilutive Common Share	Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 General Partner and Partnership Potential dilutive shares or units: Anti-dilutive outstanding potential shares or units under fixed stock option and other stock-based compensation plans 997 1,215 997 1,215 Outstanding participating securities 3,463 3,830 3,463 3,830

Segment Reporting (Tables)

Segment Reporting (Tables)	6 Months Ended
	Jun. 30, 2015
Segment Reporting [Abstract]
Reconciliation of Revenue from Segments to Consolidated	Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Revenues Rental Operations: Industrial $ 135,487 $ 128,263 $ 283,115 $ 261,554 Medical Office 40,274 34,954 80,302 68,264 Office 23,691 38,586 48,826 77,565 Non-reportable Rental Operations — 1,629 — 3,716 Service Operations 23,901 69,512 76,722 125,332 Total segment revenues 223,353 272,944 488,965 536,431 Other revenue 2,544 1,348 4,368 2,327 Consolidated revenue from continuing operations 225,897 274,292 493,333 538,758 Discontinued operations 49 29,331 32,164 59,403 Consolidated revenue $ 225,946 $ 303,623 $ 525,497 $ 598,161
Summary of Net Operation Income	Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 PNOI Industrial $ 99,408 $ 87,897 $ 195,456 $ 172,056 Medical Office 25,820 22,015 51,051 42,592 Office 12,885 13,611 25,166 25,525 Non-reportable Rental Operations — 1,300 — 2,405 PNOI, excluding all sold/held for sale properties 138,113 124,823 271,673 242,578 PNOI from sold/held-for-sale properties included in continuing operations 2,751 16,306 11,463 31,602 PNOI, continuing operations 140,864 141,129 283,136 274,180 Earnings from Service Operations 2,163 5,655 7,960 14,204 Rental Operations revenues and expenses excluded from PNOI: Straight-line rental income and expense, net 3,956 4,077 11,107 9,778 Revenues related to lease buyouts 94 1,525 958 4,220 Amortization of lease concessions and above and below market rents (490 ) (1,389 ) (2,203 ) (3,600 ) Intercompany rents and other adjusting items (412 ) (1,355 ) (872 ) (2,497 ) Non-Segment Items: Equity in earnings of unconsolidated companies 15,123 60,826 21,369 63,147 Interest expense (42,976 ) (51,448 ) (92,567 ) (103,306 ) Depreciation expense (78,334 ) (88,500 ) (160,237 ) (176,798 ) Gain on sale of properties 107,410 70,318 130,894 86,171 Impairment charges on non-depreciable properties (5,470 ) (2,523 ) (5,470 ) (2,523 ) Interest and other income, net 1,375 229 1,713 580 General and administrative expenses (19,238 ) (10,365 ) (36,242 ) (25,059 ) Gain on land sales 17,012 3,889 22,437 4,041 Other operating expenses (1,555 ) (1,987 ) (3,112 ) (4,203 ) Loss on extinguishment of debt (82,653 ) (139 ) (82,653 ) (139 ) Acquisition-related activity (1,305 ) (747 ) (1,333 ) (761 ) Other non-segment revenues and expenses, net 143 (80 ) (259 ) (772 ) Income from continuing operations before income taxes $ 55,707 $ 129,115 $ 94,626 $ 136,663
Reportable Segments Consolidated Assets	June 30, December 31, Assets Rental Operations: Industrial $ 4,510,800 $ 4,677,047 Medical Office 1,226,567 1,229,632 Office 654,467 1,252,627 Non-reportable Rental Operations — 71,741 Service Operations 136,614 158,762 Total segment assets 6,528,448 7,389,809 Non-segment assets 586,073 365,030 Consolidated assets $ 7,114,521 $ 7,754,839

Discontinued Operations and A25

Discontinued Operations and Assets Held for Sale (Tables)	6 Months Ended
	Jun. 30, 2015
Discontinued Operations and Disposal Groups [Abstract]
Table Illustration of Number of Properties in Discontinued Operations	Held-for-Sale at June 30, 2015 Sold through June 30, 2015 Sold in 2014 Total Industrial 0 5 11 16 Medical Office 0 1 1 2 Office 0 56 0 56 Total properties included in discontinued operations 0 62 12 74 Properties excluded from discontinued operations 9 62 17 88 Total properties sold or classified as held-for-sale 9 124 29 162
Table Illustration of Discontinued Operations in Statement of Operations	Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Revenues $ 49 $ 29,331 $ 32,164 $ 59,403 Operating expenses (13 ) (11,101 ) (12,399 ) (23,504 ) Depreciation and amortization — (9,141 ) (3,517 ) (19,107 ) Operating income 36 9,089 16,248 16,792 Interest expense — (3,618 ) (6,053 ) (7,399 ) Income before gain on sales 36 5,471 10,195 9,393 Gain on sale of depreciable properties 399,354 2,851 417,729 22,603 Income from discontinued operations before income taxes 399,390 8,322 427,924 31,996 Income tax expense (3,220 ) (546 ) (3,220 ) (3,523 ) Income from discontinued operations $ 396,170 $ 7,776 $ 424,704 $ 28,473
Allocation of Common Shareholders' Income (Loss) Between Continuing and Discontinued Operations	Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Income from continuing operations attributable to common shareholders $ 57,333 $ 120,013 $ 94,382 $ 118,272 Income from discontinued operations attributable to common shareholders 392,047 7,675 420,242 28,099 Net income attributable to common shareholders $ 449,380 $ 127,688 $ 514,624 $ 146,371
Schedule of Discontinued Operations, Properties Held-for-Sale, Aggregate Balance Sheet Information [Table Text Block]	The following table illustrates aggregate balance sheet information for all held-for-sale properties at June 30, 2015 and December 31, 2014 (in thousands): June 30, 2015 December 31, 2014 Properties Included in Continuing Operations Properties Included in Continuing Operations Properties Included in Discontinued Operations Total Held-For-Sale Properties Land and improvements $ 13,443 $ 21,347 $ 126,921 $ 148,268 Buildings and tenant improvements 94,443 36,925 721,398 758,323 Undeveloped land 2,696 12,443 — 12,443 Accumulated depreciation (46,891 ) (23,071 ) (247,269 ) (270,340 ) Deferred leasing and other costs, net 4,393 3,480 44,840 48,320 Other assets 4,300 562 27,475 28,037 Total assets held-for-sale $ 72,384 $ 51,686 $ 673,365 $ 725,051 Secured debt $ — $ — $ 40,764 $ 40,764 Accrued expenses 1,885 233 5,180 5,413 Other liabilities 1,857 434 12,481 12,915 Total liabilities held-for-sale $ 3,742 $ 667 $ 58,425 $ 59,092

Subsequent Events (Tables)

Subsequent Events (Tables)	6 Months Ended
	Jun. 30, 2015
Subsequent Events [Abstract]
Schedule of Dividends Declared	Class of stock/units Quarterly Amount per Share or Unit Record Date Payment Date Common $0.17 August 14, 2015 August 31, 2015

General Basis of Presentation27

General Basis of Presentation (Details)	6 Months Ended
	Jun. 30, 2015
Common partnership interests of DRLP Owned	99.00%
Duke Realty Limited Partnership [Member]
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest	1.00%

Variable Interest Entities (Bal

Variable Interest Entities (Balances Related to Joint Ventures) (Details) $ in Millions	Jun. 30, 2015USD ($)
Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]
Maximum Guarantee Exposure for Joint Venture Loans	$ 76.3

Acquisitions and Dispositions29

Acquisitions and Dispositions (Narrative) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2015USD ($)buildings	Jun. 30, 2014USD ($)	Jun. 30, 2015USD ($)buildings	Jun. 30, 2014USD ($)
Operating Income (Loss)	$ 181,266,000	$ 181,220,000	$ 269,466,000	$ 240,289,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			9 years 2 months 01 day
Operating Leases, Income Statement, Lease Revenue	$ 201,996,000	$ 204,780,000	$ 416,611,000	$ 413,426,000
Industrial [Member]
Number Of Real Estate Properties Acquired | buildings	1		1
Other 2015 Acquisitions [Member]
Operating Income (Loss)			$ 57,000
Operating Leases, Income Statement, Lease Revenue			$ 77,000

Acquisitions and Dispositions30

Acquisitions and Dispositions (Summary of Allocation of Fair Value of Amounts Recognized) (Details) $ in Thousands	Jun. 30, 2015USD ($)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Buildings	$ 18,246
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	2,001
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	20,247
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	206
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	206
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	$ 20,041

Acquisitions and Dispositions31

Acquisitions and Dispositions (Summary of Significant Assumptions Utilized in Estimates) (Details) - Jun. 30, 2015	$ / sqftmonths
Business Acquisition [Line Items]
Fair Value Inputs, Discount Rate	7.07%
Fair Value Inputs, Cap Rate	5.57%
Fair Value Measurement With Unobservable Inputs Lease up Period in Months	12
Industrial [Member]
Business Acquisition [Line Items]
Fair Value Measurement With Unobservable Inputs Rental Rate Per Square Foot | $ / sqft	4.85

Acquisitions and Dispositions D

Acquisitions and Dispositions Dispositions (Details) $ in Thousands, sqft in Millions	3 Months Ended	6 Months Ended		12 Months Ended
	Jun. 30, 2015USD ($)asqft	Jun. 30, 2015USD ($)abuildings	Jun. 30, 2014USD ($)	Dec. 31, 2014buildings
Dispositions Disclosures [Line Items]
Proceeds from Sale of Real Estate Held-for-investment		$ 1,305,794	$ 213,040
Number of Real Estate Properties Sold | buildings		124		29
Area of Land | a	57	57
Mortgage note receivable from buyer in property sale		$ 200,000	$ 0
Suburban Office Portfolio Sale [Member]
Dispositions Disclosures [Line Items]
Proceeds from Sale of Real Estate Held-for-investment		$ 1,070,000
Gains (Losses) on Sale of Real Estate	$ 398,600
Square Footage Of Real Estate Properties Acquired Or Disposed | sqft	6.7
Number of Real Estate Properties Sold | buildings		61
Industrial Portfolio Sale [Member]
Dispositions Disclosures [Line Items]
Proceeds from Sale of Real Estate Held-for-investment		$ 270,000
Gains (Losses) on Sale of Real Estate	$ 106,600
Square Footage Of Real Estate Properties Acquired Or Disposed | sqft	5.2
Number of Real Estate Properties Sold | buildings		51
London Interbank Offered Rate (LIBOR) [Member] | Suburban Office Portfolio Sale [Member]
Dispositions Disclosures [Line Items]
Debt Instrument, Description of Variable Rate Basis		LIBOR
Debt Instrument, Basis Spread on Variable Rate		1.50%

Indebtedness (Summary of Book V

Indebtedness (Summary of Book Value and Changes in Fair Value of Debt) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Disposal Groups, Secured Debt Related to Assets Held for Sale	$ 0	$ 40,764
Book value	3,460,743	4,412,639
Fair value	3,658,818	4,778,176
Long Term Debt Including Amounts Classified as Held for Sale	3,460,743	4,453,403
Payments/Payoffs	(991,205)
Adjustments to fair value	(128,153)
Fixed Rate Secured Debt [Member]
Book value	775,469	979,842
Fair value	845,979	1,065,301
Payments/Payoffs	(202,918)
Adjustments to fair value	(16,404)
Variable Rate Secured Debt [Member]
Book value	3,400	3,400
Fair value	3,400	3,400
Payments/Payoffs	0
Adjustments to fair value	0
Unsecured Debt [Member]
Book value	2,681,874	3,364,161
Fair value	2,809,439	3,603,475
Payments/Payoffs	(682,287)
Adjustments to fair value	(111,749)
Unsecured Line of Credit DRLP [Member]
Book value	0	106,000
Fair value	0	$ 106,000
Payments/Payoffs	(106,000)
Adjustments to fair value	$ 0

Indebtedness Secured Debt (Deta

Indebtedness Secured Debt (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015USD ($)	Jun. 30, 2014USD ($)	Jun. 30, 2015USD ($)loans	Jun. 30, 2014USD ($)
Debt Instrument [Line Items]
Repayments of Secured Debt			$ 207,169	$ 88,898
Gains (Losses) on Extinguishment of Debt	$ (82,653)	$ (139)	$ (82,653)	$ (139)
Fixed Rate Secured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage Rate Range, Minimum			2.20%
Debt Instrument, Interest Rate, Effective Percentage Rate Range, Maximum			3.70%
Number of secured loans repaid | loans			15
Repayments of Secured Debt			$ 197,600
Repaid Debt, Weighted Average Interest Rate	5.32%		5.32%
Secured Debt [Member]
Debt Instrument [Line Items]
Gains (Losses) on Extinguishment of Debt	$ 3,800

Indebtedness Unsecured Debt (De

Indebtedness Unsecured Debt (Details) $ in Thousands	May. 31, 2015USD ($)	Apr. 30, 2015USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2014USD ($)	Jun. 30, 2015USD ($)loans	Jun. 30, 2014USD ($)	Dec. 31, 2014USD ($)
Debt Instrument [Line Items]
Number of Variable Rate Unsecured Loans | loans					1
Long-term Debt			$ 3,460,743		$ 3,460,743		$ 4,412,639
Debt Instrument, Interest Rate, Effective Percentage	6.08%
Gains (Losses) on Extinguishment of Debt			(82,653)	$ (139)	(82,653)	$ (139)
Repayments of Unsecured Debt	$ 7,100	$ 500,000			759,354	$ 1,029
Debt Instrument, Interest Rate, Stated Percentage	6.50%
Unsecured Debt			2,681,874		2,681,874		$ 3,364,161
Debt Instrument, Repurchased Face Amount	$ 6,300	$ 424,900
Variable Rate UnSecured Debt [Member] [Member]
Debt Instrument [Line Items]
Long-term Debt			$ 250,000		$ 250,000
Debt Instrument, Interest Rate, Effective Percentage			1.34%		1.34%
Fixed Rate Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Estimated Trading Values, Percent of Face Value, Minimum					98.00%
Debt Instrument, Estimated Trading Values, Percent of Face Value, Maximum					126.00%
Debt Instrument, Covenant Compliance					We were in compliance with all such covenants at June 30, 2015
Fixed Rate Unsecured Debt Repaid [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage			7.50%		7.50%
Repayments of Unsecured Debt					$ 250,000
Debt Instrument, Interest Rate, Stated Percentage			7.38%		7.38%
Tender Offer [Member]
Debt Instrument [Line Items]
Unsecured Debt			$ 500,000		$ 500,000
Unsecured Debt [Member]
Debt Instrument [Line Items]
Gains (Losses) on Extinguishment of Debt			$ 78,900
Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.95%
Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		8.25%

Indebtedness (Unsecured Line of

Indebtedness (Unsecured Line of Credit) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Line of credit balance	$ 0	$ 106,000
Unsecured Line of Credit DRLP [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,600,000
Line of Credit Facility, Covenant Compliance	we were in compliance with all covenants under this line of credit.
Line of Credit Facility Option to Increase Borrowing Limit	$ 400,000
Unsecured Line of Credit DRLP [Member] | Unsecured Line of Credit DRLP [Member]
Maximum Capacity	$ 1,200,000
Maturity date	Jan. 1, 2019
Line of credit balance	$ 0
Unsecured Line of Credit DRLP [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Description of Variable Rate Basis	LIBOR
Debt Instrument, Basis Spread on Variable Rate	1.05%

Shareholders' Equity Shareholde

Shareholders' Equity Shareholders' Equity (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Issuance of common shares	$ 4,756	$ 191,107
At-the-market equity issuance [Member]
Stock Issued During Period, Shares, New Issues	233,000
Issuance of common shares	$ 4,800
At-the-market equity issuance [Member] | Gross Proceeds [Member]
Issuance of common shares	$ 5,000

Related Party Transactions (Sch

Related Party Transactions (Schedule of Fees Earned from Related Parties) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Management Fees [Member]
Revenue from related party transactions	$ 1,752	$ 2,117	$ 3,553	$ 4,336
Leasing Fees [Member]
Revenue from related party transactions	389	2,169	1,022	2,513
Construction and Development Fees [Member]
Revenue from related party transactions	$ 725	$ 2,417	$ 1,130	$ 3,382

Net Income (Loss) Per Common 39

Net Income (Loss) Per Common Share Reconciling the Components of Basic and Diluted Net Income (Loss) per Common Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss) attributable to common shareholders/unitholders, Basic	$ 449,380	$ 127,688	$ 514,624	$ 146,371
Participating Securities, Distributed and Undistributed Earnings (Loss), Basic	(589)	(646)	(1,209)	(1,289)
Basic Net Income (Loss) Attributable To Common Stockholders, Basic	448,791	127,042	513,415	145,082
Noncontrolling Interest in Net Income (Loss) Operating Partnerships, Redeemable	4,762	1,693	5,461	1,943
Diluted Net Income (Loss) Attributable to Common Stockholders	$ 453,553	$ 128,735	$ 518,876	$ 147,025
Weighted average number of common shares/units outstanding, Basic	345,098	331,753	344,849	329,442
Weighted Average Limited Partnership Units Outstanding, Basic	3,630	4,386	3,662	4,386
Other potential dilutive shares/units	433	275	434	274
Weighted average number of common shares/units and potential dilutive securities	349,161	336,414	348,945	334,102
Duke Realty Limited Partnership [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss) attributable to common shareholders/unitholders, Basic	$ 454,142	$ 129,381	$ 520,085	$ 148,314
Participating Securities, Distributed and Undistributed Earnings (Loss), Basic	(589)	(646)	(1,209)	(1,289)
Basic Net Income (Loss) Attributable To Common Stockholders, Basic	$ 453,553	$ 128,735	$ 518,876	$ 147,025
Weighted average number of common shares/units outstanding, Basic	348,728	336,139	348,511	333,828
Other potential dilutive shares/units	433	275	434	274
Weighted average number of common shares/units and potential dilutive securities	349,161	336,414	348,945	334,102

Net Income (Loss) Per Common 40

Net Income (Loss) Per Common Share (Computation of Anti-Dilutive Common Shares) (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities	997	1,215	997	1,215
Participating Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities	3,463	3,830	3,463	3,830

Segment Reporting Summary of Re

Segment Reporting Summary of Revenues (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015USD ($)	Jun. 30, 2014USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2014USD ($)
Segment Reporting, Revenue Reconciling Item [Line Items]
Number of Reportable Segments			4
Rental and related revenue	$ 201,996	$ 204,780	$ 416,611	$ 413,426
General contractor and service fee revenue	23,901	69,512	76,722	125,332
Revenues	225,897	274,292	493,333	538,758
Disposal Group, Including Discontinued Operation, Revenue	49	29,331	32,164	59,403
Total Revenues Including Revenues Related To Discontinued Operations	225,946	303,623	525,497	598,161
Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	223,353	272,944	488,965	536,431
Operating Segments [Member] | Industrial [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Rental and related revenue	135,487	128,263	283,115	261,554
Operating Segments [Member] | Medical Office [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Rental and related revenue	40,274	34,954	80,302	68,264
Operating Segments [Member] | Office [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Rental and related revenue	23,691	38,586	48,826	77,565
Operating Segments [Member] | All Other Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Rental and related revenue	0	1,629	0	3,716
Operating Segments [Member] | Service Operations [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
General contractor and service fee revenue	23,901	69,512	76,722	125,332
Corporate, Non-Segment [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Rental and related revenue	2,544	1,348	4,368	2,327
Disposal Group, Including Discontinued Operation, Revenue	$ 49	$ 29,331	$ 32,164	$ 59,403

Segment Reporting (Summary of N

Segment Reporting (Summary of Net Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Straight line rental income and expenses, net			$ 12,775	$ 10,892
Income (Loss) from Equity Method Investments	$ 15,123	$ 60,826	21,369	63,147
Interest expense	(42,976)	(51,448)	(92,567)	(103,306)
Depreciation and amortization on continuing operations	(78,334)	(88,500)	(160,237)	(176,798)
Gain on sale of properties	107,410	70,318	130,894	86,171
Asset Impairment Charges	(5,470)	(2,523)	(5,470)	(2,523)
Interest and other income, net	1,375	229	1,713	580
General and administrative expenses	(19,238)	(10,365)	(36,242)	(25,059)
Gain on land sales	17,012	3,889	22,437	4,041
Other operating expenses	(1,555)	(1,987)	(3,112)	(4,203)
Gains (Losses) on Extinguishment of Debt	(82,653)	(139)	(82,653)	(139)
Acquisition-related activity	(1,305)	(747)	(1,333)	(761)
Income from continuing operations before income taxes	55,707	129,115	94,626	136,663
Operating Segments [Member]
Property Level Net Operating Income – Cash Basis	138,113	124,823	271,673	242,578
Property Level Net Income, Cash Basis, Continuing Operations	140,864	141,129	283,136	274,180
Operating Segments [Member] | Industrial [Member]
Property Level Net Operating Income – Cash Basis	99,408	87,897	195,456	172,056
Operating Segments [Member] | Medical Office [Member]
Property Level Net Operating Income – Cash Basis	25,820	22,015	51,051	42,592
Operating Segments [Member] | Office [Member]
Property Level Net Operating Income – Cash Basis	12,885	13,611	25,166	25,525
Operating Segments [Member] | All Other Segments [Member]
Property Level Net Operating Income – Cash Basis	0	1,300	0	2,405
Operating Segments [Member] | Service Operations [Member]
Service Operations Net Income (loss)	2,163	5,655	7,960	14,204
Segment Reconciling Items [Member]
Sold Properties Included in Continuing Operations Net Operating Income	2,751	16,306	11,463	31,602
Straight line rental income and expenses, net	3,956	4,077	11,107	9,778
Revenues Related to Lease Buyouts	94	1,525	958	4,220
Amortization of lease incentives and market rents	(490)	(1,389)	(2,203)	(3,600)
Intercompany rents and other adjusting items	(412)	(1,355)	(872)	(2,497)
Corporate, Non-Segment [Member]
Income (Loss) from Equity Method Investments	15,123	60,826	21,369	63,147
Interest expense	(42,976)	(51,448)	(92,567)	(103,306)
Depreciation and amortization on continuing operations	(78,334)	(88,500)	(160,237)	(176,798)
Gain on sale of properties	107,410	70,318	130,894	86,171
Asset Impairment Charges	(5,470)	(2,523)	(5,470)	(2,523)
Interest and other income, net	1,375	229	1,713	580
General and administrative expenses	(19,238)	(10,365)	(36,242)	(25,059)
Gain on land sales	17,012	3,889	22,437	4,041
Other operating expenses	(1,555)	(1,987)	(3,112)	(4,203)
Gains (Losses) on Extinguishment of Debt	(82,653)	(139)	(82,653)	(139)
Acquisition-related activity	(1,305)	(747)	(1,333)	(761)
Other non-segment income	$ 143	$ (80)	$ (259)	$ (772)

Segment Reporting (Reportable S

Segment Reporting (Reportable Segments Consolidated Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Total Assets	$ 7,114,521	$ 7,754,839
Corporate, Non-Segment [Member]
Total Assets	586,073	365,030
Operating Segments [Member]
Total Assets	6,528,448	7,389,809
Operating Segments [Member] | Industrial [Member]
Total Assets	4,510,800	4,677,047
Operating Segments [Member] | Medical Office [Member]
Total Assets	1,226,567	1,229,632
Operating Segments [Member] | Office [Member]
Total Assets	654,467	1,252,627
Operating Segments [Member] | All Other Segments [Member]
Total Assets	0	71,741
Operating Segments [Member] | Service Operations [Member]
Total Assets	$ 136,614	$ 158,762

Discontinued Operations and A44

Discontinued Operations and Assets Held for Sale (Table Illustration of Number of Properties in Discontinued Operations) (Details) - buildings	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Number of properties held for sale in discontinued operations	0
Number of properties sold in discontinued operations	62	12
Total number of properties in discontinued operations	74
Continuing Operations, Number of In-service Properties Held for Sale	9
Continuing Operations, Number of Real Estate Properties Sold	62	17
Continuing Operations, Number of Real Estate Properties Sold or Classified as Held for Sale	88
Number of Real Estate Properties Held for Sale	9
Number of Real Estate Properties Sold	124	29
Total Properties Sold or Classified as Held for Sale	162
Industrial [Member]
Number of properties held for sale in discontinued operations	0
Number of properties sold in discontinued operations	5	11
Total number of properties in discontinued operations	16
Office [Member]
Number of properties held for sale in discontinued operations	0
Number of properties sold in discontinued operations	56	0
Total number of properties in discontinued operations	56
Medical Office [Member]
Number of properties held for sale in discontinued operations	0
Number of properties sold in discontinued operations	1	1
Total number of properties in discontinued operations	2

Discontinued Operations and A45

Discontinued Operations and Assets Held for Sale (Table Illustration of Discontinued Operations in Income Statement) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Discontinued Operations
Revenues	$ 49	$ 29,331	$ 32,164	$ 59,403
Operating Expenses	(13)	(11,101)	(12,399)	(23,504)
Depreciation and amortization, discontinued operations	0	(9,141)	(3,517)	(19,107)
Operating Income (Loss)	36	9,089	16,248	16,792
Interest Expense	0	(3,618)	(6,053)	(7,399)
Income (loss) before gain on sales	36	5,471	10,195	9,393
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	399,390	8,322	427,924	31,996
Discontinued Operation, Tax Effect of Discontinued Operation	(3,220)	(546)	(3,220)	(3,523)
Income (loss) from discontinued operations	396,170	7,776	424,704	28,473
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	$ 399,354	$ 2,851	417,729	22,603
Payments For Second Generation Tenant Improvements Leasing Costs And Building Improvements			30,871	44,367
Discontinued Operations [Member]
Discontinued Operations
Payments For Second Generation Tenant Improvements Leasing Costs And Building Improvements			$ 7,400	$ 9,900

Discontinued Operations and A46

Discontinued Operations and Assets Held for Sale (Allocation of Shareholders' Income (Loss) Between Continuing and Discontinued Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Discontinued Operations
Income (loss) from continuing operations attributable to common shareholders	$ 57,333	$ 120,013	$ 94,382	$ 118,272
Income (loss) from discontinued operations attributable to common shareholders	392,047	7,675	420,242	28,099
Net income (loss) attributable to common shareholders/unitholders	$ 449,380	$ 127,688	$ 514,624	$ 146,371

Discontinued Operations and A47

Discontinued Operations and Assets Held for Sale (Aggregate Balance Sheet of Properties Held for Sale Included in Discontinued Operations) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2015USD ($)abuildings	Dec. 31, 2014USD ($)
Held for Sale Assets in Continuing and Discontinued Operations
Land and Land Improvements Held-for-Sale		$ 148,268
Buildings and Tenant Improvements Held-for-Sale		758,323
Inventory, Land Held-for-sale		12,443
Accumulated Depreciation of Assets Held-for-Sale		(270,340)
Lease Related Assets, Held for Sale		48,320
Other assets		28,037
Total assets held-for-sale	$ 72,384	725,051
Disposal Groups, Secured Debt Related to Assets Held for Sale	0	40,764
Accrued expenses		5,413
Other liabilities		12,915
Total liabilities held-for-sale	$ 3,742	59,092
Discontinued Operation, Number of Real Estate Properties Held for Sale | buildings	0
Continuing Operations, Number of In-service Properties Held for Sale | buildings	9
Area of Land | a	57
Continuing Operations [Member]
Held for Sale Assets in Continuing and Discontinued Operations
Land and Land Improvements Held-for-Sale	$ 13,443	21,347
Buildings and Tenant Improvements Held-for-Sale	94,443	36,925
Inventory, Land Held-for-sale	2,696	12,443
Accumulated Depreciation of Assets Held-for-Sale	(46,891)	(23,071)
Lease Related Assets, Held for Sale	4,393	3,480
Other assets	4,300	562
Total assets held-for-sale	72,384	51,686
Disposal Groups, Secured Debt Related to Assets Held for Sale	0	0
Accrued expenses	1,885	233
Other liabilities	1,857	434
Total liabilities held-for-sale	$ 3,742	667
Discontinued Operations [Member]
Held for Sale Assets in Continuing and Discontinued Operations
Land and Land Improvements Held-for-Sale		126,921
Buildings and Tenant Improvements Held-for-Sale		721,398
Inventory, Land Held-for-sale		0
Accumulated Depreciation of Assets Held-for-Sale		(247,269)
Lease Related Assets, Held for Sale		44,840
Other assets		27,475
Total assets held-for-sale		673,365
Disposal Groups, Secured Debt Related to Assets Held for Sale		40,764
Accrued expenses		5,180
Other liabilities		12,481
Total liabilities held-for-sale		$ 58,425
Land [Member]
Held for Sale Assets in Continuing and Discontinued Operations
Area of Land | a	29

Subsequent Events (Details)

Subsequent Events (Details) - 3 months ended Sep. 30, 2015 - Declaration of Dividends [Member] - Common Stock [Member] - $ / shares	Total
Subsequent Event [Line Items]
Common stock dividends declared per share	$ 0.17
Record date	Aug. 14, 2015
Payment date	Aug. 31, 2015