10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark One)

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2016

OR

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from              to     

Commission File Number: 1-9044 (Duke Realty Corporation) 0-20625 (Duke Realty Limited Partnership)

DUKE REALTY CORPORATION

DUKE REALTY LIMITED PARTNERSHIP

(Exact Name of Registrant as Specified in Its Charter)

Indiana (Duke Realty Corporation)	35-1740409 (Duke Realty Corporation)
Indiana (Duke Realty Limited Partnership)	35-1898425 (Duke Realty Limited Partnership)
(State or Other Jurisdiction of Incorporation or Organization)	(I.R.S. Employer Identification Number)
600 East 96thStreet, Suite 100 Indianapolis, Indiana	46240
(Address of Principal Executive Offices)	(Zip Code)

Registrant's Telephone Number, Including Area Code: (317) 808-6000

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Duke Realty Corporation Yes x  No   o Duke Realty Limited Partnership Yes x  No   o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

Duke Realty Corporation Yes x No  o Duke Realty Limited Partnership Yes x No  o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of "large accelerated filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act.

Duke Realty Corporation:

Large accelerated filer  x Accelerated filer  o Non-accelerated filer  o Smaller reporting company  o

Duke Realty Limited Partnership:

Large accelerated filer  o Accelerated filer  o Non-accelerated filer  x Smaller reporting company  o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act):

Duke Realty Corporation Yes  o No  x Duke Realty Limited Partnership Yes  o No  x

Indicate the number of shares outstanding of each of the issuer's classes of common stock, as of the latest practicable date:

Class	Outstanding Common Shares of Duke Realty Corporation at August 1, 2016
Common Stock, $.01 par value per share	350,757,501

EXPLANATORY NOTE

This report combines the quarterly reports on Form 10-Q for the period ended June 30, 2016 of both Duke Realty Corporation and Duke Realty Limited Partnership. Unless stated otherwise or the context otherwise requires, references to "Duke Realty Corporation" or the "General Partner" mean Duke Realty Corporation and its consolidated subsidiaries; and references to the "Partnership" mean Duke Realty Limited Partnership and its consolidated subsidiaries. The terms the "Company," "we," "us" and "our" refer to the General Partner and the Partnership, collectively, and those entities owned or controlled by the General Partner and/or the Partnership.

Duke Realty Corporation is a self-administered and self-managed real estate investment trust ("REIT") and is the sole general partner of the Partnership, owning 99.0% of the common partnership interests of the Partnership ("General Partner Units") as of June 30, 2016. The remaining 1.0% of the common partnership interests ("Limited Partner Units" and, together with the General Partner Units, the "Common Units") are owned by limited partners. As the sole general partner of the Partnership, the General Partner has full, exclusive and complete responsibility and discretion in the day-to-day management and control of the Partnership.

The General Partner and the Partnership are operated as one enterprise. The management of the General Partner consists of the same members as the management of the Partnership. As the sole general partner with control of the Partnership, the General Partner consolidates the Partnership for financial reporting purposes, and the General Partner does not have any significant assets other than its investment in the Partnership. Therefore, the assets and liabilities of the General Partner and the Partnership are substantially the same.

We believe combining the quarterly reports on Form 10-Q of the General Partner and the Partnership into this single report results in the following benefits:

• enhances investors' understanding of the General Partner and the Partnership by enabling investors to view the business as a whole in the same manner as management views and operates the business;

• eliminates duplicative disclosure and provides a more streamlined and readable presentation of information since a substantial portion of the Company's disclosure applies to both the General Partner and the Partnership; and

• creates time and cost efficiencies through the preparation of one combined report instead of two separate reports.

We believe it is important to understand the few differences between the General Partner and the Partnership in the context of how we operate as an interrelated consolidated company. The General Partner's only material asset is its ownership of partnership interests in the Partnership. As a result, the General Partner does not conduct business itself, other than acting as the sole general partner of the Partnership and issuing public equity from time to time. The General Partner does not issue any indebtedness, but does guarantee some of the unsecured debt of the Partnership. The Partnership holds substantially all the assets of the business, directly or indirectly, and holds the ownership interests related to certain of the Company's investments. The Partnership conducts the operations of the business and has no publicly traded equity. Except for net proceeds from equity issuances by the General Partner, which are contributed to the Partnership in exchange for General Partner Units or Preferred Units, the Partnership generates the capital required by the business through its operations, its incurrence of indebtedness and the issuance of Limited Partner Units to third parties.

Noncontrolling interests, shareholders' equity and partners' capital are the main areas of difference between the consolidated financial statements of the General Partner and those of the Partnership. The noncontrolling interests in the Partnership's financial statements include the interests in consolidated investees not wholly owned by the Partnership. The noncontrolling interests in the General Partner's financial statements include the same noncontrolling interests at the Partnership level, as well as the common limited partnership interests in the Partnership, which are accounted for as partners' capital by the Partnership.

In order to highlight the differences between the General Partner and the Partnership, there are separate sections in this report, as applicable, that separately discuss the General Partner and the Partnership, including separate financial statements and separate Exhibit 31 and 32 certifications. In the sections that combine disclosure of the General Partner and the Partnership, this report refers to actions or holdings as being actions or holdings of the collective Company.

DUKE REALTY CORPORATION/DUKE REALTY LIMITED PARTNERSHIP

INDEX

			Page
Part I - Financial Information
Item 1.		Financial Statements
	Duke Realty Corporation:
		Consolidated Balance Sheets - June 30, 2016 (Unaudited) and December 31, 2015	3
		Consolidated Statements of Operations and Comprehensive Income (Unaudited) - Three and Six Months Ended June 30, 2016 and 2015	4
		Consolidated Statements of Cash Flows (Unaudited) - Six Months Ended June 30, 2016 and 2015	5
		Consolidated Statement of Changes in Equity (Unaudited) - Six Months Ended June 30, 2016	6
	Duke Realty Limited Partnership:
		Consolidated Balance Sheets - June 30, 2016 (Unaudited) and December 31, 2015	7
		Consolidated Statements of Operations and Comprehensive Income (Unaudited) - Three and Six Months Ended June 30, 2016 and 2015	8
		Consolidated Statements of Cash Flows (Unaudited) - Six Months Ended June 30, 2016 and 2015	9
		Consolidated Statement of Changes in Equity (Unaudited) - Six Months Ended June 30, 2016	10
	Duke Realty Corporation and Duke Realty Limited Partnership:
		Notes to Consolidated Financial Statements (Unaudited)	11
Item 2.		Management's Discussion and Analysis of Financial Condition and Results of Operations	25
Item 3.		Quantitative and Qualitative Disclosures About Market Risk	48
Item 4.		Controls and Procedures	49
Part II - Other Information
Item 1.		Legal Proceedings	51
Item 1A.		Risk Factors	51
Item 2.		Unregistered Sales of Equity Securities and Use of Proceeds	51
Item 3.		Defaults Upon Senior Securities	51
Item 4.		Mine Safety Disclosures	51
Item 5.		Other Information	51
Item 6.		Exhibits	52

2

PART I - FINANCIAL INFORMATION

Item 1. Financial Statements

DUKE REALTY CORPORATION AND SUBSIDIARIES

Consolidated Balance Sheets

(in thousands, except per share amounts)

	June 30, 2016			December 31, 2015
	(Unaudited)
ASSETS
Real estate investments:
Land and improvements	$	1,514,975		$	1,391,763
Buildings and tenant improvements	5,008,656			4,740,837
Construction in progress	213,962			321,062
Investments in and advances to unconsolidated companies	289,299			268,390
Undeveloped land	307,627			383,045
	7,334,519			7,105,097
Accumulated depreciation	(1,290,102		)	(1,192,425		)
Net real estate investments	6,044,417			5,912,672
Real estate investments and other assets held-for-sale	3,462			45,801
Cash and cash equivalents	91,700			22,533
Accounts receivable, net of allowance of $1,170 and $1,113	21,439			18,846
Straight-line rent receivable, net of allowance of $6,243 and $6,155	120,096			116,781
Receivables on construction contracts, including retentions	13,437			16,459
Deferred leasing and other costs, net of accumulated amortization of $257,712 and $245,426	345,472			346,374
Escrow deposits and other assets	225,002			416,049
	$	6,865,025		$	6,895,515
LIABILITIES AND EQUITY
Indebtedness:
Secured debt, net of deferred financing costs of $1,161 and $1,552	$	389,679		$	738,444
Unsecured debt, net of deferred financing costs of $24,427 and $20,046	2,808,102			2,510,697
Unsecured line of credit	—			71,000
	3,197,781			3,320,141
Liabilities related to real estate investments held-for-sale	645			972
Construction payables and amounts due subcontractors, including retentions	46,100			54,921
Accrued real estate taxes	78,117			71,617
Accrued interest	31,837			34,447
Other accrued expenses	34,338			61,827
Other liabilities	94,391			106,283
Tenant security deposits and prepaid rents	41,607			40,506
Total liabilities	3,524,816			3,690,714
Shareholders' equity:
Common shares ($.01 par value); 600,000 shares authorized; 350,273 and 345,285 shares issued and outstanding	3,503			3,453
Additional paid-in capital	5,068,217			4,961,923
Accumulated other comprehensive income	1,216			1,806
Distributions in excess of net income	(1,758,547		)	(1,785,250		)
Total shareholders' equity	3,314,389			3,181,932
Noncontrolling interests	25,820			22,869
Total equity	3,340,209			3,204,801
	$	6,865,025		$	6,895,515

See accompanying Notes to Consolidated Financial Statements

3

DUKE REALTY CORPORATION AND SUBSIDIARIES

Consolidated Statements of Operations and Comprehensive Income

For the three and six months endedJune 30,

(in thousands, except per share amounts)

(Unaudited)

	Three Months Ended						Six Months Ended
	2016			2015			2016			2015
Revenues:
Rental and related revenue	$	200,520		$	201,996		$	402,323		$	416,611
General contractor and service fee revenue	26,044			23,901			49,195			76,722
	226,564			225,897			451,518			493,333
Expenses:
Rental expenses	25,729			30,094			55,008			66,218
Real estate taxes	29,948			27,747			59,575			58,526
General contractor and other services expenses	22,228			21,738			43,148			68,762
Depreciation and amortization	80,161			78,334			157,959			160,237
	158,066			157,913			315,690			353,743
Other operating activities:
Equity in earnings of unconsolidated companies	3,534			15,123			25,394			21,369
Gain on dissolution of unconsolidated company	30,697			—			30,697			—
Promote income	24,087			—			24,087			—
Gain on sale of properties	39,314			107,410			54,891			130,894
Gain on land sales	707			17,012			837			22,437
Other operating expenses	(836		)	(1,555		)	(2,072		)	(3,112		)
Impairment charges	(5,651		)	(5,470		)	(12,056		)	(5,470		)
General and administrative expenses	(11,584		)	(19,238		)	(29,682		)	(36,242		)
	80,268			113,282			92,096			129,876
Operating income	148,766			181,266			227,924			269,466
Other income (expenses):
Interest and other income, net	567			1,375			3,090			1,713
Interest expense	(37,184		)	(42,976		)	(74,914		)	(92,567		)
Loss on debt extinguishment	(2,430		)	(82,653		)	(2,430		)	(82,653		)
Acquisition-related activity	(72		)	(1,305		)	(75		)	(1,333		)
Income from continuing operations before income taxes	109,647			55,707			153,595			94,626
Income tax benefit (expense)	157			2,288			(186		)	804
Income from continuing operations	109,804			57,995			153,409			95,430
Discontinued operations:
Income before gain on sales	127			36			364			10,195
Gain on sale of depreciable properties, net of tax	252			396,134			166			414,509
Income from discontinued operations	379			396,170			530			424,704
Net income	110,183			454,165			153,939			520,134
Net income attributable to noncontrolling interests	(1,116		)	(4,785		)	(1,565		)	(5,510		)
Net income attributable to common shareholders	$	109,067		$	449,380		$	152,374		$	514,624
Basic net income per common share:
Continuing operations attributable to common shareholders	$	0.31		$	0.16		$	0.44		$	0.27
Discontinued operations attributable to common shareholders	—			1.14			—			1.22
Total	$	0.31		$	1.30		$	0.44		$	1.49
Diluted net income per common share:
Continuing operations attributable to common shareholders	$	0.31		$	0.16		$	0.44		$	0.27
Discontinued operations attributable to common shareholders	—			1.14			—			1.22
Total	$	0.31		$	1.30		$	0.44		$	1.49
Weighted average number of common shares outstanding	347,464			345,098			346,564			344,849
Weighted average number of common shares and potential dilutive securities	354,433			349,161			352,227			348,945
Comprehensive income:
Net income	$	110,183		$	454,165		$	153,939		$	520,134
Other comprehensive loss:
Amortization of interest contracts	(295		)	(276		)	(590		)	(563		)
Other	—			(123		)	—			(123		)
Total other comprehensive loss	(295		)	(399		)	(590		)	(686		)
Comprehensive income	$	109,888		$	453,766		$	153,349		$	519,448

See accompanying Notes to Consolidated Financial Statements

4

DUKE REALTY CORPORATION AND SUBSIDIARIES

Consolidated Statements of Cash Flows

For the six months endedJune 30,

(in thousands)

(Unaudited)

	2016			2015
Cash flows from operating activities:
Net income	$	153,939		$	520,134
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	126,594			128,624
Amortization of deferred leasing and other costs	31,365			35,130
Amortization of deferred financing costs	2,608			3,835
Straight-line rental income and expense, net	(5,768		)	(12,775		)
Impairment charges	12,056			5,470
Loss on debt extinguishment	2,430			82,653
Gain on dissolution of unconsolidated company	(30,697		)	—
Accrued promote income	(24,087		)	—
Gains on land and depreciated property sales	(55,894		)	(571,060		)
Third-party construction contracts, net	723			4,956
Other accrued revenues and expenses, net	(5,817		)	(11,924		)
Operating distributions received less than equity in earnings from unconsolidated companies	(16,080		)	(9,391		)
Net cash provided by operating activities	191,372			175,652
Cash flows from investing activities:
Development of real estate investments	(213,262		)	(109,617		)
Acquisition of real estate investments and related intangible assets	(16,029		)	(20,929		)
Acquisition of undeveloped land	(27,243		)	(25,579		)
Second generation tenant improvements, leasing costs and building improvements	(30,237		)	(30,871		)
Other deferred leasing costs	(14,993		)	(22,302		)
Other assets	182,996			(94,745		)
Proceeds from land and depreciated property sales, net	174,882			1,305,794
Capital distributions from unconsolidated companies	36,328			67,004
Capital contributions and advances to unconsolidated companies	(50,955		)	(50,208		)
Net cash provided by investing activities	41,487			1,018,547
Cash flows from financing activities:
Proceeds from issuance of common shares, net	99,844			4,756
Proceeds from unsecured debt	375,000			—
Payments on unsecured debt	(75,668		)	(759,354		)
Payments on secured indebtedness including principal amortization	(348,743		)	(207,169		)
Repayments of line of credit, net	(71,000		)	(106,000		)
Distributions to common shareholders	(124,651		)	(117,274		)
Distributions to noncontrolling interests	(1,304		)	(1,394		)
Change in book overdrafts	(10,974		)	(5,322		)
Deferred financing costs	(6,196		)	(110		)
Net cash used for financing activities	(163,692		)	(1,191,867		)
Net increase in cash and cash equivalents	69,167			2,332
Cash and cash equivalents at beginning of period	22,533			17,922
Cash and cash equivalents at end of period	$	91,700		$	20,254
Non-cash investing and financing activities:
Mortgage notes receivable from buyers in property sales	$	1,685		$	200,000
Conversion of Limited Partner Units to common shares	$	185		$	(1,693	)

See accompanying Notes to Consolidated Financial Statements

5

DUKE REALTY CORPORATION AND SUBSIDIARIES

Consolidated Statement of Changes in Equity

For the six months endedJune 30, 2016

(in thousands, except per share data)

(Unaudited)

	Common Shareholders
		Common Stock		Additional Paid-in Capital		Accumulated Other Comprehensive Income			Distributions in Excess of Net Income			Noncontrolling Interests			Total
Balance at December 31, 2015		$	3,453	$	4,961,923	$	1,806		$	(1,785,250	)	$	22,869		$	3,204,801
Net income				—		—			152,374			1,565			153,939
Other comprehensive loss		—		—		(590		)	—			—			(590		)
Issuance of common shares		42		99,802		—			—			—			99,844
Stock-based compensation plan activity		8		6,307		—			(1,020		)	2,875			8,170
Conversion of Limited Partner Units		—		185		—			—			(185		)	—
Distributions to common shareholders ($0.36 per share)		—		—		—			(124,651		)	—			(124,651		)
Distributions to noncontrolling interests		—		—		—			—			(1,304		)	(1,304		)
Balance at June 30, 2016		$	3,503	$	5,068,217	$	1,216		$	(1,758,547	)	$	25,820		$	3,340,209

See accompanying Notes to Consolidated Financial Statements

6

DUKE REALTY LIMITED PARTNERSHIP AND SUBSIDIARIES

Consolidated Balance Sheets

(in thousands)

	June 30, 2016			December 31, 2015
	(Unaudited)
ASSETS
Real estate investments:
Land and improvements	$	1,514,975		$	1,391,763
Buildings and tenant improvements	5,008,656			4,740,837
Construction in progress	213,962			321,062
Investments in and advances to unconsolidated companies	289,299			268,390
Undeveloped land	307,627			383,045
	7,334,519			7,105,097
Accumulated depreciation	(1,290,102		)	(1,192,425		)
Net real estate investments	6,044,417			5,912,672
Real estate investments and other assets held-for-sale	3,462			45,801
Cash and cash equivalents	91,700			22,533
Accounts receivable, net of allowance of $1,170 and $1,113	21,439			18,846
Straight-line rent receivable, net of allowance of $6,243 and $6,155	120,096			116,781
Receivables on construction contracts, including retentions	13,437			16,459
Deferred leasing and other costs, net of accumulated amortization of $257,712 and $245,426	345,472			346,374
Escrow deposits and other assets	225,002			416,049
	$	6,865,025		$	6,895,515
LIABILITIES AND EQUITY
Indebtedness:
Secured debt, net of deferred financing cost of $1,161 and $1,552	$	389,679		$	738,444
Unsecured debt, net of deferred financing cost of $24,427 and $20,046	2,808,102			2,510,697
Unsecured line of credit	—			71,000
	3,197,781			3,320,141
Liabilities related to real estate investments held-for-sale	645			972
Construction payables and amounts due subcontractors, including retentions	46,100			54,921
Accrued real estate taxes	78,117			71,617
Accrued interest	31,837			34,447
Other accrued expenses	34,338			61,827
Other liabilities	94,391			106,283
Tenant security deposits and prepaid rents	41,607			40,506
Total liabilities	3,524,816			3,690,714
Partners' equity:
Common equity (350,273 and 345,285 General Partner Units issued and outstanding)	3,313,173			3,180,126
	3,313,173			3,180,126
Limited Partners' common equity (3,496 and 3,487 Limited Partner Units issued and outstanding)	23,009			20,032
Accumulated other comprehensive income	1,216			1,806
Total partners' equity	3,337,398			3,201,964
Noncontrolling interests	2,811			2,837
Total equity	3,340,209			3,204,801
	$	6,865,025		$	6,895,515

See accompanying Notes to Consolidated Financial Statements

7

DUKE REALTY LIMITED PARTNERSHIP AND SUBSIDIARIES

Consolidated Statements of Operations and Comprehensive Income

For the three and six months endedJune 30,

(in thousands, except per unit amounts)

(Unaudited)

	Three Months Ended						Six Months Ended
	2016			2015			2016			2015
Revenues:
Rental and related revenue	$	200,520		$	201,996		$	402,323		$	416,611
General contractor and service fee revenue	26,044			23,901			49,195			76,722
	226,564			225,897			451,518			493,333
Expenses:
Rental expenses	25,729			30,094			55,008			66,218
Real estate taxes	29,948			27,747			59,575			58,526
General contractor and other services expenses	22,228			21,738			43,148			68,762
Depreciation and amortization	80,161			78,334			157,959			160,237
	158,066			157,913			315,690			353,743
Other operating activities:
Equity in earnings of unconsolidated companies	3,534			15,123			25,394			21,369
Gain on dissolution of unconsolidated company	30,697			—			30,697			—
Promote income	24,087			—			24,087			—
Gain on sale of properties	39,314			107,410			54,891			130,894
Gain on land sales	707			17,012			837			22,437
Other operating expenses	(836		)	(1,555		)	(2,072		)	(3,112		)
Impairment charges	(5,651		)	(5,470		)	(12,056		)	(5,470		)
General and administrative expenses	(11,584		)	(19,238		)	(29,682		)	(36,242		)
	80,268			113,282			92,096			129,876
Operating income	148,766			181,266			227,924			269,466
Other income (expenses):
Interest and other income, net	567			1,375			3,090			1,713
Interest expense	(37,184		)	(42,976		)	(74,914		)	(92,567		)
Loss on debt extinguishment	(2,430		)	(82,653		)	(2,430		)	(82,653		)
Acquisition-related activity	(72		)	(1,305		)	(75		)	(1,333		)
Income from continuing operations before income taxes	109,647			55,707			153,595			94,626
Income tax benefit (expense)	157			2,288			(186		)	804
Income from continuing operations	109,804			57,995			153,409			95,430
Discontinued operations:
Income before gain on sales	127			36			364			10,195
Gain on sale of depreciable properties, net of tax	252			396,134			166			414,509
Income from discontinued operations	379			396,170			530			424,704
Net income	110,183			454,165			153,939			520,134
Net income attributable to noncontrolling interests	(15		)	(23		)	(26		)	(49		)
Net income attributable to common unitholders	$	110,168		$	454,142		$	153,913		$	520,085
Basic net income per Common Unit:
Continuing operations attributable to common unitholders	$	0.31		$	0.16		$	0.44		$	0.27
Discontinued operations attributable to common unitholders	—			1.14			—			1.22
Total	$	0.31		$	1.30		$	0.44		$	1.49
Diluted net income per Common Unit:
Continuing operations attributable to common unitholders	$	0.31		$	0.16		$	0.44		$	0.27
Discontinued operations attributable to common unitholders	—			1.14			—			1.22
Total	$	0.31		$	1.30		$	0.44		$	1.49
Weighted average number of Common Units outstanding	350,968			348,728			350,065			348,511
Weighted average number of Common Units and potential dilutive securities	354,433			349,161			352,227			348,945
Comprehensive income:
Net income	$	110,183		$	454,165		$	153,939		$	520,134
Other comprehensive loss:
Amortization of interest contracts	(295		)	(276		)	(590		)	(563		)
Other	—			(123		)	—			(123		)
Total other comprehensive loss	(295		)	(399		)	(590		)	(686		)
Comprehensive income	$	109,888		$	453,766		$	153,349		$	519,448

See accompanying Notes to Consolidated Financial Statements

8

DUKE REALTY LIMITED PARTNERSHIP AND SUBSIDIARIES

Consolidated Statements of Cash Flows

For the six months endedJune 30,

(in thousands)

(Unaudited)

	2016			2015
Cash flows from operating activities:
Net income	$	153,939		$	520,134
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	126,594			128,624
Amortization of deferred leasing and other costs	31,365			35,130
Amortization of deferred financing costs	2,608			3,835
Straight-line rental income and expense, net	(5,768		)	(12,775		)
Impairment charges	12,056			5,470
Loss on debt extinguishment	2,430			82,653
Gain on dissolution of unconsolidated company	(30,697		)	—
Accrued promote income	(24,087		)	—
Gains on land and depreciated property sales	(55,894		)	(571,060		)
Third-party construction contracts, net	723			4,956
Other accrued revenues and expenses, net	(5,817		)	(11,875		)
Operating distributions received less than equity in earnings from unconsolidated companies	(16,080		)	(9,391		)
Net cash provided by operating activities	191,372			175,701
Cash flows from investing activities:
Development of real estate investments	(213,262		)	(109,617		)
Acquisition of real estate investments and related intangible assets	(16,029		)	(20,929		)
Acquisition of undeveloped land	(27,243		)	(25,579		)
Second generation tenant improvements, leasing costs and building improvements	(30,237		)	(30,871		)
Other deferred leasing costs	(14,993		)	(22,302		)
Other assets	182,996			(94,745		)
Proceeds from land and depreciated property sales, net	174,882			1,305,794
Capital distributions from unconsolidated companies	36,328			67,004
Capital contributions and advances to unconsolidated companies	(50,955		)	(50,208		)
Net cash provided by investing activities	41,487			1,018,547
Cash flows from financing activities:
Contributions from the General Partner	99,844			4,707
Proceeds from unsecured debt	375,000			—
Payments on unsecured debt	(75,668		)	(759,354		)
Payments on secured indebtedness including principal amortization	(348,743		)	(207,169		)
Repayments of line of credit, net	(71,000		)	(106,000		)
Distributions to common unitholders	(125,903		)	(118,525		)
Distributions to noncontrolling interests	(52		)	(143		)
Change in book overdrafts	(10,974		)	(5,322		)
Deferred financing costs	(6,196		)	(110		)
	(163,692		)	(1,191,916		)
Net increase in cash and cash equivalents	69,167			2,332
Cash and cash equivalents at beginning of period	22,533			17,922
Cash and cash equivalents at end of period	$	91,700		$	20,254
Non-cash investing and financing activities:
Mortgage notes receivable from buyers in property sales	$	1,685		$	200,000
Conversion of Limited Partner Units to common shares of the General Partner	$	185		$	(1,693	)

See accompanying Notes to Consolidated Financial Statements

9

DUKE REALTY LIMITED PARTNERSHIP AND SUBSIDIARIES

Consolidated Statement of Changes in Equity

For the six months endedJune 30, 2016

(in thousands, except per unit data)

(Unaudited)

	Common Unitholders
	General			Limited			Accumulated
	Partner's			Partners'			Other			Total
	Common Equity			Common Equity			Comprehensive Income			Partners' Equity			Noncontrolling Interests			Total Equity
Balance at December 31, 2015	$	3,180,126		$	20,032		$	1,806		$	3,201,964		$	2,837		$	3,204,801
Net income	152,374			1,539			—			153,913			26			153,939
Other comprehensive loss	—			—			(590		)	(590		)	—			(590		)
Capital contribution from the General Partner	99,844			—			—			99,844			—			99,844
Stock-based compensation plan activity	5,295			2,875			—			8,170			—			8,170
Conversion of Limited Partner Units to common shares of the General Partner	185			(185		)	—			—			—			—
Distributions to Partners ($0.36 per Common Unit)	(124,651		)	(1,252		)	—			(125,903		)	—			(125,903		)
Distributions to noncontrolling interests	—			—			—			—			(52		)	(52		)
Balance at June 30, 2016	$	3,313,173		$	23,009		$	1,216		$	3,337,398		$	2,811		$	3,340,209

See accompanying Notes to Consolidated Financial Statements

10

DUKE REALTY CORPORATION AND DUKE REALTY LIMITED PARTNERSHIP

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1.    General Basis of Presentation

The interim consolidated financial statements included herein have been prepared by Duke Realty Corporation (the "General Partner") and Duke Realty Limited Partnership (the "Partnership"). In this Quarterly Report on Form 10-Q ("Report"), unless the context indicates otherwise, the terms "Company," "we," "us" and "our" refer to the General Partner and the Partnership, collectively, and those entities owned or controlled by the General Partner and/or the Partnership. The 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 real estate investment trust ("REIT") under the provisions of the Internal Revenue Code of 1986, as amended (the "Code"). The Partnership was formed on October 4, 1993, when the General Partner contributed all of its properties and related assets and liabilities, together with the net proceeds from an offering of additional shares of its common stock, to the Partnership. Simultaneously, the Partnership completed the acquisition of Duke Associates, a full-service commercial real estate firm operating in the Midwest whose operations began in 1972.

The General Partner is the sole general partner of the Partnership, owning approximately 99.0% of the common partnership interests of the Partnership ("General Partner Units") at June 30, 2016. The remaining 1.0% of the common partnership interests ("Limited Partner Units" and, together with the General Partner Units, the "Common Units") are owned by limited partners. As the sole general partner of the Partnership, the General Partner has full, exclusive and complete responsibility and discretion in the day-to-day management and control of the Partnership. The General Partner and the Partnership are operated as one enterprise. The management of the General Partner consists of the same members as the management of the Partnership. As the sole general partner with control of the Partnership, the General Partner consolidates the Partnership for financial reporting purposes, and the General Partner does not have any significant assets other than its investment in the Partnership. Therefore, the assets and liabilities of the General Partner and the Partnership are substantially the same.

Limited Partners have the right to redeem their Limited Partner Units, subject to certain restrictions. Pursuant to the Fifth Amended and Restated Agreement of Limited Partnership, as amended (the "Partnership Agreement"), the General Partner is obligated to redeem the Limited Partner Units in shares of its common stock, unless it determines in its reasonable discretion that the issuance of shares of its common stock could cause it to fail to qualify as a REIT. Each Limited Partner Unit shall be redeemed for one share of the General Partner's common stock, or, in the event that the issuance of shares could cause the General Partner to fail to qualify as a REIT, cash equal to the fair market value of one share of the General Partner's common stock at the time of redemption, in each case, subject to certain adjustments described in the Partnership Agreement. The Limited Partner Units are not required, per the terms of the Partnership Agreement, to be redeemed in registered shares of the General Partner.

As of June 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

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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.

2.    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 the company expects to be entitled in exchange for fulfilling those performance obligations. In doing so, companies will need to exercise more judgment and make more estimates than under existing GAAP guidance.

ASU 2014-09 will be effective for public entities for annual and interim reporting periods beginning after December 15, 2017 and early adoption is permitted in periods ending after December 15, 2016. ASU 2014-09 allows for either recognizing the cumulative effect of application (i) at the start of the earliest comparative period presented (with the option to use any or all of three practical expedients) or (ii) at the date of initial application, with no restatement of comparative periods presented.

We have not yet selected a transition method nor have we determined the effect of ASU 2014-09 on our consolidated financial statements.

Consolidation

In February 2015, the FASB issued ASU 2015-02, Amendments to the Consolidation Analysis ("ASU 2015-02"). ASU 2015-02 makes targeted amendments to the current consolidation guidance and ends the deferral granted to investment companies from applying the existing variable interest entity ("VIE") guidance. ASU 2015-02 is 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 requires 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 is effective 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 amends the retroactive requirement to apply adjustments made to provisional amounts recognized in a business combination. The update requires 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 is effective for annual and interim periods

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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 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 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.

3.    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.

4.    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.

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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 June 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 $75.5 million at June 30, 2016.

5.    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. With the exception of certain properties that have been sold or classified as held for sale, the results of operations for all acquired properties have been included in continuing operations within our consolidated financial statements since their respective dates of acquisition.

Acquisitions

We acquired two properties during the six months ended June 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:

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 $364,000 in rental revenues and $89,000 in income from continuing operations during the six months ended June 30, 2016 for the properties since their respective dates of acquisition.

Distribution of Joint Venture Properties

Included in our property acquisitions for the six months ended June 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):

14

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

The plan of dissolution for Duke/Hulfish also contained provisions that effectively established a minimum amount of promote income (additional incentive-based cash distributions from the joint venture, in excess of our 20% ownership interest) to which we would be entitled. This amount, totaling $24.1 million, was recognized during the six months ended June 30, 2016 and is reflected within investments in and advances to unconsolidated companies on our consolidated Balance Sheet as of June 30, 2016. This amount was fully collected in late July 2016 when Duke/Hulfish sold its last remaining property to a third party.

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 six months ended June 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 $174.9 million and $1.31 billion during the six months ended June 30, 2016 and 2015, respectively.

6.    Indebtedness

All debt is held directly or indirectly by the Partnership. The General Partner does not have any indebtedness, but does guarantee some of the unsecured debt of the Partnership. The following table summarizes the book value and changes in the fair value of our debt for the six months endedJune 30, 2016 (in thousands):

15

	Book Value at 12/31/2015		Book Value at 6/30/2016		Fair Value at 12/31/2015		Issuances and Assumptions		Payments/Payoffs			Adjustments to Fair Value			Fair Value at 6/30/2016
Fixed rate secured debt	$	736,896	$	387,740	$	789,095	$	—	$	(348,702	)	$	(1,346	)	$	439,047
Variable rate secured debt	3,100		3,100		3,100		—		—			—			3,100
Unsecured debt	2,530,743		2,832,529		2,624,795		375,000		(73,214		)	80,343			3,006,924
Unsecured line of credit	71,000		—		70,852		—		(71,000		)	148			—
Total	$	3,341,739	$	3,223,369	$	3,487,842	$	375,000	$	(492,916	)	$	79,145		$	3,449,071
Less: Deferred financing costs	21,598		25,588
Total indebtedness as reported on the consolidated balance sheets	$	3,320,141	$	3,197,781

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 3.10%, depending on the attributes of the specific loans. The current market rates we utilized were internally estimated; therefore, we have concluded that our determination of fair value for our fixed rate secured debt was primarily based upon level 3 inputs.

During the six months endedJune 30, 2016, we repaid four loans, totaling $344.7 million, which had a weighted average stated rate of 5.90%.

Unsecured Debt

At June 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 101.00% to 133.00% of face value.

In June 2016, we issued $375.0 million of 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% notes due February 2017, for a cash payment of $74.5 million.

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 1.60% 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

16

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 June 30, 2016.

Unsecured Line of Credit

Our unsecured line of credit at June 30, 2016 is described as follows (in thousands):

Description	Maximum Capacity		Maturity Date	Outstanding Balance at June 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 $1.6 billion. This line of credit provides us with an option to obtain borrowings from financial institutions that participate in the line at rates that may be lower than the stated interest rate, subject to certain restrictions.

This line of credit contains financial covenants that require us to meet certain financial ratios and defined levels of performance, including those related to fixed charge coverage, unsecured interest expense coverage and debt-to-asset value (with asset value being defined in the Partnership's unsecured line of credit agreement). At June 30, 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.

7.    Shareholders' Equity of the General Partner and Partners' Capital of the Partnership

General Partner

During the six months endedJune 30, 2016, the General Partner issued 4.2 million common shares pursuant to its at the market equity program, generating gross proceeds of approximately $99.6 million and, after deducting commissions and other costs, net proceeds of approximately $98.5 million. The proceeds from these offerings were contributed to the Partnership and used for general corporate purposes.

Partnership

For each common share or preferred share that the General Partner issues, the Partnership issues a corresponding General Partner Unit or Preferred Unit, as applicable, to the General Partner in exchange for the contribution of the proceeds from the stock issuance. Similarly, when the General Partner redeems or repurchases common shares or preferred shares, the Partnership redeems the corresponding Common Units or Preferred Units held by the General Partner at the same price.

17

8.    Related Party Transactions

We provide property management, asset management, leasing, construction and other tenant-related services to unconsolidated companies in which we have equity interests. We recorded the corresponding fees based on contractual terms that approximate market rates for these types of services and have eliminated our ownership percentage of these fees in the consolidated financial statements. The following table summarizes the fees earned from these companies, prior to the elimination of our ownership percentage, for the three and six months endedJune 30, 2016 and 2015, respectively (in thousands): 

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2016		2015		2016		2015
Management fees	$	1,291	$	1,752	$	2,550	$	3,553
Leasing fees	1,053		389		1,432		1,022
Construction and development fees	2,239		725		5,359		1,130

9.    Net Income (Loss) Per Common Share or Common Unit

Basic net income (loss) per common share or Common Unit is computed by dividing net income (loss) attributable to common shareholders or common unitholders, less dividends or distributions on share-based awards expected to vest (referred to as "participating securities" and primarily composed of unvested restricted stock units), by the weighted average number of common shares or Common Units outstanding for the period.

Diluted net income (loss) per common share is computed by dividing the sum of basic net income (loss) attributable to common shareholders and the noncontrolling interest in earnings allocable to Limited Partner Units (to the extent the Limited Partner Units are dilutive) by the sum of the weighted average number of common shares outstanding and, to the extent they are dilutive, Units outstanding and any potential dilutive securities for the period. Diluted net income (loss) per Common Unit is computed by dividing the basic net income (loss) attributable to common unitholders by the sum of the weighted average number of Common Units outstanding and any potential dilutive securities for the period. The following table reconciles the components of basic and diluted net income per common share or Common Unit for the three and six months endedJune 30, 2016 and 2015, respectively (in thousands): 

18

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
General Partner
Net income attributable to common shareholders	$	109,067		$	449,380		$	152,374		$	514,624
Less: Dividends on participating securities	(582		)	(589		)	(1,171		)	(1,209		)
Basic net income attributable to common shareholders	108,485			448,791			151,203			513,415
Add back dividends on dilutive participating securities	582			—			569			—
Noncontrolling interest in earnings of common unitholders	1,101			4,762			1,539			5,461
Diluted net income attributable to common shareholders	$	110,168		$	453,553		$	153,311		$	518,876
Weighted average number of common shares outstanding	347,464			345,098			346,564			344,849
Weighted average Limited Partner Units outstanding	3,504			3,630			3,501			3,662
Other potential dilutive shares	3,465			433			2,162			434
Weighted average number of common shares and potential dilutive securities	354,433			349,161			352,227			348,945
Partnership
Net income attributable to common unitholders	$	110,168		$	454,142		$	153,913		$	520,085
Less: Distributions on participating securities	(582		)	(589		)	(1,171		)	(1,209		)
Basic net income attributable to common unitholders	$	109,586		$	453,553		$	152,742		$	518,876
Add back distributions on dilutive participating securities	582			—			569			—
Diluted net income attributable to common unitholders	$	110,168		$	453,553		$	153,311		$	518,876
Weighted average number of Common Units outstanding	350,968			348,728			350,065			348,511
Other potential dilutive units	3,465			433			2,162			434
Weighted average number of Common Units and potential dilutive securities	354,433			349,161			352,227			348,945

The following table summarizes the data that is excluded from the computation of net income per common share or Common Unit as a result of being anti-dilutive (in thousands):

	Three Months Ended June 30,		Six Months Ended June 30,
	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	307	997
Outstanding participating securities	—	3,463	1,706	3,463

10.    Segment Reporting

Reportable Segments

We had three reportable operating segments at June 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, for the three and six months endedJune 30, 2016 and 2015, respectively (in thousands): 

19

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Revenues
Rental Operations:
Industrial	$	140,219	$	135,487	$	283,199	$	283,115
Medical Office	43,135		40,274		85,360		80,302
Non-reportable Rental Operations	13,529		23,691		28,425		48,826
Service Operations	26,044		23,901		49,195		76,722
Total segment revenues	222,927		223,353		446,179		488,965
Other revenue	3,637		2,544		5,339		4,368
Consolidated revenue from continuing operations	226,564		225,897		451,518		493,333
Discontinued operations	126		49		355		32,164
Consolidated revenue	$	226,690	$	225,946	$	451,873	$	525,497

Supplemental Performance Measure

Property level net operating income on a cash basis ("PNOI") is the non-GAAP supplemental performance measure that we use to evaluate the performance of, and to allocate resources among, the real estate investments in the reportable and operating segments that comprise our Rental Operations. PNOI for our Rental Operations segments is comprised of rental revenues from continuing operations less rental expenses and real estate taxes from continuing operations, along with certain other adjusting items (collectively referred to as "Rental Operations revenues and expenses excluded from PNOI," as shown in the following table). Additionally, we do not allocate interest expense, depreciation expense and certain other non-property specific revenues and expenses (collectively referred to as "Non-Segment Items," as shown in the following table) to our individual operating segments.

We evaluate the performance of our Service Operations reportable segment using net income or loss, as allocated to that segment ("Earnings from Service Operations").

The following table shows a reconciliation of our segment-level measures of profitability to consolidated income from continuing operations before income taxes for the three and six months endedJune 30, 2016 and 2015, respectively (in thousands and excluding discontinued operations): 

20

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
PNOI
Industrial	$	104,741		$	96,629		$	206,798		$	191,588
Medical Office	28,179			25,820			55,421			51,051
Non-reportable Rental Operations	8,903			9,870			18,069			17,762
PNOI, excluding all sold/held for sale properties	141,823			132,319			280,288			260,401
PNOI from sold/held-for-sale properties included in continuing operations	629			8,545			2,994			22,735
PNOI, continuing operations	$	142,452		$	140,864		$	283,282		$	283,136
Earnings from Service Operations	3,816			2,163			6,047			7,960
Rental Operations revenues and expenses excluded from PNOI:
Straight-line rental income and expense, net	2,893			3,956			5,824			11,107
Revenues related to lease buyouts	69			94			234			958
Amortization of lease concessions and above and below market rents	(425		)	(490		)	(1,058		)	(2,203		)
Intercompany rents and other adjusting items	(226		)	(412		)	(219		)	(872		)
Non-Segment Items:
Equity in earnings of unconsolidated companies	3,534			15,123			25,394			21,369
Gain on dissolution of unconsolidated company	30,697			—			30,697			—
Promote income	24,087			—			24,087			—
Interest expense	(37,184		)	(42,976		)	(74,914		)	(92,567		)
Depreciation and amortization expense	(80,161		)	(78,334		)	(157,959		)	(160,237		)
Gain on sale of properties	39,314			107,410			54,891			130,894
Impairment charges on non-depreciable properties	(5,651		)	(5,470		)	(12,056		)	(5,470		)
Interest and other income, net	567			1,375			3,090			1,713
General and administrative expenses	(11,584		)	(19,238		)	(29,682		)	(36,242		)
Gain on land sales	707			17,012			837			22,437
Other operating expenses	(836		)	(1,555		)	(2,072		)	(3,112		)
Loss on extinguishment of debt	(2,430		)	(82,653		)	(2,430		)	(82,653		)
Acquisition-related activity	(72		)	(1,305		)	(75		)	(1,333		)
Other non-segment revenues and expenses, net	80			143			(323		)	(259		)
Income from continuing operations before income taxes	$	109,647		$	55,707		$	153,595		$	94,626

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.

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Assets by Reportable Segment

The assets for each of the reportable segments at June 30, 2016 and December 31, 2015 were as follows (in thousands):

	June 30, 2016		December 31, 2015
Assets
Rental Operations:
Industrial	$	4,629,204	$	4,552,107
Medical Office	1,304,920		1,269,546
Non-reportable Rental Operations	313,195		367,469
Service Operations	132,622		137,257
Total segment assets	6,379,941		6,326,379
Non-segment assets	485,084		569,136
Consolidated assets	$	6,865,025	$	6,895,515

11.    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 June 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	9	91	101
Total properties sold or classified as held-for-sale	1	9	153	163

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 six months endedJune 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 for the three and six months endedJune 30, 2016 and 2015, respectively (in thousands):

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	Three Months Ended June 30,					Six Months Ended June 30,
	2016		2015			2016		2015
Revenues	$	126	$	49		$	355	$	32,164
Operating expenses	1		(13		)	9		(12,399		)
Depreciation and amortization	—		—			—		(3,517		)
Operating income	127		36			364		16,248
Interest expense	—		—			—		(6,053		)
Income before gain on sales	127		36			364		10,195
Gain on sale of depreciable properties	252		399,354			166		417,729
Income from discontinued operations before income taxes	379		399,390			530		427,924
Income tax expense	—		(3,220		)	—		(3,220		)
Income from discontinued operations	$	379	$	396,170		$	530	$	424,704

We had no capital expenditures for the six months endedJune 30, 2016 and $7.4 million for the six months endedJune 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, for the three and six months endedJune 30, 2016 and 2015, respectively (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Income from continuing operations attributable to common shareholders	$	108,692	$	57,333	$	151,850	$	94,382
Income from discontinued operations attributable to common shareholders	375		392,047		524		420,242
Net income attributable to common shareholders	$	109,067	$	449,380	$	152,374	$	514,624

Allocation of Noncontrolling Interests - Partnership

Substantially all of the income from discontinued operations for all periods presented in the Partnership's Consolidated Statements of Operations and Comprehensive Income is attributable to the common unitholders.

Properties Held-for-Sale

At June 30, 2016, one in-service property and 16 acres of undeveloped land were classified as held-for-sale but did not meet the criteria to be classified within discontinued operations. The following table illustrates aggregate balance sheet information for all held-for-sale properties at June 30, 2016 and December 31, 2015 (in thousands):

	Held-for-Sale Properties Included in Continuing Operations
	June 30, 2016			December 31, 2015
Land and improvements	$	603		$	9,797
Buildings and tenant improvements	3,329			39,480
Undeveloped land	596			—
Accumulated depreciation	(1,437		)	(7,183		)
Deferred leasing and other costs, net	11			3,293
Other assets	360			414
Total assets held-for-sale	$	3,462		$	45,801
Accrued expenses	$	43		$	322
Other liabilities	602			650
Total liabilities held-for-sale	$	645		$	972

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Impairment Charges

As the result of changes in our intended use or plans for sale of certain of our undeveloped land holdings, we recognized impairment charges of $12.1 million for the six months endedJune 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.

12.    Subsequent Events

Declaration of Dividends/Distributions

The General Partner's board of directors declared the following dividends/distributions at its regularly scheduled board meeting held on July 27, 2016:

Class of stock/units	Quarterly Amount per Share or Unit	Record Date	Payment Date
Common - Quarterly	$0.18	August 16, 2016	August 31, 2016

Debt Extinguishment

Subsequent to the tender offer described in Note 6, the remaining $203.0 million balance of our 5.95% notes due February 2017 were retired on July 23, 2016 for a cash payment of $209.0 million.

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Item 2.    Management's Discussion and Analysis of Financial Condition and Results of Operations

The following Management's Discussion and Analysis of Financial Condition and Results of Operations is intended to help the reader understand our operations and our present business environment. Management's Discussion and Analysis is provided as a supplement to and should be read in conjunction with our consolidated financial statements and the notes thereto, contained in Part I, Item I of this Report and the consolidated financial statements and notes thereto, contained in Part IV, Item 15 of our 2015 Annual Report.

Cautionary Notice Regarding Forward-Looking Statements

Certain statements contained in or incorporated by reference into this Report, including, without limitation, those related to our future operations, constitute "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. The words "believe," "estimate," "expect," "anticipate," "intend," "plan," "seek," "may," "could" and similar expressions or statements regarding future periods are intended to identify forward-looking statements, although not all forward-looking statements contain such words.

These forward-looking statements involve known and unknown risks, uncertainties and other important factors that could cause our actual results, performance or achievements, or industry results, to differ materially from any predictions of future results, performance or achievements that we express or imply in this Report. Some of the risks, uncertainties and other important factors that may affect future results include, among others:

• Changes in general economic and business conditions, including the financial condition of our tenants and the value of our real estate assets;

• The General Partner's continued qualification as a REIT for U.S. federal income tax purposes;

• Heightened competition for tenants and potential decreases in property occupancy;

• Potential changes in the financial markets and interest rates;

• Volatility in the General Partner's stock price and trading volume;

• Our continuing ability to raise funds on favorable terms;

• Our ability to successfully identify, acquire, develop and/or manage properties on terms that are favorable to us;

• Potential increases in real estate construction costs;

• Our ability to successfully dispose of properties on terms that are favorable to us, including, without limitation, through one or more transactions that are consistent with our previously disclosed strategic plans;

• Our ability to retain our current credit ratings;

• Inherent risks in the real estate business, including, but not limited to, tenant defaults, potential liability relating to environmental matters and liquidity of real estate investments; and

• Other risks and uncertainties described herein, as well as those risks and uncertainties discussed from time to time in our other reports and other public filings with the SEC.

Although we presently believe that the plans, expectations and results expressed in or suggested by the forward-looking statements contained or incorporated by reference into this Report are reasonable, all forward-looking statements are inherently subjective, uncertain and subject to change, as they involve substantial risks and uncertainties, including those beyond our control. New factors emerge from time to time, and it is not possible for us to predict the nature, or assess the potential impact, of each new factor on our business. Given these uncertainties, we caution you not to place undue reliance on these forward-looking statements. We undertake no obligation to update or revise any of our forward-looking statements for events or circumstances that arise after the statement is made, except as otherwise may be required by law.

The above list of risks and uncertainties is only a summary of some of the most important factors and is not intended to be exhaustive. Additional information regarding risk factors that may affect us is included in our 2015 Annual Report. The risk factors contained in our Annual Report are updated by us from time to time in Quarterly Reports on Form 10-Q and other public filings. 

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Business Overview

The General Partner is a self-administered and self-managed REIT that began operations in 1986 and is the sole general partner of the Partnership. The Partnership is a limited partnership formed in 1993, at which time all of the properties and related assets and liabilities of the General Partner, as well as proceeds from a secondary offering of the General Partner's common shares, were contributed 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. We operate the General Partner and the Partnership as one enterprise, and therefore, our discussion and analysis refers to the General Partner and its consolidated subsidiaries, including the Partnership, collectively. A more complete description of our business, and of management's philosophy and priorities, is included in our 2015 Annual Report.

At June 30, 2016, we:

• Owned or jointly controlled 574 primarily industrial and medical office properties, of which 556 properties with 133.6 million square feet were in service and 18 properties with 6.0 million square feet were under development. The 556 in-service properties were comprised of 497 consolidated properties with 119.7 million square feet and 59 jointly controlled unconsolidated properties with 14.0 million square feet. The 18 properties under development consisted of 16 consolidated properties with 4.7 million square feet and two jointly controlled unconsolidated properties with 1.3 million square feet.

• Owned directly, or through ownership interests in unconsolidated joint ventures (with acreage not adjusted for our percentage ownership interest), approximately 2,900 acres of land and controlled approximately 1,600 acres through purchase options.

A key component of our overall strategy is to continue to increase our investment in quality industrial properties in both existing and select new markets, to continue to increase our investment in on-campus or hospital affiliated medical office properties and to ultimately dispose of our remaining suburban office properties.

We had three reportable operating segments at June 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." The third reportable segment consists of various real estate services such as property management, asset management, maintenance, leasing, development, general contractor 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. Our Service Operations segment also includes our taxable REIT subsidiary, a legal entity through which certain of the segment's operations are conducted.

Key Performance Indicators

Our operating results depend primarily upon rental income from our Rental Operations. The following discussion highlights the areas of Rental Operations that we consider critical drivers of future revenues.

Occupancy Analysis

Our ability to maintain high occupancy rates is a principal driver of maintaining and increasing rental revenue. The following table sets forth percent leased and average net effective rent information regarding our in-service portfolio of rental properties, including properties classified within both continuing and discontinued operations, at June 30, 2016 and 2015, respectively:

26

	Total Square Feet (in thousands)		Percent of Total Square Feet				Percent Leased*				Average Annual Net Effective Rent**
Type	2016	2015	2016		2015		2016		2015		2016	2015
Industrial	110,863	106,322	92.7	%	90.7	%	96.7	%	96.9	%	$4.08	$4.01
Medical Office	5,503	5,172	4.6	%	4.4	%	95.7	%	94.6	%	$23.63	$23.09
Non-reportable Rental Operations	3,290	5,697	2.7	%	4.9	%	86.0	%	86.6	%	$13.80	$12.33
Total Consolidated	119,656	117,191	100.0	%	100.0	%	96.4	%	96.3	%	$5.21	$5.20
Unconsolidated Joint Ventures	13,956	19,893					89.2	%	91.9	%	$5.71	$5.86
Total Including Unconsolidated Joint Ventures	133,612	137,084					95.6	%	95.6	%	$5.56	$5.24
* Represents the percentage of total square feet leased based on executed leases and without regard to whether the leases have commenced.
**Represents average annual base rental payments per leased square foot, on a straight-line basis for the term of each lease, from space leased to tenants at the end of the most recent reporting period. This amount excludes additional amounts paid by tenants as reimbursement for operating expenses.

Vacancy Activity

The following table sets forth vacancy activity, shown in square feet, regarding our in-service rental properties, including properties classified within both continuing and discontinued operations, at June 30, 2016, (in thousands):

	Consolidated Properties		Unconsolidated Joint Venture Properties		Total Including Unconsolidated Joint Venture Properties
Vacant square feet at December 31, 2015	4,015		1,310		5,325
Vacant space in completed developments	2,337		228		2,565
Dispositions	(117	)	(2	)	(119	)
Expirations	2,922		334		3,256
Early lease terminations	146		2		148
Property structural changes/other	1		—		1
Leasing of previously vacant space	(4,947	)	(363	)	(5,310	)
Vacant square feet at June 30, 2016	4,357		1,509		5,866

Total Leasing Activity

The initial leasing of development projects or vacant space in acquired properties is referred to as first generation lease activity. The leasing of such space that we have previously held under lease is referred to as second generation lease activity. The total leasing activity for our rental properties, expressed in square feet of leases signed during the period, is as follows for the three and six months endedJune 30, 2016 and 2015, respectively (in thousands):

	Three Months Ended June 30,		Six Months Ended June 30,
	2016	2015	2016	2015
New Leasing Activity - First Generation	1,573	1,194	4,327	2,940
New Leasing Activity - Second Generation	2,261	1,266	3,367	2,180
Renewal Leasing Activity	2,522	1,046	5,548	4,628
Total Consolidated Leasing Activity	6,356	3,506	13,242	9,748
Unconsolidated Joint Venture Leasing Activity	1,241	573	1,743	1,470
Total Including Unconsolidated Joint Venture Leasing Activity	7,597	4,079	14,985	11,218

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New Second Generation Leases

The following table sets forth the estimated costs of tenant improvements and leasing commissions, on a per square foot basis, that we are obligated to fulfill under the new second generation leases signed for our rental properties during the three and six months endedJune 30, 2016 and 2015, respectively:

	Square Feet of New Second Generation Leases Signed (in thousands)		Average Term in Years		Estimated Tenant Improvement Cost per Square Foot		Leasing Commissions per Square Foot
	2016	2015	2016	2015	2016	2015	2016	2015
Three Months
Industrial	2,246	1,168	7.0	4.1	$2.10	$4.28	$1.77	$2.08
Medical Office	1	28	5.0	7.0	$10.00	$1.70	$7.96	$4.25
Non-reportable Rental Operations	14	70	4.6	7.1	$8.23	$15.72	$6.47	$6.53
Total Consolidated	2,261	1,266	7.0	4.3	$2.15	$4.85	$1.80	$2.38
Unconsolidated Joint Ventures	275	145	8.6	7.4	$6.44	$3.14	$3.02	$1.91
Total Including Unconsolidated Joint Ventures	2,536	1,411	7.1	4.7	$2.61	$4.68	$1.93	$2.33
Six Months
Industrial	3,320	1,966	6.9	5.1	$2.46	$3.59	$1.79	$1.90
Medical Office	7	39	6.7	6.5	$13.31	$5.43	$14.48	$5.18
Non-reportable Rental Operations	40	175	7.1	6.0	$10.57	$13.21	$10.12	$6.30
Total Consolidated	3,367	2,180	6.9	5.2	$2.58	$4.40	$1.91	$2.31
Unconsolidated Joint Ventures	346	314	7.4	5.7	$5.15	$6.00	$2.64	$4.82
Total Including Unconsolidated Joint Ventures	3,713	2,494	7.0	5.2	$2.82	$4.60	$1.98	$2.63

Lease Renewals

The following table summarizes our lease renewal activity within our rental properties for the three and six months endedJune 30, 2016 and 2015, respectively:

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	Square Feet of Leases Renewed (in thousands)		Percent of Expiring Leases Renewed				Average Term in Years		Growth (Decline) in Net Effective Rents*				Estimated Tenant Improvement Cost per Square Foot		Leasing Commissions per Square Foot
	2016	2015	2016		2015		2016	2015	2016		2015		2016	2015	2016	2015
Three Months
Industrial	2,110	959	49.6	%	66.4	%	3.8	4.2	15.0	%	20.0	%	$0.52	$0.55	$0.84	$1.20
Medical Office	34	5	86.8	%	33.9	%	7.6	3.5	12.8	%	13.0	%	$12.65	$3.62	$4.12	$1.69
Non-reportable Rental Operations	378	82	99.1	%	64.8	%	10.9	3.2	1.5	%	7.9	%	$2.02	$5.75	$1.65	$2.25
Total Consolidated	2,522	1,046	54.0	%	65.9	%	4.9	4.1	9.7	%	17.7	%	$0.91	$0.98	$1.00	$1.29
Unconsolidated Joint Ventures	949	174	99.6	%	81.7	%	5.1	3.9	(3.3	)%	1.3	%	$0.29	$1.61	$2.28	$1.51
Total Including Unconsolidated Joint Ventures	3,471	1,220	61.7	%	67.8	%	5.0	4.1	5.4	%	14.2	%	$0.74	$1.07	$1.35	$1.32
Six Months
Industrial	5,082	4,439	69.2	%	75.5	%	3.4	6.7	14.4	%	12.4	%	$0.42	$1.57	$0.71	$1.39
Medical Office	68	27	84.7	%	55.1	%	6.4	3.7	15.6	%	7.7	%	$9.09	$3.98	$3.57	$1.68
Non-reportable Rental Operations	398	162	77.7	%	58.9	%	10.7	4.3	2.1	%	8.1	%	$2.59	$5.77	$2.02	$3.60
Total Consolidated	5,548	4,628	70.0	%	74.6	%	3.9	6.6	11.7	%	11.8	%	$0.68	$1.73	$0.83	$1.47
Unconsolidated Joint Ventures	1,268	451	81.4	%	85.9	%	5.2	2.7	(2.7	)%	(0.2	)%	$0.50	$0.83	$2.09	$0.93
Total Including Unconsolidated Joint Ventures	6,816	5,079	71.8	%	75.5	%	4.2	6.2	8.0	%	10.4	%	$0.65	$1.65	$1.07	$1.42
* Represents the percentage change in net effective rent between the original leases and the renewal leases. Net effective rents represent average annual base rental payments, on a straight-line basis for the term of each lease, excluding operating expense reimbursements.

Lease Expirations

Our ability to maintain and improve occupancy rates and net effective rents primarily depends upon our continuing ability to re-lease expiring space. The table below reflects our consolidated in-service portfolio lease expiration schedule, excluding the leases in properties designated as held-for-sale, at June 30, 2016 (in thousands, except percentage data and number of leases):

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	Total Consolidated Portfolio					Industrial				Medical Office				Non-reportable
Year of Expiration	Square Feet		Ann. Rent Revenue*		Number of Leases	Square Feet		Ann. Rent Revenue*		Square Feet		Ann. Rent Revenue*		Square Feet		Ann. Rent Revenue*
Remainder of 2016	3,400		$	14,110	137	3,147		$	10,789	62		$	985	191		$	2,336
2017	12,237		49,178		179	11,882		43,410		191		3,899		164		1,869
2018	12,790		59,287		201	12,120		46,199		391		9,805		279		3,283
2019	14,302		67,414		205	13,470		52,346		312		7,410		520		7,658
2020	12,489		64,882		176	11,945		54,720		423		8,827		121		1,335
2021	11,721		55,289		163	11,250		46,943		250		5,581		221		2,765
2022	10,644		44,197		94	10,232		36,041		334		7,033		78		1,123
2023	3,584		26,176		62	2,944		15,077		418		7,787		222		3,312
2024	7,377		38,757		47	6,809		29,899		126		2,626		442		6,232
2025	8,026		36,925		45	7,682		31,308		212		3,877		132		1,740
2026 and Thereafter	18,643		144,324		96	15,639		70,350		2,546		66,596		458		7,378
Total Leased	115,213		$	600,539	1,405	107,120		$	437,082	5,265		$	124,426	2,828		$	39,031
Total Portfolio Square Feet	119,569					110,776				5,503				3,290
Percent Leased	96.4	%				96.7	%			95.7	%			86.0	%
* Annualized rental revenue represents average annual base rental payments, on a straight-line basis for the term of each lease, from space leased to tenants at the end of the most recent reporting period. Annualized rental revenue excludes additional amounts paid by tenants as reimbursement for operating expenses.

Information on current market rents can be difficult to obtain, is highly subjective, and is often not directly comparable between properties. As a result, we believe the increase or decrease in net effective rent on lease renewals, as previously defined, is the most objective and meaningful relationship between rents on leases expiring in the near-term and current market rents.

Building Acquisitions

Our decision process in determining whether or not to acquire a target property or portfolio of properties involves several factors, including expected rent growth, multiple yield metrics, property locations and expected demographic growth in each location, current occupancy of the target properties, tenant profile and remaining terms of the in-place leases in the target properties. We pursue both brokered and non-brokered acquisitions, and it is difficult to predict which markets and product types may present acquisition opportunities that align with our strategy. Because of the numerous factors considered in our acquisition decisions, we do not establish specific target yields for future acquisitions.

We acquired two buildings during the six months endedJune 30, 2016 and two buildings during the year ended December 31, 2015. The following table summarizes the acquisition price, percent leased at time of acquisition and in-place yields, by product type, for these acquisitions (in thousands, except percentage data):

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	Year-to-Date 2016 Acquisitions						Full Year 2015 Acquisitions
Type	Acquisition Price*		In-Place Yield**		Percent Leased at Acquisition Date***		Acquisition Price*		In-Place Yield**		Percent Leased at Acquisition Date***
Industrial	$	63,000	6.5	%	100.0	%	$	28,277	6.0	%	100.0	%
Medical Office	16,251		7.0	%	100.0	%	—		—	%	—	%
Total	$	79,251	6.6	%	100.0	%	$	28,277	6.0	%	100.0	%
* Includes real estate assets and net acquired lease-related intangible assets, including above or below market leases, but excludes other acquired working capital assets and liabilities.
** In-place yields of completed acquisitions are calculated as the current annualized net rental payments from space leased to tenants at the date of acquisition, divided by the acquisition price of the acquired real estate. Annualized net rental payments are comprised of base rental payments, excluding additional amounts payable by tenants as reimbursement for operating expenses, less current annualized operating expenses not recovered through tenant reimbursements.
*** Represents percentage of total square feet leased based on executed leases and without regard to whether the leases have commenced, at the date of acquisition.

As described in Note 5 to the consolidated financial statements, a $63.0 million property was acquired during the six months endedJune 30, 2016 through a non-monetary distribution of its ownership interest, from an unconsolidated joint venture, in connection with that joint venture's dissolution.

Building Dispositions

We regularly work to identify, consider and pursue opportunities to dispose of properties on an opportunistic basis and on a basis that is generally consistent with our strategic plans.

We soldnine wholly-owned buildings during the six months ended June 30, 2016 and 153 wholly-owned buildings during the year ended December 31, 2015. The following table summarizes the sales prices, in-place yields and percent leased, by product type, of these buildings (in thousands, except percentage data):

	Year-to-Date 2016 Dispositions						Full Year 2015 Dispositions
Type	Sales Price		In-Place Yield*		Percent Occupied**		Sales Price		In-Place Yield*		Percent Occupied**
Industrial	$	120,771	6.3	%	97.0	%	$	410,647	6.6	%	93.5	%
Medical Office	—		—	%	—	%	20,400		6.8	%	100.0	%
Non-reportable Rental Operations	55,725		5.9	%	78.7	%	1,310,538		7.2	%	85.5	%
Other	—		—	%	—	%	40,250		9.0	%	83.4	%
Total	$	176,496	6.2	%	94.4	%	$	1,781,835	7.1	%	88.7	%
*   In-place yields of completed dispositions are calculated as current annualized net rental payments from space leased to tenants at the date of sale, divided by the sales price of the real estate. Annualized net rental payments are comprised of base rental payments, excluding additional amounts payable by tenants as reimbursement for operating expenses, less current annualized operating expenses not recovered through tenant reimbursements.
** Represents percentage of total square feet leased based on executed leases where the leases have commenced.

Development

At June 30, 2016, we had 6.0 million square feet of property under development with total estimated costs upon completion of $553.9 million compared to 6.7 million square feet with total estimated costs upon completion of $604.1 million at June 30, 2015. The square footage and estimated costs include both consolidated properties and unconsolidated joint venture development activity at 100%.

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The following table summarizes our properties under development at June 30, 2016 (in thousands, except percentage data): 

Ownership Type	Square Feet	Percent Leased	Total Estimated Project Costs		Total Incurred to Date		Amount Remaining to be Spent
Consolidated properties	4,738	67%	$	453,143	$	208,238	$	244,905
Unconsolidated joint venture properties	1,259	90%	100,783		72,385		28,398
Total	5,997	72%	$	553,926	$	280,623	$	273,303

Results of Operations

A summary of our operating results and property statistics for the three and six months endedJune 30, 2016 and 2015, respectively, is as follows (in thousands, except number of properties and per share or Common Unit data):

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Rental and related revenue from continuing operations	$	200,520	$	201,996	$	402,323	$	416,611
General contractor and service fee revenue	26,044		23,901		49,195		76,722
Operating income	148,766		181,266		227,924		269,466
General Partner
Net income attributable to common shareholders	$	109,067	$	449,380	$	152,374	$	514,624
Weighted average common shares outstanding	347,464		345,098		346,564		344,849
Weighted average common shares and potential dilutive securities	354,433		349,161		352,227		348,945
Partnership
Net income attributable to common unitholders	$	110,168	$	454,142	$	153,913	$	520,085
Weighted average Common Units outstanding	350,968		348,728		350,065		348,511
Weighted average Common Units and potential dilutive securities	354,433		349,161		352,227		348,945
General Partner and Partnership
Basic income per common share or Common Unit:
Continuing operations	$	0.31	$	0.16	$	0.44	$	0.27
Discontinued operations	$	—	$	1.14	$	—	$	1.22
Diluted income per common share or Common Unit:
Continuing operations	$	0.31	$	0.16	$	0.44	$	0.27
Discontinued operations	$	—	$	1.14	$	—	$	1.22
Number of in-service consolidated properties at end of period	497		505		497		505
In-service consolidated square footage at end of period	119,656		117,191		119,656		117,191
Number of in-service joint venture properties at end of period	59		78		59		78
In-service joint venture square footage at end of period	13,956		19,893		13,956		19,893

Supplemental Performance Measures

In addition to net income (loss) computed in accordance with GAAP, we assess and measure the overall operating results of the General Partner and the Partnership using certain non-GAAP supplemental performance measures, which include (i) Funds From Operations ("FFO"), (ii) PNOI and (iii) Same Property Net Operating Income - Cash Basis ("SPNOI").

These non-GAAP metrics are commonly used by industry analysts and investors as supplemental operating performance measures of REITs and are viewed by management to be useful indicators of operating performance. Historical cost accounting for real estate assets in accordance with GAAP implicitly assumes that the value of real estate assets diminishes predictably over time. Since real estate values instead have historically risen or fallen with market conditions, many industry analysts and investors have considered presentation of operating results for real estate companies that use historical cost accounting to be insufficient by themselves. Management believes that the

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use of FFO, PNOI and SPNOI, combined with net income (which remains the primary measure of performance), improves the understanding of operating results of REITs among the investing public and makes comparisons of REIT operating results more meaningful.

The most comparable GAAP measure to FFO is net income (loss) attributable to common shareholders or common unitholders, while the most comparable GAAP measure to PNOI and SPNOI is income from continuing operations before income taxes.

FFO, PNOI and SPNOI each exclude expenses that materially impact our overall results of operations and, therefore, should not be considered as a substitute for net income (loss) attributable to common shareholders or common unitholders, income from continuing operations before income taxes, or any other measures derived in accordance with GAAP. Furthermore, these metrics may not be comparable to other similarly titled measures of other companies.

Funds From Operations

The National Association of Real Estate Investment Trusts ("NAREIT") created FFO as a non-GAAP supplemental measure of REIT operating performance. FFO, as defined by NAREIT, represents GAAP net income (loss), excluding extraordinary items as defined under GAAP, gains or losses from sales of previously depreciated real estate assets, impairment charges related to depreciable real estate assets, plus certain non-cash items such as real estate asset depreciation and amortization, and after similar adjustments for unconsolidated partnerships and joint ventures. We calculate FFO in accordance with the definition that was adopted by the Board of Governors of NAREIT.

Management believes that the use of FFO as a performance measure enables investors and analysts to readily identify the operating results of the long-term assets that form the core of a REIT's activity and assists them in comparing these operating results between periods or between different companies that use the NAREIT definition of FFO.

The following table shows a reconciliation of net income attributable to common shareholders or common unitholders to the calculation of FFO attributable to common shareholders or common unitholders for the three and six months endedJune 30, 2016 and 2015, respectively (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
Net income attributable to common shareholders of the General Partner	$	109,067		$	449,380		$	152,374		$	514,624
Add back: Net income attributable to noncontrolling interests - common limited partnership interests in the Partnership	1,101			4,762			1,539			5,461
Net income attributable to common unitholders of the Partnership	110,168			454,142			153,913			520,085
Adjustments:
Depreciation and amortization	80,161			78,334			157,959			163,754
Company share of joint venture depreciation, amortization and other adjustments	4,253			4,817			7,892			9,745
Gain on dissolution of unconsolidated company	(30,697		)	—			(30,697		)	—
Impairment charges - depreciable property	—			864			—			864
Gains on depreciable property sales—wholly owned	(39,566		)	(506,764		)	(55,057		)	(548,623		)
Income tax expense (benefit) triggered by depreciable property sales	(157		)	932			186			2,416
Gains on depreciable property sales—share of joint venture	(91		)	(11,989		)	(18,033		)	(13,533		)
Funds From Operations attributable to common unitholders of the Partnership	$	124,071		$	20,336		$	216,163		$	134,708
Additional General Partner Adjustments:
Net income attributable to noncontrolling interests - common limited partnership interests in the Partnership	(1,101		)	(4,762		)	(1,539		)	(5,461		)
Noncontrolling interest share of adjustments	(139		)	4,515			(623		)	4,050
Funds From Operations attributable to common shareholders of the General Partner	$	122,831		$	20,089		$	214,001		$	133,297

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The increase in FFO in 2016, compared to the three months and six months ended June 30, 2015, was primarily the result of $82.7 million in losses on debt extinguishment that were recognized during the second quarter of 2015. Operational improvements and lower interest expense also contributed to the increased FFO in 2016.

Property Level Net Operating Income - Cash Basis

PNOI is comprised of rental revenues from continuing operations less rental expenses and real estate taxes from continuing operations, along with certain other adjusting items that are detailed in the table below. As a performance metric that consists of only the cash-based revenues and expenses directly related to ongoing real estate rental operations, PNOI is narrower in scope than FFO.

PNOI, as we calculate it, may not be directly comparable to similarly titled, but differently calculated, measures for other REITs. We believe that PNOI is another useful supplemental performance measure, as it is an input in many REIT valuation models and it provides a means by which to evaluate the performance of the properties within our Rental Operations segments.

The major factors influencing PNOI are occupancy levels, acquisitions and sales, development properties that achieve stabilized operations, rental rate increases or decreases, and the recoverability of operating expenses. PNOI was calculated as follows for the three and six months endedJune 30, 2016 and 2015 (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
Rental and related revenue from continuing operations - Rental Operations segments	$	196,883		$	199,452		$	396,984		$	412,243
Rental and real estate tax expenses from continuing operations - Rental Operations segments	(52,120		)	(55,440		)	(108,921		)	(120,117		)
Less adjusting items, continuing operations:
Straight-line rental income and expense, net	(2,893		)	(3,956		)	(5,824		)	(11,107		)
Revenues related to lease buyouts	(69		)	(94		)	(234		)	(958		)
Amortization of lease concessions and above and below market rents	425			490			1,058			2,203
Intercompany rents and other adjusting items	226			412			219			872
PNOI, Continuing Operations	$	142,452		$	140,864		$	283,282		$	283,136

A reconciliation of PNOI for our Rental Operations segments to income (loss) from continuing operations before income taxes is provided in Note 10 to the consolidated financial statements included in Part I, Item 1 of this Report.

Same Property Net Operating Income - Cash Basis

We also evaluate the performance of our properties, including our share of properties we jointly control, on a "same property" basis, using a metric referred to as SPNOI. We view SPNOI as a useful supplemental performance measure because it improves comparability between periods by eliminating the effects of changes in the composition of our portfolio.

On an individual property basis, SPNOI is generally computed in a consistent manner as PNOI.

We have defined our same property portfolio, for the three months ended June 30, 2016, as those properties that have been owned and in operation throughout the twenty-four months ended June 30, 2016. In addition to excluding properties that have not been owned and in operation for the twenty-four months ended June 30, 2016, we have also excluded properties from our same property portfolio where revenues from individual lease buyouts in excess of $250,000 have been recognized. A reconciliation of SPNOI to income from continuing operations before income taxes is presented as follows (in thousands):

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	Three Months Ended June 30,						Percent
	2016			2015			Change
SPNOI	$	117,436		$	113,518		3.5%
Less share of SPNOI from unconsolidated joint ventures	(5,485		)	(5,324		)
PNOI excluded from the same property population	29,872			24,125
Earnings from Service Operations	3,816			2,163
Rental Operations revenues and expenses excluded from PNOI	2,940			11,693
Non-Segment Items	(38,932		)	(90,468		)
Income from continuing operations before income taxes	$	109,647		$	55,707

The composition of the line items titled "Rental Operations revenues and expenses excluded from PNOI" and "Non-Segment Items" from the table above are shown in greater detail in Note 10 to the consolidated financial statements included in Part I, Item 1 of this Report.

We believe that the factors that impact SPNOI are generally the same as those that impact PNOI. The following table details the number of properties, square feet, average occupancy and cash rental rates for the properties included in SPNOI for the respective periods:

	Three Months Ended June 30,
	2016	2015
Number of properties	455	455
Square feet (in thousands) (1)	101,920	101,920
Average commencement occupancy percentage (2)	97.4%	96.9%
Average rental rate - cash basis (3)	$4.81	$4.80
(1) Includes the total square feet of the consolidated properties that are in the same property population as well as 3.8 million square feet of space for unconsolidated joint ventures, which represents our ratable share of the 8.2 million total square feet of space for buildings owned by unconsolidated joint ventures that are in the same property population.
(2) Commencement occupancy represents the percentage of total square feet where the leases have commenced.
(3) Represents the average annualized contractual rent per square foot for the three-month periods ended June 30, 2016 and 2015 for tenants in occupancy in properties in the same property population. Cash rent does not include the tenant's obligation to pay property operating expenses and real estate taxes. If a tenant was within a free rent period at June 30, 2016 or 2015 its rent would equal zero for purposes of this metric.

Comparison of Three Months Ended June 30, 2016 to Three Months Ended June 30, 2015

Rental and Related Revenue

The following table sets forth rental and related revenue from continuing operations by reportable segment for the three months ended June 30, 2016 and 2015, respectively (in thousands):

	Three Months Ended June 30,
	2016		2015
Rental and related revenue:
Industrial	$	140,219	$	135,487
Medical Office	43,135		40,274
Non-reportable Rental Operations and non-segment revenues	17,166		26,235
Total rental and related revenue from continuing operations	$	200,520	$	201,996
Rental and Related Revenue from Discontinued Operations	126		49
Total Rental and Related Revenue from Continuing and Discontinued Operations	$	200,646	$	202,045

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The following factors contributed to the slight decrease in rental and related revenue from continuing operations:

• The sale of 100 properties since January 1, 2015, which did not meet the criteria to be classified within discontinued operations, resulted in a decrease of $13.4 million to rental and related revenue from continuing operations in the three months ended June 30, 2016, as compared to the same period in 2015.

• We acquired four properties and placed 38 developments in service from January 1, 2015 to June 30, 2016, which provided incremental revenues of $9.2 million in the second quarter of 2016, as compared to the same period in 2015, which partially offset the overall decrease in rental and related revenue from continuing operations.

• Increased occupancy and rental rates within our same-property portfolio also partially offset the impact of dispositions on rental and related revenue from continuing operations. Average commencement occupancy in our same-property portfolio increased by 0.5% from the three months ended June 30, 2015.

Rental Expenses and Real Estate Taxes

The following table sets forth rental expenses and real estate taxes from continuing operations by reportable segment for the three months ended June 30, 2016 and 2015, respectively (in thousands):

	Three Months Ended June 30,
	2016			2015
Rental expenses:
Industrial	$	10,392		$	12,458
Medical Office	8,122			8,068
Non-reportable Rental Operations and non-segment expenses	7,215			9,568
Total rental expenses from continuing operations	$	25,729		$	30,094
Rental Expenses from Discontinued Operations	(1		)	181
Total Rental Expenses from Continuing and Discontinued Operations	$	25,728		$	30,275
Real estate taxes:
Industrial	$	22,793		$	20,447
Medical Office	5,097			4,697
Non-reportable Rental Operations and non-segment expenses	2,058			2,603
Total real estate tax expense from continuing operations	$	29,948		$	27,747
Real Estate Tax Expense from Discontinued Operations	—			(168		)
Total Real Estate Tax Expense from Continuing and Discontinued Operations	$	29,948		$	27,579

Rental expenses from continuing operations decreased by $4.4 million in the three months ended June 30, 2016, compared to the same period in 2015. The decrease to rental expenses was primarily the result of property sales that did not meet the criteria to be classified within discontinued operations.

Real estate taxes from continuing operations increased by $2.2 million in the second quarter of 2016, compared to the same period in 2015. The increase to real estate tax expense was the result of acquisitions and developments placed in service from January 1, 2015 to June 30, 2016 and increases in real estate taxes on our existing base of properties, partially offset by a decrease resulting from property sales that did not meet the criteria to be classified within discontinued operations.

Service Operations

The following table sets forth the components of net earnings from the Service Operations reportable segment for the three months ended June 30, 2016 and 2015, respectively (in thousands):

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	Three Months Ended June 30,
	2016			2015
Service Operations:
General contractor and service fee revenue	$	26,044		$	23,901
General contractor and other services expenses	(22,228		)	(21,738		)
Net earnings from Service Operations	$	3,816		$	2,163

Service Operations primarily consist of the leasing, property management, asset management, development, construction management and general contractor services for joint venture properties and properties owned by third parties. Service Operations are heavily influenced by the current state of the economy, as leasing and property management fees are dependent upon occupancy, while construction and development services rely on the expansion of business operations of third-party property owners and joint venture partners. General contractor and service fee revenues, and net earnings from Service Operations, increased slightly during the three months ended June 30, 2016 due primarily to the favorable resolution of a warranty claim from a prior period's construction project.

Depreciation and Amortization

Depreciation and amortization expense from continuing operations increased from $78.3 million during the second quarter of 2015 to $80.2 million for the same period in 2016 primarily as the result of 38 developments placed in service since January 1, 2015. The impact of developments placed in service was partially offset by property dispositions that did not meet the criteria to be classified within discontinued operations.

Equity in Earnings

Equity in earnings represents our ownership share of net income or loss from investments in unconsolidated companies that generally own and operate rental properties. Equity in earnings decreased from $15.1 million for the three months ended June 30, 2015 to $3.5 million for the same period in 2016. During the three months ended June 30, 2015, two of our unconsolidated joint ventures sold properties for which we recorded $12.0 million to equity in earnings for our share of the net gains.

Gain on Dissolution of Unconsolidated Company and Promote Income

As described in Note 5 to the consolidated financial statements, we recognized a $30.7 milliongain and $24.1 million of promote income related to the dissolution of Duke/Hulfish during the three months ended June 30, 2016.

Gain on Sale of Properties - Continuing Operations

The $39.3 million recognized as gain on sale of properties in continuing operations for the three months ended June 30, 2016 is the result of the gain from the sale of six buildings. These properties did not meet the criteria for inclusion in discontinued operations.

The $107.4 million recognized as gain on sale of properties in continuing operations for the three months ended June 30, 2015 was comprised of the gain from the sale of a portfolio of 51 light industrial buildings located primarily in the Midwest that were sold on April 8, 2015. These properties did not meet the criteria for inclusion in discontinued operations.

Impairment Charges

We recognized impairment charges of $5.7 million on 78 acres of land compared to impairment charges of $4.6 million on 122 acres of land for the three months ended June 30, 2016 and June 30, 2015, respectively. These impairment charges were the result of changes in the intended use, or plans for sale, for certain of our investments in undeveloped land.

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As the result of changes in strategy, where we determined we would execute a sale within the relatively near future as opposed to holding for long-term investment, we also recognized impairment charges of $864,000 related to one building for the three months ended June 30, 2015.

General and Administrative Expenses

General and administrative expenses consist of two components. The first component includes general corporate expenses, and the second component includes the indirect operating costs not allocated to, or absorbed by, the development or Rental Operations of our wholly-owned properties or our Service Operations. The indirect operating costs that are either allocated to, or absorbed by, the development or Rental Operations of our wholly-owned properties, or our Service Operations, are primarily comprised of employee compensation, including related costs such as benefits and wage-related taxes, but also include other ancillary costs such as travel and information technology support. Total indirect operation costs, prior to any allocation or absorption, and general corporate expenses are collectively referred to as our overall pool of overhead costs.

Those indirect costs not allocated to or absorbed by these operations are charged to general and administrative expenses. We regularly review our total overhead cost structure relative to our leasing, development and construction volume and adjust the level of total overhead, generally through changes in our level of staffing in various functional departments, as necessary in order to control overall general and administrative expense.

General and administrative expenses decreased from $19.2 million for the second quarter of 2015 to $11.6 million for the same period in 2016. The following table sets forth the factors that led to the decrease in general and administrative expenses (in millions):

General and administrative expenses - three-month period ended June 30, 2015	$	19.2
Decrease to overall pool of overhead costs (1)	(9.0		)
Decreased absorption of costs by wholly owned leasing and development activities (2)	0.4
Decreased allocation of costs to Service Operations and Rental Operations	1.0
General and administrative expenses - three-month period ended June 30, 2016	$	11.6

(1) Our total pool of overhead costs decreased between periods, largely due to lower salary and related costs, as the result of workforce reductions executed primarily in connection with the significant decrease in our investment in office properties that occurred in connection with a $1.1 billion office portfolio sale that took place in early April 2015. The three month period ended June 30, 2015 included $7.2 million of overhead restructuring costs.

(2) We capitalized $6.0 million and $5.0 million of our total overhead costs to leasing and development, respectively, for consolidated properties during the three months ended June 30, 2016, compared to capitalizing $5.2 million and $6.1 million of such costs, respectively, for the three months ended June 30, 2015. Combined overhead costs capitalized to leasing and development totaled 32.1% and 26.3% of our overall pool of overhead costs for the three months ended June 30, 2016 and 2015, respectively.

Interest Expense

Interest expense allocable to continuing operations decreased from $43.0 million in the three months ended June 30, 2015 to $37.2 million in the three months ended June 30, 2016. The decrease to interest expense from continuing operations was primarily due to reducing total indebtedness by $1.26 billion since March 31, 2015.

We capitalized $3.8 million of interest costs in each of the three month periods ended June 30, 2016 and 2015.

Debt Extinguishment

During the three months ended June 30, 2016, we repurchased $72.0 million of our outstanding 5.95% senior unsecured notes, through a tender offer, prior to their maturity date in February 2017. This repurchase resulted in the loss on debt extinguishment of $2.4 million, which consisted of repurchase premiums and the write-off of unamortized deferred financing costs.

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During the three months ended June 30, 2015, we repurchased $431.2 million of our outstanding unsecured notes. These repurchases were executed primarily in connection with a tender offer that was completed in early April 2015. We also repaid certain secured loans prior to their scheduled maturity dates during the three months ended June 30, 2015. We recognized a total loss on debt extinguishment of $82.7 million from these transactions during the three months ended June 30, 2015, which included make-whole payments, repurchase premiums, prepayment premiums and the write-off of unamortized deferred financing costs.

Discontinued Operations

The property-specific components of earnings that are classified as discontinued operations include rental revenues, rental expenses, real estate taxes, allocated interest expense and depreciation expense, as well as the net gain or loss on the disposition of the properties. The financial results for 61 real estate properties, which were classified as held-for-sale at March 31, 2015 and sold on April 1, 2015, were included in discontinued operations and were classified as such subsequent to the adoption of ASU 2014-08. We sold one property during the three months ended March 31, 2015, which was classified as held-for-sale and included in discontinued operations prior to the adoption of ASU 2014-08.

The operations of 62 buildings were classified as discontinued operations for both the three months ended June 30, 2016 and June 30, 2015. These 62 buildings consist of 5 industrial, 56 office, and one medical office properties. As a result, we classified operating income, before gain on sales, of $127,000 and $36,000 in discontinued operations for the three months ended June 30, 2016 and 2015.

The gains on disposal of these properties are also reported in discontinued operations, as presented in Note 11 to the consolidated financial statements included in this Report.

Comparison of Six Months EndedJune 30, 2016 to Six Months EndedJune 30, 2015

Rental and Related Revenue

The following table sets forth rental and related revenue from continuing operations by reportable segment for the six months endedJune 30, 2016 and 2015, respectively (in thousands):

	Six Months Ended June 30,
	2016		2015
Rental and related revenue:
Industrial	$	283,199	$	283,115
Medical Office	85,360		80,302
Non-reportable Rental Operations and non-segment revenues	33,764		53,194
Total rental and related revenue from continuing operations	$	402,323	$	416,611
Rental and Related Revenue from Discontinued Operations	355		32,164
Total Rental and Related Revenue from Continuing and Discontinued Operations	$	402,678	$	448,775

The following factors contributed to the decrease in rental and related revenue from continuing operations:

• The sale of 100 properties, since January 1, 2015, which did not meet the criteria for inclusion within discontinued operations, resulted in a decrease of $35.7 million to rental and related revenue from continuing operations in the six months endedJune 30, 2016, as compared to the same period in 2015.

• We acquired four properties and placed 38 developments in service from January 1, 2015 to June 30, 2016, which provided incremental revenues of $15.4 million in the six months endedJune 30, 2016, as compared to the same period in 2015, which partially offset the overall decrease in rental and related revenue from continuing operations.

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• Increased occupancy and rental rates within our same property portfolio also partially offset the impact of dispositions on rental and related revenue from continuing operations.

Rental Expenses and Real Estate Taxes

The following table sets forth rental expenses and real estate taxes from continuing operations by reportable segment for the six months endedJune 30, 2016 and 2015, respectively (in thousands):

	Six Months Ended June 30,
	2016			2015
Rental expenses:
Industrial	$	24,754		$	29,787
Medical Office	16,517			16,241
Non-reportable Rental Operations and non-segment revenues	13,737			20,190
Total rental expenses from continuing operations	$	55,008		$	66,218
Rental Expenses from Discontinued Operations	(9		)	8,971
Total Rental Expenses from Continuing and Discontinued Operations	$	54,999		$	75,189
Real estate taxes:
Industrial	$	45,501		$	43,259
Medical Office	10,057			9,195
Non-reportable Rental Operations and non-segment revenues	4,017			6,072
Total real estate tax expense from continuing operations	$	59,575		$	58,526
Real Estate Tax Expense from Discontinued Operations	—			3,428
Total Real Estate Tax Expense from Continuing and Discontinued Operations	$	59,575		$	61,954

Overall, rental expenses from continuing operations decreased by $11.2 million in the six months endedJune 30, 2016, compared to the same period in 2015. The decrease to rental expenses from continuing operations was primarily the result of property sales that did not meet the criteria to be classified within discontinued operations, partially offset by incremental expenses related to acquisitions and developments placed in service.

Overall, real estate taxes from continuing operations increased by $1.0 million in the six months endedJune 30, 2016, compared to the same period in 2015. The increase to real estate taxes from continuing operations was caused by the net effect of 38 developments placed in service from January 1, 2015 to June 30, 2016, and by increased real estate taxes for our existing base of properties, partially offset by a decrease resulting from property sales that did not meet the criteria to be classified within discontinued operations.

Service Operations

The following table sets forth the components of net earnings from the Service Operations reportable segment for the six months endedJune 30, 2016 and 2015, respectively (in thousands):

	Six Months Ended June 30,
	2016			2015
Service Operations:
General contractor and service fee revenue	$	49,195		$	76,722
General contractor and other services expenses	(43,148		)	(68,762		)
Net earnings from Service Operations	$	6,047		$	7,960

General contractor and service fee revenues, and net earnings from Service Operations, decreased during the six months endedJune 30, 2016 due to less overall third party construction activity as we continue to focus our resources on wholly owned development projects.

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Depreciation and Amortization

Depreciation and amortization expense decreased from $160.2 million during the first six months of 2015 to $158.0 million for the same period in 2016, primarily as the result of asset dispositions since January 1, 2015 that were not classified within discontinued operations. The impact of asset dispositions was partially offset by new develpments being placed in service.

Equity in Earnings

Equity in earnings increased from $21.4 million in the first six months of 2015 to $25.4 million for the same period in 2016. During the six months ended June 30, 2016, we recorded $18.0 million to equity in earnings related to our share of the gains on sale of joint venture properties or for sales of our interests in unconsolidated joint ventures. During the six months ended June 30, 2015, three of our unconsolidated joint ventures sold properties for which we recorded $13.5 million to equity in earnings for our share of the net gains.

Gain on Dissolution of Unconsolidated Company and Promote Income

As described in Note 5 to the consolidated financial statements, we recognized a $30.7 milliongain and $24.1 million of promote income related to the dissolution of Duke/Hulfish during the six months ended June 30, 2016.

Gain on Sale of Properties - Continuing Operations

The $54.9 million recognized as gain on sale of properties in continuing operations for the six months endedJune 30, 2016 is comprised primarily of the gains from the sale of nine properties. These properties did not meet the criteria for inclusion in discontinued operations.

The $130.9 million recognized as gain on sale of properties in continuing operations for the six months ended June 30, 2015 is primarily comprised of the gains from the sale of a retail property in Eastern Pennsylvania, four industrial properties in Minneapolis, MN, six office properties in Cleveland, OH and a portfolio of 51 light industrial buildings located primarily in the Midwest. These properties did not meet the criteria for inclusion in discontinued operations.

Impairment Charges

We recognized impairment charges of $12.1 million on 174 acres of land compared to impairment charges of $4.6 million on 122 acres of land for the six months endedJune 30, 2016 and June 30, 2015, respectively. These impairment charges were the result of changes in the intended use, or plans for sale, for certain of our investments in undeveloped land.

As the result of changes in strategy, where we determined we would execute a sale within the relatively near future as opposed to holding for long-term investment, we also recognized impairment charges of $864,000 related to one building for the six months endedJune 30, 2015.

General and Administrative Expense

General and administrative expenses decreased from $36.2 million for the first six months of 2015 to $29.7 million for the same period in 2016. The following table sets forth the factors that led to the decrease in general and administrative expenses from the six months endedJune 30, 2015 to the six months endedJune 30, 2016 (in millions):

General and administrative expenses - six months ended June 30, 2015	$	36.2
Decrease to overall pool of overhead costs (1)	(11.5		)
Increased absorption of costs by wholly owned leasing and development activities (2)	(0.2		)
Decreased allocation of costs to Service Operations and Rental Operations (3)	5.2
General and administrative expenses - six months ended June 30, 2016	$	29.7

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(1) Our total pool of overhead costs decreased between periods, largely due to lower salary and related costs, as the result of workforce reductions executed primarily in connection with the significant decrease in our investment in office properties that occurred in connection with a $1.1 billion office portfolio sale that took place in early April 2015. The six month period ended June 30, 2015 included $7.2 million of overhead restructuring costs.

(2) We capitalized $12.8 million and $11.3 million of our total overhead costs to leasing and development, respectively, for consolidated properties during the six months ended June 30, 2016, compared to capitalizing $14.2 million and $9.7 million of such costs, respectively, for the six months ended June 30, 2015. Combined overhead costs capitalized to leasing and development totaled 31.7% and 27.3% of our overall pool of overhead costs for the six months endedJune 30,2016 and 2015, respectively.

(3) The decrease in allocation of costs to Service Operations and Rental Operations resulted from a lower volume of third-party construction projects during the six months ended June 30, 2016 as well as a lower allocation of property management and maintenance expenses to Rental Operations due to significantly decreasing our investment in office properties in early April 2015.

Interest Expense

Interest expense allocable to continuing operations decreased from $92.6 million in the first six months of 2015 to $74.9 million in the first six months of 2016. The decrease to interest expense from continuing operations was primarily due to reducing total indebtedness by $1.23 billion since December 31, 2014.

We capitalized $9.5 million of interest costs during the six months ended June 30, 2016 compared to $6.9 million during the six months ended June 30, 2015.

Debt Extinguishment

During the six months ended June 30, 2016, we repurchased $72.0 million of our outstanding 5.95% senior unsecured notes, through a tender offer, prior to their maturity date in February 2017. This repurchase resulted in the loss on debt extinguishment of $2.4 million, which consisted of repurchase premiums and the write-off of unamortized deferred financing costs.

During the six months ended June 30, 2015, we repurchased $431.2 million of our outstanding unsecured notes. These repurchases were primarily the result of a tender offer that was completed in early April 2015. We also repaid certain secured loans prior to their scheduled maturity dates during the six months ended June 30, 2015. We recognized a total loss on debt extinguishment of $82.7 million from these transactions during the six months ended June 30, 2015, which included make-whole payments, repurchase premiums, prepayment premiums as well as the write-off of unamortized deferred financing costs.

Discontinued Operations

The operations of 62 buildings were classified as discontinued operations for both the six months ended June 30, 2016 and June 30, 2015. These 62 buildings consist of 5 industrial, 56 office and one medical office properties. As a result, we classified operating income, before gain on sales, of $364,000 and $10.2 million in discontinued operations for the six months ended June 30, 2016 and 2015, respectively.

Of the properties included in discontinued operations, none were sold during the first six months of 2016 and 62 were sold during the first six months of 2015 (61 of the properties sold during 2015 were classified within discontinued operations subsequent to the April 1, 2014 adoption of ASU 2014-08). The gains on disposal of these properties, and related income tax impact, are also reported in discontinued operations, as presented in Note 11 to the consolidated financial statements.

Liquidity and Capital Resources

Sources of Liquidity

We expect to meet our short-term liquidity requirements over the next 12 months primarily through working capital, net cash provided by operating activities and proceeds received from real estate dispositions. Our short-term liquidity requirements include payments of dividends and distributions as well as the capital expenditures needed to maintain our current real estate assets. During the three months ended June 30, 2016, we also received full repayment of the $200.0 million seller-financed mortgage form the buyers of an office portfolio that we sold in

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April 2015. We had no balance outstanding on the Partnership's $1.2 billion unsecured line of credit at June 30, 2016.

In addition to our existing sources of liquidity, we expect to meet long-term liquidity requirements, such as scheduled mortgage and unsecured debt maturities, property acquisitions, financing of development activities and other capital improvements, through multiple sources of capital including operating cash flow, proceeds from property dispositions, term loans and through accessing the public debt and equity markets.

Rental Operations

Cash flows from Rental Operations is our primary source of liquidity and provides a stable source of cash flow to fund operational expenses. We believe that this cash-based revenue stream is substantially aligned with revenue recognition (except for items such as periodic straight-line rental income accruals and amortization of above or below market rents) as cash receipts from the leasing of rental properties are generally received in advance of, or a short time following, the actual revenue recognition.

Our industry is subject to a number of risks related to general economic conditions, including reduced occupancy, tenant defaults and bankruptcies and potential reduction in rental rates upon renewal or re-letting of properties, any of which would result in reduced cash flow from operations.

Unsecured Debt and Equity Securities

We use the Partnership's unsecured line of credit (which is guaranteed by the General Partner) as a temporary source of capital to fund development activities, acquire additional rental properties and provide working capital.

At June 30, 2016, we had on file with the SEC an automatic shelf registration statement on Form S-3 relating to the offer and sale, from time to time, of an indeterminate amount of debt and equity securities. Equity securities are offered and sold by the General Partner, and the net proceeds of such offerings are contributed to the Partnership in exchange for additional General Partner Units or Preferred Units. From time to time, we expect to issue additional securities under this automatic shelf registration statement to fund the repayment of long-term debt upon maturity and for other general corporate purposes.

The General Partner currently has an at the market equity program that allows it to issue new common shares from time to time, with an aggregate offering price of up to $175.0 million. During the six months endedJune 30, 2016, the General Partner issued 4.2 million common shares pursuant to its at the market equity program, generating gross proceeds of approximately $99.6 million and, after deducting commissions and other costs, net proceeds of approximately $98.5 million. At June 30, 2016, the General Partner had a capacity of $26.7 million remaining under its current at the market equity program.

In June 2016, we issued $375.0 million of 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 notes due February 2017, for a cash payment of $74.5 million.

The Partnership has issued debt securities pursuant to certain indentures and related supplemental indentures, which also require us to comply with financial ratios and other covenants regarding our operations. We were in compliance with all such covenants, as well as applicable covenants under our unsecured line of credit, at June 30, 2016.

Sale of Real Estate Assets

We regularly work to identify, consider and pursue opportunities to dispose of non-strategic properties on an opportunistic basis and on a basis that is generally consistent with our strategic plans. Our ability to dispose of such properties on favorable terms, or at all, is dependent upon a number of factors including the availability of credit to

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potential buyers to purchase properties at prices that we consider acceptable. Although we believe that we have demonstrated our ability to generate significant liquidity through the disposition of non-strategic properties, potential future adverse changes to general market and economic conditions could negatively impact our further ability to dispose of such properties.

We generated cash from proceeds from the sale of land and depreciable property totaling $174.9 million during the six months ended June 30, 2016.

Transactions with Unconsolidated Joint Ventures

Transactions with unconsolidated joint ventures also provide a source of liquidity. From time to time we will sell properties to unconsolidated joint ventures, while retaining a continuing interest in that entity, and receive proceeds commensurate to those interests that we do not own. Additionally, unconsolidated joint ventures will from time to time obtain debt financing or sell properties and will then distribute to us, and our joint venture partners, all or a portion of the proceeds from such transactions. During the six months ended June 30, 2016, our share of sale and debt financing distributions from unconsolidated joint ventures totaled $36.3 million. We also received $36.6 million in late July 2016 for our share of disposition proceeds and promote income related to the sale of the final property from Duke/Hulfish.

Uses of Liquidity

Our principal uses of liquidity include the following:

• property investment;

• leasing/capital costs;

• dividends and distributions to shareholders and unitholders;

• long-term debt maturities;

• opportunistic repurchases of outstanding debt; and

• other contractual obligations.

Property Investment

We continue to pursue an asset repositioning strategy that involves increasing our investment concentration in industrial properties while continuing to dispose of our suburban office properties. Pursuant to this strategy, we evaluate development and acquisition opportunities based upon our market outlook, including general economic conditions, supply and long-term growth potential. Our ability to make future property investments is dependent upon identifying suitable acquisition and development opportunities, and our continued access to our longer-term sources of liquidity, including issuances of debt or equity securities as well as generating cash flow by disposing of selected properties.

Leasing/Capital Costs

Tenant improvements and lease-related costs pertaining to our initial leasing of newly completed space, or vacant space in acquired properties, are referred to as first generation expenditures. Such first generation expenditures for tenant improvements are included within "development of real estate investments" in our Consolidated Statements of Cash Flows, while such expenditures for lease-related costs are included within "other deferred leasing costs."

Cash expenditures related to the construction of a building's shell, as well as the associated site improvements, are also included within "development of real estate investments" in our Consolidated Statements of Cash Flows.

Tenant improvements and leasing costs to re-let rental space that we previously leased to tenants are referred to as second generation expenditures. Building improvements that are not specific to any tenant but serve to improve integral components of our real estate properties are also second generation expenditures. One of the principal uses of our liquidity is to fund the second generation leasing/capital expenditures of our real estate investments.

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The following table summarizes our second generation capital expenditures by type of expenditure, as well as capital expenditures for the development of real estate investments and for other deferred leasing costs (in thousands):

	Six Months Ended June 30,
	2016		2015
Second generation tenant improvements	$	14,445	$	14,697
Second generation leasing costs	14,711		13,984
Building improvements	1,081		2,190
Total second generation capital expenditures	$	30,237	$	30,871
Development of real estate investments	$	213,262	$	109,617
Other deferred leasing costs	$	14,993	$	22,302

The increase in capital expenditures for the development of real estate investments, from $109.6 million in the six months ended June 30, 2015 to $213.3 million in the six months ended June 30, 2016, was due to the timing of wholly-owned development activities. At June 30, 2016, we had 6.0 million square feet of property under development with total estimated costs upon completion of $553.9 million, compared to 6.7 million square feet with total estimated costs upon completion of $604.1 million at June 30, 2015.

The capital expenditures in the table above include the capitalization of internal overhead costs. We capitalized $12.8 million and $14.2 million of overhead costs related to leasing activities, including both first and second generation leases, during the six months endedJune 30, 2016 and 2015, respectively. We capitalized $11.3 million and $9.7 million of overhead costs related to development activities, including both development and tenant improvement projects on first and second generation space, during the six months endedJune 30, 2016 and 2015, respectively. Combined overhead costs capitalized to leasing and development totaled 31.7% and 27.3% of our overall pool of overhead costs for the six months endedJune 30, 2016 and 2015, respectively. Further discussion of the capitalization of overhead costs can be found herein, in the discussion of general and administrative expenses in the Comparison of Six Months Ended June 30, 2016 to Six Months Ended June 30, 2015 section of Management's Discussion and Analysis of Financial Condition and Results of Operations as well as in the Critical Accounting Policies section of Management's Discussion and Analysis of Financial Condition and Results of Operations in our 2015 Annual Report.

In addition to the capitalization of overhead costs discussed above, we also capitalized $9.5 million and $6.9 million of interest costs in the six months endedJune 30, 2016 and 2015, respectively.

The following table summarizes our second generation capital expenditures by reportable operating segment (in thousands):

	Six Months Ended June 30,
	2016		2015
Industrial	$	25,594	$	20,905
Medical Office	884		632
Non-reportable Rental Operations	3,759		9,334
Total	$	30,237	$	30,871

Both our first and second generation expenditures vary significantly between leases on a per square foot basis, dependent upon several factors including the product type, the nature of a tenant's operations, the specific physical characteristics of each individual property and the market in which the property is located.

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Dividend and Distribution Requirements

The General Partner is required to meet the distribution requirements of the Code, in order to maintain its REIT status. We paid dividends or distributions of $0.18 per common share or Common Unit in the first and second quarters of 2016, and the General Partner's board of directors declared dividends or distributions of $0.18 per common share or Common Unit for the third quarter of 2016. Our future dividends or distributions will be declared at the discretion of the General Partner's board of directors and will be subject to our future capital needs and availability.

Debt Maturities

Debt outstanding at June 30, 2016 had a face value totaling $3.2 billion with a weighted average interest rate of 4.76% and maturities at various dates through 2028. Of this total amount, we had $2.8 billion of unsecured debt, $390.5 million of secured debt and no balance on our unsecured line of credit at June 30, 2016. Scheduled principal amortization, maturities and early repayments of such debt totaled $492.9 million for the six months ended June 30, 2016.

The following table is a summary of the scheduled future amortization and maturities of our indebtedness at June 30, 2016 (in thousands, except percentage data):

	Future Repayments
Year	Scheduled Amortization		Maturities		Total		Weighted Average Interest Rate of Future Repayments
Remainder of 2016	$	5,507	$	1,661	$	7,168	6.35	%
2017	9,260		268,987		278,247		5.93	%
2018	7,768		285,611		293,379		6.08	%
2019	6,936		397,976		404,912		7.85	%
2020	5,381		378,660		384,041		3.38	%
2021	3,416		259,047		262,463		3.99	%
2022	3,611		600,000		603,611		4.20	%
2023	3,817		250,000		253,817		3.75	%
2024	4,036		300,000		304,036		3.92	%
2025	3,938		—		3,938		5.48	%
2026	2,029		375,000		377,029		3.37	%
Thereafter	358		50,000		50,358		7.29	%
	$	56,057	$	3,166,942	$	3,222,999	4.76	%

We anticipate generating capital to fund our debt maturities by using undistributed cash generated from our Rental Operations and property dispositions and by raising additional capital from future debt or equity transactions.

Repurchases of Outstanding Debt

To the extent that it supports our overall capital strategy, we may purchase some of our outstanding unsecured notes prior to their stated maturities.

In June 2016, we repurchased unsecured notes with a face value of $72.0 million, for a cash payment of $74.5 million. These notes had a stated interest rate and an effective rate of 5.95%.

The remaining $203.0 million balance of our 5.95% notes due February 2017 were retired on July 23, 2016 for a cash payment of $209.0 million. This obligation is still reflected in the preceding schedule of debt maturities.

Historical Cash Flows

Cash and cash equivalents were $91.7 million and $20.3 million at June 30, 2016 and 2015, respectively. The following table highlights significant changes in net cash associated with our operating, investing and financing activities (in millions):

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	Six Months Ended June 30,
	2016			2015
General Partner
Net Cash Provided by Operating Activities	$	191.4		$	175.7
Net Cash Provided by Investing Activities	$	41.5		$	1,018.5
Net Cash Used for Financing Activities	$	(163.7	)	$	(1,191.9	)
Partnership
Net Cash Provided by Operating Activities	$	191.4		$	175.7
Net Cash Provided by Investing Activities	$	41.5		$	1,018.5
Net Cash Used for Financing Activities	$	(163.7	)	$	(1,191.9	)

Operating Activities

The receipt of rental income from Rental Operations continues to be our primary source of operating cash flows. The increase to cash flow provided by operating activities, compared to the six months ended June 30, 2015, was caused by lower cash paid for interest, as the result of the significant debt repayments that took place throughout 2015, newly developed properties being placed in service and improved operational performance.

Investing Activities

Investing activities are one of the primary uses of our liquidity. Development and acquisition activities typically generate additional rental revenues and provide cash flows for operational requirements. Highlights of significant cash sources and uses are as follows:

• During the six months ended June 30, 2016, we paid cash of approximately $16.0 million and $27.2 million, respectively, for real estate and undeveloped land acquisitions, compared to $20.9 million and $25.6 million, respectively, for real estate and undeveloped land acquisitions in the same period in 2015.

• Real estate development costs were $213.3 million during the six months ended June 30, 2016, compared to $109.6 million for the same period in 2015.

• Sales of land and depreciated property provided $174.9 million in net proceeds for the six months ended June 30, 2016, compared to $1.31 billion for the same period in 2015.

• Second generation tenant improvements, leasing costs and building improvements totaled $30.2 million for the six months ended June 30, 2016 compared to $30.9 million for the same period in 2015.

• For the six months ended June 30, 2016, we received $36.3 million in capital distributions from unconsolidated joint ventures, compared to $67.0 million during the same period in 2015.

Financing Activities

The following items highlight some of the factors that account for the difference in net cash flow related to financing activities in the first six months of 2016, compared to the same period in 2015:

• For the six months ended June 30, 2016, we repaid the $71.0 million of net borrowings on the Partnership's unsecured line of credit, compared to the repayment of $106.0 million of net borrowings for the same period in 2015.

• During the six months ended June 30, 2016, we repaid four secured loans for $344.7 million. We repaid fifteen secured loans, which included early repayment premiums of $4.2 million for six loans that were repaid prior to their scheduled maturity dates, for cash payments totaling $201.9 million during the same period in 2015.

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• During the six months ended June 30, 2016, the General Partner issued 4.2 million common shares pursuant to its at the market equity program, for net proceeds of approximately $98.5 million, compared to the issuance of 233,000 common shares for net proceeds of $4.8 million during the same period in 2015.

• In June 2016, the Partnership issued $375.0 million of unsecured notes that bear interest at a stated rate of 3.25%, have an effective rate of 3.36%, and mature on June 30, 2026. A portion of these proceeds was used to repurchase $72.0 million of our 5.95% notes due February 2017, for a cash payment of $74.5 million. During the six months ended June 30, 2015, the Partnership repaid a $250.0 million senior unsecured note at its maturity date. The Partnership also repurchased unsecured notes, primarily through the Tender Offer, for cash payments totaling $508.3 million, which included repurchase premiums, early repayment premiums and transaction costs of $77.1 million.

Contractual Obligations

Aside from repayments of long-term debt, there have not been material changes in our outstanding commitments since December 31, 2015, as previously discussed in our 2015 Annual Report.

Off Balance Sheet Arrangements - Investments in Unconsolidated Companies

We analyze our investments in unconsolidated joint ventures to determine if they meet the criteria for classification as a VIE and would require consolidation. We (i) evaluate the sufficiency of the total equity at risk, (ii) review the voting rights and decision-making authority of the equity investment holders as a group and whether there are any guaranteed returns, protection against losses, or capping of residual returns within the group and (iii) establish whether activities within the venture are on behalf of an investor with disproportionately few voting rights in making this VIE determination. To the extent that we (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 of the VIE and would consolidate it. At the end of each reporting period, we re-assess our conclusions as to which, if any, party within the VIE is considered the primary beneficiary. To the extent that our joint ventures do not qualify as VIEs, we further assess each joint venture partner's substantive participating rights to determine if the venture should be consolidated. There were no unconsolidated joint ventures that met the criteria to be a VIE at June 30, 2016.

We have equity interests in unconsolidated partnerships and limited liability companies that primarily own and operate rental properties and hold land for development. These unconsolidated joint ventures are primarily engaged in the operations and development of industrial, medical office and office real estate properties. These investments provide us with increased market share and tenant and property diversification. The equity method of accounting is used for these investments in which we have the ability to exercise significant influence, but not control, over operating and financial policies. As a result, the assets and liabilities of these entities are not included on our balance sheet. Our investments in and advances to unconsolidated subsidiaries represented approximately 4% of our total assets at both June 30, 2016 and December 31, 2015. Total assets of our unconsolidated subsidiaries were $1.0 billion and $1.4 billion at June 30, 2016 and December 31, 2015, respectively. The combined revenues of our unconsolidated subsidiaries totaled $70.8 million and $94.7 million for the six months ended June 30, 2016 and 2015, respectively.

We have guaranteed the repayment of certain secured and unsecured loans of our unconsolidated subsidiaries. The outstanding balances on the guaranteed portion of these loans totaled $75.5 million at June 30, 2016.

Item 3.    Quantitative and Qualitative Disclosures About Market Risk

We are exposed to interest rate changes primarily as a result of our line of credit and our long-term borrowings. Our interest rate risk management objective is to limit the impact of interest rate changes on earnings and cash flows and to lower overall borrowing costs. To achieve our objectives, we borrow primarily at fixed rates. We do not enter into derivative or interest rate transactions for speculative purposes. We have one outstanding swap, which fixes the rate on one of our variable rate loans and is not significant to our financial statements at June 30, 2016.

48

Our interest rate risk is monitored using a variety of techniques. The table below presents the principal amounts (in thousands) of the expected annual maturities, weighted average interest rates for the average debt outstanding in the specified period, fair values (in thousands) and other terms required to evaluate the expected cash flows and sensitivity to interest rate changes.

	Remainder of 2016			2017			2018			2019			2020			Thereafter			Face Value			Fair Value
Fixed rate secured debt	$	5,664		$	72,472		$	4,783		$	272,215		$	3,583		$	28,652		$	387,369		$	439,047
Weighted average interest rate	6.68		%	5.89		%	6.46		%	7.63		%	5.98		%	5.92		%	7.13		%
Variable rate secured debt	$	300		$	300		$	300		$	300		$	300		$	1,600		$	3,100		$	3,100
Weighted average interest rate	0.47		%	0.47		%	0.47		%	0.47		%	0.47		%	0.47		%	0.47		%
Fixed rate unsecured debt	$	1,204		$	205,475		$	288,296		$	132,397		$	130,158		$	1,825,000		$	2,582,530		$	2,756,924
Weighted average interest rate	6.26		%	5.95		%	6.08		%	8.33		%	6.74		%	3.96		%	4.72		%
Variable rate unsecured notes	$	—		$	—		$	—		$	—		$	250,000		$	—		$	250,000		$	250,000
Rate at June 30, 2016	N/A			N/A			N/A			N/A			1.60%			N/A			1.60		%

As the above table incorporates only those exposures that existed at June 30, 2016, it does not consider those exposures or positions that could arise after that date. As a result, the ultimate impact of interest rate fluctuations will depend on future exposures that arise, our hedging strategies at that time, to the extent we are party to interest rate derivatives, and interest rates. Interest expense on our unsecured line of credit, to the extent we have outstanding borrowings, and our variable rate unsecured notes will be affected by fluctuations in the LIBOR indices as well as changes in our credit rating. The interest rate at such point in the future as we may renew, extend or replace our unsecured line of credit will be heavily dependent upon the state of the credit environment.

Item 4.    Controls and Procedures

Controls and Procedures (General Partner)

(a) Evaluation of Disclosure Controls and Procedures

We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed by us in the reports that we file or submit under the Securities Exchange Act of 1934, as amended, is recorded, processed, summarized and reported within the time periods specified in the SEC's rules and forms. These disclosure controls and procedures are further designed to ensure that such information is accumulated and communicated to management, including the Chief Executive Officer and the Chief Financial Officer, to allow timely decisions regarding required disclosure.

We carried out an evaluation, under the supervision and with the participation of management, including our Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures pursuant to Exchange Act Rules 13a-15 and 15d-15. Based upon the foregoing, the Chief Executive Officer and the Chief Financial Officer concluded that, as of the end of the period covered by this Report, our disclosure controls and procedures were effective.

(b) Changes in Internal Control over Financial Reporting

There have been no changes in our internal control over financial reporting during the period covered by this Report that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

49

Controls and Procedures (Partnership)

(a) Evaluation of Disclosure Controls and Procedures

We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed by us in the reports that we file or submit under the Securities Exchange Act of 1934, as amended, is recorded, processed, summarized and reported within the time periods specified in the SEC's rules and forms. These disclosure controls and procedures are further designed to ensure that such information is accumulated and communicated to management, including the General Partner's Chief Executive Officer and Chief Financial Officer, to allow timely decisions regarding required disclosure.

We carried out an evaluation, under the supervision and with the participation of management, including the General Partner's Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures pursuant to Exchange Act Rules 13a-15 and 15d-15. Based upon the foregoing, the General Partner's Chief Executive Officer and Chief Financial Officer concluded that, as of the end of the period covered by this Report, our disclosure controls and procedures were effective.

(b) Changes in Internal Control over Financial Reporting

There have been no changes in our internal control over financial reporting during the period covered by this Report that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

50

Part II - Other Information

Item 1. Legal Proceedings

From time to time, we are parties to a variety of legal proceedings and claims arising in the ordinary course of our businesses. While these matters generally are covered by insurance, there is no assurance that our insurance will cover any particular proceeding or claim. We are not subject to any material pending legal proceedings other than routine litigation arising in the ordinary course of business. We presently believe that all of the proceedings to which we were subject as of June 30, 2016, taken as a whole, will not have a material adverse effect on our liquidity, business, financial condition or results of operations.

Item 1A. Risk Factors

In addition to the information set forth in this Report, you also should carefully review and consider the information contained in our other reports and periodic filings that we make with the SEC, including, without limitation the information contained under the caption "Item 1A. Risk Factors" in our 2015 Annual Report. The risks and uncertainties described in our 2015 Annual Report are not the only risks that we face. Additional risks and uncertainties not currently known to us, or that we presently deem to be immaterial, also may materially adversely affect our business, financial condition and results of operations.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

(a) Unregistered Sales of Equity Securities

None

(b) Use of Proceeds

None

(c) Issuer Purchases of Equity Securities

From time to time, we repurchase our securities under a repurchase program that initially was approved by the General Partner's board of directors and publicly announced in October 2001 (the "Repurchase Program").

On January 27, 2016 the General Partner's board of directors adopted a resolution that amended and restated the Repurchase Program and delegated authority to management to repurchase a maximum of $100.0 million of the General Partner's common shares, $500.0 million of the Partnership's debt securities and $500.0 million of the General Partner's preferred shares, subject to the prior notification of the Chairman of the Finance Committee of the board of directors of planned repurchases within these limits. We did not repurchase any equity securities through the Repurchase Program during the quarter ended June 30, 2016.

Item 3. Defaults upon Senior Securities

During the period covered by this Report, we did not default under the terms of any of our material indebtedness.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

During the period covered by this Report, there was no information required to be disclosed by us in a Current Report on Form 8-K that was not so reported, nor were there any material changes to the procedures by which our security holders may recommend nominees to the General Partner's board of directors.

51

Item 6. Exhibits

(a) Exhibits

3.1	Sixth Amended and Restated Articles of Incorporation of the General Partner (filed as Exhibit 3.1 to the combined Current Report on Form 8-K of the General Partner and the Partnership as filed with the SEC on January 5, 2015, and incorporated herein by this reference).
3.2	Fourth Amended and Restated Bylaws of the General Partner (filed as Exhibit 3.2 to the General Partner's Current Report on Form 8-K as filed with the SEC on July 30, 2009, and incorporated herein by this reference).
3.3	Certificate of Limited Partnership of the Partnership, dated September 17, 1993 (filed as Exhibit 3.1(i) to the Partnership's Annual Report on Form 10-K for the year ended December 31, 2006 as filed with the SEC on March 13, 2007, and incorporated herein by this reference) (File No. 000-20625).
3.4 (i)	Fifth Amended and Restated Agreement of Limited Partnership of the Partnership (filed as Exhibit 3.2 to the combined Current Report on Form 8-K of the General Partner and the Partnership as filed with the SEC on May 5, 2014, and incorporated herein by this reference).
3.4 (ii)	First Amendment to Fifth Amended and Restated Agreement of Limited Partnership of the Partnership (filed as Exhibit 3.2 to the combined Current Report on Form 8-K of the General Partner and the Partnership as filed with the SEC on August 6, 2014, and incorporated herein by this reference).
3.4 (iii)	Second Amendment to Fifth Amended and Restated Agreement of Limited Partnership of the Partnership (filed as Exhibit 3.2 to the combined Current Report on Form 8-K of the General Partner and the Partnership as filed with the SEC on December 16, 2014, and incorporated herein by this reference).
3.4 (iv)	Third Amendment to Fifth Amended and Restated Agreement of Limited Partnership of the Partnership (filed as Exhibit 3.2 to the combined Current Report on Form 8-K of the General Partner and the Partnership as filed with the SEC on January 5, 2015, and incorporated herein by this reference).
3.4 (v)	Fourth Amendment to Fifth Amended and Restated Agreement of Limited Partnership of the Partnership (filed as Exhibit 3.1 to the combined Current Report on Form 8-K of the General Partner and the Partnership as filed with the SEC on January 29, 2015, and incorporated herein by this reference).
4.1	Specimen certificate for shares of common stock, $.01 par value (filed as Exhibit 4.1 to the combined Current Report on Form 8-K of the General Partner and the Partnership as filed with the SEC on July 28, 2016, and incorporated herein by this reference).
4.2	Thirteenth Supplemental Indenture, dated as of June 23, 2016, by and between the Partnership and the Bank of New York Mellon Trust Company, N.A. (as successor to J.P. Morgan Trust Company, National Association), as trustee, including the form of global note evidencing the 3.250% Senior Notes Due 2026 (filed as Exhibit 4.1 to the combined Current Report on Form 8-K of the General Partner and the Partnership as filed with the SEC on June 23, 2016, and incorporated herein by this reference).
11.1	Statement Regarding Computation of Earnings.***
12.1	Statement of Computation of Ratio of Earnings to Fixed Charges and Ratio of Earnings to Combined Fixed Charges and Preferred Dividends of the General Partner.*
12.2	Statement of Computation of Ratio of Earnings to Fixed Charges and Ratio of Earnings to Combined Fixed Charges and Preferred Distributions of the Partnership.*
31.1	Rule 13a-14(a) Certification of the Chief Executive Officer of the General Partner.*
31.2	Rule 13a-14(a) Certification of the Chief Financial Officer of the General Partner.*
31.3	Rule 13a-14(a) Certification of the Chief Executive Officer for the Partnership.*
31.4	Rule 13a-14(a) Certification of the Chief Financial Officer for the Partnership.*
32.1	Section 1350 Certification of the Chief Executive Officer of the General Partner.**
32.2	Section 1350 Certification of the Chief Financial Officer of the General Partner.**
32.3	Section 1350 Certification of the Chief Executive Officer for the Partnership.**
32.4	Section 1350 Certification of the Chief Financial Officer for the Partnership.**

52

101 The following materials from the General Partner's and the Partnership's Quarterly Report on Form 10-Q for the quarter ended June 30, 2016 formatted in XBRL (eXtensible Business Reporting Language): (i) the Consolidated Balance Sheets, (ii) the Consolidated Statements of Operations and Comprehensive Income, (iii) the Consolidated Statements of Cash Flows, (iv) the Consolidated Statements of Changes in Equity, and (v) the Notes to Consolidated Financial Statements.

* Filed herewith.

** The certifications attached as Exhibits 32.1, 32.2, 32.3 and 32.4 accompany this Quarterly Report on Form 10-Q and are "furnished" to the Securities and Exchange Commission pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not be deemed "filed" by the General Partner or the Partnership, respectively, for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.

*** Data required by Financial Accounting Standards Board Auditing Standards Codification No. 260 is provided in Note 9 to the Consolidated Financial Statements included in this report.

53

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

DUKE REALTY CORPORATION

/s/ James B. Connor

James B. Connor

President, Chief Executive Officer and Director

/s/ Mark A. Denien

Mark A. Denien

Executive Vice President and Chief Financial Officer

		DUKE REALTY LIMITED PARTNERSHIP
		By: DUKE REALTY CORPORATION, its general partner
		/s/ James B. Connor
		James B. Connor
		President, Chief Executive Officer and Director of the General Partner
		/s/ Mark A. Denien
		Mark A. Denien
		Executive Vice President and Chief Financial Officer of the General Partner
Date:	August 3, 2016

54

EX-12.1

EXHIBIT 12.1

DUKE REALTY CORPORATION

CALCULATION OF RATIO OF EARNINGS TO FIXED CHARGES AND RATIO OF EARNINGS TO

COMBINED FIXED CHARGES AND PREFERRED DIVIDENDS

(in thousands, except ratios)

	Six Months Ended June 30, 2016		Year Ended December 31, 2015		Year Ended December 31, 2014		Year Ended December 31, 2013		Year Ended December 31, 2012				Year Ended December 31, 2011
Net income (loss) from continuing operations, less preferred dividends	$	153,409	$	189,205	$	190,647	$	27,886	$	(126,873	)		$	(61,143	)
Preferred dividends	—		—		24,943		31,616		46,438				60,353
Interest expense	74,914		173,574		196,186		202,174		202,109				181,734
Earnings before fixed charges	$	228,323	$	362,779	$	411,776	$	261,676	$	121,674			$	180,944
Interest expense	$	74,914	$	173,574	$	196,186	$	202,174	$	202,109			$	181,734
Interest costs capitalized	9,519		16,764		17,620		16,756		9,357				4,335
Total fixed charges	84,433		190,338		213,806		218,930		211,466				186,069
Preferred dividends	—		—		24,943		31,616		46,438				60,353
Total fixed charges and preferred dividends	$	84,433	$	190,338	$	238,749	$	250,546	$	257,904			$	246,422
Ratio of earnings to fixed charges	2.70		1.91		1.93		1.20		N/A			(1)	N/A			(3)
Ratio of earnings to fixed charges and preferred dividends	2.70		1.91		1.72		1.04		N/A			(2)	N/A			(4)

(1) N/A - The ratio is less than 1.0; deficit of $89.8 million exists for the year ended December 31, 2012. The calculation of earnings includes $305.6 million of non-cash depreciation and amortization expense.

(2) N/A - The ratio is less than 1.0; deficit of $136.2 million exists for the year ended December 31, 2012. The calculation of earnings includes $305.6 million of non-cash depreciation and amortization expense.

(3) N/A - The ratio is less than 1.0; deficit of $5.1 million exists for the year ended December 31, 2011. The calculation of earnings includes $263.4 million of non-cash depreciation and amortization expense.

(4) N/A - The ratio is less than 1.0; deficit of $65.5 million exists for the year ended December 31, 2011. The calculation of earnings includes $263.4 million of non-cash depreciation and amortization expense.

EX-12.2

EXHIBIT 12.2

DUKE REALTY LIMITED PARTNERSHIP

CALCULATION OF RATIO OF EARNINGS TO FIXED CHARGES AND RATIO OF EARNINGS TO

COMBINED FIXED CHARGES AND PREFERRED DISTRIBUTIONS

(in thousands, except ratios)

	Six Months Ended June 30, 2016		Year Ended December 31, 2015		Year Ended December 31, 2014		Year Ended December 31, 2013		Year Ended December 31, 2012				Year Ended December 31, 2011
Net income (loss) from continuing operations, less preferred distributions	$	153,409	$	189,205	$	190,647	$	27,886	$	(126,873	)		$	(61,143	)
Preferred distributions	—		—		24,943		31,616		46,438				60,353
Interest expense	74,914		173,574		196,186		202,174		202,109				181,734
Earnings before fixed charges	$	228,323	$	362,779	$	411,776	$	261,676	$	121,674			$	180,944
Interest expense	$	74,914	$	173,574	$	196,186	$	202,174	$	202,109			$	181,734
Interest costs capitalized	9,519		16,764		17,620		16,756		9,357				4,335
Total fixed charges	84,433		190,338		213,806		218,930		211,466				186,069
Preferred distributions	—		—		24,943		31,616		46,438				60,353
Total fixed charges and preferred distributions	$	84,433	$	190,338	$	238,749	$	250,546	$	257,904			$	246,422
Ratio of earnings to fixed charges	2.70		1.91		1.93		1.20		N/A			(1)	N/A			(3)
Ratio of earnings to fixed charges and preferred distributions	2.70		1.91		1.72		1.04		N/A			(2)	N/A			(4)

(1) N/A - The ratio is less than 1.0; deficit of $89.8 million exists for the year ended December 31, 2012. The calculation of earnings includes $305.6 million of non-cash depreciation and amortization expense.

(2) N/A - The ratio is less than 1.0; deficit of $136.2 million exists for the year ended December 31, 2012. The calculation of earnings includes $305.6 million of non-cash depreciation and amortization expense.

(3) N/A - The ratio is less than 1.0; deficit of $5.1 million exists for the year ended December 31, 2011. The calculation of earnings includes $263.4 million of non-cash depreciation and amortization expense.

(4) N/A - The ratio is less than 1.0; deficit of $65.5 million exists for the year ended December 31, 2011. The calculation of earnings includes $263.4 million of non-cash depreciation and amortization expense.

EX-31.1

EXHIBIT 31.1

DUKE REALTY CORPORATION

CERTIFICATION OF THE CHIEF EXECUTIVE OFFICER

I, James B. Connor, certify that:

1 I have reviewed this Quarterly Report on Form 10-Q of Duke Realty Corporation;

2 Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3 Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4 The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5 The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 3, 2016

/s/ James B. Connor

James B. Connor

President and Chief Executive Officer

EX-31.2

EXHIBIT 31.2

DUKE REALTY CORPORATION

CERTIFICATION OF THE CHIEF FINANCIAL OFFICER

I, Mark A. Denien, certify that:

1 I have reviewed this Quarterly Report on Form 10-Q of Duke Realty Corporation;

2 Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3 Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4 The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5 The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 3, 2016

/s/ Mark A. Denien

Mark A. Denien

Executive Vice President and Chief Financial Officer

EX-31.3

EXHIBIT 31.3

DUKE REALTY LIMITED PARTNERSHIP

CERTIFICATION OF THE CHIEF EXECUTIVE OFFICER

I, James B. Connor, certify that:

1 I have reviewed this Quarterly Report on Form 10-Q of Duke Realty Limited Partnership;

2 Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3 Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4 The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5 The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 3, 2016

/s/ James B. Connor

James B. Connor

President and Chief Executive Officer of the General Partner

EX-31.4

EXHIBIT 31.4

DUKE REALTY LIMITED PARTNERSHIP

CERTIFICATION OF THE CHIEF FINANCIAL OFFICER

I, Mark A. Denien, certify that:

1 I have reviewed this Quarterly Report on Form 10-Q of Duke Realty Limited Partnership;

2 Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3 Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4 The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5 The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 3, 2016

/s/ Mark A. Denien

Mark A. Denien

Executive Vice President and Chief Financial Officer of the General Partner

EX-32.1

EXHIBIT 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Duke Realty Corporation (the “General Partner”) on Form 10-Q for the quarter ending June 30, 2016 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, James B. Connor, Chief Executive Officer of the General Partner, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the General Partner.

/s/ James B. Connor
James B. Connor
President and Chief Executive Officer
Date:	August 3, 2016

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to Duke Realty Corporation, and will be retained by Duke Realty Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

EXHIBIT 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Duke Realty Corporation (the “General Partner”) on Form 10-Q for the quarter ending June 30, 2016 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Mark A. Denien, Executive Vice President and Chief Financial Officer of the General Partner, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the General Partner.

/s/ Mark A. Denien
Mark A. Denien
Executive Vice President and Chief Financial Officer
Date:	August 3, 2016

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to Duke Realty Corporation, and will be retained by Duke Realty Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.3

EXHIBIT 32.3

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Duke Realty Limited Partnership (the “Partnership”) on Form 10-Q for the quarter ending June 30, 2016 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, James B. Connor, Chief Executive Officer of Duke Realty Corporation, the general partner of the Partnership (the “General Partner”), certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Partnership.

/s/ James B. Connor
James B. Connor
President and Chief Executive Officer of the General Partner
Date:	August 3, 2016

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to Duke Realty Limited Partnership, and will be retained by Duke Realty Limited Partnership and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.4

EXHIBIT 32.4

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Duke Realty Limited Partnership (the “Partnership”) on Form 10-Q for the quarter ending June 30, 2016 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Mark A. Denien, Executive Vice President and Chief Financial Officer of Duke Realty Corporation, the general partner of the Partnership (the “General Partner”), certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Partnership.

/s/ Mark A. Denien
Mark A. Denien
Executive Vice President and Chief Financial Officer of the General Partner
Date:	August 3, 2016

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to Duke Realty Limited Partnership, and will be retained by Duke Realty Limited Partnership and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2016	Aug. 01, 2016
Entity Information [Line Items]
Entity Registrant Name	DUKE REALTY CORP
Entity Central Index Key	0000783280
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		350,757,501
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	0001003410
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
ASSETS
Land and improvements	$ 1,514,975	$ 1,391,763
Buildings and tenant improvements	5,008,656	4,740,837
Construction in progress	213,962	321,062
Investments in and advances to unconsolidated companies	289,299	268,390
Undeveloped land	307,627	383,045
Real estate investment property, at cost, total	7,334,519	7,105,097
Accumulated depreciation	(1,290,102)	(1,192,425)
Net real estate investments	6,044,417	5,912,672
Real estate investments and other assets held-for-sale	3,462	45,801
Cash and cash equivalents	91,700	22,533
Accounts receivable, net of allowance	21,439	18,846
Straight-line rent receivable, net of allowance	120,096	116,781
Receivables on construction contracts, including retentions	13,437	16,459
Deferred leasing and other costs, net of accumulated amortization	345,472	346,374
Escrow deposits and other assets	225,002	416,049
Total Assets	6,865,025	6,895,515
LIABILITIES AND EQUITY
Secured debt, net of deferred financing costs	389,679	738,444
Unsecured debt, net of deferred financing costs	2,808,102	2,510,697
Unsecured line of credit	0	71,000
Long-term debt, total	3,197,781	3,320,141
Liabilities related to real estate investments held-for-sale	645	972
Construction payables and amounts due subcontractors, including retentions	46,100	54,921
Accrued real estate taxes	78,117	71,617
Accrued interest	31,837	34,447
Other accrued expenses	34,338	61,827
Other liabilities	94,391	106,283
Tenant security deposits and prepaid rents	41,607	40,506
Total Liabilities	3,524,816	3,690,714
Equity
Common shares	3,503	3,453
Additional paid-in capital	5,068,217	4,961,923
Accumulated other comprehensive income	1,216	1,806
Distributions in excess of net income	(1,758,547)	(1,785,250)
Total shareholders' equity	3,314,389	3,181,932
Noncontrolling interests	25,820	22,869
Total Equity	3,340,209	3,204,801
Total Liabilities and Equity	6,865,025	6,895,515
Duke Realty Limited Partnership [Member]
ASSETS
Land and improvements	1,514,975	1,391,763
Buildings and tenant improvements	5,008,656	4,740,837
Construction in progress	213,962	321,062
Investments in and advances to unconsolidated companies	289,299	268,390
Undeveloped land	307,627	383,045
Real estate investment property, at cost, total	7,334,519	7,105,097
Accumulated depreciation	(1,290,102)	(1,192,425)
Net real estate investments	6,044,417	5,912,672
Real estate investments and other assets held-for-sale	3,462	45,801
Cash and cash equivalents	91,700	22,533
Accounts receivable, net of allowance	21,439	18,846
Straight-line rent receivable, net of allowance	120,096	116,781
Receivables on construction contracts, including retentions	13,437	16,459
Deferred leasing and other costs, net of accumulated amortization	345,472	346,374
Escrow deposits and other assets	225,002	416,049
Total Assets	6,865,025	6,895,515
LIABILITIES AND EQUITY
Secured debt, net of deferred financing costs	389,679	738,444
Unsecured debt, net of deferred financing costs	2,808,102	2,510,697
Unsecured line of credit	0	71,000
Long-term debt, total	3,197,781	3,320,141
Liabilities related to real estate investments held-for-sale	645	972
Construction payables and amounts due subcontractors, including retentions	46,100	54,921
Accrued real estate taxes	78,117	71,617
Accrued interest	31,837	34,447
Other accrued expenses	34,338	61,827
Other liabilities	94,391	106,283
Tenant security deposits and prepaid rents	41,607	40,506
Total Liabilities	3,524,816	3,690,714
Equity
Common equity	3,313,173	3,180,126
General Partners' equity	3,313,173	3,180,126
Limited Partners' common equity	23,009	20,032
Accumulated other comprehensive income	1,216	1,806
Total partners' equity	3,337,398	3,201,964
Noncontrolling interests	2,811	2,837
Total Equity	3,340,209	3,204,801
Total Liabilities and Equity	$ 6,865,025	$ 6,895,515

XML

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Accounts receivable, allowance	$ 1,170	$ 1,113
Straight-line rent receivable, allowance	6,243	6,155
Deferred leasing and other costs, accumulated amortization	257,712	245,426
Deferred Finance Costs, Net	$ 25,588	$ 21,598
Common shares, par value	$ 0.01	$ 0.01
Common shares, shares authorized	600,000,000	600,000,000
Common shares, shares issued	350,273,000	345,285,000
Common shares, shares outstanding	350,273,000	345,285,000
Duke Realty Limited Partnership [Member]
Accounts receivable, allowance	$ 1,170	$ 1,113
Straight-line rent receivable, allowance	6,243	6,155
Deferred leasing and other costs, accumulated amortization	$ 257,712	$ 245,426
Common equity, General Partner Units issued	350,273,000	345,285,000
Common equity, General Partner Units outstanding	350,273,000	345,285,000
Limited Partner Units issued	3,496,000	3,487,000
Limited Partner Units outstanding	3,496,000	3,487,000
Secured Debt [Member]
Deferred Finance Costs, Net	$ 1,161	$ 1,552
Secured Debt [Member] | Duke Realty Limited Partnership [Member]
Deferred Finance Costs, Net	1,161	1,552
Unsecured Debt [Member]
Deferred Finance Costs, Net	24,427	20,046
Unsecured Debt [Member] | Duke Realty Limited Partnership [Member]
Deferred Finance Costs, Net	$ 24,427	$ 20,046

XML

Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues:
Rental and related revenue	$ 200,520	$ 201,996	$ 402,323	$ 416,611
General contractor and service fee revenue	26,044	23,901	49,195	76,722
Revenues, total	226,564	225,897	451,518	493,333
Expenses:
Rental expenses	25,729	30,094	55,008	66,218
Real estate taxes	29,948	27,747	59,575	58,526
General contractor and other services expenses	22,228	21,738	43,148	68,762
Depreciation and amortization	80,161	78,334	157,959	160,237
Costs and expenses, total	158,066	157,913	315,690	353,743
Other operating activities:
Equity in earnings of unconsolidated companies	3,534	15,123	25,394	21,369
Gain on dissolution of unconsolidated company	30,697	0	30,697	0
Promote income	24,087	0	24,087	0
Gain on sale of properties	39,314	107,410	54,891	130,894
Gain on land sales	707	17,012	837	22,437
Other operating expenses	(836)	(1,555)	(2,072)	(3,112)
Impairment charges	(5,651)	(5,470)	(12,056)	(5,470)
General and administrative expenses	(11,584)	(19,238)	(29,682)	(36,242)
Other Operating Activities, Net	80,268	113,282	92,096	129,876
Operating income	148,766	181,266	227,924	269,466
Other income (expenses):
Interest and other income, net	567	1,375	3,090	1,713
Interest expense	(37,184)	(42,976)	(74,914)	(92,567)
Gains (Losses) on Extinguishment of Debt	(2,430)	(82,653)	(2,430)	(82,653)
Acquisition-related activity	(72)	(1,305)	(75)	(1,333)
Income from continuing operations before income taxes	109,647	55,707	153,595	94,626
Income tax benefit (expense)	157	2,288	(186)	804
Income from continuing operations	109,804	57,995	153,409	95,430
Discontinued operations:
Income before gain on sales	127	36	364	10,195
Gain on sale of depreciable properties, net of tax	252	396,134	166	414,509
Income from discontinued operations	379	396,170	530	424,704
Net income	110,183	454,165	153,939	520,134
Net income attributable to noncontrolling interests	(1,116)	(4,785)	(1,565)	(5,510)
Net income attributable to common shareholders	$ 109,067	$ 449,380	$ 152,374	$ 514,624
Basic net income per common share/unit:
Continuing operations attributable to common shareholders/unitholders	$ 0.31	$ 0.16	$ 0.44	$ 0.27
Discontinued operations attributable to common shareholders/unitholders	0.00	1.14	0.00	1.22
Total	0.31	1.30	0.44	1.49
Diluted net income per common share/unit:
Continuing operations attributable to common shareholders/unitholders	0.31	0.16	0.44	0.27
Discontinued operations attributable to common shareholders/unitholders	0.00	1.14	0.00	1.22
Total	$ 0.31	$ 1.30	$ 0.44	$ 1.49
Weighted average number of common shares/units outstanding	347,464	345,098	346,564	344,849
Weighted average number of common shares/units and potential dilutive securities	354,433	349,161	352,227	348,945
Comprehensive income:
Net income	$ 110,183	$ 454,165	$ 153,939	$ 520,134
Other comprehensive loss:
Amortization of interest contracts	(295)	(276)	(590)	(563)
Other Comprehensive Income, Other, Net of Tax	0	(123)	0	(123)
Total other comprehensive loss	(295)	(399)	(590)	(686)
Comprehensive income	109,888	453,766	153,349	519,448
Duke Realty Limited Partnership [Member]
Revenues:
Rental and related revenue	200,520	201,996	402,323	416,611
General contractor and service fee revenue	26,044	23,901	49,195	76,722
Revenues, total	226,564	225,897	451,518	493,333
Expenses:
Rental expenses	25,729	30,094	55,008	66,218
Real estate taxes	29,948	27,747	59,575	58,526
General contractor and other services expenses	22,228	21,738	43,148	68,762
Depreciation and amortization	80,161	78,334	157,959	160,237
Costs and expenses, total	158,066	157,913	315,690	353,743
Other operating activities:
Equity in earnings of unconsolidated companies	3,534	15,123	25,394	21,369
Gain on dissolution of unconsolidated company	30,697	0	30,697	0
Promote income	24,087	0	24,087	0
Gain on sale of properties	39,314	107,410	54,891	130,894
Gain on land sales	707	17,012	837	22,437
Other operating expenses	(836)	(1,555)	(2,072)	(3,112)
Impairment charges	(5,651)	(5,470)	(12,056)	(5,470)
General and administrative expenses	(11,584)	(19,238)	(29,682)	(36,242)
Other Operating Activities, Net	80,268	113,282	92,096	129,876
Operating income	148,766	181,266	227,924	269,466
Other income (expenses):
Interest and other income, net	567	1,375	3,090	1,713
Interest expense	(37,184)	(42,976)	(74,914)	(92,567)
Gains (Losses) on Extinguishment of Debt	(2,430)	(82,653)	(2,430)	(82,653)
Acquisition-related activity	(72)	(1,305)	(75)	(1,333)
Income from continuing operations before income taxes	109,647	55,707	153,595	94,626
Income tax benefit (expense)	157	2,288	(186)	804
Income from continuing operations	109,804	57,995	153,409	95,430
Discontinued operations:
Income before gain on sales	127	36	364	10,195
Gain on sale of depreciable properties, net of tax	252	396,134	166	414,509
Income from discontinued operations	379	396,170	530	424,704
Net income	110,183	454,165	153,939	520,134
Noncontrolling Interest in Net Income (Loss) Joint Venture Partners, NonRedeemable	(15)	(23)	(26)	(49)
Net income attributable to common shareholders	$ 110,168	$ 454,142	$ 153,913	$ 520,085
Basic net income per common share/unit:
Continuing operations attributable to common shareholders/unitholders	$ 0.31	$ 0.16	$ 0.44	$ 0.27
Discontinued operations attributable to common shareholders/unitholders	0.00	1.14	0.00	1.22
Total	0.31	1.30	0.44	1.49
Diluted net income per common share/unit:
Continuing operations attributable to common shareholders/unitholders	0.31	0.16	0.44	0.27
Discontinued operations attributable to common shareholders/unitholders	0.00	1.14	0.00	1.22
Total	$ 0.31	$ 1.30	$ 0.44	$ 1.49
Weighted average number of common shares/units outstanding	350,968	348,728	350,065	348,511
Weighted average number of common shares/units and potential dilutive securities	354,433	349,161	352,227	348,945
Comprehensive income:
Net income	$ 110,183	$ 454,165	$ 153,939	$ 520,134
Other comprehensive loss:
Amortization of interest contracts	(295)	(276)	(590)	(563)
Other Comprehensive Income, Other, Net of Tax	0	(123)	0	(123)
Total other comprehensive loss	(295)	(399)	(590)	(686)
Comprehensive income	$ 109,888	$ 453,766	$ 153,349	$ 519,448

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Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:
Net income	$ 153,939	$ 520,134
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	126,594	128,624
Amortization of deferred leasing and other costs	31,365	35,130
Amortization of deferred financing costs	2,608	3,835
Straight-line rental income and expense, net	(5,768)	(12,775)
Impairment charges	12,056	5,470
Gains (Losses) on Extinguishment of Debt	2,430	82,653
Gain on dissolution of unconsolidated company	(30,697)	0
Accrued promote income	(24,087)	0
Gains on land and depreciated property sales	(55,894)	(571,060)
Third-party construction contracts, net	723	4,956
Other accrued revenues and expenses, net	(5,817)	(11,924)
Operating distributions received in excess of (less than) equity in earnings from unconsolidated companies	(16,080)	(9,391)
Net cash provided by operating activities	191,372	175,652
Cash flows from investing activities:
Development of real estate investments	(213,262)	(109,617)
Acquisition of real estate investments and related intangible assets	(16,029)	(20,929)
Acquisition of undeveloped land	(27,243)	(25,579)
Second generation tenant improvements, leasing costs and building improvements	(30,237)	(30,871)
Other deferred leasing costs	(14,993)	(22,302)
Other assets	182,996	(94,745)
Proceeds from land and depreciated property sales, net	174,882	1,305,794
Capital distributions from unconsolidated companies	36,328	67,004
Capital contributions and advances to unconsolidated companies	(50,955)	(50,208)
Net cash provided by investing activities	41,487	1,018,547
Cash flows from financing activities:
Proceeds from issuance of common shares, net	99,844	4,756
Proceeds from Issuance of Unsecured Debt	375,000	0
Payments on unsecured debt	(75,668)	(759,354)
Payments on secured indebtedness including principal amortization	(348,743)	(207,169)
Repayments of line of credit, net	(71,000)	(106,000)
Distributions to common shareholders/unitholders	(124,651)	(117,274)
Distributions to Noncontrolling Interest, Net	(1,304)	(1,394)
Change in book overdrafts	(10,974)	(5,322)
Deferred financing costs	(6,196)	(110)
Net cash used for financing activities	(163,692)	(1,191,867)
Net increase in cash and cash equivalents	69,167	2,332
Cash and cash equivalents at beginning of period	22,533	17,922
Cash and cash equivalents at end of period	91,700	20,254
Noncash investing and financing activities:
Mortgage notes receivable from buyers in property sales	1,685	200,000
Conversion of Limited Partner Units to common shares	185	(1,693)
Duke Realty Limited Partnership [Member]
Cash flows from operating activities:
Net income	153,939	520,134
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	126,594	128,624
Amortization of deferred leasing and other costs	31,365	35,130
Amortization of deferred financing costs	2,608	3,835
Straight-line rental income and expense, net	(5,768)	(12,775)
Impairment charges	12,056	5,470
Gains (Losses) on Extinguishment of Debt	2,430	82,653
Gain on dissolution of unconsolidated company	(30,697)	0
Accrued promote income	(24,087)	0
Gains on land and depreciated property sales	(55,894)	(571,060)
Third-party construction contracts, net	723	4,956
Other accrued revenues and expenses, net	(5,817)	(11,875)
Operating distributions received in excess of (less than) equity in earnings from unconsolidated companies	(16,080)	(9,391)
Net cash provided by operating activities	191,372	175,701
Cash flows from investing activities:
Development of real estate investments	(213,262)	(109,617)
Acquisition of real estate investments and related intangible assets	(16,029)	(20,929)
Acquisition of undeveloped land	(27,243)	(25,579)
Second generation tenant improvements, leasing costs and building improvements	(30,237)	(30,871)
Other deferred leasing costs	(14,993)	(22,302)
Other assets	182,996	(94,745)
Proceeds from land and depreciated property sales, net	174,882	1,305,794
Capital distributions from unconsolidated companies	36,328	67,004
Capital contributions and advances to unconsolidated companies	(50,955)	(50,208)
Net cash provided by investing activities	41,487	1,018,547
Cash flows from financing activities:
Contributions from the General Partner	99,844	4,707
Proceeds from Issuance of Unsecured Debt	375,000	0
Payments on unsecured debt	(75,668)	(759,354)
Payments on secured indebtedness including principal amortization	(348,743)	(207,169)
Repayments of line of credit, net	(71,000)	(106,000)
Distributions to common shareholders/unitholders	(125,903)	(118,525)
Distributions to Noncontrolling Interest, Net	(52)	(143)
Change in book overdrafts	(10,974)	(5,322)
Deferred financing costs	(6,196)	(110)
Net cash used for financing activities	(163,692)	(1,191,916)
Net increase in cash and cash equivalents	69,167	2,332
Cash and cash equivalents at beginning of period	22,533	17,922
Cash and cash equivalents at end of period	91,700	20,254
Noncash investing and financing activities:
Mortgage notes receivable from buyers in property sales	1,685	200,000
Conversion of Limited Partner Units to common shares	$ 185	$ (1,693)

XML

Consolidated Statement of Changes in Equity - 6 months ended Jun. 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 Partner [Member]	Duke Realty Limited Partnership [Member] Accumulated Other Comprehensive Income (Loss) [Member]	Duke Realty Limited Partnership [Member] Non-controlling Interest [Member]	Duke Realty Limited Partnership [Member] Stockholders' Equity, Total [Member]
Beginning Balance - General Partner at Dec. 31, 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	153,939				152,374	1,565	153,939	152,374	1,539		26	153,913
Other comprehensive loss	(590)			(590)			(590)			(590)		(590)
Issuance of common shares	99,844	42	99,802
Capital contribution from the General Partner							99,844	99,844				99,844
Stock based compensation plan activity	8,170	8	6,307		(1,020)	2,875	8,170	5,295	2,875			8,170
Conversion of Limited Partner Units			185			(185)		185	(185)
Distributions to Partners'							(125,903)	(124,651)	(1,252)			(125,903)
Distributions to common shareholders	(124,651)				(124,651)
Distributions to noncontrolling interests	(1,304)					(1,304)	(52)				(52)
Ending Balance - General Partner at Jun. 30, 2016	$ 3,340,209	$ 3,503	$ 5,068,217	$ 1,216	$ (1,758,547)	$ 25,820
Ending Balance - Partnership at Jun. 30, 2016							$ 3,340,209	$ 3,313,173	$ 23,009	$ 1,216	$ 2,811	$ 3,337,398

XML

Consolidated Statement of Changes in Equity (Parenthetical)	6 Months Ended
	Jun. 30, 2016 $ / shares
Distributions to common shareholders, per share	$ 0.36
Duke Realty Limited Partnership [Member]
Distributions to Partners, per Common Unit	$ 0.36

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General Basis of Presentation (Notes)

6 Months Ended

Jun. 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 Duke Realty Corporation (the "General Partner") and Duke Realty Limited Partnership (the "Partnership"). In this Quarterly Report on Form 10-Q ("Report"), unless the context indicates otherwise, the terms "Company," "we," "us" and "our" refer to the General Partner and the Partnership, collectively, and those entities owned or controlled by the General Partner and/or the Partnership. The 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 real estate investment trust ("REIT") under the provisions of the Internal Revenue Code of 1986, as amended (the "Code"). The Partnership was formed on October 4, 1993, when the General Partner contributed all of its properties and related assets and liabilities, together with the net proceeds from an offering of additional shares of its common stock, to the Partnership. Simultaneously, the Partnership completed the acquisition of Duke Associates, a full-service commercial real estate firm operating in the Midwest whose operations began in 1972.

The General Partner is the sole general partner of the Partnership, owning approximately 99.0% of the common partnership interests of the Partnership ("General Partner Units") at June 30, 2016. The remaining 1.0% of the common partnership interests ("Limited Partner Units" and, together with the General Partner Units, the "Common Units") are owned by limited partners. As the sole general partner of the Partnership, the General Partner has full, exclusive and complete responsibility and discretion in the day-to-day management and control of the Partnership. The General Partner and the Partnership are operated as one enterprise. The management of the General Partner consists of the same members as the management of the Partnership. As the sole general partner with control of the Partnership, the General Partner consolidates the Partnership for financial reporting purposes, and the General Partner does not have any significant assets other than its investment in the Partnership. Therefore, the assets and liabilities of the General Partner and the Partnership are substantially the same.

Limited Partners have the right to redeem their Limited Partner Units, subject to certain restrictions. Pursuant to the Fifth Amended and Restated Agreement of Limited Partnership, as amended (the "Partnership Agreement"), the General Partner is obligated to redeem the Limited Partner Units in shares of its common stock, unless it determines in its reasonable discretion that the issuance of shares of its common stock could cause it to fail to qualify as a REIT. Each Limited Partner Unit shall be redeemed for one share of the General Partner's common stock, or, in the event that the issuance of shares could cause the General Partner to fail to qualify as a REIT, cash equal to the fair market value of one share of the General Partner's common stock at the time of redemption, in each case, subject to certain adjustments described in the Partnership Agreement. The Limited Partner Units are not required, per the terms of the Partnership Agreement, to be redeemed in registered shares of the General Partner.

As of June 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.

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New Accounting Pronouncement (Notes)

6 Months Ended

Jun. 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 the company expects to be entitled in exchange for fulfilling those performance obligations. In doing so, companies will need to exercise more judgment and make more estimates than under existing GAAP guidance.

ASU 2014-09 will be effective for public entities for annual and interim reporting periods beginning after December 15, 2017 and early adoption is permitted in periods ending after December 15, 2016. ASU 2014-09 allows for either recognizing the cumulative effect of application (i) at the start of the earliest comparative period presented (with the option to use any or all of three practical expedients) or (ii) at the date of initial application, with no restatement of comparative periods presented.

We have not yet selected a transition method nor have we determined the effect of ASU 2014-09 on our consolidated financial statements.

Consolidation

In February 2015, the FASB issued ASU 2015-02, Amendments to the Consolidation Analysis ("ASU 2015-02"). ASU 2015-02 makes targeted amendments to the current consolidation guidance and ends the deferral granted to investment companies from applying the existing variable interest entity ("VIE") guidance. ASU 2015-02 is 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 requires 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 is effective 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 amends the retroactive requirement to apply adjustments made to provisional amounts recognized in a business combination. The update requires 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 is 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 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 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.

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Reclassifications

6 Months Ended

Jun. 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.

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Variable Interest Entities

6 Months Ended

Jun. 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 June 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 $75.5 million at June 30, 2016.

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Acquisitions and Dispositions

6 Months Ended

Jun. 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. With the exception of certain properties that have been sold or classified as held for sale, the results of operations for all acquired properties have been included in continuing operations within our consolidated financial statements since their respective dates of acquisition.

Acquisitions

We acquired two properties during the six months ended June 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:

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 $364,000 in rental revenues and $89,000 in income from continuing operations during the six months ended June 30, 2016 for the properties since their respective dates of acquisition.

Distribution of Joint Venture Properties

Included in our property acquisitions for the six months ended June 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

The plan of dissolution for Duke/Hulfish also contained provisions that effectively established a minimum amount of promote income (additional incentive-based cash distributions from the joint venture, in excess of our 20% ownership interest) to which we would be entitled. This amount, totaling $24.1 million, was recognized during the six months ended June 30, 2016 and is reflected within investments in and advances to unconsolidated companies on our consolidated Balance Sheet as of June 30, 2016. This amount was fully collected in late July 2016 when Duke/Hulfish sold its last remaining property to a third party.

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 six months ended June 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 $174.9 million and $1.31 billion during the six months ended June 30, 2016 and 2015, respectively.

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Indebtedness

6 Months Ended

Jun. 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 for the six months endedJune 30, 2016 (in thousands):

	Book Value at 12/31/2015		Book Value at 6/30/2016		Fair Value at 12/31/2015		Issuances and Assumptions		Payments/Payoffs			Adjustments to Fair Value			Fair Value at 6/30/2016
Fixed rate secured debt	$	736,896	$	387,740	$	789,095	$	—	$	(348,702	)	$	(1,346	)	$	439,047
Variable rate secured debt	3,100		3,100		3,100		—		—			—			3,100
Unsecured debt	2,530,743		2,832,529		2,624,795		375,000		(73,214		)	80,343			3,006,924
Unsecured line of credit	71,000		—		70,852		—		(71,000		)	148			—
Total	$	3,341,739	$	3,223,369	$	3,487,842	$	375,000	$	(492,916	)	$	79,145		$	3,449,071
Less: Deferred financing costs	21,598		25,588
Total indebtedness as reported on the consolidated balance sheets	$	3,320,141	$	3,197,781

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 3.10%, depending on the attributes of the specific loans. The current market rates we utilized were internally estimated; therefore, we have concluded that our determination of fair value for our fixed rate secured debt was primarily based upon level 3 inputs.

During the six months endedJune 30, 2016, we repaid four loans, totaling $344.7 million, which had a weighted average stated rate of 5.90%.

Unsecured Debt

At June 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 101.00% to 133.00% of face value.

In June 2016, we issued $375.0 million of 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% notes due February 2017, for a cash payment of $74.5 million.

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 1.60% 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 June 30, 2016.

Unsecured Line of Credit

Our unsecured line of credit at June 30, 2016 is described as follows (in thousands):

Description	Maximum Capacity		Maturity Date	Outstanding Balance at June 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 $1.6 billion. This line of credit provides us with an option to obtain borrowings from financial institutions that participate in the line at rates that may be lower than the stated interest rate, subject to certain restrictions.

This line of credit contains financial covenants that require us to meet certain financial ratios and defined levels of performance, including those related to fixed charge coverage, unsecured interest expense coverage and debt-to-asset value (with asset value being defined in the Partnership's unsecured line of credit agreement). At June 30, 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.

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Shareholders' Equity Shareholders' Equity

6 Months Ended

Jun. 30, 2016

Stockholders' Equity Note [Abstract]

Stockholders' Equity Note Disclosure [Text Block]

Shareholders' Equity of the General Partner and Partners' Capital of the Partnership

General Partner

During the six months endedJune 30, 2016, the General Partner issued 4.2 million common shares pursuant to its at the market equity program, generating gross proceeds of approximately $99.6 million and, after deducting commissions and other costs, net proceeds of approximately $98.5 million. The proceeds from these offerings were contributed to the Partnership and used for general corporate purposes.

Partnership

For each common share or preferred share that the General Partner issues, the Partnership issues a corresponding General Partner Unit or Preferred Unit, as applicable, to the General Partner in exchange for the contribution of the proceeds from the stock issuance. Similarly, when the General Partner redeems or repurchases common shares or preferred shares, the Partnership redeems the corresponding Common Units or Preferred Units held by the General Partner at the same price.

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Related Party Transactions

6 Months Ended

Jun. 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, for the three and six months endedJune 30, 2016 and 2015, respectively (in thousands): 

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2016		2015		2016		2015
Management fees	$	1,291	$	1,752	$	2,550	$	3,553
Leasing fees	1,053		389		1,432		1,022
Construction and development fees	2,239		725		5,359		1,130

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Net Income (Loss) Per Common Share

6 Months Ended

Jun. 30, 2016

Earnings Per Share [Abstract]

Net Income (Loss) Per Common Share

Net Income (Loss) Per Common Share or Common Unit

Basic net income (loss) per common share or Common Unit is computed by dividing net income (loss) attributable to common shareholders or common unitholders, less dividends or distributions on share-based awards expected to vest (referred to as "participating securities" and primarily composed of unvested restricted stock units), by the weighted average number of common shares or Common Units outstanding for the period.

Diluted net income (loss) per common share is computed by dividing the sum of basic net income (loss) attributable to common shareholders and the noncontrolling interest in earnings allocable to Limited Partner Units (to the extent the Limited Partner Units are dilutive) by the sum of the weighted average number of common shares outstanding and, to the extent they are dilutive, Units outstanding and any potential dilutive securities for the period. Diluted net income (loss) per Common Unit is computed by dividing the basic net income (loss) attributable to common unitholders by the sum of the weighted average number of Common Units outstanding and any potential dilutive securities for the period. The following table reconciles the components of basic and diluted net income per common share or Common Unit for the three and six months endedJune 30, 2016 and 2015, respectively (in thousands): 

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
General Partner
Net income attributable to common shareholders	$	109,067		$	449,380		$	152,374		$	514,624
Less: Dividends on participating securities	(582		)	(589		)	(1,171		)	(1,209		)
Basic net income attributable to common shareholders	108,485			448,791			151,203			513,415
Add back dividends on dilutive participating securities	582			—			569			—
Noncontrolling interest in earnings of common unitholders	1,101			4,762			1,539			5,461
Diluted net income attributable to common shareholders	$	110,168		$	453,553		$	153,311		$	518,876
Weighted average number of common shares outstanding	347,464			345,098			346,564			344,849
Weighted average Limited Partner Units outstanding	3,504			3,630			3,501			3,662
Other potential dilutive shares	3,465			433			2,162			434
Weighted average number of common shares and potential dilutive securities	354,433			349,161			352,227			348,945
Partnership
Net income attributable to common unitholders	$	110,168		$	454,142		$	153,913		$	520,085
Less: Distributions on participating securities	(582		)	(589		)	(1,171		)	(1,209		)
Basic net income attributable to common unitholders	$	109,586		$	453,553		$	152,742		$	518,876
Add back distributions on dilutive participating securities	582			—			569			—
Diluted net income attributable to common unitholders	$	110,168		$	453,553		$	153,311		$	518,876
Weighted average number of Common Units outstanding	350,968			348,728			350,065			348,511
Other potential dilutive units	3,465			433			2,162			434
Weighted average number of Common Units and potential dilutive securities	354,433			349,161			352,227			348,945

The following table summarizes the data that is excluded from the computation of net income per common share or Common Unit as a result of being anti-dilutive (in thousands):

	Three Months Ended June 30,		Six Months Ended June 30,
	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	307	997
Outstanding participating securities	—	3,463	1,706	3,463

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Segment Reporting

6 Months Ended

Jun. 30, 2016

Segment Reporting [Abstract]

Segment Reporting

Segment Reporting

Reportable Segments

We had three reportable operating segments at June 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, for the three and six months endedJune 30, 2016 and 2015, respectively (in thousands): 

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Revenues
Rental Operations:
Industrial	$	140,219	$	135,487	$	283,199	$	283,115
Medical Office	43,135		40,274		85,360		80,302
Non-reportable Rental Operations	13,529		23,691		28,425		48,826
Service Operations	26,044		23,901		49,195		76,722
Total segment revenues	222,927		223,353		446,179		488,965
Other revenue	3,637		2,544		5,339		4,368
Consolidated revenue from continuing operations	226,564		225,897		451,518		493,333
Discontinued operations	126		49		355		32,164
Consolidated revenue	$	226,690	$	225,946	$	451,873	$	525,497

Supplemental Performance Measure

Property level net operating income on a cash basis ("PNOI") is the non-GAAP supplemental performance measure that we use to evaluate the performance of, and to allocate resources among, the real estate investments in the reportable and operating segments that comprise our Rental Operations. PNOI for our Rental Operations segments is comprised of rental revenues from continuing operations less rental expenses and real estate taxes from continuing operations, along with certain other adjusting items (collectively referred to as "Rental Operations revenues and expenses excluded from PNOI," as shown in the following table). Additionally, we do not allocate interest expense, depreciation expense and certain other non-property specific revenues and expenses (collectively referred to as "Non-Segment Items," as shown in the following table) to our individual operating segments.

We evaluate the performance of our Service Operations reportable segment using net income or loss, as allocated to that segment ("Earnings from Service Operations").

The following table shows a reconciliation of our segment-level measures of profitability to consolidated income from continuing operations before income taxes for the three and six months endedJune 30, 2016 and 2015, respectively (in thousands and excluding discontinued operations): 

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
PNOI
Industrial	$	104,741		$	96,629		$	206,798		$	191,588
Medical Office	28,179			25,820			55,421			51,051
Non-reportable Rental Operations	8,903			9,870			18,069			17,762
PNOI, excluding all sold/held for sale properties	141,823			132,319			280,288			260,401
PNOI from sold/held-for-sale properties included in continuing operations	629			8,545			2,994			22,735
PNOI, continuing operations	$	142,452		$	140,864		$	283,282		$	283,136
Earnings from Service Operations	3,816			2,163			6,047			7,960
Rental Operations revenues and expenses excluded from PNOI:
Straight-line rental income and expense, net	2,893			3,956			5,824			11,107
Revenues related to lease buyouts	69			94			234			958
Amortization of lease concessions and above and below market rents	(425		)	(490		)	(1,058		)	(2,203		)
Intercompany rents and other adjusting items	(226		)	(412		)	(219		)	(872		)
Non-Segment Items:
Equity in earnings of unconsolidated companies	3,534			15,123			25,394			21,369
Gain on dissolution of unconsolidated company	30,697			—			30,697			—
Promote income	24,087			—			24,087			—
Interest expense	(37,184		)	(42,976		)	(74,914		)	(92,567		)
Depreciation and amortization expense	(80,161		)	(78,334		)	(157,959		)	(160,237		)
Gain on sale of properties	39,314			107,410			54,891			130,894
Impairment charges on non-depreciable properties	(5,651		)	(5,470		)	(12,056		)	(5,470		)
Interest and other income, net	567			1,375			3,090			1,713
General and administrative expenses	(11,584		)	(19,238		)	(29,682		)	(36,242		)
Gain on land sales	707			17,012			837			22,437
Other operating expenses	(836		)	(1,555		)	(2,072		)	(3,112		)
Loss on extinguishment of debt	(2,430		)	(82,653		)	(2,430		)	(82,653		)
Acquisition-related activity	(72		)	(1,305		)	(75		)	(1,333		)
Other non-segment revenues and expenses, net	80			143			(323		)	(259		)
Income from continuing operations before income taxes	$	109,647		$	55,707		$	153,595		$	94,626

The most comparable GAAP measure to PNOI is income from continuing operations before income taxes. PNOI excludes expenses that materially impact our overall results of operations and, therefore, should not be considered as a substitute for income from continuing operations before income taxes or any other measures derived in accordance with GAAP. Furthermore, PNOI may not be comparable to other similarly titled measures of other companies.

Assets by Reportable Segment

The assets for each of the reportable segments at June 30, 2016 and December 31, 2015 were as follows (in thousands):

	June 30, 2016		December 31, 2015
Assets
Rental Operations:
Industrial	$	4,629,204	$	4,552,107
Medical Office	1,304,920		1,269,546
Non-reportable Rental Operations	313,195		367,469
Service Operations	132,622		137,257
Total segment assets	6,379,941		6,326,379
Non-segment assets	485,084		569,136
Consolidated assets	$	6,865,025	$	6,895,515

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Discontinued Operations and Assets Held for Sale

6 Months Ended

Jun. 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 June 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	9	91	101
Total properties sold or classified as held-for-sale	1	9	153	163

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 six months endedJune 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 for the three and six months endedJune 30, 2016 and 2015, respectively (in thousands):

	Three Months Ended June 30,					Six Months Ended June 30,
	2016		2015			2016		2015
Revenues	$	126	$	49		$	355	$	32,164
Operating expenses	1		(13		)	9		(12,399		)
Depreciation and amortization	—		—			—		(3,517		)
Operating income	127		36			364		16,248
Interest expense	—		—			—		(6,053		)
Income before gain on sales	127		36			364		10,195
Gain on sale of depreciable properties	252		399,354			166		417,729
Income from discontinued operations before income taxes	379		399,390			530		427,924
Income tax expense	—		(3,220		)	—		(3,220		)
Income from discontinued operations	$	379	$	396,170		$	530	$	424,704

We had no capital expenditures for the six months endedJune 30, 2016 and $7.4 million for the six months endedJune 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, for the three and six months endedJune 30, 2016 and 2015, respectively (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Income from continuing operations attributable to common shareholders	$	108,692	$	57,333	$	151,850	$	94,382
Income from discontinued operations attributable to common shareholders	375		392,047		524		420,242
Net income attributable to common shareholders	$	109,067	$	449,380	$	152,374	$	514,624

Allocation of Noncontrolling Interests - Partnership

Substantially all of the income from discontinued operations for all periods presented in the Partnership's Consolidated Statements of Operations and Comprehensive Income is attributable to the common unitholders.

Properties Held-for-Sale

At June 30, 2016, one in-service property and 16 acres of undeveloped land were classified as held-for-sale but did not meet the criteria to be classified within discontinued operations. The following table illustrates aggregate balance sheet information for all held-for-sale properties at June 30, 2016 and December 31, 2015 (in thousands):

	Held-for-Sale Properties Included in Continuing Operations
	June 30, 2016			December 31, 2015
Land and improvements	$	603		$	9,797
Buildings and tenant improvements	3,329			39,480
Undeveloped land	596			—
Accumulated depreciation	(1,437		)	(7,183		)
Deferred leasing and other costs, net	11			3,293
Other assets	360			414
Total assets held-for-sale	$	3,462		$	45,801
Accrued expenses	$	43		$	322
Other liabilities	602			650
Total liabilities held-for-sale	$	645		$	972

Impairment Charges

As the result of changes in our intended use or plans for sale of certain of our undeveloped land holdings, we recognized impairment charges of $12.1 million for the six months endedJune 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.

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Subsequent Events

6 Months Ended

Jun. 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 July 27, 2016:

Class of stock/units	Quarterly Amount per Share or Unit	Record Date	Payment Date
Common - Quarterly	$0.18	August 16, 2016	August 31, 2016

Debt Extinguishment

Subsequent to the tender offer described in Note 6, the remaining $203.0 million balance of our 5.95% notes due February 2017 were retired on July 23, 2016 for a cash payment of $209.0 million.

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Acquisitions and Dispositions (Tables)

6 Months Ended

Jun. 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:

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 six months ended June 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

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Indebtedness (Tables)

6 Months Ended

Jun. 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 for the six months endedJune 30, 2016 (in thousands):

	Book Value at 12/31/2015		Book Value at 6/30/2016		Fair Value at 12/31/2015		Issuances and Assumptions		Payments/Payoffs			Adjustments to Fair Value			Fair Value at 6/30/2016
Fixed rate secured debt	$	736,896	$	387,740	$	789,095	$	—	$	(348,702	)	$	(1,346	)	$	439,047
Variable rate secured debt	3,100		3,100		3,100		—		—			—			3,100
Unsecured debt	2,530,743		2,832,529		2,624,795		375,000		(73,214		)	80,343			3,006,924
Unsecured line of credit	71,000		—		70,852		—		(71,000		)	148			—
Total	$	3,341,739	$	3,223,369	$	3,487,842	$	375,000	$	(492,916	)	$	79,145		$	3,449,071
Less: Deferred financing costs	21,598		25,588
Total indebtedness as reported on the consolidated balance sheets	$	3,320,141	$	3,197,781

Unsecured Line of Credit

Our unsecured line of credit at June 30, 2016 is described as follows (in thousands):

Description	Maximum Capacity		Maturity Date	Outstanding Balance at June 30, 2016
Unsecured Line of Credit - Partnership	$	1,200,000	January 2019	$	—

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Related Party Transactions (Tables)

6 Months Ended

Jun. 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, for the three and six months endedJune 30, 2016 and 2015, respectively (in thousands): 

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2016		2015		2016		2015
Management fees	$	1,291	$	1,752	$	2,550	$	3,553
Leasing fees	1,053		389		1,432		1,022
Construction and development fees	2,239		725		5,359		1,130

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Net Income (Loss) Per Common Share (Tables)

6 Months Ended

Jun. 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 for the three and six months endedJune 30, 2016 and 2015, respectively (in thousands): 

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
General Partner
Net income attributable to common shareholders	$	109,067		$	449,380		$	152,374		$	514,624
Less: Dividends on participating securities	(582		)	(589		)	(1,171		)	(1,209		)
Basic net income attributable to common shareholders	108,485			448,791			151,203			513,415
Add back dividends on dilutive participating securities	582			—			569			—
Noncontrolling interest in earnings of common unitholders	1,101			4,762			1,539			5,461
Diluted net income attributable to common shareholders	$	110,168		$	453,553		$	153,311		$	518,876
Weighted average number of common shares outstanding	347,464			345,098			346,564			344,849
Weighted average Limited Partner Units outstanding	3,504			3,630			3,501			3,662
Other potential dilutive shares	3,465			433			2,162			434
Weighted average number of common shares and potential dilutive securities	354,433			349,161			352,227			348,945
Partnership
Net income attributable to common unitholders	$	110,168		$	454,142		$	153,913		$	520,085
Less: Distributions on participating securities	(582		)	(589		)	(1,171		)	(1,209		)
Basic net income attributable to common unitholders	$	109,586		$	453,553		$	152,742		$	518,876
Add back distributions on dilutive participating securities	582			—			569			—
Diluted net income attributable to common unitholders	$	110,168		$	453,553		$	153,311		$	518,876
Weighted average number of Common Units outstanding	350,968			348,728			350,065			348,511
Other potential dilutive units	3,465			433			2,162			434
Weighted average number of Common Units and potential dilutive securities	354,433			349,161			352,227			348,945

Computation of Anti-Dilutive Common Share

The following table summarizes the data that is excluded from the computation of net income per common share or Common Unit as a result of being anti-dilutive (in thousands):

	Three Months Ended June 30,		Six Months Ended June 30,
	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	307	997
Outstanding participating securities	—	3,463	1,706	3,463

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Segment Reporting (Tables)

6 Months Ended

Jun. 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, for the three and six months endedJune 30, 2016 and 2015, respectively (in thousands): 

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Revenues
Rental Operations:
Industrial	$	140,219	$	135,487	$	283,199	$	283,115
Medical Office	43,135		40,274		85,360		80,302
Non-reportable Rental Operations	13,529		23,691		28,425		48,826
Service Operations	26,044		23,901		49,195		76,722
Total segment revenues	222,927		223,353		446,179		488,965
Other revenue	3,637		2,544		5,339		4,368
Consolidated revenue from continuing operations	226,564		225,897		451,518		493,333
Discontinued operations	126		49		355		32,164
Consolidated revenue	$	226,690	$	225,946	$	451,873	$	525,497

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 for the three and six months endedJune 30, 2016 and 2015, respectively (in thousands and excluding discontinued operations): 

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
PNOI
Industrial	$	104,741		$	96,629		$	206,798		$	191,588
Medical Office	28,179			25,820			55,421			51,051
Non-reportable Rental Operations	8,903			9,870			18,069			17,762
PNOI, excluding all sold/held for sale properties	141,823			132,319			280,288			260,401
PNOI from sold/held-for-sale properties included in continuing operations	629			8,545			2,994			22,735
PNOI, continuing operations	$	142,452		$	140,864		$	283,282		$	283,136
Earnings from Service Operations	3,816			2,163			6,047			7,960
Rental Operations revenues and expenses excluded from PNOI:
Straight-line rental income and expense, net	2,893			3,956			5,824			11,107
Revenues related to lease buyouts	69			94			234			958
Amortization of lease concessions and above and below market rents	(425		)	(490		)	(1,058		)	(2,203		)
Intercompany rents and other adjusting items	(226		)	(412		)	(219		)	(872		)
Non-Segment Items:
Equity in earnings of unconsolidated companies	3,534			15,123			25,394			21,369
Gain on dissolution of unconsolidated company	30,697			—			30,697			—
Promote income	24,087			—			24,087			—
Interest expense	(37,184		)	(42,976		)	(74,914		)	(92,567		)
Depreciation and amortization expense	(80,161		)	(78,334		)	(157,959		)	(160,237		)
Gain on sale of properties	39,314			107,410			54,891			130,894
Impairment charges on non-depreciable properties	(5,651		)	(5,470		)	(12,056		)	(5,470		)
Interest and other income, net	567			1,375			3,090			1,713
General and administrative expenses	(11,584		)	(19,238		)	(29,682		)	(36,242		)
Gain on land sales	707			17,012			837			22,437
Other operating expenses	(836		)	(1,555		)	(2,072		)	(3,112		)
Loss on extinguishment of debt	(2,430		)	(82,653		)	(2,430		)	(82,653		)
Acquisition-related activity	(72		)	(1,305		)	(75		)	(1,333		)
Other non-segment revenues and expenses, net	80			143			(323		)	(259		)
Income from continuing operations before income taxes	$	109,647		$	55,707		$	153,595		$	94,626

Reportable Segments Consolidated Assets

The assets for each of the reportable segments at June 30, 2016 and December 31, 2015 were as follows (in thousands):

	June 30, 2016		December 31, 2015
Assets
Rental Operations:
Industrial	$	4,629,204	$	4,552,107
Medical Office	1,304,920		1,269,546
Non-reportable Rental Operations	313,195		367,469
Service Operations	132,622		137,257
Total segment assets	6,379,941		6,326,379
Non-segment assets	485,084		569,136
Consolidated assets	$	6,865,025	$	6,895,515

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Discontinued Operations and Assets Held for Sale (Tables)

6 Months Ended

Jun. 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 June 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	9	91	101
Total properties sold or classified as held-for-sale	1	9	153	163

Table Illustration of Discontinued Operations in Statement of Operations

The following table illustrates the operational results of the buildings reflected in discontinued operations for the three and six months endedJune 30, 2016 and 2015, respectively (in thousands):

	Three Months Ended June 30,					Six Months Ended June 30,
	2016		2015			2016		2015
Revenues	$	126	$	49		$	355	$	32,164
Operating expenses	1		(13		)	9		(12,399		)
Depreciation and amortization	—		—			—		(3,517		)
Operating income	127		36			364		16,248
Interest expense	—		—			—		(6,053		)
Income before gain on sales	127		36			364		10,195
Gain on sale of depreciable properties	252		399,354			166		417,729
Income from discontinued operations before income taxes	379		399,390			530		427,924
Income tax expense	—		(3,220		)	—		(3,220		)
Income from discontinued operations	$	379	$	396,170		$	530	$	424,704

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, for the three and six months endedJune 30, 2016 and 2015, respectively (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Income from continuing operations attributable to common shareholders	$	108,692	$	57,333	$	151,850	$	94,382
Income from discontinued operations attributable to common shareholders	375		392,047		524		420,242
Net income attributable to common shareholders	$	109,067	$	449,380	$	152,374	$	514,624

Schedule of Discontinued Operations, Properties Held-for-Sale, Aggregate Balance Sheet Information [Table Text Block]

The following table illustrates aggregate balance sheet information for all held-for-sale properties at June 30, 2016 and December 31, 2015 (in thousands):

	Held-for-Sale Properties Included in Continuing Operations
	June 30, 2016			December 31, 2015
Land and improvements	$	603		$	9,797
Buildings and tenant improvements	3,329			39,480
Undeveloped land	596			—
Accumulated depreciation	(1,437		)	(7,183		)
Deferred leasing and other costs, net	11			3,293
Other assets	360			414
Total assets held-for-sale	$	3,462		$	45,801
Accrued expenses	$	43		$	322
Other liabilities	602			650
Total liabilities held-for-sale	$	645		$	972

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Subsequent Events (Tables)

6 Months Ended

Jun. 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 July 27, 2016:

Class of stock/units	Quarterly Amount per Share or Unit	Record Date	Payment Date
Common - Quarterly	$0.18	August 16, 2016	August 31, 2016

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General Basis of Presentation (Details)	6 Months Ended
	Jun. 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%

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Variable Interest Entities (Balances Related to Joint Ventures) (Details) $ in Millions	Jun. 30, 2016 USD ($)
Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]
Maximum Guarantee Exposure for Joint Venture Loans	$ 75.5

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Acquisitions and Dispositions (Narrative) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($) buildings	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) buildings	Jun. 30, 2015 USD ($)
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	$ 200,520,000	$ 201,996,000	$ 402,323,000	$ 416,611,000
Operating Income (Loss)	148,766,000	181,266,000	227,924,000	269,466,000
Property, Plant, and Equipment, Fair Value Disclosure	72,824,000		72,824,000
Gain on dissolution of unconsolidated company	30,697,000	0	30,697,000	0
Promote income	$ 24,087,000	$ 0	$ 24,087,000	$ 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			364,000
Operating Income (Loss)			$ 89,000
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%

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Acquisitions and Dispositions (Summary of Allocation of Fair Value of Amounts Recognized) (Details) $ in Thousands	Jun. 30, 2016 USD ($)
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

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Acquisitions and Dispositions (Summary of Significant Assumptions Utilized in Estimates) (Details)	6 Months Ended
	Jun. 30, 2016 $ / sqft months
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

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Acquisitions and Dispositions Dispositions (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Dispositions Disclosures [Line Items]
Proceeds from Sale of Real Estate Held-for-investment	$ 174,882	$ 1,305,794

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Indebtedness (Summary of Book Value and Changes in Fair Value of Debt) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Book value	$ 3,197,781	$ 3,320,141
Fair value	3,449,071	3,487,842
Issuances and Assumptions	375,000
Payments/Payoffs	(492,916)
Adjustments to fair value	79,145
Long-term Debt, Gross	3,223,369	3,341,739
Deferred Finance Costs, Net	(25,588)	(21,598)
Fixed Rate Secured Debt [Member]
Book value	387,740	736,896
Fair value	439,047	789,095
Issuances and Assumptions	0
Payments/Payoffs	(348,702)
Adjustments to fair value	(1,346)
Variable Rate Secured Debt [Member]
Book value	3,100	3,100
Fair value	3,100	3,100
Issuances and Assumptions	0
Payments/Payoffs	0
Adjustments to fair value	0
Unsecured Debt [Member]
Book value	2,832,529	2,530,743
Fair value	3,006,924	2,624,795
Issuances and Assumptions	375,000
Payments/Payoffs	(73,214)
Adjustments to fair value	80,343
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

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Indebtedness Secured Debt (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($) loans	Jun. 30, 2015 USD ($)
Debt Instrument [Line Items]
Repayments of Secured Debt	$ 348,743	$ 207,169
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	3.10%
Repayments of Secured Debt	$ 344,700
number of secured loans repaid | loans	4
Debt Instrument, Interest Rate, Stated Percentage	5.90%

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Indebtedness Unsecured Debt (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($) loans	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	5.95%
Repayments of Unsecured Debt	$ 75,668	$ 759,354
Number of Variable Rate Unsecured Loans | loans	1
Proceeds from Issuance of Unsecured Debt	$ 375,000	$ 0
Long-term Debt	$ 3,197,781		$ 3,320,141
Debt Instrument, Interest Rate, Effective Percentage	3.36%
Debt Instrument, Repurchased Face Amount	$ 72,000
Debt Instrument, Interest Rate, Stated Percentage	3.25%
Variable Rate UnSecured Debt [Member] [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 250,000
Debt Instrument, Interest Rate, Effective Percentage	1.60%
Fixed Rate Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Estimated Trading Values, Percent of Face Value, Minimum	101.00%
Debt Instrument, Estimated Trading Values, Percent of Face Value, Maximum	133.00%
Debt Instrument, Covenant Compliance	We were in compliance with all such covenants at June 30, 2016
Unsecured Debt [Member]
Debt Instrument [Line Items]
Repayments of Unsecured Debt	$ 74,500
Proceeds from Issuance of Unsecured Debt	375,000
Long-term Debt	$ 2,832,529		$ 2,530,743

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Indebtedness (Unsecured Line of Credit) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 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. 01, 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. 01, 2020

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Shareholders' Equity Shareholders' Equity (Details) - USD ($) $ in Thousands, shares in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Class of Stock [Line Items]
Proceeds from Issuance of Common Stock	$ 99,844	$ 4,756
At-the-market equity issuance [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, New Issues	4.2
Proceeds from Issuance of Common Stock	$ 98,500
Gross Proceeds [Member] | At-the-market equity issuance [Member]
Class of Stock [Line Items]
Proceeds from Issuance of Common Stock	$ 99,600

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Related Party Transactions (Schedule of Fees Earned from Related Parties) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Management Fees [Member]
Revenue from related party transactions	$ 1,291	$ 1,752	$ 2,550	$ 3,553
Leasing Fees [Member]
Revenue from related party transactions	1,053	389	1,432	1,022
Construction and Development Fees [Member]
Revenue from related party transactions	$ 2,239	$ 725	$ 5,359	$ 1,130

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Net Income (Loss) Per Common Share Reconciling the Components of Basic and Diluted Net Income (Loss) per Common Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income attributable to common shareholders	$ 109,067	$ 449,380	$ 152,374	$ 514,624
Less: Dividends on participating securities	(582)	(589)	(1,171)	(1,209)
Basic net income attributable to common shareholders	108,485	448,791	151,203	513,415
Participating Securities, Distributed and Undistributed Earnings (Loss), Diluted	582	0	569	0
Noncontrolling Interest in Net Income (Loss) Operating Partnerships, Redeemable	1,101	4,762	1,539	5,461
Diluted net income attributable to common shareholders	$ 110,168	$ 453,553	$ 153,311	$ 518,876
Weighted average number of common shares/units outstanding, Basic	347,464	345,098	346,564	344,849
Weighted Average Limited Partnership Units Outstanding, Basic	3,504	3,630	3,501	3,662
Other potential dilutive shares/units	3,465	433	2,162	434
Weighted average number of common shares/units and potential dilutive securities	354,433	349,161	352,227	348,945
Duke Realty Limited Partnership [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income attributable to common shareholders	$ 110,168	$ 454,142	$ 153,913	$ 520,085
Less: Dividends on participating securities	(582)	(589)	(1,171)	(1,209)
Basic net income attributable to common unitholders	109,586	453,553	152,742	518,876
Participating Securities, Distributed and Undistributed Earnings (Loss), Diluted	582	0	569	0
Diluted Net Income Loss Attributable To Common Unitholders	$ 110,168	$ 453,553	$ 153,311	$ 518,876
Weighted average number of common shares/units outstanding, Basic	350,968	348,728	350,065	348,511
Other potential dilutive shares/units	3,465	433	2,162	434
Weighted average number of common shares/units and potential dilutive securities	354,433	349,161	352,227	348,945

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Net Income (Loss) Per Common Share (Computation of Anti-Dilutive Common Shares) (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities	170	997	307	997
Participating Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities	0	3,463	1,706	3,463

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Segment Reporting Summary of Revenues (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)
Segment Reporting, Revenue Reconciling Item [Line Items]
Number of Reportable Segments			3
Rental and related revenue	$ 200,520	$ 201,996	$ 402,323	$ 416,611
General contractor and service fee revenue	26,044	23,901	49,195	76,722
Revenues	226,564	225,897	451,518	493,333
Disposal Group, Including Discontinued Operation, Revenue	126	49	355	32,164
Total Revenues Including Revenues Related To Discontinued Operations	226,690	225,946	451,873	525,497
Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	222,927	223,353	446,179	488,965
Operating Segments [Member] | Industrial [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Rental and related revenue	140,219	135,487	283,199	283,115
Operating Segments [Member] | Medical Office [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Rental and related revenue	43,135	40,274	85,360	80,302
Operating Segments [Member] | All Other Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Rental and related revenue	13,529	23,691	28,425	48,826
Operating Segments [Member] | Service Operations [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
General contractor and service fee revenue	26,044	23,901	49,195	76,722
Corporate, Non-Segment [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Rental and related revenue	3,637	2,544	5,339	4,368
Disposal Group, Including Discontinued Operation, Revenue	$ 126	$ 49	$ 355	$ 32,164

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Segment Reporting (Summary of Net Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Straight line rental income and expenses, net			$ 5,768	$ 12,775
Income from Equity Method Investments	$ 3,534	$ 15,123	25,394	21,369
Gain on dissolution of unconsolidated company	30,697	0	30,697	0
Promote income	24,087	0	24,087	0
Interest expense	(37,184)	(42,976)	(74,914)	(92,567)
Depreciation and amortization on continuing operations	(80,161)	(78,334)	(157,959)	(160,237)
Gain on sale of properties	39,314	107,410	54,891	130,894
Impairment Charges	(5,651)	(5,470)	(12,056)	(5,470)
Interest and other income, net	567	1,375	3,090	1,713
General and administrative expenses	(11,584)	(19,238)	(29,682)	(36,242)
Gain on land sales	707	17,012	837	22,437
Other operating expenses	(836)	(1,555)	(2,072)	(3,112)
Gains (Losses) on Extinguishment of Debt	(2,430)	(82,653)	(2,430)	(82,653)
Acquisition-related activity	(72)	(1,305)	(75)	(1,333)
Income from continuing operations before income taxes	109,647	55,707	153,595	94,626
Operating Segments [Member]
Property Level Net Operating Income – Cash Basis	141,823	132,319	280,288	260,401
Property Level Net Income, Cash Basis, Continuing Operations	142,452	140,864	283,282	283,136
Operating Segments [Member] | Industrial [Member]
Property Level Net Operating Income – Cash Basis	104,741	96,629	206,798	191,588
Operating Segments [Member] | Medical Office [Member]
Property Level Net Operating Income – Cash Basis	28,179	25,820	55,421	51,051
Operating Segments [Member] | All Other Segments [Member]
Property Level Net Operating Income – Cash Basis	8,903	9,870	18,069	17,762
Operating Segments [Member] | Service Operations [Member]
Service Operations Net Income (loss)	3,816	2,163	6,047	7,960
Segment Reconciling Items [Member]
Sold Properties Included in Continuing Operations Net Operating Income	629	8,545	2,994	22,735
Straight line rental income and expenses, net	2,893	3,956	5,824	11,107
Revenues Related to Lease Buyouts	69	94	234	958
Amortization of lease incentives and market rents	(425)	(490)	(1,058)	(2,203)
Intercompany rents and other adjusting items	(226)	(412)	(219)	(872)
Corporate, Non-Segment [Member]
Income from Equity Method Investments	3,534	15,123	25,394	21,369
Gain on dissolution of unconsolidated company	30,697	0	30,697	0
Promote income	24,087	0	24,087	0
Interest expense	(37,184)	(42,976)	(74,914)	(92,567)
Depreciation and amortization on continuing operations	(80,161)	(78,334)	(157,959)	(160,237)
Gain on sale of properties	39,314	107,410	54,891	130,894
Impairment Charges	(5,651)	(5,470)	(12,056)	(5,470)
Interest and other income, net	567	1,375	3,090	1,713
General and administrative expenses	(11,584)	(19,238)	(29,682)	(36,242)
Gain on land sales	707	17,012	837	22,437
Other operating expenses	(836)	(1,555)	(2,072)	(3,112)
Gains (Losses) on Extinguishment of Debt	(2,430)	(82,653)	(2,430)	(82,653)
Acquisition-related activity	(72)	(1,305)	(75)	(1,333)
Other non-segment income	$ 80	$ 143	$ (323)	$ (259)

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Segment Reporting (Reportable Segments Consolidated Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Total Assets	$ 6,865,025	$ 6,895,515
Corporate, Non-Segment [Member]
Total Assets	485,084	569,136
Operating Segments [Member]
Total Assets	6,379,941	6,326,379
Operating Segments [Member] | Industrial [Member]
Total Assets	4,629,204	4,552,107
Operating Segments [Member] | Medical Office [Member]
Total Assets	1,304,920	1,269,546
Operating Segments [Member] | All Other Segments [Member]
Total Assets	313,195	367,469
Operating Segments [Member] | Service Operations [Member]
Total Assets	$ 132,622	$ 137,257

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Discontinued Operations and Assets Held for Sale (Table Illustration of Number of Properties in Discontinued Operations) (Details) - buildings	6 Months Ended	12 Months Ended
	Jun. 30, 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	9	91
Continuing Operations, Number of Real Estate Properties Sold or Classified as Held for Sale	101
Number of Real Estate Properties Held for Sale	1
Number of Real Estate Properties Sold	9	153
Total Properties Sold or Classified as Held for Sale	163
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

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Discontinued Operations and Assets Held for Sale (Table Illustration of Discontinued Operations in Income Statement) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Discontinued Operations
Revenues	$ 126	$ 49	$ 355	$ 32,164
Operating Expenses	1	(13)	9	(12,399)
Depreciation and amortization, discontinued operations	0	0	0	(3,517)
Operating Income (Loss)	127	36	364	16,248
Interest Expense	0	0	0	(6,053)
Income before gain on sales	127	36	364	10,195
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	252	399,354	166	417,729
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	379	399,390	530	427,924
Discontinued Operation, Tax Effect of Discontinued Operation	0	(3,220)	0	(3,220)
Income from discontinued operations	$ 379	$ 396,170	530	424,704
Payments For Second Generation Tenant Improvements Leasing Costs And Building Improvements			$ 30,237	30,871
Discontinued Operations [Member]
Discontinued Operations
Payments For Second Generation Tenant Improvements Leasing Costs And Building Improvements				$ 7,400

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Discontinued Operations and Assets Held for Sale (Allocation of Shareholders' Income (Loss) Between Continuing and Discontinued Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Discontinued Operations
Income (loss) from continuing operations attributable to common shareholders	$ 108,692	$ 57,333	$ 151,850	$ 94,382
Income (loss) from discontinued operations attributable to common shareholders	375	392,047	524	420,242
Net income attributable to common shareholders	$ 109,067	$ 449,380	$ 152,374	$ 514,624

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Discontinued Operations and Assets Held for Sale (Aggregate Balance Sheet of Properties Held for Sale Included in Discontinued Operations) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($) a buildings	Dec. 31, 2015 USD ($)
Held for Sale Assets in Continuing and Discontinued Operations
Total assets held-for-sale	$ 3,462	$ 45,801
Total liabilities held-for-sale	$ 645	972
Continuing Operations, Number of In-service Properties Held for Sale | buildings	1
Area of Land | a	16
Continuing Operations [Member]
Held for Sale Assets in Continuing and Discontinued Operations
Land and Land Improvements Held-for-Sale	$ 603	9,797
Buildings and Tenant Improvements Held-for-Sale	3,329	39,480
Inventory, Land Held-for-sale	596	0
Accumulated Depreciation of Assets Held-for-Sale	(1,437)	(7,183)
Lease Related Assets, Held for Sale	11	3,293
Other assets	360	414
Total assets held-for-sale	3,462	45,801
Accrued expenses	43	322
Other liabilities	602	650
Total liabilities held-for-sale	$ 645	$ 972

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Discontinued Operations and Assets Held for Sale Impairment (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($) a	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) a	Jun. 30, 2015 USD ($)
Acres of Land with Impairment Charge | a	174		174
Asset Impairment Charges	$ 5,651	$ 5,470	$ 12,056	$ 5,470
Land [Member]
Asset Impairment Charges			$ 12,056

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Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Jun. 30, 2015
Subsequent Event [Line Items]
Debt Instrument, Repurchased Face Amount		$ 72,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		5.95%
Repayments of Unsecured Debt		$ 75,668	$ 759,354
Subsequent Event [Member]
Subsequent Event [Line Items]
Debt Instrument, Repurchased Face Amount	$ 203,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	5.95%
Repayments of Unsecured Debt	$ 209,000
Subsequent Event [Member] | Common Stock [Member]
Subsequent Event [Line Items]
Common stock dividends declared per share	$ 0.18
Record date	Aug. 16, 2016
Payment date	Aug. 31, 2016