Duke Realty Limited PARTNERSHIP 10-Q 28 Oct 16 2016 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Oct. 26, 2016
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	Sep. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		354,693,496
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	Sep. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
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	Sep. 30, 2016	Dec. 31, 2015
ASSETS
Land and improvements	$ 1,494,196	$ 1,391,763
Buildings and tenant improvements	4,919,897	4,740,837
Construction in progress	290,647	321,062
Investments in and advances to unconsolidated companies	261,447	268,390
Undeveloped land	316,369	383,045
Real estate investment property, at cost, total	7,282,556	7,105,097
Accumulated depreciation	(1,282,033)	(1,192,425)
Net real estate investments	6,000,523	5,912,672
Real estate investments and other assets held-for-sale	18,184	45,801
Cash and cash equivalents	110,211	22,533
Accounts receivable, net of allowance	26,180	18,846
Straight-line rent receivable, net of allowance	118,594	116,781
Receivables on construction contracts, including retentions	8,528	16,459
Deferred leasing and other costs, net of accumulated amortization	335,109	346,374
Escrow deposits and other assets	244,752	416,049
Total Assets	6,862,081	6,895,515
LIABILITIES AND EQUITY
Secured debt, net of deferred financing costs	385,763	738,444
Unsecured debt, net of deferred financing costs	2,605,288	2,510,697
Unsecured line of credit	0	71,000
Long-term debt, total	2,991,051	3,320,141
Liabilities related to real estate investments held-for-sale	238	972
Construction payables and amounts due subcontractors, including retentions	51,339	54,921
Accrued real estate taxes	93,722	71,617
Accrued interest	30,601	34,447
Other accrued expenses	41,314	61,827
Other liabilities	103,602	106,283
Tenant security deposits and prepaid rents	41,292	40,506
Total Liabilities	3,353,159	3,690,714
Equity
Common shares	3,546	3,453
Additional paid-in capital	5,187,374	4,961,923
Accumulated other comprehensive income	938	1,806
Distributions in excess of net income	(1,710,215)	(1,785,250)
Total shareholders' equity	3,481,643	3,181,932
Noncontrolling interests	27,279	22,869
Total Equity	3,508,922	3,204,801
Total Liabilities and Equity	6,862,081	6,895,515
Duke Realty Limited Partnership [Member]
ASSETS
Land and improvements	1,494,196	1,391,763
Buildings and tenant improvements	4,919,897	4,740,837
Construction in progress	290,647	321,062
Investments in and advances to unconsolidated companies	261,447	268,390
Undeveloped land	316,369	383,045
Real estate investment property, at cost, total	7,282,556	7,105,097
Accumulated depreciation	(1,282,033)	(1,192,425)
Net real estate investments	6,000,523	5,912,672
Real estate investments and other assets held-for-sale	18,184	45,801
Cash and cash equivalents	110,211	22,533
Accounts receivable, net of allowance	26,180	18,846
Straight-line rent receivable, net of allowance	118,594	116,781
Receivables on construction contracts, including retentions	8,528	16,459
Deferred leasing and other costs, net of accumulated amortization	335,109	346,374
Escrow deposits and other assets	244,752	416,049
Total Assets	6,862,081	6,895,515
LIABILITIES AND EQUITY
Secured debt, net of deferred financing costs	385,763	738,444
Unsecured debt, net of deferred financing costs	2,605,288	2,510,697
Unsecured line of credit	0	71,000
Long-term debt, total	2,991,051	3,320,141
Liabilities related to real estate investments held-for-sale	238	972
Construction payables and amounts due subcontractors, including retentions	51,339	54,921
Accrued real estate taxes	93,722	71,617
Accrued interest	30,601	34,447
Other accrued expenses	41,314	61,827
Other liabilities	103,602	106,283
Tenant security deposits and prepaid rents	41,292	40,506
Total Liabilities	3,353,159	3,690,714
Equity
Common equity	3,480,705	3,180,126
General Partners' equity	3,480,705	3,180,126
Limited Partners' common equity	24,478	20,032
Accumulated other comprehensive income	938	1,806
Total partners' equity	3,506,121	3,201,964
Noncontrolling interests	2,801	2,837
Total Equity	3,508,922	3,204,801
Total Liabilities and Equity	$ 6,862,081	$ 6,895,515

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Accounts receivable, allowance	$ 1,185	$ 1,113
Straight-line rent receivable, allowance	6,664	6,155
Deferred leasing and other costs, accumulated amortization	255,300	245,426
Deferred Finance Costs, Net	$ 24,754	$ 21,598
Common shares, par value	$ 0.01	$ 0.01
Common shares, shares authorized	600,000,000	600,000,000
Common shares, shares issued	354,616,000	345,285,000
Common shares, shares outstanding	354,616,000	345,285,000
Duke Realty Limited Partnership [Member]
Accounts receivable, allowance	$ 1,185	$ 1,113
Straight-line rent receivable, allowance	6,664	6,155
Deferred leasing and other costs, accumulated amortization	$ 255,300	$ 245,426
Common equity, General Partner Units issued	354,616,000	345,285,000
Common equity, General Partner Units outstanding	354,616,000	345,285,000
Limited Partner Units issued	3,427,000	3,487,000
Limited Partner Units outstanding	3,427,000	3,487,000
Secured Debt [Member]
Deferred Finance Costs, Net	$ 1,062	$ 1,552
Secured Debt [Member] | Duke Realty Limited Partnership [Member]
Deferred Finance Costs, Net	1,062	1,552
Unsecured Debt [Member]
Deferred Finance Costs, Net	23,692	20,046
Unsecured Debt [Member] | Duke Realty Limited Partnership [Member]
Deferred Finance Costs, Net	$ 23,692	$ 20,046

Consolidated Statements of Oper

Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues:
Rental and related revenue	$ 206,848	$ 200,938	$ 609,171	$ 617,549
General contractor and service fee revenue	19,351	33,599	68,546	110,320
Revenues, total	226,199	234,537	677,717	727,869
Expenses:
Rental expenses	26,084	30,137	81,092	96,355
Real estate taxes	31,313	27,702	90,888	86,228
General contractor and other services expenses	17,182	29,694	60,330	98,455
Depreciation and amortization	80,688	79,898	238,647	240,135
Costs and expenses, total	155,267	167,431	470,957	521,173
Other operating activities:
Equity in earnings (loss) of unconsolidated companies	12,010	(5,088)	37,404	16,281
Gain on dissolution of unconsolidated company	0	0	30,697	0
Promote income	2,212	0	26,299	0
Gain on sale of properties	82,698	71,259	137,589	202,153
Gain on land sales	1,601	1,659	2,438	24,096
Other operating expenses	(1,424)	(1,467)	(3,496)	(4,579)
Impairment charges	(3,042)	(2,426)	(15,098)	(7,896)
General and administrative expenses	(12,534)	(11,340)	(42,216)	(47,582)
Other Operating Activities, Net	81,521	52,597	173,617	182,473
Operating income	152,453	119,703	380,377	389,169
Other income (expenses):
Interest and other income, net	507	1,343	3,597	3,056
Interest expense	(34,606)	(41,615)	(109,520)	(134,576)
Loss on debt extinguishment	(6,243)	64	(8,673)	(82,589)
Acquisition-related activity	(7)	(5,660)	(82)	(6,993)
Income from continuing operations before income taxes	112,104	73,835	265,699	168,067
Income tax benefit	359	3,305	173	4,109
Income from continuing operations	112,463	77,140	265,872	172,176
Discontinued operations:
Income (loss) before gain on sales	377	(43)	741	10,546
Gain on sale of depreciable properties, net of tax	319	111	485	414,620
Income from discontinued operations	696	68	1,226	425,166
Net income	113,159	77,208	267,098	597,342
Net income attributable to noncontrolling interests	(1,145)	(774)	(2,710)	(6,284)
Net income attributable to common shareholders	$ 112,014	$ 76,434	$ 264,388	$ 591,058
Basic net income per common share/unit:
Continuing operations attributable to common shareholders/unitholders	$ 0.32	$ 0.22	$ 0.75	$ 0.49
Discontinued operations attributable to common shareholders/unitholders	0	0	0	1.22
Total	0.32	0.22	0.75	1.71
Diluted net income per common share/unit:
Continuing operations attributable to common shareholders/unitholders	0.32	0.22	0.75	0.49
Discontinued operations attributable to common shareholders/unitholders	0	0	0	1.21
Total	$ 0.32	$ 0.22	$ 0.75	$ 1.70
Weighted average number of common shares/units outstanding	351,856	345,256	348,341	344,986
Weighted average number of common shares/units and potential dilutive securities	358,981	352,150	355,405	352,013
Comprehensive income:
Net income	$ 113,159	$ 77,208	$ 267,098	$ 597,342
Other comprehensive loss:
Amortization of interest contracts	(255)	(274)	(845)	(837)
Other Comprehensive Income, Other, Net of Tax	(23)	0	(23)	(123)
Total other comprehensive loss	(278)	(274)	(868)	(960)
Comprehensive income	112,881	76,934	266,230	596,382
Duke Realty Limited Partnership [Member]
Revenues:
Rental and related revenue	206,848	200,938	609,171	617,549
General contractor and service fee revenue	19,351	33,599	68,546	110,320
Revenues, total	226,199	234,537	677,717	727,869
Expenses:
Rental expenses	26,084	30,137	81,092	96,355
Real estate taxes	31,313	27,702	90,888	86,228
General contractor and other services expenses	17,182	29,694	60,330	98,455
Depreciation and amortization	80,688	79,898	238,647	240,135
Costs and expenses, total	155,267	167,431	470,957	521,173
Other operating activities:
Equity in earnings (loss) of unconsolidated companies	12,010	(5,088)	37,404	16,281
Gain on dissolution of unconsolidated company	0	0	30,697	0
Promote income	2,212	0	26,299	0
Gain on sale of properties	82,698	71,259	137,589	202,153
Gain on land sales	1,601	1,659	2,438	24,096
Other operating expenses	(1,424)	(1,467)	(3,496)	(4,579)
Impairment charges	(3,042)	(2,426)	(15,098)	(7,896)
General and administrative expenses	(12,534)	(11,340)	(42,216)	(47,582)
Other Operating Activities, Net	81,521	52,597	173,617	182,473
Operating income	152,453	119,703	380,377	389,169
Other income (expenses):
Interest and other income, net	507	1,343	3,597	3,056
Interest expense	(34,606)	(41,615)	(109,520)	(134,576)
Loss on debt extinguishment	(6,243)	64	(8,673)	(82,589)
Acquisition-related activity	(7)	(5,660)	(82)	(6,993)
Income from continuing operations before income taxes	112,104	73,835	265,699	168,067
Income tax benefit	359	3,305	173	4,109
Income from continuing operations	112,463	77,140	265,872	172,176
Discontinued operations:
Income (loss) before gain on sales	377	(43)	741	10,546
Gain on sale of depreciable properties, net of tax	319	111	485	414,620
Income from discontinued operations	696	68	1,226	425,166
Net income	113,159	77,208	267,098	597,342
Noncontrolling Interest in Net Income (Loss) Joint Venture Partners, NonRedeemable	(14)	(23)	(40)	(72)
Net income attributable to common shareholders	$ 113,145	$ 77,185	$ 267,058	$ 597,270
Basic net income per common share/unit:
Continuing operations attributable to common shareholders/unitholders	$ 0.32	$ 0.22	$ 0.75	$ 0.49
Discontinued operations attributable to common shareholders/unitholders	0	0	0	1.22
Total	0.32	0.22	0.75	1.71
Diluted net income per common share/unit:
Continuing operations attributable to common shareholders/unitholders	0.32	0.22	0.75	0.49
Discontinued operations attributable to common shareholders/unitholders	0	0	0	1.21
Total	$ 0.32	$ 0.22	$ 0.75	$ 1.70
Weighted average number of common shares/units outstanding	355,351	348,760	351,840	348,595
Weighted average number of common shares/units and potential dilutive securities	358,981	352,150	355,405	352,013
Comprehensive income:
Net income	$ 113,159	$ 77,208	$ 267,098	$ 597,342
Other comprehensive loss:
Amortization of interest contracts	(255)	(274)	(845)	(837)
Other Comprehensive Income, Other, Net of Tax	(23)	0	(23)	(123)
Total other comprehensive loss	(278)	(274)	(868)	(960)
Comprehensive income	$ 112,881	$ 76,934	$ 266,230	$ 596,382

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net income	$ 267,098	$ 597,342
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	191,554	192,135
Amortization of deferred leasing and other costs	47,093	51,517
Amortization of deferred financing costs	3,998	5,543
Straight-line rental income and expense, net	(10,832)	(18,498)
Impairment charges	15,098	7,896
Loss on debt extinguishment	8,673	82,589
Gain on dissolution of unconsolidated company	(30,697)	0
Gains on land and depreciated property sales	(140,512)	(644,044)
Third-party construction contracts, net	5,601	(3,805)
Other accrued revenues and expenses, net	14,773	7,129
Operating distributions received in excess of (less than) equity in earnings from unconsolidated companies	(24,476)	414
Net cash provided by operating activities	347,371	278,218
Cash flows from investing activities:
Development of real estate investments	(308,199)	(221,201)
Acquisition of real estate investments and related intangible assets	(16,029)	(28,849)
Acquisition of undeveloped land	(77,593)	(39,881)
Second generation tenant improvements, leasing costs and building improvements	(39,169)	(45,688)
Other deferred leasing costs	(25,949)	(26,940)
Other assets	164,450	(38,104)
Proceeds from land and depreciated property sales, net	369,118	1,534,177
Capital distributions from unconsolidated companies	52,514	68,915
Capital contributions and advances to unconsolidated companies	(54,853)	(55,020)
Net cash provided by investing activities	64,290	1,147,409
Cash flows from financing activities:
Proceeds from issuance of common shares, net	217,513	4,592
Proceeds from Issuance of Unsecured Debt	375,000	0
Payments on unsecured debt	(285,339)	(759,948)
Payments on secured indebtedness including principal amortization	(352,723)	(221,085)
Repayments of line of credit, net	(71,000)	(106,000)
Distributions to common shareholders/unitholders	(187,885)	(175,967)
Contributions from (distributions to) Noncontrolling Interest, Net	(1,955)	(1,403)
Change in book overdrafts	(11,025)	(7,754)
Deferred financing costs	(6,569)	(110)
Net cash used for financing activities	(323,983)	(1,267,675)
Net increase in cash and cash equivalents	87,678	157,952
Cash and cash equivalents at beginning of period	22,533	17,922
Cash and cash equivalents at end of period	110,211	175,874
Noncash investing and financing activities:
Mortgage notes receivable from buyers in property sales	1,685	204,428
Conversion of Limited Partner Units to common shares	1,015	2,416
Duke Realty Limited Partnership [Member]
Cash flows from operating activities:
Net income	267,098	597,342
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	191,554	192,135
Amortization of deferred leasing and other costs	47,093	51,517
Amortization of deferred financing costs	3,998	5,543
Straight-line rental income and expense, net	(10,832)	(18,498)
Impairment charges	15,098	7,896
Loss on debt extinguishment	8,673	82,589
Gain on dissolution of unconsolidated company	(30,697)	0
Gains on land and depreciated property sales	(140,512)	(644,044)
Third-party construction contracts, net	5,601	(3,805)
Other accrued revenues and expenses, net	14,773	6,949
Operating distributions received in excess of (less than) equity in earnings from unconsolidated companies	(24,476)	414
Net cash provided by operating activities	347,371	278,038
Cash flows from investing activities:
Development of real estate investments	(308,199)	(221,201)
Acquisition of real estate investments and related intangible assets	(16,029)	(28,849)
Acquisition of undeveloped land	(77,593)	(39,881)
Second generation tenant improvements, leasing costs and building improvements	(39,169)	(45,688)
Other deferred leasing costs	(25,949)	(26,940)
Other assets	164,450	(38,104)
Proceeds from land and depreciated property sales, net	369,118	1,534,177
Capital distributions from unconsolidated companies	52,514	68,915
Capital contributions and advances to unconsolidated companies	(54,853)	(55,020)
Net cash provided by investing activities	64,290	1,147,409
Cash flows from financing activities:
Contributions from the General Partner	217,513	4,772
Proceeds from Issuance of Unsecured Debt	375,000	0
Payments on unsecured debt	(285,339)	(759,948)
Payments on secured indebtedness including principal amortization	(352,723)	(221,085)
Repayments of line of credit, net	(71,000)	(106,000)
Distributions to common shareholders/unitholders	(189,764)	(177,815)
Contributions from (distributions to) Noncontrolling Interest, Net	(76)	445
Change in book overdrafts	(11,025)	(7,754)
Deferred financing costs	(6,569)	(110)
Net cash used for financing activities	(323,983)	(1,267,495)
Net increase in cash and cash equivalents	87,678	157,952
Cash and cash equivalents at beginning of period	22,533	17,922
Cash and cash equivalents at end of period	110,211	175,874
Noncash investing and financing activities:
Mortgage notes receivable from buyers in property sales	1,685	204,428
Conversion of Limited Partner Units to common shares	$ 1,015	$ 2,416

Consolidated Statement of Chang

Consolidated Statement of Changes in Equity - 9 months ended Sep. 30, 2016 - 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 Partners' Common Equity [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, 2015	$ 3,204,801	$ 3,453	$ 4,961,923	$ 1,806	$ (1,785,250)	$ 22,869
Beginning Balance - Partnership at Dec. 31, 2015							$ 3,204,801	$ 3,180,126	$ 20,032	$ 1,806	$ 2,837	$ 3,201,964
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	267,098				264,388	2,710	267,098	264,388	2,670		40	267,058
Other comprehensive loss	(868)			(868)			(868)			(868)		(868)
Issuance of common shares	217,513	84	217,429
Capital contribution from the General Partner							217,513	217,513				217,513
Stock based compensation plan activity	10,218	8	7,008		(1,468)	4,670	10,218	5,548	4,670			10,218
Conversion of Limited Partner Units		1	1,014			(1,015)		1,015	(1,015)
Distributions to Partners							(189,764)	(187,885)	(1,879)			(189,764)
Distributions to common shareholders	(187,885)				(187,885)
Distributions to noncontrolling interests	(1,955)					(1,955)	(76)				(76)
Ending Balance - General Partner at Sep. 30, 2016	$ 3,508,922	$ 3,546	$ 5,187,374	$ 938	$ (1,710,215)	$ 27,279
Ending Balance - Partnership at Sep. 30, 2016							$ 3,508,922	$ 3,480,705	$ 24,478	$ 938	$ 2,801	$ 3,506,121

Consolidated Statement of Chan7

Consolidated Statement of Changes in Equity (Parenthetical)	9 Months Ended
	Sep. 30, 2016$ / shares
Distributions to common shareholders, per share	$ 0.54
Duke Realty Limited Partnership [Member]
Distributions to Partners, per Common Unit	$ 0.54

General Basis of Presentation (

General Basis of Presentation (Notes)	9 Months Ended
	Sep. 30, 2016
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 the General Partner and the Partnership. The 2015 year-end consolidated balance sheet data included in 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, 2015 (the " 2015 Annual Report"), 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 2015 Annual Report. The General Partner was formed in 1985, and we believe that it qualifies as a 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 Units at September 30, 2016 . The remaining 1.0% of 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. As of September 30, 2016 , we owned and operated a portfolio consisting primarily of industrial and medical office properties and provided 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)	9 Months Ended
	Sep. 30, 2016
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 Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("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 an entity expects to be entitled in exchange for fulfilling those performance obligations. 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. ASU 2014-09 allows for either full or modified retrospective adoption. We have begun to evaluate each of our revenue streams under the new standard and the pattern of recognition is not expected to change significantly. Additionally, we have primarily disposed of property and land in all cash transactions with no contingencies and no future involvement in the operations, and therefore, do not expect the new standard to significantly impact the recognition of property and land sales. We have not yet selected a transition method. Consolidation In February 2015, the FASB issued ASU 2015-02, Amendments to the Consolidation Analysis ("ASU 2015-02"). ASU 2015-02 made targeted amendments to the current consolidation guidance and ended the deferral granted to investment companies from applying the existing variable interest entity ("VIE") guidance. ASU 2015-02 was effective for public entities for annual and interim reporting periods beginning after December 15, 2015. We adopted ASU 2015-02 during the three months ended March 31, 2016, and it has not had a significant impact 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 required that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability. ASU 2015-03 was effective for us retrospectively for financial statements issued for annual and interim reporting periods beginning after December 15, 2015. We adopted ASU 2015-03 during the three months ended March 31, 2016. Debt issuance costs related to the Partnership's unsecured line of credit continue to be presented as assets in the consolidated balance sheets, as part of escrow deposits and other assets, pursuant to ASU 2015-15, Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements . Business Combinations In September 2015, the FASB issued ASU 2015-16, Business Combinations - Simplifying the Accounting for Measurement-Period Adjustments ("ASU 2015-16"). ASU 2015-16 amended the retroactive requirement to apply adjustments made to provisional amounts recognized in a business combination. The update required that the acquirer record, in the same period’s financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. ASU 2015-16 was effective for annual and interim periods beginning after December 15, 2015. We adopted ASU 2015-16 during the three months ended March 31, 2016 and it has not had a significant impact on our consolidated financial statements. Leases In February 2016, the FASB issued ASU 2016-02, Leases ("ASU 2016-02"), which sets out the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e. lessees and lessors). ASU 2016-02 supersedes existing leasing standards. ASU 2016-02 requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase of the leased asset by the lessee. This classification will determine whether the lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. ASU 2016-02 requires lessors to account for leases using an approach that is substantially equivalent to existing guidance for sales-type leases, direct financing leases and operating leases. ASU 2016-02 also requires that lessors expense certain initial direct costs, which are capitalizable under existing leasing standards, as incurred. ASU 2016-02 is effective for us retrospectively for annual and interim reporting periods beginning after December 15, 2018, with early adoption permitted. A set of practical expedients for implementation, which must be elected as a package and for all leases, may also be elected. These practical expedients include relief from re-assessing lease classification at the adoption date for expired or existing leases, although a right-of-use asset and lease liability would still be recorded for such leases. We are currently assessing the method of adoption and the impact that ASU 2016-02 will have on our consolidated financial statements. Stock Based Compensation In March 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Accounting ("ASU 2016-09"). ASU 2016-09 requires that all excess tax benefits and tax deficiencies related to stock based compensation arrangements must be recognized in the income statement as they occur as opposed to the current guidance where excess tax benefits are recorded in equity. ASU 2016-09 also allows entities to make an accounting policy election to either continue to estimate forfeitures on stock based compensation arrangements or to account for forfeitures as they occur. ASU 2016-09 is effective for annual and interim reporting periods beginning after December 15, 2016 with early adoption permitted. We do not believe ASU 2016-09 will have a material impact on our consolidated financial statements. Statement of Cash Flows In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows ("ASU 2016-15"). ASU 2016-15 clarifies how entities should classify certain cash receipts and cash payments on the statement of cash flows and how the predominance principle should be applied when cash receipts and cash payments have aspects of more than one class of cash flows. ASU 2016-15 is effective for us retrospectively for annual and interim reporting periods beginning after December 15, 2017 with early adoption permitted. We do not believe ASU 2016-15 will have a material impact on our consolidated financial statements.

Reclassifications

Reclassifications	9 Months Ended
	Sep. 30, 2016
Disclosure Text Block [Abstract]
Reclassifications	Reclassifications Certain amounts in the accompanying consolidated financial statements for 2015 , including the change in presentation of deferred financing costs pursuant to ASU 2015-03, have been reclassified to conform to the 2016 consolidated financial statement presentation.

Variable Interest Entities

Variable Interest Entities	9 Months Ended
	Sep. 30, 2016
Disclosure Text Block [Abstract]
Consolidation Policy for VIEs	Variable Interest Entities Partnership As the result of the adoption of ASU 2015-02, which stipulates that limited partnerships (and similar entities) where the limited partners do not have substantive participating or kick-out rights are VIEs, we determined that the Partnership is a VIE. Prior to the adoption of ASU 2015-02, the General Partner consolidated the Partnership pursuant to the voting interest model. We concluded that, because it holds majority ownership and exercises control over every aspect of the Partnership's operations, the General Partner is the primary beneficiary of the Partnership and, as such, will continue to consolidate the Partnership. The assets and liabilities of the General Partner and the Partnership are substantially the same, as the General Partner does not have any significant assets other than its investment in the Partnership. All of the Company's debt is also an obligation of the Partnership. Unconsolidated Joint Ventures 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 VIEs 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 limited partners (or similar owning entities) that lack substantive participating or kick out rights, 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 interests 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 unconsolidated joint ventures, in which we have any recognized assets or liabilities or have retained any economic exposure to loss at September 30, 2016 that met the criteria to be considered VIEs. Our maximum loss exposure for guarantees of joint venture indebtedness, none of which relate to VIEs, totaled $52.7 million at September 30, 2016 .

Acquisitions and Dispositions

Acquisitions and Dispositions	9 Months Ended
	Sep. 30, 2016
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 the product types and markets in which we operate. 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 two properties during the nine months ended September 30, 2016 , which included a property received as part of a non-cash distribution in connection with the dissolution of an unconsolidated joint venture. The following table summarizes amounts recognized for each major class of asset and liability (in thousands) for these acquisitions during the nine months ended September 30, 2016 : Real estate assets $ 72,824 Lease related intangible assets 6,427 Fair value of acquired net assets $ 79,251 Acquired leases had an average remaining life at acquisition of approximately 8.9 years. We have included $2.1 million in rental revenues and a net loss of $28,000 in continuing operations during the nine months ended September 30, 2016 for the properties since their respective dates of acquisition. Distribution of Joint Venture Properties Included in our property acquisitions for the nine months ended September 30, 2016 was an industrial property that we received as part of a non-cash distribution of properties from Duke/Hulfish LLC ("Duke/Hulfish"), a 20% owned unconsolidated joint venture. On June 30, 2016, as part of a plan of dissolution, Duke/Hulfish distributed its ownership in seven properties to our partner in the joint venture while distributing its ownership interest in one property to us. We also received $2.8 million in cash from the joint venture in order to balance the value of the distributions received in accordance with the applicable ownership percentages. As the result of this dissolution transaction, we recognized a gain equal to the excess of the fair value of the one property distributed to us, plus the cash that we received, over the carrying value of our 20% investment in the eight properties that were distributed from Duke/Hulfish (both to us and our partner). The computation of this gain is shown as follows (in thousands): Fair value of one property received in non-cash distribution $ 63,000 Cash received at dissolution 2,760 Carrying value of investment in properties distributed to partners (35,063 ) Gain on dissolution of unconsolidated company $ 30,697 In connection with the dissolution of Duke/Hulfish, and the sale of its final property to a third party in July 2016, we recognized promote income (additional incentive-based cash distributions from the joint venture, in excess of our 20% ownership interest) totaling $26.3 million for the nine months ended September 30, 2016 . Fair Value Measurements The fair value estimates used in allocating the aggregate purchase price of an acquisition, to the extent accounted for as a business combination, 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 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 nine months ended September 30, 2016 are as follows: Low High Discount rate 7.46% 8.10% Exit capitalization rate 6.46% 6.96% Lease-up period (months) 12 12 Net rental rate per square foot - Industrial $3.39 $3.39 Net rental rate per square foot - Medical Office $15.40 $15.40 Acquisition-Related Activity The acquisition-related activity in our consolidated Statements of Operations and Comprehensive Income consisted of adjustments to the fair value of contingent consideration from acquisitions after the measurement period was complete and transaction costs for completed acquisitions. 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 $369.1 million and $1.53 billion during the nine months ended September 30, 2016 and 2015 , respectively.

Indebtedness

Indebtedness	9 Months Ended
	Sep. 30, 2016
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 (in thousands): Book Value at 12/31/2015 Book Value at 9/30/2016 Fair Value at 12/31/2015 Issuances and Assumptions Payments/Payoffs Adjustments to Fair Value Fair Value at 9/30/2016 Fixed rate secured debt $ 736,896 $ 384,025 $ 789,095 $ — $ (352,382 ) $ (11,765 ) $ 424,948 Variable rate secured debt 3,100 2,800 3,100 — (300 ) — 2,800 Unsecured debt 2,530,743 2,628,980 2,624,795 375,000 (276,764 ) 93,015 2,816,046 Unsecured line of credit 71,000 — 70,852 — (71,000 ) 148 — Total $ 3,341,739 $ 3,015,805 $ 3,487,842 $ 375,000 $ (700,446 ) $ 81,398 $ 3,243,794 Less: Deferred financing costs 21,598 24,754 Total indebtedness as reported on the consolidated balance sheets $ 3,320,141 $ 2,991,051 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 2.50% to 3.30% , 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 nine months ended September 30, 2016 , we repaid five loans, totaling $346.4 million , which had a weighted average stated rate of 5.90% . Unsecured Debt At September 30, 2016 , 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 103.00% to 137.00% of face value. During the nine months ended September 30, 2016, we issued $375.0 million of senior unsecured notes that bear interest at a stated interest rate of 3.25% , have an effective interest rate of 3.36% , and mature on June 30, 2026. A portion of these proceeds were used to repurchase, through a tender offer, $72.0 million of our 5.95% Senior Unsecured Notes due February 2017 (" 5.95% Senior Unsecured Notes"), for a cash payment of $74.5 million in June 2016. In July 2016, we redeemed the remaining $203.0 million of 5.95% Senior Unsecured Notes for a cash payment of $209.0 million . Together, the repurchase and the redemption resulted in an $8.7 million loss on debt extinguishment, which included repurchase premiums, redemption premiums and the write-off of unamortized deferred financing costs. We utilize a discounted cash flow methodology in order to estimate the fair value of our $250.0 million variable rate term loan. Our estimate of the current market rate for our variable rate term loan was 1.68% and was based primarily upon level 3 inputs. To the extent that credit spreads have changed since the origination of this 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 would represent the difference between the book value and the fair value. Our estimate of a current market rate is based upon the rate, considering current market conditions and our specific credit profile, at which we estimate we could obtain similar borrowings. As our credit spreads have not changed appreciably, we believe that the contractual interest rate and the current market rate on the term loan are the same. 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 September 30, 2016 . Unsecured Line of Credit Our unsecured line of credit at September 30, 2016 is described as follows (in thousands): Description Maximum Capacity Maturity Date Outstanding Balance at September 30, 2016 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 (with extension options that could extend the maturity date to January 2020 ). 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 $1.60 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 September 30, 2016 , we were in compliance with all covenants under this line of credit. To the extent that there are outstanding borrowings, we utilize a discounted cash flow methodology in order to estimate the fair value of our unsecured line of credit. To the extent that credit spreads have changed since the origination of the line of credit, 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 would represent the difference between the book value and the fair value. Our estimate of a current market rate is based upon the rate, considering current market conditions and our specific credit profile, at which we estimate we could obtain similar borrowings. As our credit spreads have not changed appreciably, we believe that the contractual interest rate and the current market rate on the line of credit are the same. To the extent there are outstanding borrowings, this current market rate is internally estimated and therefore would be primarily based upon a level 3 input.

Shareholders' Equity Shareholde

Shareholders' Equity Shareholders' Equity	9 Months Ended
	Sep. 30, 2016
Stockholders' Equity Note [Abstract]
Shareholders' Equity	Shareholders' Equity of the General Partner and Partners' Capital of the Partnership General Partner During the nine months ended September 30, 2016 , the General Partner issued 8.3 million common shares pursuant to its at the market ("ATM") equity program, generating gross proceeds of approximately $216.2 million and, after deducting commissions and other costs, net proceeds of approximately $213.6 million . The proceeds from these offerings were contributed to the Partnership and used to fund development activities and loan repayments. 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	9 Months Ended
	Sep. 30, 2016
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 (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2016 2015 2016 2015 Management fees $ 1,035 $ 1,835 $ 3,585 $ 5,388 Leasing fees 629 692 2,061 1,714 Construction and development fees 1,307 2,247 6,666 3,377

Net Income (Loss) Per Common Sh

Net Income (Loss) Per Common Share	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Net Income (Loss) Per Common Share	Net Income Per Common Share or Common Unit Basic net income per common share or Common Unit is computed by dividing net income 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 per common share is computed by dividing the sum of basic net income 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 per Common Unit is computed by dividing the basic net income 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 (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 General Partner Net income attributable to common shareholders $ 112,014 $ 76,434 $ 264,388 $ 591,058 Less: Dividends on participating securities (580 ) (593 ) (1,751 ) (1,803 ) Basic net income attributable to common shareholders 111,434 75,841 262,637 589,255 Add back dividends on dilutive participating securities 580 593 1,751 1,803 Noncontrolling interest in earnings of common unitholders 1,131 751 2,670 6,212 Diluted net income attributable to common shareholders $ 113,145 $ 77,185 $ 267,058 $ 597,270 Weighted average number of common shares outstanding 351,856 345,256 348,341 344,986 Weighted average Limited Partner Units outstanding 3,495 3,504 3,499 3,609 Other potential dilutive shares 3,630 3,390 3,565 3,418 Weighted average number of common shares and potential dilutive securities 358,981 352,150 355,405 352,013 Partnership Net income attributable to common unitholders $ 113,145 $ 77,185 $ 267,058 $ 597,270 Less: Distributions on participating securities (580 ) (593 ) (1,751 ) (1,803 ) Basic net income attributable to common unitholders $ 112,565 $ 76,592 $ 265,307 $ 595,467 Add back distributions on dilutive participating securities 580 593 1,751 1,803 Diluted net income attributable to common unitholders $ 113,145 $ 77,185 $ 267,058 $ 597,270 Weighted average number of Common Units outstanding 355,351 348,760 351,840 348,595 Other potential dilutive units 3,630 3,390 3,565 3,418 Weighted average number of Common Units and potential dilutive securities 358,981 352,150 355,405 352,013 The following table summarizes the potentially dilutive shares or units 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 September 30, Nine Months Ended September 30, 2016 2015 2016 2015 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 170 997 170 997 Outstanding participating securities — — — —

Segment Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2016
Segment Reporting [Abstract]
Segment Reporting	Segment Reporting Reportable Segments We had three reportable operating segments at September 30, 2016 , the first two of which consist of the ownership and rental of (i) industrial and (ii) medical office real estate investments. Beginning in 2016, our office properties are no longer presented as a separate reportable segment, as they no longer meet the quantitative thresholds for separate presentation, and are referred to as part of our non-reportable Rental Operations. The operations of our industrial and medical office properties as well as our non-reportable Rental Operations, are collectively referred to as "Rental Operations." Our third 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 (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Revenues Rental Operations: Industrial $ 149,746 $ 136,276 $ 432,945 $ 419,391 Medical Office 45,353 39,911 130,713 120,213 Non-reportable Rental Operations 10,065 23,277 38,490 72,103 Service Operations 19,351 33,599 68,546 110,320 Total segment revenues 224,515 233,063 670,694 722,027 Other revenue 1,684 1,474 7,023 5,842 Consolidated revenue from continuing operations 226,199 234,537 677,717 727,869 Discontinued operations 380 7 735 32,171 Consolidated revenue $ 226,579 $ 234,544 $ 678,452 $ 760,040 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 (in thousands and excluding discontinued operations): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 PNOI Industrial $ 109,350 $ 96,966 $ 314,349 $ 285,087 Medical Office 29,401 25,827 84,822 76,878 Non-reportable Rental Operations 4,083 4,636 12,273 14,100 PNOI, excluding all sold/held-for-sale properties 142,834 127,429 411,444 376,065 PNOI from sold/held-for-sale properties included in continuing operations 1,840 12,136 16,512 46,635 PNOI, continuing operations $ 144,674 $ 139,565 $ 427,956 $ 422,700 Earnings from Service Operations 2,169 3,905 8,216 11,865 Rental Operations revenues and expenses excluded from PNOI: Straight-line rental income and expense, net 5,008 5,723 10,832 16,830 Revenues related to lease buyouts 1,491 408 1,725 1,366 Amortization of lease concessions and above and below market rents (303 ) (357 ) (1,361 ) (2,559 ) Intercompany rents and other adjusting items (27 ) (434 ) (246 ) (1,306 ) Non-Segment Items: Equity in earnings (loss) of unconsolidated companies 12,010 (5,088 ) 37,404 16,281 Gain on dissolution of unconsolidated company — — 30,697 — Promote income 2,212 — 26,299 — Interest expense (34,606 ) (41,615 ) (109,520 ) (134,576 ) Depreciation and amortization expense (80,688 ) (79,898 ) (238,647 ) (240,135 ) Gain on sale of properties 82,698 71,259 137,589 202,153 Impairment charges on non-depreciable properties (3,042 ) (2,426 ) (15,098 ) (7,896 ) Interest and other income, net 507 1,343 3,597 3,056 General and administrative expenses (12,534 ) (11,340 ) (42,216 ) (47,582 ) Gain on land sales 1,601 1,659 2,438 24,096 Other operating expenses (1,424 ) (1,467 ) (3,496 ) (4,579 ) (Loss) gain on extinguishment of debt (6,243 ) 64 (8,673 ) (82,589 ) Acquisition-related activity (7 ) (5,660 ) (82 ) (6,993 ) Other non-segment revenues and expenses, net (1,392 ) (1,806 ) (1,715 ) (2,065 ) Income from continuing operations before income taxes $ 112,104 $ 73,835 $ 265,699 $ 168,067 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 were as follows (in thousands): September 30, December 31, Assets Rental Operations: Industrial $ 4,712,532 $ 4,552,107 Medical Office 1,319,955 1,269,546 Non-reportable Rental Operations 214,130 367,469 Service Operations 129,775 137,257 Total segment assets 6,376,392 6,326,379 Non-segment assets 485,689 569,136 Consolidated assets $ 6,862,081 $ 6,895,515

Discontinued Operations and Ass

Discontinued Operations and Assets Held for Sale	9 Months Ended
	Sep. 30, 2016
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations and Assets Held for Sale	Discontinued Operations, Assets Held-for-Sale and Impairments Discontinued Operations The following table illustrates the number of sold or held-for-sale properties included in, or excluded from, discontinued operations: Held-for-Sale at September 30, 2016 Sold Year-to-Date in 2016 Sold in 2015 Total Industrial 0 0 5 5 Medical Office 0 0 1 1 Non-reportable Rental Operations 0 0 56 56 Total properties included in discontinued operations 0 0 62 62 Properties excluded from discontinued operations 1 22 91 114 Total properties sold or classified as held-for-sale 1 22 153 176 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. There were no additional properties classified as discontinued operations during the nine months ended September 30, 2016 and, as such, no interest expense was allocated to discontinued operations during that period. The following table illustrates the operational results of the buildings reflected in discontinued operations (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Revenues $ 380 $ 7 $ 735 $ 32,171 Operating expenses (3 ) (50 ) 6 (12,449 ) Depreciation and amortization — — — (3,517 ) Operating income 377 (43 ) 741 16,205 Interest expense — — — (5,659 ) Income before gain on sales 377 (43 ) 741 10,546 Gain on sale of depreciable properties 319 66 485 417,795 Income from discontinued operations before income taxes 696 23 1,226 428,341 Income tax expense — 45 — (3,175 ) Income from discontinued operations $ 696 $ 68 $ 1,226 $ 425,166 We had no capital expenditures for the nine months ended September 30, 2016 and $7.4 million for the nine months ended September 30, 2015 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 (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Income from continuing operations attributable to common shareholders $ 111,325 $ 76,367 $ 263,174 $ 170,294 Income from discontinued operations attributable to common shareholders 689 67 1,214 420,764 Net income attributable to common shareholders $ 112,014 $ 76,434 $ 264,388 $ 591,058 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 September 30, 2016 , one in-service property and 14 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 (in thousands): Held-for-Sale Properties Included in Continuing Operations September 30, 2016 December 31, 2015 Land and improvements $ 5,142 $ 9,797 Buildings and tenant improvements 6,032 39,480 Undeveloped land 9,939 — Accumulated depreciation (3,763 ) (7,183 ) Deferred leasing and other costs, net 419 3,293 Other assets 415 414 Total assets held-for-sale $ 18,184 $ 45,801 Accrued expenses $ 150 $ 322 Other liabilities 88 650 Total liabilities held-for-sale $ 238 $ 972 Impairment Charges The following table illustrates impairment charges recognized (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Impairment charges - land $ — $ 2,426 $ 12,056 $ 7,032 Impairment charges - building 3,042 — 3,042 864 Impairment charges $ 3,042 $ 2,426 $ 15,098 $ 7,896 As the result of changes in our intended use or plans for sale of certain of our undeveloped land holdings, we recognized land impairment charges of $12.1 million for the nine months ended September 30, 2016 . The various land holdings written down to fair value totaled 174 acres. The fair value of the land upon which we recognized impairment charges was estimated based on asset-specific offers to purchase and comparable transactions. Our valuation estimates primarily relied upon level 3 inputs.

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2016
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 October 19, 2016 : Class of stock/units Quarterly Amount per Share or Unit Record Date Payment Date Common - Quarterly $0.19 November 16, 2016 November 30, 2016 Debt Extinguishment On October 20, 2016, we redeemed $129.5 million in unsecured notes that had a scheduled maturity in August of 2019. We will recognize a net loss on the extinguishment of these notes in the fourth quarter totaling $25.2 million , which is comprised of a make-whole payment to the bondholders as well as the write-off of unamortized deferred financing costs.

Acquisitions and Dispositions (

Acquisitions and Dispositions (Tables)	9 Months Ended
	Sep. 30, 2016
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	The following table summarizes amounts recognized for each major class of asset and liability (in thousands) for these acquisitions during the nine months ended September 30, 2016 : Real estate assets $ 72,824 Lease related intangible assets 6,427 Fair value of acquired net assets $ 79,251
Summary of Most Significant Assumptions Utilized in the Estimations [Table Text Block]	The 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 nine months ended September 30, 2016 are as follows: Low High Discount rate 7.46% 8.10% Exit capitalization rate 6.46% 6.96% Lease-up period (months) 12 12 Net rental rate per square foot - Industrial $3.39 $3.39 Net rental rate per square foot - Medical Office $15.40 $15.40
Duke/Hulfish LLC [Member]
Schedule of Business Acquisitions, by Acquisition [Table Text Block]	The computation of this gain is shown as follows (in thousands): Fair value of one property received in non-cash distribution $ 63,000 Cash received at dissolution 2,760 Carrying value of investment in properties distributed to partners (35,063 ) Gain on dissolution of unconsolidated company $ 30,697

Indebtedness (Tables)

Indebtedness (Tables)	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Fair Value, Liabilities Measured on a Recurring Basis, Disclosure Only	The following table summarizes the book value and changes in the fair value of our debt (in thousands): Book Value at 12/31/2015 Book Value at 9/30/2016 Fair Value at 12/31/2015 Issuances and Assumptions Payments/Payoffs Adjustments to Fair Value Fair Value at 9/30/2016 Fixed rate secured debt $ 736,896 $ 384,025 $ 789,095 $ — $ (352,382 ) $ (11,765 ) $ 424,948 Variable rate secured debt 3,100 2,800 3,100 — (300 ) — 2,800 Unsecured debt 2,530,743 2,628,980 2,624,795 375,000 (276,764 ) 93,015 2,816,046 Unsecured line of credit 71,000 — 70,852 — (71,000 ) 148 — Total $ 3,341,739 $ 3,015,805 $ 3,487,842 $ 375,000 $ (700,446 ) $ 81,398 $ 3,243,794 Less: Deferred financing costs 21,598 24,754 Total indebtedness as reported on the consolidated balance sheets $ 3,320,141 $ 2,991,051
Unsecured Line of Credit	Our unsecured line of credit at September 30, 2016 is described as follows (in thousands): Description Maximum Capacity Maturity Date Outstanding Balance at September 30, 2016 Unsecured Line of Credit - Partnership $ 1,200,000 January 2019 $ —

Related Party Transactions (Tab

Related Party Transactions (Tables)	9 Months Ended
	Sep. 30, 2016
Related Party Transactions [Abstract]
Schedule of Fees Earned from Related Parties	The following table summarizes the fees earned from these companies, prior to the elimination of our ownership percentage (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2016 2015 2016 2015 Management fees $ 1,035 $ 1,835 $ 3,585 $ 5,388 Leasing fees 629 692 2,061 1,714 Construction and development fees 1,307 2,247 6,666 3,377

Net Income (Loss) Per Common 23

Net Income (Loss) Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Reconciling the Components of Basic and Diluted Net Income (Loss) per Common Share	The following table reconciles the components of basic and diluted net income per common share or Common Unit (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 General Partner Net income attributable to common shareholders $ 112,014 $ 76,434 $ 264,388 $ 591,058 Less: Dividends on participating securities (580 ) (593 ) (1,751 ) (1,803 ) Basic net income attributable to common shareholders 111,434 75,841 262,637 589,255 Add back dividends on dilutive participating securities 580 593 1,751 1,803 Noncontrolling interest in earnings of common unitholders 1,131 751 2,670 6,212 Diluted net income attributable to common shareholders $ 113,145 $ 77,185 $ 267,058 $ 597,270 Weighted average number of common shares outstanding 351,856 345,256 348,341 344,986 Weighted average Limited Partner Units outstanding 3,495 3,504 3,499 3,609 Other potential dilutive shares 3,630 3,390 3,565 3,418 Weighted average number of common shares and potential dilutive securities 358,981 352,150 355,405 352,013 Partnership Net income attributable to common unitholders $ 113,145 $ 77,185 $ 267,058 $ 597,270 Less: Distributions on participating securities (580 ) (593 ) (1,751 ) (1,803 ) Basic net income attributable to common unitholders $ 112,565 $ 76,592 $ 265,307 $ 595,467 Add back distributions on dilutive participating securities 580 593 1,751 1,803 Diluted net income attributable to common unitholders $ 113,145 $ 77,185 $ 267,058 $ 597,270 Weighted average number of Common Units outstanding 355,351 348,760 351,840 348,595 Other potential dilutive units 3,630 3,390 3,565 3,418 Weighted average number of Common Units and potential dilutive securities 358,981 352,150 355,405 352,013
Computation of Anti-Dilutive Common Share	The following table summarizes the potentially dilutive shares or units 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 September 30, Nine Months Ended September 30, 2016 2015 2016 2015 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 170 997 170 997 Outstanding participating securities — — — —

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2016
Segment Reporting [Abstract]
Reconciliation of Revenue from Segments to Consolidated	The following table shows the revenues for each of the reportable segments, as well as a reconciliation to consolidated revenues (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Revenues Rental Operations: Industrial $ 149,746 $ 136,276 $ 432,945 $ 419,391 Medical Office 45,353 39,911 130,713 120,213 Non-reportable Rental Operations 10,065 23,277 38,490 72,103 Service Operations 19,351 33,599 68,546 110,320 Total segment revenues 224,515 233,063 670,694 722,027 Other revenue 1,684 1,474 7,023 5,842 Consolidated revenue from continuing operations 226,199 234,537 677,717 727,869 Discontinued operations 380 7 735 32,171 Consolidated revenue $ 226,579 $ 234,544 $ 678,452 $ 760,040
Summary of Net Operation Income	The following table shows a reconciliation of our segment-level measures of profitability to consolidated income from continuing operations before income taxes (in thousands and excluding discontinued operations): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 PNOI Industrial $ 109,350 $ 96,966 $ 314,349 $ 285,087 Medical Office 29,401 25,827 84,822 76,878 Non-reportable Rental Operations 4,083 4,636 12,273 14,100 PNOI, excluding all sold/held-for-sale properties 142,834 127,429 411,444 376,065 PNOI from sold/held-for-sale properties included in continuing operations 1,840 12,136 16,512 46,635 PNOI, continuing operations $ 144,674 $ 139,565 $ 427,956 $ 422,700 Earnings from Service Operations 2,169 3,905 8,216 11,865 Rental Operations revenues and expenses excluded from PNOI: Straight-line rental income and expense, net 5,008 5,723 10,832 16,830 Revenues related to lease buyouts 1,491 408 1,725 1,366 Amortization of lease concessions and above and below market rents (303 ) (357 ) (1,361 ) (2,559 ) Intercompany rents and other adjusting items (27 ) (434 ) (246 ) (1,306 ) Non-Segment Items: Equity in earnings (loss) of unconsolidated companies 12,010 (5,088 ) 37,404 16,281 Gain on dissolution of unconsolidated company — — 30,697 — Promote income 2,212 — 26,299 — Interest expense (34,606 ) (41,615 ) (109,520 ) (134,576 ) Depreciation and amortization expense (80,688 ) (79,898 ) (238,647 ) (240,135 ) Gain on sale of properties 82,698 71,259 137,589 202,153 Impairment charges on non-depreciable properties (3,042 ) (2,426 ) (15,098 ) (7,896 ) Interest and other income, net 507 1,343 3,597 3,056 General and administrative expenses (12,534 ) (11,340 ) (42,216 ) (47,582 ) Gain on land sales 1,601 1,659 2,438 24,096 Other operating expenses (1,424 ) (1,467 ) (3,496 ) (4,579 ) (Loss) gain on extinguishment of debt (6,243 ) 64 (8,673 ) (82,589 ) Acquisition-related activity (7 ) (5,660 ) (82 ) (6,993 ) Other non-segment revenues and expenses, net (1,392 ) (1,806 ) (1,715 ) (2,065 ) Income from continuing operations before income taxes $ 112,104 $ 73,835 $ 265,699 $ 168,067
Reportable Segments Consolidated Assets	The assets for each of the reportable segments were as follows (in thousands): September 30, December 31, Assets Rental Operations: Industrial $ 4,712,532 $ 4,552,107 Medical Office 1,319,955 1,269,546 Non-reportable Rental Operations 214,130 367,469 Service Operations 129,775 137,257 Total segment assets 6,376,392 6,326,379 Non-segment assets 485,689 569,136 Consolidated assets $ 6,862,081 $ 6,895,515

Discontinued Operations and A25

Discontinued Operations and Assets Held for Sale (Tables)	9 Months Ended
	Sep. 30, 2016
Discontinued Operations and Disposal Groups [Abstract]
Table Illustration of Number of Properties in Discontinued Operations	The following table illustrates the number of sold or held-for-sale properties included in, or excluded from, discontinued operations: Held-for-Sale at September 30, 2016 Sold Year-to-Date in 2016 Sold in 2015 Total Industrial 0 0 5 5 Medical Office 0 0 1 1 Non-reportable Rental Operations 0 0 56 56 Total properties included in discontinued operations 0 0 62 62 Properties excluded from discontinued operations 1 22 91 114 Total properties sold or classified as held-for-sale 1 22 153 176
Table Illustration of Discontinued Operations in Statement of Operations	The following table illustrates the operational results of the buildings reflected in discontinued operations (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Revenues $ 380 $ 7 $ 735 $ 32,171 Operating expenses (3 ) (50 ) 6 (12,449 ) Depreciation and amortization — — — (3,517 ) Operating income 377 (43 ) 741 16,205 Interest expense — — — (5,659 ) Income before gain on sales 377 (43 ) 741 10,546 Gain on sale of depreciable properties 319 66 485 417,795 Income from discontinued operations before income taxes 696 23 1,226 428,341 Income tax expense — 45 — (3,175 ) Income from discontinued operations $ 696 $ 68 $ 1,226 $ 425,166
Allocation of Common Shareholders' Income (Loss) Between Continuing and Discontinued Operations	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 (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Income from continuing operations attributable to common shareholders $ 111,325 $ 76,367 $ 263,174 $ 170,294 Income from discontinued operations attributable to common shareholders 689 67 1,214 420,764 Net income attributable to common shareholders $ 112,014 $ 76,434 $ 264,388 $ 591,058
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 (in thousands): Held-for-Sale Properties Included in Continuing Operations September 30, 2016 December 31, 2015 Land and improvements $ 5,142 $ 9,797 Buildings and tenant improvements 6,032 39,480 Undeveloped land 9,939 — Accumulated depreciation (3,763 ) (7,183 ) Deferred leasing and other costs, net 419 3,293 Other assets 415 414 Total assets held-for-sale $ 18,184 $ 45,801 Accrued expenses $ 150 $ 322 Other liabilities 88 650 Total liabilities held-for-sale $ 238 $ 972
Asset Impairment Charges [Text Block]	The following table illustrates impairment charges recognized (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Impairment charges - land $ — $ 2,426 $ 12,056 $ 7,032 Impairment charges - building 3,042 — 3,042 864 Impairment charges $ 3,042 $ 2,426 $ 15,098 $ 7,896

Subsequent Events (Tables)

Subsequent Events (Tables)	9 Months Ended
	Sep. 30, 2016
Subsequent Events [Abstract]
Schedule of Dividends Declared	The General Partner's board of directors declared the following dividends/distributions at its regularly scheduled board meeting held on October 19, 2016 : Class of stock/units Quarterly Amount per Share or Unit Record Date Payment Date Common - Quarterly $0.19 November 16, 2016 November 30, 2016

General Basis of Presentation27

General Basis of Presentation (Details)	9 Months Ended
	Sep. 30, 2016
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	Sep. 30, 2016USD ($)
Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]
Maximum Guarantee Exposure for Joint Venture Loans	$ 52.7

Acquisitions and Dispositions29

Acquisitions and Dispositions (Narrative) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2016USD ($)buildings	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)buildings	Sep. 30, 2015USD ($)
Number Of Real Estate Properties Acquired | buildings	2		2
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			8 years 10 months 24 days
Operating Leases, Income Statement, Lease Revenue	$ 206,848,000	$ 200,938,000	$ 609,171,000	$ 617,549,000
Operating Income (Loss)	152,453,000	119,703,000	380,377,000	389,169,000
Property, Plant, and Equipment, Fair Value Disclosure	72,824,000		72,824,000
Gain on dissolution of unconsolidated company	0	0	30,697,000	0
Promote income	$ 2,212,000	$ 0	$ 26,299,000	$ 0
Duke Realty Limited Partnership [Member]
Number Of Real Estate Properties Acquired | buildings	1		1
Property, Plant, and Equipment, Fair Value Disclosure	$ 63,000,000		$ 63,000,000
Proceeds from Equity Method Investment, Dividends or Distributions			2,760,000
Equity Method Investments	$ (35,063,000)		(35,063,000)
Gain on dissolution of unconsolidated company			30,697,000
Other 2016 Acquisitions [Member]
Operating Leases, Income Statement, Lease Revenue			2,100,000
Operating Income (Loss)			$ (28,000)
Gramercy Property Trust [Member]
Number of Real Estate Properties | buildings	7		7
Duke/Hulfish LLC [Member]
Number of Real Estate Properties | buildings	8		8
Duke/Hulfish LLC [Member]
Equity Method Investment, Ownership Percentage	20.00%		20.00%

Acquisitions and Dispositions30

Acquisitions and Dispositions (Summary of Allocation of Fair Value of Amounts Recognized) (Details) $ in Thousands	Sep. 30, 2016USD ($)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Buildings	$ 72,824
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	6,427
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	$ 79,251

Acquisitions and Dispositions31

Acquisitions and Dispositions (Summary of Significant Assumptions Utilized in Estimates) (Details)	9 Months Ended
	Sep. 30, 2016$ / sqftmonths
Minimum [Member]
Business Acquisition [Line Items]
Fair Value Inputs, Discount Rate	7.46%
Fair Value Inputs, Cap Rate	6.46%
Fair Value Measurement With Unobservable Inputs Lease up Period in Months | months	12
Maximum [Member]
Business Acquisition [Line Items]
Fair Value Inputs, Discount Rate	8.10%
Fair Value Inputs, Cap Rate	6.96%
Fair Value Measurement With Unobservable Inputs Lease up Period in Months | months	12
Industrial [Member] | Minimum [Member]
Business Acquisition [Line Items]
Fair Value Measurement With Unobservable Inputs Rental Rate Per Square Foot	3.39
Industrial [Member] | Maximum [Member]
Business Acquisition [Line Items]
Fair Value Measurement With Unobservable Inputs Rental Rate Per Square Foot	3.39
Medical Office [Member] | Minimum [Member]
Business Acquisition [Line Items]
Fair Value Measurement With Unobservable Inputs Rental Rate Per Square Foot	15.40
Medical Office [Member] | Maximum [Member]
Business Acquisition [Line Items]
Fair Value Measurement With Unobservable Inputs Rental Rate Per Square Foot	15.40

Acquisitions and Dispositions D

Acquisitions and Dispositions Dispositions (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Dispositions Disclosures [Line Items]
Proceeds from Sale of Real Estate Held-for-investment	$ 369,118	$ 1,534,177

Indebtedness (Summary of Book V

Indebtedness (Summary of Book Value and Changes in Fair Value of Debt) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Book value	$ 2,991,051	$ 3,320,141
Fair value	3,243,794	3,487,842
Issuances and Assumptions	375,000
Payments/Payoffs	(700,446)
Adjustments to fair value	81,398
Long-term Debt, Gross	3,015,805	3,341,739
Deferred Finance Costs, Net	(24,754)	(21,598)
Fixed Rate Secured Debt [Member]
Book value	384,025	736,896
Fair value	424,948	789,095
Issuances and Assumptions	0
Payments/Payoffs	(352,382)
Adjustments to fair value	(11,765)
Variable Rate Secured Debt [Member]
Book value	2,800	3,100
Fair value	2,800	3,100
Issuances and Assumptions	0
Payments/Payoffs	(300)
Adjustments to fair value	0
Unsecured Debt [Member]
Book value	2,628,980	2,530,743
Fair value	2,816,046	2,624,795
Issuances and Assumptions	375,000
Payments/Payoffs	(276,764)
Adjustments to fair value	93,015
Unsecured Line of Credit DRLP [Member]
Book value	0	71,000
Fair value	0	$ 70,852
Issuances and Assumptions	0
Payments/Payoffs	(71,000)
Adjustments to fair value	$ 148

Indebtedness Secured Debt (Deta

Indebtedness Secured Debt (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)loans	Sep. 30, 2015USD ($)
Debt Instrument [Line Items]
Repayments of Secured Debt	$ 352,723	$ 221,085
Debt Instrument, Interest Rate, Stated Percentage	3.25%
Fixed Rate Secured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage Rate Range, Minimum	2.50%
Debt Instrument, Interest Rate, Effective Percentage Rate Range, Maximum	3.30%
Repayments of Secured Debt	$ 346,400
number of secured loans repaid | loans	5
Debt Instrument, Interest Rate, Stated Percentage	5.90%

Indebtedness Unsecured Debt (De

Indebtedness Unsecured Debt (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)loans	Sep. 30, 2015USD ($)	Dec. 31, 2015USD ($)
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	5.95%		5.95%
Repayments of Unsecured Debt			$ 285,339	$ 759,948
Gains (Losses) on Extinguishment of Debt	$ (6,243)	$ 64	$ (8,673)	(82,589)
Number of Variable Rate Unsecured Loans | loans			1
Proceeds from Issuance of Unsecured Debt			$ 375,000	$ 0
Long-term Debt	$ 2,991,051		$ 2,991,051		$ 3,320,141
Debt Instrument, Interest Rate, Effective Percentage	3.36%		3.36%
Debt Instrument, Repurchased Face Amount	$ 203,000		$ 203,000
Debt Instrument, Interest Rate, Stated Percentage	3.25%		3.25%
Variable Rate UnSecured Debt [Member] [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 250,000		$ 250,000
Debt Instrument, Interest Rate, Effective Percentage	1.68%		1.68%
Fixed Rate Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Estimated Trading Values, Percent of Face Value, Minimum			103.00%
Debt Instrument, Estimated Trading Values, Percent of Face Value, Maximum			137.00%
Debt Instrument, Covenant Compliance			We were in compliance with all such covenants at September 30, 2016
Unsecured Debt [Member]
Debt Instrument [Line Items]
Repayments of Unsecured Debt			$ 209,000
Proceeds from Issuance of Unsecured Debt			375,000
Long-term Debt	$ 2,628,980		2,628,980		$ 2,530,743
Tender Offer [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount	$ 72,000		72,000
Tender Offer [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Repayments of Unsecured Debt			$ 74,500

Indebtedness (Unsecured Line of

Indebtedness (Unsecured Line of Credit) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Line of credit balance	$ 0	$ 71,000
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%
Extended Maturity [Member] | Unsecured Line of Credit DRLP [Member] | Unsecured Line of Credit DRLP [Member]
Maturity date	Jan. 1, 2020

Shareholders' Equity Sharehol37

Shareholders' Equity Shareholders' Equity (Details) - USD ($) $ in Thousands, shares in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Class of Stock [Line Items]
Proceeds from Issuance of Common Stock	$ 217,513	$ 4,592
At-the-market equity issuance [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, New Issues	8.3
Proceeds from Issuance of Common Stock	$ 213,600
Gross Proceeds [Member] | At-the-market equity issuance [Member]
Class of Stock [Line Items]
Proceeds from Issuance of Common Stock	$ 216,200

Related Party Transactions (Sch

Related Party Transactions (Schedule of Fees Earned from Related Parties) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Management Fees [Member]
Revenue from related party transactions	$ 1,035	$ 1,835	$ 3,585	$ 5,388
Leasing Fees [Member]
Revenue from related party transactions	629	692	2,061	1,714
Construction and Development Fees [Member]
Revenue from related party transactions	$ 1,307	$ 2,247	$ 6,666	$ 3,377

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		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income attributable to common shareholders	$ 112,014	$ 76,434	$ 264,388	$ 591,058
Less: Dividends on participating securities	(580)	(593)	(1,751)	(1,803)
Basic net income attributable to common shareholders	111,434	75,841	262,637	589,255
Participating Securities, Distributed and Undistributed Earnings (Loss), Diluted	580	593	1,751	1,803
Noncontrolling Interest in Net Income (Loss) Operating Partnerships, Redeemable	1,131	751	2,670	6,212
Diluted net income attributable to common shareholders	$ 113,145	$ 77,185	$ 267,058	$ 597,270
Weighted average number of common shares/units outstanding, Basic	351,856	345,256	348,341	344,986
Weighted Average Limited Partnership Units Outstanding, Basic	3,495	3,504	3,499	3,609
Other potential dilutive shares/units	3,630	3,390	3,565	3,418
Weighted average number of common shares/units and potential dilutive securities	358,981	352,150	355,405	352,013
Duke Realty Limited Partnership [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income attributable to common shareholders	$ 113,145	$ 77,185	$ 267,058	$ 597,270
Less: Dividends on participating securities	(580)	(593)	(1,751)	(1,803)
Basic net income attributable to common unitholders	112,565	76,592	265,307	595,467
Participating Securities, Distributed and Undistributed Earnings (Loss), Diluted	580	593	1,751	1,803
Diluted Net Income Loss Attributable To Common Unitholders	$ 113,145	$ 77,185	$ 267,058	$ 597,270
Weighted average number of common shares/units outstanding, Basic	355,351	348,760	351,840	348,595
Other potential dilutive shares/units	3,630	3,390	3,565	3,418
Weighted average number of common shares/units and potential dilutive securities	358,981	352,150	355,405	352,013

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		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities	170	997	170	997
Participating Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities	0	0	0	0

Segment Reporting Summary of Re

Segment Reporting Summary of Revenues (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)
Segment Reporting, Revenue Reconciling Item [Line Items]
Number of Reportable Segments			3
Rental and related revenue	$ 206,848	$ 200,938	$ 609,171	$ 617,549
General contractor and service fee revenue	19,351	33,599	68,546	110,320
Revenues	226,199	234,537	677,717	727,869
Disposal Group, Including Discontinued Operation, Revenue	380	7	735	32,171
Total Revenues Including Revenues Related To Discontinued Operations	226,579	234,544	678,452	760,040
Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	224,515	233,063	670,694	722,027
Operating Segments [Member] | Industrial [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Rental and related revenue	149,746	136,276	432,945	419,391
Operating Segments [Member] | Medical Office [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Rental and related revenue	45,353	39,911	130,713	120,213
Operating Segments [Member] | All Other Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Rental and related revenue	10,065	23,277	38,490	72,103
Operating Segments [Member] | Service Operations [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
General contractor and service fee revenue	19,351	33,599	68,546	110,320
Corporate, Non-Segment [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Rental and related revenue	1,684	1,474	7,023	5,842
Disposal Group, Including Discontinued Operation, Revenue	$ 380	$ 7	$ 735	$ 32,171

Segment Reporting (Summary of N

Segment Reporting (Summary of Net Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Straight line rental income and expenses, net			$ 10,832	$ 18,498
Income from Equity Method Investments	$ 12,010	$ (5,088)	37,404	16,281
Gain on dissolution of unconsolidated company	0	0	30,697	0
Promote income	2,212	0	26,299	0
Interest expense	(34,606)	(41,615)	(109,520)	(134,576)
Depreciation and amortization on continuing operations	(80,688)	(79,898)	(238,647)	(240,135)
Gain on sale of properties	82,698	71,259	137,589	202,153
Impairment Charges	(3,042)	(2,426)	(15,098)	(7,896)
Interest and other income, net	507	1,343	3,597	3,056
General and administrative expenses	(12,534)	(11,340)	(42,216)	(47,582)
Gain on land sales	1,601	1,659	2,438	24,096
Other operating expenses	(1,424)	(1,467)	(3,496)	(4,579)
Gains (Losses) on Extinguishment of Debt	(6,243)	64	(8,673)	(82,589)
Acquisition-related activity	(7)	(5,660)	(82)	(6,993)
Income from continuing operations before income taxes	112,104	73,835	265,699	168,067
Operating Segments [Member]
Property Level Net Operating Income – Cash Basis	142,834	127,429	411,444	376,065
Property Level Net Income, Cash Basis, Continuing Operations	144,674	139,565	427,956	422,700
Operating Segments [Member] | Industrial [Member]
Property Level Net Operating Income – Cash Basis	109,350	96,966	314,349	285,087
Operating Segments [Member] | Medical Office [Member]
Property Level Net Operating Income – Cash Basis	29,401	25,827	84,822	76,878
Operating Segments [Member] | All Other Segments [Member]
Property Level Net Operating Income – Cash Basis	4,083	4,636	12,273	14,100
Operating Segments [Member] | Service Operations [Member]
Service Operations Net Income (loss)	2,169	3,905	8,216	11,865
Segment Reconciling Items [Member]
Sold Properties Included in Continuing Operations Net Operating Income	1,840	12,136	16,512	46,635
Straight line rental income and expenses, net	5,008	5,723	10,832	16,830
Revenues Related to Lease Buyouts	1,491	408	1,725	1,366
Amortization of lease incentives and market rents	(303)	(357)	(1,361)	(2,559)
Intercompany rents and other adjusting items	(27)	(434)	(246)	(1,306)
Corporate, Non-Segment [Member]
Income from Equity Method Investments	12,010	(5,088)	37,404	16,281
Gain on dissolution of unconsolidated company	0	0	30,697	0
Promote income	2,212	0	26,299	0
Interest expense	(34,606)	(41,615)	(109,520)	(134,576)
Depreciation and amortization on continuing operations	(80,688)	(79,898)	(238,647)	(240,135)
Gain on sale of properties	82,698	71,259	137,589	202,153
Impairment Charges	(3,042)	(2,426)	(15,098)	(7,896)
Interest and other income, net	507	1,343	3,597	3,056
General and administrative expenses	(12,534)	(11,340)	(42,216)	(47,582)
Gain on land sales	1,601	1,659	2,438	24,096
Other operating expenses	(1,424)	(1,467)	(3,496)	(4,579)
Gains (Losses) on Extinguishment of Debt	(6,243)	64	(8,673)	(82,589)
Acquisition-related activity	(7)	(5,660)	(82)	(6,993)
Other non-segment income	$ (1,392)	$ (1,806)	$ (1,715)	$ (2,065)

Segment Reporting (Reportable S

Segment Reporting (Reportable Segments Consolidated Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Total Assets	$ 6,862,081	$ 6,895,515
Corporate, Non-Segment [Member]
Total Assets	485,689	569,136
Operating Segments [Member]
Total Assets	6,376,392	6,326,379
Operating Segments [Member] | Industrial [Member]
Total Assets	4,712,532	4,552,107
Operating Segments [Member] | Medical Office [Member]
Total Assets	1,319,955	1,269,546
Operating Segments [Member] | All Other Segments [Member]
Total Assets	214,130	367,469
Operating Segments [Member] | Service Operations [Member]
Total Assets	$ 129,775	$ 137,257

Discontinued Operations and A44

Discontinued Operations and Assets Held for Sale (Table Illustration of Number of Properties in Discontinued Operations) (Details) - buildings	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Number of properties held for sale in discontinued operations	0
Number of properties sold in discontinued operations	0	62
Total number of properties in discontinued operations	62
Continuing Operations, Number of In-service Properties Held for Sale	1
Continuing Operations, Number of Real Estate Properties Sold	22	91
Continuing Operations, Number of Real Estate Properties Sold or Classified as Held for Sale	114
Number of Real Estate Properties Held for Sale	1
Number of Real Estate Properties Sold	22	153
Total Properties Sold or Classified as Held for Sale	176
Industrial [Member]
Number of properties held for sale in discontinued operations	0
Number of properties sold in discontinued operations	0	5
Total number of properties in discontinued operations	5
Medical Office [Member]
Number of properties held for sale in discontinued operations	0
Number of properties sold in discontinued operations	0	1
Total number of properties in discontinued operations	1
Non-reportable segment properties
Number of properties held for sale in discontinued operations	0
Number of properties sold in discontinued operations	0	56
Total number of properties in discontinued operations	56

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		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Discontinued Operations
Revenues	$ 380	$ 7	$ 735	$ 32,171
Operating Expenses	(3)	(50)	6	(12,449)
Depreciation and amortization, discontinued operations	0	0	0	(3,517)
Operating Income (Loss)	377	(43)	741	16,205
Interest Expense	0	0	0	(5,659)
Income (loss) before gain on sales	377	(43)	741	10,546
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	319	66	485	417,795
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	696	23	1,226	428,341
Discontinued Operation, Tax Effect of Discontinued Operation	0	45	0	(3,175)
Income from discontinued operations	$ 696	$ 68	1,226	425,166
Payments For Second Generation Tenant Improvements Leasing Costs And Building Improvements			$ 39,169	45,688
Discontinued Operations [Member]
Discontinued Operations
Payments For Second Generation Tenant Improvements Leasing Costs And Building Improvements				$ 7,400

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		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Discontinued Operations
Income (loss) from continuing operations attributable to common shareholders	$ 111,325	$ 76,367	$ 263,174	$ 170,294
Income (loss) from discontinued operations attributable to common shareholders	689	67	1,214	420,764
Net income attributable to common shareholders	$ 112,014	$ 76,434	$ 264,388	$ 591,058

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	9 Months Ended
	Sep. 30, 2016USD ($)abuildings	Dec. 31, 2015USD ($)
Held for Sale Assets in Continuing and Discontinued Operations
Total assets held-for-sale	$ 18,184	$ 45,801
Total liabilities held-for-sale	$ 238	972
Continuing Operations, Number of In-service Properties Held for Sale | buildings	1
Area of Land | a	14
Continuing Operations [Member]
Held for Sale Assets in Continuing and Discontinued Operations
Land and Land Improvements Held-for-Sale	$ 5,142	9,797
Buildings and Tenant Improvements Held-for-Sale	6,032	39,480
Inventory, Land Held-for-sale	9,939	0
Accumulated Depreciation of Assets Held-for-Sale	(3,763)	(7,183)
Lease Related Assets, Held for Sale	419	3,293
Other assets	415	414
Total assets held-for-sale	18,184	45,801
Accrued expenses	150	322
Other liabilities	88	650
Total liabilities held-for-sale	$ 238	$ 972

Discontinued Operations and A48

Discontinued Operations and Assets Held for Sale Impairment (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016USD ($)a	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)a	Sep. 30, 2015USD ($)
Acres of Land with Impairment Charge | a	174		174
Impairment Charges	$ 3,042	$ 2,426	$ 15,098	$ 7,896
Land [Member]
Impairment Charges	0	2,426	12,056	7,032
buildings [Member]
Impairment Charges	$ 3,042	$ 0	$ 3,042	$ 864

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			9 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Subsequent Event [Line Items]
Repayments of Unsecured Debt				$ 285,339	$ 759,948
Gains (Losses) on Extinguishment of Debt		$ (6,243)	$ 64	$ (8,673)	$ (82,589)
Subsequent Event [Member]
Subsequent Event [Line Items]
Repayments of Unsecured Debt	$ 129,500
Gains (Losses) on Extinguishment of Debt	$ 25,200
Subsequent Event [Member] | Common Stock [Member]
Subsequent Event [Line Items]
Common stock dividends declared per share	$ 0.19
Record date	Nov. 16, 2016
Payment date	Nov. 30, 2016