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 September 30, 2013

OR

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

For the transition period from              to     

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

DUKE REALTY CORPORATION

DUKE REALTY LIMITED PARTNERSHIP

(Exact Name of Registrant as Specified in Its Charter)

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

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

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

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

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

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

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

Duke Realty Corporation:

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

Duke Realty Limited Partnership:

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

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

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

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

Class	Outstanding Common Shares of Duke Realty Corporation at November 1, 2013
Common Stock, $.01 par value per share	325,790,455

EXPLANATORY NOTE

This report combines the quarterly reports on Form 10-Q for the period ended September 30, 2013 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 98.7% of the common partnership interests of the Partnership ("General Partner Units") as of September 30, 2013. The remaining 1.3% 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 also owns preferred partnership interests in the Partnership ("Preferred Units").

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 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 - September 30, 2013 (Unaudited) and December 31, 2012	3
		Consolidated Statements of Operations and Comprehensive Income (Unaudited) - Three and Nine Months Ended September 30, 2013 and 2012	4
		Consolidated Statements of Cash Flows (Unaudited) - Nine Months Ended September 30, 2013 and 2012	5
		Consolidated Statement of Changes in Equity (Unaudited) - Nine Months Ended September 30, 2013	6
	Duke Realty Limited Partnership:
		Consolidated Balance Sheets - September 30, 2013 (Unaudited) and December 31, 2012	7
		Consolidated Statements of Operations and Comprehensive Income (Unaudited) - Three and Nine Months Ended September 30, 2013 and 2012	8
		Consolidated Statements of Cash Flows (Unaudited) - Nine Months Ended September 30, 2013 and 2012	9
		Consolidated Statement of Changes in Equity (Unaudited) - Nine Months Ended September 30, 2013	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	22
Item 3.		Quantitative and Qualitative Disclosures About Market Risk	42
Item 4.		Controls and Procedures	42
Part II - Other Information
Item 1.		Legal Proceedings	43
Item 1A.		Risk Factors	43
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)

	September 30, 2013			December 31, 2012
	(Unaudited)
ASSETS
Real estate investments:
Land and improvements	$	1,443,643		$	1,284,081
Buildings and tenant improvements	5,720,356			5,398,886
Construction in progress	197,472			234,918
Investments in and advances to unconsolidated companies	328,660			372,256
Undeveloped land	580,052			614,208
	8,270,183			7,904,349
Accumulated depreciation	(1,384,219		)	(1,296,396		)
Net real estate investments	6,885,964			6,607,953
Real estate investments and other assets held-for-sale	57,790			30,937
Cash and cash equivalents	24,112			33,889
Accounts receivable, net of allowance of $3,818 and $3,374	20,073			22,283
Straight-line rent receivable, net of allowance of $7,472 and $6,091	124,574			120,303
Receivables on construction contracts, including retentions	28,650			39,754
Deferred financing costs, net of accumulated amortization of $52,370 and $48,218	38,029			40,083
Deferred leasing and other costs, net of accumulated amortization of $413,227 and $372,047	498,025			497,827
Escrow deposits and other assets	209,622			167,072
	$	7,886,839		$	7,560,101
LIABILITIES AND EQUITY
Indebtedness:
Secured debt	$	1,158,456		$	1,167,953
Unsecured debt	3,066,755			2,993,217
Unsecured line of credit	210,000			285,000
	4,435,211			4,446,170
Liabilities related to real estate investments held-for-sale	2,919			807
Construction payables and amounts due subcontractors, including retentions	78,376			84,679
Accrued real estate taxes	104,144			74,565
Accrued interest	36,439			59,215
Other accrued expenses	40,567			104,719
Other liabilities	130,537			121,097
Tenant security deposits and prepaid rents	45,702			42,731
Total liabilities	4,873,895			4,933,983
Shareholders' equity:
Preferred shares ($.01 par value); 5,000 shares authorized; 1,791 and 2,503 shares issued and outstanding	447,683			625,638
Common shares ($.01 par value); 400,000 shares authorized; 325,319 and 279,423 shares issued and outstanding	3,253			2,794
Additional paid-in capital	4,601,224			3,953,497
Accumulated other comprehensive income	3,780			2,691
Distributions in excess of net income	(2,076,299		)	(1,993,206		)
Total shareholders' equity	2,979,641			2,591,414
Noncontrolling interests	33,303			34,704
Total equity	3,012,944			2,626,118
	$	7,886,839		$	7,560,101

See accompanying Notes to Consolidated Financial Statements

3

DUKE REALTY CORPORATION AND SUBSIDIARIES

Consolidated Statements of Operations and Comprehensive Income

For the three and nine months ended September 30,

(in thousands, except per share amounts)

(Unaudited)

	Three Months Ended						Nine Months Ended
	2013			2012			2013			2012
Revenues:
Rental and related revenue	$	228,883		$	199,326		$	668,230		$	586,570
General contractor and service fee revenue	62,807			93,932			161,004			226,507
	291,690			293,258			829,234			813,077
Expenses:
Rental expenses	42,888			37,187			122,753			104,430
Real estate taxes	30,450			27,303			90,729			81,505
General contractor and other services expenses	59,392			87,719			142,925			209,519
Depreciation and amortization	103,594			90,202			296,791			264,435
	236,324			242,411			653,198			659,889
Other operating activities:
Equity in earnings (loss) of unconsolidated companies	(27		)	2,280			50,442			4,056
Gain on sale of properties	—			403			1,108			245
Gain on land sales	3,365			—			3,365			—
Undeveloped land carrying costs	(2,108		)	(2,140		)	(6,837		)	(6,606		)
Impairment charges	—			—			(3,777		)	—
Other operating expenses	(47		)	(130		)	(150		)	(591		)
General and administrative expenses	(10,373		)	(8,934		)	(33,225		)	(32,367		)
	(9,190		)	(8,521		)	10,926			(35,263		)
Operating income	46,176			42,326			186,962			117,925
Other income (expenses):
Interest and other income, net	145			150			1,219			394
Interest expense	(58,100		)	(58,812		)	(176,005		)	(175,726		)
Acquisition-related activity	(726		)	(954		)	(2,506		)	(2,563		)
Income (loss) from continuing operations before income taxes	(12,505		)	(17,290		)	9,670			(59,970		)
Income tax benefit	4,500			103			4,500			103
Income (loss) from continuing operations	(8,005		)	(17,187		)	14,170			(59,867		)
Discontinued operations:
Income (loss) before gain on sales	901			(1,970		)	70			(4,699		)
Gain on sale of depreciable properties	8,441			1,608			101,052			11,179
Income (loss) from discontinued operations	9,342			(362		)	101,122			6,480
Net income (loss)	1,337			(17,549		)	115,292			(53,387		)
Dividends on preferred shares	(7,356		)	(11,081		)	(24,261		)	(35,356		)
Adjustments for redemption of preferred shares	—			—			(5,932		)	(5,730		)
Net (income) loss attributable to noncontrolling interests	(48		)	400			(1,629		)	1,371
Net income (loss) attributable to common shareholders	$	(6,067	)	$	(28,230	)	$	83,470		$	(93,102	)
Basic net income (loss) per common share:
Continuing operations attributable to common shareholders	$	(0.05	)	$	(0.11	)	$	(0.06	)	$	(0.38	)
Discontinued operations attributable to common shareholders	0.03			—			0.31			0.02
Total	$	(0.02	)	$	(0.11	)	$	0.25		$	(0.36	)
Diluted net income (loss) per common share:
Continuing operations attributable to common shareholders	$	(0.05	)	$	(0.11	)	$	(0.06	)	$	(0.38	)
Discontinued operations attributable to common shareholders	0.03			—			0.31			0.02
Total	$	(0.02	)	$	(0.11	)	$	0.25		$	(0.36	)
Weighted average number of common shares outstanding	324,895			270,289			320,810			265,153
Weighted average number of common shares and potential dilutive securities	324,895			270,289			325,380			265,153
Comprehensive income (loss):
Net income (loss)	$	1,337		$	(17,549	)	$	115,292		$	(53,387	)
Other comprehensive income (loss):
Amortization of interest contracts	(116		)	457			567			1,371
Other	(54		)	(47		)	522			(181		)
Total other comprehensive income (loss)	(170		)	410			1,089			1,190
Comprehensive income (loss)	$	1,167		$	(17,139	)	$	116,381		$	(52,197	)

See accompanying Notes to Consolidated Financial Statements

4

DUKE REALTY CORPORATION AND SUBSIDIARIES

Consolidated Statements of Cash Flows

For the nine months endedSeptember 30,

(in thousands)

(Unaudited)

	2013			2012
Cash flows from operating activities:
Net income (loss)	$	115,292		$	(53,387	)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	214,118			193,479
Amortization of deferred leasing and other costs	89,359			86,859
Amortization of deferred financing costs	9,913			9,878
Straight-line rent adjustment	(12,421		)	(15,725		)
Impairment charges	3,777			—
Gain on acquisitions	(962		)	—
Gains on land and depreciated property sales	(105,525		)	(11,424		)
Third-party construction contracts, net	27,117			(4,295		)
Other accrued revenues and expenses, net	11,367			(14,621		)
Operating distributions received in excess of (less than) equity in earnings from unconsolidated companies	(34,411		)	10,772
Net cash provided by operating activities	317,624			201,536
Cash flows from investing activities:
Development of real estate investments	(320,698		)	(176,340		)
Acquisition of real estate investments and related intangible assets	(372,934		)	(321,099		)
Acquisition of undeveloped land	(30,101		)	(37,166		)
Second generation tenant improvements, leasing costs and building improvements	(60,052		)	(46,682		)
Other deferred leasing costs	(26,647		)	(22,727		)
Other assets	(14,725		)	674
Proceeds from land and depreciated property sales, net	330,740			112,559
Capital distributions from unconsolidated companies	106,306			4,890
Capital contributions and advances to unconsolidated companies	(38,959		)	(19,262		)
Net cash used for investing activities	(427,070		)	(505,153		)
Cash flows from financing activities:
Proceeds from issuance of common shares, net	632,531			236,301
Payments for redemption of preferred shares	(177,955		)	(168,272		)
Proceeds from unsecured debt	500,000			600,000
Payments on unsecured debt	(426,462		)	(172,374		)
Proceeds from secured debt financings	1,933			13,305
Payments on secured indebtedness including principal amortization	(112,097		)	(107,240		)
Payments on lines of credit, net	(75,000		)	(20,293		)
Distributions to common shareholders	(164,811		)	(135,083		)
Distributions to preferred shareholders	(24,261		)	(31,630		)
Contributions from (distributions to) noncontrolling interests	(2,692		)	2,788
Buyout of noncontrolling interests	—			(6,208		)
Change in book overdrafts	(44,225		)	—
Deferred financing costs	(7,292		)	(8,334		)
Net cash provided by financing activities	99,669			202,960
Net decrease in cash and cash equivalents	(9,777		)	(100,657		)
Cash and cash equivalents at beginning of period	33,889			213,809
Cash and cash equivalents at end of period	$	24,112		$	113,152
Non-cash investing and financing activities:
Assumption of indebtedness and other liabilities in real estate acquisitions	$	106,555		$	19,992
Carrying amount of pre-existing ownership interest in acquired property	$	630		$	—
Conversion of Limited Partner Units to common shares	$	338		$	29,002
Preferred distributions declared but not paid	$	—		$	3,726

See accompanying Notes to Consolidated Financial Statements

5

DUKE REALTY CORPORATION AND SUBSIDIARIES

Consolidated Statement of Changes in Equity

For the nine months endedSeptember 30, 2013

(in thousands, except per share data)

(Unaudited)

	Common Shareholders
	Preferred Stock			Common Stock		Additional Paid-in Capital		Accumulated Other Comprehensive Income		Distributions in Excess of Net Income			Non- Controlling Interests			Total
Balance at December 31, 2012	$	625,638		$	2,794	$	3,953,497	$	2,691	$	(1,993,206	)	$	34,704		$	2,626,118
Net income	—			—		—		—		113,663			1,629			115,292
Other comprehensive income	—			—		—		1,089		—			—			1,089
Issuance of common shares	—			451		632,080		—		—			—			632,531
Stock-based compensation plan activity	—			7		9,378		—		(1,752		)	—			7,633
Conversion of Limited Partner Units	—			1		337		—		—			(338		)	—
Distributions to preferred shareholders	—			—		—		—		(24,261		)	—			(24,261		)
Redemption of preferred shares	(177,955		)	—		5,932		—		(5,932		)	—			(177,955		)
Distributions to common shareholders ($0.51 per share)	—			—		—		—		(164,811		)	—			(164,811		)
Distributions to noncontrolling interests	—			—		—		—		—			(2,692		)	(2,692		)
Balance at September 30, 2013	$	447,683		$	3,253	$	4,601,224	$	3,780	$	(2,076,299	)	$	33,303		$	3,012,944

See accompanying Notes to Consolidated Financial Statements

6

DUKE REALTY LIMITED PARTNERSHIP AND SUBSIDIARIES

Consolidated Balance Sheets

(in thousands)

	September 30, 2013			December 31, 2012
	(Unaudited)
ASSETS
Real estate investments:
Land and improvements	$	1,443,643		$	1,284,081
Buildings and tenant improvements	5,720,356			5,398,886
Construction in progress	197,472			234,918
Investments in and advances to unconsolidated companies	328,660			372,256
Undeveloped land	580,052			614,208
	8,270,183			7,904,349
Accumulated depreciation	(1,384,219		)	(1,296,396		)
Net real estate investments	6,885,964			6,607,953
Real estate investments and other assets held-for-sale	57,790			30,937
Cash and cash equivalents	24,112			33,889
Accounts receivable, net of allowance of $3,818 and $3,374	20,073			22,283
Straight-line rent receivable, net of allowance of $7,472 and $6,091	124,574			120,303
Receivables on construction contracts, including retentions	28,650			39,754
Deferred financing costs, net of accumulated amortization of $52,370 and $48,218	38,029			40,083
Deferred leasing and other costs, net of accumulated amortization of $413,227 and $372,047	498,025			497,827
Escrow deposits and other assets	209,622			167,072
	$	7,886,839		$	7,560,101
LIABILITIES AND EQUITY
Indebtedness:
Secured debt	$	1,158,456		$	1,167,953
Unsecured debt	3,066,755			2,993,217
Unsecured line of credit	210,000			285,000
	4,435,211			4,446,170
Liabilities related to real estate investments held-for-sale	2,919			807
Construction payables and amounts due subcontractors, including retentions	78,376			84,679
Accrued real estate taxes	104,144			74,565
Accrued interest	36,439			59,215
Other accrued expenses	40,772			104,886
Other liabilities	130,537			121,097
Tenant security deposits and prepaid rents	45,702			42,731
Total liabilities	4,874,100			4,934,150
Partners' equity:
General Partner:
Common equity (325,319 and 279,423 General Partner Units issued and outstanding)	2,532,146			1,967,091
Preferred equity (1,791 and 2,503 Preferred Units issued and outstanding)	447,683			625,638
	2,979,829			2,592,729
Limited Partners' common equity (4,388 and 4,419 Limited Partner Units issued and outstanding)	19,944			21,383
Accumulated other comprehensive income	3,780			2,691
Total partners' equity	3,003,553			2,616,803
Noncontrolling interests	9,186			9,148
Total equity	3,012,739			2,625,951
	$	7,886,839		$	7,560,101

See accompanying Notes to Consolidated Financial Statements

7

DUKE REALTY LIMITED PARTNERSHIP AND SUBSIDIARIES

Consolidated Statements of Operations and Comprehensive Income

For the three and nine months ended September 30,

(in thousands, except per unit amounts)

(Unaudited)

	Three Months Ended						Nine Months Ended
	2013			2012			2013			2012
Revenues:
Rental and related revenue	$	228,883		$	199,326		$	668,230		$	586,570
General contractor and service fee revenue	62,807			93,932			161,004			226,507
	291,690			293,258			829,234			813,077
Expenses:
Rental expenses	42,888			37,187			122,753			104,430
Real estate taxes	30,450			27,303			90,729			81,505
General contractor and other services expenses	59,392			87,719			142,925			209,519
Depreciation and amortization	103,594			90,202			296,791			264,435
	236,324			242,411			653,198			659,889
Other operating activities:
Equity in earnings (loss) of unconsolidated companies	(27		)	2,280			50,442			4,056
Gain on sale of properties	—			403			1,108			245
Gain on land sales	3,365			—			3,365			—
Undeveloped land carrying costs	(2,108		)	(2,140		)	(6,837		)	(6,606		)
Impairment charges	—			—			(3,777		)	—
Other operating expenses	(47		)	(130		)	(150		)	(591		)
General and administrative expenses	(10,373		)	(8,934		)	(33,225		)	(32,367		)
	(9,190		)	(8,521		)	10,926			(35,263		)
Operating income	46,176			42,326			186,962			117,925
Other income (expenses):
Interest and other income, net	145			150			1,219			394
Interest expense	(58,100		)	(58,812		)	(176,005		)	(175,726		)
Acquisition-related activity	(726		)	(954		)	(2,506		)	(2,563		)
Income (loss) from continuing operations before income taxes	(12,505		)	(17,290		)	9,670			(59,970		)
Income tax benefit	4,500			103			4,500			103
Income (loss) from continuing operations	(8,005		)	(17,187		)	14,170			(59,867		)
Discontinued operations:
Income (loss) before gain on sales	901			(1,970		)	70			(4,699		)
Gain on sale of depreciable properties	8,441			1,608			101,052			11,179
Income (loss) from discontinued operations	9,342			(362		)	101,122			6,480
Net income (loss)	1,337			(17,549		)	115,292			(53,387		)
Distributions on Preferred Units	(7,356		)	(11,081		)	(24,261		)	(35,356		)
Adjustments for redemption of Preferred Units	—			—			(5,932		)	(5,730		)
Net income attributable to noncontrolling interests	(140		)	(59		)	(487		)	(365		)
Net income (loss) attributable to common unitholders	$	(6,159	)	$	(28,689	)	$	84,612		$	(94,838	)
Basic net income (loss) per Common Unit:
Continuing operations attributable to common unitholders	$	(0.05	)	$	(0.11	)	$	(0.06	)	$	(0.38	)
Discontinued operations attributable to common unitholders	0.03			—			0.31			0.02
Total	$	(0.02	)	$	(0.11	)	$	0.25		$	(0.36	)
Diluted net income (loss) per Common Unit:
Continuing operations attributable to common unitholders	$	(0.05	)	$	(0.11	)	$	(0.06	)	$	(0.38	)
Discontinued operations attributable to common unitholders	0.03			—			0.31			0.02
Total	$	(0.02	)	$	(0.11	)	$	0.25		$	(0.36	)
Weighted average number of Common Units outstanding	329,283			274,800			325,203			270,095
Weighted average number of Common Units and potential dilutive securities	329,283			274,800			325,380			270,095
Comprehensive income (loss):
Net income (loss)	$	1,337		$	(17,549	)	$	115,292		$	(53,387	)
Other comprehensive income (loss):
Amortization of interest contracts	(116		)	457			567			1,371
Other	(54		)	(47		)	522			(181		)
Total other comprehensive income (loss)	(170		)	410			1,089			1,190
Comprehensive income (loss)	$	1,167		$	(17,139	)	$	116,381		$	(52,197	)

See accompanying Notes to Consolidated Financial Statements

8

DUKE REALTY LIMITED PARTNERSHIP AND SUBSIDIARIES

Consolidated Statements of Cash Flows

For the nine months endedSeptember 30,

(in thousands)

(Unaudited)

	2013			2012
Cash flows from operating activities:
Net income (loss)	$	115,292		$	(53,387	)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	214,118			193,479
Amortization of deferred leasing and other costs	89,359			86,859
Amortization of deferred financing costs	9,913			9,878
Straight-line rent adjustment	(12,421		)	(15,725		)
Impairment charges	3,777			—
Gain on acquisitions	(962		)	—
Gains on land and depreciated property sales	(105,525		)	(11,424		)
Third-party construction contracts, net	27,117			(4,295		)
Other accrued revenues and expenses, net	11,405			(14,582		)
Operating distributions received in excess of (less than) equity in earnings from unconsolidated companies	(34,411		)	10,772
Net cash provided by operating activities	317,662			201,575
Cash flows from investing activities:
Development of real estate investments	(320,698		)	(176,340		)
Acquisition of real estate investments and related intangible assets	(372,934		)	(321,099		)
Acquisition of undeveloped land	(30,101		)	(37,166		)
Second generation tenant improvements, leasing costs and building improvements	(60,052		)	(46,682		)
Other deferred leasing costs	(26,647		)	(22,727		)
Other assets	(14,725		)	674
Proceeds from land and depreciated property sales, net	330,740			112,559
Capital distributions from unconsolidated companies	106,306			4,890
Capital contributions and advances to unconsolidated companies	(38,959		)	(19,262		)
Net cash used for investing activities	(427,070		)	(505,153		)
Cash flows from financing activities:
Contributions from the General Partner	632,531			236,301
Payments for redemption of Preferred Units	(177,955		)	(168,272		)
Proceeds from unsecured debt	500,000			600,000
Payments on unsecured debt	(426,462		)	(172,374		)
Proceeds from secured debt financings	1,933			13,305
Payments on secured indebtedness including principal amortization	(112,097		)	(107,240		)
Payments on lines of credit, net	(75,000		)	(20,293		)
Distributions to common unitholders	(167,092		)	(137,662		)
Distributions to preferred unitholders	(24,261		)	(31,630		)
Contributions from (distributions to) noncontrolling interests	(449		)	5,311
Buyout of noncontrolling interests	—			(6,208		)
Change in book overdrafts	(44,225		)	—
Deferred financing costs	(7,292		)	(8,334		)
Net cash provided by financing activities	99,631			202,904
Net decrease in cash and cash equivalents	(9,777		)	(100,674		)
Cash and cash equivalents at beginning of period	33,889			213,826
Cash and cash equivalents at end of period	$	24,112		$	113,152
Non-cash investing and financing activities:
Assumption of indebtedness and other liabilities in real estate acquisitions	$	106,555		$	19,992
Carrying amount of pre-existing ownership interest in acquired property	$	630		$	—
Conversion of Limited Partner Units to common shares of the General Partner	$	338		$	29,002
Preferred distributions declared but not paid	$	—		$	3,726

See accompanying Notes to Consolidated Financial Statements

9

DUKE REALTY LIMITED PARTNERSHIP AND SUBSIDIARIES

Consolidated Statement of Changes in Equity

For the nine months endedSeptember 30, 2013

(in thousands, except per unit data)

(Unaudited)

	Common Unitholders
							Limited			Accumulated
	General Partner						Partners'			Other		Total
	Common Equity			Preferred Equity			Common Equity			Comprehensive Income		Partners' Equity			Noncontrolling Interests			Total Equity
Balance at December 31, 2012	$	1,967,091		$	625,638		$	21,383		$	2,691	$	2,616,803		$	9,148		$	2,625,951
Net income	89,402			24,261			1,142			—		114,805			487			115,292
Other comprehensive income	—			—			—			1,089		1,089			—			1,089
Capital contribution from the General Partner	632,531			—			—			—		632,531			—			632,531
Stock-based compensation plan activity	7,633			—			—			—		7,633			—			7,633
Conversion of Limited Partner Units to common shares of the General Partner	338			—			(338		)	—		—			—			—
Distributions to Preferred Unitholders	—			(24,261		)	—			—		(24,261		)	—			(24,261		)
Redemption of Preferred Units	—			(177,955		)	—			—		(177,955		)	—			(177,955		)
Distributions to Partners ($0.51 per Common Unit)	(164,849		)	—			(2,243		)	—		(167,092		)	—			(167,092		)
Distributions to noncontrolling interests	—			—			—			—		—			(449		)	(449		)
Balance at September 30, 2013	$	2,532,146		$	447,683		$	19,944		$	3,780	$	3,003,553		$	9,186		$	3,012,739

See accompanying Notes to Consolidated Financial Statements

10

DUKE REALTY CORPORATION AND DUKE REALTY LIMITED PARTNERSHIP

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1.    General Basis of Presentation

The interim consolidated financial statements included herein have been prepared by Duke Realty Corporation (the "General Partner") and Duke Realty Limited Partnership (the "Partnership"). In this Report, unless the context indicates otherwise, the terms "Company," "we," "us" and "our" refer to the General Partner and the Partnership, collectively, and those entities owned or controlled by the General Partner and/or the Partnership. The 2012 year-end consolidated balance sheet data included in this Quarterly Report on Form 10-Q (this "Report") was derived from the audited financial statements in the combined Annual Report on Form 10-K of the General Partner and the Partnership for the year ended December 31, 2012, but does not include all disclosures required by accounting principles generally accepted in the United States of America ("GAAP"). The financial statements have been prepared in accordance with GAAP for interim financial information and in accordance with Rule 10-01 of Regulation S-X of the Securities Exchange Act of 1934, as amended. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation have been included. GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and revenue and expenses during the reporting period. Our actual results could differ from those estimates and assumptions. These financial statements should be read in conjunction with Management's Discussion and Analysis of Financial Condition and Results of Operations included herein and the consolidated financial statements and notes thereto included in the combined Annual Report on Form 10-K of the General Partner and the Partnership for the year ended December 31, 2012.

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

The General Partner is the sole general partner of the Partnership, owning approximately 98.7% of the common partnership interests of the Partnership ("General Partner Units") at September 30, 2013. The remaining 1.3% of the common partnership interests ("Limited Partner Units" and, together with the General Partner Units, the "Common Units") are owned by limited partners. As the sole general partner of the Partnership, the General Partner has full, exclusive and complete responsibility and discretion in the day-to-day management and control of the Partnership. The General Partner and the Partnership are operated as one enterprise. The management of the General Partner consists of the same members as the management of the Partnership. As the sole general partner with control of the Partnership, the General Partner consolidates the Partnership for financial reporting purposes, and the General Partner does not have any significant assets other than its investment in the Partnership. Therefore, the assets and liabilities of the General Partner and the Partnership are substantially the same.

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

11

We own and operate a portfolio primarily consisting of industrial and office properties and provide real estate services to third-party owners. Substantially all of our Rental Operations (see Note 10) are conducted through the Partnership. We conduct our Service Operations (see Note 10) through Duke Realty Services, LLC, Duke Realty Services Limited Partnership and Duke Construction Limited Partnership ("DCLP"), which are consolidated entities that are 100% owned by a combination of the General Partner and the Partnership. DCLP is owned through a taxable REIT subsidiary. The consolidated financial statements include our accounts and the accounts of our majority-owned or controlled subsidiaries.

2.    Reclassifications

Certain amounts in the accompanying consolidated financial statements for 2012 have been reclassified to conform to the 2013 consolidated financial statement presentation.

3.    Other Comprehensive Income

In February 2013, the Financial Accounting Standards Board issued Accounting Standards Update No. 2013-02, Other Comprehensive Income (Topic 220): Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income ("ASU 2013-02"), which was effective for us beginning with the three months ended March 31, 2013. ASU 2013-02 requires presentation of significant amounts reclassified out of accumulated other comprehensive income. Activity within other comprehensive income or loss includes the amortization to interest expense, over the lives of previously hedged loans, of the values of interest rate swaps that have been settled, as well as changes in the fair values of currently outstanding interest rate swaps that we have designated as cash flow hedges. Activity within other comprehensive income is not material for any individual type of activity, as well as for all activities in the aggregate, for all periods presented in this Report.

4.    Variable Interest Entities

At September 30, 2013, there were three unconsolidated joint ventures that met the criteria to be considered variable interest entities ("VIEs"). These three unconsolidated joint ventures were formed with the sole purpose of developing, constructing, leasing, marketing and selling or operating properties. The business activities of these unconsolidated joint ventures have been financed through a combination of equity contributions, partner/member loans, and third-party debt that is guaranteed by a combination of us and the other partner/member of each entity. All significant decisions for these unconsolidated joint ventures, including those decisions that most significantly impact each venture's economic performance, require unanimous approval of each joint venture's partners or members. In certain cases, these decisions also require lender approval. Unanimous approval requirements for these unconsolidated joint ventures include entering into new leases, setting annual operating budgets, selling underlying properties, and incurring additional indebtedness. Because no single entity exercises control over the decisions that most significantly affect each joint venture's economic performance, we determined there to be no individual primary beneficiary and that the equity method of accounting is appropriate.

The following is a summary of the carrying value in our consolidated balance sheet, as well as our maximum loss exposure under guarantees for the three unconsolidated subsidiaries that we have determined to be VIEs at September 30, 2013 (in millions):

	Carrying Value			Maximum Loss Exposure
Investment in unconsolidated companies	$	44.6		$	44.6
Guarantee obligations (1)	$	(20.3	)	$	(141.9	)

(1) We are party to guarantees of the third-party debt of these joint ventures, and our maximum loss exposure is equal to the maximum monetary obligation pursuant to the guarantee agreements. We have also recorded a liability for our probable future obligation under a guarantee to the lender of one of these ventures, which is included within the carrying value of our guarantee obligations. Pursuant to an agreement with the lender, we may make partner loans to this joint venture that will reduce our maximum guarantee obligation on a dollar-for-dollar basis. The carrying value of our recorded guarantee obligations is included in other liabilities in our Consolidated Balance Sheets.

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5.    Acquisitions and Dispositions

2013 Acquisitions

We acquired 15 operating properties during the nine months ended September 30, 2013. These acquisitions consisted of three industrial properties in Central and Southern New Jersey, three industrial properties in Southern California, two industrial properties in Central California, one industrial property in Houston, Texas, one industrial property near Kansas City, Missouri, one industrial property near St. Louis, Missouri, two industrial properties in Northeast and Central Pennsylvania, one industrial property near Indianapolis, Indiana and one medical office property in Central Florida. The following table summarizes the fair value of amounts recognized for each major class of asset and liability (in thousands) for these acquisitions:

Real estate assets	$	422,538
Lease related intangible assets	58,826
Total acquired assets	481,364
Secured debt	103,638
Below market lease liability	1,469
Other liabilities	1,448
Total assumed liabilities	106,555
Fair value of acquired net assets	$	374,809

The leases in the acquired properties had a weighted average remaining life at acquisition of approximately 7.6 years.

Fair Value Measurements

The fair value estimates used in allocating the aggregate purchase price of each acquisition among the individual components of real estate assets and liabilities were determined primarily through calculating the "as-if vacant" value of each building, using the income approach, and relied significantly upon internally determined assumptions. We have determined these estimates to have been primarily based upon Level 3 inputs, which are unobservable inputs based on our own assumptions. The range of most significant assumptions utilized in making the lease-up and future disposition estimates used in calculating the "as-if vacant" value of each building acquired during the nine months ended September 30, 2013 were as follows:

	Low		High
Discount rate	6.60	%	9.67	%
Exit capitalization rate	5.10	%	7.67	%
Lease-up period (months)	12		24
Net rental rate per square foot – Industrial	$2.95		$8.28
Net rental rate per square foot – Medical Office	$18.00		$18.00

Acquisition-Related Activity

The acquisition-related activity in our Consolidated Statements of Operations and Comprehensive Income for the nine months ended September 30, 2013 and 2012 consisted of transaction costs related to completed acquisitions, which are expensed as incurred, as well as gains or losses related to acquisitions where we had a pre-existing non-controlling ownership interest. We recognized a gain of $962,000 on the pre-existing ownership interest that we held in one of the industrial properties we acquired and expenses of $3.5 million for transaction costs during the nine months ended September 30, 2013.

Activity during the nine months endedSeptember 30, 2012 consisted of transaction costs related to acquisitions, which were expensed as incurred.

13

Dispositions

We disposed of certain consolidated income-producing real estate assets and undeveloped land and received net cash proceeds of $330.7 million and $112.6 million during the nine months ended September 30, 2013 and 2012, respectively.

During the nine months endedSeptember 30, 2013, 17 office properties and one industrial property were sold from certain of our unconsolidated joint ventures for which our capital distributions totaled $89.5 million. Our share of gains from joint venture property sales, which are included in equity in earnings, related almost entirely to these sales and totaled $49.0 million.

6.    Indebtedness

All debt is held directly or indirectly by the Partnership. The General Partner does not have any indebtedness, but does guarantee all of the unsecured debt of the Partnership.

The following table summarizes the book value and changes in the fair value of our debt for the nine months ended September 30, 2013 (in thousands):

	Book Value at 12/31/12		Book Value at 9/30/13		Fair Value at 12/31/12		Issuances and Assumptions		Payments/Payoffs			Adjustments to Fair Value			Fair Value at 9/30/13
Fixed rate secured debt	$	1,149,541	$	1,139,262	$	1,251,477	$	103,638	$	(110,946	)	$	(23,801	)	$	1,220,368
Variable rate secured debt	18,412		19,194		18,386		1,933		(1,151		)	27			19,195
Unsecured debt	2,993,217		3,066,755		3,336,386		500,000		(426,462		)	(135,936		)	3,273,988
Unsecured line of credit	285,000		210,000		285,632		—		(75,000		)	403			211,035
Total	$	4,446,170	$	4,435,211	$	4,891,881	$	605,571	$	(613,559	)	$	(159,307	)	$	4,724,586

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 3.50% to 4.90%, depending on the attributes of the specific loans. The current market rates we utilized were internally estimated; therefore, we have concluded that our determination of fair value for our fixed rate secured debt was primarily based upon Level 3 inputs.

During the nine months endedSeptember 30, 2013, we repaid nine secured loans, at their maturity dates, totaling $100.1 million. These loans had a weighted average stated interest rate of 5.66%.

During the nine months endedSeptember 30, 2013, we assumed three secured loans, in conjunction with our acquisition activity, with a total face value of $99.3 million and a fair value of $103.6 million. These assumed loans had a weighted average remaining term at acquisition of 1.8 years and carry a weighted average stated interest rate of 5.59%. We used an estimated market interest rate of 3.00% in determining the fair value of these loans. Between the date of acquisition and the end of the most recent reporting period, interest rates increased, resulting in our estimated market interest rate for these loans increasing to 3.50%.

Unsecured Debt

At September 30, 2013, with the exception of the $250.0 million variable rate term note described below, 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

14

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 93.00% to 124.00% of face value.

In March 2013, we issued $250.0 million of unsecured notes that bear interest at 3.625%, have an effective rate of 3.72%, and mature on April 15, 2023.

In May 2013, we issued and fully drew down on a term loan with an aggregate commitment of $250.0 million that bears interest at a variable rate of LIBOR plus 1.35% (equal to 1.54% for outstanding borrowings at September 30, 2013) and matures May 14, 2018.

During the nine months endedSeptember 30, 2013, we repaid two unsecured notes at their maturity dates totaling $425.0 million. These notes had a weighted average effective rate of 6.40% and a weighted average stated rate of 5.68%.

The indentures (and related supplemental indentures) governing our outstanding series of notes also require us to comply with financial ratios and other covenants regarding our operations. We were in compliance with all such covenants at September 30, 2013.

Unsecured Line of Credit

Our unsecured line of credit at September 30, 2013 is described as follows (in thousands):

Description	Maximum Capacity		Maturity Date	Outstanding Balance at September 30, 2013
Unsecured Line of Credit - Partnership	$	850,000	December 2015	$	210,000

The Partnership's unsecured line of credit has an interest rate on borrowings of LIBOR plus 1.25% (equal to 1.43% for outstanding borrowings at September 30, 2013) and a maturity date of December 2015. Subject to certain conditions, the terms also include an option to increase the facility by up to an additional $400.0 million, for a total of up to $1.25 billion.

This line of credit provides us with an option to obtain borrowings from financial institutions that participate in the line at rates that may be lower than the stated interest rate, subject to certain restrictions.

This line of credit contains financial covenants that require us to meet certain financial ratios and defined levels of performance, including those related to fixed charge coverage, unsecured interest expense coverage and debt-to-asset value (with asset value being defined in the Partnership's unsecured line of credit agreement). At September 30, 2013, we were in compliance with all covenants under this line of credit.

To the extent that there are outstanding borrowings, we utilize a discounted cash flow methodology in order to estimate the fair value of our unsecured line of credit. The net present value of the difference between future contractual interest payments and future interest payments based on our estimate of a current market rate represents the difference between the book value and the fair value. Our estimate of a current market rate is based upon the rate, considering current market conditions and our specific credit profile, at which we estimate we could obtain similar borrowings. The current market rate of 1.48% that we utilized was internally estimated; therefore, we have concluded that our determination of fair value for our unsecured line of credit was primarily based upon a Level 3 input.

15

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

General Partner

In January 2013, the General Partner completed a public offering of 41.4 million common shares at an issue price of $14.25 per share, resulting in gross proceeds of $590.0 million and, after deducting underwriting fees and estimated offering costs, net proceeds of approximately $571.9 million. A portion of the net proceeds from this offering were used to repay all of the outstanding borrowings under the Partnership's existing revolving credit facility, which had an outstanding balance of $285.0 million at December 31, 2012, and the remaining proceeds were used to redeem all of the General Partner's outstanding 8.375% Series O Cumulative Redeemable Preferred Shares ("Series O Shares") and for general corporate purposes.

In February 2013, the General Partner redeemed all of the outstanding shares of its Series O Shares at their liquidation amount of $178.0 million. Original offering costs of $5.9 million were included as a reduction to net income attributable to common shareholders in conjunction with the redemption of these shares.

In the first nine months of 2013, the General Partner issued 3.7 million common shares pursuant to its at the market equity program, generating gross proceeds of approximately $61.9 million and, after deducting commissions and other costs, net proceeds of approximately $60.7 million. The General Partner paid approximately $897,000 in commissions related to the sale of these common shares. The proceeds from these offerings were used for general corporate purposes, which include the funding of development costs.

Partnership

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

8.    Related Party Transactions

We provide property management, asset management, leasing, construction and other tenant-related services to unconsolidated companies in which we have equity interests. We recorded the corresponding fees based on contractual terms that approximate market rates for these types of services and have eliminated our ownership percentage of these fees in the consolidated financial statements. The following table summarizes the fees earned from these companies, prior to elimination, for the three and nine months ended September 30,2013 and 2012, respectively (in thousands): 

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2013		2012		2013		2012
Management fees	$	2,246	$	2,796	$	6,872	$	8,251
Leasing fees	310		622		1,432		2,856
Construction and development fees	681		1,860		3,258		3,615

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

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

Diluted net income (loss) per common share is computed by dividing the sum of basic net income (loss) attributable to common shareholders and the noncontrolling interest in earnings allocable to Limited Partner Units (to the extent the Limited Partner Units are dilutive) by the sum of the weighted average number of common shares outstanding

16

and, to the extent they are dilutive, Units outstanding and any potential dilutive securities for the period. Diluted net income (loss) per Common Unit is computed by dividing the basic net income (loss) attributable to common unitholders by the sum of the weighted average number of Common Units outstanding and any potential dilutive securities for the period.

The following table reconciles the components of basic and diluted net income (loss) per common share or Common Unit for the three and nine months ended September 30,2013 and 2012, respectively (in thousands): 

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
General Partner
Net income (loss) attributable to common shareholders	$	(6,067	)	$	(28,230	)	$	83,470		$	(93,102	)
Less: Dividends on participating securities	(650		)	(680		)	(2,024		)	(2,388		)
Basic net income (loss) attributable to common shareholders	(6,717		)	(28,910		)	81,446			(95,490		)
Noncontrolling interest in earnings of common unitholders	—			—			1,142			—
Diluted net income (loss) attributable to common shareholders	$	(6,717	)	$	(28,910	)	$	82,588		$	(95,490	)
Weighted average number of common shares outstanding	324,895			270,289			320,810			265,153
Weighted average Limited Partner Units outstanding	—			—			4,393			—
Other potential dilutive shares	—			—			177			—
Weighted average number of common shares and potential dilutive securities	324,895			270,289			325,380			265,153
Partnership
Net income (loss) attributable to common unitholders	$	(6,159	)	$	(28,689	)	$	84,612		$	(94,838	)
Less: Distributions on participating securities	(650		)	(680		)	(2,024		)	(2,388		)
Basic and diluted net income (loss) attributable to common unitholders	$	(6,809	)	$	(29,369	)	$	82,588		$	(97,226	)
Weighted average number of Common Units outstanding	329,283			274,800			325,203			270,095
Other potential dilutive units	—			—			177			—
Weighted average number of Common Units and potential dilutive securities	329,283			274,800			325,380			270,095

The Limited Partner Units are anti-dilutive to the General Partner for the three months endedSeptember 30,2013 and the three and nine months ended September 30,2012 as a result of the net loss for those periods. In addition, substantially all potential shares related to our stock-based compensation plans are anti-dilutive for all periods presented. The following table summarizes the data that is excluded from the computation of net income (loss) per common share or Common Unit as a result of being anti-dilutive (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013		2012
General Partner
Noncontrolling interest in loss of common unitholders	$	(92	)	$	(459	)	$	—	$	(1,736	)
Weighted average Limited Partner Units outstanding	4,388			4,511			—		4,942
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	1,373			1,763			1,373		1,763
Outstanding participating securities	3,866			4,045			3,866		4,045

10.    Segment Reporting

We have four reportable operating segments at September 30, 2013, the first three of which consist of the ownership and rental of (i) industrial, (ii) office and (iii) medical office real estate investments. The operations of our industrial, office and medical office properties, along with our retail properties, are collectively referred to as "Rental Operations." Our retail properties, as well as any other properties not included in our reportable segments, do not by themselves meet the quantitative thresholds for separate presentation as a reportable segment. The fourth reportable segment consists of various real estate services such as property management, asset management,

17

maintenance, leasing, development, general contracting and construction management to third-party property owners and joint ventures, and is collectively referred to as "Service Operations." Our reportable segments offer different products or services and are managed separately because each segment requires different operating strategies and management expertise.

We assess and measure the overall operating results of the General Partner and the Partnership based upon Funds From Operations ("FFO"), which is an industry performance measure that management believes is a useful indicator of consolidated operating performance. FFO is used by industry analysts and investors as a supplemental operating performance measure of a REIT. The National Association of Real Estate Investment Trusts ("NAREIT") created FFO as a non-GAAP supplemental measure of REIT operating performance. FFO, as defined by NAREIT, represents GAAP net income (loss), excluding extraordinary items as defined under GAAP, gains or losses from sales of previously depreciated real estate assets, impairment charges related to depreciable real estate assets, plus certain non-cash items such as real estate asset depreciation and amortization, and after similar adjustments for unconsolidated partnerships and joint ventures. The most comparable GAAP measure is net income (loss) attributable to common shareholders or common unitholders. FFO attributable to common shareholders or common unitholders should not be considered as a substitute for net income (loss) attributable to common shareholders or common unitholders or any other measures derived in accordance with GAAP and may not be comparable to other similarly titled measures of other companies. FFO is calculated in accordance with the definition that was adopted by the Board of Governors of NAREIT. 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 attributable to common shareholders or common unitholders, 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. 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 assist them in comparing these operating results between periods or between different companies.

Other revenue consists of other operating revenues not identified with one of our operating segments. We do not allocate interest expense and certain other non-property specific revenues and expenses ("Non-Segment Items," as shown in the table below) to our individual operating segments in determining our performance measure. Thus, the operational performance measure presented here on a segment-level basis represents net earnings, excluding depreciation expense and the Non-Segment Items not allocated, and is not meant to present FFO as defined by NAREIT. The following table shows (i) the revenues for each of the reportable segments and (ii) a reconciliation of FFO attributable to common shareholders or common unitholders to net income (loss) attributable to common shareholders or common unitholders for the three and nine months ended September 30,2013 and 2012, respectively (in thousands): 

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Revenues
Rental Operations:
Industrial	$	123,749	$	107,345	$	357,777	$	321,524
Office	66,691		65,290		198,890		194,038
Medical Office	35,093		21,108		101,733		59,336
Non-reportable Rental Operations	1,765		1,429		5,807		5,276
Service Operations	62,807		93,932		161,004		226,507
Total segment revenues	290,105		289,104		825,211		806,681
Other revenue	1,585		4,154		4,023		6,396
Consolidated revenue from continuing operations	291,690		293,258		829,234		813,077
Discontinued operations	3,912		9,774		18,419		32,868
Consolidated revenue	$	295,602	$	303,032	$	847,653	$	845,945

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Reconciliation of Funds From Operations
Net earnings excluding depreciation and Non-Segment Items:
Industrial	$	92,052		$	79,803		$	266,044		$	240,605
Office	38,842			37,193			116,385			113,425
Medical Office	23,533			13,756			67,976			38,842
Non-reportable Rental Operations	1,150			806			3,853			3,644
Service Operations	3,415			6,213			18,079			16,988
	158,992			137,771			472,337			413,504
Non-Segment Items:
Interest expense	(58,100		)	(58,812		)	(176,005		)	(175,726		)
Impairment charges on non-depreciable properties	—			—			(3,777		)	—
Interest and other income, net	145			150			1,219			394
Other operating expenses	(47		)	(130		)	(150		)	(591		)
General and administrative expenses	(10,373		)	(8,934		)	(33,225		)	(32,367		)
Gain on land sales	3,365			—			3,365			—
Undeveloped land carrying costs	(2,108		)	(2,140		)	(6,837		)	(6,606		)
Acquisition-related activity	(726		)	(954		)	(2,506		)	(2,563		)
Income tax benefit	4,500			103			4,500			103
Other non-segment income	(32		)	3,278			490			4,119
Net income attributable to noncontrolling interests - consolidated entities not wholly owned by the Partnership	(140		)	(59		)	(487		)	(365		)
Joint venture items	6,945			8,997			22,212			27,999
Dividends on preferred shares/Preferred Units	(7,356		)	(11,081		)	(24,261		)	(35,356		)
Adjustments for redemption of preferred shares/Preferred Units	—			—			(5,932		)	(5,730		)
Discontinued operations	1,745			2,967			6,756			11,204
FFO attributable to common unitholders of the Partnership	96,810			71,156			257,699			198,019
Net (income) loss attributable to noncontrolling interests - common limited partnership interests in the Partnership	92			459			(1,142		)	1,736
Noncontrolling interest share of FFO adjustments	(1,384		)	(1,638		)	(2,339		)	(5,358		)
FFO attributable to common shareholders of the General Partner	95,518			69,977			254,218			194,397
Depreciation and amortization on continuing operations	(103,594		)	(90,202		)	(296,791		)	(264,435		)
Depreciation and amortization on discontinued operations	(844		)	(4,937		)	(6,686		)	(15,903		)
Company's share of joint venture adjustments	(7,127		)	(8,782		)	(20,730		)	(26,008		)
Gains on depreciated property sales on continuing operations	—			403			1,108			245
Gains on depreciated property sales on discontinued operations	8,441			1,608			101,052			11,179
Gains on depreciated property sales - share of joint venture	155			2,065			48,960			2,065
Noncontrolling interest share of FFO adjustments	1,384			1,638			2,339			5,358
Net income (loss) attributable to common shareholders of the General Partner	$	(6,067	)	$	(28,230	)	$	83,470		$	(93,102	)
Add back: Net income (loss) attributable to noncontrolling interests - common limited partnership interests in the Partnership	(92		)	(459		)	1,142			(1,736		)
Net income (loss) attributable to common unitholders of the Partnership	$	(6,159	)	$	(28,689	)	$	84,612		$	(94,838	)

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The assets for each of the reportable segments at September 30, 2013 and December 31, 2012 were as follows (in thousands):

	September 30, 2013		December 31, 2012
Assets
Rental Operations:
Industrial	$	4,293,447	$	3,836,721
Office	1,672,180		1,683,314
Medical Office	1,270,802		1,202,929
Non-reportable Rental Operations	84,619		175,197
Service Operations	154,672		162,219
Total segment assets	7,475,720		7,060,380
Non-segment assets	411,119		499,721
Consolidated assets	$	7,886,839	$	7,560,101

11.    Discontinued Operations and Assets Held for Sale

The following table illustrates the number of properties in discontinued operations:

	Held for Sale at September 30, 2013	Sold in 2013	Sold in 2012	Total
Office	4	2	10	16
Industrial	1	5	17	23
Medical Office	1	3	0	4
Retail	0	1	1	2
	6	11	28	45

We allocate interest expense to discontinued operations and have included such interest expense in computing income from discontinued operations. Interest expense allocable to discontinued operations includes interest on any secured debt for properties included in discontinued operations and an allocable share of our consolidated unsecured interest expense for unencumbered properties. The allocation of unsecured interest expense to discontinued operations was based upon the gross book value of the unencumbered real estate assets included in discontinued operations as it related to the total gross book value of our unencumbered real estate assets.

The following table illustrates the operations of the buildings reflected in discontinued operations for the three and nine months ended September 30,2013 and 2012, respectively (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Revenues	$	3,912		$	9,774		$	18,419		$	32,868
Operating expenses	(1,398		)	(3,985		)	(6,993		)	(12,623		)
Depreciation and amortization	(844		)	(4,937		)	(6,686		)	(15,903		)
Operating income	1,670			852			4,740			4,342
Interest expense	(769		)	(2,822		)	(4,670		)	(9,041		)
Income (loss) before gain on sales	901			(1,970		)	70			(4,699		)
Gain on sale of depreciable properties	8,441			1,608			101,052			11,179
Income (loss) from discontinued operations	$	9,342		$	(362	)	$	101,122		$	6,480

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Dividends or distributions on preferred shares or Preferred Units and adjustments for the redemption or repurchase of preferred shares or Preferred Units are allocated entirely to continuing operations for both the General Partner and the Partnership.

Allocation of Noncontrolling Interests - General Partner

The following table illustrates the General Partner's share of the income (loss) attributable to common shareholders from continuing operations and discontinued operations, reduced by the allocation of income or loss between continuing and discontinued operations to the Limited Partner Units, for the three and nine months ended September 30,2013 and 2012, respectively (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Loss from continuing operations attributable to common shareholders	$	(15,285	)	$	(27,874	)	$	(16,286	)	$	(99,463	)
Income (loss) from discontinued operations attributable to common shareholders	9,218			(356		)	99,756			6,361
Net income (loss) attributable to common shareholders	$	(6,067	)	$	(28,230	)	$	83,470		$	(93,102	)

Allocation of Noncontrolling Interests - Partnership

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

Properties Held for Sale

At September 30, 2013, we classified six in-service properties as held-for-sale, which were included in discontinued operations, due to our intention and ability to sell these properties in the fourth quarter of 2013. The following table illustrates aggregate balance sheet information of these properties at September 30, 2013 (in thousands):

	September 30, 2013
Real estate investment, net	$	49,821
Other assets	7,969
Total assets held-for-sale	$	57,790
Accrued expenses	$	1,536
Other liabilities	1,383
Total liabilities held-for-sale	$	2,919

12.    Subsequent Events

Declaration of Dividends/Distributions

The General Partner's board of directors declared the following dividends/distributions at its regularly scheduled board meeting held on October 30, 2013:

Class of stock/units	Quarterly Amount per Share or Unit	Record Date	Payment Date
Common	$0.17	November 14, 2013	November 29, 2013
Preferred (per depositary share or unit):
Series J	$0.414063	November 14, 2013	November 29, 2013
Series K	$0.406250	November 14, 2013	November 29, 2013
Series L	$0.412500	November 14, 2013	November 29, 2013

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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 Quarterly Report on Form 10-Q (this "Report") and the consolidated financial statements and notes thereto, contained in Part IV, Item 15 of our combined Annual Report on Form 10-K for the year ended December 31, 2012, as filed with the Securities and Exchange Commission (the "SEC") on February 22, 2013 for Duke Realty Corporation (the "General Partner") and Duke Realty Limited Partnership (the "Partnership"). As used herein, 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.

Cautionary Notice Regarding Forward-Looking Statements

Certain statements contained in or incorporated by reference into this Report, including, without limitation, those related to our future operations, constitute "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. The words "believe," "estimate," "expect," "anticipate," "intend," "plan," "seek," "may," and similar expressions or statements regarding future periods are intended to identify forward-looking statements.

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

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

• The General Partner's continued qualification as a real estate investment trust ("REIT") for U.S. federal income tax purposes;

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

• Potential changes in the financial markets and interest rates;

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

• Our continuing ability to raise funds on favorable terms;

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

• Potential increases in real estate construction costs;

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

• Our ability to retain our current credit ratings;

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

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

Although we presently believe that the plans, expectations and results expressed in or suggested by the forward-looking statements are reasonable, all forward-looking statements are inherently subjective, uncertain and subject to change, as they involve substantial risks and uncertainties 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.

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This list of risks and uncertainties, however, 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 under the caption "Risk Factors" in Part II, Item 1A of this Report, and in our combined Annual Report on Form 10-K for the fiscal year ended December 31, 2012, which we filed with the SEC on February 22, 2013 for the General Partner and the Partnership. The risk factors contained in our Annual Report are updated by us from time to time in Quarterly Reports on Form 10-Q and other public filings. 

Business Overview

The General Partner is a self-administered and self-managed REIT that began operations in 1986 and is the sole general partner of the Partnership. The Partnership is a limited partnership formed in 1993, at which time all of the properties and related assets and liabilities of the General Partner, as well as proceeds from a secondary offering of the General Partner's common shares, were contributed to the Partnership. Simultaneously, the Partnership completed the acquisition of Duke Associates, a full-service commercial real estate firm operating in the Midwest whose operations began in 1972. We operate the General Partner and the Partnership as one enterprise, and therefore, our discussion and analysis refers to the General Partner and its consolidated subsidiaries, including the Partnership, collectively. A more complete description of our business, and of management's philosophy and priorities, is included in our 2012 Annual Report on Form 10-K.

At September 30, 2013, we:

• Owned or jointly controlled 771 industrial, office, medical office and other properties, of which 753 properties with more than 147.0 million square feet were in service and 18 properties with approximately 2.3 million square feet were under development. The 753 in-service properties were comprised of 645 consolidated properties with approximately 124.8 million square feet and 108 jointly controlled unconsolidated properties with more than 22.2 million square feet. The 18 properties under development consisted of 17 consolidated properties with approximately 2.0 million square feet and one jointly controlled unconsolidated property with more than 273,000 square feet.

• Owned, including through ownership interests in unconsolidated joint ventures, more than 4,400 acres of land and controlled more than 1,600 acres through purchase options.

A key component of our overall strategy is to increase our investment in quality industrial properties in both existing and select new markets and to reduce our investment in suburban office properties and other non-strategic assets.

We have four reportable operating segments at September 30, 2013, the first three of which consist of the ownership and rental of (i) industrial, (ii) office and (iii) medical office real estate investments. The operations of our industrial, office and medical office properties, along with our retail properties, are collectively referred to as "Rental Operations." Our retail properties, as well as any other properties not included in our reportable segments, do not by themselves meet the quantitative thresholds for separate presentation as a reportable segment. The fourth reportable segment consists of various real estate services such as property management, asset management, maintenance, leasing, development, general contractor and construction management to third-party property owners and joint ventures, and is collectively referred to as "Service Operations." Our reportable segments offer different products or services and are managed separately because each segment requires different operating strategies and management expertise. Our Service Operations segment also includes our taxable REIT subsidiary, a legal entity through which certain of the segment's operations are conducted.

Key Performance Indicators

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

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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 consolidated rental properties, including properties classified within both continuing and discontinued operations, at September 30, 2013 and 2012, respectively (in thousands, except percentage data):

	Total Square Feet		Percent of Total Square Feet				Percent Leased*				Average Annual Net Effective Rent**
Type	2013	2012	2013		2012		2013		2012		2013	2012
Industrial	103,310	91,808	82.8	%	81.9	%	94.7	%	94.0	%	$3.91	$3.89
Office	15,950	15,741	12.8	%	14.0	%	87.2	%	84.1	%	$13.40	$13.27
Medical Office	5,172	3,756	4.1	%	3.4	%	93.4	%	91.7	%	$21.93	$21.01
Other	348	739	0.3	%	0.7	%	83.7	%	89.4	%	$19.80	$24.12
Total	124,780	112,044	100.0	%	100.0	%	93.7	%	92.5	%	$5.82	$5.79
*Represents the percentage of total square feet leased based on executed leases and without regard to whether the leases have commenced.
**Represents average annual base rental payments per leased square foot, on a straight-line basis for the term of each lease, from space leased to tenants at the end of the most recent reporting period. This amount excludes additional amounts paid by tenants as reimbursement for operating expenses.

Leasing activity within our existing portfolio of properties as well as, to a lesser extent, acquisitions of fully leased industrial properties drove the increase in our total percent leased from September 30,2012.

Total Leasing Activity

The initial leasing of newly completed or vacant space in acquired properties is referred to as first generation lease activity. The leasing of such space that we have previously held under lease is referred to as second generation lease activity. The total leasing activity for our consolidated rental properties, expressed in square feet of leases signed during the period, is as follows for the three and nine months ended September 30,2013 and 2012, respectively (in thousands):

	Three Months Ended September 30,		Nine Months Ended September 30,
	2013	2012	2013	2012
New Leasing Activity - First Generation	1,461	902	3,307	4,058
New Leasing Activity - Second Generation	1,759	1,074	6,088	4,153
Renewal Leasing Activity	2,143	5,083	7,015	9,089
Total Leasing Activity	5,363	7,059	16,410	17,300

New Second Generation Leases

The following table sets forth the estimated costs of tenant improvements and leasing commissions, on a per square foot basis, that we are obligated to fulfill under the new second generation leases signed for our consolidated rental properties during the three and nine months ended September 30,2013 and 2012, respectively (square feet data in thousands):

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	Square Feet of New Second Generation Leases Signed		Average Term in Years		Estimated Tenant Improvement Cost per Square Foot		Leasing Commissions per Square Foot
	2013	2012	2013	2012	2013	2012	2013	2012
Three Months
Industrial	1,462	817	4.6	5.5	$1.72	$4.70	$1.28	$1.86
Office	293	253	6.0	5.9	$14.21	$18.71	$6.80	$6.96
Medical Office	4	4	4.2	5.8	$10.00	$20.00	$2.80	$7.93
Total	1,759	1,074	4.9	5.6	$3.82	$8.05	$2.20	$3.08
Nine Months
Industrial	5,125	3,343	5.0	7.1	$2.18	$2.61	$1.42	$1.50
Office	931	783	6.7	6.6	$16.97	$15.98	$7.34	$7.35
Medical Office	32	27	4.6	7.1	$10.05	$13.20	$1.43	$6.12
Total	6,088	4,153	5.2	7.0	$4.48	$5.20	$2.32	$2.63

Estimated tenant improvements and leasing commissions per square foot for industrial leases signed during the three months ended September 30, 2013 were lower when compared to the same period in 2012. The decrease is largely the result of executing longer-term leases of smaller industrial spaces that required a greater investment per square foot during the three months ended September 30, 2012. Industrial leases executed during the three months ended September 30, 2013 trended more towards larger spaces with shorter terms.

Lease Renewals

The following table summarizes our lease renewal activity within our consolidated rental properties for the three and nine months ended September 30,2013 and 2012, respectively (square feet data in thousands):

	Square Feet of Leases Renewed		Percent of Expiring Leases Renewed				Average Term in Years		Growth (Decline) in Net Effective Rents*				Estimated Tenant Improvement Cost per Square Foot				Leasing Commissions per Square Foot
	2013	2012	2013		2012		2013	2012	2013		2012		2013		2012		2013		2012
Three Months
Industrial	1,459	4,907	51.8	%	93.8	%	4.2	6.5	8.6	%	0.2	%	$	0.92	$	0.41	$	1.18	$	0.90
Office	669	169	78.5	%	47.9	%	5.0	2.4	(2.7	)%	8.2	%	$	7.21	$	2.42	$	5.28	$	1.78
Medical Office	15	7	61.2	%	48.4	%	4.0	2.8	2.5	%	5.3	%	$	4.25	$	4.43	$	2.04	$	1.15
Total	2,143	5,083	58.0	%	90.8	%	4.4	6.4	1.8	%	1.0	%	$	2.91	$	0.48	$	2.47	$	0.93
Nine Months
Industrial	5,461	8,007	54.7	%	84.2	%	4.3	5.8	3.4	%	0.5	%	$	0.68	$	0.40	$	0.85	$	0.93
Office	1,524	1,057	81.7	%	70.7	%	4.8	4.1	(1.2	)%	2.5	%	$	5.53	$	3.27	$	4.70	$	3.06
Medical Office	30	25	27.3	%	43.4	%	4.0	6.7	1.7	%	6.3	%	$	4.96	$	1.70	$	3.74	$	1.13
Total	7,015	9,089	58.7	%	82.2	%	4.4	5.6	1.1	%	1.2	%	$	1.75	$	0.74	$	1.70	$	1.18
* Represents the percentage change in net effective rent between the original leases and the renewal leases. Net effective rents represent average annual base rental payments, on a straight-line basis for the term of each lease, excluding operating expense reimbursements.

Although the industrial lease renewal rates for the three and nine months ended September 30, 2013 were lower than the comparable periods in 2012, we were able to backfill a significant portion of our industrial leases that expired in 2013 with new tenants and, when considering backfill leases and lease-up of vacant space, slightly increased in-service occupancy for our industrial properties to 94.7% at September 30, 2013, from 94.0% at September 30, 2012.

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Lease Expirations

Our ability to maintain and improve occupancy rates and net effective rents primarily depends upon our continuing ability to re-lease expiring space. The table below reflects our consolidated in-service portfolio lease expiration schedule, including square footage and annualized net effective rent, for expiring leases by property type at September 30, 2013 (in thousands, except percentage data):

	Total Consolidated Portfolio						Industrial				Office				Medical Office				Other
Year of Expiration	Square Feet		Ann. Rent Revenue*		% of Revenue		Square Feet		Ann. Rent Revenue*		Square Feet		Ann. Rent Revenue*		Square Feet		Ann.  Rent Revenue*		Square Feet		Ann.  Rent Revenue*
Remainder of 2013	3,162		$	15,381	2	%	2,913		$	12,150	209		$	2,610	40		$	621	—		$	—
2014	11,541		57,859		9	%	9,910		37,535		1,506		18,117		121		2,087		4		120
2015	11,743		62,650		9	%	9,905		38,944		1,767		22,260		63		1,270		8		176
2016	14,529		75,353		11	%	12,397		45,773		1,869		24,297		244		4,926		19		357
2017	13,244		71,575		11	%	11,445		44,435		1,451		19,772		275		5,659		73		1,709
2018	12,885		80,822		12	%	10,253		39,565		1,963		26,244		592		13,541		77		1,472
2019	11,163		58,275		9	%	9,538		33,671		1,327		17,325		289		7,046		9		233
2020	10,773		62,202		9	%	9,280		37,369		977		14,691		508		9,920		8		222
2021	7,119		42,497		6	%	5,959		23,853		806		10,317		341		8,055		13		272
2022	5,664		31,106		5	%	4,917		16,721		276		4,679		450		9,287		21		419
2023 and Thereafter	15,029		122,773		17	%	11,309		52,441		1,751		25,997		1,910		43,543		59		792
Total Leased	116,852		$	680,493	100	%	97,826		$	382,457	13,902		$	186,309	4,833		$	105,955	291		$	5,772
Total Portfolio Square Feet	124,780						103,310				15,950				5,172				348
Percent Leased	93.7	%					94.7	%			87.2	%			93.4	%			83.7	%
* Annualized rental revenue represents average annual base rental payments, on a straight-line basis for the term of each lease, from space leased to tenants at the end of the most recent reporting period. Annualized rental revenue excludes additional amounts paid by tenants as reimbursement for operating expenses.

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

Acquisition Activity

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

We acquired 15 properties during the nine months ended September 30, 2013 and 37 properties during the year ended December 31, 2012. The following table summarizes the acquisition price, percent leased at time of acquisition and in-place yields, by product type, for these acquisitions (in thousands, except percentage data):

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	Year-to-Date 2013 Acquisitions						Full Year 2012 Acquisitions
Type	Acquisition Price*		In-Place Yield**		Percent Leased at Acquisition Date***		Acquisition Price*		In-Place Yield**		Percent Leased at Acquisition Date***
Industrial	$	459,395	6.2	%	100.0	%	$	265,203	6.6	%	94.9	%
Medical Office	20,500		6.9	%	82.3	%	514,455		6.5	%	92.9	%
Total	$	479,895	6.3	%	99.7	%	$	779,658	6.5	%	94.4	%
* Includes real estate assets and net acquired lease-related intangible assets, including above or below market leases, but excludes other acquired working capital assets and liabilities.
** In-place yields of completed acquisitions are calculated as the current annualized net rental payments from space leased to tenants at the date of acquisition, divided by the acquisition price of the acquired real estate. Annualized net rental payments are comprised of base rental payments, excluding additional amounts payable by tenants as reimbursement for operating expenses, less current annualized operating expenses not recovered through tenant reimbursements.
*** Represents percentage of total square feet leased based on executed leases and without regard to whether the leases have commenced, at the date of acquisition.

Disposition Activity

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 sold11 buildings during the nine months ended September 30, 2013 and 28 buildings during the year ended December 31, 2012. 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 2013 Dispositions						Full Year 2012 Dispositions
Type	Sales Price		In-Place Yield*		Percent Leased**		Sales Price		In-Place Yield*		Percent Leased**
Industrial	$	14,160	7.3	%	54.3	%	$	60,913	8.4	%	79.3	%
Office	27,500		8.0	%	95.5	%	58,881		7.1	%	79.4	%
Medical Office	76,050		5.7	%	77.3	%	—		—	%	—	%
Other	188,000		5.0	%	89.8	%	11,400		9.0	%	80.5	%
Total	$	305,710	5.6	%	79.4	%	$	131,194	7.9	%	79.4	%
*   In-place yields of completed dispositions are calculated as current annualized net rental payments from space leased to tenants at the date of sale, divided by the sales price of the real estate. Annualized net rental payments are comprised of base rental payments, excluding additional amounts payable by tenants as reimbursement for operating expenses, less current annualized operating expenses not recovered through tenant reimbursements.
** Represents percentage of total square feet leased based on executed leases and without regard to whether the leases have commenced, at the date of sale.

Sales of wholly-owned properties during the nine months endedSeptember 30, 2013 included a 391,000 square foot retail property in South Florida for $188.0 million.

During the nine months endedSeptember 30, 2013, 17 office properties and one industrial property were sold by two of our unconsolidated joint ventures for which capital distributions to us totaled $89.5 million. Our share of gains from joint venture property sales, which are included in equity in earnings, related almost entirely to these sales and totaled $49.0 million.

Development

At September 30, 2013, we had 2.3 million square feet of property under development with total estimated costs upon completion of $435.5 million compared to 4.7 million square feet with total estimated costs upon completion of $537.5 million at September 30, 2012. The square footage and estimated costs include both consolidated and joint venture development activity at 100%.

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The following table summarizes our properties under development at September 30, 2013 (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	1,980	83%	$	347,367	$	168,786	$	178,581
Joint venture properties	273	100%	88,169		68,992		19,177
Total	2,253	85%	$	435,536	$	237,778	$	197,758

Funds From Operations

In addition to net income (loss) computed in accordance with GAAP, we assess and measure the overall operating results of the General Partner and the Partnership based upon Funds From Operations ("FFO"), which is an industry performance measure that management believes is a useful indicator of consolidated operating performance. FFO is used by industry analysts and investors as a supplemental operating performance measure of a REIT. The National Association of Real Estate Investment Trusts ("NAREIT") created FFO as a non-GAAP supplemental measure of REIT operating performance. FFO, as defined by NAREIT, represents GAAP net income (loss), excluding extraordinary items as defined under GAAP, gains or losses from sales of previously depreciated real estate assets, impairment charges related to depreciable real estate assets, plus certain non-cash items such as real estate asset depreciation and amortization, and after similar adjustments for unconsolidated partnerships and joint ventures. The most comparable GAAP measure is net income (loss) attributable to common shareholders or common unitholders. FFO attributable to common shareholders or common unitholders should not be considered as a substitute for net income (loss) attributable to common shareholders or common unitholders or any other measures derived in accordance with GAAP and may not be comparable to other similarly titled measures of other companies. FFO is calculated in accordance with the definition that was adopted by the Board of Governors of NAREIT.

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 attributable to common shareholders or common unitholders, 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. 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 REITs activity and assist them in comparing these operating results between periods or between different companies.

The following table shows a reconciliation of net income (loss) attributable to common shareholders or common unitholders to the calculation of FFO attributable to common shareholders or common unitholders for the three and nine months ended September 30,2013 and 2012, respectively (in thousands):

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	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Net income (loss) attributable to common shareholders of the General Partner	$	(6,067	)	$	(28,230	)	$	83,470		$	(93,102	)
Add back: Net income (loss) attributable to noncontrolling interests - common limited partnership interests in the Partnership	(92		)	(459		)	1,142			(1,736		)
Net income (loss) attributable to common unitholders of the Partnership	(6,159		)	(28,689		)	84,612			(94,838		)
Adjustments:
Depreciation and amortization	104,438			95,139			303,477			280,338
Company share of joint venture depreciation and amortization	7,127			8,782			20,730			26,008
Gains on depreciable property sales—wholly owned	(8,441		)	(2,011		)	(102,160		)	(11,424		)
Gains on depreciable property sales—share of joint venture	(155		)	(2,065		)	(48,960		)	(2,065		)
Funds From Operations attributable to common unitholders of the Partnership	$	96,810		$	71,156		$	257,699		$	198,019
Additional General Partner Adjustments:
Net (income) loss attributable to noncontrolling interests - common limited partnership interests in the Partnership	92			459			(1,142		)	1,736
Noncontrolling interest share of adjustments	(1,384		)	(1,638		)	(2,339		)	(5,358		)
Funds From Operations attributable to common shareholders of the General Partner	$	95,518		$	69,977		$	254,218		$	194,397

Results of Operations

A summary of our operating results and property statistics for the three and nine months ended September 30,2013 and 2012, respectively, is as follows (in thousands, except number of properties and per share or Common Unit data):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Rental and related revenue from continuing operations	$	228,883		$	199,326		$	668,230		$	586,570
General contractor and service fee revenue	62,807			93,932			161,004			226,507
Operating income	46,176			42,326			186,962			117,925
General Partner
Net income (loss) attributable to common shareholders	$	(6,067	)	$	(28,230	)	$	83,470		$	(93,102	)
Weighted average common shares outstanding	324,895			270,289			320,810			265,153
Weighted average common shares and potential dilutive securities	324,895			270,289			325,380			265,153
Partnership
Net income (loss) attributable to common unitholders	$	(6,159	)	$	(28,689	)	$	84,612		$	(94,838	)
Weighted average Common Units outstanding	329,283			274,800			325,203			270,095
Weighted average Common Units and potential dilutive securities	329,283			274,800			325,380			270,095
General Partner and Partnership
Basic income (loss) per common share or Common Unit:
Continuing operations	$	(0.05	)	$	(0.11	)	$	(0.06	)	$	(0.38	)
Discontinued operations	$	0.03		$	—		$	0.31		$	0.02
Diluted income (loss) per common share or Common Unit:
Continuing operations	$	(0.05	)	$	(0.11	)	$	(0.06	)	$	(0.38	)
Discontinued operations	$	0.03		$	—		$	0.31		$	0.02
Number of in-service consolidated properties at end of period	645			616			645			616
In-service consolidated square footage at end of period	124,780			112,044			124,780			112,044
Number of in-service joint venture properties at end of period	108			125			108			125
In-service joint venture square footage at end of period	22,224			25,238			22,224			25,238

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Comparison of Three Months Ended September 30, 2013 to Three Months Ended September 30, 2012

Rental and Related Revenue

The following table sets forth rental and related revenue from continuing operations by reportable segment for the three months ended September 30, 2013 and 2012, respectively (in thousands):

	Three Months Ended September 30,
	2013		2012
Rental and related revenue:
Industrial	$	123,749	$	107,345
Office	66,691		65,290
Medical Office	35,093		21,108
Other	3,350		5,583
Total rental and related revenue from continuing operations	$	228,883	$	199,326

The increase in rental and related revenue from continuing operations was primarily a result of acquisitions and developments placed in service since January 1, 2012. We acquired 52 properties, of which 24 were industrial and 28 were medical office, and placed 17 developments in service from January 1, 2012 to September 30, 2013, which provided incremental revenues of $29.9 million in the third quarter of 2013, as compared to the same period in 2012.

Rental Expenses and Real Estate Taxes

The following table sets forth rental expenses and real estate taxes from continuing operations by reportable segment for the three months ended September 30, 2013 and 2012, respectively (in thousands):

	Three Months Ended September 30,
	2013		2012
Rental expenses:
Industrial	$	12,856	$	11,325
Office	19,867		19,789
Medical Office	8,643		5,180
Other	1,522		893
Total rental expenses from continuing operations	$	42,888	$	37,187
Real estate taxes:
Industrial	$	18,841	$	16,217
Office	7,982		8,308
Medical Office	2,917		2,172
Other	710		606
Total real estate tax expense from continuing operations	$	30,450	$	27,303

Rental expenses from continuing operations increased by $5.7 million in the third quarter of 2013, compared to the same period in 2012. We recognized incremental rental expenses of $3.6 million associated with the 52 properties acquired and the 17 developments placed in service since January 1, 2012. The remaining increase in rental expenses was primarily a result of an increase in insurance costs.

Real estate taxes from continuing operations increased by $3.1 million in the third quarter of 2013, compared to the same period in 2012. This increase was primarily due to the 52 properties acquired and the 17 developments placed in service since January 1, 2012, which resulted in incremental real estate tax expense of $2.4 million.

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Service Operations

The following table sets forth the components of the Service Operations reportable segment for the three months ended September 30, 2013 and 2012, respectively (in thousands):

	Three Months Ended September 30,
	2013			2012
Service Operations:
General contractor and service fee revenue	$	62,807		$	93,932
General contractor and other services expenses	(59,392		)	(87,719		)
Total	$	3,415		$	6,213

Service Operations primarily consist of the leasing, property management, asset management, development, construction management and general contractor services for joint venture properties and properties owned by third parties. Service Operations are heavily influenced by the current state of the economy, as leasing and property management fees are dependent upon occupancy, while construction and development services rely on the expansion of business operations of third-party property owners and joint venture partners. General contractor and service fee revenues and expenses decreased due to lower third-party construction volume during the three months ended September 30, 2013.

Depreciation and Amortization

Depreciation and amortization expense increased from $90.2 million during the third quarter of 2012 to $103.6 million for the same period in 2013, primarily due to depreciation related to additions to our continuing operations asset base from properties acquired, which have shorter depreciable lives relative to developed properties, and developments placed in service in 2012 and the first nine months of 2013.

General and Administrative Expenses

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

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

General and administrative expenses increased from $8.9 million for the third quarter of 2012 to $10.4 million for the same period in 2013. The following table sets forth the factors that led to the increase in general and administrative expenses (in millions):

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General and administrative expenses - three-month period ended September 30, 2012	$	8.9
Increase to overall pool of overhead costs	1.9
Increased absorption of costs by wholly owned leasing and development activities (1)	(3.5		)
Reduced allocation of costs to Service Operations and Rental Operations (2)	3.1
General and administrative expenses - three-month period ended September 30, 2013	$	10.4

(1) Increased levels of wholly owned leasing activity during the three months ended September 30, 2013 resulted in a greater level of absorption of overhead costs. We capitalized $7.3 million and $6.4 million of our total overhead costs to leasing and development, respectively, for consolidated properties during the three months ended September 30, 2013, compared to capitalizing $4.6 million and $5.7 million of such costs, respectively, for the three months ended September 30, 2012. Combined overhead costs capitalized to leasing and development totaled 35.8% and 28.7% of our overall pool of overhead costs for the three months ended September 30, 2013 and 2012, respectively.

(2) The reduction in the allocation of overhead costs to Service Operations and Rental Operations resulted from reduced volumes of third-party construction projects as we increased our focus on wholly owned development. See discussion of leasing/capital costs within the Uses of Liquidity section of this Item 2 for further discussion of our wholly owned development expenditures.

Interest Expense

Interest expense allocable to continuing operations was relatively consistent, decreasing slightly from $58.8 million in the third quarter of 2012 to $58.1 million in the third quarter of 2013. Because we increased our total base of real estate assets, we carried a higher average level of unsecured borrowings during the three months ended September 30, 2013 as compared to the three months ended September 30, 2012. The borrowings during the third quarter of 2013, however, carried a lower overall weighted average interest rate than borrowings during the corresponding time period in 2012. Since June 30, 2012, we refinanced more than $730.0 million of fixed-rate debt, at generally lower rates, which was the primary driver for the overall lower weighted average interest rate.

We capitalized $3.5 million of interest costs during the three months ended September 30, 2013 compared to $2.9 million during the three months ended September 30, 2012.

Discontinued Operations

Subject to certain criteria, the results of operations for properties sold during the year to unrelated parties, or classified as held-for-sale at the end of the period, are required to be classified as discontinued operations. The property-specific components of earnings that are classified as discontinued operations include rental revenues, rental expenses, real estate taxes, allocated interest expense and depreciation expense, as well as the net gain or loss on the disposition of the properties.

The operations of 45 buildings were classified as discontinued operations for both the three months ended September 30, 2013 and September 30, 2012. These 45 buildings consist of 16 office, 23 industrial, four medical office, and two retail properties. As a result, we classified operating income, before gain on sales, of $901,000 and an operating loss, before gain on sales, of $2.0 million in discontinued operations for the three months ended September 30, 2013 and 2012, respectively.

Of the properties included in discontinued operations, two were sold during the third quarter of 2013 and four were sold during the third quarter of 2012. The gains on disposal of these properties of $8.4 million and $1.6 million for the three months ended September 30, 2013 and 2012, respectively, are also reported in discontinued operations.

Comparison of Nine Months Ended September 30, 2013 to Nine Months Ended September 30, 2012

Rental and Related Revenue

The following table sets forth rental and related revenue from continuing operations by reportable segment for the nine months ended September 30, 2013 and 2012, respectively (in thousands):

32

	Nine Months Ended September 30,
	2013		2012
Rental and related revenue:
Industrial	$	357,777	$	321,524
Office	198,890		194,038
Medical Office	101,733		59,336
Other	9,830		11,672
Total rental and related revenue from continuing operations	$	668,230	$	586,570

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

• We acquired 52 properties, of which 24 were industrial and 28 were medical office, and placed 17 developments in service from January 1, 2012 to September 30, 2013, which provided incremental revenues of $75.6 million in the nine months endedSeptember 30, 2013, as compared to the same period in 2012.

• The remaining increase in rental and related revenue from continuing operations was primarily due to increased rental expense recoveries that were attributable to an increase in snow removal costs, as the first quarter of 2012 was a significantly milder winter for many of our markets than was the first quarter of 2013, as well as due to an increase in recoverable repair and maintenance costs. Increased occupancy and rental rates within our existing base of properties also contributed, to a lesser extent, to the remaining increase in rental and related revenue from continuing operations.

Rental Expenses and Real Estate Taxes

The following table sets forth rental expenses and real estate taxes from continuing operations by reportable segment for the nine months ended September 30, 2013 and 2012, respectively (in thousands):

	Nine Months Ended September 30,
	2013		2012
Rental expenses:
Industrial	$	36,856	$	31,347
Office	58,161		56,279
Medical Office	24,079		14,428
Other	3,657		2,376
Total rental expenses from continuing operations	$	122,753	$	104,430
Real estate taxes:
Industrial	$	54,877	$	49,572
Office	24,344		24,334
Medical Office	9,678		6,066
Other	1,830		1,533
Total real estate tax expense from continuing operations	$	90,729	$	81,505

Overall, rental expenses from continuing operations increased by $18.3 million in the nine months ended September 30, 2013, compared to the same period in 2012. We recognized incremental rental expenses of $10.3 million associated with the 52 properties acquired and the 17 developments placed in service since January 1, 2012. The remaining increase in rental expenses was primarily a result of an increase in snow removal costs, as the first quarter of 2012 was a significantly milder winter for many of our markets than the first quarter of 2013, an increase in repair and maintenance costs, insurance costs and a slight increase due to higher occupancy.

Overall, real estate taxes from continuing operations increased by $9.2 million in the nine months ended September 30, 2013, compared to the same period in 2012. This increase was primarily due to the 52 properties acquired and the 17 developments placed in service since January 1, 2012, which resulted in incremental real estate tax expense of $8.1 million.

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Service Operations

The following table sets forth the components of the Service Operations reportable segment for the nine months ended September 30, 2013 and 2012, respectively (in thousands):

	Nine Months Ended September 30,
	2013			2012
Service Operations:
General contractor and service fee revenue	$	161,004		$	226,507
General contractor and other services expenses	(142,925		)	(209,519		)
Total	$	18,079		$	16,988

The increase in our earnings from Service Operations in the first nine months of 2013 compared to the first nine months of 2012 was the result of a $4.2 million recovery in the first quarter of 2013 from a sub-contractor on a previously completed third-party construction job. The impact of this recovery on Service Operations was partially offset by a decrease in third-party construction volume from the first nine months of 2012, although third-party construction projects were performed at overall higher margins during the first nine months of 2013.

Depreciation and Amortization

Depreciation and amortization expense increased from $264.4 million during the first nine months of 2012 to $296.8 million for the same period in 2013, primarily due to depreciation related to additions to our continuing operations asset base from properties acquired, which have shorter depreciable lives relative to developed properties, and developments placed in service in 2012 and the first nine months of 2013.

Equity in Earnings

Equity in earnings represents our ownership share of net income or loss from investments in unconsolidated companies that generally own and operate rental properties. Equity in earnings increased from $4.1 million in the first nine months of 2012 to $50.4 million for the same period in 2013. The increase was largely due to the sale of properties by two of our unconsolidated joint ventures in 2013. In January 2013, one of our unconsolidated joint ventures sold its only property, and we recorded $12.2 million to equity in earnings for our share of the net gain. In March 2013, we sold our interest in 17 properties within another of our unconsolidated joint ventures to our partner in that venture, resulting in $36.6 million recorded to equity in earnings for our share of the net gain on sale.

Impairment Charges

We recognized an impairment charge of $3.8 million during the nine months endedSeptember 30, 2013 related to 30 acres of land that was sold in early July 2013 for $22.2 million. This sale was the result of an unsolicited offer. We had not previously identified or actively marketed this land for disposition.

General and Administrative Expense

General and administrative expenses increased from $32.4 million for the first nine months of 2012 to $33.2 million for the same period in 2013. The following table sets forth the factors that led to the increase in general and administrative expenses from the nine months endedSeptember 30, 2012 to the nine months endedSeptember 30, 2013 (in millions):

General and administrative expenses - nine-month period ended September 30, 2012	$	32.4
Increase to overall pool of overhead costs	0.3
Increased absorption of costs by wholly owned leasing and development activities (1)	(6.4		)
Reduced allocation of costs to Service Operations and Rental Operations (2)	6.9
General and administrative expenses - nine-month period ended September 30, 2013	$	33.2

34

(1) Increased levels of wholly owned development activity during the nine months ended September 30, 2013 were partially offset by decreased levels of leasing activity, which resulted in a net overall increase in the absorption of overhead costs. We capitalized $23.9 million and $20.3 million of our total overhead costs to leasing and development, respectively, for consolidated properties during the nine months ended September 30, 2013, compared to capitalizing $24.0 million and $13.8 million of such costs, respectively, for the nine months endedSeptember 30, 2012. Combined overhead costs capitalized to leasing and development totaled 36.2% and 31.4% of our overall pool of overhead costs for 2013 and 2012, respectively.

(2) The reduction in the allocation of overhead costs to Service Operations and Rental Operations resulted from reduced volumes of third-party construction projects as we increased our focus on wholly owned development. See discussion of leasing/capital costs within the Uses of Liquidity section of this Item 2 for further discussion of our wholly owned development expenditures.

Interest Expense

Interest expense allocable to continuing operations increased slightly from $175.7 million in the first nine months of 2012 to $176.0 million in the first nine months of 2013. Because we increased our total base of real estate assets, we carried a higher average level of unsecured borrowings during the nine months ended September 30, 2013 as compared to the nine months ended September 30, 2012, which resulted in increased interest costs. The increased overall interest costs were partially offset by a lower weighted average cost of borrowing as well as increased capitalized interest due to the timing of development activities.

During the nine months ended September 30, 2013, we had more projects, which were financed in part by common equity issuances, that met the criteria for capitalization of interest. We capitalized $13.2 million of interest costs during the nine months ended September 30, 2013 compared to $6.2 million during the nine months ended September 30, 2012.

Discontinued Operations

The operations of 45 buildings were classified as discontinued operations for both the nine months ended September 30, 2013 and September 30, 2012. These 45 buildings consist of 16 office, 23 industrial, four medical office and two retail properties. As a result, we classified operating income, before gain on sales, of $70,000 and an operating loss, before gain on sales, of $4.7 million in discontinued operations for the nine months ended September 30, 2013 and 2012, respectively.

Of the properties included in discontinued operations, 11 were sold during the first nine months of 2013 and 21 were sold during the first nine months of 2012. The gains on disposal of $101.1 million and $11.2 million for the nine months ended September 30, 2013 and 2012, respectively, are reported in discontinued operations.

Liquidity and Capital Resources

Sources of Liquidity

We expect to meet our short-term liquidity requirements over the next 12 months primarily through working capital, net cash provided by operating activities and proceeds received from real estate dispositions. Our short-term liquidity requirements include payments of dividends and distributions as well as the capital expenditures needed to maintain our current real estate assets. We had $24.1 million in cash and $210.0 million of outstanding borrowings on the Partnership's $850.0 million unsecured line of credit at September 30, 2013.

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

Rental Operations

Cash flows from Rental Operations is our primary source of liquidity and provides a stable source of cash flow to fund operational expenses. We believe that this cash-based revenue stream is substantially aligned with revenue recognition (except for 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.

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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 as a temporary source of capital to fund development activities, acquire additional rental properties and provide working capital.

At September 30, 2013, 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). 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.

On May 7, 2012, the General Partner entered into an at the market equity program that allowed it to issue new common shares, from time to time, with an aggregate offering price of up to $200.0 million. The General Partner has fully utilized this program, issuing approximately 13.5 million common shares from inception of the program through May 20, 2013, resulting in gross proceeds of approximately $200.0 million. The General Partner paid approximately $4.0 million in commissions related to the sales of these common shares and, after deducting those commissions and other costs, generated net proceeds of approximately $195.4 million from the offerings.

On May 21, 2013, the General Partner entered into a new at the market equity program that allows it to issue new common shares, from time to time, with an aggregate offering price of up to $300.0 million. Through September 30, 2013, the General Partner has issued approximately 2.1 million common shares under this program, resulting in gross proceeds of approximately $34.0 million. The General Partner has paid approximately $340,000 in commissions related to the sales of these common shares and, after deducting those commissions and other costs, generated net proceeds of approximately $33.6 million from the offerings.

In January 2013, the General Partner completed a public offering of 41.4 million common shares at an issue price of $14.25 per share, resulting in gross proceeds of $590.0 million and, after underwriting fees and estimated offering costs, net proceeds of approximately $571.9 million.

The indentures (and related supplemental indentures) governing our outstanding series of notes also require us to comply with financial ratios and other covenants regarding our operations. We were in compliance with all such covenants, as well as applicable covenants under our unsecured line of credit, at September 30, 2013.

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.

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

36

portion of the proceeds from such transactions. During the nine months ended September 30, 2013, we received sale and financing distributions of $106.3 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 preferred stock; and

• other contractual obligations.

Property Investment

We continue to pursue an asset repositioning strategy that involves increasing our investment concentration in industrial and medical office properties while reducing our investment concentration in suburban office properties in certain markets. 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, along with being dependent upon identifying suitable acquisition and development opportunities, is also dependent upon our continued access to our longer-term sources of liquidity, including issuances of debt or equity securities as well as generating cash flow by disposing of selected properties.

Leasing/Capital Costs

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

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

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

The following is a summary of 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):

	Nine Months Ended September 30,
	2013		2012
Second generation tenant improvements	$	28,524	$	19,245
Second generation leasing costs	28,284		24,078
Building improvements	3,244		3,359
Total second generation capital expenditures	$	60,052	$	46,682
Development of real estate investments	$	320,698	$	176,340
Other deferred leasing costs	$	26,647	$	22,727

The increase in capital expenditures for the development of real estate investments was the result of our increased focus on wholly owned development projects. We had wholly owned properties under development with an expected cost of $347.4 million at September 30, 2013, compared to projects with an expected cost of $413.3 million at September 30, 2012. Cash outflows for real estate development investments increased from $176.3

37

million to $320.7 million due to increased construction activity, as the projects under construction in 2012 were completed and new projects were commenced. All but one of the wholly owned development projects under construction at September 30, 2012 have been completed and placed in service by September 30, 2013.

We capitalized $23.9 million and $24.0 million of overhead costs related to leasing activities, including both first and second generation leases, during the nine months endedSeptember 30,2013 and 2012, respectively. We capitalized $20.3 million and $13.8 million of overhead costs related to development activities, including both development and tenant improvement projects on first and second generation space, during the nine months endedSeptember 30, 2013 and 2012, respectively. Combined overhead costs capitalized to leasing and development totaled 36.2% and 31.4% of our overall pool of overhead costs for the nine months endedSeptember 30, 2013 and 2012, respectively. Further discussion of the capitalization of overhead costs can be found herein, in the discussion of general and administrative expenses in the Three- and Nine-Month Comparison sections of Management's Discussion and Analysis of Financial Condition and Results of Operations as well as in the Critical Accounting Policies section of Management's Discussion and Analysis of Financial Condition and Results of Operations in our combined Annual Report on Form 10-K for the year ended December 31, 2012 as filed with the SEC on February 22, 2013.

In addition to the capitalization of overhead costs discussed above, we also capitalized $13.2 million and $6.2 million of interest costs in the nine months endedSeptember 30, 2013 and 2012, respectively.

The following is a summary of our second generation capital expenditures by reportable operating segment (in thousands):

	Nine Months Ended September 30,
	2013		2012
Industrial	$	25,077	$	23,544
Office	33,585		22,678
Medical Office	1,251		434
Non-reportable segments	139		26
Total	$	60,052	$	46,682

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 Internal Revenue Code of 1986, as amended (the "Code"), in order to maintain its REIT status. Because depreciation is a non-cash expense, cash flow will typically be greater than operating income. We paid dividends or distributions of $0.17 per common share or Common Unit in the first, second and third quarters of 2013, and the General Partner's board of directors declared dividends or distributions of $0.17 per common share or Common Unit for the fourth quarter of 2013. Our future dividends or distributions will be declared at the discretion of the General Partner's board of directors and will be subject to our future capital needs and availability.

At September 30, 2013, the General Partner had three series of preferred stock outstanding. The annual dividend rates on the General Partner's preferred shares range between 6.5% and 6.625% and are paid quarterly in arrears. In February 2013, the General Partner redeemed all of its outstanding 8.375% Series O Cumulative Redeemable Preferred Shares ("Series O Shares") for a total payment of $178.0 million, thus reducing its future quarterly dividend commitments by $3.7 million.

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Debt Maturities

Debt outstanding at September 30, 2013 had a face value totaling $4.4 billion with a weighted average interest rate of 5.52% and matures at various dates through 2028. Of this total amount, we had $3.1 billion of unsecured debt, $1.2 billion of secured debt and $210.0 million outstanding on our unsecured line of credit at September 30, 2013. Scheduled principal amortization and maturities of such debt totaled $538.6 million for the nine months ended September 30, 2013.

The following is a summary of the scheduled future amortization and maturities of our indebtedness at September 30, 2013 (in thousands, except percentage data):

	Future Repayments
Year	Scheduled Amortization		Maturities		Total		Weighted Average Interest Rate of Future Repayments
Remainder of 2013	$	3,970	$	5,422	$	9,392	5.97	%
2014	16,952		350,406		367,358		6.18	%
2015	15,074		653,346		668,420		4.91	%
2016	12,666		532,261		544,927		6.09	%
2017	10,139		558,129		568,268		5.89	%
2018	7,937		550,000		557,937		4.05	%
2019	6,936		518,438		525,374		7.97	%
2020	5,381		250,000		255,381		6.73	%
2021	3,416		9,047		12,463		5.59	%
2022	3,611		600,000		603,611		4.20	%
2023	3,817		250,000		253,817		3.75	%
Thereafter	10,361		50,000		60,361		7.02	%
	$	100,260	$	4,327,049	$	4,427,309	5.52	%

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

Repurchases of Outstanding Debt and Preferred Stock

The General Partner paid $178.0 million in February 2013 to redeem its Series O Shares at par value.

To the extent that it supports our overall capital strategy, we may purchase certain of our outstanding unsecured debt prior to its stated maturity or the General Partner may redeem or repurchase certain of its outstanding series of preferred stock.

Historical Cash Flows

Cash and cash equivalents were $24.1 million and $113.2 million at September 30, 2013 and 2012, respectively. The following highlights significant changes in net cash associated with our operating, investing and financing activities (in millions):

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	Nine Months Ended September 30,
	2013			2012
General Partner
Net Cash Provided by Operating Activities	$	317.6		$	201.5
Net Cash Used for Investing Activities	$	(427.1	)	$	(505.2	)
Net Cash Provided by Financing Activities	$	99.7		$	203.0
Partnership
Net Cash Provided by Operating Activities	$	317.7		$	201.6
Net Cash Used for Investing Activities	$	(427.1	)	$	(505.2	)
Net Cash Provided by Financing Activities	$	99.6		$	202.9

Operating Activities

The receipt of rental income from Rental Operations continues to be our primary source of operating cash flows. The increase in cash flows from operations noted in the table above was primarily due to the increase in rental revenues from continuing operations, as we had a significantly lower base of income-generating assets through the first half of 2012 until the proceeds from a significant office portfolio disposition in late 2011 were fully re-invested. Also contributing to the increase is the timing of cash payments and receipts on third-party construction contracts.

Investing Activities

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

• During the nine months ended September 30, 2013, we paid cash of $372.9 million for real estate acquisitions and $30.1 million for undeveloped land acquisitions, compared to $321.1 million and $37.2 million, respectively, for real estate and undeveloped land acquisitions in the same period in 2012.

• Real estate development costs increased to $320.7 million for the nine months ended September 30, 2013 from $176.3 million for the same period in 2012 as a result of increasing our development activities.

• Sales of land and depreciated property provided $330.7 million in net proceeds for the nine months ended September 30, 2013, compared to $112.6 million for the same period in 2012.

• For the nine months ended September 30, 2013, we received $106.3 million in capital distributions, of which $89.5 million represented our share of the net proceeds from the sales by two of our unconsolidated joint ventures of 17 office properties and one industrial property, while $16.8 million represented our share of the net proceeds from a secured loan originated by another of our unconsolidated joint ventures. For the same period in 2012, we received a $4.9 million capital distribution, which represented our share of the net proceeds from the sale by one of our unconsolidated joint ventures of its sole property.

Financing Activities

The following items highlight some of the factors that account for the difference in net cash flow related to financing activities in the first nine months of 2013, compared to the same period in 2012:

• During the nine months ended September 30, 2013, the General Partner issued 45.1 million common shares for net proceeds of $632.5 million, compared to 16.9 million common shares for net proceeds of $236.3 million during the nine months ended September 30, 2012.

• In February 2013, the General Partner redeemed all of the outstanding shares of its Series O Shares for a total payment of $178.0 million. In March 2012, the General Partner redeemed all of the outstanding shares of its 6.950% Series M Cumulative Redeemable Preferred Shares for a total payment of $168.3 million.

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• In March 2013, we issued $250.0 million of senior unsecured notes that bear interest at 3.625%, have an effective interest rate of 3.72%, and mature on April 15, 2023. Additionally, in May 2013, we issued and fully drew down on a term loan with an aggregate commitment of $250.0 million that bears interest at a variable rate of LIBOR plus 1.35% and matures May 14, 2018. In June 2012, we issued $300.0 million of senior unsecured notes that bear interest at 4.375% and mature in June 2022. In September 2012, we issued an additional $300.0 million of unsecured notes that bear interest at 3.875% and mature in October 2022.

• During the nine months ended September 30, 2013, we repaid two unsecured notes with a weighted average stated rate of 5.68% at their maturity dates totaling $425.0 million. In July 2012, one of our consolidated subsidiaries repaid $21.0 million of variable rate unsecured debt, which bore interest at a rate of LIBOR plus 0.85%, at its scheduled maturity. In August 2012, we repaid $150.0 million of senior unsecured notes, which had an effective interest rate of 6.01%, at their scheduled maturity date.

• During the nine months endedSeptember 30, 2013 and 2012, we repaid $100.1 million and $95.8 million, respectively, of secured loans with the proceeds obtained from the issuance of senior unsecured debt as described above.

• For the nine months ended September 30, 2013, we decreased net borrowings on the Partnership's unsecured line of credit by $75.0 million, compared to no net change in borrowings for the same period in 2012.

• Changes in book overdrafts are classified as financing activities within our Consolidated Statements of Cash Flows. Book overdrafts were $1.0 million at September 30, 2013, compared to $45.3 million at December 31, 2012. We had no book overdrafts at September 30, 2012.

• In June2012, a newly formed subsidiary, consolidated by both the General Partner and the Partnership, borrowed $13.3 million on a secured note bearing interest at a variable rate of LIBOR plus 2.5% and maturing in June 2017.

Contractual Obligations

Aside from changes in long-term debt, there have not been material changes in our outstanding commitments since December 31, 2012, as previously discussed in our 2012 Annual Report on Form 10-K.

Off Balance Sheet Arrangements - Investments in Unconsolidated Companies

We analyze our investments in unconsolidated joint ventures to determine if they meet the criteria for classification as a variable interest entity (a "VIE") and would require consolidation. We (i) evaluate the sufficiency of the total equity at risk, (ii) review the voting rights and decision-making authority of the equity investment holders as a group and whether there are any guaranteed returns, protection against losses, or capping of residual returns within the group and (iii) establish whether activities within the venture are on behalf of an investor with disproportionately few voting rights in making this VIE determination. To the extent that we (i) are the sole entity that has the power to direct the activities of the VIE and (ii) have the obligation or rights to absorb the VIE's losses or receive its benefits, then we would be determined to be the primary beneficiary of the VIE and would consolidate it. At the end of each reporting period, we re-assess our conclusions as to which, if any, party within the VIE is considered the primary beneficiary. To the extent that our joint ventures do not qualify as VIEs, we further assess each joint venture partner's substantive participating rights to determine if the venture should be consolidated.

We have equity interests in unconsolidated partnerships and limited liability companies that primarily own and operate rental properties and hold land for development. These unconsolidated joint ventures are primarily engaged in the operations and development of industrial, office and medical office real estate properties. These investments provide us with increased market share and tenant and property diversification. The equity method of accounting is used for these investments in which we have the ability to exercise significant influence, but not control, over operating and financial policies. As a result, the assets and liabilities of these entities are not included on our balance sheet. Our investments in and advances to unconsolidated subsidiaries represented approximately 4% and 5% of our total assets at September 30, 2013 and December 31, 2012, respectively. Total assets of our unconsolidated subsidiaries were $2.0 billion and $2.5 billion at September 30, 2013 and December 31, 2012, respectively. The

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combined revenues of our unconsolidated subsidiaries totaled $181.4 million and $217.2 million for the nine months ended September 30, 2013 and 2012, respectively.

We have guaranteed the repayment of certain secured and unsecured loans of our unconsolidated subsidiaries. The outstanding balances on the guaranteed portion of these loans totaled $188.7 million at September 30, 2013.

Item 3.    Quantitative and Qualitative Disclosures About Market Risk

We are exposed to interest rate changes primarily as a result of our line of credit and our long-term borrowings. Our interest rate risk management objective is to limit the impact of interest rate changes on earnings and cash flows and to lower overall borrowing costs. To achieve our objectives, we borrow primarily at fixed rates. We do not enter into derivative or interest rate transactions for speculative purposes. We have two outstanding swaps, which fix the rates on two of our variable rate loans and are not significant to our financial statements at September 30, 2013.

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

	Remainder of 2013			2014			2015			2016			2017			Thereafter			Face Value		Fair Value
Fixed rate secured debt	$	8,784		$	113,903		$	205,452		$	391,802		$	102,016		$	309,403		$	1,131,360	$	1,220,368
Weighted average interest rate	5.99		%	5.92		%	5.30		%	5.85		%	5.96		%	7.43		%
Variable rate secured debt	$	105		$	1,363		$	742		$	755		$	13,729		$	2,500		$	19,194	$	19,195
Weighted average interest rate	3.43		%	1.22		%	2.13		%	2.15		%	3.41		%	0.20		%
Fixed rate unsecured debt	$	503		$	252,092		$	252,226		$	152,370		$	452,523		$	1,707,041		$	2,816,755	$	3,023,988
Weighted average interest rate	6.26		%	6.33		%	7.49		%	6.71		%	5.95		%	5.54		%
Variable rate unsecured notes	$	—		$	—		$	—		$	—		$	—		$	250,000		$	250,000	$	250,000
Rate at September 30, 2013	N/A			N/A			N/A			N/A			N/A			1.54		%
Unsecured line of credit	$	—		$	—		$	210,000		$	—		$	—		$	—		$	210,000	$	211,035
Rate at September 30, 2013	N/A			N/A			1.43		%	N/A			N/A			N/A

As the above table incorporates only those exposures that existed at September 30, 2013, it does not consider those exposures or positions that could arise after that date. As a result, the ultimate impact of interest rate fluctuations will depend on future exposures that arise, our hedging strategies at that time to the extent we are party to interest rate derivatives, and interest rates. Interest expense on our unsecured line of credit and our variable rate unsecured notes will be affected by fluctuations in the LIBOR indices as well as changes in our credit rating. The interest rate at such point in the future as we may renew, extend or replace our unsecured line of credit will be heavily dependent upon the state of the credit environment.

Item 4.    Controls and Procedures

Control 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,

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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.

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 presently believe that all of these proceedings to which we were subject as of September 30, 2013, 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 Annual Report on Form 10-K for the year

43

ended December 31, 2012. The risks and uncertainties described in our 2012 Annual Report on Form 10-K are not the only risks that we face. Additional risks and uncertainties not currently known to us, or that we presently deem to be immaterial, also may materially adversely affect our business, financial condition and results of operations.

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

(a) Unregistered Sales of Equity Securities

None

(b) Use of Proceeds

None

(c) Issuer Purchases of Equity Securities

From time to time, we repurchase our securities under a repurchase program that initially was approved by the board of directors and publicly announced in October 2001 (the "Repurchase Program"). On July 31, 2013, the board of directors adopted a resolution that amended and restated the Repurchase Program and delegated authority to management to repurchase a maximum of $300.0 million of common shares, $300.0 million of debt securities and $300.0 million of preferred shares (the "July 2013 Resolution"). The July 2013 Resolution will expire on April 30, 2014. We did not repurchase any securities through the Repurchase Program during the quarter ended September 30, 2013, and the maximum amounts set forth under the July 2013 Resolution for the repurchase of common shares, debt securities and preferred shares are remaining in the Repurchase Program.

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, nor has there been any material arrearage of dividends or other material uncured delinquency with respect to any class of the General Partner's preferred shares. 

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.

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Item 6. Exhibits

(a) Exhibits

3.1(i)	Fourth Amended and Restated Articles of Incorporation 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 July 30, 2009, and incorporated herein by this reference).
3.1(ii)	Amendment to the Fourth Amended and Restated Articles of Incorporation 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 July 22, 2011, and incorporated herein by this reference).
3.1(iii)	Second Amendment to the Fourth Amended and Restated Articles of Incorporation 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 March 9, 2012, and incorporated herein by this reference).
3.1(iv)	Third amendment to the Fourth 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 February 26, 2013, and incorporated herein by this reference).
3.2	Fourth Amended and Restated Bylaws of the General Partner (filed as Exhibit 3.2 to the General Partner's Current Report on Form 8-K as filed with the SEC on July 30, 2009, and incorporated herein by this reference).
3.3	Certificate of Limited Partnership of the Partnership, dated September 17, 1993 (filed as Exhibit 3.1(i) to the Partnership's Annual Report on Form 10-K for the year ended December 31, 2006 as filed with the SEC on March 13, 2007, and incorporated herein by this reference).
3.4(i)	Fourth Amended and Restated Agreement of Limited Partnership of the Partnership (filed as Exhibit 3.1 to the Partnership's Current Report on Form 8-K as filed with the SEC on November 3, 2009, and incorporated herein by this reference).
3.4(ii)	Amendment to Fourth Amended and Restated Agreement of Limited Partnership of the Partnership (filed as Exhibit 3.1 to the Partnership's Current Report on Form 8-K as filed with the SEC on July 22, 2011, and incorporated herein by this reference).
3.4(iii)	Second Amendment to Fourth Amended and Restated Agreement of Limited Partnership of the Partnership (filed as Exhibit 3.1 to the Partnership's Current Report on Form 8-K as filed with the SEC on March 9, 2012 and incorporated herein by this reference).
3.4(iv)	Third Amendment to Fourth 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 February 26, 2013, and incorporated herein by this reference).
10.1	Form of Letter Agreement Regarding Executive Severance, dated July 30, 2013, between the General Partner and Mark A. Denien.#*
11.1	Statement Regarding Computation of Earnings.***
12.1	Statement of Computation of Ratio of Earnings to Fixed Charges and Ratio of Earnings to Combined Fixed Charges and Preferred Dividends of the General Partner.*
12.2	Statement of Computation of Ratio of Earnings to Fixed Charges and Ratio of Earnings to Combined Fixed Charges and Preferred Distributions of the Partnership.*
31.1	Rule 13a-14(a) Certification of the Chief Executive Officer of the General Partner.*
31.2	Rule 13a-14(a) Certification of the Chief Financial Officer of the General Partner.*

45

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	The following materials from the General Partner's and the Partnership's Quarterly Report on Form 10-Q for the quarter ended September 30, 2013 formatted in XBRL (eXtensible Business Reporting Language): (i) the Consolidated Balance Sheets, (ii) the Consolidated Statements of Operations and Comprehensive Income, (iii) the Consolidated Statements of Cash Flows, (iv) the Consolidated Statements of Changes in Equity, and (v) the Notes to Consolidated Financial Statements.

# 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 9 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/ Dennis D. Oklak

Dennis D. Oklak

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/ Dennis D. Oklak
		Dennis D. Oklak
		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:	November 1, 2013

47

EX-10.1

EXHIBIT 10.1

DUKE REALTY CORPORATION

July 30, 2013

Mark A. Denien

Re: Executive Severance

Dear Mark,

Duke Realty Corporation (which, together with its subsidiaries, predecessors and affiliates, is referred to as the “Company”) is pleased to offer you, as a senior officer of the Company, the severance benefits described below in exchange for your agreement to protect the legitimate business interests of the Company following your separation from employment.

Benefits

Upon your separation from employment by the Company and your compliance with the obligations set forth below, you will be entitled to receive certain separation benefits. These benefits, which differ depending upon the circumstances of your separation, are:

A. If you voluntarily terminate your employment by the Company, you will be entitled to separation payments totaling an amount equal to your annual base pay in effect on the last day of the calendar year immediately preceding the calendar year in which your employment is terminated (the “Compensation Year”). The amount of any cash bonus, performance bonus, or equity-based or long-term incentive bonus received by you during or with respect to the Compensation Year will not be included as base pay. For example, if on December 31 of the Compensation Year you were being paid a base salary at the annual rate of $150,000, and in February of the year your employment terminated you received a cash bonus of $50,000 for the Compensation Year, your separation payments would total $150,000. These payments will be made to you in equal monthly installments over twelve (12) months beginning not later than sixty (60) days following your separation. The Company will withhold from any amounts payable to you all legally required federal, state, city and local taxes.

B. If the Company terminates your employment For Cause, you will be entitled to separation payments totaling ten thousand dollars ($10,000.00). “For Cause” means any of the following, as determined solely in the discretion of the Board of Directors or a committee designated by the Board of Directors: (i) your willful

and continued failure to perform your required duties as an officer or employee of the Company, (ii) any action by you which involves willful misfeasance or gross negligence, (iii) the requirement of, or direction by, a federal or state regulatory agency which has jurisdiction over the Company to terminate your employment, (iv) any conduct, action or inaction by you which causes embarrassment, diminished good will, or otherwise is deemed substantially harmful or contrary to the interests of the Company, (v) your conviction of any criminal offense which involves dishonesty or breach of trust, or (vi) any intentional breach or violation by you of a material term, condition, or covenant of any agreement between you and the Company or condition of your employment, including the Company’s Code of Conduct. Before terminating your employment For Cause, the Company must provide to you written notice of the grounds warranting For Cause termination and give you at least ten (10) days after such notice to cure and remedy your conduct to the satisfaction of the Company. These payments will be made to you in equal monthly installments over two (2) months beginning not later than sixty (60) days following your separation. The Company will withhold from any amounts payable to you all legally required federal, state, city and local taxes.

C. If the Company terminates your employment for any reason other than For Cause, and there has been no Change of Control as defined below, your termination will be considered a separation for “Other Than Cause.” You agree that a change in your status or position or duties with the Company that does not involve either a demotion or a reduction in base salary or annual incentive bonus targets will not constitute a termination of your employment by the Company. In the event the Company terminates your employment for Other Than Cause, you will be entitled to receive separation payments totaling an amount equal to two (2) times the sum of (i) your annual base pay in effect on the last day of the calendar year immediately preceding the calendar year in which your employment is terminated (the “Compensation Year”), plus (ii) any annual cash incentive bonus paid or payable to you with respect to services performed in the Compensation Year. For example, if on December 31 of the Compensation Year you were being paid a base salary at the annual rate of $100,000, and in February of the year your employment terminated you received a $50,000 annual cash incentive bonus for services performed in the Compensation Year and a long term incentive bonus valued at $25,000 for services performed in the Compensation Year, your separation payments would total $300,000 (($100,000 + $50,000) x 2). These payments will be made to you in equal monthly installments over twenty-four (24) months beginning not later than sixty (60) days following your separation. The Company will withhold from any amounts payable to you all legally required federal, state, city and local taxes.

D. If the Company terminates your employment within one (1) year of a Change in Control of the Company, or if you terminate your employment by the Company voluntarily for Good Reason, you will be entitled to receive separation payments

totaling an amount equal to three (3) times the sum of (i) your annual base pay in effect on the last day of the calendar year immediately preceding the calendar year in which your employment is terminated (the “Compensation Year”), plus (ii) any annual cash incentive bonus paid or payable to you with respect to services performed in the Compensation Year. For example, if on December 31 of the Compensation Year you were being paid a base salary at the annual rate of $100,000, and in February of the year your employment terminated you received a $50,000 annual cash incentive bonus for services performed in the Compensation Year and a long-term incentive bonus valued at $25,000 for services performed in the Compensation Year, your separation payments would total $450,000 (($100,000 + $50,000) x 3). These payments will be made to you in equal monthly installments over twenty-four (24) months beginning not later than sixty (60) days following your separation. The Company will withhold from any amounts payable to you all legally required federal, state, city and local taxes.

"Change in Control" of the Company means:

(a) a "change in control" of the Company of a nature that would be required to be reported in the Company’s next proxy statement filed under Section 14(a) of the Securities Exchange Act of 1934, as amended ("1934 Act");

(b) a "person" (as that term is used in Section 14(d)(2) of the 1934 Act), directly or indirectly, after the date of this letter becomes the beneficial owner (as defined in Rule 13d-3 under the 1934 Act) of securities representing 25% or more of the combined voting power for election of directors of the then-outstanding securities of the Company;

(c) the individuals who are directors of the Company at the beginning of any period of two consecutive years or less cease for any reason during that period to constitute at least a majority of the Board, unless the election or nomination for election of each new member of the Board was recommended or approved by vote of at least two-thirds of the members of the Board then serving who were members of the Board at the beginning of such period;

(d) the shareholders of the Company approve any dissolution or liquidation of the Company or any sale or disposition of 50% or more of the assets or business of the Company; or

(e) consummation of a merger or consolidation to which the Company is a party (other than a merger or consolidation with a wholly-owned subsidiary of the Company) or a share exchange in which the Company will exchange Company shares for shares of another corporation as a result of which the persons who were shareholders of the Company immediately before the effective date of such merger, consolidation or share exchange will have beneficial ownership of less than 50% of the combined voting power for election of directors of the surviving

corporation immediately following the effective date of such merger, consolidation or share exchange.

“Good Reason” means the occurrence of any of the following during the one (1) year period of time immediately following a Change in Control:

(a) a change in your status or position with the Company that does not represent a promotion from your status and position in effect immediately prior to a Change in Control of the Company;

(b) a forced move to a location more than sixty (60) miles from your place of business immediately prior to a Change in Control; or

(c) a reduction by the Company in your base salary and /or a reduction in the your annual incentive bonus targets as compared to that in effect immediately prior to a Change in Control. You may not terminate your employment for “Good Reason” without providing the Company with written notice of the grounds which you believe constitute “Good Reason” and giving the Company at least ten (10) days after your notice to cure and remedy its conduct.

E. In the event you terminate employment effective on or after your 62nd birthday, you will not be entitled to receive any separation benefits from the Company under Paragraphs A, B or C above.

F. In the event that you die or become disabled before you have received all of your separation payments, you, your designee in writing or, if none, your estate will receive the balance of the separation payments otherwise due to you.

G. If you violate or fail to comply with any of your obligations as set forth herein, no further payments will become due or be paid to you (or your surviving spouse, designee or estate). Any payments otherwise due to you that were delayed pursuant to paragraph J. below shall still be paid to you.

H. If you become, without obtaining advance written consent by the Company, an owner of more than 2% of any business which is substantially similar to or competes with the Company, no further payments will become due or be paid to you (or your surviving spouse, designee or estate).

I. If you become, without obtaining advance written consent by the Company, employed by, or serve as an officer, director, consultant, independent contractor, agent or representative of, any business that is substantially similar to or competes with Company, no further payments will become due or be paid to you (or your surviving spouse, designee or estate).

J. To the extent required to comply with Section 409A of the Internal Revenue Code of 1986, as amended (the “Code”), as determined by the Company’s outside counsel, one or more payments described under A, B, C or D above shall be delayed to the six month anniversary of the date of your separation from service, within the meaning of Code Section 409A.

Obligations

In order to receive the separation payments described above, you must live up to certain obligations. If you fail to do so, your right to receive separation payments will end immediately. These obligations are:

1. For a period of two (2) years following your separation from employment, you may not solicit or attempt to solicit any then-existing customer of the Company or any potential customer of the Company with whom the Company is then engaged in discussions regarding one or more specific possible transactions for purposes of providing, marketing, or selling products or services competitive with the products and/or services sold or offered by the Company. If you voluntarily terminate your employment by the Company for any reason, or if the Company terminates your employment For Cause, this two (2) year period will be reduced to one (1) year.

2. You may not use or disclose to anyone any Trade Secret belonging to the Company to which you may have had access while employed by Company. “Trade Secret” means information including, but not limited to, technical or non-technical data, a formula, a pattern or design, a compilation, a program, a device, a method, a technique, a drawing, a process, financial data, financial plans, product plans, or a list of actual or potential customers, tenants or suppliers which (a) derives economic value, actual or potential, from not being generally known to, and not being readily ascertainable by proper means by, other persons who can obtain economic value from its disclosure or use; and (b) is the subject of efforts that are reasonable under the circumstances to maintain its secrecy. “Trade Secret” does not include information that is or becomes generally known to the public; or was already known by you prior to your employment by the Company; or that you obtain from an independent source having a bona fide right to use and disclose such information; or that the Company approves for unrestricted release by express authorization.

3. For a period of two (2) years following your separation from employment, you may not use or disclose to anyone any Confidential Information belonging to the Company to which you may have had access while employed by the Company. "Confidential Information" means any data or information, other than Trade Secrets, that is important to the Company, is competitively sensitive, and is not generally known by the public. “Confidential Information” includes, without limitation: (1) the sales records, profit and performance records, pricing manuals, models and related materials, sales manuals, training manuals, selling and pricing

procedures, and financing methods of the Company; (2) customer and tenant lists, the special demands of particular customers and tenants, and the current and anticipated requirements of customers and tenants for the properties, products and services of the Company; (3) the specifications of any new properties, products or services under development by the Company; and (4) the business plans, marketing strategies, and internal financial statements and projections of the Company. “Confidential Information” does not include information that is or becomes generally known to the public; or was already known by you prior to employment by the Company; or that you obtain from an independent source having a bona fide right to use and disclose such information; or that the Company approves for unrestricted release by express authorization.

4. The payments and benefits under this agreement are conditioned upon your execution and non-revocation of a General Release of All Claims and Covenant Not to Sue, in the form in general use by the Company as of the time of your separation from employment (the “Release”). The Release (i) must be presented by the Company to you within 7 days after your separation of employment and (ii) must be executed by you, and all revocation periods shall have expired, within 60 days after your separation from employment; failing which such payments or benefits shall be forfeited. If such 60-day period spans two calendar years, the payment or benefit shall not be made or commence before the second such calendar year, even if the Release becomes irrevocable in the first such calendar year. In other words, you are not permitted to influence the calendar year of payment based on the timing of your signing of the Release.

5. For a period of one (1) year following your separation from employment by the Company, you may not, directly or indirectly, without obtaining prior approval from the Company, encourage or solicit any then-current employee of the Company to separate from employment by the Company.

6. Within two (2) days of your date of separation from employment by the Company, you must return to the Company all Trade Secrets and Confidential Information or other tangible things, including all computers, computer disks or other media, files, reports, financial data, handbooks, training materials, marketing or strategic reports, policy statements, programs, and other documents or tangible things provided to you by the Company or acquired by you as a result of your employment by the Company. You may not retain any copies or remove or participate in removing any such materials or things from the premises of Company.

7. You understand and agree that the non-solicitation and non-disclosure obligations described above are acceptable to you and are reasonable in light of the nature of the business of Company, your access to information while an employee of the Company, the opportunities, contacts, and professional development you have received during your employment by the Company and the Company’s legitimate need to protect its good will and guard against the disclosure or misuse of its proprietary information.

Once accepted by you, the terms set forth in this letter may not be amended or terminated by either you or the Company except in a written document executed by both parties. This offer, whether or not accepted by you, will not change your status as an at-will employee of Company. Any action required of or permitted by the Company under this letter shall be by resolution of the Board of Directors, by a committee of the Board of Directors, or by a person or persons authorized by resolution of the Board of Directors or a committee of the Board of Directors.

The terms of, and any dispute arising under, this letter will be governed by the laws of Indiana. You agree that any litigation arising out of or under this letter will be commenced and maintained only in the state or federal courts within the state of Indiana.

If the foregoing is acceptable to you, please so indicate by signing a copy of this letter where indicated below and returning it to the Company.

Very truly yours,

DUKE REALTY CORPORATION

By: /s/ Dennis D. Oklak

Dennis D. Oklak

Chairman and Chief Executive Officer

Agreed and accepted this 12th day of August, 2013

/s/ Mark A. Denien

Mark A. Denien

Executive Vice President & Chief Financial Officer

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)

	Nine Months Ended September 30, 2013				Year Ended December 31, 2012				Year Ended December 31, 2011				Year Ended December 31, 2010				Year Ended December 31, 2009				Year Ended December 31, 2008
Net income (loss) from continuing operations, less preferred dividends	$	(10,091	)		$	(131,400	)		$	(64,114	)		$	(25,144	)		$	(303,217	)		$	19,911
Preferred dividends	24,261				46,438				60,353				69,468				73,451				71,426
Interest expense	176,005				236,156				212,217				177,273				140,370				130,422
Earnings (loss) before fixed charges	$	190,175			$	151,194			$	208,456			$	221,597			$	(89,396	)		$	221,759
Interest expense	$	176,005			$	236,156			$	212,217			$	177,273			$	140,370			$	130,422
Interest costs capitalized	13,173				9,357				4,335				11,498				26,864				53,456
Total fixed charges	189,178				245,513				216,552				188,771				167,234				183,878
Preferred dividends	24,261				46,438				60,353				69,468				73,451				71,426
Total fixed charges and preferred dividends	$	213,439			$	291,951			$	276,905			$	258,239			$	240,685			$	255,304
Ratio of earnings to fixed charges	1.01				N/A			(2)	N/A			(4)	1.17				N/A			(7)	1.21
Ratio of earnings to fixed charges and preferred dividends	N/A			(1)	N/A			(3)	N/A			(5)	N/A			(6)	N/A			(8)	N/A		(9)

(1) N/A - The ratio is less than 1.0; deficit of $23.3 million exists for the nine months ended September 30, 2013. The calculation of earnings includes $296.8 million of non-cash depreciation and amortization expense.

(2) N/A - The ratio is less than 1.0; deficit of $94.3 million exists for the year ended December 31, 2012. The calculation of earnings includes $358.3 million of non-cash depreciation and amortization expense.

(3) N/A - The ratio is less than 1.0; deficit of $140.8 million exists for the year ended December 31, 2012. The calculation of earnings includes $358.3 million of non-cash depreciation and amortization expense.

(4) N/A - The ratio is less than 1.0; deficit of $8.1 million exists for the year ended December 31, 2011. The calculation of earnings includes $311.4 million of non-cash depreciation and amortization expense.

(5) N/A - The ratio is less than 1.0; deficit of $68.4 million exists for the year ended December 31, 2011. The calculation of earnings includes $311.4 million of non-cash depreciation and amortization expense.

(6) N/A - The ratio is less than 1.0; deficit of $36.6 million exists for the year ended December 31, 2010. The calculation of earnings includes $258.8 million of non-cash depreciation and amortization expense.

(7) N/A - The ratio is less than 1.0; deficit of $256.6 million exists for the year ended December 31, 2009. The calculation of earnings includes $229.8 million of non-cash depreciation and amortization expense.

(8) N/A - The ratio is less than 1.0; deficit of $330.1 million exists for the year ended December 31, 2009. The calculation of earnings includes $229.8 million of non-cash depreciation and amortization expense.

(9) N/A - The ratio is less than 1.0; deficit of $33.5 million exists for the year ended December 31, 2008. The calculation of earnings includes $205.2 million of non-cash depreciation and amortization expense.

EX-12.2

EXHIBIT 12.2

DUKE REALTY LIMITED PARTNERSHIP

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

COMBINED FIXED CHARGES AND PREFERRED DISTRIBUTIONS

(in thousands, except ratios)

	Nine Months Ended September 30, 2013				Year Ended December 31, 2012				Year Ended December 31, 2011				Year Ended December 31, 2010				Year Ended December 31, 2009				Year Ended December 31, 2008
Net income (loss) from continuing operations, less preferred distributions	$	(10,091	)		$	(131,400	)		$	(64,114	)		$	(25,144	)		$	(303,217	)		$	19,911
Preferred distributions	24,261				46,438				60,353				69,468				73,451				71,426
Interest expense	176,005				236,156				212,217				177,273				140,370				130,422
Earnings (loss) before fixed charges	$	190,175			$	151,194			$	208,456			$	221,597			$	(89,396	)		$	221,759
Interest expense	$	176,005			$	236,156			$	212,217			$	177,273			$	140,370			$	130,422
Interest costs capitalized	13,173				9,357				4,335				11,498				26,864				53,456
Total fixed charges	189,178				245,513				216,552				188,771				167,234				183,878
Preferred distributions	24,261				46,438				60,353				69,468				73,451				71,426
Total fixed charges and preferred distributions	$	213,439			$	291,951			$	276,905			$	258,239			$	240,685			$	255,304
Ratio of earnings to fixed charges	1.01				N/A			(2)	N/A			(4)	1.17				N/A			(7)	1.21
Ratio of earnings to fixed charges and preferred distributions	N/A			(1)	N/A			(3)	N/A			(5)	N/A			(6)	N/A			(8)	N/A		(9)

(1) N/A - The ratio is less than 1.0; deficit of $23.3 million exists for the nine months ended September 30, 2013. The calculation of earnings includes $296.8 million of non-cash depreciation and amortization expense.

(2) N/A - The ratio is less than 1.0; deficit of $94.3 million exists for the year ended December 31, 2012. The calculation of earnings includes $358.3 million of non-cash depreciation and amortization expense.

(3) N/A - The ratio is less than 1.0; deficit of $140.8 million exists for the year ended December 31, 2012. The calculation of earnings includes $358.3 million of non-cash depreciation and amortization expense.

(4) N/A - The ratio is less than 1.0; deficit of $8.1 million exists for the year ended December 31, 2011. The calculation of earnings includes $311.4 million of non-cash depreciation and amortization expense.

(5) N/A - The ratio is less than 1.0; deficit of $68.4 million exists for the year ended December 31, 2011. The calculation of earnings includes $311.4 million of non-cash depreciation and amortization expense.

(6) N/A - The ratio is less than 1.0; deficit of $36.6 million exists for the year ended December 31, 2010. The calculation of earnings includes $258.8 million of non-cash depreciation and amortization expense.

(7) N/A - The ratio is less than 1.0; deficit of $256.6 million exists for the year ended December 31, 2009. The calculation of earnings includes $229.8 million of non-cash depreciation and amortization expense.

(8) N/A - The ratio is less than 1.0; deficit of $330.1 million exists for the year ended December 31, 2009. The calculation of earnings includes $229.8 million of non-cash depreciation and amortization expense.

(9) N/A - The ratio is less than 1.0; deficit of $33.5 million exists for the year ended December 31, 2008. The calculation of earnings includes $205.2 million of non-cash depreciation and amortization expense.

EX-31.1

EXHIBIT 31.1

DUKE REALTY CORPORATION

CERTIFICATION OF THE CHIEF EXECUTIVE OFFICER

I, Dennis D. Oklak, 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: November 1, 2013

/s/ Dennis D. Oklak

Dennis D. Oklak

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: November 1, 2013

/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, Dennis D. Oklak, 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: November 1, 2013

/s/ Dennis D. Oklak

Dennis D. Oklak

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: November 1, 2013

/s/ Mark A. Denien

Mark A. Denien

Executive Vice President and Chief Financial Officer

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 September 30, 2013 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Dennis D. Oklak, 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/ Dennis D. Oklak
Dennis D. Oklak
Chairman and Chief Executive Officer
Date:	November 1, 2013

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 September 30, 2013 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:	November 1, 2013

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 September 30, 2013 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Dennis D. Oklak, 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/ Dennis D. Oklak
Dennis D. Oklak
Chairman and Chief Executive Officer of the General Partner
Date:	November 1, 2013

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 September 30, 2013 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:	November 1, 2013

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

XML

Segment Reporting

9 Months Ended

Sep. 30, 2013

Segment Reporting [Abstract]

Segment Reporting

Segment Reporting

We have four reportable operating segments at September 30, 2013, the first three of which consist of the ownership and rental of (i) industrial, (ii) office and (iii) medical office real estate investments. The operations of our industrial, office and medical office properties, along with our retail properties, are collectively referred to as "Rental Operations." Our retail properties, as well as any other properties not included in our reportable segments, do not by themselves meet the quantitative thresholds for separate presentation as a reportable segment. The fourth reportable segment consists of various real estate services such as property management, asset management, maintenance, leasing, development, general contracting and construction management to third-party property owners and joint ventures, and is collectively referred to as "Service Operations." Our reportable segments offer different products or services and are managed separately because each segment requires different operating strategies and management expertise.

We assess and measure the overall operating results of the General Partner and the Partnership based upon Funds From Operations ("FFO"), which is an industry performance measure that management believes is a useful indicator of consolidated operating performance. FFO is used by industry analysts and investors as a supplemental operating performance measure of a REIT. The National Association of Real Estate Investment Trusts ("NAREIT") created FFO as a non-GAAP supplemental measure of REIT operating performance. FFO, as defined by NAREIT, represents GAAP net income (loss), excluding extraordinary items as defined under GAAP, gains or losses from sales of previously depreciated real estate assets, impairment charges related to depreciable real estate assets, plus certain non-cash items such as real estate asset depreciation and amortization, and after similar adjustments for unconsolidated partnerships and joint ventures. The most comparable GAAP measure is net income (loss) attributable to common shareholders or common unitholders. FFO attributable to common shareholders or common unitholders should not be considered as a substitute for net income (loss) attributable to common shareholders or common unitholders or any other measures derived in accordance with GAAP and may not be comparable to other similarly titled measures of other companies. FFO is calculated in accordance with the definition that was adopted by the Board of Governors of NAREIT. 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 attributable to common shareholders or common unitholders, 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. 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 assist them in comparing these operating results between periods or between different companies.

Other revenue consists of other operating revenues not identified with one of our operating segments. We do not allocate interest expense and certain other non-property specific revenues and expenses ("Non-Segment Items," as shown in the table below) to our individual operating segments in determining our performance measure. Thus, the operational performance measure presented here on a segment-level basis represents net earnings, excluding depreciation expense and the Non-Segment Items not allocated, and is not meant to present FFO as defined by NAREIT. The following table shows (i) the revenues for each of the reportable segments and (ii) a reconciliation of FFO attributable to common shareholders or common unitholders to net income (loss) attributable to common shareholders or common unitholders for the three and nine months ended September 30,2013 and 2012, respectively (in thousands): 

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Revenues
Rental Operations:
Industrial	$	123,749	$	107,345	$	357,777	$	321,524
Office	66,691		65,290		198,890		194,038
Medical Office	35,093		21,108		101,733		59,336
Non-reportable Rental Operations	1,765		1,429		5,807		5,276
Service Operations	62,807		93,932		161,004		226,507
Total segment revenues	290,105		289,104		825,211		806,681
Other revenue	1,585		4,154		4,023		6,396
Consolidated revenue from continuing operations	291,690		293,258		829,234		813,077
Discontinued operations	3,912		9,774		18,419		32,868
Consolidated revenue	$	295,602	$	303,032	$	847,653	$	845,945

Reconciliation of Funds From Operations
Net earnings excluding depreciation and Non-Segment Items:
Industrial	$	92,052		$	79,803		$	266,044		$	240,605
Office	38,842			37,193			116,385			113,425
Medical Office	23,533			13,756			67,976			38,842
Non-reportable Rental Operations	1,150			806			3,853			3,644
Service Operations	3,415			6,213			18,079			16,988
	158,992			137,771			472,337			413,504
Non-Segment Items:
Interest expense	(58,100		)	(58,812		)	(176,005		)	(175,726		)
Impairment charges on non-depreciable properties	—			—			(3,777		)	—
Interest and other income, net	145			150			1,219			394
Other operating expenses	(47		)	(130		)	(150		)	(591		)
General and administrative expenses	(10,373		)	(8,934		)	(33,225		)	(32,367		)
Gain on land sales	3,365			—			3,365			—
Undeveloped land carrying costs	(2,108		)	(2,140		)	(6,837		)	(6,606		)
Acquisition-related activity	(726		)	(954		)	(2,506		)	(2,563		)
Income tax benefit	4,500			103			4,500			103
Other non-segment income	(32		)	3,278			490			4,119
Net income attributable to noncontrolling interests - consolidated entities not wholly owned by the Partnership	(140		)	(59		)	(487		)	(365		)
Joint venture items	6,945			8,997			22,212			27,999
Dividends on preferred shares/Preferred Units	(7,356		)	(11,081		)	(24,261		)	(35,356		)
Adjustments for redemption of preferred shares/Preferred Units	—			—			(5,932		)	(5,730		)
Discontinued operations	1,745			2,967			6,756			11,204
FFO attributable to common unitholders of the Partnership	96,810			71,156			257,699			198,019
Net (income) loss attributable to noncontrolling interests - common limited partnership interests in the Partnership	92			459			(1,142		)	1,736
Noncontrolling interest share of FFO adjustments	(1,384		)	(1,638		)	(2,339		)	(5,358		)
FFO attributable to common shareholders of the General Partner	95,518			69,977			254,218			194,397
Depreciation and amortization on continuing operations	(103,594		)	(90,202		)	(296,791		)	(264,435		)
Depreciation and amortization on discontinued operations	(844		)	(4,937		)	(6,686		)	(15,903		)
Company's share of joint venture adjustments	(7,127		)	(8,782		)	(20,730		)	(26,008		)
Gains on depreciated property sales on continuing operations	—			403			1,108			245
Gains on depreciated property sales on discontinued operations	8,441			1,608			101,052			11,179
Gains on depreciated property sales - share of joint venture	155			2,065			48,960			2,065
Noncontrolling interest share of FFO adjustments	1,384			1,638			2,339			5,358
Net income (loss) attributable to common shareholders of the General Partner	$	(6,067	)	$	(28,230	)	$	83,470		$	(93,102	)
Add back: Net income (loss) attributable to noncontrolling interests - common limited partnership interests in the Partnership	(92		)	(459		)	1,142			(1,736		)
Net income (loss) attributable to common unitholders of the Partnership	$	(6,159	)	$	(28,689	)	$	84,612		$	(94,838	)

The assets for each of the reportable segments at September 30, 2013 and December 31, 2012 were as follows (in thousands):

	September 30, 2013		December 31, 2012
Assets
Rental Operations:
Industrial	$	4,293,447	$	3,836,721
Office	1,672,180		1,683,314
Medical Office	1,270,802		1,202,929
Non-reportable Rental Operations	84,619		175,197
Service Operations	154,672		162,219
Total segment assets	7,475,720		7,060,380
Non-segment assets	411,119		499,721
Consolidated assets	$	7,886,839	$	7,560,101

XML

Consolidated Statements of Operations and Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues:
Rental and related revenue	$ 228,883	$ 199,326	$ 668,230	$ 586,570
General contractor and service fee revenue	62,807	93,932	161,004	226,507
Revenues, total	291,690	293,258	829,234	813,077
Expenses:
Rental expenses	42,888	37,187	122,753	104,430
Real estate taxes	30,450	27,303	90,729	81,505
General contractor and other services expenses	59,392	87,719	142,925	209,519
Depreciation and amortization	103,594	90,202	296,791	264,435
Costs and expenses, total	236,324	242,411	653,198	659,889
Other operating activities:
Equity in earnings (loss) of unconsolidated companies	(27)	2,280	50,442	4,056
Gain on sale of properties	0	403	1,108	245
Earnings from sales of land	3,365	0	3,365	0
Undeveloped land carrying costs	(2,108)	(2,140)	(6,837)	(6,606)
Asset impairment charges	0	0	(3,777)	0
Other operating expenses	(47)	(130)	(150)	(591)
General and administrative expenses	(10,373)	(8,934)	(33,225)	(32,367)
Other operating transactions, total	(9,190)	(8,521)	10,926	(35,263)
Operating income	46,176	42,326	186,962	117,925
Other income (expenses):
Interest and other income, net	145	150	1,219	394
Interest expense	(58,100)	(58,812)	(176,005)	(175,726)
Acquisition-related activity	(726)	(954)	(2,506)	(2,563)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	(12,505)	(17,290)	9,670	(59,970)
Income Tax Benefit	4,500	103	4,500	103
Income (loss) from continuing operations	(8,005)	(17,187)	14,170	(59,867)
Discontinued operations:
Income (loss) before gain on sales	901	(1,970)	70	(4,699)
Gain on sale of depreciable properties	8,441	1,608	101,052	11,179
Income (loss) from discontinued operations	9,342	(362)	101,122	6,480
Net income (loss)	1,337	(17,549)	115,292	(53,387)
Dividends on preferred shares/units	(7,356)	(11,081)	(24,261)	(35,356)
Adjustments for redemption of preferred shares/units	0	0	(5,932)	(5,730)
Net (income) loss attributable to noncontrolling interests	(48)	400	(1,629)	1,371
Net income (loss) attributable to common shareholders/unitholders	(6,067)	(28,230)	83,470	(93,102)
Basic net income (loss) per common share/unit:
Continuing operations attributable to common shareholders/unitholders	$ (0.05)	$ (0.11)	$ (0.06)	$ (0.38)
Discontinued operations attributable to common shareholders/unitholders	$ 0.03	$ 0.00	$ 0.31	$ 0.02
Total	$ (0.02)	$ (0.11)	$ 0.25	$ (0.36)
Diluted net income (loss) per common share/unit:
Continuing operations attributable to common shareholders/unitholders	$ (0.05)	$ (0.11)	$ (0.06)	$ (0.38)
Discontinued operations attributable to common shareholders/unitholders	$ 0.03	$ 0.00	$ 0.31	$ 0.02
Total	$ (0.02)	$ (0.11)	$ 0.25	$ (0.36)
Weighted average number of common shares/units outstanding	324,895	270,289	320,810	265,153
Weighted average number of common shares/units and potential dilutive securities	324,895	270,289	325,380	265,153
Comprehensive income (loss):
Net income (loss)	1,337	(17,549)	115,292	(53,387)
Other comprehensive income:
Amortization of interest contracts	(116)	457	567	1,371
Other	(54)	(47)	522	(181)
Total other comprehensive income	(170)	410	1,089	1,190
Comprehensive income (loss)	1,167	(17,139)	116,381	(52,197)
Subsidiary of Common Parent [Member]
Revenues:
Rental and related revenue	228,883	199,326	668,230	586,570
General contractor and service fee revenue	62,807	93,932	161,004	226,507
Revenues, total	291,690	293,258	829,234	813,077
Expenses:
Rental expenses	42,888	37,187	122,753	104,430
Real estate taxes	30,450	27,303	90,729	81,505
General contractor and other services expenses	59,392	87,719	142,925	209,519
Depreciation and amortization	103,594	90,202	296,791	264,435
Costs and expenses, total	236,324	242,411	653,198	659,889
Other operating activities:
Equity in earnings (loss) of unconsolidated companies	(27)	2,280	50,442	4,056
Gain on sale of properties	0	403	1,108	245
Earnings from sales of land	3,365	0	3,365	0
Undeveloped land carrying costs	(2,108)	(2,140)	(6,837)	(6,606)
Asset impairment charges	0	0	(3,777)	0
Other operating expenses	(47)	(130)	(150)	(591)
General and administrative expenses	(10,373)	(8,934)	(33,225)	(32,367)
Other operating transactions, total	(9,190)	(8,521)	10,926	(35,263)
Operating income	46,176	42,326	186,962	117,925
Other income (expenses):
Interest and other income, net	145	150	1,219	394
Interest expense	(58,100)	(58,812)	(176,005)	(175,726)
Acquisition-related activity	(726)	(954)	(2,506)	(2,563)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	(12,505)	(17,290)	9,670	(59,970)
Income Tax Benefit	4,500	103	4,500	103
Income (loss) from continuing operations	(8,005)	(17,187)	14,170	(59,867)
Discontinued operations:
Income (loss) before gain on sales	901	(1,970)	70	(4,699)
Gain on sale of depreciable properties	8,441	1,608	101,052	11,179
Income (loss) from discontinued operations	9,342	(362)	101,122	6,480
Net income (loss)	1,337	(17,549)	115,292	(53,387)
Dividends on preferred shares/units	(7,356)	(11,081)	(24,261)	(35,356)
Adjustments for redemption of preferred shares/units	0	0	(5,932)	(5,730)
Noncontrolling Interest in Net Income (Loss) Joint Venture Partners, NonRedeemable	(140)	(59)	(487)	(365)
Net income (loss) attributable to common shareholders/unitholders	(6,159)	(28,689)	84,612	(94,838)
Basic net income (loss) per common share/unit:
Continuing operations attributable to common shareholders/unitholders	$ (0.05)	$ (0.11)	$ (0.06)	$ (0.38)
Discontinued operations attributable to common shareholders/unitholders	$ 0.03	$ 0.00	$ 0.31	$ 0.02
Total	$ (0.02)	$ (0.11)	$ 0.25	$ (0.36)
Diluted net income (loss) per common share/unit:
Continuing operations attributable to common shareholders/unitholders	$ (0.05)	$ (0.11)	$ (0.06)	$ (0.38)
Discontinued operations attributable to common shareholders/unitholders	$ 0.03	$ 0.00	$ 0.31	$ 0.02
Total	$ (0.02)	$ (0.11)	$ 0.25	$ (0.36)
Weighted average number of common shares/units outstanding	329,283	274,800	325,203	270,095
Weighted average number of common shares/units and potential dilutive securities	329,283	274,800	325,380	270,095
Comprehensive income (loss):
Net income (loss)	1,337	(17,549)	115,292	(53,387)
Other comprehensive income:
Amortization of interest contracts	(116)	457	567	1,371
Other	(54)	(47)	522	(181)
Total other comprehensive income	(170)	410	1,089	1,190
Comprehensive income (loss)	$ 1,167	$ (17,139)	$ 116,381	$ (52,197)

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OCI (Notes)

9 Months Ended

Sep. 30, 2013

Accumulated Other Comprehensive Income [Abstract]

Comprehensive Income (Loss) Note [Text Block]

Other Comprehensive Income

In February 2013, the Financial Accounting Standards Board issued Accounting Standards Update No. 2013-02, Other Comprehensive Income (Topic 220): Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income ("ASU 2013-02"), which was effective for us beginning with the three months ended March 31, 2013. ASU 2013-02 requires presentation of significant amounts reclassified out of accumulated other comprehensive income. Activity within other comprehensive income or loss includes the amortization to interest expense, over the lives of previously hedged loans, of the values of interest rate swaps that have been settled, as well as changes in the fair values of currently outstanding interest rate swaps that we have designated as cash flow hedges. Activity within other comprehensive income is not material for any individual type of activity, as well as for all activities in the aggregate, for all periods presented in this Report.

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Net Income (Loss) Per Common Share (Tables)

9 Months Ended

Sep. 30, 2013

Earnings Per Share [Abstract]

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

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
General Partner
Net income (loss) attributable to common shareholders	$	(6,067	)	$	(28,230	)	$	83,470		$	(93,102	)
Less: Dividends on participating securities	(650		)	(680		)	(2,024		)	(2,388		)
Basic net income (loss) attributable to common shareholders	(6,717		)	(28,910		)	81,446			(95,490		)
Noncontrolling interest in earnings of common unitholders	—			—			1,142			—
Diluted net income (loss) attributable to common shareholders	$	(6,717	)	$	(28,910	)	$	82,588		$	(95,490	)
Weighted average number of common shares outstanding	324,895			270,289			320,810			265,153
Weighted average Limited Partner Units outstanding	—			—			4,393			—
Other potential dilutive shares	—			—			177			—
Weighted average number of common shares and potential dilutive securities	324,895			270,289			325,380			265,153
Partnership
Net income (loss) attributable to common unitholders	$	(6,159	)	$	(28,689	)	$	84,612		$	(94,838	)
Less: Distributions on participating securities	(650		)	(680		)	(2,024		)	(2,388		)
Basic and diluted net income (loss) attributable to common unitholders	$	(6,809	)	$	(29,369	)	$	82,588		$	(97,226	)
Weighted average number of Common Units outstanding	329,283			274,800			325,203			270,095
Other potential dilutive units	—			—			177			—
Weighted average number of Common Units and potential dilutive securities	329,283			274,800			325,380			270,095

Computation of Anti-Dilutive Common Share

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013		2012
General Partner
Noncontrolling interest in loss of common unitholders	$	(92	)	$	(459	)	$	—	$	(1,736	)
Weighted average Limited Partner Units outstanding	4,388			4,511			—		4,942
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	1,373			1,763			1,373		1,763
Outstanding participating securities	3,866			4,045			3,866		4,045

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Discontinued Operations and Assets Held for Sale

9 Months Ended

Sep. 30, 2013

Discontinued Operations and Disposal Groups [Abstract]

Discontinued Operations and Assets Held for Sale

Discontinued Operations and Assets Held for Sale

The following table illustrates the number of properties in discontinued operations:

	Held for Sale at September 30, 2013	Sold in 2013	Sold in 2012	Total
Office	4	2	10	16
Industrial	1	5	17	23
Medical Office	1	3	0	4
Retail	0	1	1	2
	6	11	28	45

We allocate interest expense to discontinued operations and have included such interest expense in computing income from discontinued operations. Interest expense allocable to discontinued operations includes interest on any secured debt for properties included in discontinued operations and an allocable share of our consolidated unsecured interest expense for unencumbered properties. The allocation of unsecured interest expense to discontinued operations was based upon the gross book value of the unencumbered real estate assets included in discontinued operations as it related to the total gross book value of our unencumbered real estate assets.

The following table illustrates the operations of the buildings reflected in discontinued operations for the three and nine months ended September 30,2013 and 2012, respectively (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Revenues	$	3,912		$	9,774		$	18,419		$	32,868
Operating expenses	(1,398		)	(3,985		)	(6,993		)	(12,623		)
Depreciation and amortization	(844		)	(4,937		)	(6,686		)	(15,903		)
Operating income	1,670			852			4,740			4,342
Interest expense	(769		)	(2,822		)	(4,670		)	(9,041		)
Income (loss) before gain on sales	901			(1,970		)	70			(4,699		)
Gain on sale of depreciable properties	8,441			1,608			101,052			11,179
Income (loss) from discontinued operations	$	9,342		$	(362	)	$	101,122		$	6,480

Dividends or distributions on preferred shares or Preferred Units and adjustments for the redemption or repurchase of preferred shares or Preferred Units are allocated entirely to continuing operations for both the General Partner and the Partnership.

Allocation of Noncontrolling Interests - General Partner

The following table illustrates the General Partner's share of the income (loss) attributable to common shareholders from continuing operations and discontinued operations, reduced by the allocation of income or loss between continuing and discontinued operations to the Limited Partner Units, for the three and nine months ended September 30,2013 and 2012, respectively (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Loss from continuing operations attributable to common shareholders	$	(15,285	)	$	(27,874	)	$	(16,286	)	$	(99,463	)
Income (loss) from discontinued operations attributable to common shareholders	9,218			(356		)	99,756			6,361
Net income (loss) attributable to common shareholders	$	(6,067	)	$	(28,230	)	$	83,470		$	(93,102	)

Allocation of Noncontrolling Interests - Partnership

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

Properties Held for Sale

At September 30, 2013, we classified six in-service properties as held-for-sale, which were included in discontinued operations, due to our intention and ability to sell these properties in the fourth quarter of 2013. The following table illustrates aggregate balance sheet information of these properties at September 30, 2013 (in thousands):

	September 30, 2013
Real estate investment, net	$	49,821
Other assets	7,969
Total assets held-for-sale	$	57,790
Accrued expenses	$	1,536
Other liabilities	1,383
Total liabilities held-for-sale	$	2,919

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Related Party Transactions (Schedule of Fees Earned from Related Parties) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Management Fees [Member]
Revenue from related party transactions	$ 2,246	$ 2,796	$ 6,872	$ 8,251
Leasing Fees [Member]
Revenue from related party transactions	310	622	1,432	2,856
Construction and Development Fees [Member]
Revenue from related party transactions	$ 681	$ 1,860	$ 3,258	$ 3,615

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Subsequent Events (Tables)

9 Months Ended

Sep. 30, 2013

Subsequent Events [Abstract]

Schedule of Dividends Declared

Class of stock/units	Quarterly Amount per Share or Unit	Record Date	Payment Date
Common	$0.17	November 14, 2013	November 29, 2013
Preferred (per depositary share or unit):
Series J	$0.414063	November 14, 2013	November 29, 2013
Series K	$0.406250	November 14, 2013	November 29, 2013
Series L	$0.412500	November 14, 2013	November 29, 2013

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Discontinued Operations and Assets Held for Sale (Tables)

9 Months Ended

Sep. 30, 2013

Discontinued Operations and Disposal Groups [Abstract]

Table Illustration of Number of Properties in Discontinued Operations

	Held for Sale at September 30, 2013	Sold in 2013	Sold in 2012	Total
Office	4	2	10	16
Industrial	1	5	17	23
Medical Office	1	3	0	4
Retail	0	1	1	2
	6	11	28	45

Table Illustration of Discontinued Operations in Statement of Operations

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Revenues	$	3,912		$	9,774		$	18,419		$	32,868
Operating expenses	(1,398		)	(3,985		)	(6,993		)	(12,623		)
Depreciation and amortization	(844		)	(4,937		)	(6,686		)	(15,903		)
Operating income	1,670			852			4,740			4,342
Interest expense	(769		)	(2,822		)	(4,670		)	(9,041		)
Income (loss) before gain on sales	901			(1,970		)	70			(4,699		)
Gain on sale of depreciable properties	8,441			1,608			101,052			11,179
Income (loss) from discontinued operations	$	9,342		$	(362	)	$	101,122		$	6,480

Allocation of Common Shareholders' Income (Loss) Between Continuing and Discontinued Operations

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Loss from continuing operations attributable to common shareholders	$	(15,285	)	$	(27,874	)	$	(16,286	)	$	(99,463	)
Income (loss) from discontinued operations attributable to common shareholders	9,218			(356		)	99,756			6,361
Net income (loss) attributable to common shareholders	$	(6,067	)	$	(28,230	)	$	83,470		$	(93,102	)

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

The following table illustrates aggregate balance sheet information of these properties at September 30, 2013 (in thousands):

	September 30, 2013
Real estate investment, net	$	49,821
Other assets	7,969
Total assets held-for-sale	$	57,790
Accrued expenses	$	1,536
Other liabilities	1,383
Total liabilities held-for-sale	$	2,919

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Discontinued Operations and Assets Held for Sale (Aggregate Balance Sheet of Properties Held for Sale Included in Discontinued Operations) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013 buildings
Discontinued Operations
Discontinued Operation, Number of In-service Properties Held for Sale	6
Real estate investment, net	$ 49,821
Other assets	7,969
Total assets held-for-sale	57,790
Accrued expenses	1,536
Other liabilities	1,383
Total liabilities held-for-sale	$ 2,919

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Indebtedness Secured Debt (Details) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Debt Instrument [Line Items]
Repayments of Secured Debt	$ 112,097,000	$ 107,240,000
Fixed Rate Secured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage Rate Range, Minimum	3.50%
Debt Instrument, Interest Rate, Effective Percentage Rate Range, Maximum	4.90%
number of secured loans repaid	9
Repayments of Secured Debt	100,100,000
Repaid Debt, Weighted Average Interest Rate	5.66%
Number Of Secured Loans Assumed In Property Acquisition	3
Debt Instrument, Face Amount	99,300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt	$ 103,600,000
Assumed Debt - Weighted Average Remaining Term	1 year 9 months 9 days
Debt, Weighted Average Interest Rate	5.59%
Debt Instrument, Interest Rate, Effective Percentage	3.00%

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Net Income (Loss) Per Common Share (Computation of Anti-Dilutive Common Shares) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Noncontrolling Interest in Net Income (Loss) Operating Partnerships, Redeemable	$ 0	$ 0	$ 1,142	$ 0
Weighted Average Limited Partnership Units Outstanding	0	0	4,393	0
Anti-Dilutive [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Noncontrolling Interest in Net Income (Loss) Operating Partnerships, Redeemable	$ (92)	$ (459)	$ 0	$ (1,736)
Weighted Average Limited Partnership Units Outstanding	4,388	4,511	0	4,942
Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities	1,373	1,763	1,373	1,763
Participating Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities	3,866	4,045	3,866	4,045

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Acquisitions and Dispositions (Summary of Allocation of Fair Value of Amounts Recognized) (Details) (Other Two Thousand Thirteen Acquisitions [Member] [Domain] [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2013
Other Two Thousand Thirteen Acquisitions [Member] [Domain] [Member]
Real estate assets	$ 422,538
Lease related intangible assets	58,826
Total acquired assets	481,364
Secured debt	103,638
Below Market Lease, Gross	1,469
Other liabilities	1,448
Total assumed liabilities	106,555
Fair value of acquired assets	$ 374,809

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Discontinued Operations and Assets Held for Sale (Table Illustration of Number of Properties in Discontinued Operations) (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2013 buildings	Dec. 31, 2012 buildings
Number of properties held for sale in discontinued operations	6
Number of properties sold in discontinued operations	11	28
Total number of properties in discontinued operations	45
Office [Member]
Number of properties held for sale in discontinued operations	4
Number of properties sold in discontinued operations	2	10
Total number of properties in discontinued operations	16
Industrial [Member]
Number of properties held for sale in discontinued operations	1
Number of properties sold in discontinued operations	5	17
Total number of properties in discontinued operations	23
Medical Office [Member]
Number of properties held for sale in discontinued operations	1
Number of properties sold in discontinued operations	3	0
Total number of properties in discontinued operations	4
Retail [Member]
Number of properties held for sale in discontinued operations	0
Number of properties sold in discontinued operations	1	1
Total number of properties in discontinued operations	2

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Segment Reporting (Tables)

9 Months Ended

Sep. 30, 2013

Segment Reporting [Abstract]

Summary on Revenues and Funds from Operations

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Revenues
Rental Operations:
Industrial	$	123,749	$	107,345	$	357,777	$	321,524
Office	66,691		65,290		198,890		194,038
Medical Office	35,093		21,108		101,733		59,336
Non-reportable Rental Operations	1,765		1,429		5,807		5,276
Service Operations	62,807		93,932		161,004		226,507
Total segment revenues	290,105		289,104		825,211		806,681
Other revenue	1,585		4,154		4,023		6,396
Consolidated revenue from continuing operations	291,690		293,258		829,234		813,077
Discontinued operations	3,912		9,774		18,419		32,868
Consolidated revenue	$	295,602	$	303,032	$	847,653	$	845,945

Reconciliation of Funds From Operations
Net earnings excluding depreciation and Non-Segment Items:
Industrial	$	92,052		$	79,803		$	266,044		$	240,605
Office	38,842			37,193			116,385			113,425
Medical Office	23,533			13,756			67,976			38,842
Non-reportable Rental Operations	1,150			806			3,853			3,644
Service Operations	3,415			6,213			18,079			16,988
	158,992			137,771			472,337			413,504
Non-Segment Items:
Interest expense	(58,100		)	(58,812		)	(176,005		)	(175,726		)
Impairment charges on non-depreciable properties	—			—			(3,777		)	—
Interest and other income, net	145			150			1,219			394
Other operating expenses	(47		)	(130		)	(150		)	(591		)
General and administrative expenses	(10,373		)	(8,934		)	(33,225		)	(32,367		)
Gain on land sales	3,365			—			3,365			—
Undeveloped land carrying costs	(2,108		)	(2,140		)	(6,837		)	(6,606		)
Acquisition-related activity	(726		)	(954		)	(2,506		)	(2,563		)
Income tax benefit	4,500			103			4,500			103
Other non-segment income	(32		)	3,278			490			4,119
Net income attributable to noncontrolling interests - consolidated entities not wholly owned by the Partnership	(140		)	(59		)	(487		)	(365		)
Joint venture items	6,945			8,997			22,212			27,999
Dividends on preferred shares/Preferred Units	(7,356		)	(11,081		)	(24,261		)	(35,356		)
Adjustments for redemption of preferred shares/Preferred Units	—			—			(5,932		)	(5,730		)
Discontinued operations	1,745			2,967			6,756			11,204
FFO attributable to common unitholders of the Partnership	96,810			71,156			257,699			198,019
Net (income) loss attributable to noncontrolling interests - common limited partnership interests in the Partnership	92			459			(1,142		)	1,736
Noncontrolling interest share of FFO adjustments	(1,384		)	(1,638		)	(2,339		)	(5,358		)
FFO attributable to common shareholders of the General Partner	95,518			69,977			254,218			194,397
Depreciation and amortization on continuing operations	(103,594		)	(90,202		)	(296,791		)	(264,435		)
Depreciation and amortization on discontinued operations	(844		)	(4,937		)	(6,686		)	(15,903		)
Company's share of joint venture adjustments	(7,127		)	(8,782		)	(20,730		)	(26,008		)
Gains on depreciated property sales on continuing operations	—			403			1,108			245
Gains on depreciated property sales on discontinued operations	8,441			1,608			101,052			11,179
Gains on depreciated property sales - share of joint venture	155			2,065			48,960			2,065
Noncontrolling interest share of FFO adjustments	1,384			1,638			2,339			5,358
Net income (loss) attributable to common shareholders of the General Partner	$	(6,067	)	$	(28,230	)	$	83,470		$	(93,102	)
Add back: Net income (loss) attributable to noncontrolling interests - common limited partnership interests in the Partnership	(92		)	(459		)	1,142			(1,736		)
Net income (loss) attributable to common unitholders of the Partnership	$	(6,159	)	$	(28,689	)	$	84,612		$	(94,838	)

Reportable Segments Consolidated Assets

	September 30, 2013		December 31, 2012
Assets
Rental Operations:
Industrial	$	4,293,447	$	3,836,721
Office	1,672,180		1,683,314
Medical Office	1,270,802		1,202,929
Non-reportable Rental Operations	84,619		175,197
Service Operations	154,672		162,219
Total segment assets	7,475,720		7,060,380
Non-segment assets	411,119		499,721
Consolidated assets	$	7,886,839	$	7,560,101

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Consolidated Statement of Changes in Equity (USD $) In Thousands, unless otherwise specified	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Distributions in Excess of Net Income [Member]	Non-controlling Interest [Member]	Subsidiary of Common Parent [Member]	Subsidiary of Common Parent [Member] Preferred Stock [Member]	Subsidiary of Common Parent [Member] Common Stock [Member]	Subsidiary of Common Parent [Member] Limited Partner [Member]	Subsidiary of Common Parent [Member] Accumulated Other Comprehensive Income (Loss) [Member]	Subsidiary of Common Parent [Member] Non-controlling Interest [Member]	Subsidiary of Common Parent [Member] Stockholders' Equity, Total [Member]
Beginning Balance - Partnership at Dec. 31, 2012								$ 2,625,951	$ 625,638	$ 1,967,091	$ 21,383	$ 2,691	$ 9,148	$ 2,616,803
Beginning Balance - General Partner at Dec. 31, 2012	2,626,118	625,638	2,794	3,953,497	2,691	(1,993,206)	34,704
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	115,292					113,663	1,629	115,292	24,261	89,402	1,142		487	114,805
Other comprehensive income	1,089				1,089			1,089				1,089		1,089
Issuance of common shares	632,531		451	632,080
Capital contribution from the General Partner								632,531		632,531				632,531
Stock based compensation plan activity	7,633		7	9,378		(1,752)		7,633		7,633				7,633
Conversion of Limited Partner Units			1	337			(338)			338	(338)
Distributions to preferred shareholders/unitholders	(24,261)					(24,261)		(24,261)	(24,261)					(24,261)
Redemption of preferred shares/units	(177,955)	(177,955)		5,932		(5,932)		(177,955)	(177,955)					(177,955)
Distributions to common shareholders	(164,811)					(164,811)
Distributions to Partners								(167,092)		(164,849)	(2,243)			(167,092)
Contributions from (distributions to) noncontrolling interests, net	(2,692)						(2,692)	(449)					(449)
Ending Balance - Partnership at Sep. 30, 2013								3,012,739	447,683	2,532,146	19,944	3,780	9,186	3,003,553
Ending Balance - General Partner at Sep. 30, 2013	3,012,944	447,683	3,253	4,601,224	3,780	(2,076,299)	33,303
Beginning Balance - Partnership at Jun. 30, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,337							1,337
Other comprehensive income	(170)							(170)
Ending Balance - Partnership at Sep. 30, 2013								3,012,739
Ending Balance - General Partner at Sep. 30, 2013	$ 3,012,944

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General Basis of Presentation (Notes)

9 Months Ended

Sep. 30, 2013

Organization, Consolidation and Presentation of Financial Statements [Abstract]

General Basis of Presentation

General Basis of Presentation

The interim consolidated financial statements included herein have been prepared by Duke Realty Corporation (the "General Partner") and Duke Realty Limited Partnership (the "Partnership"). In this Report, unless the context indicates otherwise, the terms "Company," "we," "us" and "our" refer to the General Partner and the Partnership, collectively, and those entities owned or controlled by the General Partner and/or the Partnership. The 2012 year-end consolidated balance sheet data included in this Quarterly Report on Form 10-Q (this "Report") was derived from the audited financial statements in the combined Annual Report on Form 10-K of the General Partner and the Partnership for the year ended December 31, 2012, but does not include all disclosures required by accounting principles generally accepted in the United States of America ("GAAP"). The financial statements have been prepared in accordance with GAAP for interim financial information and in accordance with Rule 10-01 of Regulation S-X of the Securities Exchange Act of 1934, as amended. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation have been included. GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and revenue and expenses during the reporting period. Our actual results could differ from those estimates and assumptions. These financial statements should be read in conjunction with Management's Discussion and Analysis of Financial Condition and Results of Operations included herein and the consolidated financial statements and notes thereto included in the combined Annual Report on Form 10-K of the General Partner and the Partnership for the year ended December 31, 2012.

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

The General Partner is the sole general partner of the Partnership, owning approximately 98.7% of the common partnership interests of the Partnership ("General Partner Units") at September 30, 2013. The remaining 1.3% of the common partnership interests ("Limited Partner Units" and, together with the General Partner Units, the "Common Units") are owned by limited partners. As the sole general partner of the Partnership, the General Partner has full, exclusive and complete responsibility and discretion in the day-to-day management and control of the Partnership. The General Partner and the Partnership are operated as one enterprise. The management of the General Partner consists of the same members as the management of the Partnership. As the sole general partner with control of the Partnership, the General Partner consolidates the Partnership for financial reporting purposes, and the General Partner does not have any significant assets other than its investment in the Partnership. Therefore, the assets and liabilities of the General Partner and the Partnership are substantially the same.

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

We own and operate a portfolio primarily consisting of industrial and office properties and provide real estate services to third-party owners. Substantially all of our Rental Operations (see Note 10) are conducted through the Partnership. We conduct our Service Operations (see Note 10) through Duke Realty Services, LLC, Duke Realty Services Limited Partnership and Duke Construction Limited Partnership ("DCLP"), which are consolidated entities that are 100% owned by a combination of the General Partner and the Partnership. DCLP is owned through a taxable REIT subsidiary. The consolidated financial statements include our accounts and the accounts of our majority-owned or controlled subsidiaries.

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Variable Interest Entities

9 Months Ended

Sep. 30, 2013

Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]

Consolidation Policy for VIEs

Variable Interest Entities

At September 30, 2013, there were three unconsolidated joint ventures that met the criteria to be considered variable interest entities ("VIEs"). These three unconsolidated joint ventures were formed with the sole purpose of developing, constructing, leasing, marketing and selling or operating properties. The business activities of these unconsolidated joint ventures have been financed through a combination of equity contributions, partner/member loans, and third-party debt that is guaranteed by a combination of us and the other partner/member of each entity. All significant decisions for these unconsolidated joint ventures, including those decisions that most significantly impact each venture's economic performance, require unanimous approval of each joint venture's partners or members. In certain cases, these decisions also require lender approval. Unanimous approval requirements for these unconsolidated joint ventures include entering into new leases, setting annual operating budgets, selling underlying properties, and incurring additional indebtedness. Because no single entity exercises control over the decisions that most significantly affect each joint venture's economic performance, we determined there to be no individual primary beneficiary and that the equity method of accounting is appropriate.

The following is a summary of the carrying value in our consolidated balance sheet, as well as our maximum loss exposure under guarantees for the three unconsolidated subsidiaries that we have determined to be VIEs at September 30, 2013 (in millions):

	Carrying Value			Maximum Loss Exposure
Investment in unconsolidated companies	$	44.6		$	44.6
Guarantee obligations (1)	$	(20.3	)	$	(141.9	)

(1) We are party to guarantees of the third-party debt of these joint ventures, and our maximum loss exposure is equal to the maximum monetary obligation pursuant to the guarantee agreements. We have also recorded a liability for our probable future obligation under a guarantee to the lender of one of these ventures, which is included within the carrying value of our guarantee obligations. Pursuant to an agreement with the lender, we may make partner loans to this joint venture that will reduce our maximum guarantee obligation on a dollar-for-dollar basis. The carrying value of our recorded guarantee obligations is included in other liabilities in our Consolidated Balance Sheets.

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Reclassifications

9 Months Ended

Sep. 30, 2013

Reclassifications [Abstract]

Reclassifications

Reclassifications

Certain amounts in the accompanying consolidated financial statements for 2012 have been reclassified to conform to the 2013 consolidated financial statement presentation.

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Segment Reporting (Summary on Revenues and Funds from Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Number of Reportable Segments			4
Rental and related revenue	$ 228,883	$ 199,326	$ 668,230	$ 586,570
General contractor and service fee revenue (''Service Operations'')	62,807	93,932	161,004	226,507
Revenues	291,690	293,258	829,234	813,077
Discontinued Operations	3,912	9,774	18,419	32,868
Consolidated Revenue	295,602	303,032	847,653	845,945
Interest expense	(58,100)	(58,812)	(176,005)	(175,726)
Asset impairment charges	0	0	(3,777)	0
Interest and other income, net	145	150	1,219	394
Other operating expenses	(47)	(130)	(150)	(591)
General and administrative expenses	(10,373)	(8,934)	(33,225)	(32,367)
Earnings from sales of land	3,365	0	3,365	0
Undeveloped land carrying costs	(2,108)	(2,140)	(6,837)	(6,606)
Acquisition-related activity	(726)	(954)	(2,506)	(2,563)
Income Tax Benefit	4,500	103	4,500	103
Dividends on preferred shares/units	(7,356)	(11,081)	(24,261)	(35,356)
Adjustments for redemption of preferred shares/units	0	0	(5,932)	(5,730)
FFO Attributable To Common Unitholders of the Partnership	96,810	71,156	257,699	198,019
FFO attributable to common shareholders of the General Partner	95,518	69,977	254,218	194,397
Depreciation and amortization on continuing operations	(103,594)	(90,202)	(296,791)	(264,435)
Depreciation and amortization, discontinued operations	(844)	(4,937)	(6,686)	(15,903)
Gains on depreciated property sales on continuing operations	0	403	1,108	245
Gains on depreciated property sales on discontinued operations	8,441	1,608	101,052	11,179
Gains on depreciated property sales - share of joint venture			49,000
Net income (loss) attributable to common shareholders/unitholders	(6,067)	(28,230)	83,470	(93,102)
Net income (loss) attributable to common unitholders of the Partnership	(6,159)	(28,689)	84,612	(94,838)
Operating Segments [Member]
Revenues	290,105	289,104	825,211	806,681
Net earnings excluding depreciation and Non-Segment Items	158,992	137,771	472,337	413,504
Operating Segments [Member] | Industrial [Member]
Rental and related revenue	123,749	107,345	357,777	321,524
Net earnings excluding depreciation and Non-Segment Items	92,052	79,803	266,044	240,605
Operating Segments [Member] | Office [Member]
Rental and related revenue	66,691	65,290	198,890	194,038
Net earnings excluding depreciation and Non-Segment Items	38,842	37,193	116,385	113,425
Operating Segments [Member] | Medical Office [Member]
Rental and related revenue	35,093	21,108	101,733	59,336
Net earnings excluding depreciation and Non-Segment Items	23,533	13,756	67,976	38,842
Operating Segments [Member] | All Other Segments [Member]
Rental and related revenue	1,765	1,429	5,807	5,276
Net earnings excluding depreciation and Non-Segment Items	1,150	806	3,853	3,644
Operating Segments [Member] | Service Operations [Member]
General contractor and service fee revenue (''Service Operations'')	62,807	93,932	161,004	226,507
Net earnings excluding depreciation and Non-Segment Items	3,415	6,213	18,079	16,988
Corporate, Non-Segment [Member]
Rental and related revenue	1,585	4,154	4,023	6,396
Discontinued Operations	3,912	9,774	18,419	32,868
Interest expense	(58,100)	(58,812)	(176,005)	(175,726)
Asset impairment charges	0	0	(3,777)	0
Interest and other income, net	145	150	1,219	394
Other operating expenses	(47)	(130)	(150)	(591)
General and administrative expenses	(10,373)	(8,934)	(33,225)	(32,367)
Earnings from sales of land	3,365	0	3,365	0
Undeveloped land carrying costs	(2,108)	(2,140)	(6,837)	(6,606)
Acquisition-related activity	(726)	(954)	(2,506)	(2,563)
Income Tax Benefit	4,500	103	4,500	103
Other non-segment income	(32)	3,278	490	4,119
Noncontrolling Interest in Net Income (Loss) Joint Venture Partners, NonRedeemable	(140)	(59)	(487)	(365)
Joint venture items	6,945	8,997	22,212	27,999
Dividends on preferred shares/units	(7,356)	(11,081)	(24,261)	(35,356)
Adjustments for redemption of preferred shares/units	0	0	(5,932)	(5,730)
Discontinued operations	1,745	2,967	6,756	11,204
Net (income) loss attributable to noncontrolling interests - common limited partnership interests in the Partnership	92	459	(1,142)	1,736
Noncontrolling Interest Share of FFO Adjustments	(1,384)	(1,638)	(2,339)	(5,358)
Depreciation and amortization on continuing operations	(103,594)	(90,202)	(296,791)	(264,435)
Depreciation and amortization, discontinued operations	(844)	(4,937)	(6,686)	(15,903)
Company's share of joint venture adjustments	(7,127)	(8,782)	(20,730)	(26,008)
Gains on depreciated property sales on continuing operations	0	403	1,108	245
Gains on depreciated property sales on discontinued operations	8,441	1,608	101,052	11,179
Gains on depreciated property sales - share of joint venture	155	2,065	48,960	2,065
Noncontrolling Interest Share of FFO Adjustments, Reconciliation Add-Back	1,384	1,638	2,339	5,358
Add back: Net income (loss) attributable to noncontrolling interests - common limited partnership interests in the Partnership	$ (92)	$ (459)	$ 1,142	$ (1,736)

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General Basis of Presentation (Details)	9 Months Ended
	Sep. 30, 2013
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest	98.70%
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest	1.30%

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Acquisitions and Dispositions (Summary of Significant Assumptions Utilized in Estimates) (Details) (USD $)	9 Months Ended
	Sep. 30, 2013 months
Minimum [Member]
Fair Value Inputs, Discount Rate	6.60%
Fair Value Inputs, Cap Rate	5.10%
Lease-up period (months)	12
Minimum [Member] | Industrial [Member]
Rental rate per square foot	$ 2.95
Minimum [Member] | Medical Office [Member]
Rental rate per square foot	18.00
Maximum [Member]
Fair Value Inputs, Discount Rate	9.67%
Fair Value Inputs, Cap Rate	7.67%
Lease-up period (months)	24
Maximum [Member] | Industrial [Member]
Rental rate per square foot	8.28
Maximum [Member] | Medical Office [Member]
Rental rate per square foot	$ 18.00

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Shareholders' Equity (Details) (USD $) Share data in Millions, unless otherwise specified	1 Months Ended	3 Months Ended		9 Months Ended			1 Months Ended	9 Months Ended		9 Months Ended	1 Months Ended
	Jan. 31, 2013	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 8.375% Series O Cumulative Redeemable Preferred Shares [Member]	Jan. 31, 2013 Secondary Offering [Member]	Sep. 30, 2013 At-the-market equity issuance [Member]	Dec. 31, 2012 Line of Credit [Member]	Sep. 30, 2013 At-the-market equity issuance [Member] Gross Proceeds [Member]	Jan. 31, 2013 Secondary Offering [Member] Gross Proceeds [Member]
Preferred stock dividend rate, percentage						8.375%
Payments for Repurchase of Redeemable Preferred Stock				$ 177,955,000	$ 168,272,000	$ 178,000,000
Adjustments for redemption of preferred shares/units		0	0	(5,932,000)	(5,730,000)	(5,900,000)
Common shares, shares issued							41.4	3.7
Stock Issued During Period, Value, Other	14.25
Issuance of common shares				632,531,000	236,301,000		571,900,000	60,700,000		61,900,000	590,000,000
Line of Credit Facility, Amount Outstanding									285,000,000
Payments for Commissions								$ 897,000

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Discontinued Operations and Assets Held for Sale (Allocation of Shareholders' Income (Loss) Between Continuing and Discontinued Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Discontinued Operations
Income (loss) from continuing operations attributable to common shareholders	$ (15,285)	$ (27,874)	$ (16,286)	$ (99,463)
Income (loss) from discontinued operations attributable to common shareholders	9,218	(356)	99,756	6,361
Net income (loss) attributable to common shareholders/unitholders	$ (6,067)	$ (28,230)	$ 83,470	$ (93,102)

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Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Accounts receivable, allowance	$ 3,818	$ 3,374
Straight-line rent receivable, allowance	7,472	6,091
Deferred financing costs, accumulated amortization	52,370	48,218
Deferred leasing and other costs, accumulated amortization	413,227	372,047
Preferred shares, par value	$ 0.01	$ 0.01
Preferred shares, shares authorized	5,000,000	5,000,000
Preferred shares, shares issued	1,791,000	2,503,000
Preferred shares, shares outstanding	1,791,000	2,503,000
Common shares, par value	$ 0.01	$ 0.01
Common shares, shares authorized	400,000,000	400,000,000
Common shares, shares issued	325,319,000	279,423,000
Common shares, shares outstanding	325,319,000	279,423,000
Subsidiary of Common Parent [Member]
Accounts receivable, allowance	3,818	3,374
Straight-line rent receivable, allowance	7,472	6,091
Deferred financing costs, accumulated amortization	52,370	48,218
Deferred leasing and other costs, accumulated amortization	$ 413,227	$ 372,047
Common equity, General Partner Units issued	325,319,000	279,423,000
Common equity, General Partner Units outstanding	325,319,000	279,423,000
Preferred Units, Issued	1,791,000	2,503,000
Preferred Units, Outstanding	1,791,000	2,503,000
Limited Partner Units issued	4,388,000	4,419,000
Limited Partner Units outstanding	4,388,000	4,419,000

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Shareholders' Equity

9 Months Ended

Sep. 30, 2013

Stockholders' Equity Note [Abstract]

Shareholders' Equity

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

General Partner

In January 2013, the General Partner completed a public offering of 41.4 million common shares at an issue price of $14.25 per share, resulting in gross proceeds of $590.0 million and, after deducting underwriting fees and estimated offering costs, net proceeds of approximately $571.9 million. A portion of the net proceeds from this offering were used to repay all of the outstanding borrowings under the Partnership's existing revolving credit facility, which had an outstanding balance of $285.0 million at December 31, 2012, and the remaining proceeds were used to redeem all of the General Partner's outstanding 8.375% Series O Cumulative Redeemable Preferred Shares ("Series O Shares") and for general corporate purposes.

In February 2013, the General Partner redeemed all of the outstanding shares of its Series O Shares at their liquidation amount of $178.0 million. Original offering costs of $5.9 million were included as a reduction to net income attributable to common shareholders in conjunction with the redemption of these shares.

In the first nine months of 2013, the General Partner issued 3.7 million common shares pursuant to its at the market equity program, generating gross proceeds of approximately $61.9 million and, after deducting commissions and other costs, net proceeds of approximately $60.7 million. The General Partner paid approximately $897,000 in commissions related to the sale of these common shares. The proceeds from these offerings were used for general corporate purposes, which include the funding of development costs.

Partnership

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

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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:
Net income (loss)	$ 115,292	$ (53,387)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	214,118	193,479
Amortization of deferred leasing and other costs	89,359	86,859
Amortization of deferred financing costs	9,913	9,878
Straight-line rent adjustment	(12,421)	(15,725)
Asset impairment charges	3,777	0
Gain on acquisitions	(962)	0
Gains on land and depreciated property sales	(105,525)	(11,424)
Third-party construction contracts, net	27,117	(4,295)
Other accrued revenues and expenses, net	11,367	(14,621)
Operating distributions received in excess of (less than) equity in earnings from unconsolidated companies	(34,411)	10,772
Net cash provided by operating activities	317,624	201,536
Cash flows from investing activities:
Development of real estate investments	(320,698)	(176,340)
Acquisition of real estate investments and related intangible assets	(372,934)	(321,099)
Acquisition of undeveloped land	(30,101)	(37,166)
Second generation tenant improvements, leasing costs and building improvements	(60,052)	(46,682)
Other deferred leasing costs	(26,647)	(22,727)
Other assets	(14,725)	674
Proceeds from land and depreciated property sales, net	330,740	112,559
Capital distributions from unconsolidated companies	106,306	4,890
Capital contributions and advances to unconsolidated companies	(38,959)	(19,262)
Net cash provided by (used for) investing activities	(427,070)	(505,153)
Cash flows from financing activities:
Proceeds from issuance of common shares, net	632,531	236,301
Payments for redemption of preferred shares/units	(177,955)	(168,272)
Proceeds from unsecured debt	500,000	600,000
Payments on unsecured debt	(426,462)	(172,374)
Proceeds from secured debt financings	1,933	13,305
Payments on secured indebtedness including principal amortization	(112,097)	(107,240)
Borrowings (payments) on lines of credit, net	(75,000)	(20,293)
Dividends/Distributions to common shareholders/unitholders	(164,811)	(135,083)
Dividends/Distributions to preferred shareholders/unitholders	(24,261)	(31,630)
Contributions from (distributions to) noncontrolling interests, net	(2,692)	2,788
Buyout of noncontrolling interests	0	(6,208)
Change in book overdrafts	(44,225)	0
Deferred financing costs	(7,292)	(8,334)
Net cash provided by (used for) financing activities	99,669	202,960
Net increase (decrease) in cash and cash equivalents	(9,777)	(100,657)
Cash and cash equivalents at beginning of period	33,889	213,809
Cash and cash equivalents at end of period	24,112	113,152
Noncash investing and financing activities:
Assumption of indebtedness and other liabilities in real estate acquisitions	106,555	19,992
Carrying amount of pre-existing ownership interest in acquired property	630	0
Conversion of Limited Partner Units to common shares	338	29,002
Preferred distributions declared but not paid	0	3,726
Subsidiary of Common Parent [Member]
Cash flows from operating activities:
Net income (loss)	115,292	(53,387)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	214,118	193,479
Amortization of deferred leasing and other costs	89,359	86,859
Amortization of deferred financing costs	9,913	9,878
Straight-line rent adjustment	(12,421)	(15,725)
Asset impairment charges	3,777	0
Gain on acquisitions	(962)	0
Gains on land and depreciated property sales	(105,525)	(11,424)
Third-party construction contracts, net	27,117	(4,295)
Other accrued revenues and expenses, net	11,405	(14,582)
Operating distributions received in excess of (less than) equity in earnings from unconsolidated companies	(34,411)	10,772
Net cash provided by operating activities	317,662	201,575
Cash flows from investing activities:
Development of real estate investments	(320,698)	(176,340)
Acquisition of real estate investments and related intangible assets	(372,934)	(321,099)
Acquisition of undeveloped land	(30,101)	(37,166)
Second generation tenant improvements, leasing costs and building improvements	(60,052)	(46,682)
Other deferred leasing costs	(26,647)	(22,727)
Other assets	(14,725)	674
Proceeds from land and depreciated property sales, net	330,740	112,559
Capital distributions from unconsolidated companies	106,306	4,890
Capital contributions and advances to unconsolidated companies	(38,959)	(19,262)
Net cash provided by (used for) investing activities	(427,070)	(505,153)
Cash flows from financing activities:
Contributions from the General Partner	632,531	236,301
Payments for redemption of preferred shares/units	(177,955)	(168,272)
Proceeds from unsecured debt	500,000	600,000
Payments on unsecured debt	(426,462)	(172,374)
Proceeds from secured debt financings	1,933	13,305
Payments on secured indebtedness including principal amortization	(112,097)	(107,240)
Borrowings (payments) on lines of credit, net	(75,000)	(20,293)
Dividends/Distributions to common shareholders/unitholders	(167,092)	(137,662)
Dividends/Distributions to preferred shareholders/unitholders	(24,261)	(31,630)
Contributions from (distributions to) noncontrolling interests, net	(449)	5,311
Buyout of noncontrolling interests	0	(6,208)
Change in book overdrafts	(44,225)	0
Deferred financing costs	(7,292)	(8,334)
Net cash provided by (used for) financing activities	99,631	202,904
Net increase (decrease) in cash and cash equivalents	(9,777)	(100,674)
Cash and cash equivalents at beginning of period	33,889	213,826
Cash and cash equivalents at end of period	24,112	113,152
Noncash investing and financing activities:
Assumption of indebtedness and other liabilities in real estate acquisitions	106,555	19,992
Carrying amount of pre-existing ownership interest in acquired property	630	0
Conversion of Limited Partner Units to common shares	338	29,002
Preferred distributions declared but not paid	$ 0	$ 3,726

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Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
ASSETS
Land and improvements	$ 1,443,643	$ 1,284,081
Buildings and tenant improvements	5,720,356	5,398,886
Construction in progress	197,472	234,918
Investments in and advances to unconsolidated companies	328,660	372,256
Undeveloped land	580,052	614,208
Real estate investment property, at cost, total	8,270,183	7,904,349
Accumulated depreciation	(1,384,219)	(1,296,396)
Net real estate investments	6,885,964	6,607,953
Real estate investments and other assets held-for-sale	57,790	30,937
Cash and cash equivalents	24,112	33,889
Accounts receivable, net of allowance	20,073	22,283
Straight-line rent receivable, net of allowance	124,574	120,303
Receivables on construction contracts, including retentions	28,650	39,754
Deferred financing costs, net of accumulated amortization	38,029	40,083
Deferred leasing and other costs, net of accumulated amortization	498,025	497,827
Escrow deposits and other assets	209,622	167,072
Total Assets	7,886,839	7,560,101
LIABILITIES AND EQUITY
Secured debt	1,158,456	1,167,953
Unsecured debt	3,066,755	2,993,217
Unsecured line of credit	210,000	285,000
Long-term debt, total	4,435,211	4,446,170
Liabilities related to real estate investments held-for-sale	2,919	807
Construction payables and amounts due subcontractors, including retentions	78,376	84,679
Accrued real estate taxes	104,144	74,565
Accrued interest	36,439	59,215
Other accrued expenses	40,567	104,719
Other liabilities	130,537	121,097
Tenant security deposits and prepaid rents	45,702	42,731
Total Liabilities	4,873,895	4,933,983
Equity
Preferred shares	447,683	625,638
Common shares	3,253	2,794
Additional paid-in capital	4,601,224	3,953,497
Accumulated other comprehensive income	3,780	2,691
Distributions in excess of net income	(2,076,299)	(1,993,206)
Total shareholders' equity	2,979,641	2,591,414
Noncontrolling interests	33,303	34,704
Total Equity	3,012,944	2,626,118
Total Liabilities and Equity	7,886,839	7,560,101
Subsidiary of Common Parent [Member]
ASSETS
Land and improvements	1,443,643	1,284,081
Buildings and tenant improvements	5,720,356	5,398,886
Construction in progress	197,472	234,918
Investments in and advances to unconsolidated companies	328,660	372,256
Undeveloped land	580,052	614,208
Real estate investment property, at cost, total	8,270,183	7,904,349
Accumulated depreciation	(1,384,219)	(1,296,396)
Net real estate investments	6,885,964	6,607,953
Real estate investments and other assets held-for-sale	57,790	30,937
Cash and cash equivalents	24,112	33,889
Accounts receivable, net of allowance	20,073	22,283
Straight-line rent receivable, net of allowance	124,574	120,303
Receivables on construction contracts, including retentions	28,650	39,754
Deferred financing costs, net of accumulated amortization	38,029	40,083
Deferred leasing and other costs, net of accumulated amortization	498,025	497,827
Escrow deposits and other assets	209,622	167,072
Total Assets	7,886,839	7,560,101
LIABILITIES AND EQUITY
Secured debt	1,158,456	1,167,953
Unsecured debt	3,066,755	2,993,217
Unsecured line of credit	210,000	285,000
Long-term debt, total	4,435,211	4,446,170
Liabilities related to real estate investments held-for-sale	2,919	807
Construction payables and amounts due subcontractors, including retentions	78,376	84,679
Accrued real estate taxes	104,144	74,565
Accrued interest	36,439	59,215
Other accrued expenses	40,772	104,886
Other liabilities	130,537	121,097
Tenant security deposits and prepaid rents	45,702	42,731
Total Liabilities	4,874,100	4,934,150
Equity
Common equity	2,532,146	1,967,091
Preferred equity	447,683	625,638
General Partners' equity	2,979,829	2,592,729
Limited Partners' common equity	19,944	21,383
Accumulated other comprehensive income	3,780	2,691
Total partners' equity	3,003,553	2,616,803
Noncontrolling interests	9,186	9,148
Total Equity	3,012,739	2,625,951
Total Liabilities and Equity	$ 7,886,839	$ 7,560,101

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Variable Interest Entities (Balances Related to Joint Ventures) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013 entities
Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]
Carrying Value of Investment in Unconsolidated Companies	$ 44.6
Maximum Loss Exposure From Investment In Unconsolidated VIEs	44.6
Carrying Value of Guarantee Obligations	(20.3)
Maximum Loss Exposure from Guarantee Obligations	$ (141.9)
Number of Unconsolidated Joint Ventures Considered Variable Interest Entities	3

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Related Party Transactions (Tables)

9 Months Ended

Sep. 30, 2013

Related Party Transactions [Abstract]

Schedule of Fees Earned from Related Parties

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2013		2012		2013		2012
Management fees	$	2,246	$	2,796	$	6,872	$	8,251
Leasing fees	310		622		1,432		2,856
Construction and development fees	681		1,860		3,258		3,615

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Discontinued Operations and Assets Held for Sale (Table Illustration of Discontinued Operations in Income Statement) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Discontinued Operations
Revenues	$ 3,912	$ 9,774	$ 18,419	$ 32,868
Operating Expenses	(1,398)	(3,985)	(6,993)	(12,623)
Depreciation and amortization, discontinued operations	(844)	(4,937)	(6,686)	(15,903)
Operating Income (Loss)	1,670	852	4,740	4,342
Interest Expense	(769)	(2,822)	(4,670)	(9,041)
Income (loss) before gain on sales	901	(1,970)	70	(4,699)
Gains on depreciated property sales on discontinued operations	8,441	1,608	101,052	11,179
Income (loss) from discontinued operations	$ 9,342	$ (362)	$ 101,122	$ 6,480

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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 $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss) attributable to common shareholders/unitholders	$ (6,067)	$ (28,230)	$ 83,470	$ (93,102)
Less: Dividends on Participating Securities	(650)	(680)	(2,024)	(2,388)
Basic Net Income (Loss) Attributable To Common Stockholders	(6,717)	(28,910)	81,446	(95,490)
Noncontrolling Interest in Net Income (Loss) Operating Partnerships, Redeemable	0	0	1,142	0
Diluted Net Income (Loss) Attributable to Common Stockholders	(6,717)	(28,910)	82,588	(95,490)
Weighted average number of common shares/units outstanding	324,895	270,289	320,810	265,153
Weighted Average Limited Partnership Units Outstanding	0	0	4,393	0
Other potential dilutive shares/units	0	0	177	0
Weighted average number of common shares/units and potential dilutive securities	324,895	270,289	325,380	265,153
Subsidiary of Common Parent [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss) attributable to common shareholders/unitholders	(6,159)	(28,689)	84,612	(94,838)
Less: Dividends on Participating Securities	(650)	(680)	(2,024)	(2,388)
Basic Net Income (Loss) Attributable To Common Stockholders	$ (6,809)	$ (29,369)	$ 82,588	$ (97,226)
Weighted average number of common shares/units outstanding	329,283	274,800	325,203	270,095
Other potential dilutive shares/units	0	0	177	0
Weighted average number of common shares/units and potential dilutive securities	329,283	274,800	325,380	270,095

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Indebtedness Unsecured Debt (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Debt Instrument [Line Items]
Proceeds from unsecured debt	$ 500,000	$ 600,000
Repayments of Unsecured Debt	426,462	172,374
Variable Rate UnSecured Debt [Member] [Member]
Debt Instrument [Line Items]
Proceeds from unsecured debt	250,000
Fixed Rate Unsecured Debt [Member]
Debt Instrument [Line Items]
Proceeds from unsecured debt	250,000
Debt Instrument, Estimated Trading Values, Percent of Face Value, Minimum	93.00%
Debt Instrument, Estimated Trading Values, Percent of Face Value, Maximum	124.00%
Debt Instrument, Interest Rate, Stated Percentage	3.625%
Debt Instrument, Interest Rate, Effective Percentage	3.72%
number of unsecured notes repaid	2
Repayments of Unsecured Debt	$ 425,000
Debt Instrument, Covenant Compliance	We were in compliance with all such covenants at September 30, 2013
Fixed Rate Unsecured Debt Repaid [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.68%
Debt Instrument, Interest Rate, Effective Percentage	6.40%
Variable Rate Unsecured Debt [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt Instrument, Description of Variable Rate Basis	LIBOR
Debt Instrument, Basis Spread on Variable Rate	1.35%
Debt Instrument, Interest Rate at Period End	1.54%

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Indebtedness (Unsecured Line of Credit) (Details) (USD $)		9 Months Ended
	Dec. 31, 2012 Line of Credit [Member]	Sep. 30, 2013 Unsecured Line of Credit DRLP [Member]	Sep. 30, 2013 London Interbank Offered Rate (LIBOR) [Member] Unsecured Line of Credit DRLP [Member]
Debt Instrument, Description of Variable Rate Basis			LIBOR
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,250,000,000
Line of Credit Facility, Covenant Compliance		we were in compliance with all covenants under this line of credit.
Current Market Rate Of Unsecured Lines Of Credit		1.48%
Debt Instrument, Basis Spread on Variable Rate			1.25%
Line of Credit Facility, Interest Rate at Period End			1.43%
Borrowing capacity of unsecured line of credit		850,000,000
Maturity date		Dec. 01, 2015
Line of Credit Facility Increase		400,000,000
Line of credit balance	$ 285,000,000	$ 210,000,000

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Indebtedness

9 Months Ended

Sep. 30, 2013

Debt Disclosure [Abstract]

Indebtedness

Indebtedness

All debt is held directly or indirectly by the Partnership. The General Partner does not have any indebtedness, but does guarantee all of the unsecured debt of the Partnership.

The following table summarizes the book value and changes in the fair value of our debt for the nine months ended September 30, 2013 (in thousands):

	Book Value at 12/31/12		Book Value at 9/30/13		Fair Value at 12/31/12		Issuances and Assumptions		Payments/Payoffs			Adjustments to Fair Value			Fair Value at 9/30/13
Fixed rate secured debt	$	1,149,541	$	1,139,262	$	1,251,477	$	103,638	$	(110,946	)	$	(23,801	)	$	1,220,368
Variable rate secured debt	18,412		19,194		18,386		1,933		(1,151		)	27			19,195
Unsecured debt	2,993,217		3,066,755		3,336,386		500,000		(426,462		)	(135,936		)	3,273,988
Unsecured line of credit	285,000		210,000		285,632		—		(75,000		)	403			211,035
Total	$	4,446,170	$	4,435,211	$	4,891,881	$	605,571	$	(613,559	)	$	(159,307	)	$	4,724,586

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 3.50% to 4.90%, depending on the attributes of the specific loans. The current market rates we utilized were internally estimated; therefore, we have concluded that our determination of fair value for our fixed rate secured debt was primarily based upon Level 3 inputs.

During the nine months endedSeptember 30, 2013, we repaid nine secured loans, at their maturity dates, totaling $100.1 million. These loans had a weighted average stated interest rate of 5.66%.

During the nine months endedSeptember 30, 2013, we assumed three secured loans, in conjunction with our acquisition activity, with a total face value of $99.3 million and a fair value of $103.6 million. These assumed loans had a weighted average remaining term at acquisition of 1.8 years and carry a weighted average stated interest rate of 5.59%. We used an estimated market interest rate of 3.00% in determining the fair value of these loans. Between the date of acquisition and the end of the most recent reporting period, interest rates increased, resulting in our estimated market interest rate for these loans increasing to 3.50%.

Unsecured Debt

At September 30, 2013, with the exception of the $250.0 million variable rate term note described below, 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 93.00% to 124.00% of face value.

In March 2013, we issued $250.0 million of unsecured notes that bear interest at 3.625%, have an effective rate of 3.72%, and mature on April 15, 2023.

In May 2013, we issued and fully drew down on a term loan with an aggregate commitment of $250.0 million that bears interest at a variable rate of LIBOR plus 1.35% (equal to 1.54% for outstanding borrowings at September 30, 2013) and matures May 14, 2018.

During the nine months endedSeptember 30, 2013, we repaid two unsecured notes at their maturity dates totaling $425.0 million. These notes had a weighted average effective rate of 6.40% and a weighted average stated rate of 5.68%.

The indentures (and related supplemental indentures) governing our outstanding series of notes also require us to comply with financial ratios and other covenants regarding our operations. We were in compliance with all such covenants at September 30, 2013.

Unsecured Line of Credit

Our unsecured line of credit at September 30, 2013 is described as follows (in thousands):

Description	Maximum Capacity		Maturity Date	Outstanding Balance at September 30, 2013
Unsecured Line of Credit - Partnership	$	850,000	December 2015	$	210,000

The Partnership's unsecured line of credit has an interest rate on borrowings of LIBOR plus 1.25% (equal to 1.43% for outstanding borrowings at September 30, 2013) and a maturity date of December 2015. Subject to certain conditions, the terms also include an option to increase the facility by up to an additional $400.0 million, for a total of up to $1.25 billion.

This line of credit provides us with an option to obtain borrowings from financial institutions that participate in the line at rates that may be lower than the stated interest rate, subject to certain restrictions.

This line of credit contains financial covenants that require us to meet certain financial ratios and defined levels of performance, including those related to fixed charge coverage, unsecured interest expense coverage and debt-to-asset value (with asset value being defined in the Partnership's unsecured line of credit agreement). At September 30, 2013, we were in compliance with all covenants under this line of credit.

To the extent that there are outstanding borrowings, we utilize a discounted cash flow methodology in order to estimate the fair value of our unsecured line of credit. The net present value of the difference between future contractual interest payments and future interest payments based on our estimate of a current market rate represents the difference between the book value and the fair value. Our estimate of a current market rate is based upon the rate, considering current market conditions and our specific credit profile, at which we estimate we could obtain similar borrowings. The current market rate of 1.48% that we utilized was internally estimated; therefore, we have concluded that our determination of fair value for our unsecured line of credit was primarily based upon a Level 3 input.

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Acquisitions and Dispositions (Narrative) (Details) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Gain on Step Acquisition	$ (962,000)	$ 0
Proceeds from land and depreciated property sales, net	330,740,000	112,559,000
Capital distributions from unconsolidated companies	106,306,000	4,890,000
Gains on Depreciated Property Sales Share of Joint Venture	49,000,000
Other Two Thousand Thirteen Acquisitions [Member] [Domain] [Member]
Gain on Step Acquisition	962,000
Business Combination, Acquisition Related Costs	(3,500,000)
Number of real estate properties acquired	15
Weighted average remaining life of property (years)	7 years 7 months 10 days
Medical Office Properties [Member] | Other Two Thousand Thirteen Acquisitions [Member] [Domain] [Member]
Number of real estate properties acquired	1
New Jersey [Member] [Member] | Industrial [Member] | Other Two Thousand Thirteen Acquisitions [Member] [Domain] [Member]
Number of real estate properties acquired	3
Southern California [Member] | Industrial [Member] | Other Two Thousand Thirteen Acquisitions [Member] [Domain] [Member]
Number of real estate properties acquired	3
Central California [Member] | Industrial [Member] | Other Two Thousand Thirteen Acquisitions [Member] [Domain] [Member]
Number of real estate properties acquired	2
Houston, Texas [Member] | Industrial [Member] | Other Two Thousand Thirteen Acquisitions [Member] [Domain] [Member]
Number of real estate properties acquired	1
Kansas City, Missouri [Member] | Industrial [Member] | Other Two Thousand Thirteen Acquisitions [Member] [Domain] [Member]
Number of real estate properties acquired	1
St. Louis, Missouri [Member] | Industrial [Member] | Other Two Thousand Thirteen Acquisitions [Member] [Domain] [Member]
Number of real estate properties acquired	1
Northeast or Central Pennsylvania [Member] [Member] | Industrial [Member] | Other Two Thousand Thirteen Acquisitions [Member] [Domain] [Member]
Number of real estate properties acquired	2
Indianapolis Indiana [Member] | Industrial [Member] | Other Two Thousand Thirteen Acquisitions [Member] [Domain] [Member]
Number of real estate properties acquired	1
Office [Member]
Number of Real Estate Properties Sold	17
Industrial [Member]
Number of Real Estate Properties Sold	1
Proceeds from sale of Property [Member]
Capital distributions from unconsolidated companies	$ 89,500,000

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Segment Reporting (Reportable Segments Consolidated Assets) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Total Assets	$ 7,886,839	$ 7,560,101
Corporate, Non-Segment [Member]
Total Assets	411,119	499,721
Operating Segments [Member]
Total Assets	7,475,720	7,060,380
Operating Segments [Member] | Industrial [Member]
Total Assets	4,293,447	3,836,721
Operating Segments [Member] | Office [Member]
Total Assets	1,672,180	1,683,314
Operating Segments [Member] | Medical Office [Member]
Total Assets	1,270,802	1,202,929
Operating Segments [Member] | All Other Segments [Member]
Total Assets	84,619	175,197
Operating Segments [Member] | Service Operations [Member]
Total Assets	$ 154,672	$ 162,219

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Net Income (Loss) Per Common Share

9 Months Ended

Sep. 30, 2013

Earnings Per Share [Abstract]

Net Income (Loss) Per Common Share

Net Income (Loss) Per Common Share or Common Unit

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

Diluted net income (loss) per common share is computed by dividing the sum of basic net income (loss) attributable to common shareholders and the noncontrolling interest in earnings allocable to Limited Partner Units (to the extent the Limited Partner Units are dilutive) by the sum of the weighted average number of common shares outstanding and, to the extent they are dilutive, Units outstanding and any potential dilutive securities for the period. Diluted net income (loss) per Common Unit is computed by dividing the basic net income (loss) attributable to common unitholders by the sum of the weighted average number of Common Units outstanding and any potential dilutive securities for the period.

The following table reconciles the components of basic and diluted net income (loss) per common share or Common Unit for the three and nine months ended September 30,2013 and 2012, respectively (in thousands): 

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
General Partner
Net income (loss) attributable to common shareholders	$	(6,067	)	$	(28,230	)	$	83,470		$	(93,102	)
Less: Dividends on participating securities	(650		)	(680		)	(2,024		)	(2,388		)
Basic net income (loss) attributable to common shareholders	(6,717		)	(28,910		)	81,446			(95,490		)
Noncontrolling interest in earnings of common unitholders	—			—			1,142			—
Diluted net income (loss) attributable to common shareholders	$	(6,717	)	$	(28,910	)	$	82,588		$	(95,490	)
Weighted average number of common shares outstanding	324,895			270,289			320,810			265,153
Weighted average Limited Partner Units outstanding	—			—			4,393			—
Other potential dilutive shares	—			—			177			—
Weighted average number of common shares and potential dilutive securities	324,895			270,289			325,380			265,153
Partnership
Net income (loss) attributable to common unitholders	$	(6,159	)	$	(28,689	)	$	84,612		$	(94,838	)
Less: Distributions on participating securities	(650		)	(680		)	(2,024		)	(2,388		)
Basic and diluted net income (loss) attributable to common unitholders	$	(6,809	)	$	(29,369	)	$	82,588		$	(97,226	)
Weighted average number of Common Units outstanding	329,283			274,800			325,203			270,095
Other potential dilutive units	—			—			177			—
Weighted average number of Common Units and potential dilutive securities	329,283			274,800			325,380			270,095

The Limited Partner Units are anti-dilutive to the General Partner for the three months endedSeptember 30,2013 and the three and nine months ended September 30,2012 as a result of the net loss for those periods. In addition, substantially all potential shares related to our stock-based compensation plans are anti-dilutive for all periods presented. The following table summarizes the data that is excluded from the computation of net income (loss) per common share or Common Unit as a result of being anti-dilutive (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013		2012
General Partner
Noncontrolling interest in loss of common unitholders	$	(92	)	$	(459	)	$	—	$	(1,736	)
Weighted average Limited Partner Units outstanding	4,388			4,511			—		4,942
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	1,373			1,763			1,373		1,763
Outstanding participating securities	3,866			4,045			3,866		4,045

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Acquisitions and Dispositions

9 Months Ended

Sep. 30, 2013

Business Combinations [Abstract]

Acquisitions and Dispositions

Acquisitions and Dispositions

2013 Acquisitions

We acquired 15 operating properties during the nine months ended September 30, 2013. These acquisitions consisted of three industrial properties in Central and Southern New Jersey, three industrial properties in Southern California, two industrial properties in Central California, one industrial property in Houston, Texas, one industrial property near Kansas City, Missouri, one industrial property near St. Louis, Missouri, two industrial properties in Northeast and Central Pennsylvania, one industrial property near Indianapolis, Indiana and one medical office property in Central Florida. The following table summarizes the fair value of amounts recognized for each major class of asset and liability (in thousands) for these acquisitions:

Real estate assets	$	422,538
Lease related intangible assets	58,826
Total acquired assets	481,364
Secured debt	103,638
Below market lease liability	1,469
Other liabilities	1,448
Total assumed liabilities	106,555
Fair value of acquired net assets	$	374,809

The leases in the acquired properties had a weighted average remaining life at acquisition of approximately 7.6 years.

Fair Value Measurements

The fair value estimates used in allocating the aggregate purchase price of each acquisition among the individual components of real estate assets and liabilities were determined primarily through calculating the "as-if vacant" value of each building, using the income approach, and relied significantly upon internally determined assumptions. We have determined these estimates to have been primarily based upon Level 3 inputs, which are unobservable inputs based on our own assumptions. The range of most significant assumptions utilized in making the lease-up and future disposition estimates used in calculating the "as-if vacant" value of each building acquired during the nine months ended September 30, 2013 were as follows:

	Low		High
Discount rate	6.60	%	9.67	%
Exit capitalization rate	5.10	%	7.67	%
Lease-up period (months)	12		24
Net rental rate per square foot – Industrial	$2.95		$8.28
Net rental rate per square foot – Medical Office	$18.00		$18.00

Acquisition-Related Activity

The acquisition-related activity in our Consolidated Statements of Operations and Comprehensive Income for the nine months ended September 30, 2013 and 2012 consisted of transaction costs related to completed acquisitions, which are expensed as incurred, as well as gains or losses related to acquisitions where we had a pre-existing non-controlling ownership interest. We recognized a gain of $962,000 on the pre-existing ownership interest that we held in one of the industrial properties we acquired and expenses of $3.5 million for transaction costs during the nine months ended September 30, 2013.

Activity during the nine months endedSeptember 30, 2012 consisted of transaction costs related to acquisitions, which were expensed as incurred.

Dispositions

We disposed of certain consolidated income-producing real estate assets and undeveloped land and received net cash proceeds of $330.7 million and $112.6 million during the nine months ended September 30, 2013 and 2012, respectively.

During the nine months endedSeptember 30, 2013, 17 office properties and one industrial property were sold from certain of our unconsolidated joint ventures for which our capital distributions totaled $89.5 million. Our share of gains from joint venture property sales, which are included in equity in earnings, related almost entirely to these sales and totaled $49.0 million.

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Consolidated Statement of Changes in Equity (Parenthetical) (USD $)	9 Months Ended
	Sep. 30, 2013
Distributions to common shareholders, per share	$ 0.51
Subsidiary of Common Parent [Member]
Distributions to Partners, per Common Unit	$ 0.51

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Subsequent Events (Details) (Declaration of Dividends [Member], USD $)	9 Months Ended	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2013 Common Stock [Member]	Sep. 30, 2013 Series J Preferred Stock [Member]	Sep. 30, 2013 Series K Preferred Stock [Member]	Sep. 30, 2013 Series L Preferred Stock [Member]
Subsequent Event [Line Items]
Common stock dividends declared per share		$ 0.17
Preferred stock dividends declared per share			$ 0.414063	$ 0.406250	$ 0.412500
Record date		Nov. 14, 2013	Nov. 14, 2013	Nov. 14, 2013	Nov. 14, 2013
Payment date		Nov. 29, 2013	Nov. 29, 2013	Nov. 29, 2013	Nov. 29, 2013
Declared date	Oct. 30, 2013

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Indebtedness (Summary of Book Value and Changes in Fair Value of Debt) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Book value	$ 4,435,211	$ 4,446,170
Fair value	4,724,586	4,891,881
Issuances and assumptions	605,571
Payments/Payoffs	(613,559)
Adjustments to fair value	(159,307)
Fixed Rate Secured Debt [Member]
Book value	1,139,262	1,149,541
Fair value	1,220,368	1,251,477
Issuances and assumptions	103,638
Payments/Payoffs	(110,946)
Adjustments to fair value	(23,801)
Variable Rate Secured Debt [Member]
Book value	19,194	18,412
Fair value	19,195	18,386
Issuances and assumptions	1,933
Payments/Payoffs	(1,151)
Adjustments to fair value	27
Unsecured Debt [Member]
Book value	3,066,755	2,993,217
Fair value	3,273,988	3,336,386
Issuances and assumptions	500,000
Payments/Payoffs	(426,462)
Adjustments to fair value	(135,936)
Line of Credit [Member]
Book value	210,000	285,000
Fair value	211,035	285,632
Issuances and assumptions	0
Payments/Payoffs	(75,000)
Adjustments to fair value	$ 403

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Subsequent Events

9 Months Ended

Sep. 30, 2013

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

Declaration of Dividends/Distributions

The General Partner's board of directors declared the following dividends/distributions at its regularly scheduled board meeting held on October 30, 2013:

Class of stock/units	Quarterly Amount per Share or Unit	Record Date	Payment Date
Common	$0.17	November 14, 2013	November 29, 2013
Preferred (per depositary share or unit):
Series J	$0.414063	November 14, 2013	November 29, 2013
Series K	$0.406250	November 14, 2013	November 29, 2013
Series L	$0.412500	November 14, 2013	November 29, 2013

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Related Party Transactions

9 Months Ended

Sep. 30, 2013

Related Party Transactions [Abstract]

Related Party Transactions

Related Party Transactions

We provide property management, asset management, leasing, construction and other tenant-related services to unconsolidated companies in which we have equity interests. We recorded the corresponding fees based on contractual terms that approximate market rates for these types of services and have eliminated our ownership percentage of these fees in the consolidated financial statements. The following table summarizes the fees earned from these companies, prior to elimination, for the three and nine months ended September 30,2013 and 2012, respectively (in thousands): 

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2013		2012		2013		2012
Management fees	$	2,246	$	2,796	$	6,872	$	8,251
Leasing fees	310		622		1,432		2,856
Construction and development fees	681		1,860		3,258		3,615

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Indebtedness (Tables)

9 Months Ended

Sep. 30, 2013

Debt Disclosure [Abstract]

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

	Book Value at 12/31/12		Book Value at 9/30/13		Fair Value at 12/31/12		Issuances and Assumptions		Payments/Payoffs			Adjustments to Fair Value			Fair Value at 9/30/13
Fixed rate secured debt	$	1,149,541	$	1,139,262	$	1,251,477	$	103,638	$	(110,946	)	$	(23,801	)	$	1,220,368
Variable rate secured debt	18,412		19,194		18,386		1,933		(1,151		)	27			19,195
Unsecured debt	2,993,217		3,066,755		3,336,386		500,000		(426,462		)	(135,936		)	3,273,988
Unsecured line of credit	285,000		210,000		285,632		—		(75,000		)	403			211,035
Total	$	4,446,170	$	4,435,211	$	4,891,881	$	605,571	$	(613,559	)	$	(159,307	)	$	4,724,586

Unsecured Line of Credit

Description	Maximum Capacity		Maturity Date	Outstanding Balance at September 30, 2013
Unsecured Line of Credit - Partnership	$	850,000	December 2015	$	210,000

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Variable Interest Entities (Tables)

9 Months Ended

Sep. 30, 2013

Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]

Balances Related to Joint Ventures

	Carrying Value			Maximum Loss Exposure
Investment in unconsolidated companies	$	44.6		$	44.6
Guarantee obligations (1)	$	(20.3	)	$	(141.9	)

(1) We are party to guarantees of the third-party debt of these joint ventures, and our maximum loss exposure is equal to the maximum monetary obligation pursuant to the guarantee agreements. We have also recorded a liability for our probable future obligation under a guarantee to the lender of one of these ventures, which is included within the carrying value of our guarantee obligations. Pursuant to an agreement with the lender, we may make partner loans to this joint venture that will reduce our maximum guarantee obligation on a dollar-for-dollar basis. The carrying value of our recorded guarantee obligations is included in other liabilities in our Consolidated Balance Sheets.

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Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Nov. 01, 2013
Entity Information [Line Items]
Entity Registrant Name	DUKE REALTY CORP
Entity Central Index Key	0000783280
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		325,790,455
Subsidiary of Common Parent [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

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Acquisitions and Dispositions (Tables)

9 Months Ended

Sep. 30, 2013

Summary of Significant Assumptions Utilized in Estimates

	Low		High
Discount rate	6.60	%	9.67	%
Exit capitalization rate	5.10	%	7.67	%
Lease-up period (months)	12		24
Net rental rate per square foot – Industrial	$2.95		$8.28
Net rental rate per square foot – Medical Office	$18.00		$18.00

Other Two Thousand Thirteen Acquisitions [Member] [Domain] [Member]

Summary of Allocation of Fair Value of Amounts Recognized

Real estate assets	$	422,538
Lease related intangible assets	58,826
Total acquired assets	481,364
Secured debt	103,638
Below market lease liability	1,469
Other liabilities	1,448
Total assumed liabilities	106,555
Fair value of acquired net assets	$	374,809