First Industrial 10-Q 4 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013
Entity Information [Line Items]	'
Entity Registrant Name	'FIRST INDUSTRIAL LP
Entity Central Index Key	'0001033128
Trading Symbol	'FRFI
Current Fiscal Year End Date	'--12-31
Entity Filer Category	'Accelerated Filer
Document Type	'10-Q
Document Period End Date	30-Sep-13
Document Fiscal Year Focus	'2013
Document Fiscal Period Focus	'Q3
Entity Current Reporting Status	'Yes
Amendment Flag	'false
Entity Common Stock, Shares Outstanding	0

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Investment in Real Estate:	'	'
Land	$617,037	$598,404
Buildings and Improvements	2,136,653	2,146,375
Construction in Progress	32,248	19,228
Less: Accumulated Depreciation	-665,688	-639,481
Net Investment in Real Estate	2,120,250	2,124,526
Real Estate and Other Assets Held for Sale, Net of Accumulated Depreciation and Amortization of $658 and $3,050	2,291	6,765
Investments in and Advances to Other Real Estate Partnerships	196,276	178,104
Cash and Cash Equivalents	6,133	4,357
Tenant Accounts Receivable, Net	3,910	3,867
Investments in Joint Ventures	1,163	1,012
Deferred Rent Receivable, Net	49,595	47,930
Deferred Financing Costs, Net	11,355	10,948
Deferred Leasing Intangibles, Net	23,566	29,374
Prepaid Expenses and Other Assets, Net	97,891	96,999
Total Assets	2,512,430	2,503,882
Indebtedness:	'	'
Mortgage Loans Payable, Net	614,900	656,329
Senior Unsecured Notes, Net	445,515	474,150
Unsecured Credit Facility	171,000	98,000
Accounts Payable, Accrued Expenses and Other Liabilities	64,487	78,876
Deferred Leasing Intangibles, Net	12,016	13,597
Rents Received in Advance and Security Deposits	27,767	27,327
Distributions Payable	9,788	452
Total Liabilities	1,345,473	1,348,731
Commitments and Contingencies	0	0
Partners’ Capital:	'	'
General Partner Preferred Units	73,587	217,971
General Partner Units (109,975,850 and 98,767,913 units outstanding)	1,014,905	859,727
Limited Partners Units (4,602,833 and 4,702,341 units outstanding)	82,400	84,282
Accumulated Other Comprehensive Loss	-3,935	-6,829
Total Partners’ Capital	1,166,957	1,155,151
Total Liabilities and Partners’ Capital	$2,512,430	$2,503,882

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified
Real Estate and Other Assets Held for Sale, Accumulated Depreciation and Amortization	$658	$3,050
General Partner Units Outstanding	109,975,850	98,767,913
Limited Partners Units Outstanding	4,602,833	4,702,341

CONSOLIDATED_STATEMENTS_OF_OPE

CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues:	'	'	'	'
Rental Income	$57,423	$54,549	$170,302	$163,013
Tenant Recoveries and Other Income	16,080	14,661	50,824	46,583
Total Revenues	73,503	69,210	221,126	209,596
Expenses:	'	'	'	'
Property Expenses	23,863	21,819	72,914	67,320
General and Administrative	5,131	4,841	16,975	16,316
Impairment of Real Estate	1,047	0	2,476	-85
Depreciation and Other Amortization	25,533	25,201	75,671	78,250
Total Expenses	55,574	51,861	168,036	161,801
Other Income (Expense):	'	'	'	'
Interest Income	611	676	1,818	2,319
Interest Expense	-16,918	-18,644	-51,850	-59,548
Amortization of Deferred Financing Costs	-736	-815	-2,326	-2,437
Mark-to-Market (Loss) Gain on Interest Rate Protection Agreements	0	-29	52	-334
Loss from Retirement of Debt	-662	-424	-6,034	-6,646
Total Other Income (Expense)	-17,705	-19,236	-58,340	-66,646
Income (Loss) from Continuing Operations Before Equity in Income of Other Real Estate Partnerships, Equity in Income of Joint Ventures, Gain on Change in Control of Interests and Income Tax (Provision) Benefit	224	-1,887	-5,250	-18,851
Equity in Income of Other Real Estate Partnerships	4,546	1,946	9,117	5,512
Equity in Income of Joint Ventures	72	28	119	156
Gain on Change in Control of Interests	0	0	0	776
Income Tax (Provision) Benefit	-63	5	-4	-5,258
Income (Loss) from Continuing Operations	4,779	92	3,982	-17,665
Discontinued Operations:	'	'	'	'
Income Attributable to Discontinued Operations	125	854	518	1,757
Gain on Sale of Real Estate	3,613	4,470	14,020	12,084
Income from Discontinued Operations	3,738	5,324	14,538	13,841
Income (Loss) Before Gain on Sale of Real Estate	8,517	5,416	18,520	-3,824
Gain on Sale of Real Estate	221	3,777	483	3,777
Net Income (Loss)	8,738	9,193	19,003	-47
Less: Preferred Unit Distributions	-1,392	-4,725	-7,506	-14,285
Less: Redemption of Preferred Units	-2,121	0	-5,667	0
Net Income (Loss) Available to Unitholders and Participating Securities	5,225	4,468	5,830	-14,332
Basic and Diluted Earnings Per Unit:	'	'	'	'
Income (Loss) from Continuing Operations Available to Unitholders	$0.01	($0.01)	($0.08)	($0.30)
Income from Discontinued Operations Attributable to Unitholders	$0.03	$0.05	$0.13	$0.15
Net Income (Loss) Available to Unitholders	$0.04	$0.04	$0.05	($0.15)
Distributions Per Unit	$0.09	$0	$0.26	$0
Weighted Average Units — Basic	114,089	98,432	110,823	94,464
Weighted Average Number of Shares Outstanding, Diluted	114,404	98,432	110,823	94,464
Net Income (Loss) Available to Unitholders Attributable to:	'	'	'	'
General Partner	5,006	4,191	5,586	-13,564
Limited Partners	219	277	244	-768
Net Income (Loss) Available to Unitholders and Participating Securities	$5,225	$4,468	$5,830	($14,332)

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Other Comprehensive Income [Abstract]	'	'	'	'
Net Income (Loss)	$8,738	$9,193	$19,003	($47)
Amortization of Interest Rate Protection Agreements	609	579	1,792	1,690
Write-off of Unamortized Settlement Amounts of Interest Rate Protection Agreements	17	0	1,116	2,619
Foreign Currency Translation Adjustment	30	54	-14	51
Comprehensive Income	$9,394	$9,826	$21,897	$4,313

CONSOLIDATED_STATEMENT_OF_CHAN

CONSOLIDATED STATEMENT OF CHANGES IN PARTNERS CAPITAL (USD $)	Total	General Partner Preferred Units	General Partner Units	Limited Partner Units	Accumulated Other Comprehensive Loss
In Thousands, unless otherwise specified
Balance at Dec. 31, 2012	$1,155,151	$217,971	$859,727	$84,282	($6,829)
Increase (Decrease) in Partners' Capital [Roll Forward]	'	'	'	'	'
Issuance of General Partner Units, Net of Issuance Costs	173,785	'	173,785	'	'
Redemption of Preferred Units	-144,384	-144,384	'	'	'
Stock Based Compensation Activity	2,755	'	2,755	'	'
Conversion of Limited Partner Units to General Partner Units	0	'	943	-943	'
Common Unit Distributions	-29,074	'	-27,891	-1,183	'
Preferred Unit Distributions	-13,173	-13,173	'	'	'
Net Income	19,003	13,173	5,586	244	'
Other Comprehensive Income	2,894	'	'	'	2,894
Balance at Sep. 30, 2013	$1,166,957	$73,587	$1,014,905	$82,400	($3,935)

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'
Net Income (Loss)	$19,003	($47)
Adjustments to Reconcile Net Income (Loss) to Net Cash Provided by Operating Activities:	'	'
Depreciation	62,643	66,633
Amortization of Deferred Financing Costs	2,326	2,437
Other Amortization	21,241	22,074
Impairment of Real Estate	2,652	1,101
Provision for Bad Debt	656	592
Equity in Income of Joint Ventures	-119	-156
Distributions from Joint Ventures	0	27
Gain on Sale of Real Estate	-14,503	-15,861
Gain on Change in Control of Interests	0	-776
Loss from Retirement of Debt	6,034	6,646
Mark-to-Market (Gain) Loss on Interest Rate Protection Agreements	-52	334
Equity in Income of Other Real Estate Partnerships	-9,117	-5,512
Distributions from Investment in Other Real Estate Partnerships	9,117	5,512
(Increase) Decrease in Tenant Accounts Receivable, Prepaid Expenses and Other Assets, Net	-3,764	2,128
Increase in Deferred Rent Receivable	-2,963	-2,376
Decrease in Accounts Payable, Accrued Expenses, Other Liabilities, Rents Received in Advance and Security Deposits	-9,391	-2,193
Payments of Premiums, Discounts and Prepayment Penalties Associated with Retirement of Debt	-4,513	-4,059
Net Cash Provided by Operating Activities	79,250	76,504
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'
Acquisitions of Real Estate	-47,293	-48,519
Additions to Investment in Real Estate and Non-Acquisition Tenant Improvements and Lease Costs	-65,591	-51,378
Net Proceeds from Sales of Investments in Real Estate	62,084	75,789
Investments in and Advances to Other Real Estate Partnerships	-40,355	-22,921
Distributions from Other Real Estate Partnerships in Excess of Equity in Income	22,183	30,204
Contributions to and Investments in Joint Ventures	-26	-184
Repayments of Notes Receivable	454	14,226
Increase in Escrows	-189	0
Net Cash Used in Investing Activities	-68,733	-2,783
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'
Debt and Equity Issuance Costs	-3,567	-1,433
Unit Contributions	174,081	134,905
Repurchase and Retirement of Restricted Units	-2,968	-855
Common Unit Distributions	-19,286	0
Preferred Unit Distributions Paid	-7,958	-13,871
Redemption of Preferred Units	-150,000	0
Payments on Interest Rate Swap Agreement	-865	-819
Proceeds from Origination of Mortgage Loans Payable	0	97,561
Repayments on Mortgage and Other Loans Payable	-41,389	-20,197
Repayments of Senior Unsecured Notes	-29,769	-152,170
Proceeds from Unsecured Credit Facility	289,000	261,000
Repayments on Unsecured Credit Facility	-216,000	-383,000
Net Cash Used in Financing Activities	-8,721	-78,879
Net Effect of Exchange Rate Changes on Cash and Cash Equivalents	-20	14
Net Increase (Decrease) in Cash and Cash Equivalents	1,796	-5,158
Cash and Cash Equivalents, Beginning of Year	4,357	7,624
Cash and Cash Equivalents, End of Year	$6,133	$2,480

Organization_and_Formation_of_

Organization and Formation of Partnership	9 Months Ended
	Sep. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Organization and Formation of Partnership	'
	1. Organization and Formation of Partnership
	First Industrial, L.P. (the "Operating Partnership") was organized as a limited partnership in the state of Delaware on November 23, 1993. The sole general partner is First Industrial Realty Trust, Inc. (the "Company") which owns common units in the Operating Partnership ("Units") representing an approximate 96.0% common ownership interest at September 30, 2013. The Company also owns a preferred general partnership interest in the Operating Partnership represented by preferred Units ("Preferred Units") with an aggregate liquidation priority of $75,000 at September 30, 2013. The Company is a real estate investment trust ("REIT") as defined in the Internal Revenue Code of 1986 (the "Code"). The Company’s operations are conducted primarily through the Operating Partnership. The limited partners of the Operating Partnership owned, in the aggregate, approximately a 4.0% interest in the Operating Partnership at September 30, 2013. Operations are also conducted through other partnerships and limited liability companies ("LLCs") of which the Operating Partnership is the sole member, and taxable REIT subsidiaries (together with the Operating Partnership, other partnerships and the L.L.C.s, the "Consolidated Operating Partnership"), the operating data of which is consolidated with that of the Operating Partnership as presented herein. Unless the context otherwise requires, the terms "we," "us," and "our" refer to First Industrial, L.P. and its controlled subsidiaries.
	We also hold at least a 99% limited partnership interest in each of eight limited partnerships (together, the "Other Real Estate Partnerships").
	We also own noncontrolling equity interests in, and provide various services to, two joint ventures (the "2003 Net Lease Joint Venture" and the "2007 Europe Joint Venture" collectively, the "Joint Ventures"). See Note 5 for more information on the Joint Ventures.
	The general partners of the Other Real Estate Partnerships are separate corporations, each with at least a .01% general partnership interest in the Other Real Estate Partnership for which it acts as a general partner. Each general partner of the Other Real Estate Partnerships is a wholly-owned subsidiary of the Company.
	As of September 30, 2013, we owned 632 industrial properties located in 24 states, containing an aggregate of approximately 55.1 million square feet of gross leasable area ("GLA"). On a combined basis, as of September 30, 2013, the Other Real Estate Partnerships owned 65 industrial properties containing an aggregate of approximately 7.4 million square feet of GLA.
	Profits, losses and distributions of us, the LLCs and Other Real Estate Partnerships are allocated to the general partner and the limited partners or the members, as applicable, in accordance with the provisions contained within the partnership agreements, operating agreements or other ownership agreements, as applicable.
	The Other Real Estate Partnerships and the Joint Ventures are accounted for under the equity method of accounting. Accordingly, the operating data of the Other Real Estate Partnerships and the Joint Ventures are not consolidated with that of the Consolidated Operating Partnership as presented herein.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Summary of Significant Accounting Policies	'
	2. Summary of Significant Accounting Policies
	The accompanying unaudited interim consolidated financial statements have been prepared in accordance with the accounting policies described in the consolidated financial statements and related notes included in our Annual Report on Form 10-K for the year ended December 31, 2012 ("2012 Form 10-K") and should be read in conjunction with such consolidated financial statements and related notes. The 2012 year end consolidated balance sheet data included in this Form 10-Q filing was derived from the audited consolidated financial statements in our 2012 Form 10-K, but does not include all disclosures required by accounting principles generally accepted in the United States of America ("GAAP"). The following notes to these interim consolidated financial statements highlight significant changes to the notes included in the December 31, 2012 audited consolidated financial statements included in our 2012 Form 10-K and present interim disclosures as required by the Securities and Exchange Commission. In order to conform with GAAP, in preparation of our consolidated financial statements we are required to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of September 30, 2013 and December 31, 2012, and the reported amounts of revenues and expenses for the three and nine months ended September 30, 2013 and 2012. Actual results could differ from those estimates. In our opinion, the accompanying unaudited interim consolidated financial statements reflect all adjustments necessary for a fair statement of our financial position as of September 30, 2013 and December 31, 2012, and the results of our operations and comprehensive income for each of the three and nine months ended September 30, 2013 and 2012, and our cash flows for each of the nine months ended September 30, 2013 and 2012, and all adjustments are of a normal recurring nature.
	Reclassifications
	Certain reclassifications have been made to the 2012 financial statements to conform to the 2013 presentation. Additionally, the results of operations for the nine months ended September 30, 2013 include an adjustment of $1,561 to decrease depreciation and amortization expense which should have been recorded during previous periods. Management evaluated the impact of the adjustment and does not believe it is material to the results of the anticipated full year, current period or any previous period.
	IRS Tax Refund
	On August 24, 2009, we received a private letter ruling from the IRS granting favorable loss treatment under Sections 331 and 336 of the Code on the tax liquidation of one of our former taxable REIT subsidiaries. On November 6, 2009, legislation was signed that allowed businesses with net operating losses for 2008 or 2009 to carry back those losses for up to five years. As a result, we received a refund from the IRS of $40,418 in the fourth quarter of 2009 (the "Refund") in connection with this tax liquidation. The IRS examination team, which is required by statute to review all refund claims in excess of $2,000 on behalf of the Joint Committee on Taxation, indicated to us that it disagreed with certain of the property valuations we obtained from an independent valuation expert in support of our fair value of the liquidated taxable REIT subsidiary and our claim for the Refund. During the year ended December 31, 2012, we reached an agreement with the regional office of the IRS on a proposed adjustment to the Refund. The total agreed-upon adjustment to taxable income was $13,700, which equates to $4,806 of taxes owed. We were also required to pay accrued interest of approximately $500. During the year ended December 31, 2012, the Operating Partnership recorded the charge for the agreed-upon adjustment and the related estimated accrued interest which was reflected as a component of income tax expense. During 2013, the settlement amount was approved by the Joint Committee on Taxation. During the nine months ended September 30, 2013, we paid the agreed upon taxes and related accrued interest.
	As a result of the Joint Committee on Taxation's approval, during 2013, we entered into closing agreements with the IRS that determined the timing of the settlement on the tax characterization of the limited partners of the Operating Partnership and the stockholders of the Company. Pursuant to these closing agreements, $8,238 of the preferred stock distributions for the year ended December 31, 2012 are taxable as capital gain.
	Recent Accounting Pronouncements
	In February 2013, the FASB issued Accounting Standards Update No. 2013-02, "Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income" ("ASU 2013-02"). ASU 2013-02 requires that public companies present, either in a single note or parenthetically on the face of the financial statements, the effect of significant amounts reclassified from each component of accumulated other comprehensive income based on its source and the income statement line items affected by the reclassification. ASU 2013-02 is effective for annual periods beginning after December 15, 2012, and is to be applied prospectively. The adoption of this guidance did not have a material impact on our consolidated financial statements.

Investment_in_Real_Estate

Investment in Real Estate	9 Months Ended
	Sep. 30, 2013
Investment in Real Estate [Abstract]	'
Investment in Real Estate	'
	3. Investment in Real Estate
	Acquisitions
	During the nine months ended September 30, 2013, we acquired one industrial property comprising approximately 0.5 million square feet of GLA and several land parcels. The purchase price of these acquisitions totaled approximately $46,463, excluding costs incurred in conjunction with the acquisition of the industrial property and land parcels.
	Sales and Discontinued Operations
	During the nine months ended September 30, 2013, we sold 18 industrial properties comprising approximately 1.5 million square feet of GLA and several land parcels. Gross proceeds from the sales of the industrial properties and land parcels were approximately $64,920. The net gain on the sale of the industrial properties and land parcels was approximately $14,503. The 18 sold industrial properties meet the criteria to be included in discontinued operations. Therefore the results of operations and net gain on sale of real estate for the 18 industrial properties sold are included in discontinued operations. The results of operations and gain on sale of real estate for the several land parcels, which do not meet the criteria to be included in discontinued operations, are included in continuing operations.
	At September 30, 2013, we had one industrial property comprising approximately 0.05 million square feet of GLA held for sale. The results of operations of this industrial property held for sale at September 30, 2013 are included in discontinued operations. There can be no assurance that such industrial property held for sale will be sold.
	Income from discontinued operations for the nine months ended September 30, 2012 reflects the results of operations of the 18 industrial properties that were sold during the nine months ended September 30, 2013, the results of operations of 26 industrial properties that were sold during the year ended December 31, 2012, the results of operations of the one industrial property identified as held for sale at September 30, 2013 and the gain on sale of real estate relating to 23 industrial properties that were sold during the nine months ended September 30, 2012.
	The following table discloses certain information regarding the industrial properties included in discontinued operations for the three and nine months ended September 30, 2013 and 2012:
		Three Months			Three Months				Nine Months				Nine Months
		Ended			Ended				Ended				Ended
		September 30,			September 30,				September 30,				September 30,
		2013			2012				2013				2012
	Total Revenues	$	116		$	3,081			$	2,311			$	11,449
	Property Expenses	58			(1,241		)		(871		)		(4,749		)
	Impairment of Real Estate	—			—				(176		)		(1,186		)
	Depreciation and Amortization	(49		)	(986		)		(746		)		(3,757		)
	Gain on Sale of Real Estate	3,613			4,470				14,020				12,084
	Income from Discontinued Operations	$	3,738		$	5,324			$	14,538			$	13,841
	At September 30, 2013 and December 31, 2012, we had notes receivable outstanding of approximately $40,795 and $41,201, net of a discount of $207 and $255, respectively, which are included as a component of Prepaid Expenses and Other Assets, Net. At September 30, 2013 and December 31, 2012, the fair value of the notes receivable was $41,906 and $44,783, respectively. The fair value of our notes receivable was determined by discounting the future cash flows using current rates at which similar notes with similar remaining maturities would be made to other borrowers. The current market rates we utilized were internally estimated; therefore, we have concluded that our determination of fair value of our notes receivable was primarily based upon Level 3 inputs, as discussed below.
	Impairment Charges
	During the three and nine months ended September 30, 2013 and 2012, we recorded the following net non-cash impairment charges:
		Three Months			Three Months				Nine Months				Nine Months
		Ended			Ended				Ended September 30,				Ended
		September 30,			September 30,				2013				September 30,
		2013			2012								2012
	Sold or Held for Sale Operating Properties — Discontinued Operations	$	—		$	—			$	176			$	1,186
	Operating Properties Not Held For Sale — Continuing Operations	1,047			—				2,476				(85		)
	Total Net Impairment	$	1,047		$	—			$	2,652			$	1,101
	The impairment charges for assets that qualify to be classified as held for sale are calculated as the difference between the carrying value of the properties and the estimated fair value, less costs to sell. The impairment charges for assets not held for sale are calculated as the difference between the carrying value of the properties and the estimated fair value. The impairment charges recorded during the three months ended September 30, 2013 and nine months ended September 30, 2013 and 2012 were triggered primarily due to marketing certain properties for sale and our assessment of the likelihood and timing of a potential sale transaction.
	The accounting guidance for the fair value measurement provisions for the impairment of long lived assets establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers include: Level 1, defined as observable inputs such as quoted prices in active markets for identical assets; Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable; and Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions. The fair market values were primarily determined using third party purchase contracts and offers.
	The following table presents information about our real estate assets that were measured at fair value on a non-recurring basis during the nine months ended September 30, 2013. The table indicates the fair value hierarchy of the valuation techniques we utilized to determine fair value.
		Fair Value Measurements on a Non-Recurring Basis Using:
	Description	At September 30, 2013			Quoted Prices in			Significant Other			Unobservable				Total
					Active Markets for			Observable Inputs			Inputs				Impairment for the Nine Months Ended
					Identical Assets			(Level 2)			(Level 3)
					(Level  1)
	Long-lived Assets Not Held For Sale*	$	6,875		—			—			$	6,875			$	(1,047	)
	_____________________
	* Excludes industrial properties for which impairment of $1,605 was recorded during the nine months ended September 30, 2013 since the related assets are sold or recorded at carrying value, which is lower than estimated fair value at September 30, 2013.
	The following table presents quantitative information about the Level 3 fair value measurements at September 30, 2013.
	Quantitative Information about Level 3 Fair Value Measurements:
	Description		Fair Value			Valuation Technique		Unobservable Inputs		Range
	One industrial property comprising approximately 0.5 million square feet of GLA		$	6,875		Contracted Price		(A)		N/A
	(A) The fair value for the property is based upon the value of a third party purchase contract, which is subject to our corroboration for reasonableness.

Investments_in_and_Advances_to

Investments in and Advances to Other Real Estate Partnerships	9 Months Ended
	Sep. 30, 2013
Investments in and Advances to Other Real Estate Partnerships	'
	4. Investments in and Advances to Other Real Estate Partnerships
	The investments in and advances to Other Real Estate Partnerships reflects the Operating Partnership’s limited partnership equity interests in the entities referred to in Note 1 to these consolidated financial statements.
	Summarized condensed financial information as derived from the financial statements of the Other Real Estate Partnerships is presented below:
	Condensed Combined Balance Sheets
		September 30,			December 31,
		2013			2012
	ASSETS
	Assets:
	Net Investment in Real Estate	$	276,525		$	264,284
	Note Receivable	123,444			142,982
	Other Assets, Net	33,902			34,476
	Total Assets	$	433,871		$	441,742
	LIABILITIES AND PARTNERS’ CAPITAL
	Liabilities:
	Mortgage Loans Payable	$	98,111		$	107,287
	Other Liabilities, Net	14,276			11,570
	Partners’ Capital	321,484			322,885
	Total Liabilities and Partners’ Capital	$	433,871		$	441,742
	Operating Partnership's Share of Equity	$	320,228		$	321,663
	Basis Differentials (1)	(123,952		)	(143,559		)
	Carrying Value of the Operating Partnership's Investments in Other Real Estate Partnerships	$	196,276		$	178,104
	_________________
	(1)    This amount represents the aggregate difference between the Operating Partnership's historical cost basis and the basis reflected at the Other Real Estate Partnerships' level. Basis differentials relate to the elimination of a note receivable and related accrued interest between a Other Real Estate Partnership and wholly owned subsidiaries of the Operating Partnership.
	Condensed Combined Statements of Operations
		Three Months			Three Months			Nine Months			Nine Months
		Ended			Ended			Ended			Ended
		September 30,			September 30,			September 30,			September 30,
		2013			2012			2013			2012
	Total Revenues	$	9,907		$	9,400		$	29,340		$	29,419
	Property Expenses	(2,906		)	(2,604		)	(9,027		)	(8,404		)
	Impairment of Real Estate	—			—			—			172
	Depreciation and Other Amortization	(3,071		)	(3,351		)	(9,120		)	(10,888		)
	Interest Income	1,237			2,019			3,809			6,405
	Interest Expense	(1,079		)	(1,483		)	(3,541		)	(4,444		)
	Amortization of Deferred Financing Costs	(45		)	(53		)	(142		)	(156		)
	Loss from Retirement of Debt	—			—			(214		)	—
	Income from Continuing Operations	4,043			3,928			11,105			12,104
	Discontinued Operations:
	Income (Loss) Attributable to Discontinued Operations	91			112			210			(20		)
	Gain (Loss) on Sale of Real Estate	1,630			(50		)	1,630			(79		)
	Income (Loss) from Discontinued Operations	1,721			62			1,840			(99		)
	Income Before Gain on Sale of Real Estate	$	5,764		$	3,990		$	12,945		$	12,005
	Gain on Sale of Real Estate	$	70		$	—		$	70		$	—
	Net Income	$	5,834		$	3,990		$	13,015		$	12,005

Investments_in_Joint_Ventures

Investments in Joint Ventures	9 Months Ended
	Sep. 30, 2013
Equity Method Investments and Joint Ventures [Abstract]	'
Investments in Joint Ventures	'
	5. Investments in Joint Ventures
	At September 30, 2013, the 2003 Net Lease Joint Venture owned four industrial properties comprising approximately 2.5 million square feet of GLA. The 2003 Net Lease Joint Venture is considered a variable interest entity in accordance with the FASB guidance on the consolidation of variable interest entities. We continue to conclude that we are not the primary beneficiary of this venture. As of September 30, 2013, our investment in the 2003 Net Lease Joint Venture is $1,163. Our maximum exposure to loss is equal to our investment. We continue to hold our 10% equity interest in the 2007 Europe Joint Venture. As of September 30, 2013, the 2007 Europe Joint Venture did not own any properties.
	During the three and nine months ended September 30, 2013, we recognized fees from our Joint Ventures of $59 and $180, respectively, and $295 and $439 during the three and nine months ended September 30, 2012, respectively.

Indebtedness

Indebtedness	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Indebtedness	'
	6. Indebtedness
	The following table discloses certain information regarding our indebtedness:
		Outstanding Balance at						Interest		Effective			Maturity Date
								Rate at		Interest
		30-Sep-13			December  31, 2012			September 30, 2013		Rate at Issuance
	Mortgage Loans Payable, Net	$	614,900		$	656,329		4.03% – 8.26%		4.03% – 8.26%			January 2014- September 2022
	Unamortized Premiums	(121		)	(161		)
	Mortgage Loans Payable, Gross	$	614,779		$	656,168
	Senior Unsecured Notes, Net
	2016 Notes	$	159,552		$	159,510		5.75	%	5.91	%		1/15/16
	2017 Notes	54,959			55,385			7.5	%	7.52	%		12/1/17
	2027 Notes	6,066			6,066			7.15	%	7.11	%		5/15/27
	2028 Notes	31,883			55,261			7.6	%	8.13	%		7/15/28
	2032 Notes	10,512			11,500			7.75	%	7.87	%		4/15/32
	2014 Notes	80,772			79,683			6.42	%	6.54	%		6/1/14
	2017 II Notes	101,771			106,745			5.95	%	6.37	%		5/15/17
	Subtotal	$	445,515		$	474,150
	Unamortized Discounts	1,381			2,570
	Senior Unsecured Notes, Gross	$	446,896		$	476,720
	Unsecured Credit Facility	$	171,000		$	98,000		1.631	%	1.631	%		9/29/17	*
	* The maturity date may be extended an additional year at our election, subject to certain restrictions.
	Mortgage Loans Payable, Net
	During the three and nine months ended September 30, 2013, we paid off and retired prior to maturity mortgage loans payable in the amount of $14,046 and $32,429, respectively. In connection with these prepayments, we recognized $486 and $975 as loss from retirement of debt for the three and nine months ended September 30, 2013, respectively.
	As of September 30, 2013, mortgage loans payable are collateralized, and in some instances cross-collateralized, by industrial properties with a net carrying value of $771,120. We believe the Operating Partnership and the Company were in compliance with all covenants relating to mortgage loans payable as of September 30, 2013.
	Senior Unsecured Notes, Net
	During the nine months ended September 30, 2013, we repurchased and retired the following senior unsecured notes prior to maturity:
		Principal			Purchase
		Amount			Price
		Repurchased
	2017 Notes	$	430		$	482
	2017 II Notes	5,000			5,300
	2028 Notes	23,394			26,547
	2032 Notes	1,000			1,163
	Total	$	29,824		$	33,492
	In connection with these repurchases prior to maturity, we recognized $5,003 as loss from retirement of debt for the nine months ended September 30, 2013, which is the difference between the repurchase price of $33,492 and the principal amount retired of $29,824, net of the pro rata write off of the unamortized debt issue discount, the unamortized deferred financing costs and the unamortized settlement amount of the interest rate protection agreements related to the repurchase of $28, $191 and $1,116, respectively.
	Unsecured Credit Facility
	On July 19, 2013, we amended and restated our existing $450,000 revolving credit facility (the "Old Credit Facility"), increasing the borrowing capacity thereunder to $625,000 (as amended and restated, the "Unsecured Credit Facility"). We may request that the borrowing capacity under the Unsecured Credit Facility be increased to $825,000, subject to certain restrictions. The amendment extended the maturity date from December 12, 2014 to September 29, 2017 with an option to extend an additional one year at our election, subject to certain restrictions. At September 30, 2013, the Unsecured Credit Facility provides for interest only payments initially at LIBOR plus 145 basis points, that varies based on our leverage ratio. In the event we achieve an investment grade rating from one of certain rating agencies, the rate may be decreased at our election, based on the investment grade rating. In connection with the amendment of the Old Credit Facility, we wrote off $56 of unamortized deferred financing costs, which is included in Loss from Retirement of Debt for the three and nine months ended September 30, 2013.
	Indebtedness
	The following is a schedule of the stated maturities and scheduled principal payments as of September 30, 2013 of our indebtedness, exclusive of premiums and discounts, for the next five years ending December 31, and thereafter:
		Amount
	Remainder of 2013	$	2,959
	2014	133,327
	2015	34,951
	2016	275,948
	2017	337,783
	Thereafter	447,707
	Total	$	1,232,675
	The Unsecured Credit Facility and the indentures governing our senior unsecured notes contain certain financial covenants, including limitations on incurrence of debt and debt service coverage. Under the Unsecured Credit Facility, an event of default can occur if the lenders, in their good faith judgment, determine that a material adverse change has occurred which could prevent timely repayment or materially impair our ability to perform our obligations under the loan agreement. We believe that we were in compliance with all covenants as of September 30, 2013. However, these financial covenants are complex and there can be no assurance that these provisions would not be interpreted by our noteholders or lenders in a manner that could impose and cause us to incur material costs.
	Fair Value
	At September 30, 2013 and December 31, 2012, the fair values of our indebtedness were as follows:
		30-Sep-13						December 31, 2012
		Carrying			Fair			Carrying			Fair
		Amount			Value			Amount			Value
	Mortgage Loans Payable, Net	$	614,900		$	629,823		$	656,329		$	699,903
	Senior Unsecured Notes, Net	445,515			483,604			474,150			516,943
	Unsecured Credit Facility	171,000			171,000			98,000			98,192
	Total	$	1,231,415		$	1,284,427		$	1,228,479		$	1,315,038
	The fair values of our mortgage loans payable were determined by discounting the future cash flows using the current rates at which similar loans would be made based upon similar leverage levels and similar remaining maturities. The current market rates we utilized were internally estimated. The fair value of the senior unsecured notes was determined by using rates, as advised by our bankers in certain cases, that are based upon recent trades within the same series of the senior unsecured notes, recent trades for senior unsecured notes with comparable maturities, recent trades for fixed rate unsecured debt from companies with profiles similar to ours, as well as overall economic conditions. The fair value of the Unsecured Credit Facility was determined by discounting the future cash flows using current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining term, assuming no repayment until maturity. We have concluded that our determination of fair value for our mortgage loans payable, senior unsecured notes and Unsecured Credit Facility was primarily based upon Level 3 inputs.

Partners_Capital

Partners' Capital	9 Months Ended
	Sep. 30, 2013
Partners' Capital	'
	7. Partners’ Capital
	Preferred Contributions
	On July 18, 2013, the Company redeemed the 2,000,000 Depositary Shares, each representing 1/10,000th of a share of the Company's 7.25% Series K Cumulative Redeemable Preferred Stock, $0.01 par value (the "Series K Preferred Stock"), at a redemption price of $25.00 per Depositary Share, and paid a pro-rated third quarter dividend of $0.090625 per Depositary Share, totaling $181. An equivalent number of Series K Cumulative Redeemable Preferred Units ("the Series K Preferred Units") were redeemed on July 18, 2013 as well. The initial offering costs associated with the issuance of the Series K Preferred Units, as well as costs associated with the redemption, totaled $2,121 and are reflected as a deduction from net income in determining earnings per unit for the three and nine months ended September 30, 2013.
	On April 11, 2013, the Company redeemed the remaining 4,000,000 Depositary Shares, each representing 1/10,000th of a share, of the Company's 7.25% Series J Cumulative Redeemable Preferred Stock, $0.01 par value (the "Series J Preferred Stock"), at a redemption price of $25.00 per Depositary Share, and paid a pro-rated second quarter dividend of $0.055382 per Depositary Share, totaling $221. An equivalent number of Series J Cumulative Redeemable Preferred Units (the "Series J Preferred Units") were redeemed on April 11, 2013 as well. The remaining initial offering costs associated with the issuance of the Series J Preferred Units, as well as costs associated with the redemption, totaled $3,546 and are reflected as a deduction from net income in determining earnings per unit for the nine months ended September 30, 2013.
	Unit Contributions
	During the nine months ended September 30, 2013, the Company issued 8,400,000 shares of the Company’s common stock in an underwritten public offering. Net proceeds were $132,050. The proceeds were contributed to us in exchange for Units and are reflected in our financial statements as a general partner contribution.
	On March 1, 2012, the Company and the Operating Partnership entered into distribution agreements with sales agents to sell up to 12,500,000 shares of the Company's common stock, for up to $125,000 aggregate gross sale proceeds, from time to time in "at-the-market" offerings (the "ATM"). During the nine months ended September 30, 2013, the Company issued 2,315,704 shares of the Company's common stock under the ATM resulting in net proceeds to the Company of $41,735. These proceeds were contributed to us in exchange for an equivalent number of Units and are reflected in our financial statements as a general partner contribution. Under the terms of the ATM, sales are to be made primarily in transactions that are deemed to be "at the market" offerings, including sales made directly on the New York Stock Exchange or sales made through a market maker other than on an exchange or by privately negotiated transactions.
	During the nine months ended September 30, 2013, 99,508 limited partnership units were converted into an equivalent number of general partnership units, resulting in a reclassification of $943 between Limited Partners Units and General Partner Units.
	Restricted Units and Long-Term Incentive Program
	During the nine months ended September 30, 2013, the Company awarded 284,461 shares of restricted stock awards to certain employees, which had a fair value of $4,719 on the date of approval by the Compensation Committee of the Board of Directors. We issued Units to the Company in the same amounts. These restricted stock awards vest over a period of three years. Compensation expense will be charged to earnings over the vesting period for the shares expected to vest except if the recipient is not required to provide future service in exchange for vesting of the shares. If vesting of a recipient's restricted stock is not contingent upon future service, the expense is recognized immediately at the date of grant. During the nine months ended September 30, 2013, we recognized $1,008 of compensation expense related to restricted shares granted during the first quarter to our Chief Executive Officer for which future service was not required.
	The Board of Directors adopted the 2013 Long-Term Incentive Program ("LTIP") and effective July 1, 2013, certain officers and employees of the Company were granted 718,960 performance units ("LTIP Unit Awards"). The LTIP Unit Awards had a fair value of $5,411 on the grant date as determined by a lattice-binomial option-pricing model based on a Monte Carlo simulation. The LTIP Unit Awards vest based upon the relative total shareholder return ("TSR") of the Company's stock compared to the TSRs of the MSCI US REIT Index and the NAREIT Industrial Index. The TSR for half of the granted units is calculated based upon the performance from July 1, 2013 through June 30, 2014 and the other half is calculated based upon the performance from July 1, 2013 through December 31, 2015. Compensation expense will be charged to earnings on a straight-line basis over the respective performance periods. At the end of the respective performance periods, each participant will be issued shares of our common stock equal to the maximum shares issuable to the participant for the performance period multiplied by a percentage, ranging from 0% to 100%, based on our TSR as compared to the TSR of the MSCI US REIT Index and the NAREIT Industrial Index. The participants will also be entitled to dividend equivalents for shares issued pursuant to vested LTIP Unit Awards, which dividend equivalents represent any common dividends that would been paid with respect to such issued shares after the grant of the LTIP Unit Awards and prior to the date of settlement.
	We recognized $1,769 and $4,436 for the three and nine months ended September 30, 2013, respectively, and $1,309 and $3,707 for the three and nine months ended September 30, 2012, respectively, in amortization related to restricted stock and unit awards and LTIP Unit Awards, of which $11 and $24, respectively, was capitalized in connection with development activities for the three and nine months ended September 30, 2013, respectively, and $19 and $19 for the three and nine months ended September 30, 2012, respectively. At September 30, 2013, we had $9,094 in unrecognized compensation related to unvested restricted stock and LTIP Unit Awards. The weighted average period that the unrecognized compensation is expected to be recognized is 0.90 years.
	Distributions
	The coupon rate of our Series F Preferred Units resets every quarter at 2.375% plus the greater of (i) the 30 year Treasury constant maturity treasury ("CMT") Rate, (ii) the 10 year Treasury CMT Rate or (iii) 3 month LIBOR. For the third quarter of 2013, the new coupon rate was 5.935%. See Note 11 for additional derivative information related to the Series F Preferred Units coupon rate reset.
	The following table summarizes distributions accrued during the nine months ended September 30, 2013:
		Nine Months Ended September 30, 2013
		Distribution		Total
		per Unit		Distribution
	General Partner/Limited Partner Units	$	0.255	$	29,074
	Series F Preferred Units	$	4,242.04	$	2,121
	Series G Preferred Units	$	5,427.00	$	1,357
	Series J Preferred Units *	$	5,085.12	$	2,034
	Series K Preferred Units **	$	9,968.85	$	1,994
	* The second quarter 2013 distribution per unit was pro-rated as discussed in the "Preferred Contributions" section.
	**The third quarter 2013 distribution per unit was pro-rated as discussed in the "Preferred Contributions" section.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Loss	9 Months Ended
	Sep. 30, 2013
Accumulated Other Comprehensive Loss [Abstract]	'
Accumulated Other Comprehensive Loss	'
	8. Accumulated Other Comprehensive Loss
	The following tables summarize the changes in Accumulated Other Comprehensive Loss by component for the nine months ended September 30, 2013 and the reclassifications out of Accumulated Other Comprehensive Loss for the three and nine months ended September 30, 2013:
		Interest Rate Protection Agreements			Foreign Currency Translation Adjustment			Total
	Balance as of December 31, 2012	$	(7,008	)	$	179		$	(6,829	)
	Other Comprehensive Loss Before Reclassifications	—			(14		)	(14		)
	Amounts Reclassified from Accumulated Other Comprehensive Loss	2,908			—			2,908
	Net Current Period Other Comprehensive Income (Loss)	2,908			(14		)	2,894
	Balance as of September 30, 2013	$	(4,100	)	$	165		$	(3,935	)
			Amount Reclassified from Accumulated Other Comprehensive Loss
	Details about Accumulated Other Comprehensive Loss Components		Three Months Ended September 30, 2013			Nine Months Ended September 30, 2013			Affected Line Item in the Consolidated Statements of Operations
	Interest Rate Protection Agreements
	Amortization of Interest Rate Protection Agreements		$	609		$	1,792		Interest Expense
	Write-off of Unamortized Settlement Amounts of Interest Rate Protection Agreements		17			1,116			Loss from Retirement of Debt
			$	626		2,908			Total

Supplemental_Information_to_St

Supplemental Information to Statements of Cash Flows	9 Months Ended
	Sep. 30, 2013
Supplemental Cash Flow Information [Abstract]	'
Supplemental Information to Statements of Cash Flows	'
	9. Supplemental Information to Statements of Cash Flows
		Nine Months			Nine Months
		Ended			Ended
		September 30, 2013			September 30, 2012
	Interest Expense Capitalized in Connection with Development Activity	$	2,447		$	1,078
	Supplemental Schedule of Non-Cash Investing and Financing Activities:
	Distribution Payable on General and Limited Partner Units	$	9,788		$	—
	Distribution Payable on Preferred Units	$	—		$	5,177
	Exchange of Limited Partnership Units for General Partnership Units:
	Limited Partnership Units	$	(943	)	$	(2,710	)
	General Partnership Units	943			2,710
	Total	$	—		$	—
	Mortgage Loan Payable Assumed in Conjunction with a Property Acquisition	$	—		$	12,026
	Write-off of Fully Depreciated Assets	$	(36,992	)	$	(30,782	)

Earnings_Per_Unit_EPU

Earnings Per Unit ("EPU")	9 Months Ended
	Sep. 30, 2013
Earnings Per Unit [Abstract]	'
Earnings Per Unit ("EPU")	'
	10. Earnings Per Unit ("EPU")
	The computation of basic and diluted EPU is presented below:
		Three Months				Three Months			Nine Months			Nine Months
		Ended				Ended			Ended			Ended
		30-Sep-13				30-Sep-12			30-Sep-13			30-Sep-12
	Numerator:
	Income (Loss) from Continuing Operations	$	4,779			$	92		$	3,982		$	(17,665	)
	Gain on Sale of Real Estate	221				3,777			483			3,777
	Income from Continuing Operations Allocable to Participating Securities	(12		)		—			—			—
	Preferred Unit Distributions	(1,392		)		(4,725		)	(7,506		)	(14,285		)
	Redemption of Preferred Units	(2,121		)		—			(5,667		)	—
	Income (Loss) from Continuing Operations Available to Unitholders	$	1,475			$	(856	)	$	(8,708	)	$	(28,173	)
	Income from Discontinued Operations	$	3,738			$	5,324		$	14,538		$	13,841
	Income from Discontinued Operations Allocable to Participating Securities	(30		)		(34		)	(120		)	—
	Income from Discontinued Operations Attributable to Unitholders	$	3,708			$	5,290		$	14,418		$	13,841
	Net Income (Loss) Available	$	5,225			$	4,468		$	5,830		$	(14,332	)
	Net Income Allocable to Participating Securities	(42		)		(34		)	(120		)	—
	Net Income (Loss) Available to Unitholders	$	5,183			$	4,434		$	5,710		$	(14,332	)
	Denominator:
	Weighted Average Units — Basic	114,089				98,432			110,823			94,464
	Effect of Dilutive Securities that Result in the Issuance of General Partner Units:
	LTIP Unit Awards	315				—			—			—
	Weighted Average Units - Diluted	114,404				98,432			110,823			94,464
	Basic and Diluted EPU:
	Income (Loss) from Continuing Operations Available to Unitholders	$	0.01			$	(0.01	)	$	(0.08	)	$	(0.30	)
	Income from Discontinued Operations Attributable to Unitholders	$	0.03			$	0.05		$	0.13		$	0.15
	Net Income (Loss) Available to Unitholders	$	0.04			$	0.04		$	0.05		$	(0.15	)
	Participating securities include Units that correspond to the Company's 489,381 and 745,712 of unvested restricted stock awards outstanding at September 30, 2013 and 2012, respectively, which participate in non-forfeitable distributions of the Operating Partnership. Under the two class method, participating security holders are allocated income, in proportion to total weighted average units outstanding, based upon the greater of net income (after reduction for preferred unit distributions and redemption of preferred units) or common distributions declared. Since participating security holders are not obligated to share in losses and no common distributions were declared during the nine months ended September 30, 2012, there was no allocation of income to participating security holders for the nine months ended September 30, 2012.
	The number of weighted average units—diluted is the same as the number of weighted average units — basic for the three months ended September 30, 2012 and nine months ended September 30, 2013 and 2012, as the effect of Units corresponding to the Company's LTIP Unit Awards (which do not participate in non-forfeitable distributions of the Operating Partnership) was excluded as its inclusion would have been antidilutive to the loss from continuing operations available to Unitholders. Units corresponding to the following awards of the Company could be dilutive in future periods:
		Number of			Number of
		Awards			Awards
		Outstanding At			Outstanding At
		30-Sep-13			30-Sep-12
	Non-Participating Securities:
	Restricted Stock Unit Awards	273,400			713,550
	LTIP Unit Awards	718,960			—

Derivatives

Derivatives

9 Months Ended

Sep. 30, 2013

Derivative Instruments and Hedging Activities Disclosure [Abstract]

'

Derivatives

'

11. Derivatives

Our objectives in using interest rate derivatives are to add stability to interest expense or preferred stock dividends and to manage our cash flow volatility and exposure to interest rate movements. To accomplish this objective, we primarily use interest rate swaps as part of our interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable-rate amounts from a counterparty in exchange for fixed-rate payments over the life of the agreements without exchange of the underlying notional amount.

Our Series F Preferred Units are subject to a coupon rate reset. The coupon rate resets every quarter at 2.375% plus the greater of i) the 30 year Treasury CMT Rate, ii) the 10 year Treasury CMT Rate or iii) 3 month LIBOR. For the third quarter of 2013, the new coupon rate was 5.935%. In October 2008, we entered into an interest rate swap agreement with a notional value of $50,000 to mitigate our exposure to floating interest rates related to the forecasted reset rate of the coupon rate of our Series F Preferred Units (the "Series F Agreement"). This Series F Agreement fixes the 30 year Treasury CMT rate at 5.2175%. Accounting guidance for derivatives does not permit hedge accounting treatment related to equity instruments and therefore the mark-to-market gains or losses related to this agreement are recorded in the statement of operations. For the three and nine months ended September 30, 2013, net gains of $0 and $52, respectively, are recognized as Mark-to-Market Gain (Loss) on Interest Rate Protection Agreements. For the three and nine months ended September 30, 2012, net losses of $29 and $334, respectively, are recognized as Mark-to-Market Gain (Loss) on Interest Rate Protection Agreements. Quarterly payments are treated as a component of the mark-to-market gains or losses and totaled $214 and $774, for the three and nine months ended September 30, 2013, respectively, and $326 and $865 for the three and nine months ended September 30, 2012, respectively. The Series F Agreement matured on October 1, 2013.

The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in Other Comprehensive Income ("OCI") and is subsequently reclassified to earnings through interest expense over the life of the derivative or over the life of the debt. In the next 12 months, we expect to amortize approximately $1,846 into net income by increasing interest expense for interest rate protection agreements we settled in previous periods.

The following is a summary of the terms of our derivative and its fair value, which is included in Accounts Payable, Accrued Expenses and Other Liabilities on the accompanying consolidated balance sheets:

Hedge Product

Notional

Strike

Trade

Maturity

Fair Value As  of

Fair Value As  of

Amount

Date

Date

September 30,

December 31,

2013

2012

Derivatives Not Designated as Hedging Instruments:

Series F Agreement*

$

50,000

5.2175

%

October 1, 2008

October 1, 2013

$

—

$

(826

)

_____________________

*

Fair value excludes quarterly settlement payment due on Series F Agreement. As of September 30, 2013 and December 31, 2012, the outstanding payable was $214 and $305, respectively.

The following is a summary of the impact of the derivatives in cash flow hedging relationships on the statements of operations and the statements of OCI for the three and nine months ended September 30, 2013 and 2012:

Three Months Ended

Nine Months Ended

Interest Rate Products

Location on Statement

September 30, 2013

September 30, 2012

September 30, 2013

September 30, 2012

Amortization Reclassified from OCI into Income (Loss)

Interest Expense

$

(609

)

$

(579

)

$

(1,792

)

$

(1,690

)

The guidance for fair value measurement of financial instruments includes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers include: Level 1, defined as observable inputs such as quoted prices in active markets; Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable; and Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions.

The following table sets forth our financial liability that is accounted for at fair value on a recurring basis as of September 30, 2013 and December 31, 2012:

Fair Value

Fair Value Measurements at

Reporting Date Using:

Description

Quoted Prices in

Significant Other

Unobservable

Active  Markets for

Observable Inputs

Inputs

Identical Assets

(Level 2)

(Level 3)

(Level 1)

Liabilities:

Series F Agreement at September 30, 2013

$

—

—

—

$

—

Series F Agreement at December 31, 2012

$

(826

)

—

—

$

(826

)

The following table presents the quantitative information about the Level 3 fair value measurements at September 30, 2013 and December 31, 2012:

Quantitative Information about Level 3 Fair Value Measurements:

Description

Fair Value

Valuation Technique

Unobservable Inputs

Range

Series F Agreement at September 30, 2013

$

—

N/A

N/A

(A)

Series F Agreement at December 31, 2012

$

(826

)

Discounted Cash Flow

Long Dated Treasuries (B)

2.82% - 2.91%

Own Credit Risk (C)

0.98% - 1.59%

(A)

The Series F Agreement matured on October 1, 2013.

(B)

Represents the forward 30 year Treasury CMT Rate.

(C)

Represents credit default swap spread curve used in the valuation analysis at December 31, 2012.

The valuation of the Series F Agreement was determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of the instrument. This analysis reflected the contractual terms of the agreement including the period to maturity. In adjusting the fair value of the Series F Agreement for the effect of nonperformance risk, we had considered the impact of netting and any applicable credit enhancement. To comply with the provisions of fair value measurement, we calculated a credit valuation adjustment ("CVA") to appropriately reflect both our own nonperformance risk and our counterparty's nonperformance risk in the fair value measurements. We considered the Series F Agreement to be classified as Level 3 in the fair value hierarchy due to a significant number of unobservable inputs. The Series F Agreement swapped a fixed rate of 5.2175% for floating rate payments based on 30 year Treasury CMT Rate. No market observable prices exist for long dated Treasuries. Therefore, we had classified the Series F Agreement in its entirety as Level 3.

The following table presents a reconciliation of our liability classified as Level 3 at September 30, 2013:

Fair Value Measurements

Using Significant

Unobservable Inputs

(Level 3)

Derivatives

Ending Liability Balance at December 31, 2012

$

(826

)

Mark-to-Market of the Series F Agreement

826

Ending Liability Balance at September 30, 2013

$

—

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	12. Commitments and Contingencies
	In the normal course of business, we are involved in legal actions arising from the ownership of our industrial properties. In our opinion, the liabilities, if any, that may ultimately result from such legal actions are not expected to have a materially adverse effect on our consolidated financial position, operations or liquidity.
	In conjunction with the development of industrial properties, we have entered into agreements with general contractors for the construction of industrial buildings. At September 30, 2013, we have committed to the development of three industrial buildings totaling approximately 1.1 million square feet of GLA. The estimated total construction costs as of September 30, 2013, are approximately $94,400. Of this amount, approximately $27,700 remains to be funded. There can be no assurance that the actual completion cost will not exceed the estimated completion cost stated above.

Subsequent_Events

Subsequent Events	9 Months Ended
	Sep. 30, 2013
Subsequent Events [Abstract]	'
Subsequent Events	'
	13. Subsequent Events
	From October 1, 2013 to November 1, 2013, we paid off prior to maturity mortgage loans payable in the aggregate amount of $31,966.
	From October 1, 2013 to November 1, 2013, we acquired 100% of an LLC interest that owned one industrial property for a purchase price of approximately $26,349, excluding costs incurred in conjunction with the acquisition of the industrial property and sold three industrial properties and one land parcel for approximately $4,644.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Reclassifications	'
	Reclassifications
	Certain reclassifications have been made to the 2012 financial statements to conform to the 2013 presentation. Additionally, the results of operations for the nine months ended September 30, 2013 include an adjustment of $1,561 to decrease depreciation and amortization expense which should have been recorded during previous periods. Management evaluated the impact of the adjustment and does not believe it is material to the results of the anticipated full year, current period or any previous period.
IRS Tax Refund	'
	IRS Tax Refund
	On August 24, 2009, we received a private letter ruling from the IRS granting favorable loss treatment under Sections 331 and 336 of the Code on the tax liquidation of one of our former taxable REIT subsidiaries. On November 6, 2009, legislation was signed that allowed businesses with net operating losses for 2008 or 2009 to carry back those losses for up to five years. As a result, we received a refund from the IRS of $40,418 in the fourth quarter of 2009 (the "Refund") in connection with this tax liquidation. The IRS examination team, which is required by statute to review all refund claims in excess of $2,000 on behalf of the Joint Committee on Taxation, indicated to us that it disagreed with certain of the property valuations we obtained from an independent valuation expert in support of our fair value of the liquidated taxable REIT subsidiary and our claim for the Refund. During the year ended December 31, 2012, we reached an agreement with the regional office of the IRS on a proposed adjustment to the Refund. The total agreed-upon adjustment to taxable income was $13,700, which equates to $4,806 of taxes owed. We were also required to pay accrued interest of approximately $500. During the year ended December 31, 2012, the Operating Partnership recorded the charge for the agreed-upon adjustment and the related estimated accrued interest which was reflected as a component of income tax expense. During 2013, the settlement amount was approved by the Joint Committee on Taxation. During the nine months ended September 30, 2013, we paid the agreed upon taxes and related accrued interest.
	As a result of the Joint Committee on Taxation's approval, during 2013, we entered into closing agreements with the IRS that determined the timing of the settlement on the tax characterization of the limited partners of the Operating Partnership and the stockholders of the Company. Pursuant to these closing agreements, $8,238 of the preferred stock distributions for the year ended December 31, 2012 are taxable as capital gain.
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements
	In February 2013, the FASB issued Accounting Standards Update No. 2013-02, "Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income" ("ASU 2013-02"). ASU 2013-02 requires that public companies present, either in a single note or parenthetically on the face of the financial statements, the effect of significant amounts reclassified from each component of accumulated other comprehensive income based on its source and the income statement line items affected by the reclassification. ASU 2013-02 is effective for annual periods beginning after December 15, 2012, and is to be applied prospectively. The adoption of this guidance did not have a material impact on our consolidated financial statements.

Investment_in_Real_Estate_Tabl

Investment in Real Estate (Tables)	9 Months Ended
	Sep. 30, 2013
Investment in Real Estate [Abstract]	'
Summary Regarding Industrial Properties Included in Discontinued Operations	'
	The following table discloses certain information regarding the industrial properties included in discontinued operations for the three and nine months ended September 30, 2013 and 2012:
		Three Months			Three Months				Nine Months				Nine Months
		Ended			Ended				Ended				Ended
		September 30,			September 30,				September 30,				September 30,
		2013			2012				2013				2012
	Total Revenues	$	116		$	3,081			$	2,311			$	11,449
	Property Expenses	58			(1,241		)		(871		)		(4,749		)
	Impairment of Real Estate	—			—				(176		)		(1,186		)
	Depreciation and Amortization	(49		)	(986		)		(746		)		(3,757		)
	Gain on Sale of Real Estate	3,613			4,470				14,020				12,084
	Income from Discontinued Operations	$	3,738		$	5,324			$	14,538			$	13,841
Net Non-Cash Impairment Charges	'
	During the three and nine months ended September 30, 2013 and 2012, we recorded the following net non-cash impairment charges:
		Three Months			Three Months				Nine Months				Nine Months
		Ended			Ended				Ended September 30,				Ended
		September 30,			September 30,				2013				September 30,
		2013			2012								2012
	Sold or Held for Sale Operating Properties — Discontinued Operations	$	—		$	—			$	176			$	1,186
	Operating Properties Not Held For Sale — Continuing Operations	1,047			—				2,476				(85		)
	Total Net Impairment	$	1,047		$	—			$	2,652			$	1,101
Fair Value Measurements on a Nonrecurring Basis	'
	The following table presents information about our real estate assets that were measured at fair value on a non-recurring basis during the nine months ended September 30, 2013. The table indicates the fair value hierarchy of the valuation techniques we utilized to determine fair value.
		Fair Value Measurements on a Non-Recurring Basis Using:
	Description	At September 30, 2013			Quoted Prices in			Significant Other			Unobservable				Total
					Active Markets for			Observable Inputs			Inputs				Impairment for the Nine Months Ended
					Identical Assets			(Level 2)			(Level 3)
					(Level  1)
	Long-lived Assets Not Held For Sale*	$	6,875		—			—			$	6,875			$	(1,047	)
	_____________________
	* Excludes industrial properties for which impairment of $1,605 was recorded during the nine months ended September 30, 2013 since the related assets are sold or recorded at carrying value, which is lower than estimated fair value at September 30, 2013.
Quantitative Information about Level 3 Fair Value Measurements	'
	The following table presents quantitative information about the Level 3 fair value measurements at September 30, 2013.
	Quantitative Information about Level 3 Fair Value Measurements:
	Description		Fair Value			Valuation Technique		Unobservable Inputs		Range
	One industrial property comprising approximately 0.5 million square feet of GLA		$	6,875		Contracted Price		(A)		N/A
	(A) The fair value for the property is based upon the value of a third party purchase contract, which is subject to our corroboration for reasonableness.

Investments_in_and_Advances_to1

Investments in and Advances to Other Real Estate Partnerships (Tables)	9 Months Ended
	Sep. 30, 2013
Investments in and Advances to Other Real Estate Partnerships [Abstract]	'
Condensed Combined Balance Sheets	'
	Condensed Combined Balance Sheets
		September 30,			December 31,
		2013			2012
	ASSETS
	Assets:
	Net Investment in Real Estate	$	276,525		$	264,284
	Note Receivable	123,444			142,982
	Other Assets, Net	33,902			34,476
	Total Assets	$	433,871		$	441,742
	LIABILITIES AND PARTNERS’ CAPITAL
	Liabilities:
	Mortgage Loans Payable	$	98,111		$	107,287
	Other Liabilities, Net	14,276			11,570
	Partners’ Capital	321,484			322,885
	Total Liabilities and Partners’ Capital	$	433,871		$	441,742
	Operating Partnership's Share of Equity	$	320,228		$	321,663
	Basis Differentials (1)	(123,952		)	(143,559		)
	Carrying Value of the Operating Partnership's Investments in Other Real Estate Partnerships	$	196,276		$	178,104
	_________________
	(1)    This amount represents the aggregate difference between the Operating Partnership's historical cost basis and the basis reflected at the Other Real Estate Partnerships' level. Basis differentials relate to the elimination of a note receivable and related accrued interest between a Other Real Estate Partnership and wholly owned subsidiaries of the Operating Partnership.
Condensed Combined Statements of Operations	'
	Condensed Combined Statements of Operations
		Three Months			Three Months			Nine Months			Nine Months
		Ended			Ended			Ended			Ended
		September 30,			September 30,			September 30,			September 30,
		2013			2012			2013			2012
	Total Revenues	$	9,907		$	9,400		$	29,340		$	29,419
	Property Expenses	(2,906		)	(2,604		)	(9,027		)	(8,404		)
	Impairment of Real Estate	—			—			—			172
	Depreciation and Other Amortization	(3,071		)	(3,351		)	(9,120		)	(10,888		)
	Interest Income	1,237			2,019			3,809			6,405
	Interest Expense	(1,079		)	(1,483		)	(3,541		)	(4,444		)
	Amortization of Deferred Financing Costs	(45		)	(53		)	(142		)	(156		)
	Loss from Retirement of Debt	—			—			(214		)	—
	Income from Continuing Operations	4,043			3,928			11,105			12,104
	Discontinued Operations:
	Income (Loss) Attributable to Discontinued Operations	91			112			210			(20		)
	Gain (Loss) on Sale of Real Estate	1,630			(50		)	1,630			(79		)
	Income (Loss) from Discontinued Operations	1,721			62			1,840			(99		)
	Income Before Gain on Sale of Real Estate	$	5,764		$	3,990		$	12,945		$	12,005
	Gain on Sale of Real Estate	$	70		$	—		$	70		$	—
	Net Income	$	5,834		$	3,990		$	13,015		$	12,005

Indebtedness_Tables

Indebtedness (Tables)	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Information Regarding Indebtedness	'
	The following table discloses certain information regarding our indebtedness:
		Outstanding Balance at						Interest		Effective			Maturity Date
								Rate at		Interest
		30-Sep-13			December  31, 2012			September 30, 2013		Rate at Issuance
	Mortgage Loans Payable, Net	$	614,900		$	656,329		4.03% – 8.26%		4.03% – 8.26%			January 2014- September 2022
	Unamortized Premiums	(121		)	(161		)
	Mortgage Loans Payable, Gross	$	614,779		$	656,168
	Senior Unsecured Notes, Net
	2016 Notes	$	159,552		$	159,510		5.75	%	5.91	%		1/15/16
	2017 Notes	54,959			55,385			7.5	%	7.52	%		12/1/17
	2027 Notes	6,066			6,066			7.15	%	7.11	%		5/15/27
	2028 Notes	31,883			55,261			7.6	%	8.13	%		7/15/28
	2032 Notes	10,512			11,500			7.75	%	7.87	%		4/15/32
	2014 Notes	80,772			79,683			6.42	%	6.54	%		6/1/14
	2017 II Notes	101,771			106,745			5.95	%	6.37	%		5/15/17
	Subtotal	$	445,515		$	474,150
	Unamortized Discounts	1,381			2,570
	Senior Unsecured Notes, Gross	$	446,896		$	476,720
	Unsecured Credit Facility	$	171,000		$	98,000		1.631	%	1.631	%		9/29/17	*
	* The maturity date may be extended an additional year at our election, subject to certain restrictions.
Senior Unsecured Notes Repurchases	'
	During the nine months ended September 30, 2013, we repurchased and retired the following senior unsecured notes prior to maturity:
		Principal			Purchase
		Amount			Price
		Repurchased
	2017 Notes	$	430		$	482
	2017 II Notes	5,000			5,300
	2028 Notes	23,394			26,547
	2032 Notes	1,000			1,163
	Total	$	29,824		$	33,492
Schedule of Maturities of Long-term Debt	'
	The following is a schedule of the stated maturities and scheduled principal payments as of September 30, 2013 of our indebtedness, exclusive of premiums and discounts, for the next five years ending December 31, and thereafter:
		Amount
	Remainder of 2013	$	2,959
	2014	133,327
	2015	34,951
	2016	275,948
	2017	337,783
	Thereafter	447,707
	Total	$	1,232,675
Summary of Indebtedness At Estimated Fair Value	'
	At September 30, 2013 and December 31, 2012, the fair values of our indebtedness were as follows:
		30-Sep-13						December 31, 2012
		Carrying			Fair			Carrying			Fair
		Amount			Value			Amount			Value
	Mortgage Loans Payable, Net	$	614,900		$	629,823		$	656,329		$	699,903
	Senior Unsecured Notes, Net	445,515			483,604			474,150			516,943
	Unsecured Credit Facility	171,000			171,000			98,000			98,192
	Total	$	1,231,415		$	1,284,427		$	1,228,479		$	1,315,038

Partners_Capital_Tables

Partners' Capital (Tables)	9 Months Ended
	Sep. 30, 2013
Dividend Distributions	'
	The following table summarizes distributions accrued during the nine months ended September 30, 2013:
		Nine Months Ended September 30, 2013
		Distribution		Total
		per Unit		Distribution
	General Partner/Limited Partner Units	$	0.255	$	29,074
	Series F Preferred Units	$	4,242.04	$	2,121
	Series G Preferred Units	$	5,427.00	$	1,357
	Series J Preferred Units *	$	5,085.12	$	2,034
	Series K Preferred Units **	$	9,968.85	$	1,994
	* The second quarter 2013 distribution per unit was pro-rated as discussed in the "Preferred Contributions" section.
	**The third quarter 2013 distribution per unit was pro-rated as discussed in the "Preferred Contributions" section.

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Loss (Tables)	9 Months Ended
	Sep. 30, 2013
Accumulated Other Comprehensive Loss [Abstract]	'
Schedule of Accumulated Other Comprehensive Loss	'
	The following tables summarize the changes in Accumulated Other Comprehensive Loss by component for the nine months ended September 30, 2013 and the reclassifications out of Accumulated Other Comprehensive Loss for the three and nine months ended September 30, 2013:
		Interest Rate Protection Agreements			Foreign Currency Translation Adjustment			Total
	Balance as of December 31, 2012	$	(7,008	)	$	179		$	(6,829	)
	Other Comprehensive Loss Before Reclassifications	—			(14		)	(14		)
	Amounts Reclassified from Accumulated Other Comprehensive Loss	2,908			—			2,908
	Net Current Period Other Comprehensive Income (Loss)	2,908			(14		)	2,894
	Balance as of September 30, 2013	$	(4,100	)	$	165		$	(3,935	)
Reclassification out of Accumulated Other Comprehensive Income	'
			Amount Reclassified from Accumulated Other Comprehensive Loss
	Details about Accumulated Other Comprehensive Loss Components		Three Months Ended September 30, 2013			Nine Months Ended September 30, 2013			Affected Line Item in the Consolidated Statements of Operations
	Interest Rate Protection Agreements
	Amortization of Interest Rate Protection Agreements		$	609		$	1,792		Interest Expense
	Write-off of Unamortized Settlement Amounts of Interest Rate Protection Agreements		17			1,116			Loss from Retirement of Debt
			$	626		2,908			Total

Supplemental_Information_to_St1

Supplemental Information to Statements of Cash Flows (Tables)	9 Months Ended
	Sep. 30, 2013
Supplemental Cash Flow Information [Abstract]	'
Supplemental Information to Statements of Cash Flows	'
	Supplemental Information to Statements of Cash Flows
		Nine Months			Nine Months
		Ended			Ended
		September 30, 2013			September 30, 2012
	Interest Expense Capitalized in Connection with Development Activity	$	2,447		$	1,078
	Supplemental Schedule of Non-Cash Investing and Financing Activities:
	Distribution Payable on General and Limited Partner Units	$	9,788		$	—
	Distribution Payable on Preferred Units	$	—		$	5,177
	Exchange of Limited Partnership Units for General Partnership Units:
	Limited Partnership Units	$	(943	)	$	(2,710	)
	General Partnership Units	943			2,710
	Total	$	—		$	—
	Mortgage Loan Payable Assumed in Conjunction with a Property Acquisition	$	—		$	12,026
	Write-off of Fully Depreciated Assets	$	(36,992	)	$	(30,782	)

Earnings_Per_Unit_EPU_Tables

Earnings Per Unit ("EPU") (Tables)	9 Months Ended
	Sep. 30, 2013
Earnings Per Unit [Abstract]	'
Computation of Basic and Diluted EPU	'
	The computation of basic and diluted EPU is presented below:
		Three Months				Three Months			Nine Months			Nine Months
		Ended				Ended			Ended			Ended
		30-Sep-13				30-Sep-12			30-Sep-13			30-Sep-12
	Numerator:
	Income (Loss) from Continuing Operations	$	4,779			$	92		$	3,982		$	(17,665	)
	Gain on Sale of Real Estate	221				3,777			483			3,777
	Income from Continuing Operations Allocable to Participating Securities	(12		)		—			—			—
	Preferred Unit Distributions	(1,392		)		(4,725		)	(7,506		)	(14,285		)
	Redemption of Preferred Units	(2,121		)		—			(5,667		)	—
	Income (Loss) from Continuing Operations Available to Unitholders	$	1,475			$	(856	)	$	(8,708	)	$	(28,173	)
	Income from Discontinued Operations	$	3,738			$	5,324		$	14,538		$	13,841
	Income from Discontinued Operations Allocable to Participating Securities	(30		)		(34		)	(120		)	—
	Income from Discontinued Operations Attributable to Unitholders	$	3,708			$	5,290		$	14,418		$	13,841
	Net Income (Loss) Available	$	5,225			$	4,468		$	5,830		$	(14,332	)
	Net Income Allocable to Participating Securities	(42		)		(34		)	(120		)	—
	Net Income (Loss) Available to Unitholders	$	5,183			$	4,434		$	5,710		$	(14,332	)
	Denominator:
	Weighted Average Units — Basic	114,089				98,432			110,823			94,464
	Effect of Dilutive Securities that Result in the Issuance of General Partner Units:
	LTIP Unit Awards	315				—			—			—
	Weighted Average Units - Diluted	114,404				98,432			110,823			94,464
	Basic and Diluted EPU:
	Income (Loss) from Continuing Operations Available to Unitholders	$	0.01			$	(0.01	)	$	(0.08	)	$	(0.30	)
	Income from Discontinued Operations Attributable to Unitholders	$	0.03			$	0.05		$	0.13		$	0.15
	Net Income (Loss) Available to Unitholders	$	0.04			$	0.04		$	0.05		$	(0.15	)
Non-Participating Securities	'
	Units corresponding to the following awards of the Company could be dilutive in future periods:
		Number of			Number of
		Awards			Awards
		Outstanding At			Outstanding At
		30-Sep-13			30-Sep-12
	Non-Participating Securities:
	Restricted Stock Unit Awards	273,400			713,550
	LTIP Unit Awards	718,960			—

Derivatives_Tables

Derivatives (Tables)

9 Months Ended

Sep. 30, 2013

Derivative Instruments and Hedging Activities Disclosure [Abstract]

'

Summary of Derivatives and Fair Values

'

The following is a summary of the terms of our derivative and its fair value, which is included in Accounts Payable, Accrued Expenses and Other Liabilities on the accompanying consolidated balance sheets:

Hedge Product

Notional

Strike

Trade

Maturity

Fair Value As  of

Fair Value As  of

Amount

Date

Date

September 30,

December 31,

2013

2012

Derivatives Not Designated as Hedging Instruments:

Series F Agreement*

$

50,000

5.2175

%

October 1, 2008

October 1, 2013

$

—

$

(826

)

_____________________

*

Fair value excludes quarterly settlement payment due on Series F Agreement. As of September 30, 2013 and December 31, 2012, the outstanding payable was $214 and $305, respectively.

Summary of Impact of Derivatives in Cash Flow Hedging Relationships on Statement of Operations and Statement of OCI

'

The following is a summary of the impact of the derivatives in cash flow hedging relationships on the statements of operations and the statements of OCI for the three and nine months ended September 30, 2013 and 2012:

Three Months Ended

Nine Months Ended

Interest Rate Products

Location on Statement

September 30, 2013

September 30, 2012

September 30, 2013

September 30, 2012

Amortization Reclassified from OCI into Income (Loss)

Interest Expense

$

(609

)

$

(579

)

$

(1,792

)

$

(1,690

)

Fair Value Measurements on Recurring Basis

'

The following table sets forth our financial liability that is accounted for at fair value on a recurring basis as of September 30, 2013 and December 31, 2012:

Fair Value

Fair Value Measurements at

Reporting Date Using:

Description

Quoted Prices in

Significant Other

Unobservable

Active  Markets for

Observable Inputs

Inputs

Identical Assets

(Level 2)

(Level 3)

(Level 1)

Liabilities:

Series F Agreement at September 30, 2013

$

—

—

—

$

—

Series F Agreement at December 31, 2012

$

(826

)

—

—

$

(826

)

Quantitative Information About Level 3 Fair Value Measurements

'

The following table presents the quantitative information about the Level 3 fair value measurements at September 30, 2013 and December 31, 2012:

Quantitative Information about Level 3 Fair Value Measurements:

Description

Fair Value

Valuation Technique

Unobservable Inputs

Range

Series F Agreement at September 30, 2013

$

—

N/A

N/A

(A)

Series F Agreement at December 31, 2012

$

(826

)

Discounted Cash Flow

Long Dated Treasuries (B)

2.82% - 2.91%

Own Credit Risk (C)

0.98% - 1.59%

(A)

The Series F Agreement matured on October 1, 2013.

(B)

Represents the forward 30 year Treasury CMT Rate.

(C)

Represents credit default swap spread curve used in the valuation analysis at December 31, 2012.

Reconciliation of Liabilities Classified as Level 3

'

The following table presents a reconciliation of our liability classified as Level 3 at September 30, 2013:

Fair Value Measurements

Using Significant

Unobservable Inputs

(Level 3)

Derivatives

Ending Liability Balance at December 31, 2012

$

(826

)

Mark-to-Market of the Series F Agreement

826

Ending Liability Balance at September 30, 2013

$

—

Organization_and_Formation_of_1

Organization and Formation of Partnership - Additional Information (Detail) (USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified	Property
	Jointventures
	sqft
	State
Organization and Formation of Partnership [Line Items]	'
Ownership interest of sole general partner	96.00%
Ownership interest of limited partners	4.00%
General partner preferred units liquidation preference	$75,000
Number of joint ventures	2
Number of industrial properties owned	632
Number of states in which industrial properties owned are located	24
Gross leasable area (GLA) of industrial properties owned	55,100,000
Other Real Estate Partnerships	'
Organization and Formation of Partnership [Line Items]	'
Minimum ownership interest in limited partnerships	99.00%
Minimum ownership interest of limited partnerships	0.01%
Number of limited partnerships	8
Number of industrial properties owned	65
Gross leasable area (GLA) of industrial properties owned	7,400,000

Summary_of_Significant_Account2

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2009	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013
					Internal Revenue Service (IRS) [Member]	Internal Revenue Service (IRS) [Member]	Internal Revenue Service (IRS) [Member]	Prior Period Adjustment [Member]
					Settlement with Taxing Authority [Member]	Settlement with Taxing Authority [Member]	Settlement with Taxing Authority [Member]
Summary of Significant Accounting Policies [Line Items]	'	'	'	'	'	'	'	'
Depreciation and other amortization	$25,533	$25,201	$75,671	$78,250	'	'	'	$1,561
Period to carry back net operating losses	'	'	'	'	'	'up to 5 years	'	'
IRS tax refund	'	'	'	'	40,418	'	'	'
Refunds in excess are required to be reviewed by Joint Committee on Taxation	'	'	'	'	'	2,000	'	'
Agreed refund adjustment to taxable income	'	'	'	'	'	'	13,700	'
Taxes owed	'	'	'	'	'	'	4,806	'
Accrued interest	'	'	'	'	'	'	500	'
Preferred stock distributions taxable as capital gain	'	'	'	'	'	'	$8,238	'

Investment_in_Real_Estate_Addi

Investment in Real Estate - Additional Information (Detail) (USD $)	9 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
	sqft	Property	Property
	Property
Real Estate Investments [Line Items]	'	'	'
Number of industrial properties acquired	1	'	'
Square footage of real estate property acquired	500,000	'	'
Purchase price of acquisitions	$46,463	'	'
Number of industrial properties sold	18	23	26
Gross leasable area (GLA) of industrial properties sold	1,500,000	'	'
Gross proceeds from the sale of industrial properties and land parcels	64,920	'	'
Net gain on sale of properties and land parcels	14,503	15,861	'
Number of industrial properties held for sale	1	'	'
Gross leasable area (GLA) of industrial properties held for sale	50,000	'	'
Impairment reversal of industrial properties	'	1,605	'
Notes receivable outstanding	40,795	'	41,201
Net discount of notes receivable outstanding	207	'	255
Fair value of notes receivable	$41,906	'	$44,783
Discontinuing Operations [Member]	'	'	'
Real Estate Investments [Line Items]	'	'	'
Number of sold properties included in discontinued operations	18	'	'

Investment_in_Real_Estate_Summ

Investment in Real Estate - Summary Regarding Industrial Properties Included in Discontinued Operations (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Investment in Real Estate [Abstract]	'	'	'	'
Total Revenues	$116	$3,081	$2,311	$11,449
Property Expenses	58	-1,241	-871	-4,749
Impairment of Real Estate	0	0	-176	-1,186
Depreciation and Amortization	-49	-986	-746	-3,757
Gain on Sale of Real Estate	3,613	4,470	14,020	12,084
Income from Discontinued Operations	$3,738	$5,324	$14,538	$13,841

Investment_in_Real_Estate_Net_

Investment in Real Estate - Net Non-Cash Impairment Charges (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Impairment Charges [Line Items]	'	'	'	'
Total Net Impairment	$1,047	$0	$2,652	$1,101
Held for Sale and Sold Operating Properties - Discontinued Operations	'	'	'	'
Impairment Charges [Line Items]	'	'	'	'
Total Net Impairment	0	0	176	1,186
Operating Properties Marketed For Sale - Continuing Operations	'	'	'	'
Impairment Charges [Line Items]	'	'	'	'
Total Net Impairment	$1,047	$0	$2,476	($85)

Investment_in_Real_Estate_Fair

Investment in Real Estate - Fair Value Measurements on Non-Recurring Basis (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]	'
Long-lived Assets Sold Impairment	($1,047)	[1]
Quoted Prices in Active Markets for Identical Assets (Level 1)	'
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]	'
Long-lived Assets Held for Sale	0
Significant Other Observable Inputs (Level 2)	'
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]	'
Long-lived Assets Held for Sale	0
Unobservable Inputs (Level 3)	'
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]	'
Long-lived Assets Held for Sale	6,875	[1]
Fair Value, Measurements, Nonrecurring	'
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]	'
Long-lived Assets Held for Sale	$6,875	[1]
[1]	Excludes industrial properties for which impairment of $1,605 was recorded during the nine months ended September 30, 2013 since the related assets are sold or recorded at carrying value, which is lower than estimated fair value at September 30, 2013.

Investment_in_Real_Estate_Quan

Investment in Real Estate - Quantitative Information About Level 3 Fair Value Measurements (Detail) (Unobservable Inputs (Level 3), USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
	sqft
	Property
Contracted Price [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Number of industrial properties	1
Gross leaseable area	500,000
Third Party Pricing [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Fair value of property	6,875

Investments_in_and_Advances_to2

Investments in and Advances to Other Real Estate Partnerships - Condensed Combined Balance Sheets (Detail) (USD $)	Sep. 30, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Assets:	'		'
Net Investment in Real Estate	$2,120,250		$2,124,526
Real Estate and Other Assets Held for Sale, Net of Accumulated Depreciation and Amortization of $658 and $3,050	2,291		6,765
Total Assets	2,512,430		2,503,882
Liabilities:	'		'
Mortgage Loans Payable	614,900		656,329
Partners’ Capital	1,166,957		1,155,151
Total Liabilities and Partners’ Capital	2,512,430		2,503,882
Carrying Value of the Operating Partnership's Investments in Other Real Estate Partnerships	196,276		178,104
Other Real Estate Partnerships	'		'
Assets:	'		'
Net Investment in Real Estate	276,525		264,284
Note Receivable	123,444		142,982
Other Assets, Net	33,902		34,476
Total Assets	433,871		441,742
Liabilities:	'		'
Mortgage Loans Payable	98,111		107,287
Other Liabilities, Net	14,276		11,570
Partners’ Capital	321,484		322,885
Total Liabilities and Partners’ Capital	433,871		441,742
Operating Partnership's Share of Equity	320,228		321,663
Basis Differentials (1)	-123,952	[1]	-143,559	[1]
Carrying Value of the Operating Partnership's Investments in Other Real Estate Partnerships	$196,276		$178,104
[1]	This amount represents the aggregate difference between the Operating Partnership's historical cost basis and the basis reflected at the Other Real Estate Partnerships' level. Basis differentials relate to the elimination of a note receivable and related accrued interest between a Other Real Estate Partnership and wholly owned subsidiaries of the Operating Partnership.

Investments_in_and_Advances_to3

Investments in and Advances to Other Real Estate Partnerships - Condensed Combined Balance Sheets (Parenthetical) (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule Of Condensed Consolidating Balance Sheets [Line Items]	'	'
Real Estate and Other Assets Held for Sale, Accumulated Depreciation and Amortization	$658	$3,050

Investments_in_and_Advances_to4

Investments in and Advances to Other Real Estate Partnerships - Condensed Combined Statements of Operations (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Schedule Of Condensed Consolidating Statement Of Operations [Line Items]	'	'	'	'
Total Revenues	$73,503	$69,210	$221,126	$209,596
Property Expenses	-23,863	-21,819	-72,914	-67,320
Impairment of Real Estate	'	'	-2,652	-1,101
Depreciation and Other Amortization	-25,533	-25,201	-75,671	-78,250
Interest Income	611	676	1,818	2,319
Interest Expense	-16,918	-18,644	-51,850	-59,548
Amortization of Deferred Financing Costs	-736	-815	-2,326	-2,437
Loss from Retirement of Debt	-662	-424	-6,034	-6,646
Income (Loss) from Continuing Operations	4,779	92	3,982	-17,665
Discontinued Operations:	'	'	'	'
Income (Loss) Attributable to Discontinued Operations	125	854	518	1,757
Gain (Loss) on Sale of Real Estate	3,613	4,470	14,020	12,084
Income from Discontinued Operations	3,738	5,324	14,538	13,841
Income (Loss) Before Gain on Sale of Real Estate	8,517	5,416	18,520	-3,824
Gain on Sale of Real Estate	221	3,777	483	3,777
Net Income (Loss)	8,738	9,193	19,003	-47
Other Real Estate Partnerships	'	'	'	'
Schedule Of Condensed Consolidating Statement Of Operations [Line Items]	'	'	'	'
Total Revenues	9,907	9,400	29,340	29,419
Property Expenses	-2,906	-2,604	-9,027	-8,404
Impairment of Real Estate	0	0	0	172
Depreciation and Other Amortization	-3,071	-3,351	-9,120	-10,888
Interest Income	1,237	2,019	3,809	6,405
Interest Expense	-1,079	-1,483	-3,541	-4,444
Amortization of Deferred Financing Costs	-45	-53	-142	-156
Loss from Retirement of Debt	0	0	-214	0
Income (Loss) from Continuing Operations	4,043	3,928	11,105	12,104
Discontinued Operations:	'	'	'	'
Income (Loss) Attributable to Discontinued Operations	91	112	210	-20
Gain (Loss) on Sale of Real Estate	1,630	-50	1,630	-79
Income from Discontinued Operations	1,721	62	1,840	-99
Income (Loss) Before Gain on Sale of Real Estate	5,764	3,990	12,945	12,005
Gain on Sale of Real Estate	70	0	70	0
Net Income (Loss)	$5,834	$3,990	$13,015	$12,005

Investments_in_Joint_Ventures_

Investments in Joint Ventures - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
	Property		Property
	sqft		sqft
Schedule of Equity Method Investments [Line Items]	'	'	'	'	'
Number of industrial properties owned	632	'	632	'	'
Gross leasable area (GLA) of industrial properties owned	55,100,000	'	55,100,000	'	'
Investment in Joint Venture	$1,163	'	$1,163	'	$1,012
Fees received from joint ventures	59	295	180	439	'
2003 Net Lease Joint Venture	'	'	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'	'	'
Number of industrial properties owned	4	'	4	'	'
Gross leasable area (GLA) of industrial properties owned	2,500,000	'	2,500,000	'	'
Investment in Joint Venture	$1,163	'	$1,163	'	'
2007 Europe Joint Venture	'	'	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'	'	'
Number of industrial properties owned	0	'	0	'	'
Equity interest	10.00%	'	10.00%	'	'

Indebtedness_Information_Regar

Indebtedness - Information Regarding Indebtedness (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Debt Instrument [Line Items]	'		'
Mortgage Loans Payable, Net	$614,900		$656,329
Unamortized Premiums	-121		-161
Mortgage Loans Payable, Gross	614,779		656,168
Senior Unsecured Notes, Net	445,515		474,150
Unamortized Discounts	1,381		2,570
Senior Unsecured Notes, Gross	446,896		476,720
Unsecured Credit Facility	171,000		98,000
Secured Debt	'		'
Debt Instrument [Line Items]	'		'
Interest Rate, Minimum	4.03%		'
Interest Rate, Maximum	8.26%		'
Effective Interest Rate, Minimum	4.03%		'
Effective Interest Rate, Maximum	8.26%		'
Maturity Date Range, Start	1-Jan-14		'
Maturity Date Range, End	1-Sep-22		'
2016 Notes	'		'
Debt Instrument [Line Items]	'		'
Senior Unsecured Notes, Net	159,552		159,510
Interest Rate	5.75%		'
Effective Interest Rate	5.91%		'
Maturity Date	15-Jan-16		'
2017 Notes	'		'
Debt Instrument [Line Items]	'		'
Senior Unsecured Notes, Net	54,959		55,385
Interest Rate	7.50%		'
Effective Interest Rate	7.52%		'
Maturity Date	1-Dec-17		'
2027 Notes	'		'
Debt Instrument [Line Items]	'		'
Senior Unsecured Notes, Net	6,066		6,066
Interest Rate	7.15%		'
Effective Interest Rate	7.11%		'
Maturity Date	15-May-27		'
2028 Notes	'		'
Debt Instrument [Line Items]	'		'
Senior Unsecured Notes, Net	31,883		55,261
Interest Rate	7.60%		'
Effective Interest Rate	8.13%		'
Maturity Date	15-Jul-28		'
2032 Notes	'		'
Debt Instrument [Line Items]	'		'
Senior Unsecured Notes, Net	10,512		11,500
Interest Rate	7.75%		'
Effective Interest Rate	7.87%		'
Maturity Date	15-Apr-32		'
2014 Notes	'		'
Debt Instrument [Line Items]	'		'
Senior Unsecured Notes, Net	80,772		79,683
Interest Rate	6.42%		'
Effective Interest Rate	6.54%		'
Maturity Date	1-Jun-14		'
2017 II Notes	'		'
Debt Instrument [Line Items]	'		'
Senior Unsecured Notes, Net	$101,771		$106,745
Interest Rate	5.95%		'
Effective Interest Rate	6.37%		'
Maturity Date	15-May-17		'
Line of Credit	'		'
Debt Instrument [Line Items]	'		'
Interest Rate	1.63%		'
Effective Interest Rate	1.63%		'
Maturity Date	29-Sep-17	[1]	'
[1]	* The maturity date may be extended an additional year at our election, subject to certain restrictions.

Indebtedness_Additional_Inform

Indebtedness - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Jul. 19, 2013	Dec. 14, 2011
Debt Disclosure [Line Items]	'	'	'	'	'	'
Loss from Retirement of Debt	($662)	($424)	($6,034)	($6,646)	'	'
Principal amount of senior unsecured notes repurchased	'	'	29,824	'	'	'
Purchase price senior unsecured notes	'	'	33,492	'	'	'
Unamortized deferred financing cost, wrote off	'	'	56	'	'	'
Line of credit facility, maximum borrowing capacity	'	'	'	'	625,000	450,000
Line of credit facility, increase, additional borrowings	'	'	825,000	'	'	'
Number of years of extension of line of credit facility at election	'	'	'1 year	'	'	'
Line of credit facility, interest rate description	'	'	'145	'	'	'
Mortgages	'	'	'	'	'	'
Debt Disclosure [Line Items]	'	'	'	'	'	'
Mortgage loans paid off and retired prior to maturity	14,046	'	32,429	'	'	'
Loss from Retirement of Debt	486	'	975	'	'	'
Carrying value of industrial properties held under mortgage	771,120	'	771,120	'	'	'
Unsecured Debt	'	'	'	'	'	'
Debt Disclosure [Line Items]	'	'	'	'	'	'
Loss from Retirement of Debt	'	'	5,003	'	'	'
Principal amount of senior unsecured notes repurchased	'	'	29,824	'	'	'
Purchase price senior unsecured notes	'	'	33,492	'	'	'
Unamortized debt issue discount	'	'	28	'	'	'
Unamortized deferred financing cost, wrote off	'	'	191	'	'	'
Unamortized settlement amount of interest rate protection agreements	'	'	$1,116	'	'	'

Indebtedness_Senior_Unsecured_

Indebtedness - Senior Unsecured Notes Repurchases (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Unsecured Senior Notes [Line Items]	'
Principal Amount Repurchased	$29,824
Purchase Price	33,492
2017 Notes	'
Unsecured Senior Notes [Line Items]	'
Principal Amount Repurchased	430
Purchase Price	482
2017 II Notes	'
Unsecured Senior Notes [Line Items]	'
Principal Amount Repurchased	5,000
Purchase Price	5,300
2028 Notes	'
Unsecured Senior Notes [Line Items]	'
Principal Amount Repurchased	23,394
Purchase Price	26,547
2032 Notes	'
Unsecured Senior Notes [Line Items]	'
Principal Amount Repurchased	1,000
Purchase Price	$1,163

Indebtedness_Schedule_of_Matur

Indebtedness - Schedule of Maturities of Long-term Debt (Detail) (USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified
Debt Disclosure [Abstract]	'
Remainder of 2013	$2,959
2014	133,327
2015	34,951
2016	275,948
2017	337,783
Thereafter	447,707
Total	$1,232,675

Indebtedness_Summary_of_Indebt

Indebtedness - Summary of Indebtedness at Estimated Fair Value (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Debt Disclosure [Abstract]	'	'
Mortgage Loans Payable, Net, Carrying Amount	$614,900	$656,329
Senior Unsecured Notes, Net, Carrying Amount	445,515	474,150
Unsecured Credit Facility, Carrying Amount	171,000	98,000
Total, Carrying Amount	1,231,415	1,228,479
Mortgage Loans Payable, Net, Fair Value	629,823	699,903
Senior Unsecured Notes, Net, Fair Value	483,604	516,943
Unsecured Credit Facility, Fair Value	171,000	98,192
Total, Fair Value	$1,284,427	$1,315,038

Partners_Capital_Additional_In

Partners' Capital - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended						9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Mar. 01, 2012	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013
					Series K Cumulative Redeemable Preferred Stock [Member]	Series J Cumulative Redeemable Preferred Stock [Member]	ATM [Member]	ATM [Member]	Restricted Stock [Member]	LTIP Unit Awards	Series F Preferred Units [Member]
Class of Stock [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Depositary shares redeemed	'	'	'	'	2,000,000	4,000,000	'	'	'	'	'
Portion of preferred stock	'	'	'	'	0.0001	0.0001	'	'	'	'	'
Dividend rate per share	'	'	'	'	7.25%	7.25%	'	'	'	'	'
Par value of each depositary share	'	'	'	'	$0.01	$0.01	'	'	'	'	'
Redemption price per share	'	'	'	'	$25	$25	'	'	'	'	'
Preferred dividend per depositary share	'	'	'	'	$0.09	$0.06	'	'	'	'	'
Total preferred dividend, depositary shares	'	'	'	'	$181	$221	'	'	'	'	'
Cost associated with share redemption	2,121	0	5,667	0	2,121	3,546	'	'	'	'	'
Underwritten public offering shares	'	'	8,400,000	'	'	'	'	'	'	'	'
Net proceeds from underwriting	'	'	132,050	'	'	'	'	'	'	'	'
Shares of common stock issuable under at-the-market offering	'	'	'	'	'	'	'	12,500,000	'	'	'
Common stock issued under at-the-market offering	'	'	'	'	'	'	2,315,704	'	'	'	'
Aggregate gross sale proceeds	'	'	'	'	'	'	'	125,000	'	'	'
Proceeds from issuance of common stock	'	'	'	'	'	'	41,735	'	'	'	'
Conversion of units to common stock	'	'	99,508	'	'	'	'	'	'	'	'
Reclassification between limited and general units due to conversion	'	'	943	'	'	'	'	'	'	'	'
Restricted stock/unit awards to employees	'	'	'	'	'	'	'	'	284,461	718,960	'
Fair value of Long Term Incentive Program unit awards	'	'	'	'	'	'	'	'	'	5,411	'
Minimum Percentage Of Shares Obtainable Under Long Term Incentive Program	'	'	'	'	'	'	'	'	'	0.00%	'
Maximum Percentage Of Shares Obtainable Under Long Term Incentive Program	'	'	'	'	'	'	'	'	'	100.00%	'
Fair value of restricted stock/unit awards	'	'	'	'	'	'	'	'	4,719	'	'
Vesting period of restricted stock/unit awards to employees	'	'	'	'	'	'	'	'	'3 years	'	'
Compensation expense related to restricted shares issued during the quarter	'	'	1,008	'	'	'	'	'	'	'	'
Amortization related to restricted stock and unit awards	1,769	1,309	4,436	3,707	'	'	'	'	'	'	'
Amount of share based compensation expense capitalized	11	19	24	19	'	'	'	'	'	'	'
Unrecognized compensation expense related to restricted stock/unit awards	$9,094	'	$9,094	'	'	'	'	'	'	'	'
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	'	'	'0 years 10 months 26 days	'	'	'	'	'	'	'	'
Minimum fixed coupon rate of preferred stock	'	'	'	'	'	'	'	'	'	'	2.38%
Number of years of U.S. treasury rate one	'	'	'	'	'	'	'	'	'	'	'30 years
Number of years of U.S. treasury rate two	'	'	'	'	'	'	'	'	'	'	'10 years
LIBOR rate	'	'	'	'	'	'	'	'	'	'	'3 month LIBOR
New coupon rate of preferred stock	'	'	'	'	'	'	'	'	'	'	5.94%

Partners_Capital_Dividend_Dist

Partners' Capital - Dividend Distributions (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Class of Stock [Line Items]	'	'	'	'
Distributions Per Unit	$0.09	$0	$0.26	$0
Total Distribution	'	'	$13,173	'
General Partner/Limited Partner Units [Member]	'	'	'	'
Class of Stock [Line Items]	'	'	'	'
Distributions Per Unit	'	'	$0.26	'
Total Distribution	'	'	29,074	'
Series F Preferred Units [Member]	'	'	'	'
Class of Stock [Line Items]	'	'	'	'
Distribution Per Unit	'	'	$4,242.04	'
Total Distribution	'	'	2,121	'
Series G Preferred Units [Member]	'	'	'	'
Class of Stock [Line Items]	'	'	'	'
Distribution Per Unit	'	'	$5,427	'
Total Distribution	'	'	1,357	'
Series J Preferred Units [Member]	'	'	'	'
Class of Stock [Line Items]	'	'	'	'
Distribution Per Unit	'	'	$5,085.12	'
Total Distribution	'	'	2,034	'
Series K Preferred Units [Member]	'	'	'	'
Class of Stock [Line Items]	'	'	'	'
Distribution Per Unit	'	'	$9,968.85	'
Total Distribution	'	'	$1,994	'

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Loss (Changes in AOCI) (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]	'
Balance as of December 31, 2012	($6,829)
Other Comprehensive Loss Before Reclassifications	-14
Amounts Reclassified from Accumulated Other Comprehensive Loss	2,908
Net Current Period Other Comprehensive Income (Loss)	2,894
Balance as of September 30, 2013	-3,935
Interest Rate Protection Agreements	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'
Balance as of December 31, 2012	-7,008
Other Comprehensive Loss Before Reclassifications	0
Amounts Reclassified from Accumulated Other Comprehensive Loss	2,908
Net Current Period Other Comprehensive Income (Loss)	2,908
Balance as of September 30, 2013	-4,100
Foreign Currency Translation Adjustment	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'
Balance as of December 31, 2012	179
Other Comprehensive Loss Before Reclassifications	-14
Amounts Reclassified from Accumulated Other Comprehensive Loss	0
Net Current Period Other Comprehensive Income (Loss)	-14
Balance as of September 30, 2013	$165

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Loss (Amounts Reclassified from AOCI) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Reclassification out of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Amortization of Interest Rate Protection Agreements	($16,918)	($18,644)	($51,850)	($59,548)
Write-off of Unamortized Settlement Amounts of Interest Rate Protection Agreements	-662	-424	-6,034	-6,646
Total	-17,705	-19,236	-58,340	-66,646
Interest Rate Protection Agreements | Reclassification out of Accumulated Other Comprehensive Income [Member]	'	'	'	'
Reclassification out of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Amortization of Interest Rate Protection Agreements	609	'	1,792	'
Write-off of Unamortized Settlement Amounts of Interest Rate Protection Agreements	17	'	1,116	'
Total	$626	'	$2,908	'

Supplemental_Information_to_St2

Supplemental Information to Statements of Cash Flows (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Interest Expense Capitalized in Connection with Development Activity	$2,447	$1,078
Mortgage Loan Payable Assumed in Conjunction with a Property Acquisition	0	12,026
Write-off of Fully Depreciated Assets	-36,992	-30,782
Supplemental Schedule of Non-Cash Investing and Financing Activities:	'	'
Distribution payable	9,788	'
Exchange of Limited Partnership Units for General Partnership Units:	'	'
Conversion of Limited Partner Units to General Partner Units	0	0
Limited Partnership Units	'	'
Exchange of Limited Partnership Units for General Partnership Units:	'	'
Conversion of Limited Partner Units to General Partner Units	-943	-2,710
General Partnership Units	'	'
Exchange of Limited Partnership Units for General Partnership Units:	'	'
Conversion of Limited Partner Units to General Partner Units	943	2,710
General and Limited Partner Units	'	'
Supplemental Schedule of Non-Cash Investing and Financing Activities:	'	'
Distribution payable	9,788	0
Preferred Units	'	'
Supplemental Schedule of Non-Cash Investing and Financing Activities:	'	'
Distribution payable	$0	$5,177

Earnings_per_Unit_EPU_Computat

Earnings per Unit ("EPU") - Computation of Basic and Diluted EPU (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Numerator:	'	'	'	'
Income (Loss) from Continuing Operations	$4,779	$92	$3,982	($17,665)
Gain on Sale of Real Estate	221	3,777	483	3,777
Income from Continuing Operations Allocable to Participating Securities	-12	0	0	0
Preferred Unit Distributions	-1,392	-4,725	-7,506	-14,285
Redemption of Preferred Units	-2,121	0	-5,667	0
Income (Loss) from Continuing Operations Available to Unitholders	1,475	-856	-8,708	-28,173
Income from Discontinued Operations	3,738	5,324	14,538	13,841
Income from Discontinued Operations Allocable to Participating Securities	-30	-34	-120	0
Income from Discontinued Operations Attributable to Unitholders	3,708	5,290	14,418	13,841
Net Income (Loss) Available	5,225	4,468	5,830	-14,332
Net Income Allocable to Participating Securities	-42	-34	-120	0
Net Income (Loss) Available to Unitholders	$5,183	$4,434	$5,710	($14,332)
Denominator:	'	'	'	'
Weighted Average Units — Basic	114,089	98,432	110,823	94,464
LTIP Unit Awards	315	0	0	0
Weighted Average Units - Diluted	114,404	98,432	110,823	94,464
Basic and Diluted EPU:	'	'	'	'
Income (Loss) from Continuing Operations Available to Unitholders	$0.01	($0.01)	($0.08)	($0.30)
Income from Discontinued Operations Attributable to Unitholders	$0.03	$0.05	$0.13	$0.15
Net Income (Loss) Available to Unitholders	$0.04	$0.04	$0.05	($0.15)

Earnings_Per_Unit_EPU_Addition

Earnings Per Unit ("EPU") - Additional Information (Detail)	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Unit [Abstract]	'	'
Unvested restricted stock awards outstanding	489,381	745,712

Earnings_per_Unit_EPU_NonParti

Earnings per Unit ("EPU") - Non-Participating Securities (Detail)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Restricted Stock Unit Awards	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Unit	'	'
Number of awards outstanding to non-participating securities	273,400	713,550
LTIP Unit Awards	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Unit	'	'
Number of awards outstanding to non-participating securities	718,960	0

Derivatives_Additional_Informa

Derivatives - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended			9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Sep. 30, 2013	Oct. 31, 2008
						Series F Preferred Units [Member]	Series F Preferred Units [Member]
Derivative [Line Items]	'	'	'	'	'	'	'
Minimum fixed coupon rate of preferred stock	'	'	'	'	'	2.38%	'
Number of years of U.S. treasury rate one	'	'	'	'	'	'30 years	'
Number of years of U.S. treasury rate two	'	'	'	'	'	'10 years	'
LIBOR rate	'	'	'	'	'	'3 month LIBOR	'
New coupon rate of preferred stock	'	'	'	'	'	5.94%	'
Notional value of interest rate swap agreement	'	'	'	'	'	'	$50,000
Treasury rate of agreement	'	'	'	'	'	'	5.22%
Mark-to-Market (Loss) Gain on Interest Rate Protection Agreements	0	-29	52	-334	'	'	'
Settlement payments of mark-to-market gains or losses	214	326	774	865	'	'	'
Amortization to be reclassified from OCI into income	'	'	1,846	'	'	'	'
Number of years of long dated treasuries	'	'	'30 years	'	'	'	'
Outstanding settlement payment due on the agreement	$214	'	$214	'	$305	'	'

Derivatives_Summary_of_Derivat

Derivatives - Summary of Derivatives and Fair Values (Detail) (Series F Agreement [Member], USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Series F Agreement [Member]	'	'
Derivative [Line Items]	'	'
Notional Amount	$50,000	'
Strike	5.22%	'
Trade Date	1-Oct-08	'
Maturity Date	1-Oct-13	'
Fair Value of Derivative Liabilities	$0	($826)

Derivatives_Summary_of_Impact_

Derivatives - Summary of Impact of Derivatives in Cash Flow Hedging Relationships on Statement of Operations and Statement of OCI (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Derivative [Line Items]	'	'	'	'
Amortization Reclassified from OCI into Income (Loss)	$609	$579	$1,792	$1,690
Interest Expense [Member]	'	'	'	'
Derivative [Line Items]	'	'	'	'
Amortization Reclassified from OCI into Income (Loss)	($609)	($579)	($1,792)	($1,690)

Derivatives_Fair_Value_Measure

Derivatives - Fair Value Measurements on Recurring Basis (Detail) (Series F Agreement [Member], USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value On Recurring Basis [Line Items]	'	'
Fair Value of Liabilities	$0	($826)
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)	'	'
Fair Value On Recurring Basis [Line Items]	'	'
Fair Value of Liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2)	'	'
Fair Value On Recurring Basis [Line Items]	'	'
Fair Value of Liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Unobservable Inputs (Level 3)	'	'
Fair Value On Recurring Basis [Line Items]	'	'
Fair Value of Liabilities	$0	($826)

Derivatives_Quantitative_Infor

Derivatives - Quantitative Information About Level 3 Fair Value Measurements (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Jun. 30, 2013		Dec. 31, 2012		Dec. 31, 2012
In Thousands, unless otherwise specified	Series F Agreement [Member]	Series F Agreement [Member]	Discounted Cash Flow [Member]		Discounted Cash Flow [Member]		Discounted Cash Flow [Member]
			Unobservable Inputs (Level 3)		Unobservable Inputs (Level 3)		Unobservable Inputs (Level 3)
			Derivative Financial Instruments, Liabilities [Member]		Derivative Financial Instruments, Liabilities [Member]		Derivative Financial Instruments, Liabilities [Member]
					Minimum		Maximum
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]	'	'	'		'		'
Fair value inputs, long dated treasuries	'	'	0.00%	[1]	2.82%	[1]	2.91%	[1]
Fair value inputs, own credit risk	'	'	'		0.98%	[2]	1.59%	[2]
Fair Value	$0	($826)	'		'		'
[1]	(B)Represents the forward 30 year Treasury CMT Rate.
[2]	(C)Represents credit default swap spread curve used in the valuation analysis at December 31, 2012.

Derivatives_Reconciliation_of_

Derivatives - Reconciliation of Liabilities Classified as Level 3 (Detail) (Unobservable Inputs (Level 3), USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013
In Thousands, unless otherwise specified			Mark-to-Market on Series F Agreement
Derivative [Line Items]	'	'	'
Ending Liability Balance	$0	($826)	'
Mark-to-Market of the Series F Agreement	'	'	826
Ending Liability Balance	$0	($826)	'

Commitments_and_Contingencies_

Commitments and Contingencies - Additional Information (Detail) (USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified	sqft
	building
Commitments and Contingencies Disclosure [Abstract]	'
Number of industrial properties committed to development	3
Gross leasable area (GLA) of industrial properties committed to development	1,100,000
Estimated total construction costs	$94,400
Estimated total construction costs remaining to be funded	$27,700

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (USD $)	9 Months Ended		12 Months Ended			1 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Jul. 19, 2013	Dec. 14, 2011	Nov. 01, 2013
	Property	Property	Property			Subsequent Events
						Parcels
						Property
Subsequent Event [Line Items]	'	'	'	'	'	'
Paid off and retired a secured mortgage loan	$41,389	$20,197	'	'	'	$31,966
Ownership interest acquired	'	'	'	'	'	100.00%
Number of industrial properties acquired	1	'	'	'	'	1
Purchase price of acquisitions	46,463	'	'	'	'	26,349
Payments for repurchase of redeemable preferred stock	150,000	0	'	'	'	'
Line of credit facility, maximum borrowing capacity	'	'	'	625,000	450,000	'
Line of credit facility, increase, additional borrowings	825,000	'	'	'	'	'
Line of credit facility, interest rate description	'145	'	'	'	'	'
Number of years of extension of line of credit facility at election	'1 year	'	'	'	'	'
Number of industrial properties sold	18	23	26	'	'	3
Number of land parcels sold	'	'	'	'	'	1
Proceeds from sale of industrial properties	'	'	'	'	'	$4,644