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 March 31, 2018

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, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth 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 Emerging growth company  o

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Duke Realty Limited Partnership:

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

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. 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 May 3, 2018
Common Stock 0.01 par value per share	357,030,140

EXPLANATORY NOTE

This report (the "Report") combines the quarterly reports on Form 10-Q for the period ended March 31, 2018 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 99.1% of the common partnership interests of the Partnership ("General Partner Units") as of March 31, 2018. The remaining 0.9% 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 - March 31, 2018 (Unaudited) and December 31, 2017	3
		Consolidated Statements of Operations and Comprehensive Income (Unaudited) - Three Months Ended March 31, 2018 and 2017	4
		Consolidated Statements of Cash Flows (Unaudited) - Three Months Ended March 31, 2018 and 2017	5
		Consolidated Statement of Changes in Equity (Unaudited) - Three Months Ended March 31, 2018	6
	Duke Realty Limited Partnership:
		Consolidated Balance Sheets - March 31, 2018 (Unaudited) and December 31, 2017	7
		Consolidated Statements of Operations and Comprehensive Income (Unaudited) - Three Months Ended March 31, 2018 and 2017	8
		Consolidated Statements of Cash Flows (Unaudited) - Three Months Ended March 31, 2018 and 2017	9
		Consolidated Statement of Changes in Equity (Unaudited) - Three Months Ended March 31, 2018	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	24
Item 3.		Quantitative and Qualitative Disclosures About Market Risk	41
Item 4.		Controls and Procedures	43
Part II - Other Information
Item 1.		Legal Proceedings	44
Item 1A.		Risk Factors	44
Item 2.		Unregistered Sales of Equity Securities and Use of Proceeds	44
Item 3.		Defaults Upon Senior Securities	44
Item 4.		Mine Safety Disclosures	44
Item 5.		Other Information	44
Item 6.		Exhibits	45

2

PART I - FINANCIAL INFORMATION

Item 1. Financial Statements

DUKE REALTY CORPORATION AND SUBSIDIARIES

Consolidated Balance Sheets

(in thousands, except per share amounts)

	March 31, 2018			December 31, 2017
	(Unaudited)
ASSETS
Real estate investments:
Real estate assets	$	6,608,594		$	6,593,567
Construction in progress	441,484			401,407
Investments in and advances to unconsolidated joint ventures	121,576			126,487
Undeveloped land	259,842			226,987
	7,431,496			7,348,448
Accumulated depreciation	(1,238,688		)	(1,193,905		)
Net real estate investments	6,192,808			6,154,543
Real estate investments and other assets held-for-sale	21,740			17,550
Cash and cash equivalents	160,861			67,562
Accounts receivable, net of allowance of $1,626 and $1,709	21,939			19,427
Straight-line rent receivable, net of allowance of $6,104 and $5,254	97,266			93,005
Receivables on construction contracts, including retentions	16,692			13,480
Deferred leasing and other costs, net of accumulated amortization of $208,092 and $209,451	297,103			292,682
Restricted cash held in escrow for like-kind exchange	59,196			116,405
Notes receivable from property sales	386,789			426,657
Other escrow deposits and other assets	173,280			186,885
	$	7,427,674		$	7,388,196
LIABILITIES AND EQUITY
Indebtedness:
Secured debt, net of deferred financing costs of $529 and $614	$	310,070		$	311,349
Unsecured debt, net of deferred financing costs of $20,000 and $20,500	2,111,386			2,111,542
Unsecured line of credit	75,000			—
	2,496,456			2,422,891
Liabilities related to real estate investments held-for-sale	1,327			1,163
Construction payables and amounts due subcontractors, including retentions	53,339			54,545
Accrued real estate taxes	71,234			67,374
Accrued interest	27,166			17,911
Other liabilities	152,358			210,825
Tenant security deposits and prepaid rents	44,610			39,109
Total liabilities	2,846,490			2,813,818
Shareholders' equity:
Common shares ($0.01 par value); 600,000 shares authorized; 357,025 and 356,361 shares issued and outstanding, respectively	3,570			3,564
Additional paid-in capital	5,204,855			5,205,316
Distributions in excess of net income	(674,920		)	(676,036		)
Total shareholders' equity	4,533,505			4,532,844
Noncontrolling interests	47,679			41,534
Total equity	4,581,184			4,574,378
	$	7,427,674		$	7,388,196

See accompanying Notes to Consolidated Financial Statements

3

DUKE REALTY CORPORATION AND SUBSIDIARIES

Consolidated Statements of Operations and Comprehensive Income

For the three months ended March 31,

(in thousands, except per share amounts)

(Unaudited)

	2018			2017
Revenues:
Rental and related revenue	$	193,456		$	171,676
General contractor and service fee revenue	41,101			9,399
	234,557			181,075
Expenses:
Rental expenses	20,396			16,237
Real estate taxes	31,146			26,511
General contractor and other services expenses	40,409			7,624
Depreciation and amortization	77,529			62,023
	169,480			112,395
Other operating activities:
Equity in earnings of unconsolidated joint ventures	8,287			4,749
Gain on sale of properties	44,886			37,046
Gain on land sales	2,949			1,505
Other operating expenses	(786		)	(738		)
Impairment charges	—			(859		)
General and administrative expenses	(21,023		)	(19,232		)
	34,313			22,471
Operating income	99,390			91,151
Other income (expenses):
Interest and other income, net	4,463			533
Interest expense	(20,000		)	(24,162		)
Gain on debt extinguishment	—			25
Income from continuing operations before income taxes	83,853			67,547
Income tax expense	(10,329		)	(2,132		)
Income from continuing operations	73,524			65,415
Discontinued operations:
(Loss) income before gain on sales	(8		)	5,366
Gain on sale of depreciable properties	132			—
Income from discontinued operations	124			5,366
Net income	73,648			70,781
Net income attributable to noncontrolling interests	(685		)	(581		)
Net income attributable to common shareholders	$	72,963		$	70,200
Basic net income per common share:
Continuing operations attributable to common shareholders	$	0.20		$	0.18
Discontinued operations attributable to common shareholders	—			0.02
Total	$	0.20		$	0.20
Diluted net income per common share:
Continuing operations attributable to common shareholders	$	0.20		$	0.18
Discontinued operations attributable to common shareholders	—			0.02
Total	$	0.20		$	0.20
Weighted average number of common shares outstanding	356,740			355,282
Weighted average number of common shares and potential dilutive securities	360,400			360,700
Comprehensive income:
Net income	$	73,648		$	70,781
Other comprehensive loss:
Amortization of interest contracts	—			(256		)
Comprehensive income	$	73,648		$	70,525

See accompanying Notes to Consolidated Financial Statements

4

DUKE REALTY CORPORATION AND SUBSIDIARIES

Consolidated Statements of Cash Flows

For the three months ended March 31,

(in thousands)

(Unaudited)

	2018			2017
Cash flows from operating activities:
Net income	$	73,648		$	70,781
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	63,944			66,172
Amortization of deferred leasing and other costs	13,585			15,385
Amortization of deferred financing costs	1,418			1,316
Straight-line rental income and expense, net	(6,288		)	(2,928		)
Impairment charges	—			859
Gain on debt extinguishment	—			(25		)
Gains on land and depreciated property sales	(47,967		)	(38,551		)
Third-party construction contracts, net	(367		)	714
Other accrued revenues and expenses, net	19,862			(3,733		)
Equity in earnings in excess of operating distributions received from unconsolidated joint ventures	(4,673		)	(282		)
Net cash provided by operating activities	113,162			109,708
Cash flows from investing activities:
Development of real estate investments	(104,346		)	(112,727		)
Acquisition of real estate investments and related intangible assets	(22,801		)	(114,369		)
Acquisition of undeveloped land	(67,256		)	(50,436		)
Second generation tenant improvements, leasing costs and building improvements	(14,102		)	(10,431		)
Other deferred leasing costs	(9,798		)	(4,398		)
Other assets	39,183			(4,186		)
Proceeds from land and depreciated property sales, net	131,380			103,120
Capital distributions from unconsolidated joint ventures	9,404			4,858
Capital contributions and advances to unconsolidated joint ventures	—			(297		)
Net cash used for investing activities	(38,336		)	(188,866		)
Cash flows from financing activities:
Proceeds from issuance of common shares, net	706			786
Payments on unsecured debt	(656		)	(616		)
Payments on secured indebtedness including principal amortization	(1,345		)	(17,539		)
Borrowings on line of credit, net	75,000			189,000
Distributions to common shareholders	(71,398		)	(67,554		)
Distributions to noncontrolling interests	(680		)	(640		)
Tax payments on stock-based compensation awards	(7,984		)	(8,848		)
Change in book cash overdrafts	(33,448		)	7,115
Deferred financing costs	(285		)	(7		)
Net cash (used for) provided by financing activities	(40,090		)	101,697
Net increase in cash, cash equivalents and restricted cash	34,736			22,539
Cash, cash equivalents and restricted cash at beginning of period	193,627			57,038
Cash, cash equivalents and restricted cash at end of period	$	228,363		$	79,577
Non-cash investing and financing activities:
Conversion of Limited Partner Units to common shares	$	—		$	1,685

See accompanying Notes to Consolidated Financial Statements

5

DUKE REALTY CORPORATION AND SUBSIDIARIES

Consolidated Statement of Changes in Equity

For the three months ended March 31, 2018

(in thousands, except per share data)

(Unaudited)

	Common Shareholders
		Common Stock		Additional Paid-in Capital			Distributions in Excess of Net Income			Noncontrolling Interests			Total
Balance at December 31, 2017		$	3,564	$	5,205,316		$	(676,036	)	$	41,534		$	4,574,378
Net income		—		—			72,963			685			73,648
Issuance of common shares		—		706			—			—			706
Stock-based compensation plan activity		6		(1,167		)	(449		)	6,140			4,530
Distributions to common shareholders ($0.20 per share)		—		—			(71,398		)	—			(71,398		)
Distributions to noncontrolling interests		—		—			—			(680		)	(680		)
Balance at March 31, 2018		$	3,570	$	5,204,855		$	(674,920	)	$	47,679		$	4,581,184

See accompanying Notes to Consolidated Financial Statements

6

DUKE REALTY LIMITED PARTNERSHIP AND SUBSIDIARIES

Consolidated Balance Sheets

(in thousands)

	March 31, 2018			December 31, 2017
	(Unaudited)
ASSETS
Real estate investments:
Real estate assets	$	6,608,594		$	6,593,567
Construction in progress	441,484			401,407
Investments in and advances to unconsolidated joint ventures	121,576			126,487
Undeveloped land	259,842			226,987
	7,431,496			7,348,448
Accumulated depreciation	(1,238,688		)	(1,193,905		)
Net real estate investments	6,192,808			6,154,543
Real estate investments and other assets held-for-sale	21,740			17,550
Cash and cash equivalents	160,861			67,562
Accounts receivable, net of allowance of $1,626 and $1,709	21,939			19,427
Straight-line rent receivable, net of allowance of $6,104 and $5,254	97,266			93,005
Receivables on construction contracts, including retentions	16,692			13,480
Deferred leasing and other costs, net of accumulated amortization of $208,092 and $209,451	297,103			292,682
Restricted cash held in escrow for like-kind exchange	59,196			116,405
Notes receivable from property sales	386,789			426,657
Other escrow deposits and other assets	173,280			186,885
	$	7,427,674		$	7,388,196
LIABILITIES AND EQUITY
Indebtedness:
Secured debt, net of deferred financing costs of $529 and $614	$	310,070		$	311,349
Unsecured debt, net of deferred financing costs of $20,000 and $20,500	2,111,386			2,111,542
Unsecured line of credit	75,000			—
	2,496,456			2,422,891
Liabilities related to real estate investments held-for-sale	1,327			1,163
Construction payables and amounts due subcontractors, including retentions	53,339			54,545
Accrued real estate taxes	71,234			67,374
Accrued interest	27,166			17,911
Other liabilities	152,358			210,825
Tenant security deposits and prepaid rents	44,610			39,109
Total liabilities	2,846,490			2,813,818
Partners' equity:
Common equity (357,025 and 356,361 General Partner Units issued and outstanding, respectively)	4,533,505			4,532,844
Limited Partners' common equity (3,402 and 3,283 Limited Partner Units issued and outstanding, respectively)	46,706			40,563
Total partners' equity	4,580,211			4,573,407
Noncontrolling interests	973			971
Total equity	4,581,184			4,574,378
	$	7,427,674		$	7,388,196

See accompanying Notes to Consolidated Financial Statements

7

DUKE REALTY LIMITED PARTNERSHIP AND SUBSIDIARIES

Consolidated Statements of Operations and Comprehensive Income

For the three months ended March 31,

(in thousands, except per unit amounts)

(Unaudited)

	2018			2017
Revenues:
Rental and related revenue	$	193,456		$	171,676
General contractor and service fee revenue	41,101			9,399
	234,557			181,075
Expenses:
Rental expenses	20,396			16,237
Real estate taxes	31,146			26,511
General contractor and other services expenses	40,409			7,624
Depreciation and amortization	77,529			62,023
	169,480			112,395
Other operating activities:
Equity in earnings of unconsolidated joint ventures	8,287			4,749
Gain on sale of properties	44,886			37,046
Gain on land sales	2,949			1,505
Other operating expenses	(786		)	(738		)
Impairment charges	—			(859		)
General and administrative expenses	(21,023		)	(19,232		)
	34,313			22,471
Operating income	99,390			91,151
Other income (expenses):
Interest and other income, net	4,463			533
Interest expense	(20,000		)	(24,162		)
Gain on debt extinguishment	—			25
Income from continuing operations before income taxes	83,853			67,547
Income tax expense	(10,329		)	(2,132		)
Income from continuing operations	73,524			65,415
Discontinued operations:
(Loss) income before gain on sales	(8		)	5,366
Gain on sale of depreciable properties	132			—
Income from discontinued operations	124			5,366
Net income	73,648			70,781
Net (income) loss attributable to noncontrolling interests	(2		)	71
Net income attributable to common unitholders	$	73,646		$	70,852
Basic net income per Common Unit:
Continuing operations attributable to common unitholders	$	0.20		$	0.18
Discontinued operations attributable to common unitholders	—			0.02
Total	$	0.20		$	0.20
Diluted net income per Common Unit:
Continuing operations attributable to common unitholders	$	0.20		$	0.18
Discontinued operations attributable to common unitholders	—			0.02
Total	$	0.20		$	0.20
Weighted average number of Common Units outstanding	360,095			358,598
Weighted average number of Common Units and potential dilutive securities	360,400			360,700
Comprehensive income:
Net income	$	73,648		$	70,781
Other comprehensive loss:
Amortization of interest contracts	—			(256		)
Comprehensive income	$	73,648		$	70,525

See accompanying Notes to Consolidated Financial Statements

8

DUKE REALTY LIMITED PARTNERSHIP AND SUBSIDIARIES

Consolidated Statements of Cash Flows

For the three months ended March 31,

(in thousands)

(Unaudited)

	2018			2017
Cash flows from operating activities:
Net income	$	73,648		$	70,781
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	63,944			66,172
Amortization of deferred leasing and other costs	13,585			15,385
Amortization of deferred financing costs	1,418			1,316
Straight-line rental income and expense, net	(6,288		)	(2,928		)
Impairment charges	—			859
Gain on debt extinguishment	—			(25		)
Gains on land and depreciated property sales	(47,967		)	(38,551		)
Third-party construction contracts, net	(367		)	714
Other accrued revenues and expenses, net	19,862			(3,733		)
Equity in earnings in excess of operating distributions received from unconsolidated joint ventures	(4,673		)	(282		)
Net cash provided by operating activities	113,162			109,708
Cash flows from investing activities:
Development of real estate investments	(104,346		)	(112,727		)
Acquisition of real estate investments and related intangible assets	(22,801		)	(114,369		)
Acquisition of undeveloped land	(67,256		)	(50,436		)
Second generation tenant improvements, leasing costs and building improvements	(14,102		)	(10,431		)
Other deferred leasing costs	(9,798		)	(4,398		)
Other assets	39,183			(4,186		)
Proceeds from land and depreciated property sales, net	131,380			103,120
Capital distributions from unconsolidated joint ventures	9,404			4,858
Capital contributions and advances to unconsolidated joint ventures	—			(297		)
Net cash used for investing activities	(38,336		)	(188,866		)
Cash flows from financing activities:
Contributions from the General Partner	706			786
Payments on unsecured debt	(656		)	(616		)
Payments on secured indebtedness including principal amortization	(1,345		)	(17,539		)
Borrowings on line of credit, net	75,000			189,000
Distributions to common unitholders	(72,078		)	(68,184		)
Distributions to noncontrolling interests	—			(10		)
Tax payments on stock-based compensation awards	(7,984		)	(8,848		)
Change in book cash overdrafts	(33,448		)	7,115
Deferred financing costs	(285		)	(7		)
Net cash (used for) provided by financing activities	(40,090		)	101,697
Net increase in cash, cash equivalents and restricted cash	34,736			22,539
Cash, cash equivalents and restricted cash at beginning of period	193,627			57,038
Cash, cash equivalents and restricted cash at end of period	$	228,363		$	79,577
Non-cash investing and financing activities:
Conversion of Limited Partner Units to common shares of the General Partner	$	—		$	1,685

See accompanying Notes to Consolidated Financial Statements

9

DUKE REALTY LIMITED PARTNERSHIP AND SUBSIDIARIES

Consolidated Statement of Changes in Equity

For the three months ended March 31, 2018

(in thousands, except per unit data)

(Unaudited)

	Common Unitholders
	General			Limited
	Partner's			Partners'			Total
	Common Equity			Common Equity			Partners' Equity			Noncontrolling Interests		Total Equity
Balance at December 31, 2017	$	4,532,844		$	40,563		$	4,573,407		$	971	$	4,574,378
Net income	72,963			683			73,646			2		73,648
Capital contribution from the General Partner	706			—			706			—		706
Stock-based compensation plan activity	(1,610		)	6,140			4,530			—		4,530
Distributions to common unitholders ($0.20 per Common Unit)	(71,398		)	(680		)	(72,078		)	—		(72,078		)
Balance at March 31, 2018	$	4,533,505		$	46,706		$	4,580,211		$	973	$	4,581,184

See accompanying Notes to Consolidated Financial Statements

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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 the General Partner and the Partnership. The 2017 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, 2017 (the "2017 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 2017 Annual Report.

The General Partner was formed in 1985, and we believe that it qualifies as a REIT under the provisions of the Internal Revenue Code of 1986, as amended (the "Code"). The Partnership was formed on October 4, 1993, when the General Partner contributed all of its properties and related assets and liabilities, together with the net proceeds from an offering of additional shares of its common stock, to the Partnership. Simultaneously, the Partnership completed the acquisition of Duke Associates, a full-service commercial real estate firm operating in the Midwest whose operations began in 1972.

The General Partner is the sole general partner of the Partnership, owning approximately 99.1% of the Common Units at March 31, 2018. The remaining 0.9% of the Common Units are owned by limited partners. As the sole general partner of the Partnership, the General Partner has full, exclusive and complete responsibility and discretion in the day-to-day management and control of the Partnership. The General Partner and the Partnership are operated as one enterprise. The management of the General Partner consists of the same members as the management of the Partnership. As the sole general partner with control of the Partnership, the General Partner consolidates the Partnership for financial reporting purposes, and the General Partner does not have any significant assets other than its investment in the Partnership. Therefore, the assets and liabilities of the General Partner and the Partnership are substantially the same.

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

As of March 31, 2018, we owned and operated a portfolio primarily consisting of industrial properties and provided real estate services to third-party owners. Substantially all of our Rental Operations (see Note 9) are conducted through the Partnership. We conduct our Service Operations (see Note 9) 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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2.    New Accounting Pronouncements

Recently Adopted Accounting Pronouncements

Revenue Recognition and De-recognition of Non-Financial Assets

On January 1, 2018, we concurrently adopted Accounting Standards Codification ("ASC") 606, Revenue from Contracts with Customers ("ASC 606") and ASC 610-20, Other Income: Gains and Losses from the De-recognition of Non-financial Assets ("ASC 610-20") using a modified retrospective ("cumulative effect") method of adoption. ASC 606 has superseded nearly all existing GAAP revenue recognition guidance, although its scope excludes lease contracts which represent our primary source of revenue. 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.

General Contractor and Service Fee Revenue

Beginning with the January 1, 2018 adoption date, general contractor and service fee revenues, as presented on the Consolidated Statements of Operations, are accounted for within the scope of ASC 606. General contractor and service fee revenues are comprised primarily of construction and development related revenues earned from third parties while acting in capacity of a developer, as a general contractor or a construction manager. There are other ancillary streams of revenue included in general contractor and service fee revenues (see Note 9), such as management fees earned from unconsolidated joint ventures, which are not significant. Opening and closing balances of construction receivables are presented separately on the Consolidated Balance Sheets. Over billed construction receivables totaled $295,000 and $276,000 at March 31, 2018 and December 31, 2017, respectively. We generally do not have any contract assets associated with our construction arrangements.

Our construction arrangements are typically structured with only one performance obligation, which generally represents either an obligation to construct a new building or to construct fixtures in an existing building, and these single performance obligations are satisfied over time as construction progresses. We recognize revenue as we satisfy such performance obligations using the percentage of completion method, which is an input method allowed under ASC 606. Using this method, profits are recorded based on our estimates of the percentage of completion of individual contracts, commencing when the work performed under the contracts reaches a point where the final costs can be estimated with reasonable accuracy. The percentage of completion estimates are based on a comparison of the contract expenditures incurred to the estimated final costs. We believe the percentage of completion method is a faithful depiction of the transfer of goods and services as changes in job performance and estimated profitability, which result in revisions to costs and income and are recognized in the period in which the revisions are determined, have not historically been significant. We typically receive regular progress payments on the majority of our construction arrangements and such arrangements generally have an original duration of less than one year.

As the result of the relatively short duration of our construction arrangements, we have elected to apply the optional disclosure exemptions, included in ASC 606, related to our remaining performance obligations for our in-process construction projects, for which any future variable consideration is not material.

De-Recognition of Non-Financial Assets

ASC 610-20 provides guidance on how entities recognize sales, including partial sales, of non-financial assets (and in-substance non-financial assets) to non-customers. ASC 606 includes guidance governing the sale of non-financial assets with customers, while sales of non-financial assets to non-customers are governed by ASC 610-20. The only difference in the treatment of sales to customers and non-customers is the presentation in the Consolidated Statements of Operations (revenue and expense is reported when the sale is to a customer and net gain or loss is reported when the sale is to a non-customer). Based on the nature of our business, we have concluded that our property sales represent transactions with non-customers. In the typical course of our business, sales of non-financial assets represent only one performance obligation and are recognized when an enforceable contract is in place, collectability is ensured and control is transferred to the buyer.

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ASC 610-20 also requires the seller to recognize a full gain or loss in a partial sale of non-financial assets, to the extent control is not retained. Any noncontrolling interest retained by the seller would, accordingly, be measured at fair value. We have primarily disposed of property and land in all cash transactions with no contingencies and no future involvement in the operations, and therefore, the adoption of ASC 610-20 has not significantly impacted the recognition of property and land sales.

There was no cumulative adjustment recognized to beginning retained earnings as of January 1, 2018 as the result of adopting ASC 606 and ASC 610-20.

Restricted Cash

In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows: Restricted Cash ("ASU 2016-18"). ASU 2016-18 requires entities to show the changes in the total of cash, cash equivalents and restricted cash in the statement of cash flows. As a result, entities will no longer present transfers between cash, cash equivalents and restricted cash in the statement of cash flows. We adopted this standard on January 1, 2018, on a retrospective basis, and the adoption did not have a material impact on our consolidated financial statements.

The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the Consolidated Balance Sheets that sum to the total of the same such amounts shown in the Consolidated Statements of Cash Flows (in thousands):

	March 31, 2018		December 31, 2017
Cash and cash equivalents	$	160,861	$	67,562
Restricted cash held in escrow for like-kind exchange	59,196		116,405
Restricted cash included in other escrow deposits and other assets	8,306		9,660
Total cash, cash equivalents, and restricted cash shown in the Consolidated Statements of Cash Flows	$	228,363	$	193,627

Restricted cash held in escrow for like-kind exchange on the Consolidated Balance Sheets includes cash received from the property dispositions but restricted only for qualifying like-kind exchange transactions.

Statement of Cash Flows

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows ("ASU 2016-15"). ASU 2016-15 clarifies how entities should classify certain cash receipts and cash payments on the statement of cash flows and how the predominance principle should be applied when cash receipts and cash payments have aspects of more than one class of cash flows. We adopted this standard on January 1, 2018, on a retrospective basis, and the adoption did not have a material impact on our consolidated financial statements.

New Accounting Pronouncement Not Yet Adopted

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.

For lessors, the accounting under ASU 2016-02 will remain largely unchanged from current GAAP; however ASU 2016-02 requires that lessors expense certain initial direct costs, which are capitalizable under existing leasing standards, as incurred. ASU 2016-02 also specifies that payments for certain lease-related services, which are often included in lease agreements, represent "non-lease" components that will become subject to the guidance in ASC 606, when ASU 2016-02 becomes effective. The FASB recently clarified that only new or modified leases subsequent to adoption of ASU 2016-02 will require different accounting for "non-lease" components under the guidance in ASC 606. Additionally, on March 28, 2018 the FASB tentatively approved amendments to ASU

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2016-02 (the "Approved Amendments"), which, if ultimately finalized as an amendment to ASU 2016-02, will allow lessors an optional election to not separate "non-lease" components from the related lease components. This election would be contingent upon certain conditions being met, including a requirement that separating the "non-lease" components would not result in a change in the timing and pattern of the revenue recognition.

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 classification. ASU 2016-02 will impact the accounting and disclosure requirements for ground leases, and other operating leases, where we are the lessee.

ASU 2016-02 will be effective for us on January 1, 2019 under the modified retrospective approach, 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 (i) relief from re-assessing whether an expired or existing contract meets the definition of a lease, (ii) relief from re-assessing the classification of expired or existing leases at the adoption date and (iii) allowing previously capitalized initial direct leasing costs to continue to be amortized. In addition to these practical expedients, the Approved Amendments also include an option that would allow lessors to use the effective date of ASU 2016-02 as the date of initial application, without restating comparative periods, and to recognize a cumulative effect adjustment as of the effective date. We are currently assessing the method of adoption and the impact that ASU 2016-02 will have on our consolidated financial statements but have tentatively concluded that we will apply the practical expedients as well as the optional relief provided by the Approved Amendments, should they be finalized.

3.    Reclassifications

Certain amounts in the accompanying consolidated financial statements that have been reclassified to conform to the 2018 consolidated financial statement presentation include the change in presentation for properties determined to be discontinued operations (see Note 10).

4.    Variable Interest Entities

Partnership

Due to the fact that the Limited Partners do not have kick out rights, or substantive participating rights, the Partnership is a variable interest entity ("VIE"). Because the General Partner holds majority ownership and exercises control over every aspect of the Partnership's operations, the General Partner has been determined as the primary beneficiary and, therefore, consolidates 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 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

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limited partners (or similar owning entities) that lack substantive participating or kick out rights and (iii) establish whether or not 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. Consolidated joint ventures that are VIEs are not significant in any period presented in these consolidated financial statements.

To the extent that our joint ventures do not qualify as VIEs, they are consolidated if we control them through majority ownership interests or if we are the managing entity (general partner or managing member) and the other partner does not have substantive participating rights. Control is further demonstrated by our ability to unilaterally make significant operating decisions, refinance debt and sell the assets of the joint venture without the consent of the non-managing entity and the inability of the non-managing entity to remove us from our role as the managing entity. Consolidated joint ventures that are not VIEs are not significant in any period presented in these consolidated financial statements.

There were no unconsolidated joint ventures, in which we have any recognized assets or liabilities or have retained any economic exposure to loss at March 31, 2018, that met the criteria to be considered VIEs. Our maximum loss exposure for guarantees of unconsolidated joint venture indebtedness, none of which relate to VIEs, totaled $102.9 million at March 31, 2018.

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 and to increase our overall investments in quality industrial projects. 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. Transaction costs related to asset acquisitions are capitalized and transaction costs related to business combinations and dispositions are expensed.

Acquisitions

We acquired two properties during the three months ended March 31, 2018. We determined that these two properties did not meet the definition of a business and, accordingly, we accounted for them as asset acquisitions as opposed to business combinations.

The following table summarizes amounts recognized for each major class of assets and liability (in thousands) for these acquisitions during the three months ended March 31, 2018:

Real estate assets	$	21,537
Lease related intangible assets	1,693
Total acquired assets	23,230
Below market lease liability	367
Fair value of acquired net assets	$	22,863

The leases in the acquired properties had a weighted average remaining life at acquisition of approximately 7.4 years.

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Fair Value Measurements

We determine the fair value of the individual components of real estate asset acquisitions primarily through calculating the "as-if vacant" value of a building, using an income approach, which relies 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 used in calculating the "as-if vacant" value for acquisition activity during the three months ended March 31, 2018 are as follows: 

	Low	High
Exit capitalization rate	4.50%	4.50%
Net rental rate per square foot	$9.12	$10.20

Capitalized acquisition costs were insignificant and the fair value of the two properties acquired during the three months ended March 31, 2018 was substantially the same as the cost of acquisition.

Dispositions

Dispositions of buildings and undeveloped land generated net cash proceeds of $131.4 million and $103.1 million during the three months ended March 31, 2018 and 2017, respectively. The number of buildings sold, as well as their classification between continuing and discontinued operations, is disclosed in Note 10.

6.    Indebtedness

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

	Book Value at 12/31/2017		Book Value at 3/31/2018		Fair Value at 12/31/2017		Issuances and Assumptions		Payments/Payoffs			Adjustments to Fair Value			Fair Value at 3/31/2018
Fixed rate secured debt	$	309,463	$	308,099	$	325,753	$	—	$	(1,345	)	$	(3,756	)	$	320,652
Variable rate secured debt	2,500		2,500		2,500		—		—			—			2,500
Unsecured debt	2,132,042		2,131,386		2,190,548		—		(656		)	(60,502		)	2,129,390
Unsecured line of credit	—		75,000		—		75,000		—			—			75,000
Total	$	2,444,005	$	2,516,985	$	2,518,801	$	75,000	$	(2,001	)	$	(64,258	)	$	2,527,542
Less: Deferred financing costs	21,114		20,529
Total indebtedness as reported on the consolidated balance sheets	$	2,422,891	$	2,496,456

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 3.90% to 4.00%, 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 three months ended March 31, 2018, we repaid one fixed rate secured loan, totaling $215,000, which had a stated interest rate of 5.55%.

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Unsecured Debt

At March 31, 2018, 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 95.00% to 122.00% of face value.

The indentures (and related supplemental indentures) governing our outstanding series of unsecured notes also require us to comply with financial ratios and other covenants regarding our operations. We were in compliance with all such financial covenants at March 31, 2018.

Unsecured Line of Credit

Our unsecured line of credit at March 31, 2018 is described as follows (in thousands):

Description	Borrowing Capacity		Maturity Date	Outstanding Balance at March 31, 2018
Unsecured Line of Credit - Partnership	$	1,200,000	January 30, 2022	$	75,000

The Partnership's unsecured line of credit has an interest rate on borrowings of LIBOR plus 0.875% (equal to 2.75% for outstanding borrowings at March 31, 2018) and has a maturity date of January 30, 2022, with options to extend until January 30, 2023. Subject to certain conditions, the terms also include an option to increase the facility by up to an additional $800.0 million, for a total of up to $2.00 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 March 31, 2018, we were in compliance with all financial covenants under this line of credit.

We utilize a discounted cash flow methodology in order to estimate the fair value of outstanding borrowings on 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. The current market rate is internally estimated and therefore is primarily based upon a level 3 input.

7.    Related Party Transactions

We provide property management, asset management, leasing, construction and other tenant-related services to unconsolidated joint ventures 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

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percentage of these fees in the consolidated financial statements. The following table summarizes the fees earned from these joint ventures, prior to the elimination of our ownership percentage (in thousands): 

	Three Months Ended
	March 31,
	2018		2017
Management fees	$	442	$	811
Leasing fees	302		434
Construction and development fees	697		624

8.    Net Income per Common Share or Common Unit

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

Diluted net income per common share is computed by dividing the sum of net income attributable to common shareholders and the noncontrolling interest in earnings allocable to Limited Partner Units (to the extent the Limited Partner Units are dilutive), less dividends or distributions on participating securities that are anti-dilutive, by the sum of the weighted average number of common shares outstanding and, to the extent they are dilutive, weighted average number of Limited Partner Units outstanding and any potential dilutive securities for the period. Diluted net income per Common Unit is computed by dividing the net income attributable to common unitholders, less dividends or distributions on participating securities that are anti-dilutive, by the sum of the weighted average number of Common Units outstanding and any potential dilutive securities for the period. The following table reconciles the components of basic and diluted net income per common share or Common Unit (in thousands): 

	Three Months Ended March 31,
	2018			2017
General Partner
Net income attributable to common shareholders	$	72,963		$	70,200
Less: dividends on participating securities	(437		)	(542		)
Basic net income attributable to common shareholders	72,526			69,658
Add back dividends on dilutive participating securities	—			305
Noncontrolling interest in earnings of common unitholders	683			652
Diluted net income attributable to common shareholders	$	73,209		$	70,615
Weighted average number of common shares outstanding	356,740			355,282
Weighted average Limited Partner Units outstanding	3,355			3,316
Other potential dilutive shares	305			2,102
Weighted average number of common shares and potential dilutive securities	360,400			360,700
Partnership
Net income attributable to common unitholders	$	73,646		$	70,852
Less: distributions on participating securities	(437		)	(542		)
Basic net income attributable to common unitholders	$	73,209		$	70,310
Add back distributions on dilutive participating securities	—			305
Diluted net income attributable to common unitholders	$	73,209		$	70,615
Weighted average number of Common Units outstanding	360,095			358,598
Other potential dilutive units	305			2,102
Weighted average number of Common Units and potential dilutive securities	360,400			360,700

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): 

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	Three Months Ended March 31,
	2018	2017
General Partner and Partnership
Other potential dilutive shares or units:
Anti-dilutive outstanding potential shares or units under fixed stock option and other stock-based compensation plans	—	—
Anti-dilutive outstanding participating securities	2,272	1,389

9.    Segment Reporting

Reportable Segments

During the year ended December 31, 2017, we completed the disposition of our medical office portfolio (the "Medical Office Portfolio Disposition"), which resulted in all of our in-service medical office properties being classified within discontinued operations with the exception of a property that did not meet the criteria for classification as held for sale at March 31, 2018. As a result of this transaction, beginning the second quarter of 2017, our medical office properties were no longer presented as a separate reportable segment, with substantially all such operating results being classified within discontinued operations. The remaining medical office property included in continuing operations no longer meets the quantitative thresholds for separate presentation, and is classified as part of our non-reportable Rental Operations. Properties that are not included in our reportable segments, because they do not by themselves meet the quantitative thresholds for separate presentation as a reportable segment, are generally referred to as non-reportable Rental Operations. Our non-reportable Rental Operations primarily include our remaining office properties and medical office property at March 31, 2018.

As of March 31, 2018, we had two reportable operating segments, the first consisting of the ownership and rental of industrial real estate investments. Our ongoing investments in new real estate investments are determined largely upon anticipated geographic trends in supply and demand for industrial buildings, as well as the real estate needs of our major tenants that operate on a national level. Our strategic initiatives and our allocation of resources have been historically based upon allocation among product types, which was consistent with our designation of reportable segments, and after having sold nearly all of our office and medical office properties we intend to increase our investment in industrial properties and treat them as a single operating and reportable segment. The operations of our industrial properties, as well as our non-reportable Rental Operations, are collectively referred to as "Rental Operations."

Our second 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." The Service Operations segment is identified as one single operating segment because the lowest level of financial results reviewed by our chief operating decision maker are the results for the Service Operations segment in total. Further, our reportable segments are managed separately because each segment requires different operating strategies and management expertise.

Revenues by Reportable Segment

The following table shows the revenues for each of the reportable segments, as well as a reconciliation to consolidated revenues (in thousands): 

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	Three Months Ended March 31,
	2018		2017
Revenues
Rental Operations:
Industrial	$	189,315	$	156,882
Non-reportable Rental Operations	3,453		14,416
Service Operations	41,101		9,399
Total segment revenues	233,869		180,697
Other revenue	688		378
Consolidated revenue from continuing operations	234,557		181,075
Discontinued operations	5		46,239
Consolidated revenue	$	234,562	$	227,314

Supplemental Performance Measure

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

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

The following table shows a reconciliation of our segment-level measures of profitability to consolidated income from continuing operations before income taxes (in thousands and excluding discontinued operations): 

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	Three Months Ended March 31,
	2018			2017
PNOI
Industrial	$	133,388		$	114,680
Non-reportable Rental Operations	921			927
PNOI, excluding all sold properties	134,309			115,607
PNOI from sold properties included in continuing operations	1,606			2,905
PNOI, continuing operations	$	135,915		$	118,512
Earnings from Service Operations	692			1,775
Rental Operations revenues and expenses excluded from PNOI:
Straight-line rental income and expense, net	6,289			1,577
Revenues related to lease buyouts	23			9,785
Amortization of lease concessions and above and below market rents	545			(543		)
Intercompany rents and other adjusting items	14			180
Non-Segment Items:
Equity in earnings of unconsolidated joint ventures	8,287			4,749
Interest expense	(20,000		)	(24,162		)
Depreciation and amortization expense	(77,529		)	(62,023		)
Gain on sale of properties	44,886			37,046
Impairment charges	—			(859		)
Interest and other income, net	4,463			533
General and administrative expenses	(21,023		)	(19,232		)
Gain on land sales	2,949			1,505
Other operating expenses	(786		)	(738		)
Gain on extinguishment of debt	—			25
Other non-segment revenues and expenses, net	(872		)	(583		)
Income from continuing operations before income taxes	$	83,853		$	67,547

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.

10.    Real Estate Assets, Discontinued Operations and Assets Held for Sale

Real Estate Assets

Real estate assets, excluding assets held for sale, consisted of the following (in thousands):

	March 31, 2018		December 31, 2017
Buildings and tenant improvements	$	4,668,740	$	4,642,832
Land and improvements	1,939,854		1,950,735
Real estate assets	$	6,608,594	$	6,593,567

Discontinued Operations

The following table illustrates the number of sold or held-for-sale properties included in, or excluded from, discontinued operations in this report:

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	Held-for-Sale at March 31, 2018	Sold Year-to-Date in 2018	Sold in 2017	Total
Total properties included in discontinued operations	—	—	81	81
Properties excluded from discontinued operations	2	6	17	25
Total properties sold or classified as held-for-sale	2	6	98	106

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 was based upon an allocable share of our consolidated unsecured interest expense, as none of the properties included in discontinued operations were encumbered by secured debt. 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 three months ended March 31, 2018 and, as such, no interest expense was allocated to discontinued operations during that period.

The following table illustrates the operational results of the buildings reflected in discontinued operations (in thousands):  

	Three Months Ended March 31,
	2018			2017
Revenues	$	5		$	46,239
Operating expenses	(13		)	(14,996		)
Depreciation and amortization	—			(19,534		)
Operating (loss) income	(8		)	11,709
Interest expense	—			(6,343		)
(Loss) income before gain on sales	(8		)	5,366
Gain on sale of depreciable properties	132			—
Income from discontinued operations	$	124		$	5,366

There were no capital expenditures for properties within discontinued operations during the three months ended March 31, 2018. Capital expenditures on a cash basis for the three months ended March 31, 2017 were $12.6 million for properties 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 noncontrolling interests (in thousands):

	Three Months Ended March 31,
	2018		2017
Income from continuing operations attributable to common shareholders	$	72,840	$	64,884
Income from discontinued operations attributable to common shareholders	123		5,316
Net income attributable to common shareholders	$	72,963	$	70,200

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.

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Assets Held for Sale

At March 31, 2018, two in-service properties and ten 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 properties and land held for sale (in thousands):

	Held-for-Sale Properties Included in Continuing Operations
	March 31, 2018			December 31, 2017
Land and improvements	$	9,055		$	8,157
Buildings and tenant improvements	15,283			10,505
Undeveloped land	706			—
Accumulated depreciation	(4,824		)	(2,553		)
Deferred leasing and other costs, net	862			862
Other assets	658			579
Total assets held for sale	$	21,740		$	17,550
Total liabilities related to assets held for sale	$	1,327		$	1,163

11.    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 April 25, 2018:

Class of stock/units	Quarterly Amount per Share or Unit	Record Date	Payment Date
Common - Quarterly	$0.20	May 16, 2018	May 31, 2018

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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 2017 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," "strategy," "continue," "seek," "may," "could" and similar expressions or statements regarding future periods are intended to identify forward-looking statements, although not all forward-looking statements may 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 or the information incorporated by reference into 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, or at all;

• 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 successfully integrate our acquired properties;

• 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 Securities and Exchange Commission (the "SEC").

Although we presently believe that the plans, expectations and anticipated results expressed in or suggested by the forward-looking statements contained in 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 2017

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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, Current Reports on Form 8-K and other filings that we make with the SEC. 

Business Overview

The General Partner and Partnership collectively specialize in the ownership, management and development of industrial real estate.

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 2017 Annual Report.

At March 31, 2018, we:

• Owned or jointly controlled 507 primarily industrial properties, of which 489 properties with 139.8 million square feet were in service and 18 properties with 9.6 million square feet were under development. The 489 in-service properties were comprised of 449 consolidated properties with 129.1 million square feet and 40 jointly controlled unconsolidated properties with 10.8 million square feet. The 18 properties under development consisted of 16 consolidated properties with 8.5 million square feet and two jointly controlled unconsolidated properties with 1.1 million square feet.

• Owned directly, or through ownership interests in unconsolidated joint ventures (with acreage not adjusted for our percentage ownership interest), approximately 1,900 acres of land and controlled approximately 1,400 acres through purchase options.

Our overall strategy is to continue to increase our investment in quality industrial properties primarily through development, on both a speculative and build-to-suit basis, supplemented with acquisitions in higher barrier markets with the highest growth potential.

As of March 31, 2018, we had two reportable operating segments, the first consisting of the ownership and rental of industrial real estate investments. The operations of our industrial properties, as well as our non-reportable Rental Operations, are collectively referred to as "Rental Operations." Our second 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 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 aforementioned 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 March 31, 2018 and 2017, respectively:

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	Total Square Feet (in thousands)		Percent of Total Square Feet				Percent Leased*				Average Annual Net Effective Rent**
Type	2018	2017	2018		2017		2018		2017		2018	2017
Industrial	128,661	113,863	99.7	%	94.4	%	97.4	%	98.5	%	$4.48	$4.19
Non-reportable Rental Operations	399	6,796	0.3	%	5.6	%	58.9	%	89.8	%	$19.81	$23.40
Total Consolidated	129,060	120,659	100.0	%	100.0	%	97.3	%	98.1	%	$4.51	$5.19
Unconsolidated Joint Ventures	10,759	11,286					90.5	%	89.4	%	$4.22	$5.90
Total Including Unconsolidated Joint Ventures	139,819	131,945					96.7	%	97.4	%
* Represents the percentage of total square feet leased based on executed leases and without regard to whether the leases have commenced.
**Average annual net effective rent 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.

The decreased occupancy within our industrial portfolio at March 31, 2018, compared to March 31, 2017, resulted from speculative developments being placed in service or acquired from third parties.

Vacancy Activity

The following table sets forth vacancy activity, shown in square feet, from our in-service rental properties included within both continuing and discontinued operations, at March 31, 2018 (in thousands):

	Consolidated Properties		Unconsolidated Joint Venture Properties		Total Including Unconsolidated Joint Venture Properties
Vacant square feet at December 31, 2017	4,992		1,219		6,211
Vacant space in completed developments	189		—		189
Dispositions	(59	)	—		(59	)
Expirations	1,985		64		2,049
Early lease terminations	53		—		53
Property structural changes/other	(10	)	—		(10	)
Leasing of previously vacant space	(3,619	)	(258	)	(3,877	)
Vacant square feet at March 31, 2018	3,531		1,025		4,556

Total Leasing Activity

The initial leasing of development projects or vacant space in acquired properties is referred to as first generation lease activity. Our ability to maintain and improve occupancy rates and net effective rents primarily depends upon our continuing ability to re-lease expiring space. The leasing of such space that we have previously held under lease to a tenant is referred to as second generation lease activity. Second generation lease activity may be in the form of renewals of existing leases or new second generation leases of previously leased space. The total leasing activity for our consolidated and unconsolidated rental properties included within both continuing and discontinued operations, expressed in square feet of leases signed, is as follows (in thousands):

	Three Months Ended March 31,
	2018	2017
New Leasing Activity - First Generation Industrial	2,520	2,436
New Leasing Activity - Second Generation Industrial	2,633	1,096
Renewal Leasing Activity - Industrial	1,477	1,257
Non-reportable Rental Operations Leasing Activity	—	174
Total Consolidated Leasing Activity	6,630	4,963
Unconsolidated Joint Venture Leasing Activity	320	662
Total Including Unconsolidated Joint Venture Leasing Activity	6,950	5,625

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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 second generation industrial leases signed for our rental properties included within both continuing and discontinued operations, during the three months ended March 31, 2018 and 2017:

	Square Feet of Leases (in thousands)		Percent of Expiring Leases Renewed				Average Term in Years		Estimated Tenant Improvement Cost per Square Foot		Leasing Commissions per Square Foot
	2018	2017	2018		2017		2018	2017	2018	2017	2018	2017
Three Months Ended March 31,
Consolidated - New Second Generation	2,633	1,096					7.2	5.2	$1.66	$1.84	$1.92	$1.33
Unconsolidated Joint Ventures - New Second Generation	128	54					10.8	14.6	$2.35	$1.37	$3.61	$2.62
Total - New Second Generation	2,761	1,150					7.3	5.6	$1.69	$1.82	$2.00	$1.39
Consolidated - Renewal	1,477	1,257	69.1	%	85.6	%	4.6	4.7	$1.09	$0.71	$1.39	$1.21
Unconsolidated Joint Ventures - Renewal	62	156	49.1	%	74.1	%	6.4	3.7	$1.26	$0.21	$2.09	$0.85
Total - Renewal	1,539	1,413	68.0	%	84.1	%	4.6	4.6	$1.10	$0.65	$1.41	$1.17

Growth in average annual net effective rents for the consolidated new second generation and renewal leases, on a combined basis, was 25.6% and 22.7% for the three months ended March 31, 2018 and 2017, respectively. Growth in net effective rents for the unconsolidated new second generation and renewal leases, on a combined basis, was 25.9% and 31.0% for the three months ended March 31, 2018 and 2017, respectively.

Lease Expirations

The table below reflects our consolidated in-service portfolio lease expiration schedule at March 31, 2018 (in thousands, except percentage data and number of leases):

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	Total Consolidated Portfolio					Industrial				Non-reportable
Year of Expiration	Square Feet		Annual Rental Revenue*		Number of Leases	Square Feet		Annual Rental Revenue*		Square Feet		Annual Rental Revenue*
Remainder of 2018	6,561		$	25,610	77	6,554		$	25,522	7		$	88
2019	11,504		47,035		136	11,492		46,886		12		149
2020	13,649		61,593		147	13,644		61,526		5		67
2021	12,728		56,878		131	12,669		56,383		59		495
2022	18,396		74,604		124	18,378		74,424		18		180
2023	10,130		49,471		103	10,120		49,331		10		140
2024	11,540		52,928		61	11,535		52,866		5		62
2025	10,181		45,689		52	10,181		45,689		—		—
2026	7,546		33,568		27	7,546		33,568		—		—
2027	6,538		28,404		19	6,538		28,404		—		—
2028 and Thereafter	16,755		90,108		52	16,636		86,622		119		3,486
Total Leased	125,528		$	565,888	929	125,293		$	561,221	235		$	4,667
Total Portfolio Square Feet	129,060					128,661				399
Percent Leased	97.3	%				97.4	%			58.9	%
* 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.

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 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 three months ended March 31, 2018, and 28 buildings during the year ended December 31, 2017, one of which was sold as part of the Medical Office Portfolio Disposition. 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):

	Year-to-Date 2018 Acquisitions						Full Year 2017 Acquisitions
Type	Acquisition Price*		In-Place Yield**		Percent Leased at Acquisition Date***		Acquisition Price*		In-Place Yield**		Percent Leased at Acquisition Date***
Industrial	$	22,863	4.4	%	100.0	%	$	980,339	2.5	%	68.5	%
Non-reportable Rental Operations	—		—		—		10,829		6.1	%	100.0	%
Total	$	22,863	4.4	%	100.0	%	$	991,168	2.5	%	68.8	%
* Includes fair value of 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.

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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 sold six consolidated buildings during the three months ended March 31, 2018 and 98 consolidated buildings, including 85 properties sold as part of the Medical Office Portfolio Disposition, during the year ended December 31, 2017. 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 2018 Dispositions						Full Year 2017 Dispositions
Type	Sales Price		In-Place Yield*		Percent Occupied**		Sales Price		In-Place Yield*		Percent Occupied**
Industrial	$	15,750	5.0	%	87.7	%	$	45,192	7.0	%	92.6	%
Non-reportable Rental Operations	114,327		4.8	%	96.1	%	2,938,572		4.8	%	93.9	%
Total	$	130,077	5.1	%	94.0	%	$	2,983,764	4.8	%	93.5	%
*   In-place yields of completed dispositions are calculated as annualized net operating income from space leased to tenants at the date of sale on a lease-up basis, including full rent from all executed leases, even if currently in a free rent period, divided by the sales price. Annualized net operating income is comprised of base rental payments, excluding reimbursement of 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 sale.

Development

At March 31, 2018, we had 9.6 million square feet of property under development with total estimated costs upon completion of $834.9 million compared to 11.0 million square feet with total estimated costs upon completion of $894.8 million at March 31, 2017. The square footage and estimated costs include both consolidated properties and unconsolidated joint venture development activity at 100%.

The following table summarizes our properties under development at March 31, 2018 (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	8,477	52	%	$	780,825	$	422,239	$	358,586
Unconsolidated joint venture properties	1,108	100	%	54,096		41,206		12,890
Total	9,585	57	%	$	834,921	$	463,445	$	371,476

Results of Operations

A summary of our operating results and property statistics is as follows (in thousands, except number of properties and per share or Common Unit data):

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	Three Months Ended March 31,
	2018		2017
Rental and related revenue from continuing operations	$	193,456	$	171,676
General contractor and service fee revenue	41,101		9,399
Operating income	99,390		91,151
General Partner
Net income attributable to common shareholders	$	72,963	$	70,200
Weighted average common shares outstanding	356,740		355,282
Weighted average common shares and potential dilutive securities	360,400		360,700
Partnership
Net income attributable to common unitholders	$	73,646	$	70,852
Weighted average Common Units outstanding	360,095		358,598
Weighted average Common Units and potential dilutive securities	360,400		360,700
General Partner and Partnership
Basic income per common share or Common Unit:
Continuing operations	$	0.20	$	0.18
Discontinued operations	$	—	$	0.02
Diluted income per common share or Common Unit:
Continuing operations	$	0.20	$	0.18
Discontinued operations	$	—	$	0.02
Number of in-service consolidated properties at end of period:
Continuing operations	449		415
Discontinued operations	—		81
In-service consolidated square footage at end of period	129,060		120,659
Number of in-service joint venture properties at end of period	40		42
In-service joint venture square footage at end of period	10,759		11,286

Supplemental Performance Measures

In addition to net income 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 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 (loss) 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 (loss) from continuing operations before income taxes, or any other measures derived

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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 gains or losses from sales of previously depreciated real estate assets, impairment charges related to depreciable real estate assets, taxes associated with sales of previously depreciated 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 (in thousands):

	Three Months Ended March 31,
	2018			2017
Net income attributable to common shareholders of the General Partner	$	72,963		$	70,200
Add back: Net income attributable to noncontrolling interests - common limited partnership interests in the Partnership	683			652
Net income attributable to common unitholders of the Partnership	73,646			70,852
Adjustments:
Depreciation and amortization	77,529			81,557
Company share of joint venture depreciation, amortization and other adjustments	2,161			2,495
Impairment charges - depreciable property	—			859
Gain on depreciable property sales - wholly owned	(45,018		)	(37,046		)
Income tax expense triggered by depreciable property sales	10,329			—
Gains on depreciable property sales - share of unconsolidated joint ventures	(6,217		)	(1,798		)
FFO attributable to common unitholders of the Partnership	$	112,430		$	116,919
Additional General Partner Adjustments:
Net income attributable to noncontrolling interests - common limited partnership interests in the Partnership	(683		)	(652		)
Noncontrolling interest share of adjustments	(361		)	(427		)
FFO attributable to common shareholders of the General Partner	$	111,386		$	115,840

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. 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.

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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.

Note 9 to the consolidated financial statements included in Part I, Item 1 of this Report shows a calculation of our PNOI for the three months ended March 31, 2018 and 2017 and provides a reconciliation of PNOI for our Rental Operations segments to income from continuing operations before income taxes.

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 which also excludes income from lease buyouts.

Effective January 1, 2018, we define our "same property" population once a year at the beginning of the current calendar year and include buildings that were stabilized (the term "stabilized" means properties that have reached 90% leased or that have been in-service for at least one year since development completion or acquisition) as of January 1 of the prior calendar year. The "same property" pool is also adjusted to remove properties that were sold subsequent to the beginning of the current calendar year. As such, the "same property" population for the period ended March 31, 2018 includes all properties that we owned or jointly controlled at January 1, 2018, which had both been owned or jointly controlled and had reached stabilization by January 1, 2017, and have not been sold.

A reconciliation of income from continuing operations before income taxes to SPNOI is presented as follows (in thousands, except percentage data):

	Three Months Ended March 31,						Percent
	2018			2017			Change
Income from continuing operations before income taxes	$	83,853		$	67,547
Share of SPNOI from unconsolidated joint ventures	4,008			3,954
PNOI excluded from the "same property" population	(19,579		)	(4,762		)
Earnings from Service Operations	(692		)	(1,775		)
Rental Operations revenues and expenses excluded from PNOI	(8,477		)	(13,904		)
Non-Segment Items	59,625			63,739
SPNOI	$	118,738		$	114,799		3.4	%

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 9 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:

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	Three Months Ended March 31,
	2018	2017
Number of properties	425	425
Square feet (in thousands) (1)	113,230	113,230
Average commencement occupancy percentage (2)	97.9%	97.6%
Average rental rate - cash basis (3)	$4.27	$4.16
(1) Includes the total square feet of the consolidated properties that are in the "same property" population as well as 4.5 million square feet of space for unconsolidated joint ventures, which represents our ratable share of the 9.1 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 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, its rent would equal zero for purposes of this metric.

Comparison of Three Months Ended March 31, 2018 to Three Months Ended March 31, 2017

Rental and Related Revenue

The following table sets forth rental and related revenue from continuing and discontinued operations (in thousands): 

	Three Months Ended March 31,
	2018		2017
Rental and related revenue:
Industrial	$	189,315	$	156,882
Non-reportable Rental Operations and non-segment revenues	4,141		14,794
Total rental and related revenue from continuing operations	$	193,456	$	171,676
Rental and related revenue from discontinued operations	5		46,239
Total rental and related revenue from continuing and discontinued operations	$	193,461	$	217,915

The primary reasons for the increase in rental and related revenue from continuing operations were:

• We acquired 29 properties and placed 25 developments in service from January 1, 2017 to March 31, 2018, which provided incremental revenues from continuing operations of $24.6 million during the three months ended March 31, 2018, as compared to the same period in 2017.

• Increased rental rates within our "same property" portfolio also contributed to the increase to rental and related revenue from continuing operations.

• The sale of 19 in-service properties since January 1, 2017, which did not meet the criteria to be classified within discontinued operations, resulted in a decrease of $11.8 million to rental and related revenue from continuing operations in the three months ended March 31, 2018, as compared to the same period in 2017, which partially offset the aforementioned increases to rental and related revenue from continuing operations.

Rental and related revenue from discontinued operations for the three months ended March 31, 2018 decreased compared to the same period in 2017 as the result of the properties classified within discontinued operations being sold throughout 2017.

Rental Expenses and Real Estate Taxes

The following table sets forth rental expenses and real estate taxes from continuing and discontinued operations (in thousands):

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	Three Months Ended March 31,
	2018			2017
Rental expenses:
Industrial	$	18,694		$	14,805
Non-reportable Rental Operations and non-segment expenses	1,702			1,432
Total rental expenses from continuing operations	$	20,396		$	16,237
Rental expenses from discontinued operations	(4		)	9,034
Total rental expenses from continuing and discontinued operations	$	20,392		$	25,271
Real estate taxes:
Industrial	$	30,418		$	25,388
Non-reportable Rental Operations and non-segment expenses	728			1,123
Total real estate tax expense from continuing operations	$	31,146		$	26,511
Real estate tax expense from discontinued operations	17			5,962
Total real estate tax expense from continuing and discontinued operations	$	31,163		$	32,473

Rental expenses from continuing operations increased by $4.2 million during the three months ended March 31, 2018, compared to the same period in 2017. The increase to rental expenses was primarily the result of acquisitions and developments placed in service from January 1, 2017 to March 31, 2018, partially offset by the sale of properties included in continuing operations.

Real estate tax expense from continuing operations increased by $4.6 million during the three months ended March 31, 2018, compared to the same period in 2017. The increase to real estate tax expense was mainly the result of acquisitions and developments placed in service from January 1, 2017 to March 31, 2018 and increases in real estate taxes on our existing base of properties. These increases to real estate tax expense were partially offset by the impact of property sales that did not meet the criteria to be classified within discontinued operations.

The decreases in both rental expenses and real estate tax expense from discontinued operations are the result of the properties classified within discontinued operations being sold throughout 2017.

Depreciation and Amortization

Depreciation and amortization expense from continuing operations increased from $62.0 million for the three months ended March 31, 2017 to $77.5 million for the same period in 2018 primarily as the result of the properties acquired and the developments placed in service since January 1, 2017. The impact of acquired properties and 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 of Unconsolidated Joint Ventures

Equity in earnings of unconsolidated joint ventures represents our ownership share of net income from investments in unconsolidated joint ventures that generally own and operate rental properties. Equity in earnings of unconsolidated joint ventures increased from $4.7 million for the three months ended March 31, 2017 to $8.3 million for the same period in 2018. During the three months ended March 31, 2018, we recognized $6.2 million of equity in earnings of unconsolidated joint ventures related to our share of the gain on sale of four joint venture buildings. During the three months ended March 31, 2017, we recognized $1.8 million of equity in earnings of unconsolidated joint ventures related to our share of the gain on sale of one joint venture building.

Gain on Sale of Properties - Continuing Operations

The $44.9 million recognized as gain on sale of properties in continuing operations for the three months ended March 31, 2018 is the result of the sale of six properties that did not meet the criteria for inclusion in discontinued operations.

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The $37.0 million recognized as gain on sale of properties in continuing operations for the three months ended March 31, 2017 was the result of the sale of seven properties that did not meet the criteria for inclusion in discontinued operations.

General and Administrative Expenses

General and administrative expenses consist of two components. The first component includes general corporate expenses, and the second component represents the indirect operating costs not allocated to, or absorbed by, either development, leasing and operation of our wholly owned properties or our Service Operations. Such indirect operating costs 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 operating 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 increased from $19.2 million for the three months ended March 31, 2017 to $21.0 million for the same period in 2018. The following table sets forth the factors that led to the increased general and administrative expenses (in millions):

General and administrative expenses - three-month period ended March 31, 2017	$	19.2
Increase to overall pool of overhead costs	1.7
Decreased absorption of costs by wholly owned leasing and development activities (1)	0.7
Increased allocation of costs to Service Operations and Rental Operations (2)	(0.6		)
General and administrative expenses - three-month period ended March 31, 2018	$	21.0

(1) We capitalized $8.2 million and $4.7 million of our total overhead costs to leasing and development, respectively, for consolidated properties during the three months ended March 31, 2018, compared to capitalizing $5.3 million and $8.3 million of such costs, respectively, for the three months ended March 31, 2017. Combined overhead costs capitalized to leasing and development totaled 30.4% and 33.3% of our overall pool of overhead costs for the three months ended March 31, 2018 and 2017, respectively.

(2) The increase in allocation of costs to Service Operations and Rental Operations resulted from a higher volume of third party construction projects performed for certain of our unconsolidated joint ventures during the three months ended March 31, 2018.

Interest Expense

Interest expense allocable to continuing operations decreased from $24.2 million for the three months ended March 31, 2017 to $20.0 million for the three months ended March 31, 2018. The decrease to interest expense from continuing operations was primarily due to interest savings from repaying outstanding debt with the proceeds from the Medical Office Portfolio Disposition, and refinancing higher rate senior unsecured notes during 2017.

We capitalized $8.1 million and $4.2 million of interest costs for the three months ended March 31, 2018 and 2017, respectively.

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 and related income tax expenses.

We had no buildings classified as discontinued operations for the three months ended March 31, 2018 and had 81 consolidated properties classified as discontinued operations for the three months ended March 31, 2017. The amounts classified in discontinued operations for the three months ended March 31, 2018 were comprised of true-up activity related to 2017 property sales that were classified as discontinued operations. 

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These 81 consolidated properties were all medical office properties that were sold in 2017. As a result, we classified income before gain on sales of $5.4 million within discontinued operations for the three months ended March 31, 2017.

Liquidity and Capital Resources

Sources of Liquidity

We expect to meet our short-term liquidity requirements over the next 12 months, including maturities of indebtedness, payments of dividends and distributions and the capital expenditures needed to maintain our current real estate assets, primarily through working capital, net cash provided by operating activities and proceeds received from real estate dispositions. We had $75.0 million of outstanding borrowings on the Partnership's $1.20 billion unsecured line of credit, had $160.9 million of cash on hand and held $59.2 million of restricted cash for future like-kind exchange transactions at March 31, 2018.

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 and through accessing the public debt and equity markets. At March 31, 2018, we also held $365.0 million of notes receivable from the various entities that purchased our medical office properties in 2017, which are scheduled to mature at various points through January 2020.

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.

We are 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.

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 March 31, 2018.

At March 31, 2018, 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 (including guarantees of the Partnership's debt securities by the General Partner). This automatic shelf registration statement was renewed on April 30, 2018. 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 has an at the market ("ATM") equity program that allows it to issue new common shares from time to time, with an aggregate offering price of up to $200.0 million. During the three months ended March 31,

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2018, the General Partner did not issue any common shares pursuant to its ATM equity program. As of March 31, 2018, the ATM equity program still had $108.1 million worth of new common shares available to issue.

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 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.

Sales of land and depreciable properties provided $131.4 million in net proceeds during the three months ended March 31, 2018.

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 three months ended March 31, 2018, our share of sale and capital distributions from unconsolidated joint ventures totaled $9.4 million.

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

Our overall strategy is to continue to increase our investment in quality industrial properties, primarily through development, on both a speculative and build-to-suit basis, supplemented with acquisitions in higher barrier markets with the highest growth potential. 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.

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Tenant improvements and leasing costs to renew or re-let rental space that we previously leased to tenants for new second generation leases 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.

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):

	Three Months Ended March 31,
	2018		2017
Second generation tenant improvements	$	3,602	$	3,694
Second generation leasing costs	10,278		5,650
Building improvements	222		1,087
Total second generation capital expenditures	$	14,102	$	10,431
Development of real estate investments	$	104,346	$	112,727
Other deferred leasing costs	$	9,798	$	4,398

The capital expenditures in the table above include the capitalization of internal overhead costs. We capitalized $8.2 million and $5.3 million of overhead costs related to leasing activities, including both first and second generation leases, during the three months ended March 31, 2018 and 2017, respectively. We capitalized $4.7 million and $8.3 million of overhead costs related to development activities, including both development and tenant improvement projects on first and second generation space, during the three months ended March 31, 2018 and 2017, respectively. Combined overhead costs capitalized to leasing and development totaled 30.4% and 33.3% of our overall pool of overhead costs for the three months ended March 31, 2018 and 2017, respectively. Further discussion of the capitalization of overhead costs can be found herein, in the quarter-to-quarter comparison of general and administrative expenses of this Item 2 as well as in the Critical Accounting Policies section of Management's Discussion and Analysis of Financial Condition and Results of Operations in our 2017 Annual Report.

In addition to the capitalization of overhead costs, the totals for development of real estate assets in the table above include the capitalization of $8.1 million and $4.2 million of interest costs during the three months ended March 31, 2018 and 2017, respectively.

The following table summarizes our second generation capital expenditures (in thousands):

	Three Months Ended March 31,
	2018		2017
Industrial	$	14,044	$	9,401
Non-reportable Rental Operations	58		1,030
Total	$	14,102	$	10,431

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.

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 regular dividends or distributions of $0.20 per common share or Common Unit in the first quarter of

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2018, and the General Partner's board of directors declared dividends or distributions of $0.20 per common share or Common Unit for the second quarter of 2018.

We expect to continue to distribute at least an amount equal to our taxable earnings, to meet the requirements to maintain the General Partner's REIT status, and additional amounts as determined by the General Partner's board of directors. Distributions are declared at the discretion of the General Partner's board of directors and are subject to actual cash available for distribution, our financial condition, capital requirements and such other factors as the General Partner's board of directors deems relevant.

Debt Maturities

Debt outstanding at March 31, 2018 had a face value totaling $2.52 billion with a weighted average interest rate of 4.28% and maturities at various dates through 2028. Of this total amount, we had $2.13 billion of unsecured debt, $310.4 million of secured debt and $75.0 million of outstanding borrowings on our unsecured line of credit at March 31, 2018. Scheduled principal amortization, maturities and early repayments of such debt totaled $2.0 million for the three months ended March 31, 2018.

The following table is a summary of the scheduled future amortization and maturities of our indebtedness at March 31, 2018 (in thousands, except percentage data):

 

	Future Repayments
Year	Scheduled Amortization		Maturities		Total		Weighted Average Interest Rate of Future Repayments
Remainder of 2018	$	5,768	$	—	$	5,768	6.17	%
2019	6,935		268,438		275,373		7.61	%
2020	5,381		—		5,381		5.82	%
2021	3,416		259,047		262,463		3.99	%
2022	3,611		600,000		603,611		4.20	%
2023	3,817		325,000		328,817		3.52	%
2024	4,036		300,000		304,036		3.92	%
2025	3,938		—		3,938		5.60	%
2026	2,029		375,000		377,029		3.37	%
2027	358		300,000		300,358		3.40	%
2028	—		50,000		50,000		7.29	%
Thereafter	—		—		—		N/A
	$	39,289	$	2,477,485	$	2,516,774	4.28	%

The Partnership’s unsecured line of credit is reflected in the table above as maturing in January 2023, based on the ability to exercise the two six-month extension options from its stated maturity date of January 2022 (see Note 6). 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.

Repayments of Outstanding Debt

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

Contractual Obligations

Aside from repayments of long-term debt, there have been no other material changes in our outstanding commitments since December 31, 2017, as previously discussed in our 2017 Annual Report.

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Historical Cash Flows

Cash, cash equivalents and restricted cash were $228.4 million and $79.6 million at March 31, 2018 and 2017, respectively. The following table highlights significant changes in net cash associated with our operating, investing and financing activities (in millions): 

	Three Months Ended March 31,
	2018			2017
General Partner
Net cash provided by operating activities	$	113.2		$	109.7
Net cash used for investing activities	$	(38.3	)	$	(188.9	)
Net cash (used for) provided by financing activities	$	(40.1	)	$	101.7
Partnership
Net cash provided by operating activities	$	113.2		$	109.7
Net cash used for investing activities	$	(38.3	)	$	(188.9	)
Net cash (used for) provided by financing activities	$	(40.1	)	$	101.7

Operating Activities

Cash flows from operating activities provide the cash necessary to meet normal operational requirements of our Rental Operations and Service Operations 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 three months ended March 31, 2017, was due to increasing our investment in industrial properties and lower cash paid for interest, as the result of the significant debt repayments and refinancings that took place throughout 2017, partially offset by the impact of the disposal of our medical office properties during 2017.

Investing Activities

Highlights of significant cash sources and uses are as follows:

• During the three months ended March 31, 2018, we paid cash of $22.8 million and $67.3 million, respectively, for real estate and undeveloped land acquisitions, compared to $114.4 million and $50.4 million for real estate and undeveloped land acquisitions in the same period in 2017.

• Real estate development costs were $104.3 million during the three months ended March 31, 2018, compared to $112.7 million for the same period in 2017.

• Sales of land and depreciated properties provided $131.4 million in net proceeds for the three months ended March 31, 2018, compared to $103.1 million for the same period in 2017.

• The increased cash inflows reflected in the Other Assets line of the Consolidated Statements of Cash Flows for the three months ended March 31, 2018 was the result of receiving repayments of $39.8 million on two seller-financed mortgages. There were no such repayments in 2017.

• Second generation tenant improvements, leasing costs and building improvements totaled $14.1 million for the three months ended March 31, 2018 compared to $10.4 million for the same period in 2017.

• For the three months ended March 31, 2018, we received $9.4 million in capital distributions from unconsolidated joint ventures, primarily related to the sale of four properties within two of our joint ventures, compared to $4.9 million during the same period in 2017.

Financing Activities

The following items highlight significant capital transactions:

• During the three months ended March 31, 2018, the Partnership repaid one secured loan for $215,000. The Partnership repaid two secured loans for $15.9 million during the same period in 2017.

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• For the three months ended March 31, 2018, the Partnership increased net borrowings on the Partnership's unsecured line of credit by $75.0 million, compared to an increase of $189.0 million of net borrowings for the same period in 2017.

• We paid regular cash dividends or distributions totaling $71.4 million and $67.6 million for the three months ended March 31, 2018 and 2017, respectively.

• Changes in book cash overdrafts are classified as financing activities within our consolidated Statements of Cash Flows. Book cash overdrafts were $2.9 million and $20.6 million at March 31, 2018 and 2017, respectively.

Off Balance Sheet Arrangements - Investments in Unconsolidated Joint Ventures

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 limited partners (or similar owning entities) that lack substantive participating or kick out rights and (iii) establish whether or not 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 March 31, 2018.

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 operation and development of industrial 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 joint ventures represented approximately 2% of our total assets at March 31, 2018 and December 31, 2017. Total assets of our unconsolidated joint ventures were $523.9 million and $556.2 million at March 31, 2018 and December 31, 2017, respectively. The combined revenues of our unconsolidated joint ventures totaled $15.1 million and $21.5 million for the three months ended March 31, 2018 and 2017, respectively.

We have guaranteed the repayment of certain secured and unsecured loans of our unconsolidated joint ventures. The outstanding balances on the guaranteed portion of these loans totaled $102.9 million at March 31, 2018.

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.

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.

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	Remainder of 2018			2019			2020			2021			2022			Thereafter			Face Value			Fair Value
Fixed rate secured debt	$	3,438		$	272,215		$	3,583		$	12,163		$	3,311		$	13,178		$	307,888		$	320,652
Weighted average interest rate	6.50		%	7.63		%	5.98		%	5.73		%	6.06		%	6.07		%	7.44		%
Variable rate secured debt	$	300		$	300		$	300		$	300		$	300		$	1,000		$	2,500		$	2,500
Weighted average interest rate	1.67		%	1.67		%	1.67		%	1.67		%	1.67		%	1.67		%	1.67		%
Fixed rate unsecured debt	$	2,030		$	2,858		$	1,498		$	250,000		$	600,000		$	1,275,000		$	2,131,386		$	2,129,390
Weighted average interest rate	6.26		%	6.26		%	6.26		%	3.91		%	4.20		%	3.72		%	3.88		%
Variable rate unsecured line of credit*	$	—		$	—		$	—		$	—		$	—		$	75,000		$	75,000		$	75,000
Rate at March 31, 2018	N/A			N/A			N/A			N/A			N/A			2.75		%	2.75		%

*The Partnership’s unsecured line of credit is reflected in the table above as maturing in January 2023, based on the ability to exercise the two six-month extension options from its stated maturity date of January 2022 (see Note 6).

As the above table incorporates only those exposures that existed at March 31, 2018, 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 and our hedging strategies at that time. Interest expense on our unsecured line of credit, to the extent we have outstanding borrowings, 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.

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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.

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.

43

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 March 31, 2018, 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 2017 Annual Report. The risks and uncertainties described in our 2017 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. There have not been any material changes to the risk factors that we face since our 2017 Annual Report.

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 31, 2018, 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 three months ended March 31, 2018.

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.

44

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	Fifth Amended and Restated Bylaws of the General Partner (filed as Exhibit 3.1 to the General Partner's Current Report on Form 8-K as filed with the SEC on October 26, 2017, 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).
11.1	Statement Regarding Computation of Earnings.***
12.1	Statement of Calculation 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 Calculation 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.**
101.Def	Definition Linkbase Document
101.Pre	Presentation Linkbase Document
101.Lab	Labels Linkbase Document
101.Cal	Calculation Linkbase Document
101.Sch	Schema Document
101.Ins	Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document

45

#	Represents management contract or compensatory plan or arrangement
*	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 8 to the Consolidated Financial Statements included in this Report.

46

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

Chairman and Chief Executive Officer

/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
		Chairman and Chief Executive Officer of the General Partner
		/s/ Mark A. Denien
		Mark A. Denien
		Executive Vice President and Chief Financial Officer of the General Partner
Date:	May 4, 2018

47

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)

	Three Months Ended March 31, 2018		Year Ended December 31, 2017		Year Ended December 31, 2016		Year Ended December 31, 2015		Year Ended December 31, 2014		Year Ended December 31, 2013
Net income from continuing operations, less preferred dividends	$	73,524	$	290,592	$	298,421	$	188,248	$	196,219	$	45,338
Preferred dividends	—		—		—		—		24,943		31,616
Interest expense from continuing operations	20,000		87,003		112,757		138,258		162,108		168,327
Earnings before fixed charges, continuing operations	$	93,524	$	377,595	$	411,178	$	326,506	$	383,270	$	245,281
Interest expense from discontinued operations	—		14,736		28,819		40,911		58,426		71,496
Earnings before fixed charges	$	93,524	$	392,331	$	439,997	$	367,417	$	441,696	$	316,777
Interest expense from continuing operations	$	20,000	$	87,003	$	112,757	$	138,258	$	162,108	$	168,327
Interest costs capitalized	8,094		18,885		16,099		16,764		17,620		16,756
Total fixed charges, continuing operations	28,094		105,888		128,856		155,022		179,728		185,083
Interest expense from discontinued operations	—		14,736		28,819		40,911		58,426		71,496
Total fixed charges	28,094		120,624		157,675		195,933		238,154		256,579
Preferred dividends	—		—		—		—		24,943		31,616
Total fixed charges and preferred dividends, continuing operations	$	28,094	$	105,888	$	128,856	$	155,022	$	204,671	$	216,699
Total fixed charges and preferred dividends	$	28,094	$	120,624	$	157,675	$	195,933	$	263,097	$	288,195
Ratio of earnings to fixed charges, continuing operations	3.33		3.57		3.19		2.11		2.13		1.33
Ratio of earnings to fixed charges and preferred dividends, continuing operations	3.33		3.57		3.19		2.11		1.87		1.13
Ratio of earnings to fixed charges	3.33		3.25		2.79		1.88		1.85		1.23
Ratio of earnings to fixed charges and preferred dividends	3.33		3.25		2.79		1.88		1.68		1.10

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)

	Three Months Ended March 31, 2018		Year Ended December 31, 2017		Year Ended December 31, 2016		Year Ended December 31, 2015		Year Ended December 31, 2014		Year Ended December 31, 2013
Net income from continuing operations, less preferred distributions	$	73,524	$	290,592	$	298,421	$	188,248	$	196,219	$	45,338
Preferred distributions	—		—		—		—		24,943		31,616
Interest expense from continuing operations	20,000		87,003		112,757		138,258		162,108		168,327
Earnings before fixed charges, continuing operations	$	93,524	$	377,595	$	411,178	$	326,506	$	383,270	$	245,281
Interest expense from discontinued operations	—		14,736		28,819		40,911		58,426		71,496
Earnings before fixed charges	$	93,524	$	392,331	$	439,997	$	367,417	$	441,696	$	316,777
Interest expense from continuing operations	$	20,000	$	87,003	$	112,757	$	138,258	$	162,108	$	168,327
Interest costs capitalized	8,094		18,885		16,099		16,764		17,620		16,756
Total fixed charges, continuing operations	28,094		105,888		128,856		155,022		179,728		185,083
Interest expense from discontinued operations	—		14,736		28,819		40,911		58,426		71,496
Total fixed charges	28,094		120,624		157,675		195,933		238,154		256,579
Preferred distributions	—		—		—		—		24,943		31,616
Total fixed charges and preferred distributions, continuing operations	$	28,094	$	105,888	$	128,856	$	155,022	$	204,671	$	216,699
Total fixed charges and preferred distributions	$	28,094	$	120,624	$	157,675	$	195,933	$	263,097	$	288,195
Ratio of earnings to fixed charges, continuing operations	3.33		3.57		3.19		2.11		2.13		1.33
Ratio of earnings to fixed charges and preferred distributions, continuing operations	3.33		3.57		3.19		2.11		1.87		1.13
Ratio of earnings to fixed charges	3.33		3.25		2.79		1.88		1.85		1.23
Ratio of earnings to fixed charges and preferred distributions	3.33		3.25		2.79		1.88		1.68		1.10

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: May 4, 2018

/s/ James B. Connor

James B. Connor

Chairman 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: May 4, 2018

/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: May 4, 2018

/s/ James B. Connor

James B. Connor

Chairman 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: May 4, 2018

/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 March 31, 2018 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
Chairman and Chief Executive Officer
Date:	May 4, 2018

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 March 31, 2018 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:	May 4, 2018

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 March 31, 2018 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
Chairman and Chief Executive Officer of the General Partner
Date:	May 4, 2018

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 March 31, 2018 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:	May 4, 2018

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.

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Document and Entity Information - $ / shares	3 Months Ended
	Mar. 31, 2018	May 03, 2018	Dec. 31, 2017
Entity Information [Line Items]
Common shares, par value	$ 0.01		$ 0.01
Entity Registrant Name	DUKE REALTY CORPORATION
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	Mar. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		357,030,140
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	Mar. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes

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Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
ASSETS
Real Estate Assets	$ 6,608,594	$ 6,593,567
Construction in progress	441,484	401,407
Investments in and advances to unconsolidated joint ventures	121,576	126,487
Undeveloped land	259,842	226,987
Real estate investment property, at cost, total	7,431,496	7,348,448
Accumulated depreciation	(1,238,688)	(1,193,905)
Net real estate investments	6,192,808	6,154,543
Real estate investments and other assets held-for-sale	21,740	17,550
Cash and cash equivalents	160,861	67,562
Accounts receivable, net of allowance	21,939	19,427
Straight-line rent receivable, net of allowance	97,266	93,005
Receivables on construction contracts, including retentions	16,692	13,480
Deferred leasing and other costs, net of accumulated amortization	297,103	292,682
Restricted cash held in escrow for like-kind exchange	59,196	116,405
Notes receivable from property sales	386,789	426,657
Other escrow deposits and other assets	173,280	186,885
Total Assets	7,427,674	7,388,196
LIABILITIES AND EQUITY
Secured debt, net of deferred financing costs	310,070	311,349
Unsecured debt, net of deferred financing costs	2,111,386	2,111,542
Unsecured line of credit	75,000	0
Long-term debt, total	2,496,456	2,422,891
Liabilities related to real estate investments held-for-sale	1,327	1,163
Construction payables and amounts due subcontractors, including retentions	53,339	54,545
Accrued real estate taxes	71,234	67,374
Accrued interest	27,166	17,911
Other liabilities	152,358	210,825
Tenant security deposits and prepaid rents	44,610	39,109
Total Liabilities	2,846,490	2,813,818
Equity
Common shares	3,570	3,564
Additional paid-in capital	5,204,855	5,205,316
Distributions in excess of net income	(674,920)	(676,036)
Total shareholders' equity	4,533,505	4,532,844
Noncontrolling interests	47,679	41,534
Total Equity	4,581,184	4,574,378
Total Liabilities and Equity	7,427,674	7,388,196
Duke Realty Limited Partnership [Member]
ASSETS
Real Estate Assets	6,608,594	6,593,567
Construction in progress	441,484	401,407
Investments in and advances to unconsolidated joint ventures	121,576	126,487
Undeveloped land	259,842	226,987
Real estate investment property, at cost, total	7,431,496	7,348,448
Accumulated depreciation	(1,238,688)	(1,193,905)
Net real estate investments	6,192,808	6,154,543
Real estate investments and other assets held-for-sale	21,740	17,550
Cash and cash equivalents	160,861	67,562
Accounts receivable, net of allowance	21,939	19,427
Straight-line rent receivable, net of allowance	97,266	93,005
Receivables on construction contracts, including retentions	16,692	13,480
Deferred leasing and other costs, net of accumulated amortization	297,103	292,682
Restricted cash held in escrow for like-kind exchange	59,196	116,405
Notes receivable from property sales	386,789	426,657
Other escrow deposits and other assets	173,280	186,885
Total Assets	7,427,674	7,388,196
LIABILITIES AND EQUITY
Secured debt, net of deferred financing costs	310,070	311,349
Unsecured debt, net of deferred financing costs	2,111,386	2,111,542
Unsecured line of credit	75,000	0
Long-term debt, total	2,496,456	2,422,891
Liabilities related to real estate investments held-for-sale	1,327	1,163
Construction payables and amounts due subcontractors, including retentions	53,339	54,545
Accrued real estate taxes	71,234	67,374
Accrued interest	27,166	17,911
Other liabilities	152,358	210,825
Tenant security deposits and prepaid rents	44,610	39,109
Total Liabilities	2,846,490	2,813,818
Equity
Common equity	4,533,505	4,532,844
Limited Partners' common equity	46,706	40,563
Total partners' equity	4,580,211	4,573,407
Noncontrolling interests	973	971
Total Equity	4,581,184	4,574,378
Total Liabilities and Equity	$ 7,427,674	$ 7,388,196

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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Accounts receivable, allowance	$ 1,626	$ 1,709
Straight-line rent receivable, allowance	6,104	5,254
Deferred leasing and other costs, accumulated amortization	208,092	209,451
Debt Issuance Costs, Net	$ 20,529	$ 21,114
Common shares, par value	$ 0.01	$ 0.01
Common shares, shares authorized	600,000,000	600,000,000
Common shares, shares issued	357,025,000	356,361,000
Common shares, shares outstanding	357,025,000	356,361,000
Duke Realty Limited Partnership [Member]
Accounts receivable, allowance	$ 1,626	$ 1,709
Straight-line rent receivable, allowance	6,104	5,254
Deferred leasing and other costs, accumulated amortization	$ 208,092	$ 209,451
Common equity, General Partner Units issued	357,025,000	356,361,000
Common equity, General Partner Units outstanding	357,025,000	356,361,000
Limited Partner Units issued	3,402,000	3,283,000
Limited Partner Units outstanding	3,402,000	3,283,000
Secured Debt [Member]
Debt Issuance Costs, Net	$ 529	$ 614
Secured Debt [Member] | Duke Realty Limited Partnership [Member]
Debt Issuance Costs, Net	529	614
Unsecured Debt [Member]
Debt Issuance Costs, Net	20,000	20,500
Unsecured Debt [Member] | Duke Realty Limited Partnership [Member]
Debt Issuance Costs, Net	$ 20,000	$ 20,500

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Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues:
Rental and related revenue	$ 193,456	$ 171,676
General contractor and service fee revenue	41,101	9,399
Revenues, total	234,557	181,075
Expenses:
Rental expenses	20,396	16,237
Real estate taxes	31,146	26,511
General contractor and other services expenses	40,409	7,624
Depreciation and amortization	77,529	62,023
Costs and expenses, total	169,480	112,395
Other operating activities:
Equity in earnings of unconsolidated joint ventures	8,287	4,749
Gain on sale of properties	44,886	37,046
Gain on land sales	2,949	1,505
Other operating expenses	(786)	(738)
Impairment charges	0	(859)
General and administrative expenses	(21,023)	(19,232)
Other Operating Activities, Net	34,313	22,471
Operating income	99,390	91,151
Other income (expenses):
Interest and other income, net	4,463	533
Interest expense	(20,000)	(24,162)
Gain on debt extinguishment	0	25
Income from continuing operations before income taxes	83,853	67,547
Income tax expense	(10,329)	(2,132)
Income from continuing operations	73,524	65,415
Discontinued operations:
(Loss) income before gain on sales and income tax	(8)	5,366
Gain on sale of depreciable properties	132	0
Income from discontinued operations	124	5,366
Net income	73,648	70,781
Net income attributable to noncontrolling interests	(685)	(581)
Net income attributable to common shareholders	$ 72,963	$ 70,200
Basic net income per common share/unit:
Continuing operations attributable to common shareholders/unitholders	$ 0.20	$ 0.18
Discontinuing operations attributable to common shareholders/unitholders	0	0.02
Earnings Per Share, Basic	0.20	0.20
Diluted net income per common share/unit:
Continuing operations attributable to common shareholders/unitholders	0.20	0.18
Discontinued operations attributable to common shareholders/unitholders	0	0.02
Earnings Per Share, Diluted	$ 0.20	$ 0.20
Weighted average number of common shares/units outstanding	356,740	355,282
Weighted average number of common shares/units and potential dilutive securities	360,400	360,700
Comprehensive income:
Net income	$ 73,648	$ 70,781
Other comprehensive loss:
Amortization of interest contracts	0	(256)
Comprehensive income	73,648	70,525
Duke Realty Limited Partnership [Member]
Revenues:
Rental and related revenue	193,456	171,676
General contractor and service fee revenue	41,101	9,399
Revenues, total	234,557	181,075
Expenses:
Rental expenses	20,396	16,237
Real estate taxes	31,146	26,511
General contractor and other services expenses	40,409	7,624
Depreciation and amortization	77,529	62,023
Costs and expenses, total	169,480	112,395
Other operating activities:
Equity in earnings of unconsolidated joint ventures	8,287	4,749
Gain on sale of properties	44,886	37,046
Gain on land sales	2,949	1,505
Other operating expenses	(786)	(738)
Impairment charges	0	(859)
General and administrative expenses	(21,023)	(19,232)
Other Operating Activities, Net	34,313	22,471
Operating income	99,390	91,151
Other income (expenses):
Interest and other income, net	4,463	533
Interest expense	(20,000)	(24,162)
Gain on debt extinguishment	0	25
Income from continuing operations before income taxes	83,853	67,547
Income tax expense	(10,329)	(2,132)
Income from continuing operations	73,524	65,415
Discontinued operations:
(Loss) income before gain on sales and income tax	(8)	5,366
Gain on sale of depreciable properties	132	0
Income from discontinued operations	124	5,366
Net income	73,648	70,781
Net (income) loss attributable to noncontrolling interests	(2)	71
Net income attributable to common shareholders	$ 73,646	$ 70,852
Basic net income per common share/unit:
Continuing operations attributable to common shareholders/unitholders	$ 0.20	$ 0.18
Discontinuing operations attributable to common shareholders/unitholders	0	0.02
Earnings Per Share, Basic	0.20	0.20
Diluted net income per common share/unit:
Continuing operations attributable to common shareholders/unitholders	0.20	0.18
Discontinued operations attributable to common shareholders/unitholders	0	0.02
Earnings Per Share, Diluted	$ 0.20	$ 0.20
Weighted average number of common shares/units outstanding	360,095	358,598
Weighted average number of common shares/units and potential dilutive securities	360,400	360,700
Comprehensive income:
Net income	$ 73,648	$ 70,781
Other comprehensive loss:
Amortization of interest contracts	0	(256)
Comprehensive income	$ 73,648	$ 70,525

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Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income	$ 73,648	$ 70,781
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	63,944	66,172
Amortization of deferred leasing and other costs	13,585	15,385
Amortization of deferred financing costs	1,418	1,316
Straight-line rental income and expense, net	(6,288)	(2,928)
Impairment charges	0	859
Loss on debt extinguishment	0	(25)
Gains on land and depreciated property sales	(47,967)	(38,551)
Third-party construction contracts, net	(367)	714
Other accrued revenues and expenses, net	19,862	(3,733)
Operating distributions received less than equity in earnings from unconsolidated joint ventures	(4,673)	(282)
Net cash provided by operating activities	113,162	109,708
Cash flows from investing activities:
Development of real estate investments	(104,346)	(112,727)
Acquisition of real estate investments and related intangible assets	(22,801)	(114,369)
Acquisition of undeveloped land	(67,256)	(50,436)
Second generation tenant improvements, leasing costs and building improvements	(14,102)	(10,431)
Other deferred leasing costs	(9,798)	(4,398)
Other assets	39,183	(4,186)
Proceeds from land and depreciated property sales, net	131,380	103,120
Capital distributions from unconsolidated joint ventures	9,404	4,858
Capital contributions and advances to unconsolidated joint ventures	0	(297)
Net cash used for investing activities	(38,336)	(188,866)
Cash flows from financing activities:
Proceeds from issuance of common shares, net	706	786
Payments on unsecured debt	(656)	(616)
Payments on secured indebtedness including principal amortization	(1,345)	(17,539)
Borrowings on line of credit, net	75,000	189,000
Distributions to common shareholders/unitholders	(71,398)	(67,554)
Distributions to Noncontrolling Interest	(680)	(640)
Tax payments on stock-based compensation awards	(7,984)	(8,848)
Change in book overdrafts	(33,448)	7,115
Deferred financing costs	(285)	(7)
Net cash (used for) provided by financing activities	(40,090)	101,697
Net increase in cash, cash equivalents and restricted cash	34,736	22,539
Cash, cash equivalents and restricted cash at beginning of period	193,627	57,038
Cash, cash equivalents and restricted cash at end of period	228,363	79,577
Noncash investing and financing activities:
Conversion of Limited Partner Units to common shares	0	1,685
Duke Realty Limited Partnership [Member]
Cash flows from operating activities:
Net income	73,648	70,781
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	63,944	66,172
Amortization of deferred leasing and other costs	13,585	15,385
Amortization of deferred financing costs	1,418	1,316
Straight-line rental income and expense, net	(6,288)	(2,928)
Impairment charges	0	859
Loss on debt extinguishment	0	(25)
Gains on land and depreciated property sales	(47,967)	(38,551)
Third-party construction contracts, net	(367)	714
Other accrued revenues and expenses, net	19,862	(3,733)
Operating distributions received less than equity in earnings from unconsolidated joint ventures	(4,673)	(282)
Net cash provided by operating activities	113,162	109,708
Cash flows from investing activities:
Development of real estate investments	(104,346)	(112,727)
Acquisition of real estate investments and related intangible assets	(22,801)	(114,369)
Acquisition of undeveloped land	(67,256)	(50,436)
Second generation tenant improvements, leasing costs and building improvements	(14,102)	(10,431)
Other deferred leasing costs	(9,798)	(4,398)
Other assets	39,183	(4,186)
Proceeds from land and depreciated property sales, net	131,380	103,120
Capital distributions from unconsolidated joint ventures	9,404	4,858
Capital contributions and advances to unconsolidated joint ventures	0	(297)
Net cash used for investing activities	(38,336)	(188,866)
Cash flows from financing activities:
Contributions from the General Partner	706	786
Payments on unsecured debt	(656)	(616)
Payments on secured indebtedness including principal amortization	(1,345)	(17,539)
Borrowings on line of credit, net	75,000	189,000
Distributions to common shareholders/unitholders	(72,078)	(68,184)
Distributions to Noncontrolling Interest	0	(10)
Tax payments on stock-based compensation awards	(7,984)	(8,848)
Change in book overdrafts	(33,448)	7,115
Deferred financing costs	(285)	(7)
Net cash (used for) provided by financing activities	(40,090)	101,697
Net increase in cash, cash equivalents and restricted cash	34,736	22,539
Cash, cash equivalents and restricted cash at beginning of period	193,627	57,038
Cash, cash equivalents and restricted cash at end of period	228,363	79,577
Noncash investing and financing activities:
Conversion of Limited Partner Units to common shares	$ 0	$ 1,685

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Consolidated Statement of Changes in Equity - 3 months ended Mar. 31, 2018 - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Distributions in Excess of Net Income [Member]	Non-controlling Interest [Member]	Duke Realty Limited Partnership [Member]	Duke Realty Limited Partnership [Member] Common Stock [Member]	Duke Realty Limited Partnership [Member] Limited Partners' Common Equity [Member]	Duke Realty Limited Partnership [Member] Non-controlling Interest [Member]	Duke Realty Limited Partnership [Member] Stockholders' Equity, Total [Member]
Beginning Balance - General Partner at Dec. 31, 2017	$ 4,574,378	$ 3,564	$ 5,205,316	$ (676,036)	$ 41,534
Beginning Balance - Partnership at Dec. 31, 2017						$ 4,574,378	$ 4,532,844	$ 40,563	$ 971	$ 4,573,407
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	73,648			72,963	685	73,648	72,963	683	2	73,646
Issuance of common shares	706		706
Capital contribution from the General Partner						706	706			706
Stock based compensation plan activity	4,530	6	(1,167)	(449)	6,140	4,530	(1,610)	6,140		4,530
Distributions to Partners						(72,078)	(71,398)	(680)		(72,078)
Distributions to common shareholders	(71,398)			(71,398)
Distributions to noncontrolling interests	(680)				(680)
Ending Balance - General Partner at Mar. 31, 2018	$ 4,581,184	$ 3,570	$ 5,204,855	$ (674,920)	$ 47,679
Ending Balance - Partnership at Mar. 31, 2018						$ 4,581,184	$ 4,533,505	$ 46,706	$ 973	$ 4,580,211

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Consolidated Statement of Changes in Equity (Parenthetical)	3 Months Ended
	Mar. 31, 2018 $ / shares
Distributions to common shareholders, per share	$ 0.20
Duke Realty Limited Partnership [Member]
Distributions to Partners, per Common Unit	$ 0.20

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General Basis of Presentation (Notes)

3 Months Ended

Mar. 31, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

General Basis of Presentation

General Basis of Presentation

The interim consolidated financial statements included herein have been prepared by the General Partner and the Partnership. The 2017 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, 2017 (the "2017 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 2017 Annual Report.

The General Partner was formed in 1985, and we believe that it qualifies as a REIT under the provisions of the Internal Revenue Code of 1986, as amended (the "Code"). The Partnership was formed on October 4, 1993, when the General Partner contributed all of its properties and related assets and liabilities, together with the net proceeds from an offering of additional shares of its common stock, to the Partnership. Simultaneously, the Partnership completed the acquisition of Duke Associates, a full-service commercial real estate firm operating in the Midwest whose operations began in 1972.

The General Partner is the sole general partner of the Partnership, owning approximately 99.1% of the Common Units at March 31, 2018. The remaining 0.9% of the Common Units are owned by limited partners. As the sole general partner of the Partnership, the General Partner has full, exclusive and complete responsibility and discretion in the day-to-day management and control of the Partnership. The General Partner and the Partnership are operated as one enterprise. The management of the General Partner consists of the same members as the management of the Partnership. As the sole general partner with control of the Partnership, the General Partner consolidates the Partnership for financial reporting purposes, and the General Partner does not have any significant assets other than its investment in the Partnership. Therefore, the assets and liabilities of the General Partner and the Partnership are substantially the same.

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

As of March 31, 2018, we owned and operated a portfolio primarily consisting of industrial properties and provided real estate services to third-party owners. Substantially all of our Rental Operations (see Note 9) are conducted through the Partnership. We conduct our Service Operations (see Note 9) 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 Pronouncements (Notes)

3 Months Ended

Mar. 31, 2018

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

New Accounting Pronouncements, Policy [Policy Text Block]

New Accounting Pronouncements

Recently Adopted Accounting Pronouncements

Revenue Recognition and De-recognition of Non-Financial Assets

On January 1, 2018, we concurrently adopted Accounting Standards Codification ("ASC") 606, Revenue from Contracts with Customers ("ASC 606") and ASC 610-20, Other Income: Gains and Losses from the De-recognition of Non-financial Assets ("ASC 610-20") using a modified retrospective ("cumulative effect") method of adoption. ASC 606 has superseded nearly all existing GAAP revenue recognition guidance, although its scope excludes lease contracts which represent our primary source of revenue. 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.

General Contractor and Service Fee Revenue

Beginning with the January 1, 2018 adoption date, general contractor and service fee revenues, as presented on the Consolidated Statements of Operations, are accounted for within the scope of ASC 606. General contractor and service fee revenues are comprised primarily of construction and development related revenues earned from third parties while acting in capacity of a developer, as a general contractor or a construction manager. There are other ancillary streams of revenue included in general contractor and service fee revenues (see Note 9), such as management fees earned from unconsolidated joint ventures, which are not significant. Opening and closing balances of construction receivables are presented separately on the Consolidated Balance Sheets. Over billed construction receivables totaled $295,000 and $276,000 at March 31, 2018 and December 31, 2017, respectively. We generally do not have any contract assets associated with our construction arrangements.

Our construction arrangements are typically structured with only one performance obligation, which generally represents either an obligation to construct a new building or to construct fixtures in an existing building, and these single performance obligations are satisfied over time as construction progresses. We recognize revenue as we satisfy such performance obligations using the percentage of completion method, which is an input method allowed under ASC 606. Using this method, profits are recorded based on our estimates of the percentage of completion of individual contracts, commencing when the work performed under the contracts reaches a point where the final costs can be estimated with reasonable accuracy. The percentage of completion estimates are based on a comparison of the contract expenditures incurred to the estimated final costs. We believe the percentage of completion method is a faithful depiction of the transfer of goods and services as changes in job performance and estimated profitability, which result in revisions to costs and income and are recognized in the period in which the revisions are determined, have not historically been significant. We typically receive regular progress payments on the majority of our construction arrangements and such arrangements generally have an original duration of less than one year.

As the result of the relatively short duration of our construction arrangements, we have elected to apply the optional disclosure exemptions, included in ASC 606, related to our remaining performance obligations for our in-process construction projects, for which any future variable consideration is not material.

De-Recognition of Non-Financial Assets

ASC 610-20 provides guidance on how entities recognize sales, including partial sales, of non-financial assets (and in-substance non-financial assets) to non-customers. ASC 606 includes guidance governing the sale of non-financial assets with customers, while sales of non-financial assets to non-customers are governed by ASC 610-20. The only difference in the treatment of sales to customers and non-customers is the presentation in the Consolidated Statements of Operations (revenue and expense is reported when the sale is to a customer and net gain or loss is reported when the sale is to a non-customer). Based on the nature of our business, we have concluded that our property sales represent transactions with non-customers. In the typical course of our business, sales of non-financial assets represent only one performance obligation and are recognized when an enforceable contract is in place, collectability is ensured and control is transferred to the buyer.

ASC 610-20 also requires the seller to recognize a full gain or loss in a partial sale of non-financial assets, to the extent control is not retained. Any noncontrolling interest retained by the seller would, accordingly, be measured at fair value. We have primarily disposed of property and land in all cash transactions with no contingencies and no future involvement in the operations, and therefore, the adoption of ASC 610-20 has not significantly impacted the recognition of property and land sales.

There was no cumulative adjustment recognized to beginning retained earnings as of January 1, 2018 as the result of adopting ASC 606 and ASC 610-20.

Restricted Cash

In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows: Restricted Cash ("ASU 2016-18"). ASU 2016-18 requires entities to show the changes in the total of cash, cash equivalents and restricted cash in the statement of cash flows. As a result, entities will no longer present transfers between cash, cash equivalents and restricted cash in the statement of cash flows. We adopted this standard on January 1, 2018, on a retrospective basis, and the adoption did not have a material impact on our consolidated financial statements.

The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the Consolidated Balance Sheets that sum to the total of the same such amounts shown in the Consolidated Statements of Cash Flows (in thousands):

	March 31, 2018		December 31, 2017
Cash and cash equivalents	$	160,861	$	67,562
Restricted cash held in escrow for like-kind exchange	59,196		116,405
Restricted cash included in other escrow deposits and other assets	8,306		9,660
Total cash, cash equivalents, and restricted cash shown in the Consolidated Statements of Cash Flows	$	228,363	$	193,627

Restricted cash held in escrow for like-kind exchange on the Consolidated Balance Sheets includes cash received from the property dispositions but restricted only for qualifying like-kind exchange transactions.

Statement of Cash Flows

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows ("ASU 2016-15"). ASU 2016-15 clarifies how entities should classify certain cash receipts and cash payments on the statement of cash flows and how the predominance principle should be applied when cash receipts and cash payments have aspects of more than one class of cash flows. We adopted this standard on January 1, 2018, on a retrospective basis, and the adoption did not have a material impact on our consolidated financial statements.

New Accounting Pronouncement Not Yet Adopted

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.

For lessors, the accounting under ASU 2016-02 will remain largely unchanged from current GAAP; however ASU 2016-02 requires that lessors expense certain initial direct costs, which are capitalizable under existing leasing standards, as incurred. ASU 2016-02 also specifies that payments for certain lease-related services, which are often included in lease agreements, represent "non-lease" components that will become subject to the guidance in ASC 606, when ASU 2016-02 becomes effective. The FASB recently clarified that only new or modified leases subsequent to adoption of ASU 2016-02 will require different accounting for "non-lease" components under the guidance in ASC 606. Additionally, on March 28, 2018 the FASB tentatively approved amendments to ASU

2016-02 (the "Approved Amendments"), which, if ultimately finalized as an amendment to ASU 2016-02, will allow lessors an optional election to not separate "non-lease" components from the related lease components. This election would be contingent upon certain conditions being met, including a requirement that separating the "non-lease" components would not result in a change in the timing and pattern of the revenue recognition.

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 classification. ASU 2016-02 will impact the accounting and disclosure requirements for ground leases, and other operating leases, where we are the lessee.

ASU 2016-02 will be effective for us on January 1, 2019 under the modified retrospective approach, 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 (i) relief from re-assessing whether an expired or existing contract meets the definition of a lease, (ii) relief from re-assessing the classification of expired or existing leases at the adoption date and (iii) allowing previously capitalized initial direct leasing costs to continue to be amortized. In addition to these practical expedients, the Approved Amendments also include an option that would allow lessors to use the effective date of ASU 2016-02 as the date of initial application, without restating comparative periods, and to recognize a cumulative effect adjustment as of the effective date. We are currently assessing the method of adoption and the impact that ASU 2016-02 will have on our consolidated financial statements but have tentatively concluded that we will apply the practical expedients as well as the optional relief provided by the Approved Amendments, should they be finalized.

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Reclassifications	3 Months Ended
	Mar. 31, 2018
Disclosure Text Block [Abstract]
Reclassifications	ReclassificationsCertain amounts in the accompanying consolidated financial statements that have been reclassified to conform to the 2018 consolidated financial statement presentation include the change in presentation for properties determined to be discontinued operations (see Note 10).

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Variable Interest Entities

3 Months Ended

Mar. 31, 2018

Disclosure Text Block [Abstract]

Consolidation Policy for VIEs

Variable Interest Entities

Partnership

Due to the fact that the Limited Partners do not have kick out rights, or substantive participating rights, the Partnership is a variable interest entity ("VIE"). Because the General Partner holds majority ownership and exercises control over every aspect of the Partnership's operations, the General Partner has been determined as the primary beneficiary and, therefore, consolidates 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 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 and (iii) establish whether or not 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. Consolidated joint ventures that are VIEs are not significant in any period presented in these consolidated financial statements.

To the extent that our joint ventures do not qualify as VIEs, they are consolidated if we control them through majority ownership interests or if we are the managing entity (general partner or managing member) and the other partner does not have substantive participating rights. Control is further demonstrated by our ability to unilaterally make significant operating decisions, refinance debt and sell the assets of the joint venture without the consent of the non-managing entity and the inability of the non-managing entity to remove us from our role as the managing entity. Consolidated joint ventures that are not VIEs are not significant in any period presented in these consolidated financial statements.

There were no unconsolidated joint ventures, in which we have any recognized assets or liabilities or have retained any economic exposure to loss at March 31, 2018, that met the criteria to be considered VIEs. Our maximum loss exposure for guarantees of unconsolidated joint venture indebtedness, none of which relate to VIEs, totaled $102.9 million at March 31, 2018.

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Acquisitions and Dispositions

3 Months Ended

Mar. 31, 2018

Real Estate [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 and to increase our overall investments in quality industrial projects. 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. Transaction costs related to asset acquisitions are capitalized and transaction costs related to business combinations and dispositions are expensed.

Acquisitions

We acquired two properties during the three months ended March 31, 2018. We determined that these two properties did not meet the definition of a business and, accordingly, we accounted for them as asset acquisitions as opposed to business combinations.

The following table summarizes amounts recognized for each major class of assets and liability (in thousands) for these acquisitions during the three months ended March 31, 2018:

Real estate assets	$	21,537
Lease related intangible assets	1,693
Total acquired assets	23,230
Below market lease liability	367
Fair value of acquired net assets	$	22,863

The leases in the acquired properties had a weighted average remaining life at acquisition of approximately 7.4 years.

Fair Value Measurements

We determine the fair value of the individual components of real estate asset acquisitions primarily through calculating the "as-if vacant" value of a building, using an income approach, which relies 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 used in calculating the "as-if vacant" value for acquisition activity during the three months ended March 31, 2018 are as follows: 

	Low	High
Exit capitalization rate	4.50%	4.50%
Net rental rate per square foot	$9.12	$10.20

Capitalized acquisition costs were insignificant and the fair value of the two properties acquired during the three months ended March 31, 2018 was substantially the same as the cost of acquisition.

Dispositions

Dispositions of buildings and undeveloped land generated net cash proceeds of $131.4 million and $103.1 million during the three months ended March 31, 2018 and 2017, respectively. The number of buildings sold, as well as their classification between continuing and discontinued operations, is disclosed in Note 10.

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Indebtedness

3 Months Ended

Mar. 31, 2018

Debt Disclosure [Abstract]

Indebtedness

Indebtedness

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

	Book Value at 12/31/2017		Book Value at 3/31/2018		Fair Value at 12/31/2017		Issuances and Assumptions		Payments/Payoffs			Adjustments to Fair Value			Fair Value at 3/31/2018
Fixed rate secured debt	$	309,463	$	308,099	$	325,753	$	—	$	(1,345	)	$	(3,756	)	$	320,652
Variable rate secured debt	2,500		2,500		2,500		—		—			—			2,500
Unsecured debt	2,132,042		2,131,386		2,190,548		—		(656		)	(60,502		)	2,129,390
Unsecured line of credit	—		75,000		—		75,000		—			—			75,000
Total	$	2,444,005	$	2,516,985	$	2,518,801	$	75,000	$	(2,001	)	$	(64,258	)	$	2,527,542
Less: Deferred financing costs	21,114		20,529
Total indebtedness as reported on the consolidated balance sheets	$	2,422,891	$	2,496,456

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 3.90% to 4.00%, 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 three months ended March 31, 2018, we repaid one fixed rate secured loan, totaling $215,000, which had a stated interest rate of 5.55%.

Unsecured Debt

At March 31, 2018, 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 95.00% to 122.00% of face value.

The indentures (and related supplemental indentures) governing our outstanding series of unsecured notes also require us to comply with financial ratios and other covenants regarding our operations. We were in compliance with all such financial covenants at March 31, 2018.

Unsecured Line of Credit

Our unsecured line of credit at March 31, 2018 is described as follows (in thousands):

Description	Borrowing Capacity		Maturity Date	Outstanding Balance at March 31, 2018
Unsecured Line of Credit - Partnership	$	1,200,000	January 30, 2022	$	75,000

The Partnership's unsecured line of credit has an interest rate on borrowings of LIBOR plus 0.875% (equal to 2.75% for outstanding borrowings at March 31, 2018) and has a maturity date of January 30, 2022, with options to extend until January 30, 2023. Subject to certain conditions, the terms also include an option to increase the facility by up to an additional $800.0 million, for a total of up to $2.00 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 March 31, 2018, we were in compliance with all financial covenants under this line of credit.

We utilize a discounted cash flow methodology in order to estimate the fair value of outstanding borrowings on 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. The current market rate is internally estimated and therefore is primarily based upon a level 3 input.

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Related Party Transactions

3 Months Ended

Mar. 31, 2018

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 joint ventures 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 joint ventures, prior to the elimination of our ownership percentage (in thousands): 

	Three Months Ended
	March 31,
	2018		2017
Management fees	$	442	$	811
Leasing fees	302		434
Construction and development fees	697		624

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Net Income (Loss) Per Common Share

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Net Income (Loss) Per Common Share

Net Income per Common Share or Common Unit

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

Diluted net income per common share is computed by dividing the sum of net income attributable to common shareholders and the noncontrolling interest in earnings allocable to Limited Partner Units (to the extent the Limited Partner Units are dilutive), less dividends or distributions on participating securities that are anti-dilutive, by the sum of the weighted average number of common shares outstanding and, to the extent they are dilutive, weighted average number of Limited Partner Units outstanding and any potential dilutive securities for the period. Diluted net income per Common Unit is computed by dividing the net income attributable to common unitholders, less dividends or distributions on participating securities that are anti-dilutive, by the sum of the weighted average number of Common Units outstanding and any potential dilutive securities for the period. The following table reconciles the components of basic and diluted net income per common share or Common Unit (in thousands): 

	Three Months Ended March 31,
	2018			2017
General Partner
Net income attributable to common shareholders	$	72,963		$	70,200
Less: dividends on participating securities	(437		)	(542		)
Basic net income attributable to common shareholders	72,526			69,658
Add back dividends on dilutive participating securities	—			305
Noncontrolling interest in earnings of common unitholders	683			652
Diluted net income attributable to common shareholders	$	73,209		$	70,615
Weighted average number of common shares outstanding	356,740			355,282
Weighted average Limited Partner Units outstanding	3,355			3,316
Other potential dilutive shares	305			2,102
Weighted average number of common shares and potential dilutive securities	360,400			360,700
Partnership
Net income attributable to common unitholders	$	73,646		$	70,852
Less: distributions on participating securities	(437		)	(542		)
Basic net income attributable to common unitholders	$	73,209		$	70,310
Add back distributions on dilutive participating securities	—			305
Diluted net income attributable to common unitholders	$	73,209		$	70,615
Weighted average number of Common Units outstanding	360,095			358,598
Other potential dilutive units	305			2,102
Weighted average number of Common Units and potential dilutive securities	360,400			360,700

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 March 31,
	2018	2017
General Partner and Partnership
Other potential dilutive shares or units:
Anti-dilutive outstanding potential shares or units under fixed stock option and other stock-based compensation plans	—	—
Anti-dilutive outstanding participating securities	2,272	1,389

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Segment Reporting

3 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

Segment Reporting

Segment Reporting

Reportable Segments

During the year ended December 31, 2017, we completed the disposition of our medical office portfolio (the "Medical Office Portfolio Disposition"), which resulted in all of our in-service medical office properties being classified within discontinued operations with the exception of a property that did not meet the criteria for classification as held for sale at March 31, 2018. As a result of this transaction, beginning the second quarter of 2017, our medical office properties were no longer presented as a separate reportable segment, with substantially all such operating results being classified within discontinued operations. The remaining medical office property included in continuing operations no longer meets the quantitative thresholds for separate presentation, and is classified as part of our non-reportable Rental Operations. Properties that are not included in our reportable segments, because they do not by themselves meet the quantitative thresholds for separate presentation as a reportable segment, are generally referred to as non-reportable Rental Operations. Our non-reportable Rental Operations primarily include our remaining office properties and medical office property at March 31, 2018.

As of March 31, 2018, we had two reportable operating segments, the first consisting of the ownership and rental of industrial real estate investments. Our ongoing investments in new real estate investments are determined largely upon anticipated geographic trends in supply and demand for industrial buildings, as well as the real estate needs of our major tenants that operate on a national level. Our strategic initiatives and our allocation of resources have been historically based upon allocation among product types, which was consistent with our designation of reportable segments, and after having sold nearly all of our office and medical office properties we intend to increase our investment in industrial properties and treat them as a single operating and reportable segment. The operations of our industrial properties, as well as our non-reportable Rental Operations, are collectively referred to as "Rental Operations."

Our second 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." The Service Operations segment is identified as one single operating segment because the lowest level of financial results reviewed by our chief operating decision maker are the results for the Service Operations segment in total. Further, our reportable segments are managed separately because each segment requires different operating strategies and management expertise.

Revenues by Reportable Segment

The following table shows the revenues for each of the reportable segments, as well as a reconciliation to consolidated revenues (in thousands): 

	Three Months Ended March 31,
	2018		2017
Revenues
Rental Operations:
Industrial	$	189,315	$	156,882
Non-reportable Rental Operations	3,453		14,416
Service Operations	41,101		9,399
Total segment revenues	233,869		180,697
Other revenue	688		378
Consolidated revenue from continuing operations	234,557		181,075
Discontinued operations	5		46,239
Consolidated revenue	$	234,562	$	227,314

Supplemental Performance Measure

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

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

The following table shows a reconciliation of our segment-level measures of profitability to consolidated income from continuing operations before income taxes (in thousands and excluding discontinued operations): 

	Three Months Ended March 31,
	2018			2017
PNOI
Industrial	$	133,388		$	114,680
Non-reportable Rental Operations	921			927
PNOI, excluding all sold properties	134,309			115,607
PNOI from sold properties included in continuing operations	1,606			2,905
PNOI, continuing operations	$	135,915		$	118,512
Earnings from Service Operations	692			1,775
Rental Operations revenues and expenses excluded from PNOI:
Straight-line rental income and expense, net	6,289			1,577
Revenues related to lease buyouts	23			9,785
Amortization of lease concessions and above and below market rents	545			(543		)
Intercompany rents and other adjusting items	14			180
Non-Segment Items:
Equity in earnings of unconsolidated joint ventures	8,287			4,749
Interest expense	(20,000		)	(24,162		)
Depreciation and amortization expense	(77,529		)	(62,023		)
Gain on sale of properties	44,886			37,046
Impairment charges	—			(859		)
Interest and other income, net	4,463			533
General and administrative expenses	(21,023		)	(19,232		)
Gain on land sales	2,949			1,505
Other operating expenses	(786		)	(738		)
Gain on extinguishment of debt	—			25
Other non-segment revenues and expenses, net	(872		)	(583		)
Income from continuing operations before income taxes	$	83,853		$	67,547

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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Real Estate Assets, Discontinued Operations and Assets Held for Sale

3 Months Ended

Mar. 31, 2018

Discontinued Operations and Disposal Groups [Abstract]

Discontinued Operations and Assets Held for Sale

Real Estate Assets, Discontinued Operations and Assets Held for Sale

Real Estate Assets

Real estate assets, excluding assets held for sale, consisted of the following (in thousands):

	March 31, 2018		December 31, 2017
Buildings and tenant improvements	$	4,668,740	$	4,642,832
Land and improvements	1,939,854		1,950,735
Real estate assets	$	6,608,594	$	6,593,567

Discontinued Operations

The following table illustrates the number of sold or held-for-sale properties included in, or excluded from, discontinued operations in this report:

 

	Held-for-Sale at March 31, 2018	Sold Year-to-Date in 2018	Sold in 2017	Total
Total properties included in discontinued operations	—	—	81	81
Properties excluded from discontinued operations	2	6	17	25
Total properties sold or classified as held-for-sale	2	6	98	106

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 was based upon an allocable share of our consolidated unsecured interest expense, as none of the properties included in discontinued operations were encumbered by secured debt. 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 three months ended March 31, 2018 and, as such, no interest expense was allocated to discontinued operations during that period.

The following table illustrates the operational results of the buildings reflected in discontinued operations (in thousands):  

	Three Months Ended March 31,
	2018			2017
Revenues	$	5		$	46,239
Operating expenses	(13		)	(14,996		)
Depreciation and amortization	—			(19,534		)
Operating (loss) income	(8		)	11,709
Interest expense	—			(6,343		)
(Loss) income before gain on sales	(8		)	5,366
Gain on sale of depreciable properties	132			—
Income from discontinued operations	$	124		$	5,366

There were no capital expenditures for properties within discontinued operations during the three months ended March 31, 2018. Capital expenditures on a cash basis for the three months ended March 31, 2017 were $12.6 million for properties 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 noncontrolling interests (in thousands):

	Three Months Ended March 31,
	2018		2017
Income from continuing operations attributable to common shareholders	$	72,840	$	64,884
Income from discontinued operations attributable to common shareholders	123		5,316
Net income attributable to common shareholders	$	72,963	$	70,200

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.

Assets Held for Sale

At March 31, 2018, two in-service properties and ten 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 properties and land held for sale (in thousands):

	Held-for-Sale Properties Included in Continuing Operations
	March 31, 2018			December 31, 2017
Land and improvements	$	9,055		$	8,157
Buildings and tenant improvements	15,283			10,505
Undeveloped land	706			—
Accumulated depreciation	(4,824		)	(2,553		)
Deferred leasing and other costs, net	862			862
Other assets	658			579
Total assets held for sale	$	21,740		$	17,550
Total liabilities related to assets held for sale	$	1,327		$	1,163

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Subsequent Events

3 Months Ended

Mar. 31, 2018

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 April 25, 2018:

Class of stock/units	Quarterly Amount per Share or Unit	Record Date	Payment Date
Common - Quarterly	$0.20	May 16, 2018	May 31, 2018

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New Accounting Pronouncements Restricted Cash Table (Tables)

3 Months Ended

Mar. 31, 2018

Restricted Cash Equivalents [Abstract]

Restrictions on Cash and Cash Equivalents [Table Text Block]

	March 31, 2018		December 31, 2017
Cash and cash equivalents	$	160,861	$	67,562
Restricted cash held in escrow for like-kind exchange	59,196		116,405
Restricted cash included in other escrow deposits and other assets	8,306		9,660
Total cash, cash equivalents, and restricted cash shown in the Consolidated Statements of Cash Flows	$	228,363	$	193,627

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Acquisitions and Dispositions (Tables)

3 Months Ended

Mar. 31, 2018

Property, Plant and Equipment [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

The following table summarizes amounts recognized for each major class of assets and liability (in thousands) for these acquisitions during the three months ended March 31, 2018:

Real estate assets	$	21,537
Lease related intangible assets	1,693
Total acquired assets	23,230
Below market lease liability	367
Fair value of acquired net assets	$	22,863

Summary of Most Significant Assumptions Utilized in the Estimations [Table Text Block]

The most significant assumptions used in calculating the "as-if vacant" value for acquisition activity during the three months ended March 31, 2018 are as follows: 

	Low	High
Exit capitalization rate	4.50%	4.50%
Net rental rate per square foot	$9.12	$10.20

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Indebtedness (Tables)

3 Months Ended

Mar. 31, 2018

Debt Disclosure [Abstract]

Fair Value, Liabilities Measured on a Recurring Basis, Disclosure Only

The following table summarizes the book value and changes in the fair value of our debt (in thousands):

	Book Value at 12/31/2017		Book Value at 3/31/2018		Fair Value at 12/31/2017		Issuances and Assumptions		Payments/Payoffs			Adjustments to Fair Value			Fair Value at 3/31/2018
Fixed rate secured debt	$	309,463	$	308,099	$	325,753	$	—	$	(1,345	)	$	(3,756	)	$	320,652
Variable rate secured debt	2,500		2,500		2,500		—		—			—			2,500
Unsecured debt	2,132,042		2,131,386		2,190,548		—		(656		)	(60,502		)	2,129,390
Unsecured line of credit	—		75,000		—		75,000		—			—			75,000
Total	$	2,444,005	$	2,516,985	$	2,518,801	$	75,000	$	(2,001	)	$	(64,258	)	$	2,527,542
Less: Deferred financing costs	21,114		20,529
Total indebtedness as reported on the consolidated balance sheets	$	2,422,891	$	2,496,456

Unsecured Line of Credit

Our unsecured line of credit at March 31, 2018 is described as follows (in thousands):

Description	Borrowing Capacity		Maturity Date	Outstanding Balance at March 31, 2018
Unsecured Line of Credit - Partnership	$	1,200,000	January 30, 2022	$	75,000

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Related Party Transactions (Tables)

3 Months Ended

Mar. 31, 2018

Related Party Transactions [Abstract]

Schedule of Fees Earned from Related Parties

The following table summarizes the fees earned from these joint ventures, prior to the elimination of our ownership percentage (in thousands): 

	Three Months Ended
	March 31,
	2018		2017
Management fees	$	442	$	811
Leasing fees	302		434
Construction and development fees	697		624

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Net Income (Loss) Per Common Share (Tables)

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Reconciling the Components of Basic and Diluted Net Income (Loss) per Common Share

The following table reconciles the components of basic and diluted net income per common share or Common Unit (in thousands): 

	Three Months Ended March 31,
	2018			2017
General Partner
Net income attributable to common shareholders	$	72,963		$	70,200
Less: dividends on participating securities	(437		)	(542		)
Basic net income attributable to common shareholders	72,526			69,658
Add back dividends on dilutive participating securities	—			305
Noncontrolling interest in earnings of common unitholders	683			652
Diluted net income attributable to common shareholders	$	73,209		$	70,615
Weighted average number of common shares outstanding	356,740			355,282
Weighted average Limited Partner Units outstanding	3,355			3,316
Other potential dilutive shares	305			2,102
Weighted average number of common shares and potential dilutive securities	360,400			360,700
Partnership
Net income attributable to common unitholders	$	73,646		$	70,852
Less: distributions on participating securities	(437		)	(542		)
Basic net income attributable to common unitholders	$	73,209		$	70,310
Add back distributions on dilutive participating securities	—			305
Diluted net income attributable to common unitholders	$	73,209		$	70,615
Weighted average number of Common Units outstanding	360,095			358,598
Other potential dilutive units	305			2,102
Weighted average number of Common Units and potential dilutive securities	360,400			360,700

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 March 31,
	2018	2017
General Partner and Partnership
Other potential dilutive shares or units:
Anti-dilutive outstanding potential shares or units under fixed stock option and other stock-based compensation plans	—	—
Anti-dilutive outstanding participating securities	2,272	1,389

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Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

Reconciliation of Revenue from Segments to Consolidated

The following table shows the revenues for each of the reportable segments, as well as a reconciliation to consolidated revenues (in thousands): 

	Three Months Ended March 31,
	2018		2017
Revenues
Rental Operations:
Industrial	$	189,315	$	156,882
Non-reportable Rental Operations	3,453		14,416
Service Operations	41,101		9,399
Total segment revenues	233,869		180,697
Other revenue	688		378
Consolidated revenue from continuing operations	234,557		181,075
Discontinued operations	5		46,239
Consolidated revenue	$	234,562	$	227,314

Summary of Net Operation Income

The following table shows a reconciliation of our segment-level measures of profitability to consolidated income from continuing operations before income taxes (in thousands and excluding discontinued operations): 

	Three Months Ended March 31,
	2018			2017
PNOI
Industrial	$	133,388		$	114,680
Non-reportable Rental Operations	921			927
PNOI, excluding all sold properties	134,309			115,607
PNOI from sold properties included in continuing operations	1,606			2,905
PNOI, continuing operations	$	135,915		$	118,512
Earnings from Service Operations	692			1,775
Rental Operations revenues and expenses excluded from PNOI:
Straight-line rental income and expense, net	6,289			1,577
Revenues related to lease buyouts	23			9,785
Amortization of lease concessions and above and below market rents	545			(543		)
Intercompany rents and other adjusting items	14			180
Non-Segment Items:
Equity in earnings of unconsolidated joint ventures	8,287			4,749
Interest expense	(20,000		)	(24,162		)
Depreciation and amortization expense	(77,529		)	(62,023		)
Gain on sale of properties	44,886			37,046
Impairment charges	—			(859		)
Interest and other income, net	4,463			533
General and administrative expenses	(21,023		)	(19,232		)
Gain on land sales	2,949			1,505
Other operating expenses	(786		)	(738		)
Gain on extinguishment of debt	—			25
Other non-segment revenues and expenses, net	(872		)	(583		)
Income from continuing operations before income taxes	$	83,853		$	67,547

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Real Estate Assets, Discontinued Operations and Assets Held for Sale (Tables)

3 Months Ended

Mar. 31, 2018

Discontinued Operations and Disposal Groups [Abstract]

Schedule of Real Estate Properties [Table Text Block]

Real estate assets, excluding assets held for sale, consisted of the following (in thousands):

	March 31, 2018		December 31, 2017
Buildings and tenant improvements	$	4,668,740	$	4,642,832
Land and improvements	1,939,854		1,950,735
Real estate assets	$	6,608,594	$	6,593,567

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 in this report: 

	Held-for-Sale at March 31, 2018	Sold Year-to-Date in 2018	Sold in 2017	Total
Total properties included in discontinued operations	—	—	81	81
Properties excluded from discontinued operations	2	6	17	25
Total properties sold or classified as held-for-sale	2	6	98	106

Table Illustration of Discontinued Operations in Statement of Operations

The following table illustrates the operational results of the buildings reflected in discontinued operations (in thousands):  

	Three Months Ended March 31,
	2018			2017
Revenues	$	5		$	46,239
Operating expenses	(13		)	(14,996		)
Depreciation and amortization	—			(19,534		)
Operating (loss) income	(8		)	11,709
Interest expense	—			(6,343		)
(Loss) income before gain on sales	(8		)	5,366
Gain on sale of depreciable properties	132			—
Income from discontinued operations	$	124		$	5,366

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 noncontrolling interests (in thousands):

	Three Months Ended March 31,
	2018		2017
Income from continuing operations attributable to common shareholders	$	72,840	$	64,884
Income from discontinued operations attributable to common shareholders	123		5,316
Net income attributable to common shareholders	$	72,963	$	70,200

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

he following table illustrates aggregate balance sheet information for all properties and land held for sale (in thousands):

	Held-for-Sale Properties Included in Continuing Operations
	March 31, 2018			December 31, 2017
Land and improvements	$	9,055		$	8,157
Buildings and tenant improvements	15,283			10,505
Undeveloped land	706			—
Accumulated depreciation	(4,824		)	(2,553		)
Deferred leasing and other costs, net	862			862
Other assets	658			579
Total assets held for sale	$	21,740		$	17,550
Total liabilities related to assets held for sale	$	1,327		$	1,163

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Subsequent Events (Tables)

3 Months Ended

Mar. 31, 2018

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 April 25, 2018:

Class of stock/units	Quarterly Amount per Share or Unit	Record Date	Payment Date
Common - Quarterly	$0.20	May 16, 2018	May 31, 2018

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General Basis of Presentation (Details)	3 Months Ended
	Mar. 31, 2018
Common partnership interests of DRLP Owned	99.10%
Duke Realty Limited Partnership [Member]
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest	0.90%

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New Accounting Pronouncements Revenue Recognition (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Billings in Excess of Cost	$ 295,000	$ 276,000

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New Accounting Pronouncements Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and Cash Equivalents, at Carrying Value	$ 160,861	$ 67,562
Restricted cash held in escrow for like-kind exchange	59,196	116,405
Escrow Deposit	8,306	9,660
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 228,363	$ 193,627	$ 79,577	$ 57,038

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Variable Interest Entities (Balances Related to Joint Ventures) (Details) $ in Millions	Mar. 31, 2018 USD ($)
Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]
Maximum Guarantee Exposure for Joint Venture Loans	$ 102.9

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Acquisitions and Dispositions (Narrative) (Details)	3 Months Ended
	Mar. 31, 2018 buildings
Property, Plant and Equipment [Line Items]
Number of Real Estate Properties	2
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	7 years 4 months 24 days

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Acquisitions and Dispositions (Summary of Allocation of Fair Value of Amounts Recognized) (Details) $ in Thousands	Mar. 31, 2018 USD ($)
Property, Plant and Equipment [Line Items]
Real estate assets	$ 21,537
Lease related intangible assets	1,693
Total acquired assets	23,230
Below Market Lease, Gross	367
Fair value of acquired net assets	$ 22,863

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Acquisitions and Dispositions (Summary of Significant Assumptions Utilized in Estimates) (Details)	3 Months Ended
	Mar. 31, 2018 $ / sqft
Minimum [Member]
Property, Plant and Equipment [Line Items]
Exit capitalization rate	4.50%
Maximum [Member]
Property, Plant and Equipment [Line Items]
Exit capitalization rate	4.50%
Industrial [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Net rental rate per square foot	9.12
Industrial [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Net rental rate per square foot	10.20

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Acquisitions and Dispositions Dispositions (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Dispositions Disclosures [Line Items]
Proceeds from Sale of Real Estate Held-for-investment	$ 131,380	$ 103,120

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Indebtedness (Summary of Book Value and Changes in Fair Value of Debt) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Book value	$ 2,496,456	$ 2,422,891
Fair value	2,527,542	2,518,801
Issuances and Assumptions	75,000
Payments/Payoffs	(2,001)
Adjustments to fair value	(64,258)
Long-term Debt, Gross	2,516,985	2,444,005
Debt Issuance Costs, Net	20,529	21,114
Fixed Rate Secured Debt [Member]
Book value	308,099	309,463
Fair value	320,652	325,753
Issuances and Assumptions	0
Payments/Payoffs	(1,345)
Adjustments to fair value	(3,756)
Variable Rate Secured Debt [Member]
Book value	2,500	2,500
Fair value	2,500	2,500
Issuances and Assumptions	0
Payments/Payoffs	0
Adjustments to fair value	0
Unsecured Debt [Member]
Book value	2,131,386	2,132,042
Fair value	2,129,390	2,190,548
Issuances and Assumptions	0
Payments/Payoffs	(656)
Adjustments to fair value	(60,502)
Unsecured Line of Credit DRLP [Member]
Book value	75,000	0
Fair value	75,000	$ 0
Issuances and Assumptions	75,000
Payments/Payoffs	0
Adjustments to fair value	$ 0

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Indebtedness Secured Debt (Details)	3 Months Ended
	Mar. 31, 2018 USD ($) loans	Mar. 31, 2017 USD ($)
Debt Instrument [Line Items]
Repayments of Secured Debt	$ 1,345,000	$ 17,539,000
Fixed Rate Secured Debt [Member]
Debt Instrument [Line Items]
Repayments of Secured Debt	$ 215,000
number of secured loans repaid | loans	1
Debt Instrument, Interest Rate, Stated Percentage	5.55%
Minimum [Member] | Fixed Rate Secured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	3.90%
Maximum [Member] | Fixed Rate Secured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	4.00%

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Indebtedness Unsecured Debt (Details) - Unsecured Debt [Member]	3 Months Ended
	Mar. 31, 2018
Debt Instrument [Line Items]
Debt Instrument, Estimated Trading Values, Percent of Face Value, Minimum	95.00%
Debt Instrument, Estimated Trading Values, Percent of Face Value, Maximum	122.00%
Debt Instrument, Covenant Compliance	We were in compliance with all such financial covenants at

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Indebtedness (Unsecured Line of Credit) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Line of credit balance	$ 75,000	$ 0
London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Description of Variable Rate Basis	LIBOR
Unsecured Line of Credit DRLP [Member]
Line of Credit Facility, Covenant Compliance	we were in compliance with all financial covenants under this line of credit.
Maximum Capacity	$ 1,200,000
Maturity date	Jan. 30, 2022
Line of Credit Facility Option to Increase Borrowing Limit	$ 800,000
Line of credit balance	75,000
Line of Credit Facility, Maximum Borrowing Capacity	$ 2,000,000
Unsecured Line of Credit DRLP [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	0.875%
Line of Credit Facility, Interest Rate at Period End	2.75%

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Related Party Transactions (Schedule of Fees Earned from Related Parties) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Management Fees [Member]
Revenue from related party transactions	$ 442	$ 811
Leasing Fees [Member]
Revenue from related party transactions	302	434
Construction and Development Fees [Member]
Revenue from related party transactions	$ 697	$ 624

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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
	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income attributable to common shareholders	$ 72,963	$ 70,200
Less: dividends on participating securities	(437)	(542)
Basic net income attributable to common shareholders	72,526	69,658
Add back dividends on dilutive participating securities	0	305
Noncontrolling interest in earnings of common unitholders	683	652
Diluted net income attributable to common shareholders	$ 73,209	$ 70,615
Weighted average number of common shares/units outstanding, Basic	356,740	355,282
Weighted average Limited Partner Units outstanding	3,355	3,316
Other potential dilutive shares/units	305	2,102
Weighted average number of common shares/units and potential dilutive securities	360,400	360,700
Duke Realty Limited Partnership [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income attributable to common shareholders	$ 73,646	$ 70,852
Less: dividends on participating securities	(437)	(542)
Basic net income attributable to common unitholders	73,209	70,310
Add back dividends on dilutive participating securities	0	305
Diluted net income attributable to common unitholders	$ 73,209	$ 70,615
Weighted average number of common shares/units outstanding, Basic	360,095	358,598
Other potential dilutive shares/units	305	2,102
Weighted average number of common shares/units and potential dilutive securities	360,400	360,700

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Net Income (Loss) Per Common Share (Computation of Anti-Dilutive Common Shares) (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities	0	0
Participating Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities	2,272	1,389

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Segment Reporting Summary of Revenues (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)
Segment Reporting, Revenue Reconciling Item [Line Items]
Number of Reportable Segments	2
Rental and related revenue	$ 193,456	$ 171,676
General contractor and service fee revenue	41,101	9,399
Revenues	234,557	181,075
Disposal Group, Including Discontinued Operation, Revenue	5	46,239
Total Revenues Including Revenues Related To Discontinued Operations	234,562	227,314
Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	233,869	180,697
Operating Segments [Member] | Industrial [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Rental and related revenue	189,315	156,882
Operating Segments [Member] | All Other Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Rental and related revenue	3,453	14,416
Operating Segments [Member] | Service Operations [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
General contractor and service fee revenue	41,101	9,399
Corporate, Non-Segment [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Rental and related revenue	688	378
Disposal Group, Including Discontinued Operation, Revenue	$ 5	$ 46,239

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Segment Reporting (Summary of Net Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement [Line Items]
Straight-line rental income and expense, net	$ 6,288	$ 2,928
Equity in earnings of unconsolidated joint ventures	8,287	4,749
Interest expense	(20,000)	(24,162)
Depreciation and amortization expense	(77,529)	(62,023)
Gain on sale of properties	44,886	37,046
Impairment Charges	0	(859)
Interest and other income, net	4,463	533
General and administrative expenses	(21,023)	(19,232)
Gain on land sales	2,949	1,505
Other operating expenses	(786)	(738)
Gain on extinguishment of debt	0	25
Income from continuing operations before income taxes	83,853	67,547
Operating Segments [Member]
Statement [Line Items]
Property Level Net Operating Income – Cash Basis	134,309	115,607
Property Level Net Income, Cash Basis, Continuing Operations	135,915	118,512
Operating Segments [Member] | Industrial [Member]
Statement [Line Items]
Property Level Net Operating Income – Cash Basis	133,388	114,680
Operating Segments [Member] | All Other Segments [Member]
Statement [Line Items]
Property Level Net Operating Income – Cash Basis	921	927
Operating Segments [Member] | Service Operations [Member]
Statement [Line Items]
Earnings from Service Operations	692	1,775
Segment Reconciling Items [Member]
Statement [Line Items]
PNOI from sold properties included in continuing operations	1,606	2,905
Straight-line rental income and expense, net	6,289	1,577
Revenues Related to Lease Buyouts	23	9,785
Amortization of lease concessions and above and below market rents	545	(543)
Intercompany rents and other adjusting items	14	180
Corporate, Non-Segment [Member]
Statement [Line Items]
Equity in earnings of unconsolidated joint ventures	8,287	4,749
Interest expense	(20,000)	(24,162)
Depreciation and amortization expense	(77,529)	(62,023)
Gain on sale of properties	44,886	37,046
Impairment Charges	0	(859)
Interest and other income, net	4,463	533
General and administrative expenses	(21,023)	(19,232)
Gain on land sales	2,949	1,505
Other operating expenses	(786)	(738)
Gain on extinguishment of debt	0	25
Other non-segment revenues and expenses, net	$ (872)	$ (583)

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Real Estate Assets, Discontinued Operations and Assets Held for Sale Real Estate Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Real Estate Assets [Abstract]
Investment Building and Building Improvements	$ 4,668,740	$ 4,642,832
Land and Land Improvements	1,939,854	1,950,735
Real Estate Assets	$ 6,608,594	$ 6,593,567

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Real Estate Assets, Discontinued Operations and Assets Held for Sale (Table Illustration of Number of Properties in Discontinued Operations) (Details) - buildings	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Number of properties held for sale in discontinued operations	0
Number of properties sold in discontinued operations	0	81
Total number of properties in discontinued operations	81
Continuing Operations, Number of In-service Properties Held for Sale	2
Continuing Operations, Number of Real Estate Properties Sold	6	17
Continuing Operations, Number of Real Estate Properties Sold or Classified as Held for Sale	25
Number of Real Estate Properties Held for Sale	2
Number of Real Estate Properties Sold	6	98
Total Properties Sold or Classified as Held for Sale	106

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Real Estate Assets, Discontinued Operations and Assets Held for Sale (Table Illustration of Discontinued Operations in Income Statement) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Discontinued Operations
Payments For Second Generation Tenant Improvements Leasing Costs And Building Improvements	$ 14,102	$ 10,431
Revenues	5	46,239
Operating Expenses	(13)	(14,996)
Depreciation and amortization	0	(19,534)
Operating (loss) income	(8)	11,709
Interest expense	0	(6,343)
(Loss) income before gain on sales and income tax	(8)	5,366
Gain on sale of depreciable properties	132	0
Income from discontinued operations	$ 124	5,366
Discontinued Operations [Member]
Discontinued Operations
Payments For Second Generation Tenant Improvements Leasing Costs And Building Improvements		$ 12,600

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Real Estate Assets, Discontinued Operations and Assets Held for Sale (Allocation of Shareholders' Income (Loss) Between Continuing and Discontinued Operations) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Discontinued Operations
Income (loss) from continuing operations attributable to common shareholders	$ 72,840	$ 64,884
Income (loss) from discontinued operations attributable to common shareholders	123	5,316
Net income attributable to common shareholders	$ 72,963	$ 70,200

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Real Estate Assets, Discontinued Operations and Assets Held for Sale (Aggregate Balance Sheet of Properties Held for Sale Included in Discontinued Operations) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) a buildings	Dec. 31, 2017 USD ($)
Held for Sale Assets in Continuing and Discontinued Operations
Number of Real Estate Properties Held for Sale | buildings	2
Area of Land | a	10
Total assets held-for-sale	$ 21,740	$ 17,550
Total liabilities held-for-sale	1,327	1,163
Continuing Operations [Member]
Held for Sale Assets in Continuing and Discontinued Operations
Land and Land Improvements Held-for-Sale	9,055	8,157
Buildings and Tenant Improvements Held-for-Sale	15,283	10,505
Inventory, Land Held-for-sale	706	0
Accumulated Depreciation of Assets Held-for-Sale	(4,824)	(2,553)
Lease Related Assets, Held for Sale	862	862
Other assets	658	579
Total assets held-for-sale	21,740	17,550
Total liabilities held-for-sale	$ 1,327	$ 1,163

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Subsequent Events (Details) - Subsequent Event [Member] - Common Stock [Member]	3 Months Ended
	Jun. 30, 2018 $ / shares
Subsequent Event [Line Items]
Common stock dividends declared per share	$ 0.20
Record date	May 16, 2018
Dividends Payable, Date to be Paid	May 31, 2018