First Industrial 10-Q 29 Apr 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Trading Symbol	FRFI
Entity Registrant Name	FIRST INDUSTRIAL LP
Entity Central Index Key	1033128
Current Fiscal Year End Date	-19
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding	0

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Investment in Real Estate:
Land	$610,117	$617,426
Buildings and Improvements	2,141,042	2,164,537
Construction in Progress	30,692	22,159
Less: Accumulated Depreciation	-692,300	-686,451
Net Investment in Real Estate	2,089,551	2,117,671
Real Estate and Other Assets Held for Sale, Net of Accumulated Depreciation and Amortization of $796 and $0	4,915	0
Investments in and Advances to Other Real Estate Partnerships	212,491	213,041
Cash and Cash Equivalents	2,953	8,429
Restricted Cash	1,829	1,829
Tenant Accounts Receivable, Net	7,106	6,363
Investment in Joint Venture	0	71
Deferred Rent Receivable, Net	51,395	50,064
Deferred Financing Costs, Net	11,288	9,888
Deferred Leasing Intangibles, Net	29,075	30,704
Prepaid Expenses and Other Assets, Net	63,175	76,186
Total Assets	2,473,778	2,514,246
Indebtedness:
Mortgage Loans Payable, Net	516,164	518,754
Senior Unsecured Notes, Net	364,885	364,861
Unsecured Term Loan	200,000	200,000
Unsecured Credit Facility	168,000	185,000
Accounts Payable, Accrued Expenses and Other Liabilities	72,043	89,209
Deferred Leasing Intangibles, Net	10,784	11,097
Rents Received in Advance and Security Deposits	34,663	32,866
Distributions Payable	14,912	11,949
Total Liabilities	1,381,451	1,413,736
Commitments and Contingencies	0	0
Partners’ Capital:
General Partner Units (110,727,654 and 110,600,866 units outstanding)	1,022,856	1,034,129
Limited Partners Units (4,364,812 and 4,374,637 units outstanding)	80,198	80,757
Accumulated Other Comprehensive Loss	-10,727	-14,376
Total Partners’ Capital	1,092,327	1,100,510
Total Liabilities and Partners’ Capital	$2,473,778	$2,514,246

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, except Share data, unless otherwise specified
Real Estate and Other Assets Held for Sale Accumulated Depreciation and Amortization	$796	$0
General Partner Units, Outstanding	110,727,654	110,600,866
Limited Partners Units, Outstanding	4,364,812	4,374,637

CONSOLIDATED_STATEMENTS_OF_OPE

CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Revenues:
Rental Income	$59,418	$54,138
Tenant Recoveries and Other Income	19,011	19,398
Total Revenues	78,429	73,536
Expenses:
Property Expenses	26,254	26,926
General and Administrative	6,931	5,498
Acquisition Costs	0	35
Depreciation and Other Amortization	25,139	25,150
Total Expenses	58,324	57,609
Other Income (Expense):
Gain on Sale of Real Estate	7,290	0
Interest Income	24	724
Interest Expense	-15,836	-17,724
Amortization of Deferred Financing Costs	-713	-759
Mark-to-Market Loss on Interest Rate Protection Agreements	-12,990	0
Total Other Income (Expense)	-22,225	-17,759
Loss from Continuing Operations Before Equity in Income of Other Real Estate Partnerships, Equity in Income of Joint Ventures and Income Tax Provision	-2,120	-1,832
Equity in Income of Other Real Estate Partnerships	4,566	3,094
Equity in Income of Joint Ventures	71	2,966
Income Tax Provision	-60	-10
Income from Continuing Operations	2,457	4,218
Discontinued Operations:
Income Attributable to Discontinued Operations	0	428
Gain on Sale of Real Estate	0	432
Income from Discontinued Operations	0	860
Net Income	2,457	5,078
Less: Preferred Unit Distributions	0	-1,019
Less: Redemption of Preferred Units	0	-1,462
Net Income Available to Unitholders and Participating Securities	2,457	2,597
Basic and Diluted Earnings Per Unit:
Income from Continuing Operations Available to Unitholders	$0.02	$0.01
Income from Discontinued Operations Attributable to Unitholders	$0	$0.01
Net Income Available to Unitholders	$0.02	$0.02
Distributions Per Unit	$0.13	$0.10
Weighted Average Units Outstanding - Basic	114,681	114,245
Weighted Average Units Outstanding - Diluted	115,046	114,784
Net Income Available to Unitholders Attributable to:
General Partner	2,364	2,493
Limited Partners	93	104
Net Income Available to Unitholders and Participating Securities	$2,457	$2,597

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Net Income	$2,457	$5,078
Mark-to-Market Loss on Interest Rate Protection Agreements	-9,446	-1,604
Reclassification of Fair Value of Interest Rate Protection Agreements (See Note 11)	12,990	0
Amortization of Interest Rate Protection Agreements	131	628
Foreign Currency Translation Adjustment	-26	-50
Comprehensive Income	$6,106	$4,052

CONSOLIDATED_STATEMENT_OF_CHAN

CONSOLIDATED STATEMENT OF CHANGES IN PARTNERS CAPITAL (USD $)	Total	General Partner Units	Limited Partner Units	Accumulated Other Comprehensive Loss
In Thousands, unless otherwise specified
Balance at Dec. 31, 2014	$1,100,510	$1,034,129	$80,757	($14,376)
Increase (Decrease) in Partners' Capital [Roll Forward]
Stock Based Compensation Activity	460	460
Conversion of Limited Partner Units to General Partner Units	0	95	-95
Common Unit Distributions	-14,749	-14,192	-557
Net Income	2,457	2,364	93
Other Comprehensive Income	3,649			3,649
Balance at Mar. 31, 2015	$1,092,327	$1,022,856	$80,198	($10,727)

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$2,457	$5,078
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation	20,552	20,704
Amortization of Deferred Financing Costs	713	759
Other Amortization	7,298	7,557
Provision for Bad Debt	464	650
Equity in Income of Joint Ventures	-71	-2,966
Distributions from Joint Ventures	0	962
Gain on Sale of Real Estate	-7,290	-432
Mark-to-Market Loss on Interest Rate Protection Agreements	12,990	0
Equity in Income of Other Real Estate Partnerships	-4,566	-3,094
Distributions from Investment in Other Real Estate Partnerships	4,566	3,094
Decrease (Increase) in Tenant Accounts Receivable, Prepaid Expenses and Other Assets, Net	7,684	-3,702
(Increase) Decrease in Deferred Rent Receivable	-1,743	628
Decrease in Accounts Payable, Accrued Expenses, Other Liabilities, Rents Received in Advance and Security Deposits	-20,056	-8,296
Cash Book Overdraft	783	1,237
Net Cash Provided by Operating Activities	23,781	22,179
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of Real Estate	0	-13,262
Additions to Investment in Real Estate and Non-Acquisition Tenant Improvements and Lease Costs	-20,723	-17,646
Net Proceeds from Sales of Investments in Real Estate	23,933	1,191
Investments in and Advances to Other Real Estate Partnerships	-2,115	-9,092
Distributions from Other Real Estate Partnerships in Excess of Equity in Income	2,665	7,771
Contributions to and Investments in Joint Ventures	-9	0
Distributions from Joint Ventures	126	2,074
Repayments of Notes Receivable	2,720	17,080
Increase in Escrows	-256	-258
Net Cash Provided by (Used in) Investing Activities	6,341	-12,142
CASH FLOWS FROM FINANCING ACTIVITIES:
Debt and Equity Issuance and Redemption Costs	-2,114	-2,034
Repurchase and Retirement of Restricted Units	-2,101	-1,475
Common Unit Distributions Paid	-11,786	-9,740
Preferred Unit Distributions Paid	0	-1,471
Redemption of Preferred Units	0	-75,000
Repayments on Mortgage Loans Payable	-2,583	-2,756
Proceeds from Unsecured Term Loan	0	200,000
Proceeds from Unsecured Credit Facility	32,000	105,000
Repayments on Unsecured Credit Facility	-49,000	-226,000
Net Cash Used in Financing Activities	-35,584	-13,476
Net Effect of Exchange Rate Changes on Cash and Cash Equivalents	-14	-30
Net Decrease in Cash and Cash Equivalents	-5,462	-3,439
Cash and Cash Equivalents, Beginning of Year	8,429	6,518
Cash and Cash Equivalents, End of Year	$2,953	$3,049

Organization_and_Formation_of_

Organization and Formation of Partnership	3 Months Ended
	Mar. 31, 2015
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 96.2% ownership interest at March 31, 2015. The Company is a real estate investment trust ("REIT") as defined in the Internal Revenue Code of 1986. The Company’s operations are conducted primarily through the Operating Partnership. The limited partners of the Operating Partnership own, in the aggregate, approximately a 3.8% interest in the Operating Partnership at March 31, 2015. 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 LLCs, 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"). The Other Real Estate Partnerships' operating data is presented herein on a combined basis, separate from that of the Consolidated Operating Partnership. 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 Partnerships 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.
	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.
	We also provide various services to two joint ventures (the "2003 Net Lease Joint Venture" and the "2007 Europe Joint
	Venture"; collectively, the "Joint Ventures"). Our noncontrolling equity ownership interests in the 2003 Net Lease Joint Venture
	and 2007 Europe Joint Venture are 15% and 10%, respectively. During the three months ended March 31, 2015, the 2003 Net Lease Joint Venture sold its last remaining industrial property comprising approximately 0.8 million square feet of gross leasable area ("GLA"). At March 31, 2015, the 2007 Europe Joint Venture did not own any properties.
	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.
	As of March 31, 2015, we owned 568 industrial properties located in 24 states, containing an aggregate of approximately 55.1 million square feet of GLA. On a combined basis, as of March 31, 2015, the Other Real Estate Partnerships owned 61 industrial properties, containing an aggregate of approximately 7.9 million square feet of GLA.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2015
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, 2014 ("2014 Form 10-K") and should be read in conjunction with such consolidated financial statements and related notes. The 2014 year end consolidated balance sheet data included in this Form 10-Q filing was derived from the audited consolidated financial statements in our 2014 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, 2014 audited consolidated financial statements included in our 2014 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 March 31, 2015 and December 31, 2014, and the reported amounts of revenues and expenses for the three months ended March 31, 2015 and 2014. 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 March 31, 2015 and December 31, 2014, the results of our operations and comprehensive income for each of the three months ended March 31, 2015 and 2014, and our cash flows for each of the three months ended March 31, 2015 and 2014; all adjustments are of a normal recurring nature.
	Reclassifications
	Certain reclassifications have been made to the 2014 financial statements to conform to the 2015 presentation.
	Discontinued Operations
	Effective January 1, 2015, we adopted Accounting Standards Update ("ASU") No. 2014-08, "Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity" ("ASU 2014-08") for all properties not previously sold. ASU 2014-08 revised the reporting requirements to only allow a component of an entity, or group of components of an entity, to be reported in discontinued operations if the disposal represents a strategic shift that has (or will have) a major effect on an entity’s operations and financial results.  Going forward, we expect the majority of our property dispositions will not qualify as discontinued operations and the results of the dispositions, including gain on sale of real estate, will be presented in Income from Continuing Operations.
	Recent Accounting Pronouncements
	In February 2015, the FASB issued ASU No. 2015-02, "Consolidation (Topic 810) - Amendments to the Consolidation Analysis" (“ASU 2015-02”). ASU 2015-02 updates consolidation guidance for legal entities such as limited partnerships, limited liability companies and securitization structures in an attempt to simplify consolidation accounting. ASU 2015-02 eliminates the presumption that a general partner should consolidate a limited partnership, modifies the evaluation of whether limited partnerships are variable interest entities or voting interest entities and adds requirements that limited partnerships must meet to qualify as voting interest entities. ASU 2015-02 is effective for fiscal years beginning after December 15, 2015, with early adoption permitted. We are currently assessing the adoption of ASU 2015-02 to determine if it will require us to change from accounting for the Other Real Estate Partnerships under the equity method accounting to consolidation of the Other Real Estate Partnerships within our consolidated financial statements.
	In April 2015, the FASB issued ASU No. 2015-03, "Simplifying the Presentation of Debt Issuance Costs" ("ASU 2015-03"), which amends the current presentation of debt issuance costs in the financial statements. ASU 2015-03 requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts, instead of as an asset. The amendments are to be applied retrospectively and are effective for interim and annual periods beginning after December 15, 2015. The adoption of the new guidance is not expected to have a material impact on our consolidated financial statements.

Investment_in_Real_Estate

Investment in Real Estate	3 Months Ended
	Mar. 31, 2015
Real Estate [Abstract]
Investment in Real Estate	3. Investment in Real Estate
	Real Estate Held for Sale
	At March 31, 2015, we had one industrial property comprising approximately 0.2 million square feet of GLA and one land parcel held for sale. There can be no assurance that the industrial property and land parcel held for sale will be sold.
	Sales and Discontinued Operations
	During the three months ended March 31, 2015, we sold eight industrial properties comprising approximately 0.5 million square feet of GLA. Gross proceeds from the sales of the industrial properties were approximately $24,926. The gain on sale of real estate was approximately $7,290.
	The industrial properties sold prior to January 1, 2015 that met the criteria to be classified as discontinued operations are presented as discontinued operations in the Consolidated Statements of Operations. Income from discontinued operations for the three months ended March 31, 2014 reflects the results of operations of the 25 industrial properties that were sold during the year ended December 31, 2014 and the gain on sale of real estate relating to one industrial property that was sold during the three months ended March 31, 2014.
	The following table discloses certain information regarding the industrial properties included in our discontinued operations for the three months ended March 31, 2014:
		Three Months Ended March 31, 2014
	Total Revenues	$	2,217
	Property Expenses	(952		)
	Depreciation and Amortization	(837		)
	Gain on Sale of Real Estate	432
	Income from Discontinued Operations	$	860

Investments_in_and_Advances_to

Investments in and Advances to Other Real Estate Partnerships	3 Months Ended
	Mar. 31, 2015
Equity Method Investments and Joint Ventures [Abstract]
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:
		March 31,			December 31,
		2015			2014
	ASSETS
	Assets:
	Net Investment in Real Estate	$	279,111		$	278,720
	Note Receivable	77,242			77,242
	Other Assets, Net	25,676			26,884
	Total Assets	$	382,029		$	382,846
	LIABILITIES AND PARTNERS’ CAPITAL
	Liabilities:
	Mortgage Loans Payable	$	80,834		$	81,231
	Other Liabilities, Net	10,116			10,172
	Partners’ Capital	291,079			291,443
	Total Liabilities and Partners’ Capital	$	382,029		$	382,846
	Operating Partnership’s Share of Equity	$	289,827		$	290,221
	Basis Differentials (1)	(77,336		)	(77,180		)
	Carrying Value of the Operating Partnership’s Investments in Other Real Estate Partnerships	$	212,491		$	213,041
	_____________________
	-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 Ended			Three Months Ended
		March 31, 2015			March 31, 2014
	Total Revenues	$	11,513		$	10,325
	Property Expenses	(3,537		)	(3,390		)
	Depreciation and Other Amortization	(3,167		)	(2,721		)
	Gain on Sale of Real Estate	640			—
	Interest Income	568			615
	Interest Expense	(806		)	(1,322		)
	Amortization of Deferred Financing Costs	(33		)	(45		)
	Income from Continuing Operations	5,178			3,462
	Discontinued Operations:
	Loss Attributable to Discontinued Operations	—			(22		)
	Gain on Sale of Real Estate	—			303
	Income from Discontinued Operations	—			281
	Net Income	$	5,178		$	3,743

Indebtedness

Indebtedness	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Indebtedness	5. Indebtedness
	The following table discloses certain information regarding our indebtedness:
		Outstanding Balance at						Interest		Effective  Interest	Maturity  Date
								Rate at		Rate at
								March 31,		Issuance
		31-Mar-15			December 31,			2015
					2014
	Mortgage Loans Payable, Net	$	516,164		$	518,754		4.03% – 8.26%		4.03% – 8.26%	February 2016 –
											Sep-22
	Unamortized Premiums	(83		)	(90		)
	Mortgage Loans Payable, Gross	$	516,081		$	518,664
	Senior Unsecured Notes, Net
	2016 Notes	$	159,635		$	159,621		5.75%		5.91%	1/15/16
	2017 Notes	54,967			54,966			7.50%		7.52%	12/1/17
	2027 Notes	6,067			6,066			7.15%		7.11%	5/15/27
	2028 Notes	31,884			31,884			7.60%		8.13%	7/15/28
	2032 Notes	10,519			10,518			7.75%		7.87%	4/15/32
	2017 II Notes	101,813			101,806			5.95%		6.37%	5/15/17
	Subtotal	$	364,885		$	364,861
	Unamortized Discounts	217			241
	Senior Unsecured Notes, Gross	$	365,102		$	365,102
	Unsecured Term Loan*	$	200,000		$	200,000		1.92%		1.92%	1/29/21
	Unsecured Credit Facility**	$	168,000		$	185,000		1.32%		1.32%	3/11/19
	* We entered into interest rate protection agreements, with an aggregate notional value of $200,000, to effectively convert the variable rate to a fixed rate. See Note 11.
	** The maturity date may be extended an additional year at our election, subject to certain restrictions.
	Mortgage Loans Payable, Net
	As of March 31, 2015, mortgage loans payable are collateralized, and in some instances cross-collateralized, by industrial properties with a net carrying value of $657,451. We believe the Operating Partnership and the Company were in compliance with all covenants relating to mortgage loans payable as of March 31, 2015.
	Unsecured Credit Facility
	On March 10, 2015, we amended and restated our $625,000 revolving credit agreement (the "Old Credit Facility") with a new $625,000 revolving credit agreement (as amended and restated, the "Unsecured Credit Facility"). We may request that the borrowing capacity under the Unsecured Credit Facility be increased to $900,000, subject to certain restrictions. The amendment extended the maturity date from September 29, 2017 to March 11, 2019 with an option to extend an additional one year at our election, subject to certain restrictions. At March 31, 2015, the Unsecured Credit Facility provides for interest only payments at LIBOR plus 115 basis points. The interest rate on the Unsecured Credit Facility varies based on our leverage ratio.
	Indebtedness
	The following is a schedule of the stated maturities and scheduled principal payments of our indebtedness, exclusive of premiums and discounts, for the next five years as of March 31, and thereafter:
		Amount
	Remainder of 2015	$	7,954
	2016	250,164
	2017	166,927
	2018	127,107
	2019	234,432
	Thereafter	462,599
	Total	$	1,249,183
	The Unsecured Credit Facility, our $200,000 unsecured loan (the "Unsecured Term Loan") 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 and Unsecured Term Loan, 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 agreements. We believe that the Operating Partnership and the Company were in compliance with all covenants relating to the Unsecured Credit Facility, Unsecured Term Loan and indentures governing our senior unsecured notes as of March 31, 2015. However, these financial covenants are complex and there can be no assurance that these provisions would not be interpreted by our lenders and noteholders in a manner that could impose and cause us to incur material costs.
	Fair Value
	At March 31, 2015 and December 31, 2014, the fair value of our indebtedness was as follows:
		31-Mar-15						December 31, 2014
		Carrying			Fair			Carrying			Fair
		Amount			Value			Amount			Value
	Mortgage Loans Payable, Net	$	516,164		$	554,470		$	518,754		$	554,118
	Senior Unsecured Notes, Net	364,885			393,061			364,861			395,320
	Unsecured Term Loan	200,000			200,552			200,000			200,575
	Unsecured Credit Facility	168,000			168,000			185,000			185,747
	Total	$	1,249,049		$	1,316,083		$	1,268,615		$	1,335,760
	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 remaining maturities. The current market rates we utilized were internally estimated. The fair value of the senior unsecured notes were 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 notes from companies with profiles similar to ours, as well as overall economic conditions. The fair value of the Unsecured Credit Facility and Unsecured Term Loan 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 each of our mortgage loans payable, senior unsecured notes, Unsecured Term Loan and Unsecured Credit Facility was primarily based upon Level 3 inputs.

Partners_Capital

Partners' Capital	3 Months Ended
	Mar. 31, 2015
Partners' Capital [Abstract]
Partners' Capital	6. Partners’ Capital
	Unit Contributions
	During the three months ended March 31, 2015 and 2014, 9,825 and 131,844 limited partnership Units, respectively, were converted into an equivalent number of general partnership Units, resulting in a reclassification of $95 and $1,279, respectively, between Limited Partners Units and General Partner Units.
	Distributions
	During the three months ended March 31, 2015, we accrued $14,749 General and Limited Partner Unit distributions.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Loss	3 Months Ended
	Mar. 31, 2015
Accumulated Other Comprehensive Loss [Abstract]
Accumulated Other Comprehensive Loss	7. Accumulated Other Comprehensive Loss
	The following tables summarize the changes in accumulated other comprehensive loss by component for the three months ended March 31, 2015 and the reclassifications out of accumulated other comprehensive loss for the three months ended March 31, 2015 and 2014:
		Interest Rate Protection Agreements			Foreign Currency Translation Adjustment			Total
	Balance as of December 31, 2014	$	(14,402	)	$	26		$	(14,376	)
	Other Comprehensive Loss Before Reclassifications	(10,503		)	(26		)	(10,529		)
	Amounts Reclassified from Accumulated Other Comprehensive Loss	14,178			—			14,178
	Net Current Period Other Comprehensive Income (Loss)	3,675			(26		)	3,649
	Balance as of March 31, 2015	$	(10,727	)	$	—		$	(10,727	)
			Amount Reclassified from Accumulated Other Comprehensive Loss
	Details about Accumulated Other Comprehensive Loss Components		Three Months Ended March 31, 2015			Three Months Ended March 31, 2014			Affected Line Item in the Consolidated Statements of Operations
	Interest Rate Protection Agreements
	Reclassification of Fair Value of Interest Rate Protection Agreements (See Note 11)		$	12,990		$	—		Mark-to-Market Loss on Interest Rate Protection Agreements
	Amortization of Interest Rate Protection Agreements (Previously Settled)		131			628			Interest Expense
	Settlement Payments to our Counterparties		1,057			733			Interest Expense
			$	14,178		$	1,361		Total
	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 (loss) 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 $494 into net income by increasing interest expense for interest rate protection agreements we settled in previous periods. Additionally, recurring settlement amounts on the Group I Swaps, as defined in Note 11, will also be reclassified to net income. See Note 11 for more information about our derivatives.

Supplemental_Information_to_St

Supplemental Information to Statements of Cash Flows	3 Months Ended
	Mar. 31, 2015
Supplemental Cash Flow Information [Abstract]
Supplemental Information to Statements of Cash Flows	8. Supplemental Information to Statements of Cash Flows
		Three Months Ended March 31, 2015			Three Months Ended March 31, 2014
	Interest Expense Capitalized in Connection with Development Activity	$	207		$	380
	Supplemental Schedule of Non-Cash Investing and Financing Activities:
	Distribution Payable on General and Limited Partner Units	$	14,912		$	11,921
	Exchange of Limited Partnership Units for General Partnership Units:
	Limited Partnership Units	$	(95	)	$	(1,279	)
	General Partnership Units	95			1,279
	Total	$	—		$	—
	Assumption of Liabilities in Connection with the Acquisition of Real Estate	$	—		$	138
	Accounts Payable Related to Construction in Progress and Additions to Investment in Real Estate	8,045			$	11,657
	Write-off of Fully Depreciated Assets	$	(9,396	)	$	(8,210	)

Earnings_Per_Unit_EPU

Earnings Per Unit (EPU)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Earnings Per Unit (EPU)	9. Earnings Per Unit ("EPU")
	The computation of basic and diluted EPU is presented below:
		Three Months Ended March 31, 2015			Three Months Ended March 31, 2014
	Numerator:
	Income from Continuing Operations	$	2,457		$	4,218
	Income from Continuing Operations Allocable to Participating Securities	(41		)	(21		)
	Preferred Unit Distributions	—			(1,019		)
	Redemption of Preferred Units	—			(1,462		)
	Income from Continuing Operations Available to Unitholders	$	2,416		$	1,716
	Income from Discontinued Operations	$	—		$	860
	Income from Discontinued Operations Allocable to Participating Securities	—			(10		)
	Income from Discontinued Operations Attributable to Unitholders	$	—		$	850
	Net Income Available	$	2,457		$	2,597
	Net Income Allocable to Participating Securities	(41		)	(31		)
	Net Income Available to Unitholders	$	2,416		$	2,566
	Denominator (In Thousands):
	Weighted Average Units—Basic	114,681			114,245
	Effect of Dilutive Securities that Result in the Issuance of General Partner Units:
	LTIP Unit Awards (as defined in Note 10)	365			539
	Weighted Average Units - Diluted	115,046			114,784
	Basic and Diluted EPU:
	Income from Continuing Operations Available to Unitholders	$	0.02		$	0.01
	Income from Discontinued Operations Attributable to Unitholders	$	—		$	0.01
	Net Income Available to Unitholders	$	0.02		$	0.02
	Participating securities include Units that correspond to the Company's 391,721 and 349,331 of unvested restricted stock awards outstanding at March 31, 2015 and 2014, 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.

Stock_Based_Compensation

Stock Based Compensation	3 Months Ended
	Mar. 31, 2015
Share-based Compensation [Abstract]
Stock Based Compensation	10. Stock Based Compensation
	During the three months ended March 31, 2015, we awarded 216,975 shares of restricted stock awards to certain employees, which had a fair value of $4,708 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 were issued based upon the achievement of certain corporate performance goals for the calendar year 2014 and generally vest over a period of three years.
	Compensation expense is charged to earnings over the vesting periods for the shares expected to vest except if the recipient is not required to provide future service in exchange for vesting of such shares. If vesting of a recipient's restricted stock award is not contingent upon future service, the expense is recognized immediately at the date of grant. During the three months ended March 31, 2015, we recognized $1,250 of compensation expense related to restricted stock awards granted to our Chief Executive Officer for which future service was not required.
	Additionally, during the three months ended March 31, 2015, 264,432 Long-Term Incentive Program performance units ("LTIP Unit Awards") were granted to certain employees. We issued Units to the Company in the same amounts. The LTIP Unit Awards had a fair value of $2,531 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 our common stock compared to the TSRs of the MSCI US REIT Index and the NAREIT Industrial Index. The TSR for the granted units is calculated based upon the performance from January 1, 2015 through December 31, 2017. Compensation expense is charged to earnings on a straight-line basis over the performance period. At the end of the performance period 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 TSRs of the MSCI US REIT Index and the NAREIT Industrial Index. The participant is also entitled to dividend equivalents for shares issued pursuant to vested LTIP Unit Awards, which dividend equivalents represent any common dividends that would have been paid with respect to such issued shares after the grant of the LTIP Unit Awards and prior to the date of settlement.
	During the three months ended March 31, 2015 and 2014, we recognized $2,561 and $1,575, respectively, in amortization related to restricted stock awards and LTIP Unit Awards. Restricted stock award and LTIP Unit Award amortization capitalized in connection with development activities was not significant. At March 31, 2015, we had $9,757 in unrecognized compensation related to unvested restricted stock awards and LTIP Unit Awards. The weighted average period that the unrecognized compensation is expected to be recognized is 1.12 years.

Derivatives

Derivatives	3 Months Ended
	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	11. Derivatives
	Our objectives in using derivatives are to add stability to interest expense and to manage our cash flow volatility and exposure to interest rate movements. To accomplish this objective, we primarily use interest rate protection agreements as part of our interest rate risk management strategy. Interest rate protection agreements 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.
	In connection with the origination of the Unsecured Term Loan (see Note 5), during January 2014, we entered into four interest rate protection agreements, with an aggregate notional value of $200,000, to manage our exposure to changes in the one month LIBOR rate (the “Group I Swaps”). The Group I Swaps fix the LIBOR rate at a weighted average rate of 2.29% and mature on January 29, 2021. We designated the Group I Swaps as cash flow hedges.
	In order to maintain our flexibility to pursue an offering of unsecured debt in the future, during August 2014 we entered into three interest rate protection agreements, with an aggregate notional value of $220,000, to manage our exposure to changes in the three month LIBOR rate (the "Group II Swaps"; together with the Group I Swaps, the "Swaps"). The Group II Swaps fix the LIBOR rate at a rate of 2.5795% and are effective from December 1, 2014 through December 1, 2024. At origination, we designated the Group II Swaps as cash flow hedges. During the three months ended March 31, 2015, the Company reclassified the fair market value loss recorded in other comprehensive income relating to the Group II Swaps to earnings as a result of the Company determining that the forecasted offering of unsecured debt was no longer probable to occur within the time period stated in the respective designation memos. For the three months ended March 31, 2015, the reclassified amount was a loss of $12,990 recorded as mark-to-market loss on interest rate protection agreements. As a result of the forecasted transaction becoming not probable to occur within the stated timeframe, the Group II Swaps were de-designated and future changes in fair value will be recorded directly in earnings. See Subsequent Events.
	Our agreements with our derivative counterparties contain provisions where if we default on any of our indebtedness, then we could also be declared in default on our derivative obligations subject to certain thresholds. As of March 31, 2015, we had not posted any collateral related to these agreements and were not in breach of any of the agreement provisions. If we had breached these provisions, we could have been required to settle our obligations under the agreements at their termination value.
	The following table sets forth our financial liabilities related to the Swaps, which are included in Accounts Payable, Accrued Expenses and Other Liabilities on the accompanying consolidated balance sheet and are accounted for at fair value on a recurring basis as of March 31, 2015:
					Fair Value Measurements at Reporting Date Using:
	Description	Fair Value			Quoted Prices in	Significant Other			Unobservable
					Active Markets for	Observable Inputs			Inputs
					Identical Assets	(Level 2)			(Level 3)
					(Level 1)
	Liabilities:
	Derivatives designated as a hedging instrument:
	Group I Swaps	$	(8,735	)	—	$	(8,735	)	—
	Derivatives not designated as a hedging instrument:
	Group II Swaps	$	(12,990	)	—	$	(12,990	)	—
	There was no ineffectiveness recorded on the Group I Swaps during the three months ended March 31, 2015. See Note 7 for more information.
	The estimated fair value of the Swaps was determined using the market standard methodology of netting the discounted fixed cash payments and the discounted expected variable cash receipts. The variable cash receipts are based on an expectation of interest rates (forward curves) derived from observable market interest rate curves. In addition, credit valuation adjustments are incorporated in the fair value to account for potential non-performance risk, including our own non-performance risk and the respective counterparty’s non-performance risk. We determined that the significant inputs used to value the Swaps fell within Level 2 of the fair value hierarchy.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2015
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 March 31, 2015, we had three industrial buildings totaling approximately 0.8 million square feet of GLA under construction. The estimated total investment as of March 31, 2015 is approximately $35,200. Of this amount, approximately $11,000 remains to be funded. There can be no assurance that the actual completion cost will not exceed the estimated total investment stated above.

Subsequent_Events

Subsequent Events	3 Months Ended
	Mar. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	13. Subsequent Events
	From April 1, 2015 to April 29, 2015, we acquired one land parcel for a purchase price of approximately $4,142, excluding costs incurred in conjunction with the acquisition and we sold one land parcel for approximately $495.
	On April 29, 2015, we settled the Group II Swaps for $11,546 of a payment to be made to the counterparties.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Reclassifications	Reclassifications
	Certain reclassifications have been made to the 2014 financial statements to conform to the 2015 presentation.
Discontinued Operations	Discontinued Operations
	Effective January 1, 2015, we adopted Accounting Standards Update ("ASU") No. 2014-08, "Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity" ("ASU 2014-08") for all properties not previously sold. ASU 2014-08 revised the reporting requirements to only allow a component of an entity, or group of components of an entity, to be reported in discontinued operations if the disposal represents a strategic shift that has (or will have) a major effect on an entity’s operations and financial results.  Going forward, we expect the majority of our property dispositions will not qualify as discontinued operations and the results of the dispositions, including gain on sale of real estate, will be presented in Income from Continuing Operations.
Recent Accounting Pronouncements	Recent Accounting Pronouncements
	In February 2015, the FASB issued ASU No. 2015-02, "Consolidation (Topic 810) - Amendments to the Consolidation Analysis" (“ASU 2015-02”). ASU 2015-02 updates consolidation guidance for legal entities such as limited partnerships, limited liability companies and securitization structures in an attempt to simplify consolidation accounting. ASU 2015-02 eliminates the presumption that a general partner should consolidate a limited partnership, modifies the evaluation of whether limited partnerships are variable interest entities or voting interest entities and adds requirements that limited partnerships must meet to qualify as voting interest entities. ASU 2015-02 is effective for fiscal years beginning after December 15, 2015, with early adoption permitted. We are currently assessing the adoption of ASU 2015-02 to determine if it will require us to change from accounting for the Other Real Estate Partnerships under the equity method accounting to consolidation of the Other Real Estate Partnerships within our consolidated financial statements.
	In April 2015, the FASB issued ASU No. 2015-03, "Simplifying the Presentation of Debt Issuance Costs" ("ASU 2015-03"), which amends the current presentation of debt issuance costs in the financial statements. ASU 2015-03 requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts, instead of as an asset. The amendments are to be applied retrospectively and are effective for interim and annual periods beginning after December 15, 2015. The adoption of the new guidance is not expected to have a material impact on our consolidated financial statements.

Investment_in_Real_Estate_Tabl

Investment in Real Estate (Tables)	3 Months Ended
	Mar. 31, 2015
Real Estate [Abstract]
Summary Regarding Industrial Properties Included in Discontinued Operations	The following table discloses certain information regarding the industrial properties included in our discontinued operations for the three months ended March 31, 2014:
		Three Months Ended March 31, 2014
	Total Revenues	$	2,217
	Property Expenses	(952		)
	Depreciation and Amortization	(837		)
	Gain on Sale of Real Estate	432
	Income from Discontinued Operations	$	860

Investments_in_and_Advances_to1

Investments in and Advances to Other Real Estate Partnerships (Tables)	3 Months Ended
	Mar. 31, 2015
Equity Method Investments and Joint Ventures [Abstract]
Condensed Combined Balance Sheet	Condensed Combined Balance Sheets:
		March 31,			December 31,
		2015			2014
	ASSETS
	Assets:
	Net Investment in Real Estate	$	279,111		$	278,720
	Note Receivable	77,242			77,242
	Other Assets, Net	25,676			26,884
	Total Assets	$	382,029		$	382,846
	LIABILITIES AND PARTNERS’ CAPITAL
	Liabilities:
	Mortgage Loans Payable	$	80,834		$	81,231
	Other Liabilities, Net	10,116			10,172
	Partners’ Capital	291,079			291,443
	Total Liabilities and Partners’ Capital	$	382,029		$	382,846
	Operating Partnership’s Share of Equity	$	289,827		$	290,221
	Basis Differentials (1)	(77,336		)	(77,180		)
	Carrying Value of the Operating Partnership’s Investments in Other Real Estate Partnerships	$	212,491		$	213,041
	_____________________
	-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 Ended			Three Months Ended
		March 31, 2015			March 31, 2014
	Total Revenues	$	11,513		$	10,325
	Property Expenses	(3,537		)	(3,390		)
	Depreciation and Other Amortization	(3,167		)	(2,721		)
	Gain on Sale of Real Estate	640			—
	Interest Income	568			615
	Interest Expense	(806		)	(1,322		)
	Amortization of Deferred Financing Costs	(33		)	(45		)
	Income from Continuing Operations	5,178			3,462
	Discontinued Operations:
	Loss Attributable to Discontinued Operations	—			(22		)
	Gain on Sale of Real Estate	—			303
	Income from Discontinued Operations	—			281
	Net Income	$	5,178		$	3,743

Indebtedness_Tables

Indebtedness (Tables)	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Information Regarding Indebtedness	The following table discloses certain information regarding our indebtedness:
		Outstanding Balance at						Interest		Effective  Interest	Maturity  Date
								Rate at		Rate at
								March 31,		Issuance
		31-Mar-15			December 31,			2015
					2014
	Mortgage Loans Payable, Net	$	516,164		$	518,754		4.03% – 8.26%		4.03% – 8.26%	February 2016 –
											Sep-22
	Unamortized Premiums	(83		)	(90		)
	Mortgage Loans Payable, Gross	$	516,081		$	518,664
	Senior Unsecured Notes, Net
	2016 Notes	$	159,635		$	159,621		5.75%		5.91%	1/15/16
	2017 Notes	54,967			54,966			7.50%		7.52%	12/1/17
	2027 Notes	6,067			6,066			7.15%		7.11%	5/15/27
	2028 Notes	31,884			31,884			7.60%		8.13%	7/15/28
	2032 Notes	10,519			10,518			7.75%		7.87%	4/15/32
	2017 II Notes	101,813			101,806			5.95%		6.37%	5/15/17
	Subtotal	$	364,885		$	364,861
	Unamortized Discounts	217			241
	Senior Unsecured Notes, Gross	$	365,102		$	365,102
	Unsecured Term Loan*	$	200,000		$	200,000		1.92%		1.92%	1/29/21
	Unsecured Credit Facility**	$	168,000		$	185,000		1.32%		1.32%	3/11/19
	* We entered into interest rate protection agreements, with an aggregate notional value of $200,000, to effectively convert the variable rate to a fixed rate. See Note 11.
	** The maturity date may be extended an additional year at our election, subject to certain restrictions.
Schedule of Maturities of Long-Term Debt	The following is a schedule of the stated maturities and scheduled principal payments of our indebtedness, exclusive of premiums and discounts, for the next five years as of March 31, and thereafter:
		Amount
	Remainder of 2015	$	7,954
	2016	250,164
	2017	166,927
	2018	127,107
	2019	234,432
	Thereafter	462,599
	Total	$	1,249,183
Summary of Indebtedness at Estimated Fair Value	At March 31, 2015 and December 31, 2014, the fair value of our indebtedness was as follows:
		31-Mar-15						December 31, 2014
		Carrying			Fair			Carrying			Fair
		Amount			Value			Amount			Value
	Mortgage Loans Payable, Net	$	516,164		$	554,470		$	518,754		$	554,118
	Senior Unsecured Notes, Net	364,885			393,061			364,861			395,320
	Unsecured Term Loan	200,000			200,552			200,000			200,575
	Unsecured Credit Facility	168,000			168,000			185,000			185,747
	Total	$	1,249,049		$	1,316,083		$	1,268,615		$	1,335,760

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Loss (Tables)	3 Months Ended
	Mar. 31, 2015
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 three months ended March 31, 2015 and the reclassifications out of accumulated other comprehensive loss for the three months ended March 31, 2015 and 2014:
		Interest Rate Protection Agreements			Foreign Currency Translation Adjustment			Total
	Balance as of December 31, 2014	$	(14,402	)	$	26		$	(14,376	)
	Other Comprehensive Loss Before Reclassifications	(10,503		)	(26		)	(10,529		)
	Amounts Reclassified from Accumulated Other Comprehensive Loss	14,178			—			14,178
	Net Current Period Other Comprehensive Income (Loss)	3,675			(26		)	3,649
	Balance as of March 31, 2015	$	(10,727	)	$	—		$	(10,727	)
Reclassification Out of Accumulated Other Comprehensive Loss
			Amount Reclassified from Accumulated Other Comprehensive Loss
	Details about Accumulated Other Comprehensive Loss Components		Three Months Ended March 31, 2015			Three Months Ended March 31, 2014			Affected Line Item in the Consolidated Statements of Operations
	Interest Rate Protection Agreements
	Reclassification of Fair Value of Interest Rate Protection Agreements (See Note 11)		$	12,990		$	—		Mark-to-Market Loss on Interest Rate Protection Agreements
	Amortization of Interest Rate Protection Agreements (Previously Settled)		131			628			Interest Expense
	Settlement Payments to our Counterparties		1,057			733			Interest Expense
			$	14,178		$	1,361		Total

Supplemental_Information_to_St1

Supplemental Information to Statements of Cash Flows (Tables)	3 Months Ended
	Mar. 31, 2015
Supplemental Cash Flow Information [Abstract]
Cash Flow Information
		Three Months Ended March 31, 2015			Three Months Ended March 31, 2014
	Interest Expense Capitalized in Connection with Development Activity	$	207		$	380
	Supplemental Schedule of Non-Cash Investing and Financing Activities:
	Distribution Payable on General and Limited Partner Units	$	14,912		$	11,921
	Exchange of Limited Partnership Units for General Partnership Units:
	Limited Partnership Units	$	(95	)	$	(1,279	)
	General Partnership Units	95			1,279
	Total	$	—		$	—
	Assumption of Liabilities in Connection with the Acquisition of Real Estate	$	—		$	138
	Accounts Payable Related to Construction in Progress and Additions to Investment in Real Estate	8,045			$	11,657
	Write-off of Fully Depreciated Assets	$	(9,396	)	$	(8,210	)

Earnings_Per_Unit_EPU_Tables

Earnings Per Unit (EPU) (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Unit	The computation of basic and diluted EPU is presented below:
		Three Months Ended March 31, 2015			Three Months Ended March 31, 2014
	Numerator:
	Income from Continuing Operations	$	2,457		$	4,218
	Income from Continuing Operations Allocable to Participating Securities	(41		)	(21		)
	Preferred Unit Distributions	—			(1,019		)
	Redemption of Preferred Units	—			(1,462		)
	Income from Continuing Operations Available to Unitholders	$	2,416		$	1,716
	Income from Discontinued Operations	$	—		$	860
	Income from Discontinued Operations Allocable to Participating Securities	—			(10		)
	Income from Discontinued Operations Attributable to Unitholders	$	—		$	850
	Net Income Available	$	2,457		$	2,597
	Net Income Allocable to Participating Securities	(41		)	(31		)
	Net Income Available to Unitholders	$	2,416		$	2,566
	Denominator (In Thousands):
	Weighted Average Units—Basic	114,681			114,245
	Effect of Dilutive Securities that Result in the Issuance of General Partner Units:
	LTIP Unit Awards (as defined in Note 10)	365			539
	Weighted Average Units - Diluted	115,046			114,784
	Basic and Diluted EPU:
	Income from Continuing Operations Available to Unitholders	$	0.02		$	0.01
	Income from Discontinued Operations Attributable to Unitholders	$	—		$	0.01
	Net Income Available to Unitholders	$	0.02		$	0.02

Derivatives_Tables

Derivatives (Tables)	3 Months Ended
	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value Measurements on Recurring Basis	The following table sets forth our financial liabilities related to the Swaps, which are included in Accounts Payable, Accrued Expenses and Other Liabilities on the accompanying consolidated balance sheet and are accounted for at fair value on a recurring basis as of March 31, 2015:
					Fair Value Measurements at Reporting Date Using:
	Description	Fair Value			Quoted Prices in	Significant Other			Unobservable
					Active Markets for	Observable Inputs			Inputs
					Identical Assets	(Level 2)			(Level 3)
					(Level 1)
	Liabilities:
	Derivatives designated as a hedging instrument:
	Group I Swaps	$	(8,735	)	—	$	(8,735	)	—
	Derivatives not designated as a hedging instrument:
	Group II Swaps	$	(12,990	)	—	$	(12,990	)	—

Organization_and_Formation_of_1

Organization and Formation of Partnership - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2015
	Property
	sqft
	State
	Joint_Ventures
Organization And Formation Of Partnership [Line Items]
Ownership interest of sole general partner	96.20%
Ownership interest of limited partners	3.80%
Number of joint ventures	2
Number of industrial properties sold	8
Gross leasable area (GLA) of industrial properties sold	500,000
Number of industrial properties owned	568
Number of states in which industrial properties are located	24
Gross leasable area (GLA) of industrial properties owned	55,100,000
2003 Net Lease Joint Venture
Organization And Formation Of Partnership [Line Items]
Noncontrolling equity ownership interest	15.00%
Number of industrial properties sold	1
Gross leasable area (GLA) of industrial properties sold	800,000
2007 Europe Joint Venture
Organization And Formation Of Partnership [Line Items]
Noncontrolling equity ownership interest	10.00%
Number of industrial properties owned	0
Other Real Estate Partnerships
Organization And Formation Of Partnership [Line Items]
Minimum ownership interest in limited partnerships	99.00%
Number of limited partners	8
Minimum ownership interest of limited partnerships	0.01%
Number of industrial properties owned	61
Gross leasable area (GLA) of industrial properties owned	7,900,000

Investment_in_Real_Estate_Addi

Investment in Real Estate - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
	Property	Property	Property
	sqft
	Land_Parcel
Real Estate [Abstract]
Number of industrial properties held for sale	1
Gross leasable area (GLA) of industrial properties held for sale	200,000
Number of land parcels held for sale	1
Number of industrial properties sold	8
Gross leasable area (GLA) of industrial properties sold	500,000
Proceeds from the sale of industrial properties	$24,926
Gain on sale of real estate	$7,290	$432
Number of sold industrial properties included in discontinued operations		1	25

Investment_in_Real_Estate_Summ

Investment in Real Estate - Summary Regarding Industrial Properties Included in Discontinued Operations (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Real Estate [Abstract]
Total Revenues		$2,217
Property Expenses		-952
Depreciation and Amortization		-837
Gain on Sale of Real Estate	0	432
Income from Discontinued Operations	$0	$860

Investments_in_and_Advances_to2

Investments in and Advances to Other Real Estate Partnerships - Condensed Combined Balance Sheets (Detail) (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Thousands, unless otherwise specified
Assets:
Net Investment in Real Estate	$2,089,551		$2,117,671
Total Assets	2,473,778		2,514,246
Liabilities:
Mortgage Loans Payable, Net	516,164		518,754
Partners’ Capital	1,092,327		1,100,510
Total Liabilities and Partners’ Capital	2,473,778		2,514,246
Carrying Value of the Operating Partnership’s Investments in Other Real Estate Partnerships	212,491		213,041
Other Real Estate Partnerships
Assets:
Net Investment in Real Estate	279,111		278,720
Note Receivable	77,242		77,242
Other Assets, Net	25,676		26,884
Total Assets	382,029		382,846
Liabilities:
Mortgage Loans Payable, Net	80,834		81,231
Other Liabilities, Net	10,116		10,172
Partners’ Capital	291,079		291,443
Total Liabilities and Partners’ Capital	382,029		382,846
Operating Partnership’s Share of Equity	289,827		290,221
Basis Differentials (1)	-77,336	[1]	-77,180	[1]
Carrying Value of the Operating Partnership’s Investments in Other Real Estate Partnerships	$212,491		$213,041
[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 Statements of Operations (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Schedule Of Condensed Combined Statements of Operations [Line Items]
Total Revenues	$78,429	$73,536
Property Expenses	-26,254	-26,926
Depreciation and Other Amortization	-25,139	-25,150
Gain on Sale of Real Estate	7,290	0
Interest Income	24	724
Interest Expense	-15,836	-17,724
Amortization of Deferred Financing Costs	-713	-759
Income from Continuing Operations	2,457	4,218
Discontinued Operations:
Loss Attributable to Discontinued Operations	0	428
Gain on Sale of Real Estate	0	432
Income from Discontinued Operations	0	860
Net Income	2,457	5,078
Other Real Estate Partnerships
Schedule Of Condensed Combined Statements of Operations [Line Items]
Total Revenues	11,513	10,325
Property Expenses	-3,537	-3,390
Depreciation and Other Amortization	-3,167	-2,721
Gain on Sale of Real Estate	640	0
Interest Income	568	615
Interest Expense	-806	-1,322
Amortization of Deferred Financing Costs	-33	-45
Income from Continuing Operations	5,178	3,462
Discontinued Operations:
Loss Attributable to Discontinued Operations	0	-22
Gain on Sale of Real Estate	0	303
Income from Discontinued Operations	0	281
Net Income	$5,178	$3,743

Indebtedness_Information_Regar

Indebtedness - Information Regarding Indebtedness (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Debt Instrument [Line Items]
Mortgage Loans Payable, Net	$516,164		$518,754
Senior Unsecured Notes, Net	364,885		364,861
Unsecured Term Loan	200,000		200,000
Unsecured Credit Facility	168,000		185,000
2016 Notes
Debt Instrument [Line Items]
Senior Unsecured Notes, Net	159,635		159,621
Unsecured Term Loan Interest Rate	5.75%
Effective Interest Rate	5.91%
Maturity Date	15-Jan-16
2017 Notes
Debt Instrument [Line Items]
Senior Unsecured Notes, Net	54,967		54,966
Unsecured Term Loan Interest Rate	7.50%
Effective Interest Rate	7.52%
Maturity Date	1-Dec-17
2027 Notes
Debt Instrument [Line Items]
Senior Unsecured Notes, Net	6,067		6,066
Unsecured Term Loan Interest Rate	7.15%
Effective Interest Rate	7.11%
Maturity Date	15-May-27
2028 Notes
Debt Instrument [Line Items]
Senior Unsecured Notes, Net	31,884		31,884
Unsecured Term Loan Interest Rate	7.60%
Effective Interest Rate	8.13%
Maturity Date	15-Jul-28
2032 Notes
Debt Instrument [Line Items]
Senior Unsecured Notes, Net	10,519		10,518
Unsecured Term Loan Interest Rate	7.75%
Effective Interest Rate	7.87%
Maturity Date	15-Apr-32
2017 II Notes
Debt Instrument [Line Items]
Senior Unsecured Notes, Net	101,813		101,806
Unsecured Term Loan Interest Rate	5.95%
Effective Interest Rate	6.37%
Maturity Date	15-May-17
Mortgage Loans Payable
Debt Instrument [Line Items]
Mortgage Loans Payable, Net	516,164		518,754
Unamortized Premiums	-83		-90
Mortgage Loans Payable, Gross	516,081		518,664
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-Feb-16
Maturity Date Range, End	1-Sep-22
Senior Unsecured Notes
Debt Instrument [Line Items]
Senior Unsecured Notes, Net	364,885		364,861
Unamortized Discounts	217		241
Senior Unsecured Notes, Gross	365,102		365,102
Unsecured Term Loan
Debt Instrument [Line Items]
Unsecured Term Loan	200,000	[1]	200,000	[1]
Unsecured Term Loan Interest Rate	1.92%	[1]
Effective Interest Rate	1.92%	[1]
Maturity Date	29-Jan-21	[1]
Unsecured Credit Facility
Debt Instrument [Line Items]
Unsecured Credit Facility	$168,000		$185,000
Unsecured Credit Facility Interest Rate	1.32%	[2]
Effective Interest Rate	1.32%	[2]
Maturity Date	11-Mar-19	[2]
[1]	We entered into interest rate protection agreements, with an aggregate notional value of $200,000, to effectively convert the variable rate to a fixed rate. See Note 11.
[2]	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
In Thousands, unless otherwise specified	Mar. 31, 2015	Jul. 19, 2013	Mar. 10, 2015
Debt Disclosure [Line Items]
Unsecured Credit Facility, current borrowing capacity		$625,000
Mortgage Loans Payable
Debt Disclosure [Line Items]
Carrying value of industrial properties held under mortgages	657,451
Unsecured Credit Facility
Debt Disclosure [Line Items]
Unsecured Credit Facility, current borrowing capacity			625,000
Unsecured Credit Facility, additional borrowing capacity	900,000
Number of years Unsecured Credit Facility may be extended	1 year
Unsecured Credit Facility, interest rate description	115
Unsecured Term Loan
Debt Disclosure [Line Items]
Unsecured Term Loan, face amount	200,000
Interest Rate Protection Agreement
Debt Disclosure [Line Items]
Interest rate protection agreement, notional amount	$200,000

Indebtedness_Schedule_of_Matur

Indebtedness - Schedule of Maturities of Long-Term Debt (Detail) (USD $)	Mar. 31, 2015
In Thousands, unless otherwise specified
Debt Disclosure [Abstract]
Remainder of 2015	$7,954
2016	250,164
2017	166,927
2018	127,107
2019	234,432
Thereafter	462,599
Total	$1,249,183

Indebtedness_Summary_of_Indebt

Indebtedness - Summary of Indebtedness at Estimated Fair Value (Detail) (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Thousands, unless otherwise specified
Debt Disclosure [Line Items]
Mortgage Loans Payable, Net, Carrying Amount	$516,164		$518,754
Senior Unsecured Notes, Net, Carrying Amount	364,885		364,861
Unsecured Term Loan, Carrying Amount	200,000		200,000
Unsecured Credit Facility, Carrying Amount	168,000		185,000
Total, Carrying Amount	1,249,049		1,268,615
Total, Fair Value	1,316,083		1,335,760
Mortgage Loans Payable, Net
Debt Disclosure [Line Items]
Mortgage Loans Payable, Net, Carrying Amount	516,164		518,754
Mortgage Loans Payable, Net, Fair Value	554,470		554,118
Senior Unsecured Notes, Net
Debt Disclosure [Line Items]
Senior Unsecured Notes, Net, Carrying Amount	364,885		364,861
Senior Unsecured Notes, Net, Fair Value	393,061		395,320
Unsecured Term Loan
Debt Disclosure [Line Items]
Unsecured Term Loan, Carrying Amount	200,000	[1]	200,000	[1]
Unsecured Term Loan, Fair Value	200,552		200,575
Unsecured Credit Facility
Debt Disclosure [Line Items]
Unsecured Credit Facility, Carrying Amount	168,000		185,000
Unsecured Credit Facility, Fair Value	$168,000		$185,747
[1]	We entered into interest rate protection agreements, with an aggregate notional value of $200,000, to effectively convert the variable rate to a fixed rate. See Note 11.

Partners_Capital_Additional_In

Partners' Capital - Additional Information (Detail) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Partners' Capital [Abstract]
Limited Partnership Units converted to General Partnership Units	9,825	131,844
Reclassification of Partner's Capital	$95	$1,279
Total distributions of Limited Partnership and General Partnership Units	$14,749

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Loss (Changes in AOCI) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax
Balance	($14,376)
Other Comprehensive Loss Before Reclassifications	-10,529
Amounts Reclassified from Accumulated Other Comprehensive Loss	14,178
Net Current Period Other Comprehensive Income (Loss)	3,649
Balance	-10,727
Interest Rate Protection Agreements
Accumulated Other Comprehensive Income (Loss), Net of Tax
Balance	-14,402
Other Comprehensive Loss Before Reclassifications	-10,503
Amounts Reclassified from Accumulated Other Comprehensive Loss	14,178
Net Current Period Other Comprehensive Income (Loss)	3,675
Balance	-10,727
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax
Balance	26
Other Comprehensive Loss Before Reclassifications	-26
Amounts Reclassified from Accumulated Other Comprehensive Loss	0
Net Current Period Other Comprehensive Income (Loss)	-26
Balance	$0

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Loss (Amounts Reclassified from AOCI) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Mark-to-Market Loss on Interest Rate Protection Agreements	($12,990)	$0
Interest Expense	15,836	17,724
Total	-22,225	-17,759
Reclassification Out Of Accumulated Other Comprehensive Income | Interest Rate Protection Agreements
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total	14,178	1,361
Interest Rate Contract | Reclassification Out Of Accumulated Other Comprehensive Income | Interest Rate Protection Agreements
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest Expense	131	628
Interest Rate Swap | Reclassification Out Of Accumulated Other Comprehensive Income | Interest Rate Protection Agreements
Accumulated Other Comprehensive Income (Loss) [Line Items]
Mark-to-Market Loss on Interest Rate Protection Agreements	12,990	0
Interest Expense	$1,057	$733

Accumulated_Other_Comprehensiv4

Accumulated Other Comprehensive Loss - Additional Information (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015
Accumulated Other Comprehensive Loss [Abstract]
Amoritzation to be reclassified from OCI into income	$494

Supplemental_Information_to_St2

Supplemental Information to Statements of Cash Flows - Cash Flow Information (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Supplemental Cash Flow Information [Line Items]
Interest Expense Capitalized in Connection with Development Activity	$207	$380
Supplemental Schedule of Non-Cash Investing and Financing Activities:
Distribution Payable on General and Limited Partner Units	14,912
Exchange of Limited Partnership Units for General Partnership Units:
Conversion of Limited Partner Units to General Partner Units	0	0
Assumption of Liabilities in Connection with the Acquisition of Real Estate	0	138
Accounts Payable Related to Construction in Progress and Additions to Investment in Real Estate	8,045	11,657
Write-off of Fully Depreciated Assets	-9,396	-8,210
General Partner Units
Exchange of Limited Partnership Units for General Partnership Units:
Conversion of Limited Partner Units to General Partner Units	95	1,279
Limited Partner Units
Exchange of Limited Partnership Units for General Partnership Units:
Conversion of Limited Partner Units to General Partner Units	-95	-1,279
General and Limited Partner Units
Supplemental Schedule of Non-Cash Investing and Financing Activities:
Distribution Payable on General and Limited Partner Units	$14,912	$11,921

Earnings_Per_Unit_EPU_Computat

Earnings Per Unit (EPU) - Computation of Basic and Diluted EPU (Detail) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Numerator:
Income from Continuing Operations	$2,457	$4,218
Income from Continuing Operations Allocable to Participating Securities	-41	-21
Preferred Unit Distributions	0	-1,019
Redemption of Preferred Units	0	-1,462
Income from Continuing Operations Available to Unitholders	2,416	1,716
Income from Discontinued Operations	0	860
Income from Discontinued Operations Allocable to Participating Securities	0	-10
Income from Discontinued Operations Attributable to Unitholders	0	850
Net Income Available	2,457	2,597
Net Income Allocable to Participating Securities	-41	-31
Net Income Available to Unitholders	$2,416	$2,566
Denominator (In Thousands):
Weighted Average Units—Basic	114,681	114,245
LTIP Unit Awards (as defined in Note 10)	365	539
Weighted Average Units - Diluted	115,046	114,784
Basic and Diluted EPU:
Income from Continuing Operations Available to Unitholders	$0.02	$0.01
Income from Discontinued Operations Attributable to Unitholders	$0	$0.01
Net Income Available to Unitholders	$0.02	$0.02

Earnings_Per_Unit_EPU_Addition

Earnings Per Unit (EPU) - Additional Information (Detail)	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share [Abstract]
Unvested restricted stock awards	391,721	349,331

Stock_Based_Compensation_Addit

Stock Based Compensation - Additional Information (Detail) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amortization related to restricted stock awards and LTIP Unit Awards	$2,561	$1,575
Unrecognized compensation related to unvested restricted stock and unit awards	9,757
Weighted average period of unrecognized compensation expected to be recognized	1 year 1 month 15 days
Long-Term Incentive Program | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	0.00%
Long-Term Incentive Program | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	100.00%
Management | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock and unit awards to employees	216,975
Fair value of restricted stock and unit awards	4,708
Vesting period of restricted stock	3 years
Compensation expense recognized at date of grant	1,250
Management | Long-Term Incentive Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock and unit awards to employees	264,432
Fair value of restricted stock and unit awards	$2,531

Derivatives_Additional_Informa

Derivatives - Additional Information (Detail) (USD $)	3 Months Ended		0 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Jan. 29, 2014	Aug. 01, 2014
Derivative [Line Items]
Mark-to-Market Loss on Interest Rate Protection Agreements	$12,990	$0
Group I Swaps
Derivative [Line Items]
Swaps, number of instruments held			4
Swaps, notional amount			200,000
Swaps, variable rate			one month LIBOR
Swaps, weighted average fixed rate			2.29%
Group II Swaps
Derivative [Line Items]
Swaps, number of instruments held				3
Swaps, notional amount				$220,000
Swaps, variable rate				three month LIBOR
Swaps, weighted average fixed rate				2.58%

Derivatives_Fair_Value_Measure

Derivatives - Fair Value Measurements on Recurring Basis (Detail) (USD $)	Mar. 31, 2015
In Thousands, unless otherwise specified
Fair Value on Recurring Basis [Line Items]
Group I Swaps	($8,735)
Group II Swaps	-12,990
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value on Recurring Basis [Line Items]
Group I Swaps	0
Group II Swaps	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value on Recurring Basis [Line Items]
Group I Swaps	-8,735
Group II Swaps	-12,990
Fair Value, Measurements, Recurring | Unobservable Inputs (Level 3)
Fair Value on Recurring Basis [Line Items]
Group I Swaps	0
Group II Swaps	$0

Commitments_and_Contingencies_

Commitments and Contingencies - Additional Information (Detail) (USD $)	Mar. 31, 2015
In Thousands, unless otherwise specified	sqft
	Buildings
Commitments and Contingencies Disclosure [Abstract]
Number of industrial properties under construction	3
Gross leasable area (GLA) of industrial properties under construction	800,000
Estimated total investment	$35,200
Estimated total investment remaining to be funded	$11,000

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (USD $)	3 Months Ended		1 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Apr. 29, 2015
			Land_Parcel
			Property
Subsequent Event [Line Items]
Purchase price of land parcels acquired	$0	$13,262
Proceeds from the sale of land parcels	24,926
Subsequent Events
Subsequent Event [Line Items]
Number of land parcels acquired			1
Purchase price of land parcels acquired			4,142
Number of land parcels sold			1
Proceeds from the sale of land parcels			495
Settlement payment on Group II Swaps			$11,546