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, 2012

OR

¨ 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   ¨ Duke Realty Limited Partnership Yes x  No   ¨

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 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  ¨ Duke Realty Limited Partnership Yes x No  ¨

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 definition 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  ¨ No  x Duke Realty Limited Partnership Yes  ¨ 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 2, 2012
Common Stock, $.01 par value per share	275,025,508

EXPLANATORY NOTE

This report combines the quarterly reports on Form 10-Q for the period ended September 30, 2012 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 98.4% of the common partnership interests of the Partnership (“General Partner Units”) as of September 30, 2012. The remaining 1.6% 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, 2012 (Unaudited) and December 31, 2011	3
		Consolidated Statements of Operations and Comprehensive Income (Unaudited) -Three and Nine Months Ended September 30, 2012 and 2011	4
		Consolidated Statements of Cash Flows (Unaudited) - Nine Months Ended September 30, 2012 and 2011	5
		Consolidated Statement of Changes in Equity (Unaudited) - Nine Months Ended September 30, 2012	6
	Duke Realty Limited Partnership:
		Consolidated Balance Sheets - September 30, 2012 (Unaudited) and December 31, 2011	7
		Consolidated Statements of Operations and Comprehensive Income (Unaudited) -Three and Nine Months ended September 30, 2012 and 2011	8
		Consolidated Statements of Cash Flows (Unaudited) - Nine Months Ended September 30, 2012 and 2011	9
		Consolidated Statement of Changes in Equity (Unaudited) - Nine Months Ended September 30, 2012	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	40
Item 4.		Controls and Procedures	41
Part II - Other Information
Item 1.		Legal Proceedings	42
Item 1A.		Risk Factors	42
Item 2.		Unregistered Sales of Equity Securities and Use of Proceeds	42
Item 3.		Defaults Upon Senior Securities	43
Item 4.		Mine Safety Disclosures	43
Item 5.		Other Information	43
Item 6.		Exhibits	44

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, 2012			December 31, 2011
	(Unaudited)
ASSETS
Real estate investments:
Land and improvements	$	1,239,276		$	1,202,872
Buildings and tenant improvements	5,016,464			4,766,793
Construction in progress	219,931			44,259
Investments in and advances to unconsolidated companies	367,221			364,859
Undeveloped land	613,183			622,635
	7,456,075			7,001,418
Accumulated depreciation	(1,246,853		)	(1,108,650		)
Net real estate investments	6,209,222			5,892,768
Real estate investments and other assets held-for-sale	—			55,580
Cash and cash equivalents	113,152			213,809
Accounts receivable, net of allowance of $3,080 and $3,597	29,737			22,255
Straight-line rent receivable, net of allowance of $5,274 and $7,447	117,016			105,900
Receivables on construction contracts, including retentions	36,413			40,247
Deferred financing costs, net of accumulated amortization of $45,233 and $59,109	42,095			42,268
Deferred leasing and other costs, net of accumulated amortization of $356,776 and $292,334	465,588			460,881
Escrow deposits and other assets	176,894			170,729
	$	7,190,117		$	7,004,437
LIABILITIES AND EQUITY
Indebtedness:
Secured debt	$	1,096,455		$	1,173,233
Unsecured notes	3,043,690			2,616,063
Unsecured lines of credit	—			20,293
	4,140,145			3,809,589
Liabilities related to real estate investments held-for-sale	—			975
Construction payables and amounts due subcontractors, including retentions	80,934			55,775
Accrued real estate taxes	102,646			69,272
Accrued interest	36,666			58,904
Other accrued expenses	41,661			60,174
Other liabilities	122,776			131,735
Tenant security deposits and prepaid rents	40,248			38,355
Total liabilities	4,565,076			4,224,779
Shareholders’ equity:
Preferred shares ($.01 par value); 5,000 shares authorized; 2,503 and 3,176 shares issued and outstanding	625,638			793,910
Common shares ($.01 par value); 400,000 shares authorized; 273,519 and 252,927 shares issued and outstanding	2,735			2,529
Additional paid-in capital	3,871,155			3,594,588
Accumulated other comprehensive income	2,177			987
Distributions in excess of net income	(1,912,802		)	(1,677,328		)
Total shareholders’ equity	2,588,903			2,714,686
Noncontrolling interests	36,138			64,972
Total equity	2,625,041			2,779,658
	$	7,190,117		$	7,004,437

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
	2012			2011			2012			2011
Revenues:
Rental and related revenue	$	208,957		$	184,581		$	616,451		$	554,752
General contractor and service fee revenue	93,932			127,708			226,507			409,617
	302,889			312,289			842,958			964,369
Expenses:
Rental expenses	39,659			35,105			111,477			108,224
Real estate taxes	28,676			26,355			85,255			79,866
General contractor and other services expenses	87,719			120,547			209,519			379,180
Depreciation and amortization	95,117			81,068			279,136			242,043
	251,171			263,075			685,387			809,313
Other operating activities:
Equity in earnings of unconsolidated companies	2,280			3,104			4,056			5,890
Gain on sale of properties	403			(1,437		)	245			66,910
Undeveloped land carrying costs	(2,140		)	(2,259		)	(6,606		)	(7,021		)
Other operating expenses	(130		)	(60		)	(591		)	(171		)
General and administrative expenses	(8,934		)	(9,493		)	(32,367		)	(29,231		)
	(8,521		)	(10,145		)	(35,263		)	36,377
Operating income	43,197			39,069			122,308			191,433
Other income (expenses):
Interest and other income, net	150			172			394			543
Interest expense	(61,539		)	(54,528		)	(183,623		)	(161,765		)
Acquisition-related activity	(954		)	(342		)	(2,563		)	(1,525		)
Income (loss) from continuing operations before income taxes	(19,146		)	(15,629		)	(63,484		)	28,686
Income tax benefit	103			194			103			194
Income (loss) from continuing operations	(19,043		)	(15,435		)	(63,381		)	28,880
Discontinued operations:
Loss before gain on sales	(114		)	(1,522		)	(1,185		)	(9,223		)
Gain on sale of depreciable properties	1,608			2,088			11,179			16,405
Income from discontinued operations	1,494			566			9,994			7,182
Net income (loss)	(17,549		)	(14,869		)	(53,387		)	36,062
Dividends on preferred shares	(11,081		)	(14,399		)	(35,356		)	(46,347		)
Adjustments for redemption/repurchase of preferred shares	—			(3,633		)	(5,730		)	(3,796		)
Net loss attributable to noncontrolling interests	400			825			1,371			532
Net loss attributable to common shareholders	$	(28,230	)	$	(32,076	)	$	(93,102	)	$	(13,549	)
Basic net income (loss) per common share:
Continuing operations attributable to common shareholders	$	(0.11	)	$	(0.13	)	$	(0.40	)	$	(0.09	)
Discontinued operations attributable to common shareholders	—			—			0.04			0.03
Total	$	(0.11	)	$	(0.13	)	$	(0.36	)	$	(0.06	)
Diluted net income (loss) per common share:
Continuing operations attributable to common shareholders	$	(0.11	)	$	(0.13	)	$	(0.40	)	$	(0.09	)
Discontinued operations attributable to common shareholders	—			—			0.04			0.03
Total	$	(0.11	)	$	(0.13	)	$	(0.36	)	$	(0.06	)
Weighted average number of common shares outstanding	270,289			252,802			265,153			252,618
Weighted average number of common shares and potential dilutive securities	270,289			252,802			265,153			252,618
Comprehensive income (loss):
Net income (loss)	$	(17,549	)	$	(14,869	)	$	(53,387	)	$	36,062
Other comprehensive income:
Derivative instrument activity	410			437			1,190			1,925
Other comprehensive income	410			437			1,190			1,925
Comprehensive income (loss)	$	(17,139	)	$	(14,432	)	$	(52,197	)	$	37,987

See accompanying Notes to Consolidated Financial Statements

4

DUKE REALTY CORPORATION AND SUBSIDIARIES

Consolidated Statements of Cash Flows

For the nine months ended September 30,

(in thousands)

(Unaudited)

	2012			2011
Cash flows from operating activities:
Net income (loss)	$	(53,387	)	$	36,062
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	193,479			204,134
Amortization of deferred leasing and other costs	86,859			88,295
Amortization of deferred financing costs	9,878			11,070
Straight-line rent adjustment	(15,725		)	(19,012		)
Earnings from land and depreciated property sales	(11,424		)	(83,315		)
Third-party construction contracts, net	(4,295		)	(18,417		)
Other accrued revenues and expenses, net	(14,621		)	14,586
Operating distributions received in excess of equity in earnings from unconsolidated companies	10,772			11,681
Net cash provided by operating activities	201,536			245,084
Cash flows from investing activities:
Development of real estate investments	(176,340		)	(125,676		)
Acquisition of real estate investments and related intangible assets	(321,099		)	(179,047		)
Acquisition of undeveloped land	(37,166		)	(3,825		)
Second generation tenant improvements, leasing costs and building improvements	(46,682		)	(71,732		)
Other deferred leasing costs	(22,727		)	(20,950		)
Other assets	674			(4,500		)
Proceeds from land and depreciated property sales, net	112,559			504,688
Capital distributions from unconsolidated companies	4,890			54,730
Capital contributions and advances to unconsolidated companies, net	(19,262		)	(28,362		)
Net cash provided by (used for) investing activities	(505,153		)	125,326
Cash flows from financing activities:
Proceeds from issuance of common shares, net	236,301			—
Payments for redemption/repurchase of preferred shares	(168,272		)	(110,726		)
Proceeds from unsecured debt issuance	600,000			—
Payments on and repurchases of unsecured debt	(172,374		)	(166,346		)
Proceeds from secured debt financings	13,305			—
Payments on secured indebtedness including principal amortization	(107,240		)	(24,841		)
Borrowings (payments) on lines of credit, net	(20,293		)	111,247
Distributions to common shareholders	(135,083		)	(128,817		)
Distributions to preferred shareholders	(31,630		)	(46,347		)
Contributions from (distributions to) noncontrolling interests, net	2,788			(3,952		)
Buyout of noncontrolling interests	(6,208		)	—
Deferred financing costs	(8,334		)	(2,830		)
Net cash provided by (used for) financing activities	202,960			(372,612		)
Net decrease in cash and cash equivalents	(100,657		)	(2,202		)
Cash and cash equivalents at beginning of period	213,809			18,384
Cash and cash equivalents at end of period	$	113,152		$	16,182
Non-cash investing and financing activities:
Assumption of indebtedness and other liabilities in real estate acquisitions	$	19,992		$	150,042
Contribution of properties to unconsolidated companies	$	—		$	53,245
Investments and advances related to acquisition of previously unconsolidated companies	$	—		$	5,987
Conversion of Limited Partner Units to common shares	$	29,002		$	3,052
Issuance of Limited Partner Units for acquisition	$	—		$	28,357
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 ended September 30,2012

(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, 2011	$	793,910		$	2,529	$	3,594,588	$	987	$	(1,677,328	)	$	64,972		$	2,779,658
Net loss	—			—		—		—		(52,016		)	(1,371		)	(53,387		)
Other comprehensive income	—			—		—		1,190		—			—			1,190
Issuance of common shares	—			169		235,660		—		—			—			235,829
Stock based compensation plan activity	—			13		6,199		—		(2,330		)	—			3,882
Conversion of Limited Partner Units	—			24		28,978		—		—			(29,002		)	—
Distributions to preferred shareholders	—			—		—		—		(35,356		)	—			(35,356		)
Redemption of preferred shares	(168,272		)	—		5,730		—		(5,730		)	—			(168,272		)
Distributions to common shareholders ($0.51 per share)	—			—		—		—		(135,083		)	—			(135,083		)
Contributions from noncontrolling interests, net	—			—		—		—		—			2,788			2,788
Buyout of noncontrolling interests	—			—		—		—		(4,959		)	(1,249		)	(6,208		)
Balance at September 30, 2012	$	625,638		$	2,735	$	3,871,155	$	2,177	$	(1,912,802	)	$	36,138		$	2,625,041

See accompanying Notes to Consolidated Financial Statements

6

DUKE REALTY LIMITED PARTNERSHIP AND SUBSIDIARIES

Consolidated Balance Sheets

(in thousands)

	September 30, 2012			December 31, 2011
	(Unaudited)
ASSETS
Real estate investments:
Land and improvements	$	1,239,276		$	1,202,872
Buildings and tenant improvements	5,016,464			4,766,793
Construction in progress	219,931			44,259
Investments in and advances to unconsolidated companies	367,221			364,859
Undeveloped land	613,183			622,635
	7,456,075			7,001,418
Accumulated depreciation	(1,246,853		)	(1,108,650		)
Net real estate investments	6,209,222			5,892,768
Real estate investments and other assets held-for-sale	—			55,580
Cash and cash equivalents	113,152			213,826
Accounts receivable, net of allowance of $3,080 and $3,597	29,737			22,255
Straight-line rent receivable, net of allowance of $5,274 and $7,447	117,016			105,900
Receivables on construction contracts, including retentions	36,413			40,247
Deferred financing costs, net of accumulated amortization of $45,233 and $59,109	42,095			42,268
Deferred leasing and other costs, net of accumulated amortization of $356,776 and $292,334	465,588			460,881
Escrow deposits and other assets	176,894			170,257
	$	7,190,117		$	7,003,982
LIABILITIES AND EQUITY
Indebtedness:
Secured debt	$	1,096,455		$	1,173,233
Unsecured notes	3,043,690			2,616,063
Unsecured lines of credit	—			20,293
	4,140,145			3,809,589
Liabilities related to real estate investments held-for-sale	—			975
Construction payables and amounts due subcontractors, including retentions	80,934			55,775
Accrued real estate taxes	102,646			69,272
Accrued interest	36,666			58,904
Other accrued expenses	41,768			59,795
Other liabilities	122,776			131,735
Tenant security deposits and prepaid rents	40,248			38,355
Total liabilities	4,565,183			4,224,400
Partners’ equity:
General Partner:
Common equity (273,519 and 252,927 General Partner Units issued and outstanding)	1,965,154			1,923,886
Preferred equity (2,503 and 3,176 Preferred Units issued and outstanding)	625,638			793,910
	2,590,792			2,717,796
Limited Partners' common equity (4,511 and 6,945 Limited Partner Units issued and outstanding)	22,993			56,254
Accumulated other comprehensive income	2,177			987
Total partners’ equity	2,615,962			2,775,037
Noncontrolling interests	8,972			4,545
Total equity	2,624,934			2,779,582
	$	7,190,117		$	7,003,982

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
	2012			2011			2012			2011
Revenues:
Rental and related revenue	$	208,957		$	184,581		$	616,451		$	554,752
General contractor and service fee revenue	93,932			127,708			226,507			409,617
	302,889			312,289			842,958			964,369
Expenses:
Rental expenses	39,659			35,105			111,477			108,224
Real estate taxes	28,676			26,355			85,255			79,866
General contractor and other services expenses	87,719			120,547			209,519			379,180
Depreciation and amortization	95,117			81,068			279,136			242,043
	251,171			263,075			685,387			809,313
Other operating activities:
Equity in earnings of unconsolidated companies	2,280			3,104			4,056			5,890
Gain on sale of properties	403			(1,437		)	245			66,910
Undeveloped land carrying costs	(2,140		)	(2,259		)	(6,606		)	(7,021		)
Other operating expenses	(130		)	(60		)	(591		)	(171		)
General and administrative expense	(8,934		)	(9,493		)	(32,367		)	(29,231		)
	(8,521		)	(10,145		)	(35,263		)	36,377
Operating income	43,197			39,069			122,308			191,433
Other income (expenses):
Interest and other income, net	150			172			394			543
Interest expense	(61,539		)	(54,528		)	(183,623		)	(161,765		)
Acquisition-related activity	(954		)	(342		)	(2,563		)	(1,525		)
Income (loss) from continuing operations before income taxes	(19,146		)	(15,629		)	(63,484		)	28,686
Income tax benefit	103			194			103			194
Income (loss) from continuing operations	(19,043		)	(15,435		)	(63,381		)	28,880
Discontinued operations:
Loss before gain on sales	(114		)	(1,522		)	(1,185		)	(9,223		)
Gain on sale of depreciable properties	1,608			2,088			11,179			16,405
Income from discontinued operations	1,494			566			9,994			7,182
Net income (loss)	(17,549		)	(14,869		)	(53,387		)	36,062
Distributions on Preferred Units	(11,081		)	(14,399		)	(35,356		)	(46,347		)
Adjustments for redemption/repurchase of Preferred Units	—			(3,633		)	(5,730		)	(3,796		)
Net (income) loss attributable to noncontrolling interests	(59		)	(43		)	(365		)	163
Net loss attributable to common unitholders	$	(28,689	)	$	(32,944	)	$	(94,838	)	$	(13,918	)
Basic net income (loss) per Common Unit:
Continuing operations attributable to common unitholders	$	(0.11	)	$	(0.13	)	$	(0.40	)	$	(0.09	)
Discontinued operations attributable to common unitholders	—			—			0.04			0.03
Total	$	(0.11	)	$	(0.13	)	$	(0.36	)	$	(0.06	)
Diluted net income (loss) per Common Unit:
Continuing operations attributable to common unitholders	$	(0.11	)	$	(0.13	)	$	(0.40	)	$	(0.09	)
Discontinued operations attributable to common unitholders	—			—			0.04			0.03
Total	$	(0.11	)	$	(0.13	)	$	(0.36	)	$	(0.06	)
Weighted average number of Common Units outstanding	274,800			259,866			270,095			259,505
Weighted average number of Common Units and potential dilutive securities	274,800			259,866			270,095			259,505
Comprehensive income (loss):
Net income (loss)	$	(17,549	)	$	(14,869	)	$	(53,387	)	$	36,062
Other comprehensive income:
Derivative instrument activity	410			437			1,190			1,925
Other comprehensive income	410			437			1,190			1,925
Comprehensive income (loss)	$	(17,139	)	$	(14,432	)	$	(52,197	)	$	37,987

See accompanying Notes to Consolidated Financial Statements

8

DUKE REALTY LIMITED PARTNERSHIP AND SUBSIDIARIES

Consolidated Statements of Cash Flows

For the nine months ended September 30,

(in thousands)

(Unaudited)

	2012			2011
Cash flows from operating activities:
Net income (loss)	$	(53,387	)	$	36,062
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	193,479			204,134
Amortization of deferred leasing and other costs	86,859			88,295
Amortization of deferred financing costs	9,878			11,070
Straight-line rent adjustment	(15,725		)	(19,012		)
Earnings from land and depreciated property sales	(11,424		)	(83,315		)
Third-party construction contracts, net	(4,295		)	(18,417		)
Other accrued revenues and expenses, net	(14,582		)	14,588
Operating distributions received in excess of equity in earnings from unconsolidated companies	10,772			11,681
Net cash provided by operating activities	201,575			245,086
Cash flows from investing activities:
Development of real estate investments	(176,340		)	(125,676		)
Acquisition of real estate investments and related intangible assets	(321,099		)	(179,047		)
Acquisition of undeveloped land	(37,166		)	(3,825		)
Second generation tenant improvements, leasing costs and building improvements	(46,682		)	(71,732		)
Other deferred leasing costs	(22,727		)	(20,950		)
Other assets	674			(4,500		)
Proceeds from land and depreciated property sales, net	112,559			504,688
Capital distributions from unconsolidated companies	4,890			54,730
Capital contributions and advances to unconsolidated companies, net	(19,262		)	(28,362		)
Net cash provided by (used for) investing activities	(505,153		)	125,326
Cash flows from financing activities:
Contributions from the General Partner	236,301			—
Payments for redemption/repurchase of Preferred Units	(168,272		)	(110,726		)
Proceeds from unsecured debt issuance	600,000			—
Payments on and repurchases of unsecured debt	(172,374		)	(166,346		)
Proceeds from secured debt financings	13,305			—
Payments on secured indebtedness including principal amortization	(107,240		)	(24,841		)
Borrowings (payments) on lines of credit, net	(20,293		)	111,247
Distributions to common unitholders	(137,662		)	(132,423		)
Distributions to preferred unitholders	(31,630		)	(46,347		)
Contributions from (distributions to) noncontrolling interests, net	5,311			(408		)
Buyout of noncontrolling interests	(6,208		)	—
Deferred financing costs	(8,334		)	(2,830		)
Net cash provided by (used for) financing activities	202,904			(372,674		)
Net decrease in cash and cash equivalents	(100,674		)	(2,262		)
Cash and cash equivalents at beginning of period	213,826			18,419
Cash and cash equivalents at end of period	$	113,152		$	16,157
Non-cash investing and financing activities:
Assumption of indebtedness and other liabilities in real estate acquisitions	$	19,992		$	150,042
Contribution of properties to unconsolidated companies	$	—		$	53,245
Investments and advances related to acquisition of previously unconsolidated companies	$	—		$	5,987
Conversion of Limited Partner Units to common shares of the General Partner	$	29,002		$	3,052
Issuance of Limited Partner Units for acquisition	$	—		$	28,357
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 ended September 30,2012

(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, 2011	$	1,923,886		$	793,910		$	56,254		$	987	$	2,775,037		$	4,545		$	2,779,582
Net loss	(87,372		)	35,356			(1,736		)	—		(53,752		)	365			(53,387		)
Other comprehensive income	—			—			—			1,190		1,190			—			1,190
Capital contribution from the General Partner	235,829			—			—			—		235,829			—			235,829
Stock based compensation plan activity	3,907			—			—			—		3,907			—			3,907
Conversion of Limited Partner Units to common shares of the General Partner	29,002			—			(29,002		)	—		—			—			—
Distributions to Preferred Unitholders	—			(35,356		)	—			—		(35,356		)	—			(35,356		)
Redemption of Preferred Units	—			(168,272		)	—			—		(168,272		)	—			(168,272		)
Distributions to Partners ($0.51 per Common Unit)	(135,139		)	—			(2,523		)	—		(137,662		)	—			(137,662		)
Contributions from noncontrolling interests, net	—			—			—			—		—			5,311			5,311
Buyout of noncontrolling interests	(4,959		)	—			—			—		(4,959		)	(1,249		)	(6,208		)
Balance at September 30, 2012	$	1,965,154		$	625,638		$	22,993		$	2,177	$	2,615,962		$	8,972		$	2,624,934

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 2011 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 Annual Reports on Form 10-K of the General Partner and the Partnership, respectively, for the year ended December 31, 2011, 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 Annual Reports on Form 10-K of the General Partner and the Partnership, respectively, for the year ended December 31, 2011.

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.

The General Partner is the sole general partner of the Partnership, owning approximately 98.4% of the common partnership interests of the Partnership (“General Partner Units”) at September 30, 2012. The remaining 1.6% 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 9) are conducted through the Partnership. We conduct our Service Operations (see Note 9) through Duke Realty Services, LLC, Duke Realty Services Limited Partnership and Duke Construction Limited Partnership (“DCLP”), which are consolidated entities that are 100% owned by a combination of the General Partner and the Partnership. DCLP is owned through a taxable REIT subsidiary. The consolidated financial statements include our accounts and the accounts of our majority-owned or controlled subsidiaries.

2.    Reclassifications

Certain amounts in the accompanying consolidated financial statements for 2011 have been reclassified to conform to the 2012 consolidated financial statement presentation.

3.    Variable Interest Entities

During the third quarter of 2012, an unconsolidated venture that was previously determined to be a VIE sold its sole property, retired its outstanding debt and distributed substantially all of its remaining assets.

During the second quarter of 2012, an event took place within one of our unconsolidated joint ventures that required us to re-evaluate our previous conclusions that this joint venture was not a variable interest entity (“VIE”). Upon such reconsideration, we determined that the fair value of the total equity investment at risk was not sufficient to meet the overall capital requirements of the joint venture, and we therefore concluded that this venture now meets the applicable criteria to be considered a VIE. However, for the reasons described below, we have determined there is no individual primary beneficiary for this joint venture.

After the aforementioned reconsideration events, there are three unconsolidated joint ventures at September 30, 2012 that we have determined meet the criteria to be considered 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 as of September 30, 2012 (in millions):

	Carrying Value			Maximum Loss Exposure
Investment in Unconsolidated Companies	$	55.1		$	55.1
Guarantee Obligations (1)	$	(24.3	)	$	(145.8	)

(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.

12

4.    Acquisitions and Dispositions

2012 Acquisitions

We acquired 18 operating properties during the nine months ended September 30, 2012. These acquisitions consisted of two industrial properties near Chicago, Illinois, two industrial properties in Columbus, Ohio, one industrial property in Southern California, one industrial property in Atlanta, Georgia and twelve medical office properties in various markets. The following table summarizes our allocation of the fair value of amounts recognized for each major class of asset and liability (in thousands) for these acquisitions:

Real estate assets	$	292,754
Lease related intangible assets	50,468
Other assets	2,829
Total acquired assets	346,051
Secured debt	18,741
Other liabilities	1,251
Total assumed liabilities	19,992
Fair value of acquired net assets	$	326,059

On September 28, 2012 we acquired a seven-building medical office portfolio for $90.1 million. The initial accounting for this acquisition is incomplete as of September 30, 2012 and the summary above includes a provisional allocation of $69.2 million to real estate assets and $20.9 million to lease related intangible assets. The measurement period adjustments required to finalize the accounting for this acquisition will have little or no impact related to the three or nine months ended September 30, 2012 on the Consolidated Statement of Operations, when considering the timing of the acquisition.

The leases in the acquired properties had a weighted average remaining life at acquisition of approximately 11.1 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, 2012 were as follows:

	Low		High
Discount rate	7.19	%	8.78	%
Exit capitalization rate	5.75	%	7.40	%
Lease-up period (months)	9		19
Net rental rate per square foot – Industrial	$2.75		$7.62
Net rental rate per square foot – Medical Office	$16.00		$26.14

Acquisition-Related Activity

The acquisition-related activity in our consolidated Statements of Operations for the nine months ended September 30, 2012 and 2011 consists of transaction costs related to completed acquisitions, which are expensed as incurred.

13

Dispositions

We disposed of income-producing real estate assets and undeveloped land and received net cash proceeds of $112.6 million and $504.7 million during the nine months ended September 30, 2012 and 2011, respectively.

5.    Indebtedness

All debt is held directly or indirectly by the Partnership. The General Partner itself does not have any indebtedness, but does guarantee 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, 2012 (in thousands):

	Book Value at 12/31/11		Book Value at 9/30/12		Fair Value at 12/31/11		Issuances and Assumptions		Payments/Payoffs			Adjustments to Fair Value		Fair Value at 9/30/12
Fixed rate secured debt	$	1,167,188	$	1,077,991	$	1,256,331	$	18,741	$	(106,355	)	$	6,147	$	1,174,864
Variable rate secured debt	6,045		18,464		6,045		13,305		(885		)	499		18,964
Unsecured notes	2,616,063		3,043,690		2,834,610		600,000		(172,374		)	150,385		3,412,621
Unsecured lines of credit	20,293		—		20,244		—		(20,293		)	49		—
Total	$	3,809,589	$	4,140,145	$	4,117,230	$	632,046	$	(299,907	)	$	157,080	$	4,606,449

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 3.10% to 5.30%, depending on the attributes of the specific loans. The current market rates we utilized were internally estimated; therefore, we have concluded that our determination of fair value for our fixed rate secured debt was primarily based upon Level 3 inputs.

We assumed one secured loan in conjunction with our acquisition activity in 2012. This assumed loan had a total face value of $18.1 million and fair value of $18.7 million. This assumed loan carries a stated interest rate of 5.14% and a remaining term upon acquisition of 2.2 years. We used an estimated market rate of 3.50% in determining the fair value of this loan.

In June 2012, 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 2.50% (equal to 2.73% for outstanding borrowings as of September 30, 2012) and maturing June 29, 2017.

During the nine months ended September 30, 2012, we repaid four secured loans at their maturity dates totaling $95.8 million. The loans had a weighted average stated interest rate of 6.02%.

Unsecured Notes

In June 2012, we issued $300.0 million of senior unsecured notes that bear interest at 4.375%, have an effective rate of 4.466% and mature on June 15, 2022. In September 2012, we issued an additional $300.0 million of unsecured notes that bear interest at 3.875%, have an effective rate of 3.93%, and mature on October 15, 2022.

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 date. 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.

14

At September 30, 2012, all of our unsecured notes bear interest at fixed rates. 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, as defined. The estimated trading values of our fixed rate unsecured debt, depending on the maturity and coupon rates, ranged from 100.00% to 132.00% of face value.

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 of September 30, 2012.

Unsecured Line of Credit

Our unsecured line of credit as of September 30, 2012 is described as follows (in thousands):

Description	Maximum Capacity		Maturity Date	Outstanding Balance at September 30, 2012
Unsecured Line of Credit - Partnership	$	850,000	December 2015	$	—

The Partnership's unsecured line of credit has an interest rate on borrowings of LIBOR plus 1.25%, 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). As of September 30, 2012, we were in compliance with all covenants under this line of credit.

Through July 2012, a consolidated subsidiary had an unsecured line of credit that allowed for borrowings up to $30.0 million and bore interest at a rate of LIBOR plus 0.85%. This unsecured line of credit was used to fund development activities within the consolidated subsidiary and the outstanding balance of $20.3 million was repaid at its maturity in July 2012.

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.

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

General Partner

In March 2012, we redeemed all of the outstanding shares of our 6.95% Series M Cumulative Redeemable Preferred Shares at their liquidation amount of $168.3 million. Original offering costs of $5.7 million were included as a reduction to net loss attributable to common shareholders in conjunction with the redemption of these shares.

15

In the first nine months of 2012, we issued 16.9 million shares of common stock pursuant to our at the market offerings, generating gross proceeds of approximately $241.5 million and, after considering commissions and other costs, net proceeds of approximately $236.3 million. We paid $4.8 million in commissions related to the sale of these common shares. The proceeds from these offerings were used for acquisitions, general corporate purposes and redemption of preferred shares and fixed rate secured debt.

Partnership

For each share of common stock or preferred stock 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 shares of its common stock or preferred stock, the Partnership redeems the corresponding Common Units or Preferred Units held by the General Partner at the same price.

7.    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 we 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, 2012 and 2011, respectively (in thousands): 

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2012		2011		2012		2011
Management fees	$	2,796	$	2,770	$	8,251	$	7,393
Leasing fees	622		826		2,856		3,627
Construction and development fees	1,860		1,786		3,615		4,182

8.    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 30,2012 and 2011, respectively (in thousands): 

16

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
General Partner
Net loss attributable to common shareholders	$	(28,230	)	$	(32,076	)	$	(93,102	)	$	(13,549	)
Less: Dividends on participating securities	(680		)	(811		)	(2,388		)	(2,416		)
Basic net loss attributable to common shareholders	(28,910		)	(32,887		)	(95,490		)	(15,965		)
Noncontrolling interest in earnings of common unitholders	—			—			—			—
Diluted net loss attributable to common shareholders	$	(28,910	)	$	(32,887	)	$	(95,490	)	$	(15,965	)
Weighted average number of common shares outstanding	270,289			252,802			265,153			252,618
Weighted average Limited Partner Units outstanding	—			—			—			—
Other potential dilutive shares	—			—			—			—
Weighted average number of common shares and potential dilutive securities	270,289			252,802			265,153			252,618
Partnership
Net loss attributable to common unitholders	$	(28,689	)	$	(32,944	)	$	(94,838	)	$	(13,918	)
Less: Distributions on participating securities	(680		)	(811		)	(2,388		)	(2,416		)
Basic and diluted net loss attributable to common unitholders	$	(29,369	)	$	(33,755	)	$	(97,226	)	$	(16,334	)
Weighted average number of Common Units outstanding	274,800			259,866			270,095			259,505
Other potential dilutive units	—			—			—			—
Weighted average number of Common Units and potential dilutive securities	274,800			259,866			270,095			259,505

The Limited Partner Units are anti-dilutive to the General Partner for the three and nine months ended September 30, 2012 and 2011, as a result of the net loss for these periods. In addition, substantially all potential shares related to our stock-based compensation plans were anti-dilutive for all periods presented and potential shares related to our 3.75% Exchangeable Senior Notes (“Exchangeable Notes”), which were repaid in December 2011, were anti-dilutive for the three and nine months ended September 30,2011. 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,
	2012			2011			2012			2011
General Partner
Noncontrolling interest in loss of common unitholders	$	(459	)	$	(868	)	$	(1,736	)	$	(369	)
Weighted average Limited Partner Units outstanding	4,511			7,064			4,942			6,887
General Partner and the Partnership
Other potential dilutive shares or units:
Anti-dilutive outstanding potential shares or units under fixed stock option and other stock-based compensation plans	1,763			1,677			1,763			1,677
Anti-dilutive potential shares or units under the Exchangeable Notes	—			3,432			—			3,432
Outstanding participating securities	4,045			4,840			4,045			4,840

9.    Segment Reporting

We have four reportable operating segments at September 30, 2012, 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.

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During 2012, one of the quantitative thresholds was triggered, which required our medical office property operating segment to be presented as a separate reportable segment. As such, our medical office properties are presented as a separate reportable segment for the three and nine months ended September 30, 2012, as well as for the comparative prior periods.

Other revenue consists of other operating revenues not identified with one of our operating segments. Interest expense and other non-property specific revenues and expenses are not allocated to individual segments in determining our performance measure.

We assess and measure our overall operating results based upon an industry performance measure referred to as Funds From Operations (“FFO”), which management believes is a useful indicator of our 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.

We do not allocate certain income and expenses (“Non-Segment Items”, as shown in the table below) to our operating segments. 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, 2012 and 2011, respectively (in thousands): 

	Three Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
Revenues
Rental Operations:
Industrial	$	109,400	$	95,676	$	327,713	$	281,083
Office	67,701		66,157		201,606		207,387
Medical Office	23,007		14,292		64,669		41,280
Non-reportable Rental Operations	4,695		5,485		16,067		16,783
General contractor and service fee revenue (“Service Operations”)	93,932		127,708		226,507		409,617
Total Segment Revenues	298,735		309,318		836,562		956,150

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Other Revenue	4,154			2,971			6,396			8,219
Consolidated Revenue from continuing operations	302,889			312,289			842,958			964,369
Discontinued Operations	143			50,315			2,987			151,373
Consolidated Revenue	$	303,032		$	362,604		$	845,945		$	1,115,742
Reconciliation of Funds From Operations
Net earnings excluding depreciation and Non-Segment Items
Industrial	$	81,165		$	70,214		$	244,651		$	203,854
Office	38,302			38,271			117,367			120,999
Medical Office	14,851			8,797			42,344			25,121
Non-reportable Rental Operations	3,026			3,905			11,238			12,232
Service Operations	6,213			7,161			16,988			30,437
	143,557			128,348			432,588			392,643
Non-Segment Items:
Interest expense	(61,539		)	(54,528		)	(183,623		)	(161,765		)
Interest and other income	150			172			394			543
Other operating expenses	(130		)	(60		)	(591		)	(171		)
General and administrative expenses	(8,934		)	(9,493		)	(32,367		)	(29,231		)
Undeveloped land carrying costs	(2,140		)	(2,259		)	(6,606		)	(7,021		)
Acquisition-related activity	(954		)	(342		)	(2,563		)	(1,525		)
Income tax benefit	103			194			103			194
Other non-segment income	3,278			1,934			4,119			4,456
Net (income) loss attributable to noncontrolling interests - consolidated entities not wholly owned by the Partnership	(59		)	(43		)	(365		)	163
Joint venture items	8,997			11,635			27,999			30,597
Dividends on preferred shares/Preferred Units	(11,081		)	(14,399		)	(35,356		)	(46,347		)
Adjustments for redemption/repurchase of preferred shares/Preferred Units	—			(3,633		)	(5,730		)	(3,796		)
Discontinued operations	(92		)	14,745			17			41,163
FFO of Partnership attributable to common unitholders	71,156			72,271			198,019			219,903
Net loss attributable to noncontrolling interests - common limited partnership interests in the Partnership	459			868			1,736			369
Noncontrolling interest share of FFO adjustments	(1,638		)	(2,835		)	(5,358		)	(6,206		)
FFO of General Partner attributable to common shareholders	69,977			70,304			194,397			214,066
Depreciation and amortization on continuing operations	(95,117		)	(81,068		)	(279,136		)	(242,043		)
Depreciation and amortization on discontinued operations	(22		)	(16,267		)	(1,202		)	(50,386		)
Company’s share of joint venture adjustments	(8,782		)	(8,531		)	(26,008		)	(24,798		)
Earnings from depreciated property sales on continuing operations	403			(1,437		)	245			66,910
Earnings from depreciated property sales on discontinued operations	1,608			2,088			11,179			16,405
Earnings from depreciated property sales - share of joint venture	2,065			—			2,065			91
Noncontrolling interest share of FFO adjustments	1,638			2,835			5,358			6,206
Net loss of General Partner attributable to common shareholders	$	(28,230	)	$	(32,076	)	$	(93,102	)	$	(13,549	)
Add back: Net loss attributable to noncontrolling interests - common limited partnership interests in the Partnership	(459		)	(868		)	(1,736		)	(369		)
Net loss of Partnership attributable to common unitholders	$	(28,689	)	$	(32,944	)	$	(94,838	)	$	(13,918	)

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The assets for each of the reportable segments as of September 30, 2012 and December 31, 2011 are as follows (in thousands):

	September 30, 2012		December 31, 2011
Assets
Rental Operations:
Industrial	$	3,753,022	$	3,586,250
Office	1,676,389		1,742,196
Medical Office	820,898		580,177
Non-reportable Rental Operations	180,998		209,056
Service Operations	161,953		167,382
Total Segment Assets	6,593,260		6,285,061
Non-Segment Assets - Partnership	596,857		718,921
Consolidated Assets - Partnership	$	7,190,117	$	7,003,982
Non-Segment Assets - General Partner	—		455
Consolidated Assets - General Partner	$	7,190,117	$	7,004,437

10.    Discontinued Operations and Assets Held for Sale

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

	Sold in 2012	Sold in 2011	Total
Office	9	93	102
Industrial	11	7	18
Retail	1	1	2
	21	101	122

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, 2012 and 2011, respectively (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
Revenues	$	143		$	50,315		$	2,987		$	151,373
Operating expenses	(140		)	(22,912		)	(1,826		)	(70,599		)
Depreciation and amortization	(22		)	(16,267		)	(1,202		)	(50,386		)
Operating income (loss)	(19		)	11,136			(41		)	30,388
Interest expense	(95		)	(12,658		)	(1,144		)	(39,611		)
Loss before gain on sales	(114		)	(1,522		)	(1,185		)	(9,223		)
Gain on sale of depreciable properties	1,608			2,088			11,179			16,405
Income from discontinued operations	$	1,494		$	566		$	9,994		$	7,182

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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. While a portion of the income or loss attributable to noncontrolling interests is allocable to discontinued operations for the General Partner, the income (loss) from discontinued operations for all periods presented in the Partnership's Consolidated Statements of Operations and Comprehensive Income is entirely attributable to the common unitholders.

The following table illustrates the allocation of the income (loss) of the General Partner attributable to common shareholders between continuing operations and discontinued operations, reflecting the above-noted allocation of income or loss attributable to noncontrolling interests between continuing and discontinued operations, for the three and nine months ended September 30, 2012 and 2011, respectively (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
Loss from continuing operations attributable to common shareholders	$	(29,700	)	$	(32,626	)	$	(102,913	)	$	(20,541	)
Income from discontinued operations attributable to common shareholders	1,470			550			9,811			6,992
Net loss attributable to common shareholders	$	(28,230	)	$	(32,076	)	$	(93,102	)	$	(13,549	)

11.    Subsequent Events

Declaration of Dividends/Distributions

The General Partner's board of directors declared the following dividends/distributions at its regularly scheduled board meeting held on October 30, 2012:

Class of stock/units	Quarterly Amount per Share or Unit	Record Date	Payment Date
Common	$0.17	November 14, 2012	November 30, 2012
Preferred (per depositary share or unit):
Series J	$0.414063	November 14, 2012	November 30, 2012
Series K	$0.406250	November 14, 2012	November 30, 2012
Series L	$0.412500	November 14, 2012	November 30, 2012
Series O	$0.523437	December 17, 2012	December 31, 2012

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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 Annual Reports on Form 10-K for the year ended December 31, 2011, as filed with the Securities and Exchange Commission (the “SEC”) on February 24, 2012 and March 2, 2012 for Duke Realty Corporation (the “General Partner”) and Duke Realty Limited Partnership (the “Partnership”), respectively. 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, climate change 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 Annual Reports on Form 10-K for the fiscal year ended December 31, 2011, which we filed with the SEC on February 24, 2012 and March 2, 2012 for the General Partner and Partnership, respectively. The risk factors contained in our Annual Reports 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 through a related entity in 1972 and is the sole general partner of the Partnership, which is a limited partnership formed under the laws of the State of Indiana in 1993. 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 2011 Annual Reports on Form 10-K.

As of September 30, 2012, we:

• Owned or jointly controlled 759 industrial, office, medical office and other properties, of which 741 properties with approximately 137.3 million square feet are in service and 18 properties with more than 4.7 million square feet are under development. The 741 in-service properties are comprised of 616 consolidated properties with more than 112.0 million square feet and 125 jointly controlled unconsolidated properties with more than 25.2 million square feet. The 18 properties under development consist of 15 consolidated properties with approximately 3.5 million square feet and three jointly controlled unconsolidated properties with more than 1.2 million square feet.

• Owned, including through ownership interests in unconsolidated joint ventures, approximately 4,650 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, expand our medical office portfolio nationally to take advantage of demographic trends and to reduce our investment in suburban office properties and other non-strategic assets.

We have four reportable operating segments at September 30, 2012, 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.

During 2012, one of the quantitative thresholds was triggered, which required our medical office property operating segment to be presented as a separate reportable segment. As such, our medical office properties are presented as a separate reportable segment for the three and nine months ended September 30,2012, as well as for the comparative prior periods.

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 for 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, as of September 30, 2012 and 2011, respectively (in thousands, except percentage data):

	Total Square Feet		Percent of Total Square Feet				Percent Leased*				Average Annual Net Effective Rent**
Type	2012	2011	2012		2011		2012		2011		2012	2011
Industrial	91,993	86,518	82.1	%	74.7	%	94.0	%	93.0	%	$3.78	$3.89
Office	15,635	26,286	13.9	%	22.7	%	84.1	%	84.6	%	$13.33	$13.24
Medical Office	3,677	2,139	3.3	%	1.9	%	91.5	%	85.8	%	$21.20	$21.29
Other	739	847	0.7	%	0.7	%	89.4	%	87.5	%	$24.12	$24.24
Total	112,044	115,790	100.0	%	100.0	%	92.5	%	90.9	%	$5.69	$6.32
*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, acquisitions of highly leased industrial and medical office properties as well as significant dispositions of office properties, drove the overall increase in our total percent leased from September 30,2011. Since September 30, 2011, we have disposed of office properties with 10.7 million rentable square feet in aggregate. As we had no continuing involvement in these properties, the prior period revenue and expenses related to these properties have been classified within discontinued operations. Furthermore, the decrease in total average annual net effective rent noted in the table above is a result of this overall shift in product mix.

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 space that had been previously under lease is referred to as second generation lease activity. Our total leasing activity for our consolidated rental properties, expressed in the number of rentable square feet of leases signed during the period, is as follows for the three and nine months ended September 30,2012 and 2011, respectively (in thousands):

	Three Months Ended September 30,		Nine Months Ended September 30,
	2012	2011	2012	2011
New Leasing Activity - First Generation	902	1,472	4,058	3,179
New Leasing Activity - Second Generation	1,074	1,198	4,153	5,060
Renewal Leasing Activity	5,083	2,179	9,089	7,184
Total Leasing Activity	7,059	4,849	17,300	15,423

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 30,2012 and 2011, respectively (square feet data in thousands):

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	Square Feet of New Second Generation Leases		Average Term in Years		Estimated Tenant Improvement Cost per Square Foot		Leasing Commissions per Square Foot
	2012	2011	2012	2011	2012	2011	2012	2011
Three Months
Industrial	817	733	5.5	4.7	$4.70	$2.30	$1.86	$1.63
Office	253	463	5.9	6.1	$18.71	$17.41	$6.96	$7.91
Medical Office	4	2	5.8	3.3	$20.00	$2.50	$7.93	$2.53
Total	1,074	1,198	5.6	5.3	$8.05	$8.13	$3.08	$4.06
Nine Months
Industrial	3,343	3,724	7.1	4.8	$2.61	$2.30	$1.50	$1.27
Office	783	1,329	6.6	5.8	$15.98	$14.17	$7.35	$6.54
Medical Office	27	7	7.1	4.1	$13.20	$10.04	$6.12	$4.47
Total	4,153	5,060	7.0	5.0	$5.20	$5.43	$2.63	$2.66

Lease Renewals

The following table summarizes our lease renewal activity within our consolidated rental properties for the three and nine months ended September 30,2012 and 2011, 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
	2012	2011	2012		2011		2012	2011	2012		2011		2012		2011		2012		2011
Three Months
Industrial	4,907	1,522	93.8	%	78.2	%	6.5	3.3	0.2	%	(0.5	)%	$	0.41	$	0.51	$	0.90	$	0.73
Office	169	643	47.9	%	66.8	%	2.4	4.0	8.2	%	0.7	%	$	2.42	$	5.00	$	1.78	$	4.46
Medical Office	7	12	48.4	%	59.8	%	2.8	5.1	5.3	%	5.3	%	$	4.43	$	1.22	$	1.15	$	2.43
Other	—	2	—	%	100.0	%	—	5.0	—	%	5.7	%	$	—	$	—	$	—	$	5.55
Total	5,083	2,179	90.8	%	74.3	%	6.4	3.5	1.0	%	0.3	%	$	0.48	$	1.84	$	0.93	$	1.85
Nine Months
Industrial	8,007	5,620	84.2	%	63.1	%	5.8	4.1	0.5	%	(7.6	)%	$	0.40	$	0.87	$	0.93	$	0.78
Office	1,057	1,539	70.7	%	68.2	%	4.1	4.4	2.5	%	(1.7	)%	$	3.27	$	4.06	$	3.06	$	4.07
Medical Office	25	17	43.4	%	56.5	%	6.7	4.4	6.3	%	7.3	%	$	1.70	$	1.47	$	1.13	$	2.15
Other	—	8	—	%	81.2	%	—	4.6	—	%	(0.7	)%	$	—	$	—	$	—	$	2.26
Total	9,089	7,184	82.2	%	64.1	%	5.6	4.1	1.2	%	(4.7	)%	$	0.74	$	1.56	$	1.18	$	1.49
* 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.

We renewed several significant industrial leases, across multiple markets, which drove the renewal percentage above 90% for the three months ended September 30, 2012.

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 at favorable rates. 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 as of September 30, 2012 (in thousands, except percentage data):

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	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 2012	1,863		$	10,666	2	%	1,520		$	6,404	309		$	3,811	31		$	425	3		$	26
2013	13,998		71,522		12	%	12,232		47,231		1,694		23,074		44		633		28		584
2014	12,542		66,638		11	%	10,730		41,960		1,661		22,118		143		2,352		8		208
2015	11,710		61,596		10	%	9,938		39,393		1,725		21,264		27		461		20		478
2016	11,515		58,361		10	%	9,861		36,581		1,550		19,694		81		1,592		23		494
2017	10,557		61,698		10	%	8,875		36,494		1,361		17,961		187		3,938		134		3,305
2018	7,563		55,801		9	%	5,442		22,244		1,550		20,784		375		7,769		196		5,004
2019	7,807		44,301		8	%	6,459		23,142		1,075		14,478		198		4,330		75		2,351
2020	7,616		45,290		8	%	6,456		25,444		759		11,716		361		7,259		40		871
2021	5,588		34,882		6	%	4,574		18,411		655		7,933		328		7,831		31		707
2022 and Thereafter	12,901		78,928		14	%	10,405		29,931		805		12,347		1,589		34,737		102		1,913
Total Leased	103,660		$	589,683	100	%	86,492		$	327,235	13,144		$	175,180	3,364		$	71,327	660		$	15,941
Total Portfolio Square Feet	112,044						91,993				15,635				3,677				739
Percent Leased	92.5	%					94.0	%			84.1	%			91.5	%			89.4	%
* 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. Because of this, 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 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(s) 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. Because of the numerous factors considered in our acquisition decisions, we do not establish specific target yields for future acquisitions.

We acquired 18 properties during the nine months ended September 30, 2012 and 59 properties, in addition to other real estate-related assets, during the year ended December 31, 2011. 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 2012 Acquisitions						Full Year 2011 Acquisitions
Type	Acquisition Price*		In-Place Yield**		Percent Leased at Acquisition Date***		Acquisition Price*		In-Place Yield**		Percent Leased at Acquisition Date***
Industrial	$	184,782	6.4	%	95.3	%	$	516,251	6.6	%	92.7	%
Office	—		—	%	—	%	90,603		5.1	%	66.8	%
Medical Office	158,441		7.1	%	100.0	%	143,241		7.3	%	98.1	%
Total	$	343,223	6.7	%	96.0	%	$	750,095	6.5	%	91.5	%
* Includes real estate assets and net acquired lease-related intangible assets 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 sold 21 buildings during the nine months ended September 30, 2012 and 119 buildings during the year ended December 31, 2011. The following table summarizes the sales prices, in-place yields and percent leased, by product type, of these building sales (in thousands, except percentage data):

	Year-to-Date 2012 Dispositions						Full Year 2011 Dispositions
Type	Sales Price		In-Place Yield*		Percent Leased**		Sales Price		In-Place Yield*		Percent Leased**
Industrial	$	41,188	7.0	%	78.7	%	$	82,903	6.0	%	69.4	%
Office	54,281		7.0	%	78.5	%	1,546,094		8.4	%	85.7	%
Other	11,400		9.0	%	80.5	%	—		—	%	—	%
Total	$	106,869	7.2	%	78.7	%	$	1,628,997	8.2	%	83.5	%
*   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.

Development

At September 30, 2012, we had 4.7 million square feet of property under development with total estimated costs upon completion of $537.5 million compared to 1.3 million square feet with total estimated costs upon completion of $237.4 million at September 30, 2011. The square footage and estimated costs include both consolidated and joint venture development activity at 100%.

The following table summarizes our properties under development as of September 30, 2012 (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	3,498	83%	$	413,289	$	204,047	$	209,242
Joint venture properties	1,250	52%	124,180		45,769		78,411
Total	4,748	75%	$	537,469	$	249,816	$	287,653

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Funds From Operations

We assess and measure our overall operating results based upon an industry performance measure referred to as Funds From Operations (“FFO”), which management believes is a useful indicator of our 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 30,2012 and 2011, respectively (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
Net loss of General Partner attributable to common shareholders	$	(28,230	)	$	(32,076	)	$	(93,102	)	$	(13,549	)
Add back: Net loss attributable to noncontrolling interests - common limited partnership interests in the Partnership	(459		)	(868		)	(1,736		)	(369		)
Net loss of Partnership attributable to common unitholders	(28,689		)	(32,944		)	(94,838		)	(13,918		)
Adjustments:
Depreciation and amortization	95,139			97,335			280,338			292,429
Company share of joint venture depreciation and amortization	8,782			8,531			26,008			24,798
Earnings from depreciable property sales—wholly owned	(2,011		)	(651		)	(11,424		)	(83,315		)
Earnings from depreciable property sales—share of joint venture	(2,065		)	—			(2,065		)	(91		)
Funds From Operations of Partnership attributable to common unitholders	$	71,156		$	72,271		$	198,019		$	219,903
Additional General Partner Adjustments:
Net loss attributable to noncontrolling interests - common limited partnership interests in the Partnership	459			868			1,736			369
Noncontrolling interest share of adjustments	(1,638		)	(2,835		)	(5,358		)	(6,206		)
Funds From Operations of General Partner attributable to common shareholders	$	69,977		$	70,304		$	194,397		$	214,066

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Results of Operations

A summary of our operating results and property statistics for the three and nine months ended September 30,2012 and 2011, 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,
	2012			2011			2012			2011
Rental and related revenue	$	208,957		$	184,581		$	616,451		$	554,752
General contractor and service fee revenue	93,932			127,708			226,507			409,617
Operating income	43,197			39,069			122,308			191,433
General Partner
Net loss attributable to common shareholders	$	(28,230	)	$	(32,076	)	$	(93,102	)	$	(13,549	)
Weighted average common shares outstanding	270,289			252,802			265,153			252,618
Weighted average common shares and potential dilutive securities	270,289			252,802			265,153			252,618
Partnership
Net loss attributable to common unitholders	$	(28,689	)	$	(32,944	)	$	(94,838	)	$	(13,918	)
Weighted average Common Units outstanding	274,800			259,866			270,095			259,505
Weighted average Common Units and potential dilutive securities	274,800			259,866			270,095			259,505
General Partner and the Partnership
Basic income (loss) per common share or Common Unit:
Continuing operations	$	(0.11	)	$	(0.13	)	$	(0.40	)	$	(0.09	)
Discontinued operations	$	—		$	—		$	0.04		$	0.03
Diluted income (loss) per common share or Common Unit:
Continuing operations	$	(0.11	)	$	(0.13	)	$	(0.40	)	$	(0.09	)
Discontinued operations	$	—		$	—		$	0.04		$	0.03
Number of in-service consolidated properties at end of period	616			672			616			672
In-service consolidated square footage at end of period	112,044			115,790			112,044			115,790
Number of in-service joint venture properties at end of period	125			127			125			127
In-service joint venture square footage at end of period	25,238			25,481			25,238			25,481

Comparison of Three Months Ended September 30, 2012 to Three Months Ended September 30, 2011

Rental and Related Revenue

The following table sets forth rental and related revenue from continuing operations by reportable segment, as well as total rental and related revenue from discontinued operations, for the three months ended September 30, 2012 and 2011, respectively (in thousands):

	Three Months Ended September 30,
	2012		2011
Rental and Related Revenue:
Industrial	$	109,400	$	95,676
Office	67,701		66,157
Medical Office	23,007		14,292
Other	8,849		8,456
Total Rental and Related Revenue from Continuing Operations	$	208,957	$	184,581
Rental and Related Revenue from Discontinued Operations	143		50,315
Total Rental and Related Revenue from Continuing and Discontinued Operations	$	209,100	$	234,896

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

• We acquired 77 properties, of which 47 were industrial and 23 were medical office, and placed nine developments in service from January 1, 2011 to September 30, 2012, which provided incremental revenues of $21.2 million in the third quarter of 2012, as compared to the same period in 2011.

• The remaining increase in rental and related revenue from continuing operations is primarily due to improved results within the properties that have been in service for all of 2011 and the first nine months of 2012. Improved occupancy was the main driver of the overall improvement within these properties, as rental rates remained fairly flat.

Rental Expenses and Real Estate Taxes

The following table sets forth rental expenses and real estate taxes from continuing operations by reportable segment, as well as total rental expenses and real estate taxes from discontinued operations, for the three months ended September 30, 2012 and 2011, respectively (in thousands):

	Three Months Ended September 30,
	2012		2011
Rental Expenses:
Industrial	$	11,783	$	9,925
Office	20,737		19,386
Medical Office	5,619		4,241
Other	1,520		1,553
Total Rental Expenses from Continuing Operations	$	39,659	$	35,105
Rental Expenses from Discontinued Operations	103		15,269
Total Rental Expenses from Continuing and Discontinued Operations	$	39,762	$	50,374
Real Estate Taxes:
Industrial	$	16,452	$	15,537
Office	8,662		8,500
Medical Office	2,537		1,254
Other	1,025		1,064
Total Real Estate Tax Expense from Continuing Operations	$	28,676	$	26,355
Real Estate Tax Expense from Discontinued Operations	37		7,643
Total Real Estate Tax Expense from Continuing and Discontinued Operations	$	28,713	$	33,998

Overall, rental expenses from continuing operations increased by $4.6 million in the third quarter of 2012, compared to the same period in 2011. This increase was primarily a result of the additional 77 properties acquired and nine developments placed in service since January 1, 2011, which resulted in incremental rental expenses of $2.5 million.

Overall, real estate taxes from continuing operations increased by $2.3 million in the third quarter of 2012, compared to the same period in 2011. We recognized incremental real estate tax expense of $2.6 million associated with the additional 77 properties acquired and nine developments placed in service since January 1, 2011.

Service Operations

The following table sets forth the components of the Service Operations reportable segment for the three months ended September 30, 2012 and 2011, respectively (in thousands):

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	Three Months Ended September 30,
	2012			2011
Service Operations:
General contractor and service fee revenue	$	93,932		$	127,708
General contractor and other services expenses	(87,719		)	(120,547		)
Total	$	6,213		$	7,161

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. A significant decrease in third-party construction volume in the third quarter of 2012 compared to the third quarter of 2011, due to some significant third-party construction jobs being completed, drove the decrease in our earnings from Service Operations.

Depreciation and Amortization

Depreciation and amortization expense increased from $81.1 million during the third quarter of 2011 to $95.1 million for the same period in 2012, primarily due to depreciation related to additions to our continuing operations asset base from properties acquired and developments placed in service in 2011 and 2012.

Gain on Sale of Properties

During the third quarter of 2011, we determined it to be necessary to complete a roof replacement at our expense, pursuant to contractual obligations on a property that we had sold during a prior period to a 20%-owned unconsolidated joint venture, and we accordingly accrued the cost of replacement and recognized a $1.4 million adjustment to reduce the original gain on the sale. Prior to the third quarter of 2011, we had employed other, less costly, repair measures and our best estimates did not indicate that the replacement of the roof was necessary.

General and Administrative Expense

General and administrative expenses decreased from $9.5 million for the third quarter of 2011 to $8.9 million for the same period in 2012. 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 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 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. 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.

Total indirect operating costs, prior to any allocation or absorption, and general corporate expenses are collectively referred to as our overall pool of overhead costs. Our overall pool of overhead costs decreased by $5.8 million between the third quarters of 2011 and 2012, largely as the result of headcount reductions that took place during December 2011. The reduction in overhead costs was partially offset by a decrease in overhead costs allocated and expensed to third-party construction activities, due to the substantial completion of some significant third-party construction jobs, as well as decreased overhead cost allocation to other functions, such as maintenance and property management, due to the significant disposition activity that took place during the fourth quarter of 2011.

We allocated and expensed $3.8 million of overhead costs to third-party construction activities during the three months ended September 30, 2012, compared to $7.2 million for the three months ended September 30, 2011. We

31

capitalized $4.6 million and $5.7 million of our total overhead costs to leasing and development, respectively, for consolidated properties during the three months ended September 30, 2012, compared to capitalizing $6.8 million and $1.9 million of such costs, respectively, for the three months ended September 30, 2011. Combined overhead costs capitalized to leasing and development totaled 28.7% and 21.0% of our overall pool of overhead costs for the three-month periods ended September 30, 2012 and September 30, 2011, respectively.

Interest Expense

Interest expense allocable to continuing operations increased from $54.5 million in the third quarter of 2011 to $61.5 million in the third quarter of 2012. We allocated $12.7 million of interest expense to discontinued operations for the third quarter of 2011, as the result of the significant property dispositions during 2011, compared to allocating only $95,000 of interest expense for the same period in 2012. Total interest expense, combined for continuing and discontinued operations, decreased from $67.2 million in the third quarter of 2011 to $61.6 million in the third quarter of 2012. This overall reduction to total interest expense was primarily a result of carrying lower average borrowings through the third quarter of 2012, compared to the same period in 2011, as well as due to a $2.0 million increase in capitalized interest that resulted from increased development activities.

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 122 buildings are classified as discontinued operations for both the three months ended September 30, 2012 and September 30, 2011. These 122 buildings consist of 102 office, 18 industrial, and two retail properties. As a result, we classified a loss, before gain on sales, of $114,000 and $1.5 million in discontinued operations for the three months ended September 30, 2012 and 2011, respectively.

Of the properties included in discontinued operations, four were sold during the third quarter of 2012 and two were sold during the third quarter of 2011. The gains on disposal of $1.6 million and $2.1 million for the three months ended September 30, 2012 and 2011, respectively, are reported in discontinued operations.

Comparison of Nine Months Ended September 30, 2012 to Nine Months Ended September 30, 2011

Rental and Related Revenue

The following table sets forth rental and related revenue from continuing operations by reportable segment, as well as total rental and related revenue from discontinued operations, for the nine months ended September 30, 2012 and 2011, respectively (in thousands):

	Nine Months Ended September 30,
	2012		2011
Rental and Related Revenue:
Industrial	$	327,713	$	281,083
Office	201,606		207,387
Medical Office	64,669		41,280
Other	22,463		25,002
Total Rental and Related Revenue from Continuing Operations	$	616,451	$	554,752
Rental and Related Revenue from Discontinued Operations	2,987		151,373
Total Rental and Related Revenue from Continuing and Discontinued Operations	$	619,438	$	706,125

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

• We acquired 77 properties, of which 47 were industrial and 23 were medical office, and placed nine developments in service from January 1, 2011 to September 30, 2012, which provided incremental revenues of $63.5 million in the nine months endedSeptember 30, 2012, as compared to the same period in 2011.

• The sale of 13 office properties to an unconsolidated joint venture in late March 2011 resulted in a $10.0 million decrease in rental and related revenue from continuing operations in the nine months endedSeptember 30, 2012, which partially offset the impact of newly acquired or developed properties.

• The remaining increase in rental and related revenue from continuing operations is primarily due to improved results within the properties that have been in service for all of 2011 and the first nine months of 2012. Higher levels of occupancy drove the overall improvement within these properties, as rental rates remained fairly flat.

• The overall shift of revenues and income from office properties to industrial and medical office properties is consistent with our continuing strategy to increase our asset concentration in industrial and medical office properties while reducing our overall investment in office properties.

Rental Expenses and Real Estate Taxes

The following table sets forth rental expenses and real estate taxes from continuing operations by reportable segment, as well as total rental expenses and real estate taxes from discontinued operations, for the nine months ended September 30, 2012 and 2011, respectively (in thousands):

	Nine Months Ended September 30,
	2012		2011
Rental Expenses:
Industrial	$	32,667	$	31,396
Office	58,870		58,613
Medical Office	15,624		12,351
Other	4,316		5,864
Total Rental Expenses from Continuing Operations	$	111,477	$	108,224
Rental Expenses from Discontinued Operations	1,287		47,386
Total Rental Expenses from Continuing and Discontinued Operations	$	112,764	$	155,610
Real Estate Taxes:
Industrial	$	50,395	$	45,833
Office	25,369		27,775
Medical Office	6,701		3,808
Other	2,790		2,450
Total Real Estate Tax Expense from Continuing Operations	$	85,255	$	79,866
Real Estate Tax Expense from Discontinued Operations	539		23,213
Total Real Estate Tax Expense from Continuing and Discontinued Operations	$	85,794	$	103,079

Overall, rental expenses from continuing operations increased by $3.3 million in the nine months ended September 30, 2012, compared to the same period in 2011. While we recognized incremental rental expenses of $6.6 million associated with the additional 77 properties acquired and nine developments placed in service since January 1, 2011, we also sold 13 office properties to an unconsolidated joint venture in late March 2011, which resulted in a $2.8 million decrease in rental expenses in the nine months ended September 30, 2012 as compared to the same period in 2011.

Overall, real estate taxes from continuing operations increased by $5.4 million in the nine months ended September 30, 2012, compared to the same period in 2011. We recognized incremental real estate tax expense of $7.8 million associated with the additional 77 properties acquired and nine developments placed in service since January 1, 2011. This increase was partially offset by a decrease of $1.6 million related to the 13 properties that were sold to a joint venture during the first quarter of 2011.

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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, 2012 and 2011, respectively (in thousands):

	Nine Months Ended September 30,
	2012			2011
Service Operations:
General contractor and service fee revenue	$	226,507		$	409,617
General contractor and other services expenses	(209,519		)	(379,180		)
Total	$	16,988		$	30,437

A significant decrease in third-party construction volume in the first nine months of 2012 compared to the first nine months of 2011, due to some significant third-party construction jobs being completed, drove the decrease in our earnings from Service Operations.

Depreciation and Amortization

Depreciation and amortization expense increased from $242.0 million during the first nine months of 2011 to $279.1 million for the same period in 2012, primarily due to depreciation related to additions to our continuing operations asset base from properties acquired and developments placed in service in 2011 and 2012.

Gain on Sale of Properties

During the nine months ended September 30,2011, we sold 18 properties that did not meet the criteria for inclusion in discontinued operations, recognizing total gains on sale of $66.9 million.

General and Administrative Expense

General and administrative expenses increased from $29.2 million for the first nine months of 2011 to $32.4 million for the same period in 2012.

Our overall pool of overhead expenses decreased by $8.8 million during the nine months ended September 30, 2012 compared to the same period in 2011. The reduction in overhead costs was more than offset by a decrease in overhead costs allocated and expensed to third-party construction activities, due to the substantial completion of some significant third-party construction jobs, as well as decreased overhead cost allocation to other functions, such as maintenance and property management, due to the significant disposition activity that took place during the fourth quarter of 2011.

We allocated and expensed $9.4 million of overhead costs to third-party construction activities during the nine months endedSeptember 30, 2012, compared to $23.2 million for the nine months endedSeptember 30, 2011. We capitalized $24.0 million and $13.8 million of our total overhead costs to leasing and development, respectively, for consolidated properties during the nine months endedSeptember 30, 2012, compared to capitalizing $17.8 million and $8.4 million of such costs, respectively, for the nine months endedSeptember 30, 2011. Combined overhead costs capitalized to leasing and development totaled 31.4% and 20.3% of our overall pool of overhead costs for the nine-month periods ended September 30, 2012 and September 30, 2011, respectively.

Interest Expense

Interest expense allocable to continuing operations increased from $161.8 million in the first nine months of 2011 to $183.6 million in the first nine months of 2012. We had $39.6 million of interest expense allocated to discontinued operations in the first nine months of 2011, as the result of the significant property dispositions during 2011, compared to allocating only $1.1 million of interest expense for the same period in 2012. Total interest expense, combined for continuing and discontinued operations, decreased from $201.4 million in the first nine months of 2011 to $184.8 million in the first nine months of 2012. This overall reduction to interest expense was primarily a

34

result of carrying reduced average borrowings in the first nine months of 2012, compared to the same period in 2011, as well as due to a $2.3 million increase in capitalized interest that resulted from increased development activities.

Discontinued Operations

The operations of 122 buildings are classified as discontinued operations for both the nine months ended September 30, 2012 and September 30, 2011. These 122 buildings consist of 102 office, 18 industrial, and two retail properties. As a result, we classified a loss, before gain on sales, of $1.2 million and $9.2 million in discontinued operations for the nine months ended September 30, 2012 and 2011, respectively.

Of the properties included in discontinued operations, 21 were sold during the first nine months of 2012 and 14 were sold during the first nine months of 2011. The gains on disposal of $11.2 million and $16.4 million for the nine months ended September 30, 2012 and 2011, 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 twelve months, including payments of dividends and distributions as well as the capital expenditures needed to maintain our current real estate assets, primarily through working capital, net cash provided by operating activities and proceeds received from real estate dispositions. We had no outstanding borrowings on the Partnership's $850.0 million unsecured line of credit at September 30, 2012, which allows us significant additional flexibility for temporary financing of either short-term obligations or strategic acquisitions.

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

We are subject to a number of risks as a result of 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, 2012, 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.

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On February 11, 2010, we entered into an at the market equity program that allowed us to issue new shares of our common stock, from time to time, with an aggregate offering price of up to $150.0 million. We fully utilized this program during the first three months of 2012, issuing 10.8 million shares of our common stock, resulting in gross proceeds of $150.0 million. We paid approximately $3.0 million in commissions related to the sales of these common shares and, after considering those commissions and other costs, generated net proceeds of approximately $147.0 million from the offerings.

On May 7, 2012, we entered into a new at the market equity program that allows us to issue new shares of our common stock, from time to time, with an aggregate offering price of up to $200.0 million. Through September 30, 2012, we have issued 6.1 million shares of our common stock under this program, resulting in gross proceeds of approximately $91.5 million. We paid approximately $1.8 million in commissions related to the sales of these common shares and, after considering those commissions and other costs, generated net proceeds of approximately $89.3 million from the offerings.

The indentures (and related supplemental indentures) governing our outstanding series of notes 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, as of September 30, 2012.

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 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 Entities

Transactions with unconsolidated partnerships and joint ventures also provide a source of liquidity. From time to time we will sell properties to unconsolidated entities, while retaining a continuing interest in that entity, and receive proceeds commensurate to those interests that we do not own. Additionally, unconsolidated entities will from time to time obtain debt financing and will distribute to us, and our joint venture partners, all or a portion of the proceeds from such debt financing.

We have a 20% equity interest in an unconsolidated joint venture (“Duke/Hulfish”) which, along with its subsidiary entities, has acquired 35 properties from us since its formation in May 2008. We have received cumulative net sale and financing proceeds of approximately $847.2 million through September 30, 2012. We are party to an agreement that allows Duke/Hulfish a right of first offer to acquire future build-to-suit or speculative developments on certain specified parcels of our undeveloped land.

Uses of Liquidity

Our principal uses of liquidity include the following:

• accretive 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.

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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. Pursuant to this strategy, we evaluate development and acquisition opportunities based upon 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 leasing commissions related to the initial leasing of newly completed or vacant space in acquired properties are referred to as first generation expenditures. Such expenditures are included within development of real estate investments and other deferred leasing costs in our Consolidated Statements of Cash Flows.

Tenant improvements and leasing costs to re-let rental space that had been previously under lease 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 (in thousands):

	Nine Months Ended September 30,
	2012		2011
Second generation tenant improvements	$	19,245	$	34,312
Second generation leasing costs	24,078		31,988
Building improvements	3,359		5,432
Totals	$	46,682	$	71,732

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

	Nine Months Ended September 30,
	2012		2011
Industrial	$	23,544	$	24,642
Office	22,678		46,835
Medical Office	434		144
Non-reportable segments	26		111
Totals	$	46,682	$	71,732

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 three quarters of 2012 and our board of directors declared dividends or distributions of

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$0.17 per common share or Common Unit for the fourth quarter of 2012. Our future dividends or distributions will be declared at the discretion of our board of directors and will be subject to our future capital needs and availability.

At September 30, 2012, we had four series of preferred stock outstanding. The annual dividend rates on our preferred shares range between 6.5% and 8.375% and are paid in arrears quarterly. In March 2012, we redeemed all of our 6.95% Series M Cumulative Redeemable Preferred Shares (“Series M Shares”) for a total payment of $168.3 million, thus reducing our future quarterly dividend commitments by $2.9 million.

Debt Maturities

Debt outstanding at September 30, 2012 had a face value totaling $4.1 billion with a weighted average interest rate of 6.17% and matures at various dates through 2028. Of this total amount, we had $3.0 billion of unsecured debt and $1.1 billion of secured debt outstanding at September 30, 2012. Scheduled principal amortization and maturities of such debt totaled $279.6 million for the nine months ended September 30, 2012.

The following is a summary of the scheduled future amortization and maturities of our indebtedness at September 30, 2012 (in thousands, except percentage data):

	Future Repayments
Year	Scheduled Amortization		Maturities		Total		Weighted Average Interest Rate of Future Repayments
Remainder of 2012	$	4,166	$	50,000	$	54,166	5.50	%
2013	17,067		521,644		538,711		6.27	%
2014	15,940		301,000		316,940		6.15	%
2015	14,378		358,381		372,759		6.80	%
2016	12,377		506,690		519,067		6.11	%
2017	10,100		556,479		566,579		5.90	%
2018	7,937		300,000		307,937		6.08	%
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	%
Thereafter	14,178		50,000		64,178		6.93	%
	$	115,487	$	4,021,679	$	4,137,166	6.17	%

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

We paid $168.3 million in March 2012 to redeem our Series M 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 redeem or repurchase certain of our outstanding series of preferred stock.

Historical Cash Flows

Cash and cash equivalents were $113.2 million and $16.2 million at September 30, 2012 and 2011, 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,
	2012			2011
General Partner
Net Cash Provided by Operating Activities	$	201.5		$	245.1
Net Cash Provided by (Used for) Investing Activities	$	(505.2	)	$	125.3
Net Cash Provided by (Used for) Financing Activities	$	203.0		$	(372.6	)
Partnership
Net Cash Provided by Operating Activities	$	201.6		$	245.1
Net Cash Provided by (Used for) Investing Activities	$	(505.2	)	$	125.3
Net Cash Provided by (Used for) Financing Activities	$	202.9		$	(372.7	)

Operating Activities

The receipt of rental income from Rental Operations continues to be our primary source of operating cash flows. The decrease in cash flows from operations noted in the table above was primarily due to the overall reduction in rental revenues, which was driven by the disposition of a significant portion of our office properties since September 30, 2011. This overall change in product mix correspondingly drove a $25.1 million decrease in cash outflows for second generation capital expenditures (classified within investing activities). The timing of cash receipts also contributed to the decrease in cash flows from operations, as accounts receivable at September 30, 2012 are $7.9 million greater than at September 30, 2011.

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, 2012, we paid cash of $321.1 million for real estate acquisitions and $37.2 million for undeveloped land acquisitions, compared to $179.0 million and $3.8 million, respectively, for real estate and undeveloped land acquisitions in the same period in 2011.

• Real estate development costs increased to $176.3 million for the nine months ended September 30, 2012 from $125.7 million for the same period in 2011.

• Sales of land and depreciated property provided $112.6 million in net proceeds for the nine months ended September 30, 2012, compared to $504.7 million for the same period in 2011.

• For the nine months ended September 30,2012, we received a $4.9 million capital distribution, which represented our share of the net proceeds from the sale of the sole property within one of our unconsolidated joint ventures. For the same period in 2011, we received a $54.7 million capital distribution, which represented our share of the net proceeds from a loan obtained by one of our unconsolidated joint ventures.

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 2012, compared to the same period in 2011:

• In March 2012, we redeemed all of the outstanding shares of our Series M Shares for a total payment of $168.3 million. In July 2011, we redeemed all of the outstanding shares of our 7.25% Series N Cumulative Redeemable Preferred Shares for a total payment of $108.6 million.

• During the nine months ended September 30, 2012, we issued 16.9 million shares of common stock for net proceeds of $236.3 million.

• In June 2012, we issued $300.0 million of senior unsecured notes that bear interest at 4.375% and mature on June 15, 2022. In September 2012, we issued an additional $300.0 million of unsecured notes that bear interest at 3.875% and mature on October 15, 2022.

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• In June 2012, 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.

• 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. In March 2011 and August 2011, we repaid $42.5 million and $122.5 million, respectively, of senior unsecured notes with an effective rate of 6.96% and 5.69%, respectively, at their scheduled maturity dates.

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

• For the nine months ended September 30,2011, we increased net borrowings on the Partnership’s $850.0 million line of credit by $109.0 million, compared to no net change in borrowings for the same period in 2012.

Contractual Obligations

Aside from changes in long-term debt, there have not been material changes in our outstanding commitments since December 31, 2011, as previously discussed in our 2011 Annual Reports 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. We would consolidate a venture that is determined to be a VIE if we were 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 5% of our total assets as of both September 30, 2012 and December 31, 2011. Total assets of our unconsolidated subsidiaries were $2.5 billion and $2.6 billion as of September 30, 2012 and December 31, 2011, respectively. The combined revenues of our unconsolidated subsidiaries totaled $217.2 million and $201.3 million for the nine months ended September 30, 2012 and 2011, respectively.

We have guaranteed the repayment of certain secured and unsecured loans of our unconsolidated subsidiaries and the outstanding balances on the guaranteed portion of these loans totaled $236.9 million at September 30, 2012.

Item 3.    Quantitative and Qualitative Disclosures About Market Risk

We are exposed to interest rate changes primarily as a result of our line of credit and our long-term borrowings. Our interest rate risk management objective is to limit the impact of interest rate changes on earnings and cash flows and to lower overall borrowing costs. To achieve our objectives, we borrow primarily at fixed rates. We do not enter into derivative or interest rate transactions for speculative purposes. We have one outstanding swap, which has a fixed rate on one of our variable rate loans; it is not significant to our Financial Statements in terms of notional amount or fair value at September 30, 2012.

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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 2012			2013			2014			2015			2016			Thereafter			Face Value		Fair Value
Fixed rate secured debt	$	3,611		$	110,529		$	63,563		$	119,870		$	366,021		$	411,419		$	1,075,013	$	1,174,864
Weighted average interest rate	6.06		%	5.84		%	5.56		%	5.38		%	5.86		%	7.07		%
Variable rate secured debt	$	83		$	1,217		$	1,285		$	663		$	676		$	14,539		$	18,463	$	18,964
Weighted average interest rate	3.60		%	1.23		%	1.22		%	2.08		%	2.11		%	2.95		%
Fixed rate unsecured debt	$	50,472		$	426,965		$	252,092		$	252,226		$	152,370		$	1,909,565		$	3,043,690	$	3,412,621
Weighted average interest rate	5.46		%	6.40		%	6.33		%	7.49		%	6.71		%	5.88		%

As the above table incorporates only those exposures that exist as of September 30, 2012, it does not consider those exposures or positions that could arise after that date. As a result, our ultimate realized gain or loss with respect to interest rate fluctuations will depend on the exposures that arise during the period, our hedging strategies at that time to the extent we are party to interest rate derivatives and interest rates. Interest expense on our unsecured lines of credit 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 lines 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, 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.

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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, 2012, 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 Reports on Form 10-K for the year ended December 31, 2011. The risks and uncertainties described in our 2011 Annual Reports 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 April 25, 2012, the board of directors adopted a resolution that amended and restated the Repurchase Program and delegated authority to management to repurchase a maximum of $100.0 million of common shares, $300.0 million of debt securities

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and $150.0 million of preferred shares (the “April 2012 Resolution”). The April 2012 Resolution will expire on April 25, 2013. We did not repurchase any securities through the Repurchase Program during the quarter ended September 30, 2012 and the maximum amounts set forth under the April 2012 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 our 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 our 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).
3.2	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).
4.1	Ninth Supplemental Indenture, dated September 19, 2012, by and between the Partnership and The Bank of New York Mellon Trust, N.A. (as successor to J.P. Morgan Trust Company, National Association), including the form of global note evidencing the 3.875% Senior Notes Due 2022 (filed as Exhibit 4.1 to the General Partner's Current Report on Form 8-K as filed with the SEC on September 19, 2012, and incorporated herein by this reference).
10.1	Terms Agreement, dated September 14, 2012, by and among the General Partner, the Partnership, Barclays Capital Inc., Morgan Stanley & Co. LLC, UBS Securities LLC and Wells Fargo Securities, LLC (filed as Exhibit 1.1 to the General Partner's Current Report on Form 8-K as filed with the SEC on September 19, 2012, and incorporated herein by this reference).
11.1	Statement Regarding Computation of Earnings.***
12.1	Statement of Computation of Ratio of Earnings to Fixed Charges and Ratio of Earnings to Combined Fixed Charges and Preferred Dividends of the General Partner.*
12.2	Statement of Computation of Ratio of Earnings to Fixed Charges and Ratio of Earnings to Combined Fixed Charges and Preferred Distributions of the Partnership.*
31.1	Rule 13a-14(a) Certification of the Chief Executive Officer of the General Partner.*
31.2	Rule 13a-14(a) Certification of the Chief Financial Officer of the General Partner.*
31.3	Rule 13a-14(a) Certification of the Chief Executive Officer for the Partnership.*

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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, 2012 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, (v) the Notes to Consolidated Financial Statements.

* Filed herewith.

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

*** Data required by Financial Accounting Standards Board Auditing Standards Codification No. 260 is provided in Note 8 to the Consolidated Financial Statements included in this report.

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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/ Christie B. Kelly

Christie B. Kelly

Executive Vice President and Chief Financial Officer

/s/ Mark A. Denien

Mark A. Denien

Senior Vice President and Chief Accounting 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/ Christie B. Kelly
		Christie B. Kelly
		Executive Vice President and Chief Financial Officer of the General Partner
		/s/ Mark A. Denien
		Mark A. Denien
		Senior Vice President and Chief Accounting Officer of the General Partner
Date:	November 2, 2012

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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, 2012				Year Ended December 31, 2011				Year Ended December 31, 2010				Year Ended December 31, 2009				Year Ended December 31, 2008			Year Ended December 31, 2007
Net income (loss) from continuing operations, less preferred dividends	$	(98,737	)		$	(63,536	)		$	(30,588	)		$	(306,948	)		$	18,071		$	112,435
Preferred dividends	35,356				60,353				69,468				73,451				71,426			58,292
Interest expense	183,623				221,420				187,342				149,721				134,921			109,999
Earnings (loss) before fixed charges	$	120,242			$	218,237			$	226,222			$	(83,776	)		$	224,418		$	280,726
Interest expense	$	183,623			$	221,420			$	187,342			$	149,721			$	134,921		$	109,999
Interest costs capitalized	6,199				4,335				11,498				26,864				53,456			59,167
Total fixed charges	189,822				225,755				198,840				176,585				188,377			169,166
Preferred dividends	35,356				60,353				69,468				73,451				71,426			58,292
Total fixed charges and preferred dividends	$	225,178			$	286,108			$	268,308			$	250,036			$	259,803		$	227,458
Ratio of earnings to fixed charges	N/A			(1)	N/A			(3)	1.14				N/A			(6)	1.19			1.66
Ratio of earnings to fixed charges and preferred dividends	N/A			(2)	N/A			(4)	N/A			(5)	N/A			(7)	N/A		(8)	1.23

(1) N/A - The ratio is less than 1.0; deficit of $69.6 million exists for the nine months ended September 30, 2012. The calculation of earnings includes $279.1 million of non-cash depreciation and amortization expense.

(2) N/A - The ratio is less than 1.0; deficit of $104.9 million exists for the nine months ended September 30, 2012. The calculation of earnings includes $279.1 million of non-cash depreciation and amortization expense.

(3) N/A - The ratio is less than 1.0; deficit of $7.5 million exists for the year ended December 31, 2011. The calculation of earnings includes $328.2 million of non-cash depreciation and amortization expense.

(4) N/A - The ratio is less than 1.0; deficit of $67.9 million exists for the year ended December 31, 2011. The calculation of earnings includes $328.2 million of non-cash depreciation and amortization expense.

(5) N/A - The ratio is less than 1.0; deficit of $42.1 million exists for the year ended December 31, 2010. The calculation of earnings includes $277.4 million of non-cash depreciation and amortization expense.

(6) N/A - The ratio is less than 1.0; deficit of $260.4 million exists for the year ended December 31, 2009. The calculation of earnings includes $243.1 million of non-cash depreciation and amortization expense.

(7) N/A - The ratio is less than 1.0; deficit of $333.8 million exists for the year ended December 31, 2009. The calculation of earnings includes $243.1 million of non-cash depreciation and amortization expense.

(8) N/A - The ratio is less than 1.0; deficit of $35.4 million exists for the year ended December 31, 2008. The calculation of earnings includes $210.9 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, 2012				Year Ended December 31, 2011				Year Ended December 31, 2010				Year Ended December 31, 2009				Year Ended December 31, 2008			Year Ended December 31, 2007
Net income (loss) from continuing operations, less preferred distributions	$	(98,737	)		$	(63,536	)		$	(30,588	)		$	(306,948	)		$	18,071		$	112,434
Preferred distributions	35,356				60,353				69,468				73,451				71,426			58,292
Interest expense	183,623				221,420				187,342				149,721				134,921			109,999
Earnings (loss) before fixed charges	$	120,242			$	218,237			$	226,222			$	(83,776	)		$	224,418		$	280,725
Interest expense	$	183,623			$	221,420			$	187,342			$	149,721			$	134,921		$	109,999
Interest costs capitalized	6,199				4,335				11,498				26,864				53,456			59,167
Total fixed charges	189,822				225,755				198,840				176,585				188,377			169,166
Preferred distributions	35,356				60,353				69,468				73,451				71,426			58,292
Total fixed charges and preferred distributions	$	225,178			$	286,108			$	268,308			$	250,036			$	259,803		$	227,458
Ratio of earnings to fixed charges	N/A			(1)	N/A			(3)	1.14				N/A			(6)	1.19			1.66
Ratio of earnings to fixed charges and preferred distributions	N/A			(2)	N/A			(4)	N/A			(5)	N/A			(7)	N/A		(8)	1.23

(1) N/A - The ratio is less than 1.0; deficit of $69.6 million exists for the nine months ended September 30, 2012. The calculation of earnings includes $279.1 million of non-cash depreciation and amortization expense.

(2) N/A - The ratio is less than 1.0; deficit of $104.9 million exists for the nine months ended September 30, 2012. The calculation of earnings includes $279.1 million of non-cash depreciation and amortization expense.

(3) N/A - The ratio is less than 1.0; deficit of $7.5 million exists for the year ended December 31, 2011. The calculation of earnings includes $328.2 million of non-cash depreciation and amortization expense.

(4) N/A - The ratio is less than 1.0; deficit of $67.9 million exists for the year ended December 31, 2011. The calculation of earnings includes $328.2 million of non-cash depreciation and amortization expense.

(5) N/A - The ratio is less than 1.0; deficit of $42.1 million exists for the year ended December 31, 2010. The calculation of earnings includes $277.4 million of non-cash depreciation and amortization expense.

(6) N/A - The ratio is less than 1.0; deficit of $260.4 million exists for the year ended December 31, 2009. The calculation of earnings includes $243.1 million of non-cash depreciation and amortization expense.

(7) N/A - The ratio is less than 1.0; deficit of $333.8 million exists for the year ended December 31, 2009. The calculation of earnings includes $243.1 million of non-cash depreciation and amortization expense.

(8) N/A - The ratio is less than 1.0; deficit of $35.4 million exists for the year ended December 31, 2008. The calculation of earnings includes $210.9 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 2, 2012

/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, Christie B. Kelly, 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 2, 2012

/s/ Christie B. Kelly

Christie B. Kelly

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 2, 2012

/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, Christie B. Kelly, 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 2, 2012

/s/ Christie B. Kelly

Christie B. Kelly

Executive Vice President and Chief Financial Officer of the General Partner

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Duke Realty Corporation (the “General Partner”) on Form 10-Q for the quarter ending September 30, 2012 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 2, 2012

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, 2012 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Christie B. Kelly, 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/ Christie B. Kelly
Christie B. Kelly
Executive Vice President and Chief Financial Officer
Date:	November 2, 2012

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, 2012 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 2, 2012

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, 2012 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Christie B. Kelly, 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/ Christie B. Kelly
Christie B. Kelly
Executive Vice President and Chief Financial Officer of the General Partner
Date:	November 2, 2012

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 (Summary on Revenues and Funds from Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Rental and related revenue	$ 208,957	$ 184,581	$ 616,451	$ 554,752
General contractor and service fee revenue (''Service Operations'')	93,932	127,708	226,507	409,617
Total Segment Revenues	298,735	309,318	836,562	956,150
Consolidated Revenue from continuing operations	302,889	312,289	842,958	964,369
Discontinued Operations	143	50,315	2,987	151,373
Consolidated Revenue	303,032	362,604	845,945	1,115,742
Net earnings excluding depreciation and Non-Segment Items	143,557	128,348	432,588	392,643
Interest expense	(61,539)	(54,528)	(183,623)	(161,765)
Interest and other income	150	172	394	543
Other operating expenses	(130)	(60)	(591)	(171)
General and administrative expenses	(8,934)	(9,493)	(32,367)	(29,231)
Undeveloped land carrying costs	(2,140)	(2,259)	(6,606)	(7,021)
Acquisition-related activity	(954)	(342)	(2,563)	(1,525)
Income tax benefit	103	194	103	194
Other non-segment income	3,278	1,934	4,119	4,456
Net (income) loss attributable to noncontrolling interests - consolidated entities not wholly owned by the Partnership	(59)	(43)	(365)	163
Joint venture items	8,997	11,635	27,999	30,597
Dividends on preferred shares/units	(11,081)	(14,399)	(35,356)	(46,347)
Adjustments for redemption/repurchase of preferred shares/units	0	(3,633)	(5,730)	(3,796)
Discontinued operations	(92)	14,745	17	41,163
FFO of Partnership Attributable To Common Unitholders	71,156	72,271	198,019	219,903
Net (income) loss attributable to noncontrolling interests - common limited partnership interests in the Partnership	459	868	1,736	369
Noncontrolling Interest Share of FFO Adjustments	(1,638)	(2,835)	(5,358)	(6,206)
FFO of General Partner attributable to common shareholders	69,977	70,304	194,397	214,066
Depreciation and amortization on continuing operations	(95,117)	(81,068)	(279,136)	(242,043)
Depreciation and Amortization, Discontinued Operations	(22)	(16,267)	(1,202)	(50,386)
Company's share of joint venture adjustments	(8,782)	(8,531)	(26,008)	(24,798)
Earnings from depreciated property sales on continuing operations	403	(1,437)	245	66,910
Earnings from depreciated property sales on discontinued operations	1,608	2,088	11,179	16,405
Earnings from depreciated property sales - share of joint venture	2,065	0	2,065	91
Noncontrolling Interest Share of FFO Adjustments, Reconciliation Add-Back	1,638	2,835	5,358	6,206
Net income (loss) attributable to common shareholders/unitholders	(28,230)	(32,076)	(93,102)	(13,549)
Add back: Net income (loss) attributable to noncontrolling interests - common limited partnership interests in the Partnership	(459)	(868)	(1,736)	(369)
Net income (loss) attributable to common unitholders	(28,689)	(32,944)	(94,838)	(13,918)
Industrial [Member]
Rental and related revenue	109,400	95,676	327,713	281,083
Net earnings excluding depreciation and Non-Segment Items	81,165	70,214	244,651	203,854
Office [Member]
Rental and related revenue	67,701	66,157	201,606	207,387
Net earnings excluding depreciation and Non-Segment Items	38,302	38,271	117,367	120,999
Medical Office [Member]
Rental and related revenue	23,007	14,292	64,669	41,280
Net earnings excluding depreciation and Non-Segment Items	14,851	8,797	42,344	25,121
Non-reportable Rental Operations segments [Member]
Rental and related revenue	4,695	5,485	16,067	16,783
Net earnings excluding depreciation and Non-Segment Items	3,026	3,905	11,238	12,232
Other Revenue [Member]
Rental and related revenue	4,154	2,971	6,396	8,219
Service Operations [Member]
Net earnings excluding depreciation and Non-Segment Items	$ 6,213	$ 7,161	$ 16,988	$ 30,437

XML

Indebtedness (Summary of Book Value and Changes in Fair Value of Debt) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Book value	$ 4,140,145	$ 3,809,589
Fair value	4,606,449	4,117,230
Issuances and assumptions	632,046
Payments/Payoffs	(299,907)
Adjustments to fair value	157,080
Fixed Rate Secured Debt [Member]
Book value	1,077,991	1,167,188
Fair value	1,174,864	1,256,331
Issuances and assumptions	18,741
Payments/Payoffs	(106,355)
Adjustments to fair value	6,147
Variable Rate Secured Debt [Member]
Book value	18,464	6,045
Fair value	18,964	6,045
Issuances and assumptions	13,305
Payments/Payoffs	(885)
Adjustments to fair value	499
Unsecured Debt [Member]
Book value	3,043,690	2,616,063
Fair value	3,412,621	2,834,610
Issuances and assumptions	600,000
Payments/Payoffs	(172,374)
Adjustments to fair value	150,385
Line of Credit [Member]
Book value	0	20,293
Fair value	0	20,244
Issuances and assumptions	0
Payments/Payoffs	(20,293)
Adjustments to fair value	$ 49

XML

Discontinued Operations and Assets Held for Sale (Tables)

9 Months Ended

Sep. 30, 2012

Discontinued Operations and Disposal Groups [Abstract]

Table Illustration of Number of Properties in Discontinued Operations

	Sold in 2012	Sold in 2011	Total
Office	9	93	102
Industrial	11	7	18
Retail	1	1	2
	21	101	122

Table Illustration of Discontinued Operations in Statement of Operations

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
Revenues	$	143		$	50,315		$	2,987		$	151,373
Operating expenses	(140		)	(22,912		)	(1,826		)	(70,599		)
Depreciation and amortization	(22		)	(16,267		)	(1,202		)	(50,386		)
Operating income (loss)	(19		)	11,136			(41		)	30,388
Interest expense	(95		)	(12,658		)	(1,144		)	(39,611		)
Loss before gain on sales	(114		)	(1,522		)	(1,185		)	(9,223		)
Gain on sale of depreciable properties	1,608			2,088			11,179			16,405
Income from discontinued operations	$	1,494		$	566		$	9,994		$	7,182

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

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
Loss from continuing operations attributable to common shareholders	$	(29,700	)	$	(32,626	)	$	(102,913	)	$	(20,541	)
Income from discontinued operations attributable to common shareholders	1,470			550			9,811			6,992
Net loss attributable to common shareholders	$	(28,230	)	$	(32,076	)	$	(93,102	)	$	(13,549	)

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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, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Discontinued Operations
Revenues	$ 143	$ 50,315	$ 2,987	$ 151,373
Operating Expenses	(140)	(22,912)	(1,826)	(70,599)
Depreciation and Amortization, Discontinued Operations	(22)	(16,267)	(1,202)	(50,386)
Operating Income (Loss)	(19)	11,136	(41)	30,388
Interest Expense	(95)	(12,658)	(1,144)	(39,611)
Income (loss) before gain on sales	(114)	(1,522)	(1,185)	(9,223)
Earnings from depreciated property sales on discontinued operations	1,608	2,088	11,179	16,405
Income (loss) from discontinued operations	$ 1,494	$ 566	$ 9,994	$ 7,182

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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, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss) attributable to common shareholders/unitholders	$ (28,230)	$ (32,076)	$ (93,102)	$ (13,549)
Less: Dividends on Participating Securities	(680)	(811)	(2,388)	(2,416)
Basic Net Income (Loss) Attributable To Common Stockholders	(28,910)	(32,887)	(95,490)	(15,965)
Net Income (Loss) Attributable to Noncontrolling Interest, Operating Partnerships	0	0	0	0
Diluted Net Income (Loss) Attributable to Common Stockholders	(28,910)	(32,887)	(95,490)	(15,965)
Weighted average number of common shares/units outstanding	270,289	252,802	265,153	252,618
Weighted Average Limited Partnership Units Outstanding	0	0	0	0
Other potential dilutive shares/units	0	0	0	0
Weighted average number of common shares/units and potential dilutive securities	270,289	252,802	265,153	252,618
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	(28,689)	(32,944)	(94,838)	(13,918)
Less: Dividends on Participating Securities	(680)	(811)	(2,388)	(2,416)
Basic Net Income (Loss) Attributable To Common Stockholders	$ (29,369)	$ (33,755)	$ (97,226)	$ (16,334)
Weighted average number of common shares/units outstanding	274,800	259,866	270,095	259,505
Other potential dilutive shares/units	0	0	0	0
Weighted average number of common shares/units and potential dilutive securities	274,800	259,866	270,095	259,505

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Reclassifications

9 Months Ended

Sep. 30, 2012

Reclassifications [Abstract]

Reclassifications

Reclassifications

Certain amounts in the accompanying consolidated financial statements for 2011 have been reclassified to conform to the 2012 consolidated financial statement presentation.

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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, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Discontinued Operations
Income (loss) from continuing operations attributable to common shareholders	$ (29,700)	$ (32,626)	$ (102,913)	$ (20,541)
Income (loss) from discontinued operations attributable to common shareholders	1,470	550	9,811	6,992
Net income (loss) attributable to common shareholders/unitholders	$ (28,230)	$ (32,076)	$ (93,102)	$ (13,549)

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Acquisitions and Dispositions (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Proceeds from land and depreciated property sales, net	$ 112,559	$ 504,688
Other 2012 Acquisitions [Member] [Domain]
Total acquired assets	346,051
Real estate assets	292,754
Lease-related intangible assets	50,468
Number of real estate properties acquired	18
Weighted average remaining life of property (years)	11 years 1 month
Medical Office Properties [Member] | Other 2012 Acquisitions [Member] [Domain]
Number of real estate properties acquired	12
Columbus Ohio [Member] | Industrial [Member] | Other 2012 Acquisitions [Member] [Domain]
Number of real estate properties acquired	2
Chicago Illinois [Member] | Industrial [Member] | Other 2012 Acquisitions [Member] [Domain]
Number of real estate properties acquired	2
Southern California [Member] | Industrial [Member] | Other 2012 Acquisitions [Member] [Domain]
Number of real estate properties acquired	1
Atlanta Georgia [Member] | Industrial [Member] | Other 2012 Acquisitions [Member] [Domain]
Number of real estate properties acquired	1
Purchase Accounting Provisional [Domain] | Other 2012 Acquisitions [Member] [Domain]
Total acquired assets	90,100
Real estate assets	69,200
Lease-related intangible assets	$ 20,900

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Variable Interest Entities (Balances Related to Joint Ventures) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012 entities
Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]
Number of Unconsolidated Joint Ventures Considered Variable Interest Entities	3
Carrying Value of Investment in Unconsolidated Companies	$ 55.1
Maximum Loss Exposure from Investment in Unconsolidated Companies	55.1
Carrying Value of Guarantee Obligations	(24.3)	[1]
Maximum Loss Exposure from Guarantee Obligations	$ (145.8)	[1]

[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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Subsequent Events (Details) (Declaration of Dividends [Member], USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012
Subsequent Event [Line Items]
Declared date		Oct. 30, 2012
Common Stock [Member]
Subsequent Event [Line Items]
Common stock dividends declared per share	$ 0.17
Record date		Nov. 14, 2012
Payment date		Nov. 30, 2012
Series J Preferred Stock [Member]
Subsequent Event [Line Items]
Preferred stock dividends declared per share	$ 0.414063
Record date		Nov. 14, 2012
Payment date		Nov. 30, 2012
Series K Preferred Stock [Member]
Subsequent Event [Line Items]
Preferred stock dividends declared per share	$ 0.406250
Record date		Nov. 14, 2012
Payment date		Nov. 30, 2012
Series L Preferred Stock [Member]
Subsequent Event [Line Items]
Preferred stock dividends declared per share	$ 0.412500
Record date		Nov. 14, 2012
Payment date		Nov. 30, 2012
Series O Preferred Stock [Member]
Subsequent Event [Line Items]
Preferred stock dividends declared per share	$ 0.523437
Record date		Dec. 17, 2012
Payment date		Dec. 31, 2012

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Acquisitions and Dispositions (Summary of Allocation of Fair Value of Amounts Recognized) (Details) (Other 2012 Acquisitions [Member] [Domain], USD $) In Thousands, unless otherwise specified	Sep. 30, 2012
Other 2012 Acquisitions [Member] [Domain]
Real estate assets	$ 292,754
Lease-related intangible assets	50,468
Other assets	2,829
Total acquired assets	346,051
Secured debt	18,741
Other liabilities	1,251
Total assumed liabilities	19,992
Fair value of acquired net assets	$ 326,059

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Acquisitions and Dispositions (Summary of Significant Assumptions Utilized in Estimates) (Details) (USD $)	9 Months Ended
	Sep. 30, 2012 months
Minimum [Member]
Fair Value Inputs, Discount Rate	7.19%
Fair Value Inputs, Cap Rate	5.75%
Lease-up period (months)	9
Minimum [Member] | Industrial [Member]
Rental rate per square foot	2.75
Minimum [Member] | Medical Office [Member]
Rental rate per square foot	16.00
Maximum [Member]
Fair Value Inputs, Discount Rate	8.78%
Fair Value Inputs, Cap Rate	7.40%
Lease-up period (months)	19
Maximum [Member] | Industrial [Member]
Rental rate per square foot	7.62
Maximum [Member] | Medical Office [Member]
Rental rate per square foot	26.14

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General Basis of Presentation (Notes)

9 Months Ended

Sep. 30, 2012

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 2011 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 Annual Reports on Form 10-K of the General Partner and the Partnership, respectively, for the year ended December 31, 2011, 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 Annual Reports on Form 10-K of the General Partner and the Partnership, respectively, for the year ended December 31, 2011.

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.

The General Partner is the sole general partner of the Partnership, owning approximately 98.4% of the common partnership interests of the Partnership (“General Partner Units”) at September 30, 2012. The remaining 1.6% 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 9) are conducted through the Partnership. We conduct our Service Operations (see Note 9) through Duke Realty Services, LLC, Duke Realty Services Limited Partnership and Duke Construction Limited Partnership (“DCLP”), which are consolidated entities that are 100% owned by a combination of the General Partner and the Partnership. DCLP is owned through a taxable REIT subsidiary. The consolidated financial statements include our accounts and the accounts of our majority-owned or controlled subsidiaries.

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Indebtedness (Narrative) (Details) (USD $)	9 Months Ended			9 Months Ended		1 Months Ended	3 Months Ended		9 Months Ended		1 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Jul. 31, 2012	Sep. 30, 2012 Fixed Rate Secured Debt [Member] loans	Sep. 30, 2012 Variable Rate Secured Debt [Member]	Aug. 31, 2012 Fixed Rate Unsecured Debt [Member]	Sep. 30, 2012 Fixed Rate Unsecured Debt [Member]	Jun. 30, 2012 Fixed Rate Unsecured Debt [Member]	Sep. 30, 2012 Fixed Rate Unsecured Debt [Member]	Aug. 15, 2012 Fixed Rate Unsecured Debt [Member]	Jul. 31, 2012 Variable Rate Unsecured Debt [Member]	Sep. 30, 2012 Other 2012 Acquisitions [Member] [Domain]
Estimated rate of fixed rate secured debt, minimum				3.10%
Estimated rate of fixed rate secured debt, maximum				5.30%
Secured loans acquired				1
Face value from acquisition				$ 18,100,000
Business Acquisition, Purchase Price Allocation, Noncurrent Liabilities, Long-term Debt												18,741,000
Assumed weighted average interest rate				5.14%
Weighted average remaining term (years)				2 years 2 months 12 days
Estimated effective interest rate of loan				3.50%			3.93%	4.466%	3.93%	6.01%
Secured Debt, Variable Rate					13,300,000
Debt Instrument, Basis Spread on Variable Rate			0.85%		2.50%
Debt Instrument, Interest Rate at Period End					2.73%
Number of secured loans repaid				4
Repayments of Secured Debt	107,240,000	24,841,000		95,800,000
Debt, Weighted Average Interest Rate				6.02%
Proceeds from unsecured debt issuance	600,000,000	0					300,000,000	300,000,000
Debt Instrument, Interest Rate, Stated Percentage							3.875%	4.375%	3.875%
Repayments of Unsecured Notes	$ 172,374,000	$ 166,346,000				$ 150,000,000					$ 21,000,000
Estimated trading value of fixed rate unsecured debt, minimum percentage									100.00%
Estimated trading value of fixed rate unsecured debt, maximum percentage									132.00%
Debt Instrument, Covenant Compliance									We were in compliance with all such covenants as of September 30, 2012

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Segment Reporting (Reportable Segments Consolidated Assets) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Total Assets	$ 7,190,117	$ 7,004,437
Industrial [Member]
Total Assets	3,753,022	3,586,250
Office [Member]
Total Assets	1,676,389	1,742,196
Medical Office [Member]
Total Assets	820,898	580,177
All Other Segments [Member]
Total Assets	180,998	209,056
Service Operations [Member]
Total Assets	161,953	167,382
Reportable Segment [Member]
Total Assets	6,593,260	6,285,061
Unallocated Amount to Segment [Member]
Total Assets	0	455
Subsidiary of Common Parent [Member]
Total Assets	7,190,117	7,003,982
Subsidiary of Common Parent [Member]
Total Assets	7,190,117	7,003,982
Subsidiary of Common Parent [Member] | Unallocated Amount to Segment [Member]
Total Assets	$ 596,857	$ 718,921

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Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
ASSETS
Land and improvements	$ 1,239,276	$ 1,202,872
Buildings and tenant improvements	5,016,464	4,766,793
Construction in progress	219,931	44,259
Investments in and advances to unconsolidated companies	367,221	364,859
Undeveloped land	613,183	622,635
Real estate investment property, at cost, total	7,456,075	7,001,418
Accumulated depreciation	(1,246,853)	(1,108,650)
Net real estate investments	6,209,222	5,892,768
Real estate investments and other assets held-for-sale	0	55,580
Cash and cash equivalents	113,152	213,809
Accounts receivable, net of allowance of $3,080 and $3,597	29,737	22,255
Straight-line rent receivable, net of allowance of $5,274 and $7,447	117,016	105,900
Receivables on construction contracts, including retentions	36,413	40,247
Deferred financing costs, net of accumulated amortization of $45,233 and $59,109	42,095	42,268
Deferred leasing and other costs, net of accumulated amortization of $356,776 and $292,334	465,588	460,881
Escrow deposits and other assets	176,894	170,729
Total Assets	7,190,117	7,004,437
LIABILITIES AND EQUITY
Secured debt	1,096,455	1,173,233
Unsecured notes	3,043,690	2,616,063
Unsecured lines of credit	0	20,293
Long-term debt, total	4,140,145	3,809,589
Liabilities related to real estate investments held-for-sale	0	975
Construction payables and amounts due subcontractors, including retentions	80,934	55,775
Accrued real estate taxes	102,646	69,272
Accrued interest	36,666	58,904
Other accrued expenses	41,661	60,174
Other liabilities	122,776	131,735
Tenant security deposits and prepaid rents	40,248	38,355
Total Liabilities	4,565,076	4,224,779
Equity
Preferred shares ($.01 par value); 5,000 shares authorized; 2,503 and 3,176 shares issued and outstanding	625,638	793,910
Common shares ($.01 par value); 400,000 shares authorized; 273,519 and 252,927 shares issued and outstanding	2,735	2,529
Additional paid-in capital	3,871,155	3,594,588
Accumulated other comprehensive income	2,177	987
Distributions in excess of net income	(1,912,802)	(1,677,328)
Total shareholders' equity	2,588,903	2,714,686
Noncontrolling interests	36,138	64,972
Total Equity	2,625,041	2,779,658
Total Liabilities and Equity	7,190,117	7,004,437
Subsidiary of Common Parent [Member]
ASSETS
Land and improvements	1,239,276	1,202,872
Buildings and tenant improvements	5,016,464	4,766,793
Construction in progress	219,931	44,259
Investments in and advances to unconsolidated companies	367,221	364,859
Undeveloped land	613,183	622,635
Real estate investment property, at cost, total	7,456,075	7,001,418
Accumulated depreciation	(1,246,853)	(1,108,650)
Net real estate investments	6,209,222	5,892,768
Real estate investments and other assets held-for-sale	0	55,580
Cash and cash equivalents	113,152	213,826
Accounts receivable, net of allowance of $3,080 and $3,597	29,737	22,255
Straight-line rent receivable, net of allowance of $5,274 and $7,447	117,016	105,900
Receivables on construction contracts, including retentions	36,413	40,247
Deferred financing costs, net of accumulated amortization of $45,233 and $59,109	42,095	42,268
Deferred leasing and other costs, net of accumulated amortization of $356,776 and $292,334	465,588	460,881
Escrow deposits and other assets	176,894	170,257
Total Assets	7,190,117	7,003,982
LIABILITIES AND EQUITY
Secured debt	1,096,455	1,173,233
Unsecured notes	3,043,690	2,616,063
Unsecured lines of credit	0	20,293
Long-term debt, total	4,140,145	3,809,589
Liabilities related to real estate investments held-for-sale	0	975
Construction payables and amounts due subcontractors, including retentions	80,934	55,775
Accrued real estate taxes	102,646	69,272
Accrued interest	36,666	58,904
Other accrued expenses	41,768	59,795
Other liabilities	122,776	131,735
Tenant security deposits and prepaid rents	40,248	38,355
Total Liabilities	4,565,183	4,224,400
Equity
Common equity (273,519 and 252,927 General Partner Units issued and outstanding)	1,965,154	1,923,886
Preferred equity (2,503 and 3,176 Preferred Units issued and outstanding)	625,638	793,910
General Partners' equity	2,590,792	2,717,796
Limited Partners' common equity (4,511 and 6,945 Limited Partner Units issued and outstanding)	22,993	56,254
Accumulated other comprehensive income	2,177	987
Total partners' equity	2,615,962	2,775,037
Noncontrolling interests	8,972	4,545
Total Equity	2,624,934	2,779,582
Total Liabilities and Equity	$ 7,190,117	$ 7,003,982

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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, 2011								$ 2,779,582	$ 793,910	$ 1,923,886	$ 56,254	$ 987	$ 4,545	$ 2,775,037
Beginning Balance - General Partner at Dec. 31, 2011	2,779,658	793,910	2,529	3,594,588	987	(1,677,328)	64,972
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(53,387)					(52,016)	(1,371)	(53,387)	35,356	(87,372)	(1,736)		365	(53,752)
Other comprehensive income	1,190				1,190			1,190				1,190		1,190
Issuance of common shares	235,829		169	235,660
Capital contribution from the General Partner								235,829		235,829				235,829
Stock based compensation plan activity	3,882		13	6,199		(2,330)		3,907		3,907				3,907
Conversion of Limited Partner Units			24	28,978			(29,002)			29,002	(29,002)
Distributions to preferred shareholders/unitholders	(35,356)					(35,356)		(35,356)	(35,356)					(35,356)
Redemption of preferred shares/units	(168,272)	(168,272)		5,730		(5,730)		(168,272)	(168,272)					(168,272)
Distributions to common shareholders ($0.51 per share)	(135,083)					(135,083)
Distributions to Partners ($0.51 per Common Unit)								(137,662)		(135,139)	(2,523)			(137,662)
Contributions from (distributions to) noncontrolling interests, net	2,788						2,788	5,311					5,311
Buyout of noncontrolling interests	(6,208)					(4,959)	(1,249)	(6,208)		(4,959)			(1,249)	(4,959)
Ending Balance - Partnership at Sep. 30, 2012								2,624,934	625,638	1,965,154	22,993	2,177	8,972	2,615,962
Ending Balance - General Partner at Sep. 30, 2012	2,625,041	625,638	2,735	3,871,155	2,177	(1,912,802)	36,138
Beginning Balance - Partnership at Jun. 30, 2012
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(17,549)							(17,549)
Other comprehensive income	410							410
Ending Balance - Partnership at Sep. 30, 2012								2,624,934
Ending Balance - General Partner at Sep. 30, 2012	$ 2,625,041

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Shareholders' Equity (Details) (USD $) Share data in Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Payments for Repurchase of Redeemable Preferred Stock			$ 168,272,000	$ 110,726,000
Adjustments for redemption/repurchase of preferred shares/units	0	(3,633,000)	(5,730,000)	(3,796,000)
Common shares, shares issued			16.9
Issuance of common shares			236,301,000	0
Payments for Commissions			4,800,000
6.95% Series M Cumulative Redeemable Preferred Shares [Member]
Preferred stock dividend rate, percentage			6.95%
Payments for Repurchase of Redeemable Preferred Stock			168,300,000
Adjustments for redemption/repurchase of preferred shares/units			(5,700,000)
Gross Proceeds [Member]
Issuance of common shares			$ 241,500,000

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Related Party Transactions (Tables)

9 Months Ended

Sep. 30, 2012

Related Party Transactions [Abstract]

Schedule of Fees Earned from Related Parties

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2012		2011		2012		2011
Management fees	$	2,796	$	2,770	$	8,251	$	7,393
Leasing fees	622		826		2,856		3,627
Construction and development fees	1,860		1,786		3,615		4,182

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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, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Management Fees [Member]
Revenue from related party transactions	$ 2,796	$ 2,770	$ 8,251	$ 7,393
Leasing Fees [Member]
Revenue from related party transactions	622	826	2,856	3,627
Construction and Development Fees [Member]
Revenue from related party transactions	$ 1,860	$ 1,786	$ 3,615	$ 4,182

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Segment Reporting (Tables)

9 Months Ended

Sep. 30, 2012

Segment Reporting [Abstract]

Summary on Revenues and Funds from Operations

	Three Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
Revenues
Rental Operations:
Industrial	$	109,400	$	95,676	$	327,713	$	281,083
Office	67,701		66,157		201,606		207,387
Medical Office	23,007		14,292		64,669		41,280
Non-reportable Rental Operations	4,695		5,485		16,067		16,783
General contractor and service fee revenue (“Service Operations”)	93,932		127,708		226,507		409,617
Total Segment Revenues	298,735		309,318		836,562		956,150

Other Revenue	4,154			2,971			6,396			8,219
Consolidated Revenue from continuing operations	302,889			312,289			842,958			964,369
Discontinued Operations	143			50,315			2,987			151,373
Consolidated Revenue	$	303,032		$	362,604		$	845,945		$	1,115,742
Reconciliation of Funds From Operations
Net earnings excluding depreciation and Non-Segment Items
Industrial	$	81,165		$	70,214		$	244,651		$	203,854
Office	38,302			38,271			117,367			120,999
Medical Office	14,851			8,797			42,344			25,121
Non-reportable Rental Operations	3,026			3,905			11,238			12,232
Service Operations	6,213			7,161			16,988			30,437
	143,557			128,348			432,588			392,643
Non-Segment Items:
Interest expense	(61,539		)	(54,528		)	(183,623		)	(161,765		)
Interest and other income	150			172			394			543
Other operating expenses	(130		)	(60		)	(591		)	(171		)
General and administrative expenses	(8,934		)	(9,493		)	(32,367		)	(29,231		)
Undeveloped land carrying costs	(2,140		)	(2,259		)	(6,606		)	(7,021		)
Acquisition-related activity	(954		)	(342		)	(2,563		)	(1,525		)
Income tax benefit	103			194			103			194
Other non-segment income	3,278			1,934			4,119			4,456
Net (income) loss attributable to noncontrolling interests - consolidated entities not wholly owned by the Partnership	(59		)	(43		)	(365		)	163
Joint venture items	8,997			11,635			27,999			30,597
Dividends on preferred shares/Preferred Units	(11,081		)	(14,399		)	(35,356		)	(46,347		)
Adjustments for redemption/repurchase of preferred shares/Preferred Units	—			(3,633		)	(5,730		)	(3,796		)
Discontinued operations	(92		)	14,745			17			41,163
FFO of Partnership attributable to common unitholders	71,156			72,271			198,019			219,903
Net loss attributable to noncontrolling interests - common limited partnership interests in the Partnership	459			868			1,736			369
Noncontrolling interest share of FFO adjustments	(1,638		)	(2,835		)	(5,358		)	(6,206		)
FFO of General Partner attributable to common shareholders	69,977			70,304			194,397			214,066
Depreciation and amortization on continuing operations	(95,117		)	(81,068		)	(279,136		)	(242,043		)
Depreciation and amortization on discontinued operations	(22		)	(16,267		)	(1,202		)	(50,386		)
Company’s share of joint venture adjustments	(8,782		)	(8,531		)	(26,008		)	(24,798		)
Earnings from depreciated property sales on continuing operations	403			(1,437		)	245			66,910
Earnings from depreciated property sales on discontinued operations	1,608			2,088			11,179			16,405
Earnings from depreciated property sales - share of joint venture	2,065			—			2,065			91
Noncontrolling interest share of FFO adjustments	1,638			2,835			5,358			6,206
Net loss of General Partner attributable to common shareholders	$	(28,230	)	$	(32,076	)	$	(93,102	)	$	(13,549	)
Add back: Net loss attributable to noncontrolling interests - common limited partnership interests in the Partnership	(459		)	(868		)	(1,736		)	(369		)
Net loss of Partnership attributable to common unitholders	$	(28,689	)	$	(32,944	)	$	(94,838	)	$	(13,918	)

Reportable Segments Consolidated Assets

	September 30, 2012		December 31, 2011
Assets
Rental Operations:
Industrial	$	3,753,022	$	3,586,250
Office	1,676,389		1,742,196
Medical Office	820,898		580,177
Non-reportable Rental Operations	180,998		209,056
Service Operations	161,953		167,382
Total Segment Assets	6,593,260		6,285,061
Non-Segment Assets - Partnership	596,857		718,921
Consolidated Assets - Partnership	$	7,190,117	$	7,003,982
Non-Segment Assets - General Partner	—		455
Consolidated Assets - General Partner	$	7,190,117	$	7,004,437

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Consolidated Statement of Changes in Equity (Parenthetical) (USD $)	9 Months Ended
	Sep. 30, 2012
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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Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Accounts receivable, allowance	$ 3,080	$ 3,597
Straight-line rent receivable, allowance	5,274	7,447
Deferred financing costs, accumulated amortization	45,233	59,109
Deferred leasing and other costs, accumulated amortization	356,776	292,334
Preferred shares, par value	$ 0.01	$ 0.01
Preferred shares, shares authorized	5,000,000	5,000,000
Preferred shares, shares issued	2,503,000	3,176,000
Preferred shares, shares outstanding	2,503,000	3,176,000
Common shares, par value	$ 0.01	$ 0.01
Common shares, shares authorized	400,000,000	400,000,000
Common shares, shares issued	273,519,000	252,927,000
Common shares, shares outstanding	273,519,000	252,927,000
Subsidiary of Common Parent [Member]
Accounts receivable, allowance	3,080	3,597
Straight-line rent receivable, allowance	5,274	7,447
Deferred financing costs, accumulated amortization	45,233	59,109
Deferred leasing and other costs, accumulated amortization	$ 356,776	$ 292,334
Common equity, General Partner Units issued	273,519,000	252,927,000
Common equity, General Partner Units outstanding	273,519,000	252,927,000
Preferred Units, Issued	2,503,000	3,176,000
Preferred Units, Outstanding	2,503,000	3,176,000
Limited Partner Units issued	4,511,000	6,945,000
Limited Partner Units outstanding	4,511,000	6,945,000

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Discontinued Operations and Assets Held for Sale

9 Months Ended

Sep. 30, 2012

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:

	Sold in 2012	Sold in 2011	Total
Office	9	93	102
Industrial	11	7	18
Retail	1	1	2
	21	101	122

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, 2012 and 2011, respectively (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
Revenues	$	143		$	50,315		$	2,987		$	151,373
Operating expenses	(140		)	(22,912		)	(1,826		)	(70,599		)
Depreciation and amortization	(22		)	(16,267		)	(1,202		)	(50,386		)
Operating income (loss)	(19		)	11,136			(41		)	30,388
Interest expense	(95		)	(12,658		)	(1,144		)	(39,611		)
Loss before gain on sales	(114		)	(1,522		)	(1,185		)	(9,223		)
Gain on sale of depreciable properties	1,608			2,088			11,179			16,405
Income from discontinued operations	$	1,494		$	566		$	9,994		$	7,182

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. While a portion of the income or loss attributable to noncontrolling interests is allocable to discontinued operations for the General Partner, the income (loss) from discontinued operations for all periods presented in the Partnership's Consolidated Statements of Operations and Comprehensive Income is entirely attributable to the common unitholders.

The following table illustrates the allocation of the income (loss) of the General Partner attributable to common shareholders between continuing operations and discontinued operations, reflecting the above-noted allocation of income or loss attributable to noncontrolling interests between continuing and discontinued operations, for the three and nine months ended September 30, 2012 and 2011, respectively (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
Loss from continuing operations attributable to common shareholders	$	(29,700	)	$	(32,626	)	$	(102,913	)	$	(20,541	)
Income from discontinued operations attributable to common shareholders	1,470			550			9,811			6,992
Net loss attributable to common shareholders	$	(28,230	)	$	(32,076	)	$	(93,102	)	$	(13,549	)

XML

Document and Entity Information	9 Months Ended
	Sep. 30, 2012	Nov. 02, 2012
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, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		275,025,508
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

XML

Subsequent Events

9 Months Ended

Sep. 30, 2012

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, 2012:

Class of stock/units	Quarterly Amount per Share or Unit	Record Date	Payment Date
Common	$0.17	November 14, 2012	November 30, 2012
Preferred (per depositary share or unit):
Series J	$0.414063	November 14, 2012	November 30, 2012
Series K	$0.406250	November 14, 2012	November 30, 2012
Series L	$0.412500	November 14, 2012	November 30, 2012
Series O	$0.523437	December 17, 2012	December 31, 2012

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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, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues:
Rental and related revenue	$ 208,957	$ 184,581	$ 616,451	$ 554,752
General contractor and service fee revenue	93,932	127,708	226,507	409,617
Revenues, total	302,889	312,289	842,958	964,369
Expenses:
Rental expenses	39,659	35,105	111,477	108,224
Real estate taxes	28,676	26,355	85,255	79,866
General contractor and other services expenses	87,719	120,547	209,519	379,180
Depreciation and amortization	95,117	81,068	279,136	242,043
Costs and expenses, total	251,171	263,075	685,387	809,313
Other operating activities:
Equity in earnings of unconsolidated companies	2,280	3,104	4,056	5,890
Gain on sale of properties	403	(1,437)	245	66,910
Undeveloped land carrying costs	(2,140)	(2,259)	(6,606)	(7,021)
Other operating expenses	(130)	(60)	(591)	(171)
General and administrative expenses	(8,934)	(9,493)	(32,367)	(29,231)
Other operation transactions, total	(8,521)	(10,145)	(35,263)	36,377
Operating income	43,197	39,069	122,308	191,433
Other income (expenses):
Interest and other income, net	150	172	394	543
Interest expense	(61,539)	(54,528)	(183,623)	(161,765)
Acquisition-related activity	(954)	(342)	(2,563)	(1,525)
Income (loss) from continuing operations before income taxes	(19,146)	(15,629)	(63,484)	28,686
Income tax benefit	103	194	103	194
Income (loss) from continuing operations	(19,043)	(15,435)	(63,381)	28,880
Discontinued operations:
Income (loss) before gain on sales	(114)	(1,522)	(1,185)	(9,223)
Gain on sale of depreciable properties	1,608	2,088	11,179	16,405
Income (loss) from discontinued operations	1,494	566	9,994	7,182
Net income (loss)	(17,549)	(14,869)	(53,387)	36,062
Dividends on preferred shares/units	(11,081)	(14,399)	(35,356)	(46,347)
Adjustments for redemption/repurchase of preferred shares/units	0	(3,633)	(5,730)	(3,796)
Net (income) loss attributable to noncontrolling interests - consolidated entities not wholly owned by the Partnership	(59)	(43)	(365)	163
Net (income) loss attributable to noncontrolling interests	400	825	1,371	532
Net income (loss) attributable to common shareholders/unitholders	(28,230)	(32,076)	(93,102)	(13,549)
Basic net income (loss) per common share/unit:
Continuing operations attributable to common shareholders/unitholders	$ (0.11)	$ (0.13)	$ (0.40)	$ (0.09)
Discontinued operations attributable to common shareholders/unitholders	$ 0.00	$ 0.00	$ 0.04	$ 0.03
Total	$ (0.11)	$ (0.13)	$ (0.36)	$ (0.06)
Diluted net income (loss) per common share/unit:
Continuing operations attributable to common shareholders/unitholders	$ (0.11)	$ (0.13)	$ (0.40)	$ (0.09)
Discontinued operations attributable to common shareholders/unitholders	$ 0.00	$ 0.00	$ 0.04	$ 0.03
Total	$ (0.11)	$ (0.13)	$ (0.36)	$ (0.06)
Weighted average number of common shares/units outstanding	270,289	252,802	265,153	252,618
Weighted average number of common shares/units and potential dilutive securities	270,289	252,802	265,153	252,618
Comprehensive income (loss):
Net income (loss)	(17,549)	(14,869)	(53,387)	36,062
Other comprehensive income:
Derivative instrument activity	410	437	1,190	1,925
Other comprehensive income	410	437	1,190	1,925
Comprehensive income (loss)	(17,139)	(14,432)	(52,197)	37,987
Subsidiary of Common Parent [Member]
Revenues:
Rental and related revenue	208,957	184,581	616,451	554,752
General contractor and service fee revenue	93,932	127,708	226,507	409,617
Revenues, total	302,889	312,289	842,958	964,369
Expenses:
Rental expenses	39,659	35,105	111,477	108,224
Real estate taxes	28,676	26,355	85,255	79,866
General contractor and other services expenses	87,719	120,547	209,519	379,180
Depreciation and amortization	95,117	81,068	279,136	242,043
Costs and expenses, total	251,171	263,075	685,387	809,313
Other operating activities:
Equity in earnings of unconsolidated companies	2,280	3,104	4,056	5,890
Gain on sale of properties	403	(1,437)	245	66,910
Undeveloped land carrying costs	(2,140)	(2,259)	(6,606)	(7,021)
Other operating expenses	(130)	(60)	(591)	(171)
General and administrative expenses	(8,934)	(9,493)	(32,367)	(29,231)
Other operation transactions, total	(8,521)	(10,145)	(35,263)	36,377
Operating income	43,197	39,069	122,308	191,433
Other income (expenses):
Interest and other income, net	150	172	394	543
Interest expense	(61,539)	(54,528)	(183,623)	(161,765)
Acquisition-related activity	(954)	(342)	(2,563)	(1,525)
Income (loss) from continuing operations before income taxes	(19,146)	(15,629)	(63,484)	28,686
Income tax benefit	103	194	103	194
Income (loss) from continuing operations	(19,043)	(15,435)	(63,381)	28,880
Discontinued operations:
Income (loss) before gain on sales	(114)	(1,522)	(1,185)	(9,223)
Gain on sale of depreciable properties	1,608	2,088	11,179	16,405
Income (loss) from discontinued operations	1,494	566	9,994	7,182
Net income (loss)	(17,549)	(14,869)	(53,387)	36,062
Dividends on preferred shares/units	(11,081)	(14,399)	(35,356)	(46,347)
Adjustments for redemption/repurchase of preferred shares/units	0	(3,633)	(5,730)	(3,796)
Net (income) loss attributable to noncontrolling interests - consolidated entities not wholly owned by the Partnership	(59)	(43)	(365)	163
Net income (loss) attributable to common shareholders/unitholders	(28,689)	(32,944)	(94,838)	(13,918)
Basic net income (loss) per common share/unit:
Continuing operations attributable to common shareholders/unitholders	$ (0.11)	$ (0.13)	$ (0.40)	$ (0.09)
Discontinued operations attributable to common shareholders/unitholders	$ 0.00	$ 0.00	$ 0.04	$ 0.03
Total	$ (0.11)	$ (0.13)	$ (0.36)	$ (0.06)
Diluted net income (loss) per common share/unit:
Continuing operations attributable to common shareholders/unitholders	$ (0.11)	$ (0.13)	$ (0.40)	$ (0.09)
Discontinued operations attributable to common shareholders/unitholders	$ 0.00	$ 0.00	$ 0.04	$ 0.03
Total	$ (0.11)	$ (0.13)	$ (0.36)	$ (0.06)
Weighted average number of common shares/units outstanding	274,800	259,866	270,095	259,505
Weighted average number of common shares/units and potential dilutive securities	274,800	259,866	270,095	259,505
Comprehensive income (loss):
Net income (loss)	(17,549)	(14,869)	(53,387)	36,062
Other comprehensive income:
Derivative instrument activity	410	437	1,190	1,925
Other comprehensive income	410	437	1,190	1,925
Comprehensive income (loss)	$ (17,139)	$ (14,432)	$ (52,197)	$ 37,987

XML

Indebtedness

9 Months Ended

Sep. 30, 2012

Debt Disclosure [Abstract]

Indebtedness

Indebtedness

All debt is held directly or indirectly by the Partnership. The General Partner itself does not have any indebtedness, but does guarantee 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, 2012 (in thousands):

	Book Value at 12/31/11		Book Value at 9/30/12		Fair Value at 12/31/11		Issuances and Assumptions		Payments/Payoffs			Adjustments to Fair Value		Fair Value at 9/30/12
Fixed rate secured debt	$	1,167,188	$	1,077,991	$	1,256,331	$	18,741	$	(106,355	)	$	6,147	$	1,174,864
Variable rate secured debt	6,045		18,464		6,045		13,305		(885		)	499		18,964
Unsecured notes	2,616,063		3,043,690		2,834,610		600,000		(172,374		)	150,385		3,412,621
Unsecured lines of credit	20,293		—		20,244		—		(20,293		)	49		—
Total	$	3,809,589	$	4,140,145	$	4,117,230	$	632,046	$	(299,907	)	$	157,080	$	4,606,449

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 3.10% to 5.30%, depending on the attributes of the specific loans. The current market rates we utilized were internally estimated; therefore, we have concluded that our determination of fair value for our fixed rate secured debt was primarily based upon Level 3 inputs.

We assumed one secured loan in conjunction with our acquisition activity in 2012. This assumed loan had a total face value of $18.1 million and fair value of $18.7 million. This assumed loan carries a stated interest rate of 5.14% and a remaining term upon acquisition of 2.2 years. We used an estimated market rate of 3.50% in determining the fair value of this loan.

In June 2012, 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 2.50% (equal to 2.73% for outstanding borrowings as of September 30, 2012) and maturing June 29, 2017.

During the nine months ended September 30, 2012, we repaid four secured loans at their maturity dates totaling $95.8 million. The loans had a weighted average stated interest rate of 6.02%.

Unsecured Notes

In June 2012, we issued $300.0 million of senior unsecured notes that bear interest at 4.375%, have an effective rate of 4.466% and mature on June 15, 2022. In September 2012, we issued an additional $300.0 million of unsecured notes that bear interest at 3.875%, have an effective rate of 3.93%, and mature on October 15, 2022.

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 date. 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.

At September 30, 2012, all of our unsecured notes bear interest at fixed rates. 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, as defined. The estimated trading values of our fixed rate unsecured debt, depending on the maturity and coupon rates, ranged from 100.00% to 132.00% of face value.

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 of September 30, 2012.

Unsecured Line of Credit

Our unsecured line of credit as of September 30, 2012 is described as follows (in thousands):

Description	Maximum Capacity		Maturity Date	Outstanding Balance at September 30, 2012
Unsecured Line of Credit - Partnership	$	850,000	December 2015	$	—

The Partnership's unsecured line of credit has an interest rate on borrowings of LIBOR plus 1.25%, 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). As of September 30, 2012, we were in compliance with all covenants under this line of credit.

Through July 2012, a consolidated subsidiary had an unsecured line of credit that allowed for borrowings up to $30.0 million and bore interest at a rate of LIBOR plus 0.85%. This unsecured line of credit was used to fund development activities within the consolidated subsidiary and the outstanding balance of $20.3 million was repaid at its maturity in July 2012.

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.

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Acquisitions and Dispositions

9 Months Ended

Sep. 30, 2012

Business Combinations [Abstract]

Acquisitions and Dispositions

Acquisitions and Dispositions

2012 Acquisitions

We acquired 18 operating properties during the nine months ended September 30, 2012. These acquisitions consisted of two industrial properties near Chicago, Illinois, two industrial properties in Columbus, Ohio, one industrial property in Southern California, one industrial property in Atlanta, Georgia and twelve medical office properties in various markets. The following table summarizes our allocation of the fair value of amounts recognized for each major class of asset and liability (in thousands) for these acquisitions:

Real estate assets	$	292,754
Lease related intangible assets	50,468
Other assets	2,829
Total acquired assets	346,051
Secured debt	18,741
Other liabilities	1,251
Total assumed liabilities	19,992
Fair value of acquired net assets	$	326,059

On September 28, 2012 we acquired a seven-building medical office portfolio for $90.1 million. The initial accounting for this acquisition is incomplete as of September 30, 2012 and the summary above includes a provisional allocation of $69.2 million to real estate assets and $20.9 million to lease related intangible assets. The measurement period adjustments required to finalize the accounting for this acquisition will have little or no impact related to the three or nine months ended September 30, 2012 on the Consolidated Statement of Operations, when considering the timing of the acquisition.

The leases in the acquired properties had a weighted average remaining life at acquisition of approximately 11.1 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, 2012 were as follows:

	Low		High
Discount rate	7.19	%	8.78	%
Exit capitalization rate	5.75	%	7.40	%
Lease-up period (months)	9		19
Net rental rate per square foot – Industrial	$2.75		$7.62
Net rental rate per square foot – Medical Office	$16.00		$26.14

Acquisition-Related Activity

The acquisition-related activity in our consolidated Statements of Operations for the nine months ended September 30, 2012 and 2011 consists of transaction costs related to completed acquisitions, which are expensed as incurred.

Dispositions

We disposed of income-producing real estate assets and undeveloped land and received net cash proceeds of $112.6 million and $504.7 million during the nine months ended September 30, 2012 and 2011, respectively.

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Net Income (Loss) Per Common Share (Tables)

9 Months Ended

Sep. 30, 2012

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,
	2012			2011			2012			2011
General Partner
Net loss attributable to common shareholders	$	(28,230	)	$	(32,076	)	$	(93,102	)	$	(13,549	)
Less: Dividends on participating securities	(680		)	(811		)	(2,388		)	(2,416		)
Basic net loss attributable to common shareholders	(28,910		)	(32,887		)	(95,490		)	(15,965		)
Noncontrolling interest in earnings of common unitholders	—			—			—			—
Diluted net loss attributable to common shareholders	$	(28,910	)	$	(32,887	)	$	(95,490	)	$	(15,965	)
Weighted average number of common shares outstanding	270,289			252,802			265,153			252,618
Weighted average Limited Partner Units outstanding	—			—			—			—
Other potential dilutive shares	—			—			—			—
Weighted average number of common shares and potential dilutive securities	270,289			252,802			265,153			252,618
Partnership
Net loss attributable to common unitholders	$	(28,689	)	$	(32,944	)	$	(94,838	)	$	(13,918	)
Less: Distributions on participating securities	(680		)	(811		)	(2,388		)	(2,416		)
Basic and diluted net loss attributable to common unitholders	$	(29,369	)	$	(33,755	)	$	(97,226	)	$	(16,334	)
Weighted average number of Common Units outstanding	274,800			259,866			270,095			259,505
Other potential dilutive units	—			—			—			—
Weighted average number of Common Units and potential dilutive securities	274,800			259,866			270,095			259,505

Computation of Anti-Dilutive Common Share

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
General Partner
Noncontrolling interest in loss of common unitholders	$	(459	)	$	(868	)	$	(1,736	)	$	(369	)
Weighted average Limited Partner Units outstanding	4,511			7,064			4,942			6,887
General Partner and the Partnership
Other potential dilutive shares or units:
Anti-dilutive outstanding potential shares or units under fixed stock option and other stock-based compensation plans	1,763			1,677			1,763			1,677
Anti-dilutive potential shares or units under the Exchangeable Notes	—			3,432			—			3,432
Outstanding participating securities	4,045			4,840			4,045			4,840

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Variable Interest Entities (Tables)

9 Months Ended

Sep. 30, 2012

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

Balances Related to Joint Ventures

	Carrying Value			Maximum Loss Exposure
Investment in Unconsolidated Companies	$	55.1		$	55.1
Guarantee Obligations (1)	$	(24.3	)	$	(145.8	)

(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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Net Income (Loss) Per Common Share

9 Months Ended

Sep. 30, 2012

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 30,2012 and 2011, respectively (in thousands): 

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
General Partner
Net loss attributable to common shareholders	$	(28,230	)	$	(32,076	)	$	(93,102	)	$	(13,549	)
Less: Dividends on participating securities	(680		)	(811		)	(2,388		)	(2,416		)
Basic net loss attributable to common shareholders	(28,910		)	(32,887		)	(95,490		)	(15,965		)
Noncontrolling interest in earnings of common unitholders	—			—			—			—
Diluted net loss attributable to common shareholders	$	(28,910	)	$	(32,887	)	$	(95,490	)	$	(15,965	)
Weighted average number of common shares outstanding	270,289			252,802			265,153			252,618
Weighted average Limited Partner Units outstanding	—			—			—			—
Other potential dilutive shares	—			—			—			—
Weighted average number of common shares and potential dilutive securities	270,289			252,802			265,153			252,618
Partnership
Net loss attributable to common unitholders	$	(28,689	)	$	(32,944	)	$	(94,838	)	$	(13,918	)
Less: Distributions on participating securities	(680		)	(811		)	(2,388		)	(2,416		)
Basic and diluted net loss attributable to common unitholders	$	(29,369	)	$	(33,755	)	$	(97,226	)	$	(16,334	)
Weighted average number of Common Units outstanding	274,800			259,866			270,095			259,505
Other potential dilutive units	—			—			—			—
Weighted average number of Common Units and potential dilutive securities	274,800			259,866			270,095			259,505

The Limited Partner Units are anti-dilutive to the General Partner for the three and nine months ended September 30, 2012 and 2011, as a result of the net loss for these periods. In addition, substantially all potential shares related to our stock-based compensation plans were anti-dilutive for all periods presented and potential shares related to our 3.75% Exchangeable Senior Notes (“Exchangeable Notes”), which were repaid in December 2011, were anti-dilutive for the three and nine months ended September 30,2011. 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,
	2012			2011			2012			2011
General Partner
Noncontrolling interest in loss of common unitholders	$	(459	)	$	(868	)	$	(1,736	)	$	(369	)
Weighted average Limited Partner Units outstanding	4,511			7,064			4,942			6,887
General Partner and the Partnership
Other potential dilutive shares or units:
Anti-dilutive outstanding potential shares or units under fixed stock option and other stock-based compensation plans	1,763			1,677			1,763			1,677
Anti-dilutive potential shares or units under the Exchangeable Notes	—			3,432			—			3,432
Outstanding participating securities	4,045			4,840			4,045			4,840

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Shareholders' Equity

9 Months Ended

Sep. 30, 2012

Stockholders' Equity Note [Abstract]

Shareholders' Equity

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

General Partner

In March 2012, we redeemed all of the outstanding shares of our 6.95% Series M Cumulative Redeemable Preferred Shares at their liquidation amount of $168.3 million. Original offering costs of $5.7 million were included as a reduction to net loss attributable to common shareholders in conjunction with the redemption of these shares.

In the first nine months of 2012, we issued 16.9 million shares of common stock pursuant to our at the market offerings, generating gross proceeds of approximately $241.5 million and, after considering commissions and other costs, net proceeds of approximately $236.3 million. We paid $4.8 million in commissions related to the sale of these common shares. The proceeds from these offerings were used for acquisitions, general corporate purposes and redemption of preferred shares and fixed rate secured debt.

Partnership

For each share of common stock or preferred stock 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 shares of its common stock or preferred stock, the Partnership redeems the corresponding Common Units or Preferred Units held by the General Partner at the same price.

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Related Party Transactions

9 Months Ended

Sep. 30, 2012

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 we 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, 2012 and 2011, respectively (in thousands): 

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2012		2011		2012		2011
Management fees	$	2,796	$	2,770	$	8,251	$	7,393
Leasing fees	622		826		2,856		3,627
Construction and development fees	1,860		1,786		3,615		4,182

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Segment Reporting

9 Months Ended

Sep. 30, 2012

Segment Reporting [Abstract]

Segment Reporting

Segment Reporting

We have four reportable operating segments at September 30, 2012, 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.

During 2012, one of the quantitative thresholds was triggered, which required our medical office property operating segment to be presented as a separate reportable segment. As such, our medical office properties are presented as a separate reportable segment for the three and nine months ended September 30, 2012, as well as for the comparative prior periods.

Other revenue consists of other operating revenues not identified with one of our operating segments. Interest expense and other non-property specific revenues and expenses are not allocated to individual segments in determining our performance measure.

We assess and measure our overall operating results based upon an industry performance measure referred to as Funds From Operations (“FFO”), which management believes is a useful indicator of our 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.

We do not allocate certain income and expenses (“Non-Segment Items”, as shown in the table below) to our operating segments. 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, 2012 and 2011, respectively (in thousands): 

	Three Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
Revenues
Rental Operations:
Industrial	$	109,400	$	95,676	$	327,713	$	281,083
Office	67,701		66,157		201,606		207,387
Medical Office	23,007		14,292		64,669		41,280
Non-reportable Rental Operations	4,695		5,485		16,067		16,783
General contractor and service fee revenue (“Service Operations”)	93,932		127,708		226,507		409,617
Total Segment Revenues	298,735		309,318		836,562		956,150

Other Revenue	4,154			2,971			6,396			8,219
Consolidated Revenue from continuing operations	302,889			312,289			842,958			964,369
Discontinued Operations	143			50,315			2,987			151,373
Consolidated Revenue	$	303,032		$	362,604		$	845,945		$	1,115,742
Reconciliation of Funds From Operations
Net earnings excluding depreciation and Non-Segment Items
Industrial	$	81,165		$	70,214		$	244,651		$	203,854
Office	38,302			38,271			117,367			120,999
Medical Office	14,851			8,797			42,344			25,121
Non-reportable Rental Operations	3,026			3,905			11,238			12,232
Service Operations	6,213			7,161			16,988			30,437
	143,557			128,348			432,588			392,643
Non-Segment Items:
Interest expense	(61,539		)	(54,528		)	(183,623		)	(161,765		)
Interest and other income	150			172			394			543
Other operating expenses	(130		)	(60		)	(591		)	(171		)
General and administrative expenses	(8,934		)	(9,493		)	(32,367		)	(29,231		)
Undeveloped land carrying costs	(2,140		)	(2,259		)	(6,606		)	(7,021		)
Acquisition-related activity	(954		)	(342		)	(2,563		)	(1,525		)
Income tax benefit	103			194			103			194
Other non-segment income	3,278			1,934			4,119			4,456
Net (income) loss attributable to noncontrolling interests - consolidated entities not wholly owned by the Partnership	(59		)	(43		)	(365		)	163
Joint venture items	8,997			11,635			27,999			30,597
Dividends on preferred shares/Preferred Units	(11,081		)	(14,399		)	(35,356		)	(46,347		)
Adjustments for redemption/repurchase of preferred shares/Preferred Units	—			(3,633		)	(5,730		)	(3,796		)
Discontinued operations	(92		)	14,745			17			41,163
FFO of Partnership attributable to common unitholders	71,156			72,271			198,019			219,903
Net loss attributable to noncontrolling interests - common limited partnership interests in the Partnership	459			868			1,736			369
Noncontrolling interest share of FFO adjustments	(1,638		)	(2,835		)	(5,358		)	(6,206		)
FFO of General Partner attributable to common shareholders	69,977			70,304			194,397			214,066
Depreciation and amortization on continuing operations	(95,117		)	(81,068		)	(279,136		)	(242,043		)
Depreciation and amortization on discontinued operations	(22		)	(16,267		)	(1,202		)	(50,386		)
Company’s share of joint venture adjustments	(8,782		)	(8,531		)	(26,008		)	(24,798		)
Earnings from depreciated property sales on continuing operations	403			(1,437		)	245			66,910
Earnings from depreciated property sales on discontinued operations	1,608			2,088			11,179			16,405
Earnings from depreciated property sales - share of joint venture	2,065			—			2,065			91
Noncontrolling interest share of FFO adjustments	1,638			2,835			5,358			6,206
Net loss of General Partner attributable to common shareholders	$	(28,230	)	$	(32,076	)	$	(93,102	)	$	(13,549	)
Add back: Net loss attributable to noncontrolling interests - common limited partnership interests in the Partnership	(459		)	(868		)	(1,736		)	(369		)
Net loss of Partnership attributable to common unitholders	$	(28,689	)	$	(32,944	)	$	(94,838	)	$	(13,918	)

The assets for each of the reportable segments as of September 30, 2012 and December 31, 2011 are as follows (in thousands):

	September 30, 2012		December 31, 2011
Assets
Rental Operations:
Industrial	$	3,753,022	$	3,586,250
Office	1,676,389		1,742,196
Medical Office	820,898		580,177
Non-reportable Rental Operations	180,998		209,056
Service Operations	161,953		167,382
Total Segment Assets	6,593,260		6,285,061
Non-Segment Assets - Partnership	596,857		718,921
Consolidated Assets - Partnership	$	7,190,117	$	7,003,982
Non-Segment Assets - General Partner	—		455
Consolidated Assets - General Partner	$	7,190,117	$	7,004,437

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Indebtedness (Unsecured Lines of Credit) (Details) (USD $)	9 Months Ended			1 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Jul. 31, 2012	Jul. 31, 2012 Unsecured Line of Credit - Consolidated Subsidiary [Member]	Sep. 30, 2012 Line of Credit [Member]
Borrowing capacity of unsecured lines of credit				$ 30,000,000	$ 850,000,000
Maturity date					Dec. 31, 2015
Line of credit balance					0
Line of Credit Facility, Increase, Additional Borrowings					400,000,000
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.
Debt Instrument, Basis Spread on Variable Rate			0.85%		1.25%
Borrowings (payments) on lines of credit, net	$ (20,293,000)	$ 111,247,000		$ 20,300,000

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Indebtedness (Tables)

9 Months Ended

Sep. 30, 2012

Debt Disclosure [Abstract]

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

	Book Value at 12/31/11		Book Value at 9/30/12		Fair Value at 12/31/11		Issuances and Assumptions		Payments/Payoffs			Adjustments to Fair Value		Fair Value at 9/30/12
Fixed rate secured debt	$	1,167,188	$	1,077,991	$	1,256,331	$	18,741	$	(106,355	)	$	6,147	$	1,174,864
Variable rate secured debt	6,045		18,464		6,045		13,305		(885		)	499		18,964
Unsecured notes	2,616,063		3,043,690		2,834,610		600,000		(172,374		)	150,385		3,412,621
Unsecured lines of credit	20,293		—		20,244		—		(20,293		)	49		—
Total	$	3,809,589	$	4,140,145	$	4,117,230	$	632,046	$	(299,907	)	$	157,080	$	4,606,449

Unsecured Lines of Credit

Description	Maximum Capacity		Maturity Date	Outstanding Balance at September 30, 2012
Unsecured Line of Credit - Partnership	$	850,000	December 2015	$	—

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Subsequent Events (Tables)

9 Months Ended

Sep. 30, 2012

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, 2012	November 30, 2012
Preferred (per depositary share or unit):
Series J	$0.414063	November 14, 2012	November 30, 2012
Series K	$0.406250	November 14, 2012	November 30, 2012
Series L	$0.412500	November 14, 2012	November 30, 2012
Series O	$0.523437	December 17, 2012	December 31, 2012

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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, 2012 buildings	Dec. 31, 2011 buildings
Number of properties sold in discontinued operations	21	101
Total number of properties in discontinued operations	122
Office [Member]
Number of properties sold in discontinued operations	9	93
Total number of properties in discontinued operations	102
Industrial [Member]
Number of properties sold in discontinued operations	11	7
Total number of properties in discontinued operations	18
Retail [Member]
Number of properties sold in discontinued operations	1	1
Total number of properties in discontinued operations	2

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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities:
Net income (loss)	$ (53,387)	$ 36,062
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	193,479	204,134
Amortization of deferred leasing and other costs	86,859	88,295
Amortization of deferred financing costs	9,878	11,070
Straight-line rent adjustment	(15,725)	(19,012)
Earnings from land and depreciated property sales	(11,424)	(83,315)
Third-party construction contracts, net	(4,295)	(18,417)
Other accrued revenues and expenses, net	(14,621)	14,586
Operating distributions received in excess of equity in earnings from unconsolidated companies	10,772	11,681
Net cash provided by operating activities	201,536	245,084
Cash flows from investing activities:
Development of real estate investments	(176,340)	(125,676)
Acquisition of real estate investments and related intangible assets	(321,099)	(179,047)
Acquisition of undeveloped land	(37,166)	(3,825)
Second generation tenant improvements, leasing costs and building improvements	(46,682)	(71,732)
Other deferred leasing costs	(22,727)	(20,950)
Other assets	674	(4,500)
Proceeds from land and depreciated property sales, net	112,559	504,688
Capital distributions from unconsolidated companies	4,890	54,730
Capital contributions and advances to unconsolidated companies, net	(19,262)	(28,362)
Net cash provided by (used for) investing activities	(505,153)	125,326
Cash flows from financing activities:
Proceeds from issuance of common shares, net	236,301	0
Payments for redemption/repurchase of preferred shares/units	(168,272)	(110,726)
Proceeds from unsecured debt issuance	600,000	0
Payments on and repurchases of unsecured debt	(172,374)	(166,346)
Proceeds from secured debt financings	13,305	0
Payments on secured indebtedness including principal amortization	(107,240)	(24,841)
Borrowings (payments) on lines of credit, net	(20,293)	111,247
Dividends/Distributions to common shareholders/unitholders	(135,083)	(128,817)
Dividends/Distributions to preferred shareholders/unitholders	(31,630)	(46,347)
Contributions from (distributions to) noncontrolling interests, net	2,788	(3,952)
Buyout of noncontrolling interests	(6,208)	0
Deferred financing costs	(8,334)	(2,830)
Net cash provided by (used for) financing activities	202,960	(372,612)
Net increase (decrease) in cash and cash equivalents	(100,657)	(2,202)
Cash and cash equivalents at beginning of period	213,809	18,384
Cash and cash equivalents at end of period	113,152	16,182
Noncash investing and financing activities:
Assumption of indebtedness and other liabilities in real estate acquisitions	19,992	150,042
Contribution of properties to unconsolidated companies	0	53,245
Investments and advances related to acquisition of previously unconsolidated companies	0	5,987
Conversion of Limited Partner Units to common shares	29,002	3,052
Issuance of Limited Partner Units for acquistion	0	28,357
Preferred distributions declared but not paid	3,726	0
Subsidiary of Common Parent [Member]
Cash flows from operating activities:
Net income (loss)	(53,387)	36,062
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	193,479	204,134
Amortization of deferred leasing and other costs	86,859	88,295
Amortization of deferred financing costs	9,878	11,070
Straight-line rent adjustment	(15,725)	(19,012)
Earnings from land and depreciated property sales	(11,424)	(83,315)
Third-party construction contracts, net	(4,295)	(18,417)
Other accrued revenues and expenses, net	(14,582)	14,588
Operating distributions received in excess of equity in earnings from unconsolidated companies	10,772	11,681
Net cash provided by operating activities	201,575	245,086
Cash flows from investing activities:
Development of real estate investments	(176,340)	(125,676)
Acquisition of real estate investments and related intangible assets	(321,099)	(179,047)
Acquisition of undeveloped land	(37,166)	(3,825)
Second generation tenant improvements, leasing costs and building improvements	(46,682)	(71,732)
Other deferred leasing costs	(22,727)	(20,950)
Other assets	674	(4,500)
Proceeds from land and depreciated property sales, net	112,559	504,688
Capital distributions from unconsolidated companies	4,890	54,730
Capital contributions and advances to unconsolidated companies, net	(19,262)	(28,362)
Net cash provided by (used for) investing activities	(505,153)	125,326
Cash flows from financing activities:
Contributions from the General Partner	236,301	0
Payments for redemption/repurchase of preferred shares/units	(168,272)	(110,726)
Proceeds from unsecured debt issuance	600,000	0
Payments on and repurchases of unsecured debt	(172,374)	(166,346)
Proceeds from secured debt financings	13,305	0
Payments on secured indebtedness including principal amortization	(107,240)	(24,841)
Borrowings (payments) on lines of credit, net	(20,293)	111,247
Dividends/Distributions to common shareholders/unitholders	(137,662)	(132,423)
Dividends/Distributions to preferred shareholders/unitholders	(31,630)	(46,347)
Contributions from (distributions to) noncontrolling interests, net	5,311	(408)
Buyout of noncontrolling interests	(6,208)	0
Deferred financing costs	(8,334)	(2,830)
Net cash provided by (used for) financing activities	202,904	(372,674)
Net increase (decrease) in cash and cash equivalents	(100,674)	(2,262)
Cash and cash equivalents at beginning of period	213,826	18,419
Cash and cash equivalents at end of period	113,152	16,157
Noncash investing and financing activities:
Assumption of indebtedness and other liabilities in real estate acquisitions	19,992	150,042
Contribution of properties to unconsolidated companies	0	53,245
Investments and advances related to acquisition of previously unconsolidated companies	0	5,987
Conversion of Limited Partner Units to common shares	29,002	3,052
Issuance of Limited Partner Units for acquistion	0	28,357
Preferred distributions declared but not paid	$ 3,726	$ 0

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Variable Interest Entities

9 Months Ended

Sep. 30, 2012

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

Consolidation Policy for VIEs

Variable Interest Entities

During the third quarter of 2012, an unconsolidated venture that was previously determined to be a VIE sold its sole property, retired its outstanding debt and distributed substantially all of its remaining assets.

During the second quarter of 2012, an event took place within one of our unconsolidated joint ventures that required us to re-evaluate our previous conclusions that this joint venture was not a variable interest entity (“VIE”). Upon such reconsideration, we determined that the fair value of the total equity investment at risk was not sufficient to meet the overall capital requirements of the joint venture, and we therefore concluded that this venture now meets the applicable criteria to be considered a VIE. However, for the reasons described below, we have determined there is no individual primary beneficiary for this joint venture.

After the aforementioned reconsideration events, there are three unconsolidated joint ventures at September 30, 2012 that we have determined meet the criteria to be considered 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 as of September 30, 2012 (in millions):

	Carrying Value			Maximum Loss Exposure
Investment in Unconsolidated Companies	$	55.1		$	55.1
Guarantee Obligations (1)	$	(24.3	)	$	(145.8	)

(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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General Basis of Presentation (Details)	9 Months Ended
	Sep. 30, 2012
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest	98.40%
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest	1.60%

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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, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net Income (Loss) Attributable to Noncontrolling Interest, Operating Partnerships	$ 0	$ 0	$ 0	$ 0
Weighted Average Limited Partnership Units Outstanding	0	0	0	0
Three Point Seven Five Percent Exchangeable Senior Notes [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.75%		3.75%
Anti-dilutive securities	0	3,432	0	3,432
Anti-Dilutive [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net Income (Loss) Attributable to Noncontrolling Interest, Operating Partnerships	$ (459)	$ (868)	$ (1,736)	$ (369)
Weighted Average Limited Partnership Units Outstanding	4,511	7,064	4,942	6,887
Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities	1,763	1,677	1,763	1,677
Participating Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities	4,045	4,840	4,045	4,840

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Acquisitions and Dispositions (Tables)

9 Months Ended

Sep. 30, 2012

Summary of Significant Assumptions Utilized in Estimates

	Low		High
Discount rate	7.19	%	8.78	%
Exit capitalization rate	5.75	%	7.40	%
Lease-up period (months)	9		19
Net rental rate per square foot – Industrial	$2.75		$7.62
Net rental rate per square foot – Medical Office	$16.00		$26.14

Other 2012 Acquisitions [Member] [Domain]

Summary of Allocation of Fair Value of Amounts Recognized

Real estate assets	$	292,754
Lease related intangible assets	50,468
Other assets	2,829
Total acquired assets	346,051
Secured debt	18,741
Other liabilities	1,251
Total assumed liabilities	19,992
Fair value of acquired net assets	$	326,059