Temporary equity decrease from redemption of units during the period

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Amount of increase to additional paid-in capital (APIC) from recognition of equity-based compensation.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).

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The number of general partner units outstanding.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The number of limited partner units outstanding.

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Decrease in noncontrolling interest (for example, but not limited to, redeeming or purchasing the interests of noncontrolling shareholders, issuance of shares (interests) by the non-wholly owned subsidiary to the parent entity for other than cash, and a buyback of shares (interest) by the non-wholly owned subsidiary from the noncontrolling interests).

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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Amount after income tax of income (loss) including the portion attributable to nonredeemable noncontrolling interest. Excludes the portion attributable to redeemable noncontrolling interest recognized as temporary equity.

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Amount after tax and reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Amount before tax, after reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Total contributions made by each class of partners (i.e., general, limited and preferred partners).

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Total distributions to each class of partners (i.e., general, limited and preferred partners).

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Total change in each class of partners' capital accounts during the year due to exchanges and conversions. Partners include general, limited and preferred partners.

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The number of units converted into shares of each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners.

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Total units issued during the year due to the sale of units. All partners include general, limited and preferred partners.

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The number of shares issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit).

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Number of new stock issued during the period.

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Value of stock issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit).

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Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

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Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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Carrying amount, attributable to parent and noncontrolling interests, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.

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The portion of net income or loss attributable to temporary equity interest.

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Amount of increase (decrease) in temporary equity from changes classified as other.

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Consolidated Statements of Equity - USD ($) $ in Thousands	Total	COMMON SHARES OF BENEFICIAL INTEREST	ADDITIONAL PAID-IN CAPITAL	ACCUMULATED OTHER COMPREHENSIVE LOSS	DISTRIBUTIONS IN EXCESS OF NET INCOME	TOTAL LIBERTY PROPERTY TRUST SHAREHOLDERS’ EQUITY	NONCONTROLLING INTEREST - OPERATING PARTNERSHIP	NONCONTROLLING INTEREST - CONSOLIDATED JOINT VENTURES	Common shares	Liberty Property Limited Partnership	Liberty Property Limited Partnership GENERAL PARTNER	Liberty Property Limited Partnership LIMITED PARTNER	Liberty Property Limited Partnership NONCONTROLLING INTEREST - CONSOLIDATED JOINT VENTURES	Liberty Property Limited Partnership TOTAL OWNERS’ EQUITY	Liberty Property Limited Partnership Common Units GENERAL PARTNER	Liberty Property Limited Partnership Common Units LIMITED PARTNER	Liberty Property Limited Partnership, Preferred Activity
Common shares outstanding - Beginning Balance (shares) at Dec. 31, 2017									147,450,691
General Partner's units outstanding - Beginning Balance (units) at Dec. 31, 2017															147,450,691
Limited Partners' units outstanding - Beginning Balance (units) at Dec. 31, 2017																3,520,205
Beginning balance at Dec. 31, 2017	$ 3,148,366	$ 147	$ 3,674,978	$ (37,797)	$ (549,970)	$ 3,087,358	$ 56,159	$ 4,849			$ 3,087,358	$ 56,159	$ 4,849	$ 3,148,366
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net proceeds from the issuance of common shares	4,527	1	4,526			4,527
Net proceeds from issuance of common shares (shares)									345,927
Net income	164,379				159,795	159,795	3,806	778			159,795	3,806	778	164,379
Net income available to common shareholders	159,795									$ 163,601
Contributions from partners											11,528			11,528
Contributions from partners (units)															345,927
Distributions to partners											(118,211)	(2,914)	(204)	(121,329)
Distributions	(121,329)				(118,211)	(118,211)	(2,914)	(204)
Share-based compensation	7,001		7,001			7,001
Other comprehensive loss - foreign currency translation activity	(6,206)			(6,062)		(6,062)	(144)			(6,206)	(6,062)	(144)		(6,206)
Other comprehensive income (loss) - derivative instruments	487			476		476	11			487	476	11		487
Common shares outstanding - Ending Balance (shares) at Jun. 30, 2018									147,796,618
General Partner's units outstanding - Ending Balance (units) at Jun. 30, 2018															147,796,618
Limited Partners' units outstanding - Ending Balance (units) at Jun. 30, 2018																3,520,205
Ending balance at Jun. 30, 2018	3,197,225	148	3,686,505	(43,383)	(508,386)	3,134,884	56,918	5,423			3,134,884	56,918	5,423	3,197,225
Noncontrolling Interest - Operating Partnership (Mezzanine) - Beginning Balance at Dec. 31, 2017	7,537																$ 7,537
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income (Mezzanine)	236																236
Distributions	(236)																(236)
Noncontrolling Interest - Operating Partnership (Mezzanine) - Ending Balance at Jun. 30, 2018	7,537																7,537
Common shares outstanding - Beginning Balance (shares) at Mar. 31, 2018									147,773,141
General Partner's units outstanding - Beginning Balance (units) at Mar. 31, 2018															147,773,141
Limited Partners' units outstanding - Beginning Balance (units) at Mar. 31, 2018																3,520,205
Beginning balance at Mar. 31, 2018	3,248,288	148	3,683,660	(29,674)	(468,883)	3,185,251	58,186	4,851			3,185,251	58,186	4,851	3,248,288
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net proceeds from the issuance of common shares	1,260	0	1,260			1,260
Net proceeds from issuance of common shares (shares)									23,477
Net income	20,772				19,614	19,614	467	691			19,614	467	691	20,772
Net income available to common shareholders	19,614									20,081
Contributions from partners											2,845			2,845
Contributions from partners (units)															23,477
Distributions to partners											(59,117)	(1,408)	(119)	(60,644)
Distributions	(60,644)				(59,117)	(59,117)	(1,408)	(119)
Share-based compensation	1,585		1,585			1,585
Other comprehensive loss - foreign currency translation activity	(14,138)			(13,809)		(13,809)	(329)			(14,138)	(13,809)	(329)		(14,138)
Other comprehensive income (loss) - derivative instruments	102			100		100	2			$ 102	100	2		102
Common shares outstanding - Ending Balance (shares) at Jun. 30, 2018									147,796,618
General Partner's units outstanding - Ending Balance (units) at Jun. 30, 2018															147,796,618
Limited Partners' units outstanding - Ending Balance (units) at Jun. 30, 2018																3,520,205
Ending balance at Jun. 30, 2018	3,197,225	148	3,686,505	(43,383)	(508,386)	3,134,884	56,918	5,423			3,134,884	56,918	5,423	3,197,225
Noncontrolling Interest - Operating Partnership (Mezzanine) - Beginning Balance at Mar. 31, 2018	7,537																7,537
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income (Mezzanine)	118																118
Distributions	(118)																(118)
Noncontrolling Interest - Operating Partnership (Mezzanine) - Ending Balance at Jun. 30, 2018	$ 7,537																7,537
Common shares outstanding - Beginning Balance (shares) at Dec. 31, 2018	147,899,354								147,899,354	147,899,354
General Partner's units outstanding - Beginning Balance (units) at Dec. 31, 2018															147,899,354
Limited Partners' units outstanding - Beginning Balance (units) at Dec. 31, 2018	3,520,205									3,520,205						3,520,205
Beginning balance at Dec. 31, 2018	$ 3,396,772	148	3,691,778	(55,243)	(306,822)	3,329,861	61,471	5,440		$ 3,396,772	3,329,861	61,471	5,440	3,396,772
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net proceeds from the issuance of common shares	4,999	0	4,999			4,999
Net proceeds from issuance of common shares (shares)									390,773
Net income	157,916						3,649	167			154,100	3,649	167	157,916
Net income available to common shareholders	154,100					154,100				157,749
Contributions from partners											8,532	0	0	8,532
Contributions from partners (units)															390,773
Distributions to partners											(121,589)	(3,099)	(167)	(124,855)
Distributions	(124,855)				(121,589)	(121,589)	(3,099)	(167)
Share-based compensation	3,533		3,533			3,533
Other comprehensive loss - foreign currency translation activity	(518)			(507)		(507)	(11)			(518)	(507)	(11)	0	(518)
Other comprehensive income (loss) - derivative instruments	(1,970)			(1,924)		(1,924)	(46)			$ (1,970)	(1,924)	(46)	0	(1,970)
Acquisition of noncontrolling interest	$ (18,513)	0	(13,350)	0	0	(13,350)	0	(5,163)			(13,350)	0	(5,163)	(18,513)		$ 0
Redemption of noncontrolling interests - common units (shares)									7,156						7,156
Redemption of noncontrolling interest - common units			125			125	(125)
Redemption of limited partners common units for common shares											125	(125)
Redemption of limited partners common units for common shares (units)																(7,156)
Common shares outstanding - Ending Balance (shares) at Jun. 30, 2019									148,297,283	148,297,283
General Partner's units outstanding - Ending Balance (units) at Jun. 30, 2019															148,297,283
Limited Partners' units outstanding - Ending Balance (units) at Jun. 30, 2019	3,513,049									3,513,049						3,513,049
Ending balance at Jun. 30, 2019	$ 3,417,364	148	3,687,085	(57,674)	(274,311)	3,355,248	61,839	277		$ 3,417,364	3,355,248	61,839	277	3,417,364
Noncontrolling Interest - Operating Partnership (Mezzanine) - Beginning Balance at Dec. 31, 2018	7,537									7,537							7,537
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income (Mezzanine)	168																168
Distributions	(168)																(168)
Temporary Equity Decrease from Redemption of Units	(2,200)																(2,200)
Noncontrolling Interest - Operating Partnership (Mezzanine) - Ending Balance at Jun. 30, 2019	5,337									5,337							5,337
Common shares outstanding - Beginning Balance (shares) at Mar. 31, 2019									148,258,042
General Partner's units outstanding - Beginning Balance (units) at Mar. 31, 2019															148,258,042
Limited Partners' units outstanding - Beginning Balance (units) at Mar. 31, 2019																3,520,205
Beginning balance at Mar. 31, 2019	3,398,813	148	3,697,783	(51,803)	(313,279)	3,332,849	61,280	4,684			3,332,849	61,280	4,684	3,398,813
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net proceeds from the issuance of common shares	1,090	0	1,090	0	0	1,090	0	0
Net proceeds from issuance of common shares (shares)									32,085
Net income	102,251	0	0	0	99,769	99,769	2,359	123			99,769	2,359	123	102,251
Net income available to common shareholders	99,769									102,128
Contributions from partners											2,527	0	0	2,527
Contributions from partners (units)															32,085
Distributions to partners											(60,801)	(1,536)	(123)	(62,460)
Distributions	(62,460)	0	0	0	(60,801)	(60,801)	(1,536)	(123)
Share-based compensation	1,437	0	1,437	0	0	1,437	0	0
Other comprehensive loss - foreign currency translation activity	(5,894)	0	0	(5,758)	0	(5,758)	(136)	0		(5,894)	(5,758)	(136)	0	(5,894)
Other comprehensive income (loss) - derivative instruments	(116)	0	0	(113)	0	(113)	(3)	0		$ (116)	(113)	(3)	0	(116)
Acquisition of noncontrolling interest	(17,757)	0	(13,350)	0	0	(13,350)	0	(4,407)			(13,350)	0	(4,407)	(17,757)
Redemption of noncontrolling interests - common units (shares)									7,156						7,156
Redemption of noncontrolling interest - common units	$ 0	0	125	0	0	125	(125)	0
Redemption of limited partners common units for common shares											125	(125)
Redemption of limited partners common units for common shares (units)																(7,156)
Common shares outstanding - Ending Balance (shares) at Jun. 30, 2019									148,297,283	148,297,283
General Partner's units outstanding - Ending Balance (units) at Jun. 30, 2019															148,297,283
Limited Partners' units outstanding - Ending Balance (units) at Jun. 30, 2019	3,513,049									3,513,049						3,513,049
Ending balance at Jun. 30, 2019	$ 3,417,364	$ 148	$ 3,687,085	$ (57,674)	$ (274,311)	$ 3,355,248	$ 61,839	$ 277		$ 3,417,364	$ 3,355,248	$ 61,839	$ 277	$ 3,417,364
Noncontrolling Interest - Operating Partnership (Mezzanine) - Beginning Balance at Mar. 31, 2019	5,337																5,337
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income (Mezzanine)	84																84
Distributions	(84)																(84)
Noncontrolling Interest - Operating Partnership (Mezzanine) - Ending Balance at Jun. 30, 2019	$ 5,337									$ 5,337							$ 5,337