10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

__________________________________________________________

FORM 10-Q

__________________________________________________________

(Mark One)

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

For the quarterly period ended June 30, 2019

OR

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

For the transition period from              to             

Commission file numbers: 1-13130 (Liberty Property Trust)

1-13132 (Liberty Property Limited Partnership) 

__________________________________________________________

LIBERTY PROPERTY TRUST

LIBERTY PROPERTY LIMITED PARTNERSHIP

(Exact name of registrants as specified in their governing documents)

__________________________________________________________

MARYLAND (Liberty Property Trust)		23-7768996
PENNSYLVANIA (Liberty Property Limited Partnership)		23-2766549
(State or other jurisdiction of incorporation or organization)		(I.R.S. Employer Identification Number)
650 East Swedesford Road
Wayne,	Pennsylvania	19087
(Address of Principal Executive Offices)		(Zip Code)

Registrants’ Telephone Number, Including Area Code (610) 648-1700

(Former Name, Former Address and Former Fiscal Year, if Changed Since Last Report)

__________________________________________________________

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Shares of Beneficial Interest, $0.001 par value	LPT	New York Stock Exchange

Indicate by check mark whether the registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding twelve (12) months (or for such shorter period that the registrants were required to file such reports), and (2) have been subject to such filing requirements for the past ninety (90) days.    Yes  x    No  o

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  x    No  o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. (See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act). (Check one):

Large Accelerated Filer	x	Accelerated Filer	o
Non-Accelerated Filer	o	Smaller Reporting Company	o
		Emerging Growth Company	o

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  o    No  x

On July 30, 2019 148,426,042 Common Shares of Beneficial Interest, par value $0.001 per share, of Liberty Property Trust were outstanding.

EXPLANATORY NOTE

This report combines the quarterly reports on Form 10-Q for the period ended June 30, 2019 of Liberty Property Trust and Liberty Property Limited Partnership. Unless stated otherwise or the context otherwise requires, references to the “Trust” mean Liberty Property Trust and its consolidated subsidiaries, and references to the “Operating Partnership” mean Liberty Property Limited Partnership and its consolidated subsidiaries. The terms the “Company,” “we,” “our” and “us” mean the Trust and the Operating Partnership, collectively.

The Trust is a self-administered and self-managed Maryland real estate investment trust (“REIT”). Substantially all of the Trust's assets are owned directly or indirectly, and substantially all of the Trust's operations are conducted directly or indirectly, by its subsidiary, the Operating Partnership, a Pennsylvania limited partnership.

The Trust is the sole general partner and also a limited partner of the Operating Partnership, owning 97.7% of the common equity of the Operating Partnership at June 30, 2019. The common units of limited partnership interest in the Operating Partnership (the “Common Units”), other than those owned by the Trust, are exchangeable on a one-for-one basis (subject to anti-dilution protections) for the Trust's common shares of beneficial interest, $0.001 par value per share (the “Common Shares”).

The financial results of the Operating Partnership are consolidated into the financial statements of the Trust. The Trust has no significant assets other than its investment in the Operating Partnership. The Trust and the Operating Partnership are managed and operated as one entity. The Trust and the Operating Partnership have the same managers.

The Trust's sole business purpose is to act as the general partner of the Operating Partnership. Net proceeds from equity issuances by the Trust are contributed to the Operating Partnership in exchange for partnership units. The Trust itself does not issue any indebtedness, but guarantees certain of the unsecured debt of the Operating Partnership.

We believe combining the quarterly reports on Form 10-Q of the Trust and the Operating Partnership into this single report results in the following benefits:

• enhances investors' understanding of the Trust and the Operating Partnership by enabling investors to view the business as a whole in the same manner as management views and operates the business;

• eliminates duplicative disclosure and provides a more streamlined and readable presentation since a substantial portion of the Company's disclosure applies to both the Trust and the Operating Partnership; and

• creates time and cost efficiencies through the preparation of one combined report instead of two separate reports.

To help investors understand the significant differences between the Trust and the Operating Partnership, this report presents the following separate sections for each of the Trust and the Operating Partnership:

• consolidated financial statements;

• the following notes to the consolidated financial statements;

◦ Income per Common Share of the Trust and Income per Common Unit of the Operating Partnership;

◦ Noncontrolling Interests of the Trust and Limited Partners' Equity and Noncontrolling Interest of the Operating Partnership

This report also includes separate Item 4. Controls and Procedures sections and separate Exhibit 31 and 32 certifications for each of the Trust and the Operating Partnership in order to establish that the Chief Executive Officer and the Chief Financial Officer of each entity have made the requisite certifications and that the Trust and Operating Partnership are compliant with Rule 13a-15 and Rule 15d-15 of the Securities Exchange Act of 1934, as amended.

2

Liberty Property Trust/Liberty Property Limited Partnership

Form 10-Q for the period ended June 30, 2019

Index		Page
PART I.	FINANCIAL INFORMATION
Item 1.	Financial Statements
	Consolidated balance sheets of Liberty Property Trust at June 30, 2019 and December 31, 2018	5
	Consolidated statements of comprehensive income of Liberty Property Trust for the three months ended June 30, 2019 and June 30, 2018	6
	Consolidated statements of comprehensive income of Liberty Property Trust for the six months ended June 30, 2019 and June 30, 2018	7
	Consolidated statements of equity of Liberty Property Trust for the three months ended June 30, 2019 and June 30, 2018	8
	Consolidated statements of equity of Liberty Property Trust for the six months ended June 30, 2019 and June 30, 2018	9
	Consolidated statements of cash flows of Liberty Property Trust for the six months ended June 30, 2019 and June 30, 2018	10
	Consolidated balance sheets of Liberty Property Limited Partnership at June 30, 2019 and December 31, 2018	11
	Consolidated statements of comprehensive income of Liberty Property Limited Partnership for the three months ended June 30, 2019 and June 30, 2018	12
	Consolidated statements of comprehensive income of Liberty Property Limited Partnership for the six months ended June 30, 2019 and June 30, 2018	13
	Consolidated statements of owners' equity of Liberty Property Limited Partnership for the three months ended June 30, 2019 and June 30, 2018	14
	Consolidated statements of owners' equity of Liberty Property Limited Partnership for the six months ended June 30, 2019 and June 30, 2018	15
	Consolidated statements of cash flows of Liberty Property Limited Partnership for the six months ended June 30, 2019 and June 30, 2018	16
	Notes to consolidated financial statements of the Company	17
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	34
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	47
Item 4.	Controls and Procedures	47
PART II.	OTHER INFORMATION	49
Item 1.	Legal Proceedings	49
Item 1A.	Risk Factors	49
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	49
Item 3.	Defaults Upon Senior Securities	49

3

Index		Page
Item 4.	Mine Safety Disclosures	49
Item 5.	Other Information	49
Item 6.	Exhibits	50
Signatures for Liberty Property Trust		51
Signatures for Liberty Property Limited Partnership		52
	CERTIFICATION OF CEO OF LIBERTY PROPERTY TRUST REQUIRED BY RULE 13A-14(A)
	CERTIFICATION OF CFO OF LIBERTY PROPERTY TRUST REQUIRED BY RULE 13A-14(A)
	CERTIFICATION OF CEO OF LIBERTY PROPERTY TRUST, IN ITS CAPACITY AS THE GENERAL PARTNER OF LIBERTY PROPERTY LIMITED PARTNERSHIP, REQUIRED BY RULE 13A-14(A)
	CERTIFICATION OF CFO OF LIBERTY PROPERTY TRUST, IN ITS CAPACITY AS THE GENERAL PARTNER OF LIBERTY PROPERTY LIMITED PARTNERSHIP, REQUIRED BY RULE 13A-14(A)
	CERTIFICATION OF CEO OF LIBERTY PROPERTY TRUST REQUIRED BY RULE 13A-14(B)
	CERTIFICATION OF CFO OF LIBERTY PROPERTY TRUST REQUIRED BY RULE 13A-14(B)
	CERTIFICATION OF CEO OF LIBERTY PROPERTY TRUST, IN ITS CAPACITY AS THE GENERAL PARTNER OF LIBERTY PROPERTY LIMITED PARTNERSHIP, REQUIRED BY RULE 13A-14(B)
	CERTIFICATION OF CFO OF LIBERTY PROPERTY TRUST, IN ITS CAPACITY AS THE GENERAL PARTNER OF LIBERTY PROPERTY LIMITED PARTNERSHIP, REQUIRED BY RULE 13A-14(B)
	XBRL Instance Document
	XBRL Taxonomy Extension Schema Document
	XBRL Taxonomy Extension Calculation Linkbase Document
	XBRL Taxonomy Extension Definition Linkbase Document
	XBRL Extension Labels Linkbase
	XBRL Taxonomy Extension Presentation Linkbase Document

4

PART I. FINANCIAL INFORMATION

Item 1. Financial Statements

CONSOLIDATED BALANCE SHEETS OF LIBERTY PROPERTY TRUST

(Unaudited and in thousands, except share and unit amounts)

	June 30, 2019			December 31, 2018
ASSETS
Real estate:
Land and land improvements	$	1,339,483		$	1,236,514
Building and improvements	4,612,859			4,397,049
Less accumulated depreciation	(1,004,624		)	(941,299		)
Operating real estate	4,947,718			4,692,264
Development in progress	416,035			462,572
Land held for development	303,135			296,244
Net real estate	5,666,888			5,451,080
Cash and cash equivalents	21,039			84,923
Restricted cash	17,392			10,899
Accounts receivable	12,458			14,109
Deferred rent receivable	118,230			111,372
Deferred financing and leasing costs, net of accumulated amortization (June 30, 2019, $183,418; December 31, 2018, $165,553)	163,566			157,823
Investments in and advances to unconsolidated joint ventures	350,768			350,981
Assets held for sale	386,726			502,207
Right of use asset	17,931			—
Prepaid expenses and other assets	127,261			251,000
Total assets	$	6,882,259		$	6,934,394
LIABILITIES
Mortgage loans, net	$	351,493		$	395,202
Unsecured notes, net	2,632,881			2,285,698
Credit facilities	100,000			411,846
Accounts payable	46,405			62,943
Accrued interest	28,021			22,309
Dividend and distributions payable	62,241			60,560
Lease liabilities	18,617			—
Other liabilities	200,867			270,396
Liabilities held for sale	19,033			21,131
Total liabilities	3,459,558			3,530,085
Noncontrolling interest - operating partnership - 213,483 and 301,483 preferred units outstanding as of June 30, 2019 and December 31, 2018, respectively	5,337			7,537
EQUITY
Liberty Property Trust shareholders’ equity
Common shares of beneficial interest, $.001 par value, 283,987,000 shares authorized; 148,297,283 and 147,899,354 shares issued and outstanding as of June 30, 2019 and December 31, 2018, respectively	148			148
Additional paid-in capital	3,687,085			3,691,778
Accumulated other comprehensive loss	(57,674		)	(55,243		)
Distributions in excess of net income	(274,311		)	(306,822		)
Total Liberty Property Trust shareholders’ equity	3,355,248			3,329,861
Noncontrolling interest – operating partnership - 3,513,049 and 3,520,205 common units outstanding as of June 30, 2019 and December 31, 2018, respectively	61,839			61,471
Noncontrolling interest – consolidated joint ventures	277			5,440
Total equity	3,417,364			3,396,772
Total liabilities, noncontrolling interest - operating partnership and equity	$	6,882,259		$	6,934,394

See accompanying notes.

5

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME OF LIBERTY PROPERTY TRUST

(Unaudited and in thousands, except per share amounts)

	Three Months Ended
	June 30, 2019			June 30, 2018
REVENUE
Rental revenue	$	160,359		$	146,107
Development service fee income	978			19,824
Total revenue	161,337			165,931
EXPENSES
Rental property	14,104			13,247
Real estate taxes	23,487			21,793
General and administrative	9,693			8,832
Leasing expense	3,318			2,767
Other operating expense	3,256			1,577
Interest expense	25,406			21,454
Depreciation and amortization	43,032			40,076
Development service fee expense	847			79,808
Impairment charges - real estate assets	—			26,000
Total expenses	123,143			215,554
Interest and other income	7,998			2,700
Gain on property dispositions	5,462			48,584
Equity in earnings of unconsolidated joint ventures	2,181			7,428
Income from continuing operations before income taxes	53,835			9,089
Income taxes	261			(911		)
Income from continuing operations	54,096			8,178
Discontinued operations (including gain on asset sales, net of impairments and debt extinguishment loss, of $41.2 million and a net loss, of $0.2 million for the three months ended June 30, 2019 and 2018, respectively)	48,239			12,712
Net income	102,335			20,890
Noncontrolling interest – operating partnership	(2,443		)	(585		)
Noncontrolling interest – consolidated joint ventures	(123		)	(691		)
Net income available to common shareholders	$	99,769		$	19,614
Net income	$	102,335		$	20,890
Other comprehensive loss - foreign currency translation	(5,894		)	(14,138		)
Other comprehensive (loss) income - derivative instruments	(116		)	102
Other comprehensive loss	(6,010		)	(14,036		)
Total comprehensive income	96,325			6,854
Less: comprehensive income attributable to noncontrolling interest	(2,427		)	(949		)
Comprehensive income attributable to common shareholders	$	93,898		$	5,905
Earnings per common share
Basic:
Income from continuing operations	$	0.36		$	0.05
Income from discontinued operations	0.32			0.08
Income per common share – basic	$	0.68		$	0.13
Diluted:
Income from continuing operations	$	0.35		$	0.05
Income from discontinued operations	0.32			0.08
Income per common share – diluted	$	0.67		$	0.13
Weighted average number of common shares outstanding
Basic	147,805			147,274
Diluted	148,668			148,333
Amounts attributable to common shareholders
Income from continuing operations	$	52,764		$	7,308
Discontinued operations	47,005			12,306
Net income available to common shareholders	$	99,769		$	19,614

See accompanying notes.

6

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME OF LIBERTY PROPERTY TRUST

(Unaudited and in thousands, except per share amounts)

	Six Months Ended
	June 30, 2019			June 30, 2018
REVENUE
Rental revenue	$	316,732		$	291,482
Development service fee income	1,842			46,176
Total revenue	318,574			337,658
EXPENSES
Rental property	27,768			26,464
Real estate taxes	45,860			43,295
General and administrative	25,298			23,159
Leasing expense	6,526			5,579
Other operating expense	5,524			4,079
Interest expense	50,903			42,944
Depreciation and amortization	86,430			79,582
Development service fee expense	1,680			107,875
Impairment charges - real estate assets	99			26,000
Total expenses	250,088			358,977
Interest and other income	11,256			5,220
Gain on property dispositions	5,957			52,742
Equity in earnings of unconsolidated joint ventures	9,190			14,192
Income from continuing operations before income taxes	94,889			50,835
Income taxes	(571		)	(1,440		)
Income from continuing operations	94,318			49,395
Discontinued operations (including gain on asset sales, net of impairments and debt extinguishment loss, of $50.1 million and $89.8 million and for the six months ended June 30, 2019 and 2018, respectively)	63,766			115,220
Net income	158,084			164,615
Noncontrolling interest – operating partnership	(3,817		)	(4,042		)
Noncontrolling interest – consolidated joint ventures	(167		)	(778		)
Net income available to common shareholders	$	154,100		$	159,795
Net income	$	158,084		$	164,615
Other comprehensive loss - foreign currency translation	(518		)	(6,206		)
Other comprehensive (loss) income - derivative instruments	(1,970		)	487
Other comprehensive loss	(2,488		)	(5,719		)
Total comprehensive income	155,596			158,896
Less: comprehensive income attributable to noncontrolling interest	(3,927		)	(4,687		)
Comprehensive income attributable to common shareholders	$	151,669		$	154,209
Earnings per common share
Basic:
Income from continuing operations	$	0.62		$	0.33
Income from discontinued operations	0.42			0.76
Income per common share – basic	$	1.04		$	1.09
Diluted:
Income from continuing operations	$	0.62		$	0.32
Income from discontinued operations	0.42			0.76
Income per common share – diluted	$	1.04		$	1.08
Weighted average number of common shares outstanding
Basic	147,706			147,184
Diluted	148,606			148,104
Amounts attributable to common shareholders
Income from continuing operations	$	92,000		$	47,447
Discontinued operations	62,100			112,348
Net income available to common shareholders	$	154,100		$	159,795

See accompanying notes.

7

CONSOLIDATED STATEMENTS OF EQUITY OF LIBERTY PROPERTY TRUST

(Unaudited and in thousands)

	Three Months Ended June 30, 2019
	NUMBER OF COMMON SHARES	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			TOTAL EQUITY			NONCONTROLLING INTEREST - OPERATING PARTNERSHIP (MEZZANINE)
Balance at April 1, 2019	148,258,042	$	148	$	3,697,783		$	(51,803	)	$	(313,279	)	$	3,332,849		$	61,280		$	4,684		$	3,398,813		$	5,337
Net proceeds from the issuance of common shares	32,085	—		1,090			—			—			1,090			—			—			1,090			—
Net income	—	—		—			—			99,769			99,769			2,359			123			102,251			84
Distributions	—	—		—			—			(60,801		)	(60,801		)	(1,536		)	(123		)	(62,460		)	(84		)
Share-based compensation net of shares related to tax withholdings	—	—		1,437			—			—			1,437			—			—			1,437			—
Other comprehensive loss - foreign currency translation	—	—		—			(5,758		)	—			(5,758		)	(136		)	—			(5,894		)	—
Other comprehensive loss - derivative instruments	—	—		—			(113		)	—			(113		)	(3		)	—			(116		)	—
Acquisition of noncontrolling interest	—	—		(13,350		)	—			—			(13,350		)	—			(4,407		)	(17,757		)	—
Redemption of noncontrolling interests – common units	7,156	—		125			—			—			125			(125		)	—			—			—
Balance at June 30, 2019	148,297,283	$	148	$	3,687,085		$	(57,674	)	$	(274,311	)	$	3,355,248		$	61,839		$	277		$	3,417,364		$	5,337

	Three Months Ended June 30, 2018
	NUMBER OF COMMON SHARES	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			TOTAL EQUITY			NONCONTROLLING INTEREST - OPERATING PARTNERSHIP (MEZZANINE)
Balance at April 1, 2018	147,773,141	$	148	$	3,683,660	$	(29,674	)	$	(468,883	)	$	3,185,251		$	58,186		$	4,851		$	3,248,288		$	7,537
Net proceeds from the issuance of common shares	23,477	—		1,260		—			—			1,260			—			—			1,260			—
Net income	—	—		—		—			19,614			19,614			467			691			20,772			118
Distributions	—	—		—		—			(59,117		)	(59,117		)	(1,408		)	(119		)	(60,644		)	(118		)
Share-based compensation net of shares related to tax withholdings	—	—		1,585		—			—			1,585			—			—			1,585			—
Other comprehensive loss - foreign currency translation	—	—		—		(13,809		)	—			(13,809		)	(329		)	—			(14,138		)	—
Other comprehensive income - derivative instruments	—	—		—		100			—			100			2			—			102			—
Balance at June 30, 2018	147,796,618	$	148	$	3,686,505	$	(43,383	)	$	(508,386	)	$	3,134,884		$	56,918		$	5,423		$	3,197,225		$	7,537

See accompanying notes.

8

CONSOLIDATED STATEMENTS OF EQUITY OF LIBERTY PROPERTY TRUST

(Unaudited and in thousands)

	Six Months Ended June 30, 2019
	NUMBER OF COMMON SHARES	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			TOTAL EQUITY			NONCONTROLLING INTEREST - OPERATING PARTNERSHIP (MEZZANINE)
Balance at January 1, 2019	147,899,354	$	148	$	3,691,778		$	(55,243	)	$	(306,822	)	$	3,329,861		$	61,471		$	5,440		$	3,396,772		$	7,537
Net proceeds from the issuance of common shares	390,773	—		4,999			—			—			4,999			—			—			4,999			—
Net income	—	—		—			—			154,100			154,100			3,649			167			157,916			168
Distributions	—	—		—			—			(121,589		)	(121,589		)	(3,099		)	(167		)	(124,855		)	(168		)
Share-based compensation net of shares related to tax withholdings	—	—		3,533			—			—			3,533			—			—			3,533			—
Other comprehensive loss - foreign currency translation	—	—		—			(507		)	—			(507		)	(11		)	—			(518		)	—
Other comprehensive loss - derivative instruments	—	—		—			(1,924		)	—			(1,924		)	(46		)	—			(1,970		)	—
Acquisition of noncontrolling interest	—	—		(13,350		)	—			—			(13,350		)	—			(5,163		)	(18,513		)	—
Redemption of noncontrolling interests – common units	7,156	—		125			—			—			125			(125		)	—			—			—
Redemption of noncontrolling interest - preferred units	—	—		—			—			—			—			—			—			—			(2,200		)
Balance at June 30, 2019	148,297,283	$	148	$	3,687,085		$	(57,674	)	$	(274,311	)	$	3,355,248		$	61,839		$	277		$	3,417,364		$	5,337

	Six Months Ended June 30, 2018
	NUMBER OF COMMON SHARES	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			TOTAL EQUITY			NONCONTROLLING INTEREST - OPERATING PARTNERSHIP (MEZZANINE)
Balance at January 1, 2018	147,450,691	$	147	$	3,674,978	$	(37,797	)	$	(549,970	)	$	3,087,358		$	56,159		$	4,849		$	3,148,366		$	7,537
Net proceeds from the issuance of common shares	345,927	1		4,526		—			—			4,527			—			—			4,527			—
Net income	—	—		—		—			159,795			159,795			3,806			778			164,379			236
Distributions	—	—		—		—			(118,211		)	(118,211		)	(2,914		)	(204		)	(121,329		)	(236		)
Share-based compensation net of shares related to tax withholdings	—	—		7,001		—			—			7,001			—			—			7,001			—
Other comprehensive loss - foreign currency translation	—	—		—		(6,062		)	—			(6,062		)	(144		)	—			(6,206		)	—
Other comprehensive income - derivative instruments	—	—		—		476			—			476			11			—			487			—
Balance at June 30, 2018	147,796,618	$	148	$	3,686,505	$	(43,383	)	$	(508,386	)	$	3,134,884		$	56,918		$	5,423		$	3,197,225		$	7,537

See accompanying notes.

9

CONSOLIDATED STATEMENTS OF CASH FLOWS OF LIBERTY PROPERTY TRUST

(Unaudited and in thousands)

	Six Months Ended
	June 30, 2019			June 30, 2018
OPERATING ACTIVITIES
Net income	$	158,084		$	164,615
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	88,708			88,459
Amortization of deferred financing costs	2,311			1,922
Expensed pursuit costs	208			383
Impairment charges - real estate assets	14,391			26,000
Loss on debt extinguishment	7,618			—
Equity in earnings of unconsolidated joint ventures	(9,190		)	(14,192		)
Gain on property dispositions	(77,981		)	(142,514		)
Share-based compensation	11,073			11,261
Development service fee accrual	—			62,256
Other	(8,179		)	(2,069		)
Changes in operating assets and liabilities:
Accounts receivable	1,534			2,446
Deferred rent receivable	(7,925		)	(10,289		)
Prepaid expenses and other assets	6,514			27,199
Accounts payable	(15,769		)	(5,341		)
Accrued interest	5,712			285
Other liabilities	(64,743		)	(11,798		)
Net cash provided by operating activities	112,366			198,623
INVESTING ACTIVITIES
Investment in properties – acquisitions	(156,870		)	(211,335		)
Investment in properties – other	(18,836		)	(22,104		)
Investments in and advances to unconsolidated joint ventures	(4,809		)	(73,922		)
Distributions from unconsolidated joint ventures	14,139			16,522
Net proceeds from disposition of properties/land	210,970			313,055
Investment in development in progress	(119,124		)	(96,196		)
Investment in land held for development	(22,966		)	(105,827		)
Payment of deferred leasing costs	(19,943		)	(13,399		)
Release of escrows and other	109,546			126,203
Net cash used in investing activities	(7,893		)	(67,003		)
FINANCING ACTIVITIES
Net proceeds from issuance of common shares	4,999			4,527
Share repurchases, including shares related to tax withholdings	(8,601		)	(4,500		)
Redemption of preferred units	(2,200		)	—
Proceeds from unsecured notes	349,097			—
Repayments of mortgage loans including prepayment penalty	(49,915		)	(30,377		)
Proceeds from credit facility	122,505			698,163
Repayments on credit facility	(434,351		)	(662,879		)
Payment of deferred financing costs	(3,120		)	—
Acquisition of noncontrolling interests	(18,513		)	—
Distribution paid on common shares	(119,941		)	(118,089		)
Distribution to partners/noncontrolling interests	(3,401		)	(3,296		)
Net cash used in financing activities	(163,441		)	(116,451		)
Net (decrease) increase in cash, cash equivalents and restricted cash	(58,968		)	15,169
Increase (decrease) in cash, cash equivalents and restricted cash related to foreign currency translation	1,577			(1,778		)
Cash, cash equivalents and restricted cash at beginning of period	95,822			25,685
Cash, cash equivalents and restricted cash at end of period	$	38,431		$	39,076

See accompanying notes.

10

CONSOLIDATED BALANCE SHEETS OF

LIBERTY PROPERTY LIMITED PARTNERSHIP

(Unaudited and in thousands, except unit amounts)

	June 30, 2019			December 31, 2018
ASSETS
Real estate:
Land and land improvements	$	1,339,483		$	1,236,514
Building and improvements	4,612,859			4,397,049
Less accumulated depreciation	(1,004,624		)	(941,299		)
Operating real estate	4,947,718			4,692,264
Development in progress	416,035			462,572
Land held for development	303,135			296,244
Net real estate	5,666,888			5,451,080
Cash and cash equivalents	21,039			84,923
Restricted cash	17,392			10,899
Accounts receivable	12,458			14,109
Deferred rent receivable	118,230			111,372
Deferred financing and leasing costs, net of accumulated amortization (June 30, 2019, $183,418; December 31, 2018, $165,553)	163,566			157,823
Investments in and advances to unconsolidated joint ventures	350,768			350,981
Assets held for sale	386,726			502,207
Right of use asset	17,931			—
Prepaid expenses and other assets	127,261			251,000
Total assets	$	6,882,259		$	6,934,394
LIABILITIES
Mortgage loans, net	$	351,493		$	395,202
Unsecured notes, net	2,632,881			2,285,698
Credit facilities	100,000			411,846
Accounts payable	46,405			62,943
Accrued interest	28,021			22,309
Distributions payable	62,241			60,560
Lease liabilities	18,617			—
Other liabilities	200,867			270,396
Liabilities held for sale	19,033			21,131
Total liabilities	3,459,558			3,530,085
Limited partners’ equity - 213,483 and 301,483 preferred units outstanding as of June 30, 2019 and December 31, 2018, respectively	5,337			7,537
OWNERS’ EQUITY
General partner’s equity - 148,297,283 and 147,899,354 common units outstanding as of June 30, 2019 and December 31, 2018, respectively	3,355,248			3,329,861
Limited partners’ equity – 3,513,049 and 3,520,205 common units outstanding as of June 30, 2019 and December 31, 2018, respectively	61,839			61,471
Noncontrolling interest – consolidated joint ventures	277			5,440
Total owners’ equity	3,417,364			3,396,772
Total liabilities, limited partners’ equity and owners’ equity	$	6,882,259		$	6,934,394

See accompanying notes.

11

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME OF

LIBERTY PROPERTY LIMITED PARTNERSHIP

(Unaudited and in thousands, except per unit amounts)

 

	Three Months Ended
	June 30, 2019			June 30, 2018
REVENUE
Rental revenue	$	160,359		$	146,107
Development service fee income	978			19,824
Total revenue	161,337			165,931
EXPENSES
Rental property	14,104			13,247
Real estate taxes	23,487			21,793
General and administrative	9,693			8,832
Leasing expense	3,318			2,767
Other operating expense	3,256			1,577
Interest expense	25,406			21,454
Depreciation and amortization	43,032			40,076
Development service fee expense	847			79,808
Impairment charges - real estate assets	—			26,000
Total expenses	123,143			215,554
Interest and other income	7,998			2,700
Gain on property dispositions	5,462			48,584
Equity in earnings of unconsolidated joint ventures	2,181			7,428
Income from continuing operations before income taxes	53,835			9,089
Income taxes	261			(911		)
Income from continuing operations	54,096			8,178
Discontinued operations (including gain on asset sales, net of impairments and debt extinguishment loss, of $41.2 million and a net loss, of $0.2 million for the three months ended June 30, 2019 and 2018, respectively)	48,239			12,712
Net income	102,335			20,890
Noncontrolling interest – consolidated joint ventures	(123		)	(691		)
Preferred unit distributions	(84		)	(118		)
Net income available to common unitholders	$	102,128		$	20,081
Net income	$	102,335		$	20,890
Other comprehensive loss - foreign currency translation	(5,894		)	(14,138		)
Other comprehensive (loss) income - derivative instruments	(116		)	102
Other comprehensive loss	(6,010		)	(14,036		)
Total comprehensive income	$	96,325		$	6,854
Earnings per common unit
Basic:
Income from continuing operations	$	0.36		$	0.05
Income from discontinued operations	0.32			0.08
Income per common unit - basic	$	0.68		$	0.13
Diluted:
Income from continuing operations	$	0.35		$	0.05
Income from discontinued operations	0.32			0.08
Income per common unit - diluted	$	0.67		$	0.13
Weighted average number of common units outstanding
Basic	151,319			150,794
Diluted	152,182			151,853
Net income allocated to general partners	$	99,769		$	19,614
Net income allocated to limited partners	$	2,443		$	585

See accompanying notes.

12

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME OF

LIBERTY PROPERTY LIMITED PARTNERSHIP

(Unaudited and in thousands, except per unit amounts)

	Six Months Ended
	June 30, 2019			June 30, 2018
REVENUE
Rental revenue	$	316,732		$	291,482
Development service fee income	1,842			46,176
Total revenue	318,574			337,658
EXPENSES
Rental property	27,768			26,464
Real estate taxes	45,860			43,295
General and administrative	25,298			23,159
Leasing expense	6,526			5,579
Other operating expense	5,524			4,079
Interest expense	50,903			42,944
Depreciation and amortization	86,430			79,582
Development service fee expense	1,680			107,875
Impairment charges - real estate assets	99			26,000
Total expenses	250,088			358,977
Interest and other income	11,256			5,220
Gain on property dispositions	5,957			52,742
Equity in earnings of unconsolidated joint ventures	9,190			14,192
Income from continuing operations before income taxes	94,889			50,835
Income taxes	(571		)	(1,440		)
Income from continuing operations	94,318			49,395
Discontinued operations (including gain on asset sales, net of impairments and debt extinguishment loss, of $50.1 million and $89.8 million and for the six months ended June 30, 2019 and 2018, respectively)	63,766			115,220
Net income	158,084			164,615
Noncontrolling interest – consolidated joint ventures	(167		)	(778		)
Preferred unit distributions	(168		)	(236		)
Income available to common unitholders	$	157,749		$	163,601
Net income	$	158,084		$	164,615
Other comprehensive loss - foreign currency translation	(518		)	(6,206		)
Other comprehensive (loss) income - derivative instruments	(1,970		)	487
Other comprehensive loss	(2,488		)	(5,719		)
Total comprehensive income	$	155,596		$	158,896
Earnings per common unit
Basic:
Income from continuing operations	$	0.62		$	0.33
Income from discontinued operations	0.42			0.76
Income per common unit - basic	$	1.04		$	1.09
Diluted:
Income from continuing operations	$	0.62		$	0.32
Income from discontinued operations	0.42			0.76
Income per common unit - diluted	$	1.04		$	1.08
Weighted average number of common units outstanding
Basic	151,223			150,704
Diluted	152,123			151,624
Net income allocated to general partners	$	154,100		$	159,795
Net income allocated to limited partners	$	3,817		$	4,042

See accompanying notes.

13

CONSOLIDATED STATEMENTS OF OWNERS’ EQUITY OF LIBERTY PROPERTY LIMITED PARTNERSHIP

(Unaudited and in thousands)

	Three Months Ended June 30, 2019
	GENERAL PARTNER'S COMMON UNITS	LIMITED PARTNERS' COMMON UNITS		GENERAL PARTNER’S EQUITY			LIMITED PARTNERS’ EQUITY  – COMMON UNITS			NONCONTROLLING INTEREST – CONSOLIDATED JOINT VENTURES			TOTAL OWNERS’ EQUITY			LIMITED PARTNERS' EQUITY - PREFERRED
Balance at April 1, 2019	148,258,042	3,520,205		$	3,332,849		$	61,280		$	4,684		$	3,398,813		$	5,337
Contributions from partners	32,085	—		2,527			—			—			2,527			—
Distributions to partners	—	—		(60,801		)	(1,536		)	(123		)	(62,460		)	(84		)
Other comprehensive loss - foreign currency translation	—	—		(5,758		)	(136		)	—			(5,894		)	—
Other comprehensive loss - derivative instruments	—	—		(113		)	(3		)	—			(116		)	—
Net income	—	—		99,769			2,359			123			102,251			84
Redemption of limited partners common units for common shares	7,156	(7,156	)	125			(125		)	—			—			—
Acquisition of noncontrolling interest				(13,350		)	—			(4,407		)	(17,757		)	—
Balance at June 30, 2019	148,297,283	3,513,049		$	3,355,248		$	61,839		$	277		$	3,417,364		$	5,337

	Three Months Ended June 30, 2018
	GENERAL PARTNER'S COMMON UNITS	LIMITED PARTNERS' COMMON UNITS	GENERAL PARTNER’S EQUITY			LIMITED PARTNERS’ EQUITY  – COMMON UNITS			NONCONTROLLING INTEREST – CONSOLIDATED JOINT VENTURES			TOTAL OWNERS’ EQUITY			LIMITED PARTNERS' EQUITY - PREFERRED
Balance at April 1, 2018	147,773,141	3,520,205	$	3,185,251		$	58,186		$	4,851		$	3,248,288		$	7,537
Contributions from partners	23,477	—	2,845			—			—			2,845			—
Distributions to partners	—	—	(59,117		)	(1,408		)	(119		)	(60,644		)	(118		)
Other comprehensive loss - foreign currency translation	—	—	(13,809		)	(329		)	—			(14,138		)	—
Other comprehensive income - derivative instruments	—	—	100			2			—			102			—
Net income	—	—	19,614			467			691			20,772			118
Balance at June 30, 2018	147,796,618	3,520,205	$	3,134,884		$	56,918		$	5,423		$	3,197,225		$	7,537

See accompanying notes.

14

CONSOLIDATED STATEMENTS OF OWNERS’ EQUITY OF LIBERTY PROPERTY LIMITED PARTNERSHIP

(Unaudited and in thousands)

	Six Months Ended June 30, 2019
	GENERAL PARTNER'S COMMON UNITS	LIMITED PARTNERS' COMMON UNITS		GENERAL PARTNER’S EQUITY			LIMITED PARTNERS’ EQUITY  – COMMON UNITS			NONCONTROLLING INTEREST – CONSOLIDATED JOINT VENTURES			TOTAL OWNERS’ EQUITY			LIMITED PARTNERS' EQUITY - PREFERRED
Balance at January 1, 2019	147,899,354	3,520,205		$	3,329,861		$	61,471		$	5,440		$	3,396,772		$	7,537
Contributions from partners	390,773	—		8,532			—			—			8,532			—
Distributions to partners	—	—		(121,589		)	(3,099		)	(167		)	(124,855		)	(168		)
Other comprehensive loss - foreign currency translation	—	—		(507		)	(11		)	—			(518		)	—
Other comprehensive loss - derivative instruments	—	—		(1,924		)	(46		)	—			(1,970		)	—
Net income	—	—		154,100			3,649			167			157,916			168
Redemption of limited partners common units for common shares	7,156	(7,156	)	125			(125		)	—			—			—
Acquisition of noncontrolling interest	—	—		(13,350		)	—			(5,163		)	(18,513		)	—
Redemption of noncontrolling interest preferred units	—	—		—			—			—			—			(2,200		)
Balance at June 30, 2019	148,297,283	3,513,049		$	3,355,248		$	61,839		$	277		$	3,417,364		$	5,337

	Six Months Ended June 30, 2018
	GENERAL PARTNER'S COMMON UNITS	LIMITED PARTNERS' COMMON UNITS	GENERAL PARTNER’S EQUITY			LIMITED PARTNERS’ EQUITY  – COMMON UNITS			NONCONTROLLING INTEREST – CONSOLIDATED JOINT VENTURES			TOTAL OWNERS’ EQUITY			LIMITED PARTNERS' EQUITY - PREFERRED
Balance at January 1, 2018	147,450,691	3,520,205	$	3,087,358		$	56,159		$	4,849		$	3,148,366		$	7,537
Contributions from partners	345,927	—	11,528			—			—			11,528			—
Distributions to partners	—	—	(118,211		)	(2,914		)	(204		)	(121,329		)	(236		)
Other comprehensive loss - foreign currency translation	—	—	(6,062		)	(144		)	—			(6,206		)	—
Other comprehensive income - derivative instruments	—	—	476			11			—			487			—
Net income	—	—	159,795			3,806			778			164,379			236
Balance at June 30, 2018	147,796,618	3,520,205	$	3,134,884		$	56,918		$	5,423		$	3,197,225		$	7,537

See accompanying notes.

15

CONSOLIDATED STATEMENTS OF CASH FLOWS OF

LIBERTY PROPERTY LIMITED PARTNERSHIP

(Unaudited and in thousands)

	Six Months Ended
	June 30, 2019			June 30, 2018
OPERATING ACTIVITIES
Net income	$	158,084		$	164,615
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	88,708			88,459
Amortization of deferred financing costs	2,311			1,922
Expensed pursuit costs	208			383
Impairment charges - real estate assets	14,391			26,000
Loss on debt extinguishment	7,618			—
Equity in earnings of unconsolidated joint ventures	(9,190		)	(14,192		)
Gain on property dispositions	(77,981		)	(142,514		)
Noncash compensation	11,073			11,261
Development service fee accrual	—			62,256
Other	(8,179		)	(2,069		)
Changes in operating assets and liabilities:
Accounts receivable	1,534			2,446
Deferred rent receivable	(7,925		)	(10,289		)
Prepaid expenses and other assets	6,514			27,199
Accounts payable	(15,769		)	(5,341		)
Accrued interest	5,712			285
Other liabilities	(64,743		)	(11,798		)
Net cash provided by operating activities	112,366			198,623
INVESTING ACTIVITIES
Investment in properties – acquisitions	(156,870		)	(211,335		)
Investment in properties – other	(18,836		)	(22,104		)
Investments in and advances to unconsolidated joint ventures	(4,809		)	(73,922		)
Distributions from unconsolidated joint ventures	14,139			16,522
Net proceeds from disposition of properties/land	210,970			313,055
Investment in development in progress	(119,124		)	(96,196		)
Investment in land held for development	(22,966		)	(105,827		)
Payment of deferred leasing costs	(19,943		)	(13,399		)
Release of escrows and other	109,546			126,203
Net cash used in investing activities	(7,893		)	(67,003		)
FINANCING ACTIVITIES
Redemption of preferred units	(2,200		)	—
Proceeds from unsecured notes	349,097			—
Repayments of mortgage loans including prepayment penalty	(49,915		)	(30,377		)
Proceeds from credit facility	122,505			698,163
Repayments on credit facility	(434,351		)	(662,879		)
Payment of deferred financing costs	(3,120		)	—
Acquisition of noncontrolling interests	(18,513		)	—
Capital contributions	4,999			4,527
Distributions to partners/noncontrolling interests	(131,943		)	(125,885		)
Net cash used in financing activities	(163,441		)	(116,451		)
Net (decrease) increase in cash, cash equivalents and restricted cash	(58,968		)	15,169
Increase (decrease) in cash, cash equivalents and restricted cash related to foreign currency translation	1,577			(1,778		)
Cash, cash equivalents and restricted cash at beginning of period	95,822			25,685
Cash, cash equivalents and restricted cash at end of period	$	38,431		$	39,076

See accompanying notes.

16

Liberty Property Trust and Liberty Property Limited Partnership

Notes to Consolidated Financial Statements (Unaudited)

June 30, 2019

Note 1: Organization and Basis of Presentation

Organization

Liberty Property Trust (the “Trust”) is a self-administered and self-managed Maryland real estate investment trust (a “REIT”). Substantially all of the Trust’s assets are owned directly or indirectly, and substantially all of the Trust’s operations are conducted directly or indirectly, by its subsidiary, Liberty Property Limited Partnership, a Pennsylvania limited partnership (the “Operating Partnership” and, together with the Trust and their consolidated subsidiaries, the “Company”). The Trust is the sole general partner and also a limited partner of the Operating Partnership, owning 97.7% of the common equity of the Operating Partnership at June 30, 2019. The Company owns and operates industrial properties in the United States nationally, as well as in the United Kingdom. The Company intends to divest its remaining office properties (other than its headquarters) over the next few years and focus its efforts and capital solely on its industrial platform. Unless otherwise indicated, the notes to the Consolidated Financial Statements apply to both the Trust and the Operating Partnership. The terms the “Company,” “we,” “our” and “us” mean the Trust and Operating Partnership collectively.

The Operating Partnership is a variable interest entity (“VIE”) of the Trust as the limited partners do not have substantive kick-out or participating rights. The Trust is the primary beneficiary of the Operating Partnership as it has the power to direct the activities of the Operating Partnership and the rights to absorb 97.7% of the net income of the Operating Partnership. The Trust has no significant assets or liabilities other than its investment in the Operating Partnership. As the Operating Partnership is already consolidated in the balance sheets of the Trust, the identification of this entity as a VIE has no impact on the consolidated financial statements of the Trust. In addition, the Company holds a 20% interest in Liberty/Comcast 1701 JFK Boulevard, LP which was determined to be a VIE. The Company determined that it is not the primary beneficiary as the Company and its third party partner share control of the joint venture. The Company's maximum exposure to loss is equal to its equity investment in the joint venture which was $74.8 million and $75.1 million as of June 30, 2019 and December 31, 2018, respectively.

Basis of Presentation

The accompanying unaudited consolidated financial statements of the Company have been prepared in accordance with United States generally accepted accounting principles (“U.S. GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements and should be read in conjunction with the consolidated financial statements and notes thereto included in the Annual Report on Form 10-K of the Company for the year ended December 31, 2018. In the opinion of management, all adjustments (consisting solely of normal recurring adjustments) necessary for a fair presentation of the financial statements for these interim periods have been included. The results of interim periods are not necessarily indicative of the results to be obtained for a full fiscal year.

Revenue Recognition

In May 2014, the Financial Accounting Standards Board (“FASB”) issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”), which supersedes nearly all existing revenue recognition guidance (except revenue in the scope of other accounting standards, including standards related to leasing). Subsequently, the FASB issued supplementary standards providing additional guidance and targeted improvements to ASU 2014-09 (collectively, the “Revenue Standards”). The Revenue Standards provide a unified model to determine how revenue is recognized. In accordance with the Revenue Standards, the Company performs the following steps: (i) identify the contract with the customer, (ii) identify the performance obligations within the contract, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations and (v) recognize revenue when (or as) a performance obligation is satisfied.

Upon adoption of the Revenue Standards, the Company evaluated each of its revenue streams: lease agreement revenue, development service fee revenue, deferred land sale revenue and gain or loss on sale of nonfinancial assets. The Company concluded that there are no revenue streams from its lease agreements that are covered by the Revenue Standards with the possible exception of non-lease components as further discussed below.

The Revenue Standards did not have an impact on the amount and timing of recognizing the Company's development service fee income. The Company recognizes development service fee income on a variable basis as a percentage of costs incurred on third party development contracts. Property development services, which are a single performance obligation, continue to be satisfied and recognized over time. The Company measures its progress toward completing the performance obligations under each arrangement. The measurement of the transfer of value to the customer for these services utilizes the input method (actual costs

17

incurred against anticipated project costs) since this method best depicts the actual transfer of value promised to the customer. Estimated expected losses on such contracts are accrued in the period in which they are determinable. The total amount of consideration to be received from these projects is assessed on a quarterly basis. Based on existing contracts, substantial completion is anticipated during 2019.

The Company recognizes revenues from improving land sites and selling the underlying land on behalf of its development partner to home builders in the United Kingdom. These agreements typically contain a pre-emption clause and a seller's call option. The Company recognizes revenue as the pre-emption period or seller's call option lapses utilizing the output method. There was $2.2 million and $5.9 million in revenue recognized for such contracts during the three and six months ended June 30, 2019, respectively.

The Revenue Standards did not have an impact on the gain or loss on sale of nonfinancial assets. The Revenue Standards require the Company to derecognize nonfinancial assets once it transfers control of a distinct nonfinancial asset or distinct in-substance nonfinancial asset. Additionally, when the Company transfers its controlling interest in a nonfinancial asset, but retains a noncontrolling ownership interest, the Company is required to measure any noncontrolling interest it receives or retains at fair value. The guidance requires companies to recognize a full gain or loss on the transaction. See Notes 5 and 7 for further discussion of sales of nonfinancial assets during the six months ended June 30, 2019.

Estimated gross revenue related to the remaining performance obligations under existing contracts (before allocation of related costs and expenses) as of June 30, 2019 that will be recognized as revenue in future periods was approximately $33.6 million, which is expected to be recognized in 2019 through 2021.

Recently Issued Accounting Standards

Leases

In February 2016, the FASB issued Accounting Standard Update 2016-02, Leases (“ASU 2016-02”). Additional guidance and targeted improvements to ASU 2016-02 were made through the issuances of supplementary ASUs in July 2018, December 2018 and March 2019 (collectively, the "New Lease Standard"). The New Lease Standard sets out the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e., lessees and lessors). It requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase of the leased asset by the lessee. This classification will determine whether the lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease. The New Lease Standard requires lessors to account for leases using an approach that is substantially equivalent to prior guidance for sales type leases, direct financing leases and operating leases.

The New Lease Standards limit capitalization of certain initial direct costs which were capitalizable under previous lease standards. Such costs, which were expensed during the three and six months ended June 30, 2019, were $0.3 million and $0.6 million, respectively.

The Company adopted the New Lease Standard on January 1, 2019 and applied it using a modified retrospective approach whereby the cumulative effect of the adoption was recognized on the adoption date and prior periods were not restated. There was no net cumulative effect adjustment to retained earnings as of January 1, 2019 as a result of this adoption.

The following practical expedients available for implementation were elected:

a. whether an expired or existing contract meets the definition of a lease

b. the lease classification at the adoption date for existing or expired leases

c. whether costs previously capitalized as initial direct costs would continue to be amortized

Additionally, the Company has elected the practical expedient not to recognize right of use assets and lease liabilities with a term of one year or less.

The Company's leases met the criteria in the New Lease Standard to not separate non-lease components from the related lease component; therefore, the accounting for these leases remained largely unchanged from the previous standard. The Company has elected to exclude sales and other similar taxes from the measurement of lease revenue and expense and the Company has excluded those costs paid directly by lessees to third parties.

Lessee Disclosure

As of June 30, 2019, the Company had a total of five properties subject to operating ground leases in Florida, New Jersey, Kentucky and the United Kingdom with a weighted average remaining term of 47 years. These leases have remaining terms of 11 to 110 years, expiration dates of June 2030 to June 2129, and renewal options of 25 to 48 years. The Company has included in the lease terms renewal options up to the useful life of the asset constructed on the land. Payments for certain properties are subject to increases at five year intervals based upon the agreed or appraised fair market value of the leased premises on the adjustment date

18

or the Consumer Price Index percentage increase since the base rent date. These future changes in payments are considered variable payments and do not impact the assessment of the asset or liability unless there is a significant event that triggers reassessment, such as an amendment with a change in the terms of the lease. The Company used discount rates in a range of 4.1% to 5.0% for a weighted average discount rate of 4.6%, which was derived from the Company's assessment of credit quality of the Company adjusted to reflect secured borrowing, estimated yield curves and long-term spread adjustments over appropriate tenures. The Company also leases office space from unrelated third-parties. The Company recognized lease expense of $482,000 and $950,000 during the three and six months ended June 30, 2019, respectively, of which $453,000 and $886,000, respectively, was paid in cash. The following schedule indicates the approximate future minimum lease payments for the ground and office leases as of June 30, 2019:

Year	Amount
	(in thousands)
2019 (remainder of year)	$	735
2020	1,373
2021	1,235
2022	1,136
2023	1,036
Thereafter	40,770
Total minimum payments	$	46,285
Imputed interest	(27,311		)
Amortization	(357		)
Lease liabilities	$	18,617
Deferred rent	(686		)
Right of use asset	$	17,931

As noted above, the Company adopted the New Lease Standard effective January 1, 2019. Since the Company has applied the provisions on a modified retrospective basis, the following represents approximate future minimum lease payments by year as of December 31, 2018, as applicable under ASC 840, Leases, prior to the adoption of the New Lease Standard.

Year	Amount
	(in thousands)
2019	$	1,512
2020	1,356
2021	1,205
2022	1,082
2023	981
Thereafter	40,799
	$	46,935

The Company recorded ground lease expense of $1.5 million for the year ended December 31, 2018.

Lessor Disclosures

The Company leases its operating properties to customers under agreements that are classified as operating leases. It manages residual risk through investing in properties that it believes will appreciate in value over time.

Substantially all of the Company's operating leases contain provisions for specified annual increases over the rents of the prior year. Rental income from operating leases is generally recognized on a straight-line basis over the lease term when the Company has determined that the collectibility of substantially all the lease payments is probable. If the Company determines that it is not probable that substantially all of the lease payments will be collected, the Company accounts for the revenue under the lease on a cash basis. Changes in the assessment of probability are accounted for on a cumulative basis as if the lease had always been accounted for based on the current determination of the likelihood of collection potentially resulting in increased volatility of rental revenue. Some of the Company's leases have options to extend, terminate or purchase the facilities, which are considered when determining the lease term. Tenant rights to purchase an underlying asset are typically at prevailing market rates at the time

19

of purchase. The Company does not include in measurement of lease receivables certain variable payments, including changes in an index, until the specific events that trigger the variable payments have occurred.

Generally operating leases require the tenants to reimburse the Company for property tax and other expenditures that are not considered components of the lease and therefore no consideration is allocated to them as they do not result in the transfer of a good or service to the tenants. The Company has determined that all of its leases qualify for the practical expedient to not separate the lease and non-lease components because (i) the lease components are operating leases and (ii) the timing and pattern of recognition of the non-lease components are the same as the lease components. The Company applies the New Lease Standard to the combined component. Income derived from the Company's leases is recorded in rental revenue in the Company's consolidated statements of comprehensive income. Certain tenants are obligated to pay directly their obligations under their leases for real estate taxes, insurance and certain other expenses. These obligations, which have been assumed by the tenants under the terms of their respective leases, are not reflected in the Company's consolidated financial statements. To the extent any tenant responsible for these obligations under the respective lease defaults on its lease or if it is deemed probable that the tenant will fail to pay for such costs, the Company would record a liability for such obligation.

The following details the rental income and variable lease income for the three and six months ended June 30, 2019 (in thousands):

	Three Months Ended		Six Months Ended
	June 30, 2019		June 30, 2019
Rental income - operating leases - continuing operations	$	123,544	$	244,617
Rental income - operating leases - discontinued operations	8,581		19,250
Variable lease income - operating leases - continuing operations	36,815		72,115
Variable lease income - operating leases - discontinued operations	2,737		5,845

The following amounts reflect the estimated contractual rents due to the Company for the remainder of terms of the Company's operating leases as of June 30, 2019:

	(in thousands)
Remainder of 2019	$	257,238
2020	494,928
2021	439,299
2022	369,584
2023	300,516
2024	242,833
Thereafter	863,024
Total	$	2,967,422

Other

In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities ("ASU 2017-12"). ASU 2017-12 is designed to better align a company’s financial reporting for hedging activities with the economic objectives of those activities. The Company adopted ASU 2017-12 on January 1, 2019 and it did not have a material impact on the Company's consolidated financial statements.

In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software: Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract ("ASU 2018-15"). ASU 2018-15 amends the definition of a hosting arrangement and requires a customer in a hosting arrangement that is a service contract to capitalize certain implementation costs as if the arrangement was an internal-use software project. ASU 2018-15 is effective for the Company beginning January 1, 2020. The Company does not anticipate the impact of ASU 2018-15 will have a material impact on the consolidated financial statements.

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Note 2: Income per Common Share of the Trust

The following table sets forth the computation of basic and diluted income per common share of the Trust (in thousands except per share amounts):

	Three Months Ended					Three Months Ended
	June 30, 2019					June 30, 2018
	Income (Numerator)		Weighted Average Shares (Denominator)	Per Share		Income (Numerator)		Weighted Average Shares (Denominator)	Per Share
Income from continuing operations net of noncontrolling interest - basic	$	52,764	147,805	$	0.36	$	7,308	147,274	$	0.05
Dilutive shares for long-term compensation plans	—		863			—		1,059
Income from continuing operations net of noncontrolling interest - diluted	$	52,764	148,668	$	0.35	$	7,308	148,333	$	0.05
Discontinued operations net of noncontrolling interests - basic	$	47,005	147,805	$	0.32	$	12,306	147,274	$	0.08
Dilutive shares for long-term compensation plans	—		863			—		1,059
Discontinued operations net of noncontrolling interests - diluted	$	47,005	148,668	$	0.32	$	12,306	148,333	$	0.08
Net income available to common shareholders - basic	$	99,769	147,805	$	0.68	$	19,614	147,274	$	0.13
Dilutive shares for long-term compensation plans	—		863			—		1,059
Net income available to common shareholders - diluted	$	99,769	148,668	$	0.67	$	19,614	148,333	$	0.13
	Six Months Ended					Six Months Ended
	June 30, 2019					June 30, 2018
	Income (Numerator)		Weighted Average Shares (Denominator)	Per Share		Income (Numerator)		Weighted Average Shares (Denominator)	Per Share
Income from continuing operations net of noncontrolling interest - basic	$	92,000	147,706	$	0.62	$	47,447	147,184	$	0.33
Dilutive shares for long-term compensation plans	—		900			—		920
Income from continuing operations net of noncontrolling interest - diluted	$	92,000	148,606	$	0.62	$	47,447	148,104	$	0.32
Discontinued operations net of noncontrolling interests - basic	$	62,100	147,706	$	0.42	$	112,348	147,184	$	0.76
Dilutive shares for long-term compensation plans	—		900			—		920
Discontinued operations net of noncontrolling interests - diluted	$	62,100	148,606	$	0.42	$	112,348	148,104	$	0.76
Net income available to common shareholders - basic	$	154,100	147,706	$	1.04	$	159,795	147,184	$	1.09
Dilutive shares for long-term compensation plans	—		900			—		920
Net income available to common shareholders - diluted	$	154,100	148,606	$	1.04	$	159,795	148,104	$	1.08

Dilutive shares for long-term compensation plans represent the unvested common shares outstanding during the periods as well as the dilutive effect of outstanding options. There were no anti-dilutive options excluded from the computation of diluted income per common share for the three and six months ended June 30, 2019 or 2018.

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During the three and six months ended June 30, 2019, 15,000 and 123,000 common shares, respectively, were issued upon the exercise of options. During the year ended December 31, 2018, 151,000 common shares were issued upon the exercise of options.

Share Repurchase

The Company’s Board of Trustees has authorized a share repurchase plan under which the Company may purchase up to $250 million of the Company’s outstanding common shares through September 28, 2019. Purchases made pursuant to the program may be made in either the open market or in privately negotiated transactions from time to time as permitted by securities laws and other legal requirements. There were no purchases under the plan during the three and six months ended June 30, 2019 or for the year ended December 31, 2018.

Note 3: Income per Common Unit of the Operating Partnership

The following table sets forth the computation of basic and diluted income per common unit of the Operating Partnership (in thousands, except per unit amounts):

	Three Months Ended						Three Months Ended
	June 30, 2019						June 30, 2018
	Income (Numerator)			Weighted Average Units (Denominator)	Per Unit		Income (Numerator)			Weighted Average Units (Denominator)	Per Unit
Income from continuing operations - net of noncontrolling interest - consolidated joint ventures	$	54,093					$	7,597
Less: Preferred unit distributions	(84		)				(118		)
Income from continuing operations available to common unitholders - basic	$	54,009		151,319	$	0.36	$	7,479		150,794	$	0.05
Dilutive units for long-term compensation plans	—			863			—			1,059
Income from continuing operations available to common unitholders - diluted	$	54,009		152,182	$	0.35	$	7,479		151,853	$	0.05
Income from discontinued operations net of noncontrolling interest consolidated joint venture - basic	$	48,119		151,319	$	0.32	$	12,602		150,794	$	0.08
Dilutive units for long-term compensation plans	—			863			—			1,059
Income from discontinued operations net of noncontrolling interest consolidated joint venture - basic	$	48,119		152,182	$	0.32	$	12,602		151,853	$	0.08
Income available to common unitholders - basic	$	102,128		151,319	$	0.68	$	20,081		150,794	$	0.13
Dilutive units for long-term compensation plans	—			863			—			1,059
Income available to common unitholders - diluted	$	102,128		152,182	$	0.67	$	20,081		151,853	$	0.13

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	Six Months Ended						Six Months Ended
	June 30, 2019						June 30, 2018
	Income (Numerator)			Weighted Average Units (Denominator)	Per Unit		Income (Numerator)			Weighted Average Units (Denominator)	Per Unit
Net income - net of noncontrolling interest - consolidated joint ventures	$	94,338					$	48,804
Less: Preferred unit distributions	(168		)				(236		)
Income from continuing operations available to common unitholders - basic	94,170			151,223	$	0.62	48,568			150,704	$	0.33
Dilutive units for long-term compensation plans	—			900			—			920
Income from continuing operations available to common unitholders - diluted	$	94,170		152,123	$	0.62	$	48,568		151,624	$	0.32
Income from discontinued operations net of noncontrolling interest consolidated joint venture - basic	$	63,579		151,223	$	0.42	$	115,033		150,704	$	0.76
Dilutive units for long-term compensation plans	—			900			—			920
Income from discontinued operations net of noncontrolling interest consolidated joint venture - basic	$	63,579		152,123	$	0.42	$	115,033		151,624	$	0.76
Net income available to common unitholders - basic	$	157,749		151,223	$	1.04	$	163,601		150,704	$	1.09
Dilutive units for long-term compensation plans	—			900			—			920
Net income available to common unitholders - diluted	$	157,749		152,123	$	1.04	$	163,601		151,624	$	1.08

Dilutive units for long-term compensation plans represent the unvested common units outstanding during the periods as well as the dilutive effect of outstanding options. There were no anti-dilutive options excluded from the computation of diluted income per common unit for the three and six months ended June 30, 2019 or 2018.

During the three and six months ended June 30, 2019, 15,000 and 123,000 common units, respectively, were issued upon exercise of options. During the year ended December 31, 2018, 151,000 common units were issued upon the exercise of options.

Unit Repurchase

The Company’s Board of Trustees has authorized a share repurchase plan under which the Company may purchase up to $250 million of the Company’s outstanding common units through September 28, 2019. Purchases made pursuant to the program may be made in either the open market or in privately negotiated transactions from time to time as permitted by securities laws and other legal requirements. There were no purchases under the plan during the three and six months ended June 30, 2019 or for the year ended December 31, 2018.

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Note 4: Accumulated Other Comprehensive Loss

The following table sets forth the components of Accumulated Other Comprehensive Loss (in thousands):

	As of and for the six months ended June 30,
	2019			2018
Foreign Currency Translation:
Beginning balance	$	(52,862	)	$	(38,701	)
Translation adjustment	(518		)	(6,206		)
Ending balance	(53,380		)	(44,907		)
Derivative Instruments:
Beginning balance	(3,550		)	150
Unrealized gain	(1,973		)	425
Reclassification adjustment (1)	3			62
Ending balance	(5,520		)	637
Total accumulated other comprehensive loss	(58,900		)	(44,270		)
Less: portion included in noncontrolling interest – operating partnership	1,226			887
Total accumulated other comprehensive loss included in shareholders' equity/owners' equity	$	(57,674	)	$	(43,383	)

(1) Amounts reclassified out of Accumulated Other Comprehensive Loss/General & Limited Partner's Equity into contractual interest expense.

Note 5: Real Estate

Information on the Operating Properties and land parcels the Company acquired during the three months and six months ended June 30, 2019 is as follows:

	Three Months Ended June 30, 2019						Six Months Ended June 30, 2019
	Number of Buildings	Acres of Developable Land		Leaseable Square Feet	Purchase Price (in thousands)		Number of Buildings	Acres of Developable Land	Leaseable Square Feet	Purchase Price (in thousands)
Dallas	—	—	—	—	$	—	2	—	509,733	$	44,400
Southern California	—	—		—	—		1	—	289,683	31,285
United Kingdom	—	—		—	—		—	25.0	—	2,658
Other:
Atlanta	—	—		—	—		—	154.7	—	5,000
New Jersey	1	—		218,000	26,500		3	—	488,254	78,275
	1	—		218,000	$	26,500	6	179.7	1,287,670	$	161,618

In the three months ended June 30, 2019, the Company purchased the noncontrolling interest of two consolidated joint ventures, comprising four buildings in the Company's Philadelphia reportable segment, for $17.8 million. In the six months ended June 30, 2019, the Company purchased the noncontrolling interest of three consolidated joint ventures in the following reportable segments: four buildings in Philadelphia, one building in New Jersey, one building in Dallas and one building in Southern California as well as 21.7 acres of land in Arizona, for $18.5 million.

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Information on the Operating Properties and land parcels the Company sold during the three and six months ended June 30, 2019 is as follows:

	Three Months Ended June 30, 2019					Six Months Ended June 30, 2019
	Number of Buildings	Acres of Developable Land	Leaseable Square Feet	Gross Proceeds (in thousands)		Number of Buildings	Acres of Developable Land	Leaseable Square Feet	Gross Proceeds (in thousands)
Chicago/Minneapolis	—	11.3	—	$	2,865	—	11.3	—	$	2,865
Florida	—	—	—	—		3	—	150,751	23,400
Houston	—	4.0	—	1,505		—	4.0	—	1,505
Philadelphia	1	—	153,242	99,250		1	—	153,242	99,250
Southeastern PA	3	18.0	74,180	10,200		3	18.0	74,180	10,200
Other:
Arizona	—	8.8	—	11,500		—	8.8	—	11,500
New Jersey	—	—	—	—		—	0.8	—	4,000
DC Metro	—	—	—	—		1	—	146,472	61,750
	4	42.1	227,422	$	125,320	8	42.9	524,645	$	214,470

In connection with the sale of a building in the Philadelphia reportable segment in June 2019 the Company repaid a $35.9 million 4.84% mortgage loan due 2033 encumbering the property and, consequently, recognized a loss of $7.6 million on early extinguishment of debt, which is reported in discontinued operations.

In addition to the operating properties and land parcels sold as described above, the Company recognized a gain on sale of $2.0 million during the three and six months ended June 30, 2019 from the sale of non-depreciable assets in Camden, New Jersey located in the Company's Philadelphia reportable segment.

Note 6: Segment Information

The Company owns and operates industrial properties nationally and owns and operates certain non-core office properties in a focused group of office markets. Additionally, the Company owns certain assets in the United Kingdom. At June 30, 2019, the Company's reportable segments were based on the Company's method of internal reporting and were as follows:

• Carolinas/Richmond;

• Chicago/Minneapolis;

• Cincinnati/Columbus/Indianapolis;

• Dallas

• Florida;

• Houston;

• Lehigh/Central PA;

• Philadelphia;

• Southern California; and

• United Kingdom.

Certain other segments are aggregated into an "Other" category which includes the reportable segments: Arizona; Atlanta; DC Metro; New Jersey; and Southeastern Pennsylvania.

Comparative prior periods have been restated to reflect current segment disclosures.

The Company evaluates the performance of its reportable segments based on net operating income. Net operating income includes operating revenue from external customers, real estate taxes, amortization of lease transaction costs and other operating expenses which relate directly to the management and operation of the assets within each reportable segment.

The Company's accounting policies for the segments are the same as those used in the Company's consolidated financial statements. There are no material inter-segment transactions.

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The operating information by reportable segment is as follows (in thousands):

		Three Months Ended						Six Months Ended
		June 30, 2019			June 30, 2018			June 30, 2019			June 30, 2018
Revenue
	Carolinas/Richmond	$	20,666		$	19,513		$	40,752		$	39,306
	Chicago/Minneapolis	17,404			16,622			34,819			33,139
	Cincinnati/Columbus/Indianapolis	4,689			4,547			9,030			9,369
	Dallas	5,782			4,678			11,299			8,763
	Florida	16,064			15,862			32,347			31,270
	Houston	16,638			16,091			32,729			31,954
	Lehigh/Central PA	39,503			38,525			79,710			76,610
	Philadelphia	10,925			10,717			22,263			23,061
	Southern California	10,600			7,516			20,150			14,311
	United Kingdom	5,959			3,783			11,957			8,056
	Other	23,398			31,629			46,949			65,734
Segment-level revenue		171,628			169,483			342,005			341,573
Reconciliation to total revenue
	Development service fee income	978			19,824			1,842			46,176
	Discontinued operations	(11,318		)	(23,085		)	(25,095		)	(49,702		)
	Other	49			(291		)	(178		)	(389		)
Total revenue		$	161,337		$	165,931		$	318,574		$	337,658
Net operating income
	Carolinas/Richmond	$	14,836		$	13,930		$	29,281		$	27,820
	Chicago/Minneapolis	10,831			9,700			21,144			19,313
	Cincinnati/Columbus/Indianapolis	3,052			3,040			5,819			6,277
	Dallas	3,731			2,888			7,268			5,353
	Florida	10,752			10,528			22,161			21,096
	Houston	9,394			8,756			18,193			18,066
	Lehigh/Central PA	28,278			27,576			56,818			54,604
	Philadelphia	8,694			7,921			17,219			16,826
	Southern California	7,248			5,765			14,680			10,848
	United Kingdom	4,942			2,311			8,237			5,495
	Other	15,176			21,267			29,495			43,559
Net operating income		116,934			113,682			230,315			229,257
Reconciliation to income from continuing operations
	Interest expense (1)	(25,872		)	(23,202		)	(52,077		)	(46,661		)
	Development service fee income	978			19,824			1,842			46,176
	Development service fee expense	(847		)	(79,808		)	(1,680		)	(107,875		)
	Depreciation/amortization expense (1) (2)	(31,778		)	(31,932		)	(65,363		)	(65,340		)
	Impairment charges - real estate assets	—			(26,000		)	(99		)	(26,000		)
	Gain on property dispositions	5,462			48,584			5,957			52,742
	Equity in earnings of unconsolidated joint ventures	2,181			7,428			9,190			14,192
	General and administrative expense (1) (2)	(9,563		)	(8,302		)	(25,304		)	(23,054		)
	Leasing cost	(3,318		)	(2,767		)	(6,526		)	(5,579		)
	Other operating expenses (2)	(3,256		)	(1,577		)	(5,524		)	(4,079		)
	Discontinued operations excluding gain and impairment on property dispositions	580			(12,952		)	(6,034		)	(25,448		)
	Income taxes (1) (2)	(5		)	6			(5		)	18
	Other	2,600			5,194			9,626			11,046
Income from continuing operations		$	54,096		$	8,178		$	94,318		$	49,395

(1) Includes activity in discontinued operations.

(2) Excludes costs that are included in determining net operating income.

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The Company's total assets by reportable segment as of June 30, 2019 and December 31, 2018 is as follows (in thousands):

	June 30, 2019		December 31, 2018
Carolinas/Richmond	$	524,408	$	525,041
Chicago/Minnesota	584,471		591,792
Cincinnati/Columbus/Indianapolis	133,848		131,400
Dallas	305,282		261,538
Florida	546,815		547,232
Houston	605,443		568,756
Lehigh/Central PA	1,205,634		1,210,220
Philadelphia	624,370		624,373
Southern California	713,262		660,688
United Kingdom	405,707		463,162
Other	1,165,094		1,153,518
Segment-level total assets	6,814,334		6,737,720
Corporate Other	67,925		196,674
Total assets	$	6,882,259	$	6,934,394

Note 7: Impairment or Disposal of Long-Lived Assets

In 2017, the Company initiated a strategic shift whereby it adopted a plan to divest of its remaining suburban office properties. In the third quarter of 2018, the Company updated its strategy whereby it adopted a plan to divest of all of its remaining office properties. The Company determined that the strategic shift would have a major effect on its operations and financial results. As such, properties sold or those that meet the criteria to be classified as held for sale within the corporate strategy were classified within discontinued operations. Consistent with the held for sale criteria these properties are expected to be sold within one year. As the result of the classification within discontinued operations, the in-service assets and liabilities of this portfolio are required to be presented as held for sale for all prior periods presented in our Consolidated Balance Sheets. Operating results pertaining to these properties were reclassified to discontinued operations for all prior periods presented in our Consolidated Statements of Comprehensive Income.

The following table illustrates the number of sold or held for sale properties included in, or excluded from, discontinued operations:

	Held for sale as of June 30, 2019	Sold during the six months ended June 30, 2019	Sold during the year ended December 31, 2018	Total
Properties included in discontinued operations	14	8	37	59
Properties included in continuing operations	3	—	2	5
Properties sold or classified as held for sale	17	8	39	64

In addition, there were four properties comprising 86.0 acres included as held for sale as of June 30, 2019.

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The properties held for sale with operating results in discontinued operations as of June 30, 2019 were located in the following reportable segments: two properties in Southeastern PA, one property in Chicago/Minneapolis, eight properties in Philadelphia one property in DC Metro and two in the United Kingdom.

A summary of the results of operations for the properties classified as discontinued operations is as follows (in thousands):

	Three Months Ended						Six Months Ended
	June 30, 2019			June 30, 2018			June 30, 2019			June 30, 2018
Revenues	$	11,318		$	23,085		$	25,095		$	49,702
Operating expenses	(3,452		)	(5,253		)	(7,787		)	(11,952		)
Depreciation and amortization	(62		)	(3,073		)	(2,129		)	(8,472		)
Impairment charges - real estate assets	(4,018		)	—			(14,292		)	—
Interest and other income (expense)	(39		)	(29		)	(60		)	(58		)
Income taxes	(261		)	(30		)	(293		)	(55		)
Loss on debt extinguishment	(7,618		)	—			(7,618		)	—
Interest expense	(466		)	(1,748		)	(1,174		)	(3,717		)
Gain (loss) on property dispositions	52,837			(240		)	72,024			89,772
Income from discontinued operations	48,239			12,712			63,766			115,220
Noncontrolling interest - operating partnership	(1,114		)	(296		)	(1,479		)	(2,685		)
Noncontrolling interest - consolidated joint venture	(120		)	(110		)	(187		)	(187		)
Income from discontinued operations available to common shareholders	$	47,005		$	12,306		$	62,100		$	112,348

Interest expense has been allocated to discontinued operations. The allocation of interest expense to discontinued operations was based on the ratio of net assets sold and held for sale included in discontinued operations to the sum of total net assets plus consolidated debt.

Capital expenditures on a cash basis related to properties within discontinued operations were $2.1 million and $3.5 million, respectively, for the three and six months ended June 30, 2019, and $11.2 million and $27.4 million, respectively, for the three and six months ended June 30, 2018.

Assets Held for Sale

As of June 30, 2019, 17 properties were classified as held for sale, of which 14 properties met the criteria to be classified within discontinued operations and three properties were classified within continuing operations. In addition, there were four properties comprising 86.0 acres included as held for sale as of June 30, 2019.

The following table illustrates aggregate balance sheet information for all held for sale properties (in thousands):

	June 30, 2019									December 31, 2018
	Included in Continuing Operations			Included in Discontinued Operations			Total			Included in Continuing Operations			Included in Discontinued Operations			Total
Land and land improvements	$	3,056		$	91,677		$	94,733		$	1,301		$	113,080		$	114,381
Buildings and improvements	25,119			253,295			278,414			5,638			384,737			390,375
Development in progress	—			10,269			10,269			—			9,597			9,597
Land held for development	21,120			—			21,120			26,253			—			26,253
Accumulated depreciation	(6,559		)	(36,946		)	(43,505		)	(1,546		)	(70,242		)	(71,788		)
Deferred financing and leasing costs, net	1,099			10,848			11,947			58			13,697			13,755
Other assets	1,153			12,595			13,748			164			19,470			19,634
Total assets held for sale	$	44,988		$	341,738		$	386,726		$	31,868		$	470,339		$	502,207
Total liabilities held for sale	$	2,941		$	16,092		$	19,033		$	141		$	20,990		$	21,131

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Impairment Charges - Real Estate Assets

The Company recorded $4.0 million and $14.4 million of impairment charges during the three and six months ended June 30, 2019, respectively. These impairment charges were primarily related to an office building held for sale in the Company's DC Metro segment and is primarily included in discontinued operations in the Company's Consolidated Statements of Comprehensive Income.

The Company determined these impairments based on third party offer prices which are Level 2 according to the fair value hierarchy established in ASC 820.

The Company recorded a $26.0 million impairment charge during the three and six months ended June 30, 2018. This charge related to the Camden Waterfront project located in Camden, New Jersey and reported in the Company's Philadelphia reportable segment. The Company determined this impairment based on quoted offer prices on comparable properties, which is a Level 3 fair value calculation.

The Company has applied reasonable estimates and judgments in evaluating each of its properties and land held for development and has determined that there are no additional valuation adjustments necessary at June 30, 2019. Should external or internal circumstances change requiring the need to shorten the holding periods or adjust the estimated future cash flows of the Company’s assets, the Company could be required to record additional impairment charges in the future.

Note 8: Noncontrolling Interests of the Trust

Noncontrolling interests in the accompanying financial statements represent the interests of the common and preferred units in the Operating Partnership not held by the Trust. In addition, noncontrolling interests include third-party ownership interests in consolidated joint venture investments.

Common units

The common units of the Operating Partnership not held by the Trust outstanding as of June 30, 2019 have the same economic characteristics as common shares of the Trust. The 3.5 million outstanding common units of the Operating Partnership not held by the Trust share proportionately in the net income or loss and in any distributions of the Operating Partnership. The common units of the Operating Partnership not held by the Trust are redeemable at any time at the option of the holder. The Trust, as the sole general partner of the Operating Partnership, may at its option elect to settle the redemption in cash or through the exchange on a one-for-one basis with unregistered common shares of the Trust. The market value of the 3.5 million outstanding common units based on the closing price of the common shares of the Trust at June 30, 2019 was $175.8 million.

Note 9: Limited Partners' Equity and Noncontrolling Interest of the Operating Partnership

Limited partners' equity in the accompanying financial statements represents the interests of the common and preferred units in the Operating Partnership not held by the Trust. The Operating Partnership's noncontrolling interest includes third-party ownership interests in consolidated joint venture investments.

Common units

The common units outstanding have the same economic characteristics as common shares of the Trust. The 3.5 million outstanding common units as of June 30, 2019 not held by the Trust are the limited partners' equity - common units held by persons and entities other than the Trust. The common units of the Operating Partnership not held by the Trust are redeemable at any time at the option of the holder. The Trust, as the sole general partner of the Operating Partnership, may at its option elect to settle the redemption in cash or through the exchange on a one-for-one basis with unregistered common shares of the Trust. The market value of the 3.5 million outstanding common units based on the closing price of the common shares of the Trust at June 30, 2019 was $175.8 million.

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Note 10: Noncontrolling Interest - Operating Partnership/Limited Partners' Equity - Preferred Units

As of June 30, 2019, the Company had outstanding the following cumulative preferred units of the Operating Partnership:

ISSUE	AMOUNT		UNITS	LIQUIDATION PREFERENCE		DIVIDEND RATE
	(in 000’s)
Series I-2	$	5,337	213	$	25	6.25	%

The preferred units are putable at the holder's option at any time and are callable at the Operating Partnership's option after a stated period of time for cash. During the six months ended June 30, 2019, 88,000 preferred units were redeemed for $2.2 million.

Note 11: Indebtedness

In January 2019, the Company issued $350 million of 4.375% senior unsecured notes due 2029. The net proceeds from this issuance were used to repay borrowings under the Company's unsecured credit facilities and for general corporate purposes.

Note 12: Fair Value of Financial Instruments

ASC 820, Fair Value Measurements and Disclosures, provides guidance on the fair value measurement of a financial asset or liability. Inputs used to develop fair value are classified in one of three categories: Level 1 inputs (quoted prices (unadjusted) in active markets for identical assets or liabilities), Level 2 inputs (inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly) and Level 3 inputs (unobservable inputs for the asset or liability).

The following disclosure of estimated fair value was determined by management using available market information and appropriate valuation methodologies. However, considerable judgment is necessary to interpret market data and develop estimated fair value. Accordingly, the following estimates are not necessarily indicative of the amounts the Company could have realized on disposition of the financial instruments at December 31, 2018 and June 30, 2019. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts.

The carrying value of cash and cash equivalents, restricted cash, accounts receivable, accounts payable, accrued interest, dividend and distributions payable and other liabilities are reasonable estimates of fair value because of the short-term nature of these instruments. The carrying value of the outstanding amounts under the Company's credit facilities is a reasonable estimate of fair value because interest rates float at a rate based on LIBOR.

The Company determines the fair value of its interest rate swaps by using the standard methodology of netting discounted future fixed cash payments with the discounted expected variable cash receipts. These variable cash receipts of interest rate swaps are based on expectations of future LIBOR interest rates (forward curves) estimated by observing market LIBOR interest rate curves. This is a Level 2 fair value calculation. Also, credit valuation adjustments are factored into the fair value calculations to account for potential nonperformance risk. These credit valuation adjustments were concluded to be not significant inputs for the fair value calculations for the periods presented. See Note 14 - Derivative Instruments.

The Company used a discounted cash flow model to determine the estimated fair value of its debt as of December 31, 2018 and June 30, 2019. This is a Level 3 fair value calculation. The inputs used in preparing the discounted cash flow model include actual maturity dates and scheduled cash flows as well as estimates for market value discount rates. The Company updates the discounted cash flow model on a quarterly basis to reflect any changes in the Company's debt holdings and changes to discount rate assumptions.

The following summarizes the fair value of the Company's mortgage loans and unsecured notes as of December 31, 2018 and June 30, 2019 (in thousands):

	Mortgage Loans				Unsecured Notes
	Carrying Value		Fair Value		Carrying Value		Fair Value
As of December 31, 2018	$	395,202	$	397,167	$	2,285,698	$	2,295,699
As of June 30, 2019	$	351,493	$	402,794	$	2,632,881	$	2,795,031

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Note 13: Unconsolidated Joint Ventures

Liberty Property 18th & Arch LP and Liberty Property 18th & Arch Hotel, LP

On June 30, 2014, the Company entered into two joint ventures for the purpose of developing and owning the Comcast Technology Center (the “Project”) located in Philadelphia, Pennsylvania as part of a mixed-use development. The 60-story building includes 1.3 million square feet of leasable office space (the “Office”), which is substantially complete and fully occupied by Comcast Corporation, and a 219-room Four Seasons Hotel (the “Hotel”), which is nearing substantial completion and is scheduled to open to the public in August 2019. Costs for the development of the Project, exclusive of tenant-funded interior improvements, are anticipated to be approximately $968 million. As of June 30, 2019, the Company's investment in the project is $193.5 million and is reflected in investments in and advances to unconsolidated joint ventures in the Company's consolidated balance sheet. These joint ventures are part of the Company's Philadelphia reportable segment.

The two joint ventures engaged the Company as the developer of the Project pursuant to a Development Agreement by which the Company agreed, in consideration for a development fee, to be responsible for all aspects of the development of the Project and to guarantee the timely lien-free completion of construction of the Project as well as the payment, subject to certain exceptions, of any cost overruns incurred in the development of the Project. To mitigate its risk, the Company entered into guaranteed maximum price contracts (the "GMP Contracts") with a third party contractor (the "General Contractor") to construct the Project. The Company has been notified by the General Contractor that the General Contractor has incurred cost overruns comprised of amounts owed to third-party subcontractors and internal general condition costs of the General Contractor in connection with completing the Project in excess of the guaranteed maximum price payable to the General Contractor under the GMP Contracts, which guaranteed maximum price has been previously adjusted pursuant to accepted change orders. Notwithstanding the GMP Contracts, the General Contractor has generally refused to fund the cost overruns owed to third-party subcontractors, and the Company has funded, and may continue to fund, subcontractor cost overruns in compliance with its obligations under its development cost guarantee to the joint ventures. Accordingly, in periods prior to 2019, the Company accrued $69.3 million relating primarily to cost overruns that it estimated were probable of being funded to third-party subcontractors under its development cost guarantees to the joint ventures. As of June 30, 2019 and December 31, 2018, the Company's remaining accrual was $34.8 million and $67.3 million, respectively (including, in each case, estimated retainage of approximately $24 million payable to subcontractors), which accruals are included in other liabilities in the accompanying consolidated balance sheets and are reflective of amounts cumulatively funded by the Company as of those dates. The Company is accounting for the development of the Project on a variable basis as a percentage of costs incurred under the development contract. The Company recognized a loss of $60.0 million and $61.8 million for the three and six months ended June 30, 2018, respectively, in development service fee income, net of development service fee expense and other related expenses. There was no loss or gain recognized related to the Project during the three and six months ended June 30, 2019. The Company intends to pursue all remedies to recover from the General Contractor any amounts expended by the Company or the joint ventures in excess of their contractual obligations.

In addition to the costs to comply with the Company's obligations under its development cost guarantee, other claims related to the development of the Project have been asserted by the General Contractor and certain subcontractors. Should disputes with respect to these asserted claims proceed, the Company expects that it would assert claims against the General Contractor, both with respect to the claims as to which the above-described accrual has been made, as well as with respect to the additional claims described in this paragraph. There can be no assurances that amounts incurred, including as a result of such claims, will not exceed the above estimates. The Company is not able to reasonably estimate the amount of additional costs, if any, that it may incur as a result of such claims, and accordingly any potential exposure of the Company for such claims is not included within the accrual described above. Similarly, the Company is not able to reasonably estimate the amount, if any, that the Company may recover with respect to any claims it may assert against the General Contractor. If the Company were to incur additional expenses in connection with its development cost guarantee or in connection with such claims, such amounts would be accrued when they are determined to be probable of being incurred and are reasonably estimable, and could be material to the Company's results of operations in future periods. If the Company were to subsequently recover any of the cost overruns initially funded by the Company, whether pursuant to any such claims asserted by the Company or otherwise, such recoveries would be recorded when and if realized in future periods.

Liberty Washington, LP

During the three months ended June 30, 2019, the Company concluded that a property owned by this joint venture and held for sale had an indicator of impairment resulting from a decline in the Washington, DC market fundamentals. The joint venture recognized an impairment charge of $16.4 million for the three and six months ended June 30, 2019. The Company's share of this impairment charges was $4.1 million for the same periods. The impairment charge is related to the Company's DC Metro reportable segment and the Company's share is included in equity in earnings of unconsolidated joint ventures in the accompanying consolidated statements of comprehensive income. The Company determined these impairments based on estimated future discounted cash flows. This is a Level 3 fair value calculation.

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Cambridge Medipark Ltd

During the three and six months ended June 30, 2019, Cambridge Medipark, Ltd (a joint venture in which the Company holds a 50% interest) recognized gains on the sale of land leasehold interests. The Company's share of these gains was $244,000 and $1.0 million for the three and six months ended June 30, 2019, respectively, compared to $1.7 million and $3.7 million, respectively, for the same periods in 2018.

Note 14: Derivative Instruments

The Company borrows funds at a combination of fixed and variable rates. Borrowings under the Company's revolving credit facility and certain bank mortgage loans bear interest at variable rates. Other long-term debt typically bears interest at fixed rates. The Company's interest rate risk management objectives are to limit generally the impact of interest rate changes on earnings and cash flows and to lower the Company's overall borrowing costs. To achieve these objectives, from time to time, the Company enters into interest rate hedge contracts such as collars, swaps, caps and treasury lock agreements in order to mitigate our interest rate risk with respect to various debt instruments. The Company generally does not hold or issue these derivative contracts for trading or speculative purposes.

Interest rate swaps involve the receipt of variable-rate amounts from a counterparty in exchange for making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. The changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive loss and noncontrolling interest (for the Trust) and general partner's equity and limited partners’ equity - common units (for the Operating Partnership) and is subsequently reclassified into interest expense in the period that the hedged forecasted transaction affects earnings.

The Company determines the fair value of its interest rate swaps by netting discounted future fixed cash payments with the discounted expected variable cash receipts. These variable cash receipts of interest rate swaps are based on expectations of future LIBOR interest rates (forward curves) estimated by observing market LIBOR interest rate curves. This is a Level 2 fair value calculation. Also, credit valuation adjustments are factored into the fair value calculations to account for potential nonperformance risk. These credit valuation adjustments were concluded to be not significant inputs for the fair value calculations for the periods presented.

The Company holds an interest in two interest rate swap contracts (“Swaps”) that eliminate the impact of changes in interest rates on the payments required under variable rate mortgages. The Swaps had aggregate notional amounts of $65.7 million and $66.8 million at June 30, 2019 and December 31, 2018, respectively, and expire in 2020.

In addition, in late 2018, in anticipation of conducting the offering of senior notes described in Note 11, the Operating Partnership entered into two interest rate lock agreements tied to the U.S. treasury rate for an aggregate notional amount of $200 million. An interest rate lock is a tool used to manage interest-rate risk by effectively securing interest rates on federal government securities as of the agreement date. One agreement had a notional amount of $100 million and expired and was settled in 2018 for $2.4 million. The second agreement had a notional amount of $100 million and expired in 2019. It was settled for $3.3 million prior to consummation of such offering of senior notes. The interest rate lock agreements qualified as cash flow hedges with respect to the senior notes offering and, as such, the settlements of $5.7 million will be amortized into interest expense over the respective term of the notes.

The Company accounts for the changes in the fair value of a derivative in accumulated other comprehensive loss and subsequently reclassifies amounts to earnings over the term that the hedged transaction affects earnings.

The following table presents the location in the financial statements of the gains or losses recognized related to the Company’s cash flow hedges for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended					Six Months Ended
	June 30, 2019			June 30, 2018		June 30, 2019		June 30, 2018
Amount of gain related to the effective portion recognized in other comprehensive (loss) income	$	(147	)	$	148	$	412	$	550
Total Amount of Interest Expense Presented in the Consolidated Statements of Comprehensive Income	25,406			21,454		50,903		42,944

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The following table presents the fair value of the Company’s derivative financial instruments as well as their classification on the accompanying consolidated balance sheets as of June 30, 2019 and December 31, 2018 (amounts in thousands):

	Derivatives
		Fair Value at:
	Balance Sheet Location	June 30, 2019		December 31, 2018
Derivatives designated as hedging instruments:
Interest Rate Swaps	Other Liabilities	$	567	$	677
Interest Rate Treasury Locks	Other Liabilities	—		3,972
Total		$	567	$	4,649

Amounts reported in accumulated other comprehensive income related to derivatives will be reclassified to interest expense as interest payments are made on the Company’s debt. The Company estimates that $0.5 million will be reclassified from accumulated other comprehensive loss as an increase to interest expense over the next 12 months.

The Company has agreements with its derivative counterparties that contain a provision whereby if the Company defaults on any of its indebtedness, including defaults where repayment of the indebtedness has not been accelerated by the lender, then the Company could also be declared in default on its derivative obligations. If the Company were to breach any of the contractual provisions of the derivative contracts, it would be required to settle its obligations under the agreements at their termination value including accrued interest, which totaled approximately $0.6 million as of June 30, 2019.

Note 15: Commitments and Contingencies

Environmental Matters

Substantially all of the Company's properties and land were subject to Phase I Environmental Assessments and when appropriate Phase II Environmental Assessments (collectively, the “Environmental Assessments”) obtained in contemplation of their acquisition by the Company or obtained by predecessor owners prior to the sale of the property or land to the Company. The Environmental Assessments did not reveal, nor is the Company aware of, any non-compliance with environmental laws, environmental liability or other environmental claim that the Company believes would likely have a material adverse effect on the Company.

Legal Matters

From time to time, the Company is a party to a variety of legal proceedings, claims and assessments arising in the normal course of business. As of June 30, 2019 there were no legal proceedings, claims or assessments that the Company expects to have a material adverse effect on the Company. However, see Note 13 for discussion of Comcast Technology Center.

Other

As of June 30, 2019, the Company had letter of credit obligations of $8.3 million.

As of June 30, 2019, the Company had 24 buildings under development. These buildings are expected to contain, when completed, a total of 6.8 million square feet of leasable space and represent an anticipated aggregate investment of $584.3 million. At June 30, 2019, development in progress totaled $416.0 million. In addition, as of June 30, 2019, the Company had invested $18.0 million in deferred leasing costs related to these development buildings.

The Company is currently developing three properties for its unconsolidated joint ventures which represent an anticipated aggregate investment by the joint ventures of $247.8 million.

As of June 30, 2019, the Company was committed to the following:

• $12.0 million in improvements on certain buildings and land parcels;

• $44.5 million in future land acquisitions which it expects to complete during the year ending December 31, 2019;

• up to $16.9 million of tenant improvements not yet completed; and

• infrastructure improvements of approximately $1.0 million.

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The Company maintains cash and cash equivalents at financial institutions. The combined account balances at each institution typically exceed FDIC insurance coverage and, as a result, there is a concentration of credit risk related to amounts on deposit in excess of FDIC insurance coverage. The Company believes the risk is not significant.

Two unconsolidated joint ventures in which the Company holds an interest have engaged the Company as the developer of the Comcast Technology Center (the “Project") pursuant to a Development Agreement by which the Company agrees, in consideration for a development fee, to be responsible for all aspects of the development of the Project and to guarantee the timely lien-free completion of construction of the Project as well as the payment, subject to certain exceptions, of any cost overruns incurred in the development of the Project. See Note 13 for details on the commitments and contingencies associated with the Project.

Note 16: Supplemental Disclosure to Consolidated Statements of Cash Flows

The following are supplemental disclosures to the consolidated statements of cash flows for the six months ended June 30, 2019 and 2018 (amounts in thousands):

	2019			2018
Write-off of fully depreciated/amortized property and deferred costs - properties included in continuing operations	$	1,110		$	14,609
Write-off of fully depreciated/amortized property and deferred costs - properties included in discontinued operations	$	—		$	1,886
Write-off of depreciated property and deferred costs due to sale - properties included in continuing operations	$	—		$	19,564
Write-off of depreciated property and deferred costs due to sale and related debt repayment - properties included in discontinued operations	$	28,221		$	96,936
Changes in accrued development capital expenditures - properties included in continuing operations	$	(651	)	$	10,063
Changes in accrued development capital expenditures - properties included in discontinued operations	$	—		$	(1,424	)
Unrealized (loss) gain on cash flow hedge	$	(1,970	)	$	487
Capitalized equity-based compensation	$	705		$	240

Amounts paid in cash for deferred leasing costs incurred in connection with signed leases with tenants are paid in conjunction with improving (acquiring) property, plant and equipment. Such costs are not contained within net real estate. However, they are integral to the completion of a tenant lease and ultimately are related to the improvement and thus the value of the Company’s property, plant and equipment. They are therefore included in investing activities in the Company’s consolidated statements of cash flows.

The following is a reconciliation of the Company's cash and cash equivalents and restricted cash at the beginning and end of the six months ended June 30, 2019 and 2018 (amounts in thousands):

	2019		2018
Cash and cash equivalents at beginning of period	$	84,923	$	11,882
Restricted cash at beginning of period	10,899		13,803
Cash and cash equivalents and restricted cash at beginning of period	$	95,822	$	25,685
Cash and cash equivalents at end of period	$	21,039	$	24,211
Restricted cash at end of period	17,392		14,865
Cash and cash equivalents and restricted cash at end of period	$	38,431	$	39,076

Restricted cash includes tenant security deposits and escrow funds that the Company maintains pursuant to certain mortgage loans. Restricted cash also includes the undistributed proceeds from the sale of land in Kent County, United Kingdom.

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

Overview

Liberty Property Trust (the “Trust”) is a self-administered and self-managed Maryland real estate investment trust (“REIT”). Substantially all of the Trust’s assets are owned directly or indirectly, and substantially all of the Trust’s operations are conducted directly or indirectly, by its subsidiary, Liberty Property Limited Partnership, a Pennsylvania limited partnership (the “Operating Partnership” and, collectively with the Trust and their consolidated subsidiaries, the “Company”).

The Company owns and operates industrial properties nationally, as well as in the United Kingdom.

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As previously reported, and as further summarized below, the Company undertook several significant transactions in recent years consistent with its strategy to divest its remaining office Properties (other than its headquarters) and focus its efforts and capital solely on its industrial platform, which favors industrial properties and markets with strong demographic and economic fundamentals. In furtherance of this strategy, the Company has substantially divested of its suburban office Properties, and expects to divest its remaining metro-office Properties over the next few years. The Company plans to reinvest the proceeds of these divestments in acquisitions and new development in targeted industrial markets. The Company anticipates that this strategy will yield benefits over time, including a higher rate of rental growth and a lower level of lease transaction costs and other capital costs for industrial properties as opposed to office properties. The Company believes that this strategy has resulted in an improvement in the average quality and geographic location of its properties. The Company also believes that the benefits of the strategy will outweigh the short-term reduction in operating cash flow resulting from the disposition of its office Properties. There can be no assurance, however, that the benefits of the Company’s strategy will be realized.

As of June 30, 2019, the Company owned the following Properties in Operation (square feet in thousands):

	Number of Operating Industrial Properties	Number of Operating Non-Core Properties	Total Number of Properties	Total Square Feet
Wholly Owned Properties in Operation	494	18	512	94,019
JV Properties in Operation (at 100%)	48	18	66	14,854
Properties in Operation	542	36	578	108,873

As of June 30, 2019 the Company owned the following "Properties under Development" and "Properties held for Redevelopment/Value-Added" (square feet upon completion in thousands):

	Number of Properties	Total Square Feet		Acres of Developable Land
Wholly Owned Properties under Development	24	6,839		1,381
JV Properties under Development (at 100%)	3	214	(1)	339
Properties under Development	27	7,053		1,720
Wholly Owned Properties held for Redevelopment/Value-Added	3	533		—
JV Properties held for Redevelopment/Value-Added (at 100%)	1	48		—
Properties held for Redevelopment/Value-Added	4	581		—
(1) Including a 219-room hotel, which is excluded from square footage total.

The Company focuses on creating value for shareholders and increasing profitability and cash flow. With respect to its Properties in Operation, the Company endeavors to maintain high occupancy levels while maximizing rental rates and controlling costs. The Company pursues development opportunities that it believes will create value and yield acceptable returns. The Company also acquires properties that it believes will create long-term value, and disposes of properties that no longer fit within the Company’s strategic objectives or in situations where it can optimize cash proceeds.

The Company’s operating results depend primarily upon income from rental operations and are substantially influenced by rental demand for the Properties in Operation. During the six months ended June 30, 2019, GAAP rents on retained and replacement industrial leases were on average 13.9% higher than rents on expiring leases. During the six months ended June 30, 2019, the Company leased 17.6 million square feet. The following details the Company's occupancy as of June 30, 2019 and December 31, 2018:

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	June 30, 2019		December 31, 2018
Wholly owned operating industrial properties	94.8	%	95.7	%
Wholly owned operating non-core properties	95.9	%	85.0	%
Wholly owned total	94.8	%	95.4	%
Joint venture operating industrial properties	98.2	%	99.5	%
Joint venture operating non-core properties	97.8	%	97.0	%
Joint venture total	98.1	%	98.9	%

During the third quarter of 2018, the Sears Holdings Corporation ("Sears") filed for reorganization under Chapter 11 of the federal bankruptcy laws. On April 30, 2019, Sears rejected a lease for 849,000 square feet in the Company's Lehigh/Central PA reportable segment (see below). At the time the tenant rejected the lease, this tenant represented 0.8% of square feet of the Company's Properties in Operation and 0.8% of Net Rent (see Properties in Operation below for definition of Net Rent).

Based on the Company's current outlook, the Company anticipates that property level operating income for the Same Store (defined below) group of industrial properties will increase for the full year 2019, compared to 2018, driven primarily by new and renewal leases being executed at higher rental rates than those of expiring leases. For the full year 2019, compared to 2018, the Company expects Same Store occupancy levels to decline modestly compared with those in 2018.

The assumptions presented above are forward-looking and are based on the Company’s future view of market and general economic conditions, as well as other risks outlined below under the caption “Forward-Looking Statements.”  There can be no assurance that the Company’s actual results will not differ materially from assumptions set forth above.  The Company assumes no obligation to update these assumptions in the future.

Wholly Owned Capital Activity

Acquisitions

During the three months ended June 30, 2019, the Company acquired one property for a purchase price of $26.5 million. This property, which contains 218,000 square feet of leaseable space, was 100% occupied as of June 30, 2019. During six months ended June 30, 2019, the Company acquired six properties for an aggregate purchase price of $154.0 million. These properties, which collectively contain 1.3 million square feet of leaseable space, were 93.0% occupied as of June 30, 2019.

During the three and six months ended June 30, 2019, the Company acquired two parcels of land collectively containing 179.7 acres for an aggregate purchase price of $7.7 million.

Dispositions

During the three months ended June 30, 2019, the Company realized proceeds of $103.0 million from the sale of four properties totaling 227,000 square feet. During the six months ended June 30, 2019, the Company realized proceeds of $188.2 million from the sale of eight properties totaling 525,000 square feet.

During the three months ended June 30, 2019, the Company realized proceeds of $22.3 million from the sale of 42.1 acres of land. During the six months ended June 30, 2019, the Company realized proceeds of $26.3 million from the sale of 42.9 acres of land.

In addition to the operating properties and land parcels sold as described above, the Company recognized a gain on sale of $2.0 million during the three and six months ended June 30, 2019 from the sale of non-depreciable assets.

Development

During the three months ended June 30, 2019, the Company brought into service two Wholly Owned Properties under Development representing 824,000 square feet and a Total Investment of $79.3 million. During the six months ended June 30, 2019, the Company brought into service eight Wholly Owned Properties under Development representing 1.7 million square feet and a Total Investment of $168.4 million. During the three months ended June 30, 2019, the Company initiated one Wholly Owned Property under Development with a projected Total Investment of $10.7 million. During the six months ended June 30, 2019, the Company initiated three Wholly Owned Properties under Development with a projected Total Investment of $28.5 million.

As of June 30, 2019, the Company had 24 Wholly Owned Properties under Development with a projected Total Investment of $584.3 million. These Wholly Owned Properties under Development were 34.5% pre-leased as of June 30, 2019.

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“Total Investment” for a Property Under Development is defined as the sum of the land costs and the costs of land improvements, building and building improvements, lease transaction costs, and where appropriate, other development costs and carrying costs.

Unconsolidated Joint Venture Capital Activity

The Company periodically enters into unconsolidated joint venture relationships in connection with the execution of its real estate operating strategy.

Acquisitions/Dispositions

None of the unconsolidated joint ventures in which the Company holds an interest sold or acquired any operating properties or land parcels during the three and six months ended June 30, 2019.

Development

As of June 30, 2019, unconsolidated joint ventures in which the Company holds an interest had two JV Properties under Development (exclusive of the 18th & Arch Hotel, which is more specifically discussed below) which are expected to comprise, upon completion, 214,000 square feet and are expected to represent a Total Investment by the joint ventures of $16.2 million. These JV Properties under Development were 34.3% pre-leased as of June 30, 2019. During the three and six months ended June 30, 2019, an unconsolidated joint venture in which the Company holds an interest initiated a JV Property under Development with a projected Total Investment of $6.3 million.

In addition, joint ventures in which the Company holds an interest continued the development of the Comcast Technology Center (the “Project”). The 219-room Four Seasons hotel representing an aggregate Total Investment by the Hotel joint venture of $231.6 million when completed continued to be developed by the Hotel joint venture as of June 30, 2019.

The two joint ventures engaged the Company as the developer of the Project pursuant to a Development Agreement by which the Company agreed, in consideration for a development fee, to be responsible for all aspects of the development of the Project and to guarantee the timely lien-free completion of construction of the Project as well as the payment, subject to certain exceptions, of any cost overruns incurred in the development of the Project. To mitigate its risk, the Company entered into guaranteed maximum price contracts (the "GMP Contracts") with a third party contractor (the "General Contractor") to construct the Project. The Company has been notified by the General Contractor that the General Contractor has incurred cost overruns comprised of amounts owed to third-party subcontractors and internal general condition costs of the General Contractor in connection with completing the Project in excess of the guaranteed maximum price payable to the General Contractor under the GMP Contracts, which guaranteed maximum price has been previously adjusted pursuant to accepted change orders. Notwithstanding the GMP Contracts, the General Contractor has generally refused to fund the cost overruns owed to third-party subcontractors, and the Company has funded, and may continue to fund, subcontractor cost overruns in compliance with its obligations under its development cost guarantee to the joint ventures. Accordingly, in periods prior to 2019, the Company accrued $69.3 million relating primarily to cost overruns that it estimated were probable of being funded to third-party subcontractors under its development cost guarantees to the joint ventures. As of June 30, 2019 and December 31, 2018, the Company's accrual was $34.8 million and $67.3 million, respectively (including, in each case, estimated retainage of approximately $24 million payable to subcontractors), which accruals are included in other liabilities in the accompanying consolidated balance sheets and are reflective of amounts cumulatively funded by the Company as of those dates. The Company is accounting for the development of the Project on a variable basis as a percentage of costs incurred under the development contract. The Company recognized a loss of $60.0 million and $61.8 million for the three and six months ended June 30, 2018, respectively, in development service fee income, net of development service fee expense and other related expenses. There was no loss or gain recognized related to the Project during the three and six months ended June 30, 2019. The Company intends to pursue all remedies to recover from the General Contractor any amounts expended by the Company or the joint ventures in excess of their contractual obligations.

In addition to the costs to comply with the Company's obligations under its development cost guarantee, other claims related to the development of the Project have been asserted by the General Contractor and certain subcontractors. Should disputes with respect to these asserted claims proceed, the Company expects that it would assert claims against the General Contractor, both with respect to the claims as to which the above-described accrual has been made, as well as with respect to the additional claims described in this paragraph. There can be no assurances that amounts incurred, including as a result of such claims, will not exceed the above estimates. The Company is not able to reasonably estimate the amount of additional costs, if any, that it may incur as a result of such claims, and accordingly any potential exposure of the Company for such claims is not included within the accrual described above. Similarly, the Company is not able to reasonably estimate the amount, if any, that the Company may recover with respect to any claims it may assert against the General Contractor. If the Company were to incur additional expenses in connection with its development cost guarantee or in connection with such claims, such amounts would be accrued when they are determined to be probable of being incurred and are reasonably estimable, and could be material to the Company's results of operations in future periods. If the Company were to subsequently recover any of the cost overruns initially funded by the Company,

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whether pursuant to any such claims asserted by the Company or otherwise, such recoveries would be recorded when and if realized in future periods.

Properties in Operation

The composition of the Company’s Properties in Operation as of June 30, 2019 and 2018 was as follows (square feet in thousands):

	Rental Revenue Per Square Foot(1)				Total Square Feet Occupied		Percent Occupied
	June 30				June 30		June 30
	2019		2018		2019	2018	2019		2018
Wholly Owned Properties in Operation:	$	7.21	$	6.96	87,896	82,418	94.8	%	96.9	%
JV Properties in Operation: (2)	$	6.69	$	6.25	11,118	10,752	98.2	%	97.6	%
Properties in Operation:	$	7.15	$	6.88	99,014	93,170	95.2	%	97.0	%
Non-Core Properties	$	45.98	$	38.87	4,735	6,579	97.3	%	96.6	%

(1) Rental revenue represents the GAAP rent including variable payments per square foot at June 30, 2019 or 2018 for tenants in occupancy.

(2) JV Properties in Operation represents the properties owned by unconsolidated joint ventures in which the Company had an interest during the respective periods. Unconsolidated joint ventures in which the Company holds an interest owned 66 and 65 properties as of June 30, 2019 and 2018, respectively.

The table below details the vacancy activity during the six months ended June 30, 2019:

	Total Square Feet
	Wholly Owned Properties in Operation			JV Properties in Operation			Properties in Operation
Vacancy Activity
Vacancy at January 1, 2019	3,782,667			157,584			3,940,251
Acquisition vacant space	176,000			—			176,000
Completed development vacant space	437,505			—			437,505
Disposition vacant space	—			—			—
Expirations	13,904,460			2,442,533			16,346,993
Property structural changes/other	—			—			—
Leasing activity(1)	(13,434,491		)	(2,300,301		)	(15,734,792		)
Non-Core Activity	(23,709		)	(18,179		)	(41,888		)
Vacancy at June 30, 2019	4,842,432			281,637			5,124,069
Capital expenditures - turnover costs per square foot (2)	$	2.28		$	2.60		$	2.33

(1) Total leasing activity year to date is 14.6 million square feet for the Wholly Owned properties in Operation, 2.3 million square feet for the JV Properties in Operation and 16.9 million square feet for the total Properties in Operation. Total leasing activity on Properties in Operation includes leases on development and redevelopment properties.

(2) Capital expenditures - turnover costs include tenant improvement and lease transaction costs.

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Forward-Looking Statements

When used throughout this report, the words “believes,” “anticipates,” “estimates” and “expects” and similar expressions are intended to identify forward-looking statements. Such statements indicate that assumptions have been used that are subject to a number of risks and uncertainties that could cause actual financial results or management plans and objectives to differ materially from those projected or expressed herein. These risks, uncertainties and other factors include, without limitation, uncertainties affecting real estate business generally (such as entry into new leases, retention of leases and dependence on tenants’ business operations), risks relating to our ability to maintain and increase property occupancy and rental rates, risks relating to the continued repositioning of the Company's portfolio, risks relating to construction and development activities, risks relating to acquisition and disposition activities, risks relating to the integration of the operations of entities that we have acquired or may acquire, risks relating to joint venture relationships and any possible need to perform under certain guarantees that we have issued or may issue in connection with such relationships, risks related to properties developed by the Company on a fee basis, risks associated with tax abatement, tax credit programs, or other government incentives, possible environmental liabilities, risks relating to leverage and debt service (including availability of financing terms acceptable to the Company and sensitivity of the Company's operations and financing arrangements to fluctuations in interest rates), dependence on the primary markets in which the Company's properties are located, the existence of complex regulations relating to status as a REIT and the adverse consequences of the failure to qualify as a REIT, risks relating to litigation and the potential adverse impact of market interest rates on the market price for the Company's securities, and other risks and uncertainties detailed in the Company’s filings with the Securities and Exchange Commission. Given these risks and uncertainties, readers are cautioned not to place undue reliance on such statements.

Critical Accounting Policies and Estimates

Refer to the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 for a discussion of critical accounting policies which include capitalized costs, revenue recognition, collectibility of receivables, impairment charges - real estate assets, intangibles, investments in unconsolidated joint ventures and derivative instruments and hedging activities. During the six months ended June 30, 2019, there were no material changes to these policies except for the adoption of Accounting Standards Codification Topic 842 - Leases (see Note 1 to the Company's financial statements).

Results of Operations

The following discussion is based on the consolidated financial statements of the Company. It compares the results of operations of the Company for the three and six months ended June 30, 2019 with the results of operations of the Company for the three and six months ended June 30, 2018. As a result of the varying levels of development, acquisition and disposition activities the overall operating results of the Company during such periods are not directly comparable. However, certain data, including the Industrial Same Store comparison, do lend themselves to direct comparison.

This information should be read in conjunction with the accompanying consolidated financial statements and notes included elsewhere in this report.

Comparison of Three and Six Months Ended June 30, 2019 to Three and Six Months Ended June 30, 2018

Rental Revenue

Rental revenue was $160.4 million for the three months ended June 30, 2019 compared to $146.1 million for the same period in 2018. This increase of $14.3 million was primarily due to rental revenue related to acquisitions and completed development.

Rental revenue was $316.7 million for the six months ended June 30, 2019 compared to $291.5 million for the same period in 2018. This increase of $25.2 million was primarily due to increased rental revenue related to acquisitions, completed development and Industrial Same Store properties partially offset by a decrease from properties sold since January 1, 2018.

Rental Property Expense

Rental property expense was $14.1 million for the three months ended June 30, 2019 compared to $13.2 million for the same period in 2018. This increase was primarily due to rental property expense related to acquisitions and completed development.

Rental property expense was $27.8 million for the six months ended June 30, 2019 compared to $26.5 million for the same period in 2018. This increase was primarily due to rental property expense related to acquisitions and completed development.

Real Estate Taxes

Real estate taxes were $23.5 million for the three months ended June 30, 2019 compared to $21.8 million for the same period in 2018. This increase was primarily due to real estate taxes associated with acquisitions and completed development properties.

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Real estate taxes were $45.9 million for the six months ended June 30, 2019 compared to $43.3 million for the same period in 2018. This increase was primarily due to real estate taxes associated with acquired properties and completed development.

Segments

The Company evaluates the performance of the Wholly Owned Properties in Operation and Wholly Owned Properties held for Redevelopment in terms of NOI by reportable segment (see Note 6 to the Company’s financial statements for a reconciliation of this measure to income from continuing operations). The following table identifies changes to NOI in reportable segments (dollars in thousands):

 

	Three Months Ended				Percentage Increase (Decrease)			Six Months Ended				Percentage Increase (Decrease)
	June 30							June 30
	2019		2018					2019		2018
Carolinas/Richmond	$	14,836	$	13,930	6.5	%		$	29,281	$	27,820	5.3	%
Chicago/Minneapolis	10,831		9,700		11.7	%	(1)	21,144		19,313		9.5	%
Cincinnati/Columbus/Indianapolis	3,052		3,040		0.4	%		5,819		6,277		(7.3	%)
Dallas	3,731		2,888		29.2	%	(2)	7,268		5,353		35.8	%	(2)
Florida	10,752		10,528		2.1	%		22,161		21,096		5.0	%
Houston	9,394		8,756		7.3	%		18,193		18,066		0.7	%
Lehigh/Central PA	28,278		27,576		2.5	%		56,818		54,604		4.1	%
Philadelphia	8,694		7,921		9.8	%		17,219		16,826		2.3	%
Southern California	7,248		5,765		25.7	%	(2)	14,680		10,848		35.3	%	(2)
United Kingdom	4,942		2,311		113.8	%	(2)	8,237		5,495		49.9	%	(2)
Other	15,176		21,267		(28.6	%)	(3)	29,495		43,559		(32.3	%)	(3)
Total NOI	$	116,934	$	113,682	2.9	%		$	230,315	$	229,257	0.5	%

(1) The increase was primarily due to an increase in average occupancy.

(2) The increase was primarily due to an increase in average gross investment in operating real estate.

(3) The decrease was primarily due to a decrease in average gross investment in operating real estate.

Industrial Same Store

Property level operating income, exclusive of termination fees, for the Industrial Same Store properties is identified in the table below.

The Industrial Same Store results were affected by changes in occupancy and rental rates as detailed below.

	Three Months Ended						Six Months Ended
	June 30						June 30
	2019			2018			2019			2018
Average occupancy %	95.3		%	98.3		%	95.7		%	98.0		%
Average rental rate - rental revenue (1)	$	7.07		$	6.91		$	7.03		$	6.85

(1) Rental revenue represents the GAAP rent including variable payments per square foot at June 30, 2019 or 2018 for tenants in occupancy.

Management generally considers the performance of the Industrial Same Store properties to be a useful financial performance measure because the results are directly comparable from period to period. In addition, Industrial Same Store property level operating income and Industrial Same Store cash basis property level operating income are considered by management to be more reliable indicators of the portfolio’s baseline performance. Industrial Same Store properties include industrial operating properties that had reached stabilization as of January 1, 2018 (i.e., properties owned and stabilized in both the current and prior year), and exclude industrial properties held for redevelopment or that had been sold as of the end of the current quarter. As of June 30, 2019, there were 452 Industrial Same Store properties totaling 82.6 million square feet.

Set forth below is a schedule comparing the property level operating income, on a GAAP basis and on a cash basis, for the Industrial Same Store properties for the three and six months ended June 30, 2019 and 2018. Industrial Same Store property level operating income and cash basis property level operating income are non-GAAP measures and do not represent operating income because

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they do not reflect all of the consolidated operations of the Company. Investors should review Industrial Same Store results, along with NAREIT Funds from operations (see “Liquidity and Capital Resources” below), U.S. GAAP net income and cash flow from operating activities, investing activities and financing activities when considering the Company’s operating performance. Also set forth below is a reconciliation of Industrial Same Store property level operating income and cash basis property level operating income to net income (in thousands).

	Three Months Ended						Six Months Ended
	June 30, 2019			June 30, 2018			June 30, 2019			June 30, 2018
Reconciliation of non-GAAP financial measure – Industrial Same Store:
Net income	$	102,335		$	20,890		$	158,084		$	164,615
Discontinued operations	(48,239		)	(12,712		)	(63,766		)	(115,220		)
Equity in earnings of unconsolidated joint ventures	(2,181		)	(7,428		)	(9,190		)	(14,192		)
Income taxes	(261		)	911			571			1,440
Gain on property dispositions	(5,462		)	(48,584		)	(5,957		)	(52,742		)
Interest expense	25,406			21,454			50,903			42,944
Interest and other income	(7,998		)	(2,700		)	(11,256		)	(5,220		)
Impairment charges - real estate assets	—			26,000			99			26,000
Development service fee expense	847			79,808			1,680			107,875
Depreciation and amortization expense	43,032			40,076			86,430			79,582
Other operating expense	3,256			1,577			5,524			4,079
Leasing expense	3,318			2,767			6,526			5,579
General and administrative expense	9,693			8,832			25,298			23,159
Development service fee income	(978		)	(19,824		)	(1,842		)	(46,176		)
Termination fees	(208		)	(512		)	(505		)	(1,627		)
Non-same store properties NOI	(14,095		)	(2,339		)	(25,497		)	(5,094		)
Industrial Same Store property level operating income	108,465			108,216			217,102			215,002
Less straight line rent adjustment	1,132			3,936			2,915			8,577
Industrial Same Store cash basis property level operating income	$	107,333		$	104,280		$	214,187		$	206,425
Industrial Same Store:
Rental revenue	$	140,283		$	140,044		$	280,627		$	279,050
Operating expenses:
Rental property expense	(12,625		)	(12,229		)	(25,264		)	(24,864		)
Real estate taxes	(19,193		)	(19,599		)	(38,261		)	(39,184		)
Industrial Same Store property level operating income	108,465			108,216			217,102			215,002
Less straight line rent adjustment	1,132			3,936			2,915			8,577
Industrial Same Store cash basis property level operating income	$	107,333		$	104,280		$	214,187		$	206,425

Development Service Fee Income and Expense

Development Service fee activity changed to an aggregate net profit of $131,000 and $162,000 for the three and six months ended June 30, 2019, respectively, compared to an aggregate net loss of $60.0 million and $61.7 million for the three and six months ended June 30, 2018. The change was primarily due to a net loss on development service fee income and expense in the Company's Philadelphia reportable segment during the three and six months ended June 30, 2018. See Note 13 to the Company's financial statements.

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General and Administrative

General and administrative expenses increased to $9.7 million for the three months ended June 30, 2019 compared to $8.8 million for the three months ended June 30, 2018 and increased to $25.3 million for the six months ended June 30, 2019 compared to $23.2 million for the six months ended June 30, 2018. The increase between the three month periods was primarily due to annual compensation adjustments and increases in legal fees in 2019. The increase between the six month periods was primarily due to annual compensation adjustments and increases in accounting, consulting and legal fees in 2019, offset by a reduction in incentive compensation.

General and administrative expenses include salaries, wages and incentive compensation for general and administrative staff along with related costs, consulting, marketing, public company expenses and other general and administrative costs.

Leasing Expense

Leasing expense increased to $3.3 million for the three months ended June 30, 2019 compared to $2.8 million for the three months ended June 30, 2018 and increased to $6.5 million for six months ended June 30, 2019 compared to $5.6 million for six months ended June 30, 2018. These increases were primarily due to legal expenses related to leasing, which are now required to be expensed under the new lease accounting standard. During the three and six months ended June 30, 2018, these costs were capitalized.

Other Operating Expense

Other operating expenses increased to $3.3 million for the three months ended June 30, 2019 compared to $1.6 million for the three months ended June 30, 2018 and increased to $5.5 million for six months ended June 30, 2019 compared to $4.1 million for six months ended June 30, 2018. These increases were primarily due to an increase in severance costs.

Depreciation and Amortization

Depreciation and amortization increased to $43.0 million for the three months ended June 30, 2019 from $40.1 million for the three months ended June 30, 2018 and increased to $86.4 million for the six months ended June 30, 2019 compared to $79.6 million for the six months ended June 30, 2018. These increases were primarily due to increased depreciation and amortization related to acquisitions and completed development since January 1, 2018.

Interest Expense

Interest expense increased to $25.4 million for the three months ended June 30, 2019 from $21.5 million for the three months ended June 30, 2018. This increase was primarily due to an increase in average debt outstanding, which increased to $3,123.3 million for the three months ended June 30, 2019 compared to $2,897.2 million for the three months ended June 30, 2018. The increase was also due to an increase in the weighted average interest rate, which was 3.9% for the three months ended June 30, 2019 compared to 3.8% for the three months ended June 30, 2018. Interest expense was also partially offset by an increase in capitalization of interest, which increased by $0.3 million for the three months ended June 30, 2019 as compared to the three months ended June 30, 2018.

Interest expense increased to $50.9 million for the six months ended June 30, 2019 from $42.9 million for the six months ended June 30, 2018. This increase was primarily due to an increase in average debt outstanding, which increased to $3,122.3 million for the six months ended June 30, 2019 compared to $2,894.9 million for the six months ended June 30, 2018. The increase was also due to an increase in the weighted average interest rate, which was 3.9% for the six months ended June 30, 2019 compared to 3.8% for the six months ended June 30, 2018. Interest expense was also partially offset by an increase in capitalization of interest, which increased by $1.4 million for the six months ended June 30, 2019 as compared to the six months ended June 30, 2018.

Interest and Other Income

Interest and other income increased to $8.0 million for the three months ended June 30, 2019 compared to $2.7 million for the three months ended June 30, 2018 and increased to $11.3 million for the six months ended June 30, 2019 compared to $5.2 million for the six months ended June 30, 2018. These increases were primarily related to insurance proceeds recognized in income for the three and six months ended June 30, 2019.

Impairment charges - real estate assets

Impairment charges in continuing operations for the six months ended June 30, 2019 were $99,000. There were no impairment charges in continuing operations for the three months ended June 30, 2019. Impairment charges for the three and six months ended June 30, 2018 equaled $26.0 million and were related to the Camden Waterfront project in 2018. See Note 7 to the Company's financial statements.

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Equity in Earnings of Unconsolidated Joint Ventures

Equity in earnings of unconsolidated joint ventures decreased to $2.2 million for the three months ended June 30, 2019 compared to $7.4 million for the three months ended June 30, 2018 and decreased to $9.2 million for the six months ended June 30, 2019 compared to $14.2 million for the six months ended June 30, 2018. These decreases were primarily related to the Company's share of an impairment charge of $4.1 million related to a building held for sale and owned by a joint venture located in the Company's DC reportable segment and decreases in recognized gains on the sale of land leasehold interests in the Company's United Kingdom reportable segment. See Note 13 to the Company's financial statements.

Other

Gain on property dispositions decreased to $5.5 million for the three months ended June 30, 2019 compared to $48.6 million for the three months ended June 30, 2018 and decreased to $6.0 million for the six months ended June 30, 2019 compared to $52.7 million for the six months ended June 30, 2018. These changes resulted from the composition of sales included in continuing operations in 2019 as compared to 2018.

Income Tax

Income taxes changed to income of $0.3 million for the three months ended June 30, 2019 compared to income tax expense of $0.9 million for the three months ended June 30, 2018 and to income tax expense of $0.6 million for the six months ended June 30, 2019 compared to $1.4 million for the six months ended June 30, 2018. These changes resulted from refunds during 2019 in income taxes related to the United Kingdom reportable segment.

Discontinued Operations

A summary of the results of operations for the properties classified as discontinued operations through the respective disposition dates (if applicable) is as follows (in thousands):

	For the Three Months Ended						For the Six Months Ended
	June 30, 2019			June 30, 2018			June 30, 2019			June 30, 2018
Rental revenue	$	11,318		$	23,085		$	25,095		$	49,702
Operating expenses	(3,452		)	(5,253		)	(7,787		)	(11,952		)
Depreciation and amortization	(62		)	(3,073		)	(2,129		)	(8,472		)
Loss on debt extinguishment	(7,618		)	—			(7,618		)	—
Interest expense	(466		)	(1,748		)	(1,174		)	(3,717		)
Impairment charges - real estate assets	(4,018		)	—			(14,292		)	—
Interest and other income (expense)	(39		)	(29		)	(60		)	(58		)
Income taxes	(261		)	(30		)	(293		)	(55		)
Gain (loss) on property dispositions	52,837			(240		)	72,024			89,772
Income from discontinued operations	$	48,239		$	12,712		$	63,766		$	115,220

Changes in discontinued operations are reflective of the period of time the properties were held during the respective periods. To the extent that a property is sold, or completed and stabilized, during a period, it will only impact the results of such period prior to being sold or completed and stabilized, as the case may be. There were four properties classified as discontinued operations and sold during the three months ended June 30, 2019 and eight properties classified as discontinued operations sold during the six months ended June 30, 2019. In addition, during the three months ended June 30, 2019 the Company used the proceeds from the sale of a building in the Philadelphia reportable segment to repay a mortgage loan on the property and recognized a loss of $7.6 million on early extinguishment of debt. The Company also recognized an impairment loss related to an office building held for sale in the Company's DC Metro segment.

As a result of the foregoing factors, the Company’s net income increased to $102.3 million for the three months ended June 30, 2019 from $20.9 million for the three months ended June 30, 2018 and decreased to $158.1 million for the six months ended June 30, 2019 from $164.6 million for the six months ended June 30, 2018.

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Liquidity and Capital Resources

Overview

The Company seeks to maintain a conservative balance sheet and pursue a strategy of financial flexibility. The Company's liquidity requirements include operating and general and administrative expenses, shareholder distributions, funding its investment in development properties and joint ventures, funding its development cost guarantee (see Note 13 to the Company's consolidated financial statements) and satisfying interest requirements and debt maturities. The Company believes that proceeds from operating activities, asset sales, its available cash, borrowing capacity from its Credit Facilities (defined below) and its other sources of capital including the public debt and equity markets will provide it with sufficient funds to satisfy these obligations.

The Company is subject to financial covenants contained in some of its debt agreements, the most restrictive of which are related to the Company's Credit Facilities (defined below). As of June 30, 2019, the Company was in compliance with all financial covenants.

Activity

As of June 30, 2019, the Company had cash and cash equivalents of $38.4 million, including $17.4 million in restricted cash.

Net cash provided by operating activities decreased to $112.4 million for the six months ended June 30, 2019 from $198.6 million for the six months ended June 30, 2018. This $86.2 million decrease was due to net cash received on contractual receivables due from home builders relating to land sales in the UK in 2018, and payments in 2019 related to cost overruns on the Comcast Technology Center. See Note 13 to the Company's consolidated financial statements. Net cash provided by operating activities is the primary source of liquidity to fund distributions to shareholders and for recurring capital expenditures - property improvements and turnover costs for the Company’s Wholly Owned Properties in Operation.

Net cash used in investing activities decreased to $7.9 million for the six months ended June 30, 2019 from $67.0 million for the six months ended June 30, 2018. This $59.1 million decrease was primarily due to funding of the Comcast Technology Center joint ventures for completion of the development of the office portion of property during 2018 and relative acquisition and disposition activity for the comparative quarters.

Net cash used in financing activities increased to $163.4 million for the six months ended June 30, 2019 from $116.5 million for the six months ended June 30, 2018. This $46.9 million increase was primarily due to debt activity associated with the investment activity during the respective periods. In January 2019, the Company issued $350 million of 4.375% senior unsecured notes due 2029. A substantial portion of the proceeds from this financing were used to repay the Company's credit facilities with the exception of the DDTL (as defined below). The remainder was held in cash. Financing activities include proceeds from the issuance of debt and equity, debt repayments, equity repurchases and distributions.

The Company has a $900 million unsecured credit facility (the "Credit Facility") which includes a revolving credit facility for borrowings up to $800 million and a delayed draw term loan facility (the "DDTL") aggregating up to $100 million. It matures in October 2021 and the Company has options to extend the maturity date for up to one additional year. Based upon the Company’s current credit ratings, borrowings under the facility bear interest at LIBOR plus 87.5 basis points for revolving loans and 95 basis points for delayed draw term loans. There is also a 15 basis point annual facility fee on the aggregate loan commitments of the revolving credit facility. The Credit Facility contains a competitive bid option, whereby participating lenders bid on the interest rate to be charged. This feature is available for up to 50% of the amount of the revolving credit facility. As of June 30, 2019, the Company had no outstanding borrowings and $8.3 million of letters of credit issued under the revolving credit facility, and $100 million in outstanding borrowings under the DDTL.

The Company also has a $30 million unsecured working capital revolving credit facility ("WCL", together the "Credit Facilities") on terms substantially consistent with the Credit Facility discussed above. As of June 30, 2019, the Company had no outstanding borrowings under the WCL.

The Company uses debt financing to lower its overall cost of capital in an attempt to increase the return to shareholders. The Company staggers its debt maturities and maintains debt levels it considers to be prudent. In determining its debt levels, the Company considers various financial measures including the debt to gross assets ratio and the fixed charge coverage ratio. As of June 30, 2019, the Company’s debt to gross assets ratio was 38.9% and for the six months ended June 30, 2019, the fixed charge coverage ratio was 3.7x. Debt to gross assets equals total long-term debt and borrowings under the Credit Facilities divided by total assets plus accumulated depreciation (including accumulated depreciation in properties held for sale). The fixed charge coverage ratio equals net income, after adjusting for depreciation and amortization expense, interest expense, impairment charges and the effect of other non-cash items, debt extinguishment gains (losses), gains (losses) on property dispositions, income tax expense (benefit) and share-based compensation expenses, divided by the sum of consolidated interest expense, capitalized interest,

44

preferred dividends, and debt principal amortization (excluding balloon payments) all inclusive of operations included in discontinued operations.

As of June 30, 2019, $350.7 million in mortgage loans (including $65.7 million fixed via a swap arrangement - see Note 14 to the Company's financial statements) and $2.7 billion in unsecured notes were outstanding with a weighted average interest rate of 3.9%. The interest rates on $3.0 billion of mortgage loans and unsecured notes are fixed (including those fixed via swap arrangements) and range from 2.6% to 4.8%. The weighted average remaining term for the mortgage loans and unsecured notes is 5.1 years.

The scheduled principal amortization and maturities of the Company’s mortgage loans, unsecured notes and the Credit Facilities and the related weighted average interest rates as of June 30, 2019 are as follows (in thousands, except percentages):

													Weighted
	Mortgages												Average
	Principal		Principal		Unsecured			Credit					Interest
	Amortization		Maturities		Notes			Facilities		Total			Rate
2019	$	2,313	$	46,922	$	—		$	—	$	49,235		4.0	%
2020	1,673		67,361		350,000			—		419,034			4.7	%
2021	545		65,009		—			100,000		165,554			3.6	%
2022	116		—		400,000			—		400,116			4.1	%
2023	123		—		300,000			—		300,123			3.4	%
2024	130		—		450,000			—		450,130			4.4	%
2025	138		—		400,000			—		400,138			3.8	%
2026	—		1,946		400,000			—		401,946			3.3	%
2027	—		—		—			—		—			—	%
2028 and thereafter	—		164,400		350,000			—		514,400			3.8	%
Subtotal	5,038		345,638		2,650,000			100,000		3,100,676			3.9	%
Reconciling items (1)	817		—		(17,119		)	—		(16,302		)
Total for consolidated balance sheet	$	5,855	$	345,638	$	2,632,881		$	100,000	$	3,084,374

(1) Includes deferred financing costs, premium/discount and market adjustments.

Generally, the Company’s objective is to meet its short-term liquidity requirement of funding the payment of its current level of quarterly preferred and common distributions to shareholders and unitholders through its net cash flows provided by operating activities, less capital expenditures - property improvement and turnover costs. If net cash flows from operations were not sufficient to meet its quarterly distributions to shareholders and unitholders, the Company would utilize borrowings from the Credit Facilities to fund such distributions.  

The Company believes that its existing sources of capital will provide sufficient funds to finance its continued development and acquisition activities. The Company's existing sources of capital include the public debt and equity markets, proceeds from secured financing of properties, proceeds from property dispositions, equity capital from joint venture partners, remaining capacity of $125.0 million under the Company's at-the-market equity offering program and net cash provided by operating activities. Additionally, the Company expects to incur variable rate debt, including borrowings under the Credit Facilities, from time to time.

The Company's latest quarterly dividend (paid in July 2019) was $0.41 per share ($1.64 per share annualized). Future distribution payments by the Company will be paid at the discretion of the Board of Trustees and will depend on the Company's actual funds from operations and cash flows, the Company’s financial condition and capital requirements, the annual distribution requirements under the REIT provisions of the Internal Revenue Code and other factors that the Board of Trustees deems relevant. The Company’s Board of Trustees reviews the dividend quarterly, and there can be no assurance about the amount of future quarterly distribution payments.

General

The Company has an effective S-3 shelf registration statement on file with the SEC pursuant to which the Trust and the Operating Partnership may issue an unlimited amount of equity securities and debt securities.

45

Calculation of Funds from Operations

The National Association of Real Estate Investment Trusts (“NAREIT”) has issued a standard definition for NAREIT Funds from operations ("NAREIT FFO") (defined below). The SEC has agreed to the disclosure of this non-GAAP financial measure on a per share basis in its Release No. 34-47226, Conditions for Use of Non-GAAP Financial Measures. The Company believes that the calculation of NAREIT FFO is helpful to investors and management as it is a measure of the Company’s operating performance that excludes depreciation and amortization and gains and losses from dispositions of depreciable property. As a result, year over year comparison of NAREIT FFO reflects the impact on operations from trends in occupancy rates, rental rates, operating costs, development activities, general and administrative expenses, and interest costs, providing perspective not immediately apparent from net income. In addition, management believes that NAREIT FFO provides useful information to the investment community about the Company’s financial performance when compared to other REITs since NAREIT FFO is generally recognized as the standard for reporting the operating performance of a REIT. NAREIT FFO is defined by NAREIT as follows: net income (computed in accordance with U.S. GAAP), excluding depreciation and amortization related to real estate, gains and losses from the sale of certain real estate assets, gains and losses from change in control, and impairment write-downs of certain real estate assets and investments in entities when the impairment is directly attributable to decreases in the value of depreciable real estate held by the entity. The Company has opted to include gains and losses from the sale of assets incidental to its main business as a REIT. NAREIT FFO does not represent net income or cash flows from operations as defined by U.S. GAAP and does not necessarily indicate that cash flows will be sufficient to fund cash needs. It should not be considered as an alternative to net income as an indicator of the Company’s operating performance or to cash flows as a measure of liquidity. NAREIT FFO also does not represent cash flows generated from operating, investing or financing activities as defined by U.S. GAAP.

A reconciliation of net income available to common shareholders to NAREIT FFO available to common shareholders for the three and six months ended June 30, 2019 and 2018 are as follows (in thousands, except per share amounts):

	Three Months Ended						Six Months Ended
	June 30, 2019			June 30, 2018			June 30, 2019			June 30, 2018
Reconciliation of net income available to common shareholders to NAREIT FFO available to common shareholders:
Net income available to common shareholders	$	99,769		$	19,614		$	154,100		$	159,795
Adjustments:
Depreciation and amortization of unconsolidated joint ventures	3,026			3,236			6,158			6,438
Depreciation and amortization	42,704			42,682			87,737			87,172
Loss on property dispositions / impairment - depreciable real estate assets of unconsolidated joint ventures	4,098			—			4,098			—
Loss (gain) on property dispositions / impairment - depreciable real estate assets continuing operations	13			(48,614		)	(35		)	(51,210		)
(Gain) loss on property dispositions / impairment - depreciable real estate assets discontinued operations	(48,383		)	238			(57,296		)	(89,811		)
Noncontrolling interest share in addback for depreciation and amortization and gain on property dispositions / impairment - depreciable real estate assets	(34		)	57			(944		)	1,103
NAREIT FFO available to common shareholders – basic	$	101,193		$	17,213		$	193,818		$	113,487
Noncontrolling interest share in addback for depreciation and amortization and gain on property dispositions / impairment charges - depreciable real estate assets	34			(57		)	944			(1,103		)
Noncontrolling interest less preferred unit distributions	2,359			467			3,649			3,806
NAREIT FFO available to common shareholders – diluted	$	103,586		$	17,623		$	198,411		$	116,190
Basic NAREIT FFO available to common shareholders per weighted average share	$	0.68		$	0.12		$	1.31		$	0.77
Diluted NAREIT FFO available to common shareholders per weighted average share	$	0.68		$	0.12		$	1.30		$	0.77
Reconciliation of weighted average shares:
Weighted average common shares	147,805			147,274			147,706			147,184
Dilutive shares for long term compensation plans	863			1,059			900			920
Diluted shares for net income	148,668			148,333			148,606			148,104
Weighted average common units	3,514			3,520			3,517			3,520
Diluted shares for NAREIT FFO	152,182			151,853			152,123			151,624

46

Inflation

Inflation has remained relatively low in recent years, and as a result, it has not had a significant impact on the Company during this period. To the extent an increase in inflation would result in increased operating costs, such as insurance, real estate taxes and utilities, substantially all of the tenants’ leases require the tenants to absorb these costs as part of their rental obligations. In addition, inflation also may have the effect of increasing market rental rates.

Item 3. Quantitative and Qualitative Disclosures about Market Risk

There have been no material changes to the Company’s exposure to market risk since its Annual Report on Form 10-K for the year ended December 31, 2018.

Item 4. Controls and Procedures

Controls and Procedures with respect to the Trust

(a) Evaluation of Disclosure Controls and Procedures

The Trust’s management, with the participation of its Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of its disclosure controls and procedures (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) as of the end of the period covered by this report. Based on this evaluation, the Trust’s Chief Executive Officer and Chief Financial Officer have concluded that the Trust’s disclosure controls and procedures, as of the end of the period covered by this report, were effective to provide reasonable assurance that information required to be disclosed by the Trust in its reports filed or submitted under the Exchange Act is (i) recorded, processed, summarized and reported within the time periods specified in SEC’s rules and forms and (ii) accumulated and communicated to the Trust’s management, including its principal executive and principal financial officers, or persons performing similar function, as appropriate to allow timely decisions regarding required disclosure.

(b) Changes in Internal Control Over Financial Reporting

There were no changes in the Trust’s internal control over financial reporting during the quarter ended June 30, 2019 that have materially affected or are reasonably likely to materially affect the Trust’s internal control over financial reporting.

Subsequent to June 30, 2019, the Trust completed implementation of the first phase of a new enterprise resource planning (ERP) system, which is designed to replace or enhance certain internal financial and operating systems. In connection with the ERP implementation, subsequent to June 30, 2019, we updated the processes and controls that comprise our internal control over financial reporting, as necessary, to accommodate related changes to our accounting procedures and business processes.

Controls and Procedures with respect to the Operating Partnership

(a) Evaluation of Disclosure Controls and Procedures

The Trust’s management, with the participation of its Chief Executive Officer and Chief Financial Officer, on behalf of the Trust in its capacity as the general partner of the Operating Partnership, evaluated the effectiveness of its disclosure controls and procedures (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) as of the end of the period covered by this report. Based on this evaluation, the Trust’s Chief Executive Officer and Chief Financial Officer have concluded that the Operating Partnership’s disclosure controls and procedures, as of the end of the period covered by this report, were effective to provide reasonable assurance that information required to be disclosed by the Operating Partnership in its reports filed or submitted under the Exchange Act is (i) recorded, processed, summarized and reported within the time periods specified in SEC’s rules and forms and (ii) accumulated and communicated to the Trust’s management, including its principal executive and principal financial officers, or persons performing similar function, as appropriate to allow timely decisions regarding required disclosure.

(b) Changes in Internal Control Over Financial Reporting

There were no changes in the Operating Partnership’s internal control over financial reporting during the quarter ended June 30, 2019 that have materially affected or are reasonably likely to materially affect the Operating Partnership’s internal control over financial reporting.

Subsequent to June 30, 2019, the Operating Partnership completed implementation of the first phase of a new enterprise resource planning (ERP) system, which is designed to replace or enhance certain internal financial and operating systems. In connection

47

with the ERP implementation, subsequent to June 30, 2019, we updated the processes and controls that comprise our internal control over financial reporting, as necessary, to accommodate related changes to our accounting procedures and business processes.

48

PART II. OTHER INFORMATION

Item 1. Legal Proceedings

The Company is not a party to any material litigation as of June 30, 2019.

Item 1A. Risk Factors

None.

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

None.

Item 3. Defaults upon Senior Securities

None.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

None.

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Item 6. Exhibits

31.1*	Certification of the Chief Executive Officer of Liberty Property Trust required by Rule 13a-14(a) under the Securities Exchange Act of 1934.
31.2*	Certification of the Chief Financial Officer of Liberty Property Trust required by Rule 13a-14(a) under the Securities Exchange Act of 1934.
31.3*	Certification of the Chief Executive Officer of Liberty Property Trust, in its capacity as the general partner of Liberty Property Limited Partnership, required by Rule 13a-14(a) under the Securities Exchange Act of 1934.
31.4*	Certification of the Chief Financial Officer of Liberty Property Trust, in its capacity as the general partner of Liberty Property Limited Partnership, required by Rule 13a-14(a) under the Securities Exchange Act of 1934.
32.1**	Certification of the Chief Executive Officer of Liberty Property Trust required under Rule 13a-14(b) of the Securities Exchange Act of 1934, as amended. (This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. Further, this exhibit shall not be deemed to be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.)
32.2**	Certification of the Chief Financial Officer of Liberty Property Trust required by Rule 13a-14(b) under the Securities Exchange Act of 1934, as amended. (This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. Further, this exhibit shall not be deemed to be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.)
32.3**	Certification of the Chief Executive Officer of Liberty Property Trust, in its capacity as the general partner of Liberty Property Limited Partnership, required by Rule 13a-14(b) under the Securities Exchange Act of 1934, as amended. (This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. Further, this exhibit shall not be deemed to be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.)
32.4**	Certification of the Chief Financial Officer of Liberty Property Trust, in its capacity as the general partner of Liberty Property Limited Partnership, required by Rule 13a-14(b) under the Securities Exchange Act of 1934, as amended. (This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. Further, this exhibit shall not be deemed to be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.)
101.INS*	XBRL Instance Document.
101.SCH*	XBRL Taxonomy Extension Schema Document.
101.CAL*	XBRL Taxonomy Extension Calculation Linkbase Document.
101.DEF*	XBRL Taxonomy Extension Definition Linkbase Document.
101.LAB*	XBRL Extension Labels Linkbase.
101.PRE*	XBRL Taxonomy Extension Presentation Linkbase Document.

________________________

*    Filed herewith

**    Furnished herewith

50

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

LIBERTY PROPERTY TRUST

/s/ WILLIAM P. HANKOWSKY	August 2, 2019
William P. Hankowsky	Date
Chairman of the Board of Trustees, President and Chief Executive Officer (Principal Executive Officer)
/s/ CHRISTOPHER J. PAPA	August 2, 2019
Christopher J. Papa	Date
Executive Vice President and Chief Financial Officer (Principal Financial Officer)

51

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

LIBERTY PROPERTY LIMITED PARTNERSHIP

BY:	Liberty Property Trust
	General Partner
/s/ WILLIAM P. HANKOWSKY		August 2, 2019
William P. Hankowsky		Date
Chairman of the Board of Trustees, President and Chief Executive Officer (Principal Executive Officer)
/s/ CHRISTOPHER J. PAPA		August 2, 2019
Christopher J. Papa		Date
Executive Vice President and Chief Financial Officer (Principal Financial Officer)

52

EX-31.1

Exhibit 31.1

LIBERTY PROPERTY TRUST

CERTIFICATIONS REQUIRED BY

RULE 13a-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934

I, William P. Hankowsky, certify that:

1. I have reviewed this Form 10-Q of Liberty Property Trust;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting,

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	August 2, 2019	By: /s/ WILLIAM P. HANKOWSKY
		William P. Hankowsky
		Chairman, President and Chief Executive Officer

EX-31.2

Exhibit 31.2

LIBERTY PROPERTY TRUST

CERTIFICATIONS REQUIRED BY

RULE 13a-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934

I, Christopher J. Papa, certify that:

1. I have reviewed this Form 10-Q of Liberty Property Trust;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting,

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	August 2, 2019	By: /s/ CHRISTOPHER J. PAPA
		Christopher J. Papa
		Executive Vice President and Chief Financial Officer

EX-31.3

Exhibit 31.3

LIBERTY PROPERTY LIMITED PARTNERSHIP

CERTIFICATIONS REQUIRED BY

RULE 13a-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934

I, William P. Hankowsky, certify that:

1. I have reviewed this Form 10-Q of Liberty Property Limited Partnership;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting,

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	August 2, 2019	By: /s/ WILLIAM P. HANKOWSKY
		William P. Hankowsky
		Chairman, President and Chief Executive Officer of
		Liberty Property Trust, the Registrant’s sole general partner

EX-31.4

Exhibit 31.4

LIBERTY PROPERTY LIMITED PARTNERSHIP

CERTIFICATIONS REQUIRED BY

RULE 13a-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934

I, Christopher J. Papa, certify that:

1. I have reviewed this Form 10-Q of Liberty Property Limited Partnership;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting,

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	August 2, 2019	By: /s/ CHRISTOPHER J. PAPA
		Christopher J. Papa
		Executive Vice President and Chief Financial Officer of Liberty Property Trust, the Registrant’s sole general partner

EX-32.1

Exhibit 32.1

LIBERTY PROPERTY TRUST

CERTIFICATIONS REQUIRED BY

RULE 13a-14(b) UNDER THE SECURITIES EXCHANGE ACT OF 1934

In connection with the Quarterly Report of Liberty Property Trust (the “Company”) on Form 10-Q for the quarterly period ended June 30, 2019 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, WILLIAM P. HANKOWSKY, President and Chief Executive Officer of the Company, certify in connection with Rule 13a-14(b) under the Securities Exchange Act of 1934, as amended, that based on my knowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

/s/ WILLIAM P. HANKOWSKY
William P. Hankowsky
Chairman, President and Chief Executive Officer
Date:	August 2, 2019

EX-32.2

Exhibit 32.2

LIBERTY PROPERTY TRUST

CERTIFICATIONS REQUIRED BY

RULE 13a-14(b) UNDER THE SECURITIES EXCHANGE ACT OF 1934

In connection with the Quarterly Report of Liberty Property Trust (the “Company”) on Form 10-Q for the quarterly period ended June 30, 2019, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, CHRISTOPHER J. PAPA., Executive Vice President and Chief Financial Officer of the Company, certify in connection with Rule 13a-14(b) under the Securities Exchange Act of 1934, as amended, that based on my knowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

/s/ CHRISTOPHER J. PAPA
Christopher J. Papa
Executive Vice President and Chief Financial Officer
Date:	August 2, 2019

EX-32.3

Exhibit 32.3

LIBERTY PROPERTY LIMITED PARTNERSHIP

CERTIFICATIONS REQUIRED BY

RULE 13a-14(b) UNDER THE SECURITIES EXCHANGE ACT OF 1934

In connection with the Quarterly Report of Liberty Property Limited Partnership (the “Company”) on Form 10-Q for the quarterly period ended June 30, 2019, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, WILLIAM P. HANKOWSKY, President and Chief Executive Officer of Liberty Property Trust (the sole general partner of the Company), certify in connection with Rule 13a-14(b) under the Securities Exchange Act of 1934, as amended, that based on my knowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

/s/ WILLIAM P. HANKOWSKY
William P. Hankowsky
Chairman, President and Chief Executive Officer of Liberty Property Trust, the Company’s sole general partner
Date:	August 2, 2019

EX-32.4

Exhibit 32.4

LIBERTY PROPERTY LIMITED PARTNERSHIP

CERTIFICATIONS REQUIRED BY

RULE 13a-14(b) UNDER THE SECURITIES EXCHANGE ACT OF 1934

In connection with the Quarterly Report of Liberty Property Limited Partnership (the “Company”) on Form 10-Q for the quarterly period ended June 30, 2019, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, CHRISTOPHER J. PAPA, Executive Vice President and Chief Financial Officer of Liberty Property Trust (the sole general partner of the Company), certify in connection with Rule 13a-14(b) under the Securities Exchange Act of 1934, as amended, that based on my knowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

/s/ CHRISTOPHER J. PAPA
Christopher J. Papa
Executive Vice President and Chief Financial Officer of Liberty Property Trust, the Company’s sole general partner
Date:	August 2, 2019

XML

Document and Entity Information Document - shares	6 Months Ended
	Jun. 30, 2019	Jul. 30, 2019
Entity Information [Line Items]
Title of 12(g) Security	Common Shares of Beneficial Interest, $0.001 par value
Entity Registrant Name	LIBERTY PROPERTY TRUST
Entity Tax Identification Number	23-7768996
Entity Address, Address Line One	650 East Swedesford Road
Entity Address, City or Town	Wayne,
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19087
Trading Symbol	LPT
City Area Code	610
Local Phone Number	648-1700
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity Central Index Key	0000921112
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2019
Entity File Number	1-13130
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Entity Emerging Growth Company	false
Entity Small Business	false
Amendment Flag	false
Entity Common Stock, Shares Outstanding		148,426,042
Security Exchange Name	NYSE
Document Quarterly Report	true
Document Transition Report	false
Entity Incorporation, State or Country Code	MD
Liberty Property Limited Partnership
Entity Information [Line Items]
Entity Registrant Name	LIBERTY PROPERTY LIMITED PARTNERSHIP
Entity Tax Identification Number	23-2766549
Entity Central Index Key	0000921113
Entity File Number	1-13132
Entity Incorporation, State or Country Code	PA

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Real estate:
Land and land improvements	$ 1,339,483	$ 1,236,514
Building and improvements	4,612,859	4,397,049
Less accumulated depreciation	(1,004,624)	(941,299)
Operating real estate	4,947,718	4,692,264
Development in progress	416,035	462,572
Land held for development	303,135	296,244
Net real estate	5,666,888	5,451,080
Cash and cash equivalents	21,039	84,923
Restricted cash	17,392	10,899
Accounts receivable	12,458	14,109
Deferred rent receivable	118,230	111,372
Deferred financing and leasing costs, net of accumulated amortization (June 30, 2019, $183,418; December 31, 2018, $165,553)	163,566	157,823
Investments in and advances to unconsolidated joint ventures	350,768	350,981
Assets held for sale	386,726	502,207
Right of use asset	17,931	0
Prepaid expenses and other assets	127,261	251,000
Total assets	6,882,259	6,934,394
LIABILITIES
Mortgage loans, net	351,493	395,202
Unsecured notes, net	2,632,881	2,285,698
Credit facilities	100,000	411,846
Accounts payable	46,405	62,943
Accrued interest	28,021	22,309
Dividend and distributions payable	62,241	60,560
Lease liabilities	18,617	0
Other liabilities	200,867	270,396
Liabilities held for sale	19,033	21,131
Total liabilities	3,459,558	3,530,085
Noncontrolling interest - operating partnership - 213,483 and 301,483 preferred units outstanding as of June 30, 2019 and December 31, 2018, respectively	5,337	7,537
EQUITY
Common shares of beneficial interest, $.001 par value, 283,987,000 shares authorized; 148,297,283 and 147,899,354 shares issued and outstanding as of June 30, 2019 and December 31, 2018, respectively	148	148
Additional paid-in capital	3,687,085	3,691,778
Accumulated other comprehensive loss	(57,674)	(55,243)
Distributions in excess of net income	(274,311)	(306,822)
Total Liberty Property Trust shareholders’ equity	3,355,248	3,329,861
Noncontrolling interest - operating partnership
Noncontrolling interest – operating partnership - 3,513,049 and 3,520,205 common units outstanding as of June 30, 2019 and December 31, 2018, respectively	61,839	61,471
Noncontrolling interest – consolidated joint ventures	277	5,440
Total equity	3,417,364	3,396,772
Total liabilities, noncontrolling interest - operating partnership and equity	6,882,259	6,934,394
Liberty Property Limited Partnership
Real estate:
Land and land improvements	1,339,483	1,236,514
Building and improvements	4,612,859	4,397,049
Less accumulated depreciation	(1,004,624)	(941,299)
Operating real estate	4,947,718	4,692,264
Development in progress	416,035	462,572
Land held for development	303,135	296,244
Net real estate	5,666,888	5,451,080
Cash and cash equivalents	21,039	84,923
Restricted cash	17,392	10,899
Accounts receivable	12,458	14,109
Deferred rent receivable	118,230	111,372
Deferred financing and leasing costs, net of accumulated amortization (June 30, 2019, $183,418; December 31, 2018, $165,553)	163,566	157,823
Investments in and advances to unconsolidated joint ventures	350,768	350,981
Assets held for sale	386,726	502,207
Right of use asset	17,931	0
Prepaid expenses and other assets	127,261	251,000
Total assets	6,882,259	6,934,394
LIABILITIES
Mortgage loans, net	351,493	395,202
Unsecured notes, net	2,632,881	2,285,698
Credit facilities	100,000	411,846
Accounts payable	46,405	62,943
Accrued interest	28,021	22,309
Dividend and distributions payable	62,241	60,560
Lease liabilities	18,617	0
Other liabilities	200,867	270,396
Liabilities held for sale	19,033	21,131
Total liabilities	3,459,558	3,530,085
Noncontrolling interest - operating partnership - 213,483 and 301,483 preferred units outstanding as of June 30, 2019 and December 31, 2018, respectively	5,337	7,537
EQUITY
General partner’s equity - 148,297,283 and 147,899,354 common units outstanding as of June 30, 2019 and December 31, 2018, respectively	3,355,248	3,329,861
Limited partners’ equity – 3,513,049 and 3,520,205 common units outstanding as of June 30, 2019 and December 31, 2018, respectively	61,839	61,471
Noncontrolling interest - operating partnership
Noncontrolling interest – consolidated joint ventures	277	5,440
Total equity	3,417,364	3,396,772
Total liabilities, noncontrolling interest - operating partnership and equity	$ 6,882,259	$ 6,934,394

XML

Consolidated Balance Sheets (Parentheticals) - $ / shares	Jun. 30, 2019	Dec. 31, 2018
Limited Partners' common units outstanding	3,513,049	3,520,205
Common shares of beneficial interest, par value per share	$ 0.001	$ 0.001
Common shares of beneficial interest, shares authorized	283,987,000	283,987,000
Common shares of beneficial interest, shares issued	148,297,283	147,899,354
Common shares of beneficial interest, shares outstanding		147,899,354
Liberty Property Limited Partnership
Limited Partners' common units outstanding	3,513,049	3,520,205
Common shares of beneficial interest, shares outstanding	148,297,283	147,899,354
Series I-2
Noncontrolling interest - operating partnership, preferred units outstanding	213,483	301,483
Series I-2 | Liberty Property Limited Partnership
Noncontrolling interest - operating partnership, preferred units outstanding	213,483	301,483

XML

Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Noncontrolling Interest in Net Income (Loss) Operating Partnerships, Redeemable	$ 2,443	$ 585	$ 3,817	$ 4,042
REVENUE
Rental revenue	160,359	146,107	316,732	291,482
Development service fee income	978	19,824	1,842	46,176
Total revenue	161,337	165,931	318,574	337,658
EXPENSES
Rental property	14,104	13,247	27,768	26,464
Real estate taxes	23,487	21,793	45,860	43,295
General and administrative	9,693	8,832	25,298	23,159
Leasing expense	3,318	2,767	6,526	5,579
Other Cost and Expense, Operating	3,256	1,577	5,524	4,079
Interest expense	25,406	21,454	50,903	42,944
Depreciation and amortization	43,032	40,076	86,430	79,582
Development service fee expense	847	79,808	1,680	107,875
Impairment charges - real estate assets	0	26,000	99	26,000
Total expenses	123,143	215,554	250,088	358,977
OTHER INCOME (EXPENSE)
Interest and other income	7,998	2,700	11,256	5,220
Gain on property dispositions	5,462	48,584	5,957	52,742
Equity in earnings of unconsolidated joint ventures	2,181	7,428	9,190	14,192
Income from continuing operations before income taxes	53,835	9,089	94,889	50,835
Income taxes	261	(911)	(571)	(1,440)
Income from continuing operations	54,096	8,178	94,318	49,395
Income from discontinued operations	48,239	12,712	63,766	115,220
Net income	102,335	20,890	158,084	164,615
Noncontrolling interest - consolidated joint ventures	(123)	(691)	(167)	(778)
Net income available to common shareholders	99,769	19,614	154,100	159,795
Comprehensive income attributable to common shareholders
Net income	102,335	20,890	158,084	164,615
Other comprehensive loss - foreign currency translation	(5,894)	(14,138)	(518)	(6,206)
Other comprehensive income (loss) - derivative instruments	(116)	102	(1,970)	487
Other comprehensive income	(6,010)	(14,036)	(2,488)	(5,719)
Total comprehensive income	96,325	6,854	155,596	158,896
Less: comprehensive income attributable to noncontrolling interest	(2,427)	(949)	(3,927)	(4,687)
Comprehensive income attributable to parent	$ 93,898	$ 5,905	$ 151,669	$ 154,209
Weighted average number of common shares or units outstanding
Basic (in shares)	147,805	147,274	147,706	147,184
Diluted (in shares)	148,668	148,333	148,606	148,104
Amounts attributable to common shareholders or unitholders
Income from continuing operations net of noncontrolling interest	$ 52,764	$ 7,308	$ 92,000	$ 47,447
Income from discontinued operations	47,005	12,306	62,100	112,348
Net income available to common shareholders	99,769	19,614	154,100	159,795
Liberty Property Limited Partnership
REVENUE
Rental revenue	160,359	146,107	316,732	291,482
Development service fee income	978	19,824	1,842	46,176
Total revenue	161,337	165,931	318,574	337,658
EXPENSES
Rental property	14,104	13,247	27,768	26,464
Real estate taxes	23,487	21,793	45,860	43,295
General and administrative	9,693	8,832	25,298	23,159
Leasing expense	3,318	2,767	6,526	5,579
Other Cost and Expense, Operating	3,256	1,577	5,524	4,079
Interest expense	25,406	21,454	50,903	42,944
Depreciation and amortization	43,032	40,076	86,430	79,582
Development service fee expense	847	79,808	1,680	107,875
Impairment charges - real estate assets	0	26,000	99	26,000
Total expenses	123,143	215,554	250,088	358,977
OTHER INCOME (EXPENSE)
Interest and other income	7,998	2,700	11,256	5,220
Gain on property dispositions	5,462	48,584	5,957	52,742
Equity in earnings of unconsolidated joint ventures	2,181	7,428	9,190	14,192
Income from continuing operations before income taxes	53,835	9,089	94,889	50,835
Income taxes	261	(911)	(571)	(1,440)
Income from continuing operations	54,096	8,178	94,318	49,395
Income from discontinued operations	48,239	12,712	63,766	115,220
Net income	102,335	20,890	158,084	164,615
Noncontrolling interest - consolidated joint ventures	(123)	(691)	(167)	(778)
Preferred unit distributions	84	118	168	236
Net income available to common shareholders	102,128	20,081	157,749	163,601
Comprehensive income attributable to common shareholders
Net income	102,335	20,890	158,084	164,615
Other comprehensive loss - foreign currency translation	(5,894)	(14,138)	(518)	(6,206)
Other comprehensive income (loss) - derivative instruments	(116)	102	(1,970)	487
Other comprehensive income	(6,010)	(14,036)	(2,488)	(5,719)
Total comprehensive income	$ 96,325	$ 6,854	$ 155,596	$ 158,896
Weighted average number of common shares or units outstanding
Basic (in shares)	151,319	150,794	151,223	150,704
Diluted (in shares)	152,182	151,853	152,123	151,624
Amounts attributable to common shareholders or unitholders
Income from continuing operations net of noncontrolling interest	$ 54,093	$ 7,597	$ 94,338	$ 48,804
Income from discontinued operations	48,119	12,602	63,579	115,033
Net income available to common shareholders	102,128	20,081	157,749	163,601
Net income allocated to general partners	99,769	19,614	154,100	159,795
Net income allocated to limited partners	$ 2,443	$ 585	$ 3,817	$ 4,042
Common Units | Liberty Property Limited Partnership
Basic:
Income from continuing operations (in usd per share)	$ 0.36	$ 0.05	$ 0.62	$ 0.33
Income from discontinued operations (in usd per share)	0.32	0.08	0.42	0.76
Earnings Per Share, Basic	0.68	0.13	1.04	1.09
Diluted:
Income from continuing operations (in usd per share)	0.35	0.05	0.62	0.32
Income from discontinued operations (in usd per share)	0.32	0.08	0.42	0.76
Earnings Per Share, Diluted	0.67	0.13	1.04	1.08
Common shares
Basic:
Income from continuing operations (in usd per share)	0.36	0.05	0.62	0.33
Income from discontinued operations (in usd per share)	0.32	0.08	0.42	0.76
Earnings Per Share, Basic	0.68	0.13	1.04	1.09
Diluted:
Income from continuing operations (in usd per share)	0.35	0.05	0.62	0.32
Income from discontinued operations (in usd per share)	0.32	0.08	0.42	0.76
Earnings Per Share, Diluted	$ 0.67	$ 0.13	$ 1.04	$ 1.08
Discontinued operations
OTHER INCOME (EXPENSE)
Income taxes	$ (261)	$ (30)	$ (293)	$ (55)
Income from discontinued operations	48,239	12,712	63,766	115,220
Noncontrolling interest - consolidated joint ventures	(120)	(110)	(187)	(187)
Amounts attributable to common shareholders or unitholders
Income from discontinued operations	$ 47,005	$ 12,306	$ 62,100	$ 112,348

XML

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Gain (loss) on property dispositions in discontinued operations	$ 41.2	$ 0.2	$ 50.1	$ (89.8)
Liberty Property Limited Partnership
Gain (loss) on property dispositions in discontinued operations	$ 41.2	$ 0.2	$ 50.1	$ (89.8)

XML

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

XML

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Document Period End Date	Jun. 30, 2019
OPERATING ACTIVITIES
Net income	$ 158,084	$ 164,615
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	88,708	88,459
Amortization of deferred financing costs	2,311	1,922
Expensed pursuit costs	208	383
Impairment charges - real estate assets	14,391	26,000
Loss on debt extinguishment	(7,618)	0
Equity in earnings of unconsolidated joint ventures	(9,190)	(14,192)
Gain on property dispositions	(77,981)	(142,514)
Share-based compensation	11,073	11,261
Development service fee accrual	0	62,256
Other	(8,179)	(2,069)
Changes in operating assets and liabilities:
Accounts receivable	1,534	2,446
Deferred rent receivable	(7,925)	(10,289)
Prepaid expenses and other assets	6,514	27,199
Accounts payable	(15,769)	(5,341)
Accrued interest	5,712	285
Other liabilities	(64,743)	(11,798)
Net cash provided by operating activities	112,366	198,623
INVESTING ACTIVITIES
Investment in properties – acquisitions	(156,870)	(211,335)
Investment in properties – other	(18,836)	(22,104)
Investments in and advances to unconsolidated joint ventures	(4,809)	(73,922)
Distributions from unconsolidated joint ventures	14,139	16,522
Net proceeds from disposition of properties/land	210,970	313,055
Investment in development in progress	(119,124)	(96,196)
Investment in land held for development	(22,966)	(105,827)
Payment of deferred leasing costs	(19,943)	(13,399)
Release of escrows and other	109,546	126,203
Net cash used in investing activities	(7,893)	(67,003)
FINANCING ACTIVITIES
Net proceeds from issuance of common shares	4,999	4,527
Share repurchases, including shares related to tax withholdings	(8,601)	(4,500)
Redemption of preferred units	(2,200)	0
Proceeds from unsecured notes	349,097	0
Repayments of mortgage loans including prepayment penalty	(49,915)	(30,377)
Proceeds from credit facility	122,505	698,163
Repayments on credit facility	(434,351)	(662,879)
Payment of deferred financing costs	(3,120)	0
Acquisition of noncontrolling interest	(18,513)	0
Distribution paid on common shares	(119,941)	(118,089)
Distributions to partners/noncontrolling interests	(3,401)	(3,296)
Net cash used in financing activities	(163,441)	(116,451)
Net (decrease) increase in cash, cash equivalents and restricted cash	(58,968)	15,169
Increase (decrease) in cash, cash equivalents and restricted cash related to foreign currency translation	1,577	(1,778)
Cash, cash equivalents and restricted cash at beginning of period	95,822	25,685
Cash, cash equivalents and restricted cash at end of period	38,431	39,076
Liberty Property Limited Partnership
OPERATING ACTIVITIES
Net income	158,084	164,615
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	88,708	88,459
Amortization of deferred financing costs	2,311	1,922
Expensed pursuit costs	208	383
Impairment charges - real estate assets	14,391	26,000
Loss on debt extinguishment	(7,618)	0
Equity in earnings of unconsolidated joint ventures	(9,190)	(14,192)
Gain on property dispositions	(77,981)	(142,514)
Share-based compensation	11,073	11,261
Development service fee accrual	0	62,256
Other	(8,179)	(2,069)
Changes in operating assets and liabilities:
Accounts receivable	1,534	2,446
Deferred rent receivable	(7,925)	(10,289)
Prepaid expenses and other assets	6,514	27,199
Accounts payable	(15,769)	(5,341)
Accrued interest	5,712	285
Other liabilities	(64,743)	(11,798)
Net cash provided by operating activities	112,366	198,623
INVESTING ACTIVITIES
Investment in properties – acquisitions	(156,870)	(211,335)
Investment in properties – other	(18,836)	(22,104)
Investments in and advances to unconsolidated joint ventures	(4,809)	(73,922)
Distributions from unconsolidated joint ventures	14,139	16,522
Net proceeds from disposition of properties/land	210,970	313,055
Investment in development in progress	(119,124)	(96,196)
Investment in land held for development	(22,966)	(105,827)
Payment of deferred leasing costs	(19,943)	(13,399)
Release of escrows and other	109,546	126,203
Net cash used in investing activities	(7,893)	(67,003)
FINANCING ACTIVITIES
Redemption of preferred units	(2,200)	0
Proceeds from unsecured notes	349,097	0
Repayments of mortgage loans including prepayment penalty	(49,915)	(30,377)
Proceeds from credit facility	122,505	698,163
Repayments on credit facility	(434,351)	(662,879)
Payment of deferred financing costs	(3,120)	0
Acquisition of noncontrolling interest	(18,513)
Capital contributions	4,999	4,527
Distributions to partners/noncontrolling interests	(131,943)	(125,885)
Net cash used in financing activities	(163,441)	(116,451)
Net (decrease) increase in cash, cash equivalents and restricted cash	(58,968)	15,169
Increase (decrease) in cash, cash equivalents and restricted cash related to foreign currency translation	1,577	(1,778)
Cash, cash equivalents and restricted cash at beginning of period	95,822	25,685
Cash, cash equivalents and restricted cash at end of period	$ 38,431	$ 39,076

XML

Organization and Basis of Presentation

6 Months Ended

Jun. 30, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Basis of Presentation

Organization and Basis of Presentation

Organization

Liberty Property Trust (the “Trust”) is a self-administered and self-managed Maryland real estate investment trust (a “REIT”). Substantially all of the Trust’s assets are owned directly or indirectly, and substantially all of the Trust’s operations are conducted directly or indirectly, by its subsidiary, Liberty Property Limited Partnership, a Pennsylvania limited partnership (the “Operating Partnership” and, together with the Trust and their consolidated subsidiaries, the “Company”). The Trust is the sole general partner and also a limited partner of the Operating Partnership, owning 97.7% of the common equity of the Operating Partnership at June 30, 2019. The Company owns and operates industrial properties in the United States nationally, as well as in the United Kingdom. The Company intends to divest its remaining office properties (other than its headquarters) over the next few years and focus its efforts and capital solely on its industrial platform. Unless otherwise indicated, the notes to the Consolidated Financial Statements apply to both the Trust and the Operating Partnership. The terms the “Company,” “we,” “our” and “us” mean the Trust and Operating Partnership collectively.

The Operating Partnership is a variable interest entity (“VIE”) of the Trust as the limited partners do not have substantive kick-out or participating rights. The Trust is the primary beneficiary of the Operating Partnership as it has the power to direct the activities of the Operating Partnership and the rights to absorb 97.7% of the net income of the Operating Partnership. The Trust has no significant assets or liabilities other than its investment in the Operating Partnership. As the Operating Partnership is already consolidated in the balance sheets of the Trust, the identification of this entity as a VIE has no impact on the consolidated financial statements of the Trust. In addition, the Company holds a 20% interest in Liberty/Comcast 1701 JFK Boulevard, LP which was determined to be a VIE. The Company determined that it is not the primary beneficiary as the Company and its third party partner share control of the joint venture. The Company's maximum exposure to loss is equal to its equity investment in the joint venture which was $74.8 million and $75.1 million as of June 30, 2019 and December 31, 2018, respectively.

Basis of Presentation

The accompanying unaudited consolidated financial statements of the Company have been prepared in accordance with United States generally accepted accounting principles (“U.S. GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements and should be read in conjunction with the consolidated financial statements and notes thereto included in the Annual Report on Form 10-K of the Company for the year ended December 31, 2018. In the opinion of management, all adjustments (consisting solely of normal recurring adjustments) necessary for a fair presentation of the financial statements for these interim periods have been included. The results of interim periods are not necessarily indicative of the results to be obtained for a full fiscal year.

Revenue Recognition

In May 2014, the Financial Accounting Standards Board (“FASB”) issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”), which supersedes nearly all existing revenue recognition guidance (except revenue in the scope of other accounting standards, including standards related to leasing). Subsequently, the FASB issued supplementary standards providing additional guidance and targeted improvements to ASU 2014-09 (collectively, the “Revenue Standards”). The Revenue Standards provide a unified model to determine how revenue is recognized. In accordance with the Revenue Standards, the Company performs the following steps: (i) identify the contract with the customer, (ii) identify the performance obligations within the contract, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations and (v) recognize revenue when (or as) a performance obligation is satisfied.

Upon adoption of the Revenue Standards, the Company evaluated each of its revenue streams: lease agreement revenue, development service fee revenue, deferred land sale revenue and gain or loss on sale of nonfinancial assets. The Company concluded that there are no revenue streams from its lease agreements that are covered by the Revenue Standards with the possible exception of non-lease components as further discussed below.

The Revenue Standards did not have an impact on the amount and timing of recognizing the Company's development service fee income. The Company recognizes development service fee income on a variable basis as a percentage of costs incurred on third party development contracts. Property development services, which are a single performance obligation, continue to be satisfied and recognized over time. The Company measures its progress toward completing the performance obligations under each arrangement. The measurement of the transfer of value to the customer for these services utilizes the input method (actual costs

incurred against anticipated project costs) since this method best depicts the actual transfer of value promised to the customer. Estimated expected losses on such contracts are accrued in the period in which they are determinable. The total amount of consideration to be received from these projects is assessed on a quarterly basis. Based on existing contracts, substantial completion is anticipated during 2019.

The Company recognizes revenues from improving land sites and selling the underlying land on behalf of its development partner to home builders in the United Kingdom. These agreements typically contain a pre-emption clause and a seller's call option. The Company recognizes revenue as the pre-emption period or seller's call option lapses utilizing the output method. There was $2.2 million and $5.9 million in revenue recognized for such contracts during the three and six months ended June 30, 2019, respectively.

The Revenue Standards did not have an impact on the gain or loss on sale of nonfinancial assets. The Revenue Standards require the Company to derecognize nonfinancial assets once it transfers control of a distinct nonfinancial asset or distinct in-substance nonfinancial asset. Additionally, when the Company transfers its controlling interest in a nonfinancial asset, but retains a noncontrolling ownership interest, the Company is required to measure any noncontrolling interest it receives or retains at fair value. The guidance requires companies to recognize a full gain or loss on the transaction. See Notes 5 and 7 for further discussion of sales of nonfinancial assets during the six months ended June 30, 2019.

Estimated gross revenue related to the remaining performance obligations under existing contracts (before allocation of related costs and expenses) as of June 30, 2019 that will be recognized as revenue in future periods was approximately $33.6 million, which is expected to be recognized in 2019 through 2021.

Recently Issued Accounting Standards

Leases

In February 2016, the FASB issued Accounting Standard Update 2016-02, Leases (“ASU 2016-02”). Additional guidance and targeted improvements to ASU 2016-02 were made through the issuances of supplementary ASUs in July 2018, December 2018 and March 2019 (collectively, the "New Lease Standard"). The New Lease Standard sets out the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e., lessees and lessors). It requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase of the leased asset by the lessee. This classification will determine whether the lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease. The New Lease Standard requires lessors to account for leases using an approach that is substantially equivalent to prior guidance for sales type leases, direct financing leases and operating leases.

The New Lease Standards limit capitalization of certain initial direct costs which were capitalizable under previous lease standards. Such costs, which were expensed during the three and six months ended June 30, 2019, were $0.3 million and $0.6 million, respectively.

The Company adopted the New Lease Standard on January 1, 2019 and applied it using a modified retrospective approach whereby the cumulative effect of the adoption was recognized on the adoption date and prior periods were not restated. There was no net cumulative effect adjustment to retained earnings as of January 1, 2019 as a result of this adoption.

The following practical expedients available for implementation were elected:

a. whether an expired or existing contract meets the definition of a lease

b. the lease classification at the adoption date for existing or expired leases

c. whether costs previously capitalized as initial direct costs would continue to be amortized

Additionally, the Company has elected the practical expedient not to recognize right of use assets and lease liabilities with a term of one year or less.

The Company's leases met the criteria in the New Lease Standard to not separate non-lease components from the related lease component; therefore, the accounting for these leases remained largely unchanged from the previous standard. The Company has elected to exclude sales and other similar taxes from the measurement of lease revenue and expense and the Company has excluded those costs paid directly by lessees to third parties.

Lessee Disclosure

As of June 30, 2019, the Company had a total of five properties subject to operating ground leases in Florida, New Jersey, Kentucky and the United Kingdom with a weighted average remaining term of 47 years. These leases have remaining terms of 11 to 110 years, expiration dates of June 2030 to June 2129, and renewal options of 25 to 48 years. The Company has included in the lease terms renewal options up to the useful life of the asset constructed on the land. Payments for certain properties are subject to increases at five year intervals based upon the agreed or appraised fair market value of the leased premises on the adjustment date

or the Consumer Price Index percentage increase since the base rent date. These future changes in payments are considered variable payments and do not impact the assessment of the asset or liability unless there is a significant event that triggers reassessment, such as an amendment with a change in the terms of the lease. The Company used discount rates in a range of 4.1% to 5.0% for a weighted average discount rate of 4.6%, which was derived from the Company's assessment of credit quality of the Company adjusted to reflect secured borrowing, estimated yield curves and long-term spread adjustments over appropriate tenures. The Company also leases office space from unrelated third-parties. The Company recognized lease expense of $482,000 and $950,000 during the three and six months ended June 30, 2019, respectively, of which $453,000 and $886,000, respectively, was paid in cash. The following schedule indicates the approximate future minimum lease payments for the ground and office leases as of June 30, 2019:

Year	Amount
	(in thousands)
2019 (remainder of year)	$	735
2020	1,373
2021	1,235
2022	1,136
2023	1,036
Thereafter	40,770
Total minimum payments	$	46,285
Imputed interest	(27,311		)
Amortization	(357		)
Lease liabilities	$	18,617
Deferred rent	(686		)
Right of use asset	$	17,931

As noted above, the Company adopted the New Lease Standard effective January 1, 2019. Since the Company has applied the provisions on a modified retrospective basis, the following represents approximate future minimum lease payments by year as of December 31, 2018, as applicable under ASC 840, Leases, prior to the adoption of the New Lease Standard.

Year	Amount
	(in thousands)
2019	$	1,512
2020	1,356
2021	1,205
2022	1,082
2023	981
Thereafter	40,799
	$	46,935

The Company recorded ground lease expense of $1.5 million for the year ended December 31, 2018.

Lessor Disclosures

The Company leases its operating properties to customers under agreements that are classified as operating leases. It manages residual risk through investing in properties that it believes will appreciate in value over time.

Substantially all of the Company's operating leases contain provisions for specified annual increases over the rents of the prior year. Rental income from operating leases is generally recognized on a straight-line basis over the lease term when the Company has determined that the collectibility of substantially all the lease payments is probable. If the Company determines that it is not probable that substantially all of the lease payments will be collected, the Company accounts for the revenue under the lease on a cash basis. Changes in the assessment of probability are accounted for on a cumulative basis as if the lease had always been accounted for based on the current determination of the likelihood of collection potentially resulting in increased volatility of rental revenue. Some of the Company's leases have options to extend, terminate or purchase the facilities, which are considered when determining the lease term. Tenant rights to purchase an underlying asset are typically at prevailing market rates at the time

of purchase. The Company does not include in measurement of lease receivables certain variable payments, including changes in an index, until the specific events that trigger the variable payments have occurred.

Generally operating leases require the tenants to reimburse the Company for property tax and other expenditures that are not considered components of the lease and therefore no consideration is allocated to them as they do not result in the transfer of a good or service to the tenants. The Company has determined that all of its leases qualify for the practical expedient to not separate the lease and non-lease components because (i) the lease components are operating leases and (ii) the timing and pattern of recognition of the non-lease components are the same as the lease components. The Company applies the New Lease Standard to the combined component. Income derived from the Company's leases is recorded in rental revenue in the Company's consolidated statements of comprehensive income. Certain tenants are obligated to pay directly their obligations under their leases for real estate taxes, insurance and certain other expenses. These obligations, which have been assumed by the tenants under the terms of their respective leases, are not reflected in the Company's consolidated financial statements. To the extent any tenant responsible for these obligations under the respective lease defaults on its lease or if it is deemed probable that the tenant will fail to pay for such costs, the Company would record a liability for such obligation.

The following details the rental income and variable lease income for the three and six months ended June 30, 2019 (in thousands):

	Three Months Ended		Six Months Ended
	June 30, 2019		June 30, 2019
Rental income - operating leases - continuing operations	$	123,544	$	244,617
Rental income - operating leases - discontinued operations	8,581		19,250
Variable lease income - operating leases - continuing operations	36,815		72,115
Variable lease income - operating leases - discontinued operations	2,737		5,845

The following amounts reflect the estimated contractual rents due to the Company for the remainder of terms of the Company's operating leases as of June 30, 2019:

	(in thousands)
Remainder of 2019	$	257,238
2020	494,928
2021	439,299
2022	369,584
2023	300,516
2024	242,833
Thereafter	863,024
Total	$	2,967,422

Other

In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities ("ASU 2017-12"). ASU 2017-12 is designed to better align a company’s financial reporting for hedging activities with the economic objectives of those activities. The Company adopted ASU 2017-12 on January 1, 2019 and it did not have a material impact on the Company's consolidated financial statements.

In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software: Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract ("ASU 2018-15"). ASU 2018-15 amends the definition of a hosting arrangement and requires a customer in a hosting arrangement that is a service contract to capitalize certain implementation costs as if the arrangement was an internal-use software project. ASU 2018-15 is effective for the Company beginning January 1, 2020. The Company does not anticipate the impact of ASU 2018-15 will have a material impact on the consolidated financial statements.

XML

Income per Common Share of the Trust

6 Months Ended

Jun. 30, 2019

Earnings Per Share [Abstract]

Income per Common Share of the Trust

Income per Common Share of the Trust

The following table sets forth the computation of basic and diluted income per common share of the Trust (in thousands except per share amounts):

	Three Months Ended					Three Months Ended
	June 30, 2019					June 30, 2018
	Income (Numerator)		Weighted Average Shares (Denominator)	Per Share		Income (Numerator)		Weighted Average Shares (Denominator)	Per Share
Income from continuing operations net of noncontrolling interest - basic	$	52,764	147,805	$	0.36	$	7,308	147,274	$	0.05
Dilutive shares for long-term compensation plans	—		863			—		1,059
Income from continuing operations net of noncontrolling interest - diluted	$	52,764	148,668	$	0.35	$	7,308	148,333	$	0.05
Discontinued operations net of noncontrolling interests - basic	$	47,005	147,805	$	0.32	$	12,306	147,274	$	0.08
Dilutive shares for long-term compensation plans	—		863			—		1,059
Discontinued operations net of noncontrolling interests - diluted	$	47,005	148,668	$	0.32	$	12,306	148,333	$	0.08
Net income available to common shareholders - basic	$	99,769	147,805	$	0.68	$	19,614	147,274	$	0.13
Dilutive shares for long-term compensation plans	—		863			—		1,059
Net income available to common shareholders - diluted	$	99,769	148,668	$	0.67	$	19,614	148,333	$	0.13
	Six Months Ended					Six Months Ended
	June 30, 2019					June 30, 2018
	Income (Numerator)		Weighted Average Shares (Denominator)	Per Share		Income (Numerator)		Weighted Average Shares (Denominator)	Per Share
Income from continuing operations net of noncontrolling interest - basic	$	92,000	147,706	$	0.62	$	47,447	147,184	$	0.33
Dilutive shares for long-term compensation plans	—		900			—		920
Income from continuing operations net of noncontrolling interest - diluted	$	92,000	148,606	$	0.62	$	47,447	148,104	$	0.32
Discontinued operations net of noncontrolling interests - basic	$	62,100	147,706	$	0.42	$	112,348	147,184	$	0.76
Dilutive shares for long-term compensation plans	—		900			—		920
Discontinued operations net of noncontrolling interests - diluted	$	62,100	148,606	$	0.42	$	112,348	148,104	$	0.76
Net income available to common shareholders - basic	$	154,100	147,706	$	1.04	$	159,795	147,184	$	1.09
Dilutive shares for long-term compensation plans	—		900			—		920
Net income available to common shareholders - diluted	$	154,100	148,606	$	1.04	$	159,795	148,104	$	1.08

Dilutive shares for long-term compensation plans represent the unvested common shares outstanding during the periods as well as the dilutive effect of outstanding options. There were no anti-dilutive options excluded from the computation of diluted income per common share for the three and six months ended June 30, 2019 or 2018.

During the three and six months ended June 30, 2019, 15,000 and 123,000 common shares, respectively, were issued upon the exercise of options. During the year ended December 31, 2018, 151,000 common shares were issued upon the exercise of options.

Share Repurchase

The Company’s Board of Trustees has authorized a share repurchase plan under which the Company may purchase up to $250 million of the Company’s outstanding common shares through September 28, 2019. Purchases made pursuant to the program may be made in either the open market or in privately negotiated transactions from time to time as permitted by securities laws and other legal requirements. There were no purchases under the plan during the three and six months ended June 30, 2019 or for the year ended December 31, 2018.

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Income per Common Unit of the Operating Partnership

6 Months Ended

Jun. 30, 2019

Earnings Per Unit, Basic and Diluted [Line Items]

Income per Common Share of the Trust

Income per Common Share of the Trust

The following table sets forth the computation of basic and diluted income per common share of the Trust (in thousands except per share amounts):

	Three Months Ended					Three Months Ended
	June 30, 2019					June 30, 2018
	Income (Numerator)		Weighted Average Shares (Denominator)	Per Share		Income (Numerator)		Weighted Average Shares (Denominator)	Per Share
Income from continuing operations net of noncontrolling interest - basic	$	52,764	147,805	$	0.36	$	7,308	147,274	$	0.05
Dilutive shares for long-term compensation plans	—		863			—		1,059
Income from continuing operations net of noncontrolling interest - diluted	$	52,764	148,668	$	0.35	$	7,308	148,333	$	0.05
Discontinued operations net of noncontrolling interests - basic	$	47,005	147,805	$	0.32	$	12,306	147,274	$	0.08
Dilutive shares for long-term compensation plans	—		863			—		1,059
Discontinued operations net of noncontrolling interests - diluted	$	47,005	148,668	$	0.32	$	12,306	148,333	$	0.08
Net income available to common shareholders - basic	$	99,769	147,805	$	0.68	$	19,614	147,274	$	0.13
Dilutive shares for long-term compensation plans	—		863			—		1,059
Net income available to common shareholders - diluted	$	99,769	148,668	$	0.67	$	19,614	148,333	$	0.13
	Six Months Ended					Six Months Ended
	June 30, 2019					June 30, 2018
	Income (Numerator)		Weighted Average Shares (Denominator)	Per Share		Income (Numerator)		Weighted Average Shares (Denominator)	Per Share
Income from continuing operations net of noncontrolling interest - basic	$	92,000	147,706	$	0.62	$	47,447	147,184	$	0.33
Dilutive shares for long-term compensation plans	—		900			—		920
Income from continuing operations net of noncontrolling interest - diluted	$	92,000	148,606	$	0.62	$	47,447	148,104	$	0.32
Discontinued operations net of noncontrolling interests - basic	$	62,100	147,706	$	0.42	$	112,348	147,184	$	0.76
Dilutive shares for long-term compensation plans	—		900			—		920
Discontinued operations net of noncontrolling interests - diluted	$	62,100	148,606	$	0.42	$	112,348	148,104	$	0.76
Net income available to common shareholders - basic	$	154,100	147,706	$	1.04	$	159,795	147,184	$	1.09
Dilutive shares for long-term compensation plans	—		900			—		920
Net income available to common shareholders - diluted	$	154,100	148,606	$	1.04	$	159,795	148,104	$	1.08

Dilutive shares for long-term compensation plans represent the unvested common shares outstanding during the periods as well as the dilutive effect of outstanding options. There were no anti-dilutive options excluded from the computation of diluted income per common share for the three and six months ended June 30, 2019 or 2018.

During the three and six months ended June 30, 2019, 15,000 and 123,000 common shares, respectively, were issued upon the exercise of options. During the year ended December 31, 2018, 151,000 common shares were issued upon the exercise of options.

Share Repurchase

The Company’s Board of Trustees has authorized a share repurchase plan under which the Company may purchase up to $250 million of the Company’s outstanding common shares through September 28, 2019. Purchases made pursuant to the program may be made in either the open market or in privately negotiated transactions from time to time as permitted by securities laws and other legal requirements. There were no purchases under the plan during the three and six months ended June 30, 2019 or for the year ended December 31, 2018.

Liberty Property Limited Partnership

Earnings Per Unit, Basic and Diluted [Line Items]

Income per Common Share of the Trust

Income per Common Unit of the Operating Partnership

The following table sets forth the computation of basic and diluted income per common unit of the Operating Partnership (in thousands, except per unit amounts):

	Three Months Ended						Three Months Ended
	June 30, 2019						June 30, 2018
	Income (Numerator)			Weighted Average Units (Denominator)	Per Unit		Income (Numerator)			Weighted Average Units (Denominator)	Per Unit
Income from continuing operations - net of noncontrolling interest - consolidated joint ventures	$	54,093					$	7,597
Less: Preferred unit distributions	(84		)				(118		)
Income from continuing operations available to common unitholders - basic	$	54,009		151,319	$	0.36	$	7,479		150,794	$	0.05
Dilutive units for long-term compensation plans	—			863			—			1,059
Income from continuing operations available to common unitholders - diluted	$	54,009		152,182	$	0.35	$	7,479		151,853	$	0.05
Income from discontinued operations net of noncontrolling interest consolidated joint venture - basic	$	48,119		151,319	$	0.32	$	12,602		150,794	$	0.08
Dilutive units for long-term compensation plans	—			863			—			1,059
Income from discontinued operations net of noncontrolling interest consolidated joint venture - basic	$	48,119		152,182	$	0.32	$	12,602		151,853	$	0.08
Income available to common unitholders - basic	$	102,128		151,319	$	0.68	$	20,081		150,794	$	0.13
Dilutive units for long-term compensation plans	—			863			—			1,059
Income available to common unitholders - diluted	$	102,128		152,182	$	0.67	$	20,081		151,853	$	0.13

	Six Months Ended						Six Months Ended
	June 30, 2019						June 30, 2018
	Income (Numerator)			Weighted Average Units (Denominator)	Per Unit		Income (Numerator)			Weighted Average Units (Denominator)	Per Unit
Net income - net of noncontrolling interest - consolidated joint ventures	$	94,338					$	48,804
Less: Preferred unit distributions	(168		)				(236		)
Income from continuing operations available to common unitholders - basic	94,170			151,223	$	0.62	48,568			150,704	$	0.33
Dilutive units for long-term compensation plans	—			900			—			920
Income from continuing operations available to common unitholders - diluted	$	94,170		152,123	$	0.62	$	48,568		151,624	$	0.32
Income from discontinued operations net of noncontrolling interest consolidated joint venture - basic	$	63,579		151,223	$	0.42	$	115,033		150,704	$	0.76
Dilutive units for long-term compensation plans	—			900			—			920
Income from discontinued operations net of noncontrolling interest consolidated joint venture - basic	$	63,579		152,123	$	0.42	$	115,033		151,624	$	0.76
Net income available to common unitholders - basic	$	157,749		151,223	$	1.04	$	163,601		150,704	$	1.09
Dilutive units for long-term compensation plans	—			900			—			920
Net income available to common unitholders - diluted	$	157,749		152,123	$	1.04	$	163,601		151,624	$	1.08

Dilutive units for long-term compensation plans represent the unvested common units outstanding during the periods as well as the dilutive effect of outstanding options. There were no anti-dilutive options excluded from the computation of diluted income per common unit for the three and six months ended June 30, 2019 or 2018.

During the three and six months ended June 30, 2019, 15,000 and 123,000 common units, respectively, were issued upon exercise of options. During the year ended December 31, 2018, 151,000 common units were issued upon the exercise of options.

Unit Repurchase

The Company’s Board of Trustees has authorized a share repurchase plan under which the Company may purchase up to $250 million of the Company’s outstanding common units through September 28, 2019. Purchases made pursuant to the program may be made in either the open market or in privately negotiated transactions from time to time as permitted by securities laws and other legal requirements. There were no purchases under the plan during the three and six months ended June 30, 2019 or for the year ended December 31, 2018.

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Accumulated Other Comprehensive Income

6 Months Ended

Jun. 30, 2019

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Accumulated Other Comprehensive Income

Accumulated Other Comprehensive Loss

The following table sets forth the components of Accumulated Other Comprehensive Loss (in thousands):

	As of and for the six months ended June 30,
	2019			2018
Foreign Currency Translation:
Beginning balance	$	(52,862	)	$	(38,701	)
Translation adjustment	(518		)	(6,206		)
Ending balance	(53,380		)	(44,907		)
Derivative Instruments:
Beginning balance	(3,550		)	150
Unrealized gain	(1,973		)	425
Reclassification adjustment (1)	3			62
Ending balance	(5,520		)	637
Total accumulated other comprehensive loss	(58,900		)	(44,270		)
Less: portion included in noncontrolling interest – operating partnership	1,226			887
Total accumulated other comprehensive loss included in shareholders' equity/owners' equity	$	(57,674	)	$	(43,383	)

(1)

Amounts reclassified out of Accumulated Other Comprehensive Loss/General & Limited Partner's Equity into contractual interest expense.

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Real Estate

6 Months Ended

Jun. 30, 2019

Property, Plant and Equipment [Abstract]

Real Estate

Real Estate

Information on the Operating Properties and land parcels the Company acquired during the three months and six months ended June 30, 2019 is as follows:

	Three Months Ended June 30, 2019						Six Months Ended June 30, 2019
	Number of Buildings	Acres of Developable Land		Leaseable Square Feet	Purchase Price (in thousands)		Number of Buildings	Acres of Developable Land	Leaseable Square Feet	Purchase Price (in thousands)
Dallas	—	—	—	—	$	—	2	—	509,733	$	44,400
Southern California	—	—		—	—		1	—	289,683	31,285
United Kingdom	—	—		—	—		—	25.0	—	2,658
Other:
Atlanta	—	—		—	—		—	154.7	—	5,000
New Jersey	1	—		218,000	26,500		3	—	488,254	78,275
	1	—		218,000	$	26,500	6	179.7	1,287,670	$	161,618

In the three months ended June 30, 2019, the Company purchased the noncontrolling interest of two consolidated joint ventures, comprising four buildings in the Company's Philadelphia reportable segment, for $17.8 million. In the six months ended June 30, 2019, the Company purchased the noncontrolling interest of three consolidated joint ventures in the following reportable segments: four buildings in Philadelphia, one building in New Jersey, one building in Dallas and one building in Southern California as well as 21.7 acres of land in Arizona, for $18.5 million.

Information on the Operating Properties and land parcels the Company sold during the three and six months ended June 30, 2019 is as follows:

	Three Months Ended June 30, 2019					Six Months Ended June 30, 2019
	Number of Buildings	Acres of Developable Land	Leaseable Square Feet	Gross Proceeds (in thousands)		Number of Buildings	Acres of Developable Land	Leaseable Square Feet	Gross Proceeds (in thousands)
Chicago/Minneapolis	—	11.3	—	$	2,865	—	11.3	—	$	2,865
Florida	—	—	—	—		3	—	150,751	23,400
Houston	—	4.0	—	1,505		—	4.0	—	1,505
Philadelphia	1	—	153,242	99,250		1	—	153,242	99,250
Southeastern PA	3	18.0	74,180	10,200		3	18.0	74,180	10,200
Other:
Arizona	—	8.8	—	11,500		—	8.8	—	11,500
New Jersey	—	—	—	—		—	0.8	—	4,000
DC Metro	—	—	—	—		1	—	146,472	61,750
	4	42.1	227,422	$	125,320	8	42.9	524,645	$	214,470

In connection with the sale of a building in the Philadelphia reportable segment in June 2019 the Company repaid a $35.9 million 4.84% mortgage loan due 2033 encumbering the property and, consequently, recognized a loss of $7.6 million on early extinguishment of debt, which is reported in discontinued operations.

In addition to the operating properties and land parcels sold as described above, the Company recognized a gain on sale of $2.0 million during the three and six months ended June 30, 2019 from the sale of non-depreciable assets in Camden, New Jersey located in the Company's Philadelphia reportable segment.

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Segment Information

6 Months Ended

Jun. 30, 2019

Segment Reporting [Abstract]

Segment Information

Segment Information

The Company owns and operates industrial properties nationally and owns and operates certain non-core office properties in a focused group of office markets. Additionally, the Company owns certain assets in the United Kingdom. At June 30, 2019, the Company's reportable segments were based on the Company's method of internal reporting and were as follows:

• Carolinas/Richmond;

• Chicago/Minneapolis;

• Cincinnati/Columbus/Indianapolis;

• Dallas

• Florida;

• Houston;

• Lehigh/Central PA;

• Philadelphia;

• Southern California; and

• United Kingdom.

Certain other segments are aggregated into an "Other" category which includes the reportable segments: Arizona; Atlanta; DC Metro; New Jersey; and Southeastern Pennsylvania.

Comparative prior periods have been restated to reflect current segment disclosures.

The Company evaluates the performance of its reportable segments based on net operating income. Net operating income includes operating revenue from external customers, real estate taxes, amortization of lease transaction costs and other operating expenses which relate directly to the management and operation of the assets within each reportable segment.

The Company's accounting policies for the segments are the same as those used in the Company's consolidated financial statements. There are no material inter-segment transactions.

The operating information by reportable segment is as follows (in thousands):

		Three Months Ended						Six Months Ended
		June 30, 2019			June 30, 2018			June 30, 2019			June 30, 2018
Revenue
	Carolinas/Richmond	$	20,666		$	19,513		$	40,752		$	39,306
	Chicago/Minneapolis	17,404			16,622			34,819			33,139
	Cincinnati/Columbus/Indianapolis	4,689			4,547			9,030			9,369
	Dallas	5,782			4,678			11,299			8,763
	Florida	16,064			15,862			32,347			31,270
	Houston	16,638			16,091			32,729			31,954
	Lehigh/Central PA	39,503			38,525			79,710			76,610
	Philadelphia	10,925			10,717			22,263			23,061
	Southern California	10,600			7,516			20,150			14,311
	United Kingdom	5,959			3,783			11,957			8,056
	Other	23,398			31,629			46,949			65,734
Segment-level revenue		171,628			169,483			342,005			341,573
Reconciliation to total revenue
	Development service fee income	978			19,824			1,842			46,176
	Discontinued operations	(11,318		)	(23,085		)	(25,095		)	(49,702		)
	Other	49			(291		)	(178		)	(389		)
Total revenue		$	161,337		$	165,931		$	318,574		$	337,658
Net operating income
	Carolinas/Richmond	$	14,836		$	13,930		$	29,281		$	27,820
	Chicago/Minneapolis	10,831			9,700			21,144			19,313
	Cincinnati/Columbus/Indianapolis	3,052			3,040			5,819			6,277
	Dallas	3,731			2,888			7,268			5,353
	Florida	10,752			10,528			22,161			21,096
	Houston	9,394			8,756			18,193			18,066
	Lehigh/Central PA	28,278			27,576			56,818			54,604
	Philadelphia	8,694			7,921			17,219			16,826
	Southern California	7,248			5,765			14,680			10,848
	United Kingdom	4,942			2,311			8,237			5,495
	Other	15,176			21,267			29,495			43,559
Net operating income		116,934			113,682			230,315			229,257
Reconciliation to income from continuing operations
	Interest expense (1)	(25,872		)	(23,202		)	(52,077		)	(46,661		)
	Development service fee income	978			19,824			1,842			46,176
	Development service fee expense	(847		)	(79,808		)	(1,680		)	(107,875		)
	Depreciation/amortization expense (1) (2)	(31,778		)	(31,932		)	(65,363		)	(65,340		)
	Impairment charges - real estate assets	—			(26,000		)	(99		)	(26,000		)
	Gain on property dispositions	5,462			48,584			5,957			52,742
	Equity in earnings of unconsolidated joint ventures	2,181			7,428			9,190			14,192
	General and administrative expense (1) (2)	(9,563		)	(8,302		)	(25,304		)	(23,054		)
	Leasing cost	(3,318		)	(2,767		)	(6,526		)	(5,579		)
	Other operating expenses (2)	(3,256		)	(1,577		)	(5,524		)	(4,079		)
	Discontinued operations excluding gain and impairment on property dispositions	580			(12,952		)	(6,034		)	(25,448		)
	Income taxes (1) (2)	(5		)	6			(5		)	18
	Other	2,600			5,194			9,626			11,046
Income from continuing operations		$	54,096		$	8,178		$	94,318		$	49,395

(1) Includes activity in discontinued operations.

(2) Excludes costs that are included in determining net operating income.

The Company's total assets by reportable segment as of June 30, 2019 and December 31, 2018 is as follows (in thousands):

	June 30, 2019		December 31, 2018
Carolinas/Richmond	$	524,408	$	525,041
Chicago/Minnesota	584,471		591,792
Cincinnati/Columbus/Indianapolis	133,848		131,400
Dallas	305,282		261,538
Florida	546,815		547,232
Houston	605,443		568,756
Lehigh/Central PA	1,205,634		1,210,220
Philadelphia	624,370		624,373
Southern California	713,262		660,688
United Kingdom	405,707		463,162
Other	1,165,094		1,153,518
Segment-level total assets	6,814,334		6,737,720
Corporate Other	67,925		196,674
Total assets	$	6,882,259	$	6,934,394

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Impairment and Disposal of Long-Lived Assets

6 Months Ended

Jun. 30, 2019

Property, Plant and Equipment [Abstract]

Impairment and Disposal of Long-Lived Assets

7: Impairment or Disposal of Long-Lived Assets

In 2017, the Company initiated a strategic shift whereby it adopted a plan to divest of its remaining suburban office properties. In the third quarter of 2018, the Company updated its strategy whereby it adopted a plan to divest of all of its remaining office properties. The Company determined that the strategic shift would have a major effect on its operations and financial results. As such, properties sold or those that meet the criteria to be classified as held for sale within the corporate strategy were classified within discontinued operations. Consistent with the held for sale criteria these properties are expected to be sold within one year. As the result of the classification within discontinued operations, the in-service assets and liabilities of this portfolio are required to be presented as held for sale for all prior periods presented in our Consolidated Balance Sheets. Operating results pertaining to these properties were reclassified to discontinued operations for all prior periods presented in our Consolidated Statements of Comprehensive Income.

The following table illustrates the number of sold or held for sale properties included in, or excluded from, discontinued operations:

	Held for sale as of June 30, 2019	Sold during the six months ended June 30, 2019	Sold during the year ended December 31, 2018	Total
Properties included in discontinued operations	14	8	37	59
Properties included in continuing operations	3	—	2	5
Properties sold or classified as held for sale	17	8	39	64

In addition, there were four properties comprising 86.0 acres included as held for sale as of June 30, 2019.

The properties held for sale with operating results in discontinued operations as of June 30, 2019 were located in the following reportable segments: two properties in Southeastern PA, one property in Chicago/Minneapolis, eight properties in Philadelphia one property in DC Metro and two in the United Kingdom.

A summary of the results of operations for the properties classified as discontinued operations is as follows (in thousands):

	Three Months Ended						Six Months Ended
	June 30, 2019			June 30, 2018			June 30, 2019			June 30, 2018
Revenues	$	11,318		$	23,085		$	25,095		$	49,702
Operating expenses	(3,452		)	(5,253		)	(7,787		)	(11,952		)
Depreciation and amortization	(62		)	(3,073		)	(2,129		)	(8,472		)
Impairment charges - real estate assets	(4,018		)	—			(14,292		)	—
Interest and other income (expense)	(39		)	(29		)	(60		)	(58		)
Income taxes	(261		)	(30		)	(293		)	(55		)
Loss on debt extinguishment	(7,618		)	—			(7,618		)	—
Interest expense	(466		)	(1,748		)	(1,174		)	(3,717		)
Gain (loss) on property dispositions	52,837			(240		)	72,024			89,772
Income from discontinued operations	48,239			12,712			63,766			115,220
Noncontrolling interest - operating partnership	(1,114		)	(296		)	(1,479		)	(2,685		)
Noncontrolling interest - consolidated joint venture	(120		)	(110		)	(187		)	(187		)
Income from discontinued operations available to common shareholders	$	47,005		$	12,306		$	62,100		$	112,348

Interest expense has been allocated to discontinued operations. The allocation of interest expense to discontinued operations was based on the ratio of net assets sold and held for sale included in discontinued operations to the sum of total net assets plus consolidated debt.

Capital expenditures on a cash basis related to properties within discontinued operations were $2.1 million and $3.5 million, respectively, for the three and six months ended June 30, 2019, and $11.2 million and $27.4 million, respectively, for the three and six months ended June 30, 2018.

Assets Held for Sale

As of June 30, 2019, 17 properties were classified as held for sale, of which 14 properties met the criteria to be classified within discontinued operations and three properties were classified within continuing operations. In addition, there were four properties comprising 86.0 acres included as held for sale as of June 30, 2019.

The following table illustrates aggregate balance sheet information for all held for sale properties (in thousands):

	June 30, 2019									December 31, 2018
	Included in Continuing Operations			Included in Discontinued Operations			Total			Included in Continuing Operations			Included in Discontinued Operations			Total
Land and land improvements	$	3,056		$	91,677		$	94,733		$	1,301		$	113,080		$	114,381
Buildings and improvements	25,119			253,295			278,414			5,638			384,737			390,375
Development in progress	—			10,269			10,269			—			9,597			9,597
Land held for development	21,120			—			21,120			26,253			—			26,253
Accumulated depreciation	(6,559		)	(36,946		)	(43,505		)	(1,546		)	(70,242		)	(71,788		)
Deferred financing and leasing costs, net	1,099			10,848			11,947			58			13,697			13,755
Other assets	1,153			12,595			13,748			164			19,470			19,634
Total assets held for sale	$	44,988		$	341,738		$	386,726		$	31,868		$	470,339		$	502,207
Total liabilities held for sale	$	2,941		$	16,092		$	19,033		$	141		$	20,990		$	21,131

Impairment Charges - Real Estate Assets

The Company recorded $4.0 million and $14.4 million of impairment charges during the three and six months ended June 30, 2019, respectively. These impairment charges were primarily related to an office building held for sale in the Company's DC Metro segment and is primarily included in discontinued operations in the Company's Consolidated Statements of Comprehensive Income.

The Company determined these impairments based on third party offer prices which are Level 2 according to the fair value hierarchy established in ASC 820.

The Company recorded a $26.0 million impairment charge during the three and six months ended June 30, 2018. This charge related to the Camden Waterfront project located in Camden, New Jersey and reported in the Company's Philadelphia reportable segment. The Company determined this impairment based on quoted offer prices on comparable properties, which is a Level 3 fair value calculation.

The Company has applied reasonable estimates and judgments in evaluating each of its properties and land held for development and has determined that there are no additional valuation adjustments necessary at June 30, 2019. Should external or internal circumstances change requiring the need to shorten the holding periods or adjust the estimated future cash flows of the Company’s assets, the Company could be required to record additional impairment charges in the future.

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Noncontrolling Interests of the Trust

6 Months Ended

Jun. 30, 2019

Stockholders' Equity Attributable to Noncontrolling Interest [Abstract]

Noncontrolling Interests of the Trust

Noncontrolling Interests of the Trust

Noncontrolling interests in the accompanying financial statements represent the interests of the common and preferred units in the Operating Partnership not held by the Trust. In addition, noncontrolling interests include third-party ownership interests in consolidated joint venture investments.

Common units

The common units of the Operating Partnership not held by the Trust outstanding as of June 30, 2019 have the same economic characteristics as common shares of the Trust. The 3.5 million outstanding common units of the Operating Partnership not held by the Trust share proportionately in the net income or loss and in any distributions of the Operating Partnership. The common units of the Operating Partnership not held by the Trust are redeemable at any time at the option of the holder. The Trust, as the sole general partner of the Operating Partnership, may at its option elect to settle the redemption in cash or through the exchange on a one-for-one basis with unregistered common shares of the Trust. The market value of the 3.5 million outstanding common units based on the closing price of the common shares of the Trust at June 30, 2019 was $175.8 million.

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Limited Partners' Equity and Noncontrolling Interest of the Operating Partnership

6 Months Ended

Jun. 30, 2019

Preferred Units [Line Items]

Limited Partners' Equity and Noncontrolling Interest of the Operating Partnership

Noncontrolling Interests of the Trust

Noncontrolling interests in the accompanying financial statements represent the interests of the common and preferred units in the Operating Partnership not held by the Trust. In addition, noncontrolling interests include third-party ownership interests in consolidated joint venture investments.

Common units

The common units of the Operating Partnership not held by the Trust outstanding as of June 30, 2019 have the same economic characteristics as common shares of the Trust. The 3.5 million outstanding common units of the Operating Partnership not held by the Trust share proportionately in the net income or loss and in any distributions of the Operating Partnership. The common units of the Operating Partnership not held by the Trust are redeemable at any time at the option of the holder. The Trust, as the sole general partner of the Operating Partnership, may at its option elect to settle the redemption in cash or through the exchange on a one-for-one basis with unregistered common shares of the Trust. The market value of the 3.5 million outstanding common units based on the closing price of the common shares of the Trust at June 30, 2019 was $175.8 million.

Liberty Property Limited Partnership

Preferred Units [Line Items]

Limited Partners' Equity and Noncontrolling Interest of the Operating Partnership

Limited Partners' Equity and Noncontrolling Interest of the Operating Partnership

Limited partners' equity in the accompanying financial statements represents the interests of the common and preferred units in the Operating Partnership not held by the Trust. The Operating Partnership's noncontrolling interest includes third-party ownership interests in consolidated joint venture investments.

Common units

The common units outstanding have the same economic characteristics as common shares of the Trust. The 3.5 million outstanding common units as of June 30, 2019 not held by the Trust are the limited partners' equity - common units held by persons and entities other than the Trust. The common units of the Operating Partnership not held by the Trust are redeemable at any time at the option of the holder. The Trust, as the sole general partner of the Operating Partnership, may at its option elect to settle the redemption in cash or through the exchange on a one-for-one basis with unregistered common shares of the Trust. The market value of the 3.5 million outstanding common units based on the closing price of the common shares of the Trust at June 30, 2019 was $175.8 million.

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Noncontrolling Interest - Operating Partnership/Limited Partnership/Limited Partners' Equity - Preferred Units

6 Months Ended

Jun. 30, 2019

Temporary Equity [Line Items]

Noncontrolling Interest - Operating Partnership/Limited Partnership/Limited Partners' Equity - Preferred Units

Noncontrolling Interest - Operating Partnership/Limited Partners' Equity - Preferred Units

As of June 30, 2019, the Company had outstanding the following cumulative preferred units of the Operating Partnership:

ISSUE	AMOUNT		UNITS	LIQUIDATION PREFERENCE		DIVIDEND RATE
	(in 000’s)
Series I-2	$	5,337	213	$	25	6.25	%

The preferred units are putable at the holder's option at any time and are callable at the Operating Partnership's option after a stated period of time for cash. During the six months ended June 30, 2019, 88,000 preferred units were redeemed for $2.2 million.

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Indebtedness

6 Months Ended

Jun. 30, 2019

Debt Disclosure [Abstract]

Indebtedness

Indebtedness

In January 2019, the Company issued $350 million of 4.375% senior unsecured notes due 2029. The net proceeds from this issuance were used to repay borrowings under the Company's unsecured credit facilities and for general corporate purposes.

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Disclosure of Fair Value of Financial Instruments

6 Months Ended

Jun. 30, 2019

Debt Instrument, Fair Value Disclosure [Abstract]

Disclosure of Fair Value of Financial Instruments

Fair Value of Financial Instruments

ASC 820, Fair Value Measurements and Disclosures, provides guidance on the fair value measurement of a financial asset or liability. Inputs used to develop fair value are classified in one of three categories: Level 1 inputs (quoted prices (unadjusted) in active markets for identical assets or liabilities), Level 2 inputs (inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly) and Level 3 inputs (unobservable inputs for the asset or liability).

The following disclosure of estimated fair value was determined by management using available market information and appropriate valuation methodologies. However, considerable judgment is necessary to interpret market data and develop estimated fair value. Accordingly, the following estimates are not necessarily indicative of the amounts the Company could have realized on disposition of the financial instruments at December 31, 2018 and June 30, 2019. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts.

The carrying value of cash and cash equivalents, restricted cash, accounts receivable, accounts payable, accrued interest, dividend and distributions payable and other liabilities are reasonable estimates of fair value because of the short-term nature of these instruments. The carrying value of the outstanding amounts under the Company's credit facilities is a reasonable estimate of fair value because interest rates float at a rate based on LIBOR.

The Company determines the fair value of its interest rate swaps by using the standard methodology of netting discounted future fixed cash payments with the discounted expected variable cash receipts. These variable cash receipts of interest rate swaps are based on expectations of future LIBOR interest rates (forward curves) estimated by observing market LIBOR interest rate curves. This is a Level 2 fair value calculation. Also, credit valuation adjustments are factored into the fair value calculations to account for potential nonperformance risk. These credit valuation adjustments were concluded to be not significant inputs for the fair value calculations for the periods presented. See Note 14 - Derivative Instruments.

The Company used a discounted cash flow model to determine the estimated fair value of its debt as of December 31, 2018 and June 30, 2019. This is a Level 3 fair value calculation. The inputs used in preparing the discounted cash flow model include actual maturity dates and scheduled cash flows as well as estimates for market value discount rates. The Company updates the discounted cash flow model on a quarterly basis to reflect any changes in the Company's debt holdings and changes to discount rate assumptions.

The following summarizes the fair value of the Company's mortgage loans and unsecured notes as of December 31, 2018 and June 30, 2019 (in thousands):

	Mortgage Loans				Unsecured Notes
	Carrying Value		Fair Value		Carrying Value		Fair Value
As of December 31, 2018	$	395,202	$	397,167	$	2,285,698	$	2,295,699
As of June 30, 2019	$	351,493	$	402,794	$	2,632,881	$	2,795,031

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Unconsolidated Joint Ventures

6 Months Ended

Jun. 30, 2019

Equity Method Investments and Joint Ventures [Abstract]

Unconsolidated Joint Ventures

Unconsolidated Joint Ventures

Liberty Property 18th & Arch LP and Liberty Property 18th & Arch Hotel, LP

On June 30, 2014, the Company entered into two joint ventures for the purpose of developing and owning the Comcast Technology Center (the “Project”) located in Philadelphia, Pennsylvania as part of a mixed-use development. The 60-story building includes 1.3 million square feet of leasable office space (the “Office”), which is substantially complete and fully occupied by Comcast Corporation, and a 219-room Four Seasons Hotel (the “Hotel”), which is nearing substantial completion and is scheduled to open to the public in August 2019. Costs for the development of the Project, exclusive of tenant-funded interior improvements, are anticipated to be approximately $968 million. As of June 30, 2019, the Company's investment in the project is $193.5 million and is reflected in investments in and advances to unconsolidated joint ventures in the Company's consolidated balance sheet. These joint ventures are part of the Company's Philadelphia reportable segment.

The two joint ventures engaged the Company as the developer of the Project pursuant to a Development Agreement by which the Company agreed, in consideration for a development fee, to be responsible for all aspects of the development of the Project and to guarantee the timely lien-free completion of construction of the Project as well as the payment, subject to certain exceptions, of any cost overruns incurred in the development of the Project. To mitigate its risk, the Company entered into guaranteed maximum price contracts (the "GMP Contracts") with a third party contractor (the "General Contractor") to construct the Project. The Company has been notified by the General Contractor that the General Contractor has incurred cost overruns comprised of amounts owed to third-party subcontractors and internal general condition costs of the General Contractor in connection with completing the Project in excess of the guaranteed maximum price payable to the General Contractor under the GMP Contracts, which guaranteed maximum price has been previously adjusted pursuant to accepted change orders. Notwithstanding the GMP Contracts, the General Contractor has generally refused to fund the cost overruns owed to third-party subcontractors, and the Company has funded, and may continue to fund, subcontractor cost overruns in compliance with its obligations under its development cost guarantee to the joint ventures. Accordingly, in periods prior to 2019, the Company accrued $69.3 million relating primarily to cost overruns that it estimated were probable of being funded to third-party subcontractors under its development cost guarantees to the joint ventures. As of June 30, 2019 and December 31, 2018, the Company's remaining accrual was $34.8 million and $67.3 million, respectively (including, in each case, estimated retainage of approximately $24 million payable to subcontractors), which accruals are included in other liabilities in the accompanying consolidated balance sheets and are reflective of amounts cumulatively funded by the Company as of those dates. The Company is accounting for the development of the Project on a variable basis as a percentage of costs incurred under the development contract. The Company recognized a loss of $60.0 million and $61.8 million for the three and six months ended June 30, 2018, respectively, in development service fee income, net of development service fee expense and other related expenses. There was no loss or gain recognized related to the Project during the three and six months ended June 30, 2019. The Company intends to pursue all remedies to recover from the General Contractor any amounts expended by the Company or the joint ventures in excess of their contractual obligations.

In addition to the costs to comply with the Company's obligations under its development cost guarantee, other claims related to the development of the Project have been asserted by the General Contractor and certain subcontractors. Should disputes with respect to these asserted claims proceed, the Company expects that it would assert claims against the General Contractor, both with respect to the claims as to which the above-described accrual has been made, as well as with respect to the additional claims described in this paragraph. There can be no assurances that amounts incurred, including as a result of such claims, will not exceed the above estimates. The Company is not able to reasonably estimate the amount of additional costs, if any, that it may incur as a result of such claims, and accordingly any potential exposure of the Company for such claims is not included within the accrual described above. Similarly, the Company is not able to reasonably estimate the amount, if any, that the Company may recover with respect to any claims it may assert against the General Contractor. If the Company were to incur additional expenses in connection with its development cost guarantee or in connection with such claims, such amounts would be accrued when they are determined to be probable of being incurred and are reasonably estimable, and could be material to the Company's results of operations in future periods. If the Company were to subsequently recover any of the cost overruns initially funded by the Company, whether pursuant to any such claims asserted by the Company or otherwise, such recoveries would be recorded when and if realized in future periods.

Liberty Washington, LP

During the three months ended June 30, 2019, the Company concluded that a property owned by this joint venture and held for sale had an indicator of impairment resulting from a decline in the Washington, DC market fundamentals. The joint venture recognized an impairment charge of $16.4 million for the three and six months ended June 30, 2019. The Company's share of this impairment charges was $4.1 million for the same periods. The impairment charge is related to the Company's DC Metro reportable segment and the Company's share is included in equity in earnings of unconsolidated joint ventures in the accompanying consolidated statements of comprehensive income. The Company determined these impairments based on estimated future discounted cash flows. This is a Level 3 fair value calculation.

Cambridge Medipark Ltd

During the three and six months ended June 30, 2019, Cambridge Medipark, Ltd (a joint venture in which the Company holds a 50% interest) recognized gains on the sale of land leasehold interests. The Company's share of these gains was $244,000 and $1.0 million for the three and six months ended June 30, 2019, respectively, compared to $1.7 million and $3.7 million, respectively, for the same periods in 2018.

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Derivative Instruments

6 Months Ended

Jun. 30, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments

Derivative Instruments

The Company borrows funds at a combination of fixed and variable rates. Borrowings under the Company's revolving credit facility and certain bank mortgage loans bear interest at variable rates. Other long-term debt typically bears interest at fixed rates. The Company's interest rate risk management objectives are to limit generally the impact of interest rate changes on earnings and cash flows and to lower the Company's overall borrowing costs. To achieve these objectives, from time to time, the Company enters into interest rate hedge contracts such as collars, swaps, caps and treasury lock agreements in order to mitigate our interest rate risk with respect to various debt instruments. The Company generally does not hold or issue these derivative contracts for trading or speculative purposes.

Interest rate swaps involve the receipt of variable-rate amounts from a counterparty in exchange for making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. The changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive loss and noncontrolling interest (for the Trust) and general partner's equity and limited partners’ equity - common units (for the Operating Partnership) and is subsequently reclassified into interest expense in the period that the hedged forecasted transaction affects earnings.

The Company determines the fair value of its interest rate swaps by netting discounted future fixed cash payments with the discounted expected variable cash receipts. These variable cash receipts of interest rate swaps are based on expectations of future LIBOR interest rates (forward curves) estimated by observing market LIBOR interest rate curves. This is a Level 2 fair value calculation. Also, credit valuation adjustments are factored into the fair value calculations to account for potential nonperformance risk. These credit valuation adjustments were concluded to be not significant inputs for the fair value calculations for the periods presented.

The Company holds an interest in two interest rate swap contracts (“Swaps”) that eliminate the impact of changes in interest rates on the payments required under variable rate mortgages. The Swaps had aggregate notional amounts of $65.7 million and $66.8 million at June 30, 2019 and December 31, 2018, respectively, and expire in 2020.

In addition, in late 2018, in anticipation of conducting the offering of senior notes described in Note 11, the Operating Partnership entered into two interest rate lock agreements tied to the U.S. treasury rate for an aggregate notional amount of $200 million. An interest rate lock is a tool used to manage interest-rate risk by effectively securing interest rates on federal government securities as of the agreement date. One agreement had a notional amount of $100 million and expired and was settled in 2018 for $2.4 million. The second agreement had a notional amount of $100 million and expired in 2019. It was settled for $3.3 million prior to consummation of such offering of senior notes. The interest rate lock agreements qualified as cash flow hedges with respect to the senior notes offering and, as such, the settlements of $5.7 million will be amortized into interest expense over the respective term of the notes.

The Company accounts for the changes in the fair value of a derivative in accumulated other comprehensive loss and subsequently reclassifies amounts to earnings over the term that the hedged transaction affects earnings.

The following table presents the location in the financial statements of the gains or losses recognized related to the Company’s cash flow hedges for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended					Six Months Ended
	June 30, 2019			June 30, 2018		June 30, 2019		June 30, 2018
Amount of gain related to the effective portion recognized in other comprehensive (loss) income	$	(147	)	$	148	$	412	$	550
Total Amount of Interest Expense Presented in the Consolidated Statements of Comprehensive Income	25,406			21,454		50,903		42,944

The following table presents the fair value of the Company’s derivative financial instruments as well as their classification on the accompanying consolidated balance sheets as of June 30, 2019 and December 31, 2018 (amounts in thousands):

	Derivatives
		Fair Value at:
	Balance Sheet Location	June 30, 2019		December 31, 2018
Derivatives designated as hedging instruments:
Interest Rate Swaps	Other Liabilities	$	567	$	677
Interest Rate Treasury Locks	Other Liabilities	—		3,972
Total		$	567	$	4,649

Amounts reported in accumulated other comprehensive income related to derivatives will be reclassified to interest expense as interest payments are made on the Company’s debt. The Company estimates that $0.5 million will be reclassified from accumulated other comprehensive loss as an increase to interest expense over the next 12 months.

The Company has agreements with its derivative counterparties that contain a provision whereby if the Company defaults on any of its indebtedness, including defaults where repayment of the indebtedness has not been accelerated by the lender, then the Company could also be declared in default on its derivative obligations. If the Company were to breach any of the contractual provisions of the derivative contracts, it would be required to settle its obligations under the agreements at their termination value including accrued interest, which totaled approximately $0.6 million as of June 30, 2019.

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Commitments and Contingencies

6 Months Ended

Jun. 30, 2019

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Environmental Matters

Substantially all of the Company's properties and land were subject to Phase I Environmental Assessments and when appropriate Phase II Environmental Assessments (collectively, the “Environmental Assessments”) obtained in contemplation of their acquisition by the Company or obtained by predecessor owners prior to the sale of the property or land to the Company. The Environmental Assessments did not reveal, nor is the Company aware of, any non-compliance with environmental laws, environmental liability or other environmental claim that the Company believes would likely have a material adverse effect on the Company.

Legal Matters

From time to time, the Company is a party to a variety of legal proceedings, claims and assessments arising in the normal course of business. As of June 30, 2019 there were no legal proceedings, claims or assessments that the Company expects to have a material adverse effect on the Company. However, see Note 13 for discussion of Comcast Technology Center.

Other

As of June 30, 2019, the Company had letter of credit obligations of $8.3 million.

As of June 30, 2019, the Company had 24 buildings under development. These buildings are expected to contain, when completed, a total of 6.8 million square feet of leasable space and represent an anticipated aggregate investment of $584.3 million. At June 30, 2019, development in progress totaled $416.0 million. In addition, as of June 30, 2019, the Company had invested $18.0 million in deferred leasing costs related to these development buildings.

The Company is currently developing three properties for its unconsolidated joint ventures which represent an anticipated aggregate investment by the joint ventures of $247.8 million.

As of June 30, 2019, the Company was committed to the following:

• $12.0 million in improvements on certain buildings and land parcels;

• $44.5 million in future land acquisitions which it expects to complete during the year ending December 31, 2019;

• up to $16.9 million of tenant improvements not yet completed; and

• infrastructure improvements of approximately $1.0 million.

The Company maintains cash and cash equivalents at financial institutions. The combined account balances at each institution typically exceed FDIC insurance coverage and, as a result, there is a concentration of credit risk related to amounts on deposit in excess of FDIC insurance coverage. The Company believes the risk is not significant.

Two unconsolidated joint ventures in which the Company holds an interest have engaged the Company as the developer of the Comcast Technology Center (the “Project") pursuant to a Development Agreement by which the Company agrees, in consideration for a development fee, to be responsible for all aspects of the development of the Project and to guarantee the timely lien-free completion of construction of the Project as well as the payment, subject to certain exceptions, of any cost overruns incurred in the development of the Project. See Note 13 for details on the commitments and contingencies associated with the Project.

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Supplemental Disclosure to Statements of Cash Flows

6 Months Ended

Jun. 30, 2019

Supplemental Cash Flow Information [Abstract]

Supplemental Disclosure to Statements of Cash Flows

Supplemental Disclosure to Consolidated Statements of Cash Flows

The following are supplemental disclosures to the consolidated statements of cash flows for the six months ended June 30, 2019 and 2018 (amounts in thousands):

	2019			2018
Write-off of fully depreciated/amortized property and deferred costs - properties included in continuing operations	$	1,110		$	14,609
Write-off of fully depreciated/amortized property and deferred costs - properties included in discontinued operations	$	—		$	1,886
Write-off of depreciated property and deferred costs due to sale - properties included in continuing operations	$	—		$	19,564
Write-off of depreciated property and deferred costs due to sale and related debt repayment - properties included in discontinued operations	$	28,221		$	96,936
Changes in accrued development capital expenditures - properties included in continuing operations	$	(651	)	$	10,063
Changes in accrued development capital expenditures - properties included in discontinued operations	$	—		$	(1,424	)
Unrealized (loss) gain on cash flow hedge	$	(1,970	)	$	487
Capitalized equity-based compensation	$	705		$	240

Amounts paid in cash for deferred leasing costs incurred in connection with signed leases with tenants are paid in conjunction with improving (acquiring) property, plant and equipment. Such costs are not contained within net real estate. However, they are integral to the completion of a tenant lease and ultimately are related to the improvement and thus the value of the Company’s property, plant and equipment. They are therefore included in investing activities in the Company’s consolidated statements of cash flows.

The following is a reconciliation of the Company's cash and cash equivalents and restricted cash at the beginning and end of the six months ended June 30, 2019 and 2018 (amounts in thousands):

	2019		2018
Cash and cash equivalents at beginning of period	$	84,923	$	11,882
Restricted cash at beginning of period	10,899		13,803
Cash and cash equivalents and restricted cash at beginning of period	$	95,822	$	25,685
Cash and cash equivalents at end of period	$	21,039	$	24,211
Restricted cash at end of period	17,392		14,865
Cash and cash equivalents and restricted cash at end of period	$	38,431	$	39,076

Restricted cash includes tenant security deposits and escrow funds that the Company maintains pursuant to certain mortgage loans. Restricted cash also includes the undistributed proceeds from the sale of land in Kent County, United Kingdom.

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Organization and Basis of Presentation (Policy)

6 Months Ended

Jun. 30, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Recently Issued Accounting Standards

Revenue Recognition

In May 2014, the Financial Accounting Standards Board (“FASB”) issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”), which supersedes nearly all existing revenue recognition guidance (except revenue in the scope of other accounting standards, including standards related to leasing). Subsequently, the FASB issued supplementary standards providing additional guidance and targeted improvements to ASU 2014-09 (collectively, the “Revenue Standards”). The Revenue Standards provide a unified model to determine how revenue is recognized. In accordance with the Revenue Standards, the Company performs the following steps: (i) identify the contract with the customer, (ii) identify the performance obligations within the contract, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations and (v) recognize revenue when (or as) a performance obligation is satisfied.

Upon adoption of the Revenue Standards, the Company evaluated each of its revenue streams: lease agreement revenue, development service fee revenue, deferred land sale revenue and gain or loss on sale of nonfinancial assets. The Company concluded that there are no revenue streams from its lease agreements that are covered by the Revenue Standards with the possible exception of non-lease components as further discussed below.

The Revenue Standards did not have an impact on the amount and timing of recognizing the Company's development service fee income. The Company recognizes development service fee income on a variable basis as a percentage of costs incurred on third party development contracts. Property development services, which are a single performance obligation, continue to be satisfied and recognized over time. The Company measures its progress toward completing the performance obligations under each arrangement. The measurement of the transfer of value to the customer for these services utilizes the input method (actual costs

incurred against anticipated project costs) since this method best depicts the actual transfer of value promised to the customer. Estimated expected losses on such contracts are accrued in the period in which they are determinable. The total amount of consideration to be received from these projects is assessed on a quarterly basis. Based on existing contracts, substantial completion is anticipated during 2019.

The Company recognizes revenues from improving land sites and selling the underlying land on behalf of its development partner to home builders in the United Kingdom. These agreements typically contain a pre-emption clause and a seller's call option. The Company recognizes revenue as the pre-emption period or seller's call option lapses utilizing the output method. There was $2.2 million and $5.9 million in revenue recognized for such contracts during the three and six months ended June 30, 2019, respectively.

The Revenue Standards did not have an impact on the gain or loss on sale of nonfinancial assets. The Revenue Standards require the Company to derecognize nonfinancial assets once it transfers control of a distinct nonfinancial asset or distinct in-substance nonfinancial asset. Additionally, when the Company transfers its controlling interest in a nonfinancial asset, but retains a noncontrolling ownership interest, the Company is required to measure any noncontrolling interest it receives or retains at fair value. The guidance requires companies to recognize a full gain or loss on the transaction. See Notes 5 and 7 for further discussion of sales of nonfinancial assets during the six months ended June 30, 2019.

Estimated gross revenue related to the remaining performance obligations under existing contracts (before allocation of related costs and expenses) as of June 30, 2019 that will be recognized as revenue in future periods was approximately $33.6 million, which is expected to be recognized in 2019 through 2021.

Recently Issued Accounting Standards

Leases

In February 2016, the FASB issued Accounting Standard Update 2016-02, Leases (“ASU 2016-02”). Additional guidance and targeted improvements to ASU 2016-02 were made through the issuances of supplementary ASUs in July 2018, December 2018 and March 2019 (collectively, the "New Lease Standard"). The New Lease Standard sets out the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e., lessees and lessors). It requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase of the leased asset by the lessee. This classification will determine whether the lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease. The New Lease Standard requires lessors to account for leases using an approach that is substantially equivalent to prior guidance for sales type leases, direct financing leases and operating leases.

The New Lease Standards limit capitalization of certain initial direct costs which were capitalizable under previous lease standards. Such costs, which were expensed during the three and six months ended June 30, 2019, were $0.3 million and $0.6 million, respectively.

The Company adopted the New Lease Standard on January 1, 2019 and applied it using a modified retrospective approach whereby the cumulative effect of the adoption was recognized on the adoption date and prior periods were not restated. There was no net cumulative effect adjustment to retained earnings as of January 1, 2019 as a result of this adoption.

The following practical expedients available for implementation were elected:

a. whether an expired or existing contract meets the definition of a lease

b. the lease classification at the adoption date for existing or expired leases

c. whether costs previously capitalized as initial direct costs would continue to be amortized

Additionally, the Company has elected the practical expedient not to recognize right of use assets and lease liabilities with a term of one year or less.

The Company's leases met the criteria in the New Lease Standard to not separate non-lease components from the related lease component; therefore, the accounting for these leases remained largely unchanged from the previous standard. The Company has elected to exclude sales and other similar taxes from the measurement of lease revenue and expense and the Company has excluded those costs paid directly by lessees to third parties.

Lessee Disclosure

As of June 30, 2019, the Company had a total of five properties subject to operating ground leases in Florida, New Jersey, Kentucky and the United Kingdom with a weighted average remaining term of 47 years. These leases have remaining terms of 11 to 110 years, expiration dates of June 2030 to June 2129, and renewal options of 25 to 48 years. The Company has included in the lease terms renewal options up to the useful life of the asset constructed on the land. Payments for certain properties are subject to increases at five year intervals based upon the agreed or appraised fair market value of the leased premises on the adjustment date

or the Consumer Price Index percentage increase since the base rent date. These future changes in payments are considered variable payments and do not impact the assessment of the asset or liability unless there is a significant event that triggers reassessment, such as an amendment with a change in the terms of the lease. The Company used discount rates in a range of 4.1% to 5.0% for a weighted average discount rate of 4.6%, which was derived from the Company's assessment of credit quality of the Company adjusted to reflect secured borrowing, estimated yield curves and long-term spread adjustments over appropriate tenures. The Company also leases office space from unrelated third-parties. The Company recognized lease expense of $482,000 and $950,000 during the three and six months ended June 30, 2019, respectively, of which $453,000 and $886,000, respectively, was paid in cash. The following schedule indicates the approximate future minimum lease payments for the ground and office leases as of June 30, 2019:

Year	Amount
	(in thousands)
2019 (remainder of year)	$	735
2020	1,373
2021	1,235
2022	1,136
2023	1,036
Thereafter	40,770
Total minimum payments	$	46,285
Imputed interest	(27,311		)
Amortization	(357		)
Lease liabilities	$	18,617
Deferred rent	(686		)
Right of use asset	$	17,931

As noted above, the Company adopted the New Lease Standard effective January 1, 2019. Since the Company has applied the provisions on a modified retrospective basis, the following represents approximate future minimum lease payments by year as of December 31, 2018, as applicable under ASC 840, Leases, prior to the adoption of the New Lease Standard.

Year	Amount
	(in thousands)
2019	$	1,512
2020	1,356
2021	1,205
2022	1,082
2023	981
Thereafter	40,799
	$	46,935

The Company recorded ground lease expense of $1.5 million for the year ended December 31, 2018.

Lessor Disclosures

The Company leases its operating properties to customers under agreements that are classified as operating leases. It manages residual risk through investing in properties that it believes will appreciate in value over time.

Substantially all of the Company's operating leases contain provisions for specified annual increases over the rents of the prior year. Rental income from operating leases is generally recognized on a straight-line basis over the lease term when the Company has determined that the collectibility of substantially all the lease payments is probable. If the Company determines that it is not probable that substantially all of the lease payments will be collected, the Company accounts for the revenue under the lease on a cash basis. Changes in the assessment of probability are accounted for on a cumulative basis as if the lease had always been accounted for based on the current determination of the likelihood of collection potentially resulting in increased volatility of rental revenue. Some of the Company's leases have options to extend, terminate or purchase the facilities, which are considered when determining the lease term. Tenant rights to purchase an underlying asset are typically at prevailing market rates at the time

of purchase. The Company does not include in measurement of lease receivables certain variable payments, including changes in an index, until the specific events that trigger the variable payments have occurred.

Generally operating leases require the tenants to reimburse the Company for property tax and other expenditures that are not considered components of the lease and therefore no consideration is allocated to them as they do not result in the transfer of a good or service to the tenants. The Company has determined that all of its leases qualify for the practical expedient to not separate the lease and non-lease components because (i) the lease components are operating leases and (ii) the timing and pattern of recognition of the non-lease components are the same as the lease components. The Company applies the New Lease Standard to the combined component. Income derived from the Company's leases is recorded in rental revenue in the Company's consolidated statements of comprehensive income. Certain tenants are obligated to pay directly their obligations under their leases for real estate taxes, insurance and certain other expenses. These obligations, which have been assumed by the tenants under the terms of their respective leases, are not reflected in the Company's consolidated financial statements. To the extent any tenant responsible for these obligations under the respective lease defaults on its lease or if it is deemed probable that the tenant will fail to pay for such costs, the Company would record a liability for such obligation.

The following details the rental income and variable lease income for the three and six months ended June 30, 2019 (in thousands):

	Three Months Ended		Six Months Ended
	June 30, 2019		June 30, 2019
Rental income - operating leases - continuing operations	$	123,544	$	244,617
Rental income - operating leases - discontinued operations	8,581		19,250
Variable lease income - operating leases - continuing operations	36,815		72,115
Variable lease income - operating leases - discontinued operations	2,737		5,845

The following amounts reflect the estimated contractual rents due to the Company for the remainder of terms of the Company's operating leases as of June 30, 2019:

	(in thousands)
Remainder of 2019	$	257,238
2020	494,928
2021	439,299
2022	369,584
2023	300,516
2024	242,833
Thereafter	863,024
Total	$	2,967,422

Other

In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities ("ASU 2017-12"). ASU 2017-12 is designed to better align a company’s financial reporting for hedging activities with the economic objectives of those activities. The Company adopted ASU 2017-12 on January 1, 2019 and it did not have a material impact on the Company's consolidated financial statements.

In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software: Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract ("ASU 2018-15"). ASU 2018-15 amends the definition of a hosting arrangement and requires a customer in a hosting arrangement that is a service contract to capitalize certain implementation costs as if the arrangement was an internal-use software project. ASU 2018-15 is effective for the Company beginning January 1, 2020. The Company does not anticipate the impact of ASU 2018-15 will have a material impact on the consolidated financial statements.

Segment Reporting

The Company evaluates the performance of its reportable segments based on net operating income. Net operating income includes operating revenue from external customers, real estate taxes, amortization of lease transaction costs and other operating expenses which relate directly to the management and operation of the assets within each reportable segment.

The Company's accounting policies for the segments are the same as those used in the Company's consolidated financial statements.

Discontinued Operations

The Company determined that the strategic shift would have a major effect on its operations and financial results. As such, properties sold or those that meet the criteria to be classified as held for sale within the corporate strategy were classified within discontinued operations. Consistent with the held for sale criteria these properties are expected to be sold within one year. As the result of the classification within discontinued operations, the in-service assets and liabilities of this portfolio are required to be presented as held for sale for all prior periods presented in our Consolidated Balance Sheets. Operating results pertaining to these properties were reclassified to discontinued operations for all prior periods presented in our Consolidated Statements of Comprehensive Income.

Fair Value of Financial Instruments

ASC 820, Fair Value Measurements and Disclosures, provides guidance on the fair value measurement of a financial asset or liability. Inputs used to develop fair value are classified in one of three categories: Level 1 inputs (quoted prices (unadjusted) in active markets for identical assets or liabilities), Level 2 inputs (inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly) and Level 3 inputs (unobservable inputs for the asset or liability).

The following disclosure of estimated fair value was determined by management using available market information and appropriate valuation methodologies. However, considerable judgment is necessary to interpret market data and develop estimated fair value. Accordingly, the following estimates are not necessarily indicative of the amounts the Company could have realized on disposition of the financial instruments at December 31, 2018 and June 30, 2019. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts.

The carrying value of cash and cash equivalents, restricted cash, accounts receivable, accounts payable, accrued interest, dividend and distributions payable and other liabilities are reasonable estimates of fair value because of the short-term nature of these instruments. The carrying value of the outstanding amounts under the Company's credit facilities is a reasonable estimate of fair value because interest rates float at a rate based on LIBOR.

The Company determines the fair value of its interest rate swaps by using the standard methodology of netting discounted future fixed cash payments with the discounted expected variable cash receipts. These variable cash receipts of interest rate swaps are based on expectations of future LIBOR interest rates (forward curves) estimated by observing market LIBOR interest rate curves. This is a Level 2 fair value calculation. Also, credit valuation adjustments are factored into the fair value calculations to account for potential nonperformance risk. These credit valuation adjustments were concluded to be not significant inputs for the fair value calculations for the periods presented. See Note 14 - Derivative Instruments.

The Company used a discounted cash flow model to determine the estimated fair value of its debt as of December 31, 2018 and June 30, 2019. This is a Level 3 fair value calculation. The inputs used in preparing the discounted cash flow model include actual maturity dates and scheduled cash flows as well as estimates for market value discount rates. The Company updates the discounted cash flow model on a quarterly basis to reflect any changes in the Company's debt holdings and changes to discount rate assumptions.

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Segment Information Segment Information (Policies)

6 Months Ended

Jun. 30, 2019

Segment Reporting [Abstract]

Segment Reporting

The Company evaluates the performance of its reportable segments based on net operating income. Net operating income includes operating revenue from external customers, real estate taxes, amortization of lease transaction costs and other operating expenses which relate directly to the management and operation of the assets within each reportable segment.

The Company's accounting policies for the segments are the same as those used in the Company's consolidated financial statements.

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Impairment and Disposal of Long-Lived Assets Discontinued Operations (Policies)	6 Months Ended
	Jun. 30, 2019
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	The Company determined that the strategic shift would have a major effect on its operations and financial results. As such, properties sold or those that meet the criteria to be classified as held for sale within the corporate strategy were classified within discontinued operations. Consistent with the held for sale criteria these properties are expected to be sold within one year. As the result of the classification within discontinued operations, the in-service assets and liabilities of this portfolio are required to be presented as held for sale for all prior periods presented in our Consolidated Balance Sheets. Operating results pertaining to these properties were reclassified to discontinued operations for all prior periods presented in our Consolidated Statements of Comprehensive Income.

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Disclosure of Fair Value of Financial Instruments Fair Value of Financial Instruments (Policies)

6 Months Ended

Jun. 30, 2019

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

ASC 820, Fair Value Measurements and Disclosures, provides guidance on the fair value measurement of a financial asset or liability. Inputs used to develop fair value are classified in one of three categories: Level 1 inputs (quoted prices (unadjusted) in active markets for identical assets or liabilities), Level 2 inputs (inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly) and Level 3 inputs (unobservable inputs for the asset or liability).

The following disclosure of estimated fair value was determined by management using available market information and appropriate valuation methodologies. However, considerable judgment is necessary to interpret market data and develop estimated fair value. Accordingly, the following estimates are not necessarily indicative of the amounts the Company could have realized on disposition of the financial instruments at December 31, 2018 and June 30, 2019. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts.

The carrying value of cash and cash equivalents, restricted cash, accounts receivable, accounts payable, accrued interest, dividend and distributions payable and other liabilities are reasonable estimates of fair value because of the short-term nature of these instruments. The carrying value of the outstanding amounts under the Company's credit facilities is a reasonable estimate of fair value because interest rates float at a rate based on LIBOR.

The Company determines the fair value of its interest rate swaps by using the standard methodology of netting discounted future fixed cash payments with the discounted expected variable cash receipts. These variable cash receipts of interest rate swaps are based on expectations of future LIBOR interest rates (forward curves) estimated by observing market LIBOR interest rate curves. This is a Level 2 fair value calculation. Also, credit valuation adjustments are factored into the fair value calculations to account for potential nonperformance risk. These credit valuation adjustments were concluded to be not significant inputs for the fair value calculations for the periods presented. See Note 14 - Derivative Instruments.

The Company used a discounted cash flow model to determine the estimated fair value of its debt as of December 31, 2018 and June 30, 2019. This is a Level 3 fair value calculation. The inputs used in preparing the discounted cash flow model include actual maturity dates and scheduled cash flows as well as estimates for market value discount rates. The Company updates the discounted cash flow model on a quarterly basis to reflect any changes in the Company's debt holdings and changes to discount rate assumptions.

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Derivative Instruments Derivative Instruments (Policies)

6 Months Ended

Jun. 30, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivatives, Policy [Policy Text Block]

The Company borrows funds at a combination of fixed and variable rates. Borrowings under the Company's revolving credit facility and certain bank mortgage loans bear interest at variable rates. Other long-term debt typically bears interest at fixed rates. The Company's interest rate risk management objectives are to limit generally the impact of interest rate changes on earnings and cash flows and to lower the Company's overall borrowing costs. To achieve these objectives, from time to time, the Company enters into interest rate hedge contracts such as collars, swaps, caps and treasury lock agreements in order to mitigate our interest rate risk with respect to various debt instruments. The Company generally does not hold or issue these derivative contracts for trading or speculative purposes.

Interest rate swaps involve the receipt of variable-rate amounts from a counterparty in exchange for making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. The changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive loss and noncontrolling interest (for the Trust) and general partner's equity and limited partners’ equity - common units (for the Operating Partnership) and is subsequently reclassified into interest expense in the period that the hedged forecasted transaction affects earnings.

The Company determines the fair value of its interest rate swaps by netting discounted future fixed cash payments with the discounted expected variable cash receipts. These variable cash receipts of interest rate swaps are based on expectations of future LIBOR interest rates (forward curves) estimated by observing market LIBOR interest rate curves. This is a Level 2 fair value calculation. Also, credit valuation adjustments are factored into the fair value calculations to account for potential nonperformance risk. These credit valuation adjustments were concluded to be not significant inputs for the fair value calculations for the periods presented.

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Organization and Basis of Presentation (Tables)

6 Months Ended

Jun. 30, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of future minimum rent payments

. The following schedule indicates the approximate future minimum lease payments for the ground and office leases as of June 30, 2019:

Year	Amount
	(in thousands)
2019 (remainder of year)	$	735
2020	1,373
2021	1,235
2022	1,136
2023	1,036
Thereafter	40,770
Total minimum payments	$	46,285
Imputed interest	(27,311		)
Amortization	(357		)
Lease liabilities	$	18,617
Deferred rent	(686		)
Right of use asset	$	17,931

Future minimum rental payments

Since the Company has applied the provisions on a modified retrospective basis, the following represents approximate future minimum lease payments by year as of December 31, 2018, as applicable under ASC 840, Leases, prior to the adoption of the New Lease Standard.

Year	Amount
	(in thousands)
2019	$	1,512
2020	1,356
2021	1,205
2022	1,082
2023	981
Thereafter	40,799
	$	46,935

Schedule of lease income

The following details the rental income and variable lease income for the three and six months ended June 30, 2019 (in thousands):

	Three Months Ended		Six Months Ended
	June 30, 2019		June 30, 2019
Rental income - operating leases - continuing operations	$	123,544	$	244,617
Rental income - operating leases - discontinued operations	8,581		19,250
Variable lease income - operating leases - continuing operations	36,815		72,115
Variable lease income - operating leases - discontinued operations	2,737		5,845

Schedule of lease payments receivable

The following amounts reflect the estimated contractual rents due to the Company for the remainder of terms of the Company's operating leases as of June 30, 2019:

	(in thousands)
Remainder of 2019	$	257,238
2020	494,928
2021	439,299
2022	369,584
2023	300,516
2024	242,833
Thereafter	863,024
Total	$	2,967,422

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Income per Common Share of the Trust (Tables)

6 Months Ended

Jun. 30, 2019

Earnings Per Share [Abstract]

Schedule of earnings per share

The following table sets forth the computation of basic and diluted income per common share of the Trust (in thousands except per share amounts):

	Three Months Ended					Three Months Ended
	June 30, 2019					June 30, 2018
	Income (Numerator)		Weighted Average Shares (Denominator)	Per Share		Income (Numerator)		Weighted Average Shares (Denominator)	Per Share
Income from continuing operations net of noncontrolling interest - basic	$	52,764	147,805	$	0.36	$	7,308	147,274	$	0.05
Dilutive shares for long-term compensation plans	—		863			—		1,059
Income from continuing operations net of noncontrolling interest - diluted	$	52,764	148,668	$	0.35	$	7,308	148,333	$	0.05
Discontinued operations net of noncontrolling interests - basic	$	47,005	147,805	$	0.32	$	12,306	147,274	$	0.08
Dilutive shares for long-term compensation plans	—		863			—		1,059
Discontinued operations net of noncontrolling interests - diluted	$	47,005	148,668	$	0.32	$	12,306	148,333	$	0.08
Net income available to common shareholders - basic	$	99,769	147,805	$	0.68	$	19,614	147,274	$	0.13
Dilutive shares for long-term compensation plans	—		863			—		1,059
Net income available to common shareholders - diluted	$	99,769	148,668	$	0.67	$	19,614	148,333	$	0.13
	Six Months Ended					Six Months Ended
	June 30, 2019					June 30, 2018
	Income (Numerator)		Weighted Average Shares (Denominator)	Per Share		Income (Numerator)		Weighted Average Shares (Denominator)	Per Share
Income from continuing operations net of noncontrolling interest - basic	$	92,000	147,706	$	0.62	$	47,447	147,184	$	0.33
Dilutive shares for long-term compensation plans	—		900			—		920
Income from continuing operations net of noncontrolling interest - diluted	$	92,000	148,606	$	0.62	$	47,447	148,104	$	0.32
Discontinued operations net of noncontrolling interests - basic	$	62,100	147,706	$	0.42	$	112,348	147,184	$	0.76
Dilutive shares for long-term compensation plans	—		900			—		920
Discontinued operations net of noncontrolling interests - diluted	$	62,100	148,606	$	0.42	$	112,348	148,104	$	0.76
Net income available to common shareholders - basic	$	154,100	147,706	$	1.04	$	159,795	147,184	$	1.09
Dilutive shares for long-term compensation plans	—		900			—		920
Net income available to common shareholders - diluted	$	154,100	148,606	$	1.04	$	159,795	148,104	$	1.08

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Income per Common Unit of the Operating Partnership (Tables)

6 Months Ended

Jun. 30, 2019

Earnings Per Unit, Basic and Diluted [Line Items]

Schedule of earnings per share

The following table sets forth the computation of basic and diluted income per common share of the Trust (in thousands except per share amounts):

	Three Months Ended					Three Months Ended
	June 30, 2019					June 30, 2018
	Income (Numerator)		Weighted Average Shares (Denominator)	Per Share		Income (Numerator)		Weighted Average Shares (Denominator)	Per Share
Income from continuing operations net of noncontrolling interest - basic	$	52,764	147,805	$	0.36	$	7,308	147,274	$	0.05
Dilutive shares for long-term compensation plans	—		863			—		1,059
Income from continuing operations net of noncontrolling interest - diluted	$	52,764	148,668	$	0.35	$	7,308	148,333	$	0.05
Discontinued operations net of noncontrolling interests - basic	$	47,005	147,805	$	0.32	$	12,306	147,274	$	0.08
Dilutive shares for long-term compensation plans	—		863			—		1,059
Discontinued operations net of noncontrolling interests - diluted	$	47,005	148,668	$	0.32	$	12,306	148,333	$	0.08
Net income available to common shareholders - basic	$	99,769	147,805	$	0.68	$	19,614	147,274	$	0.13
Dilutive shares for long-term compensation plans	—		863			—		1,059
Net income available to common shareholders - diluted	$	99,769	148,668	$	0.67	$	19,614	148,333	$	0.13
	Six Months Ended					Six Months Ended
	June 30, 2019					June 30, 2018
	Income (Numerator)		Weighted Average Shares (Denominator)	Per Share		Income (Numerator)		Weighted Average Shares (Denominator)	Per Share
Income from continuing operations net of noncontrolling interest - basic	$	92,000	147,706	$	0.62	$	47,447	147,184	$	0.33
Dilutive shares for long-term compensation plans	—		900			—		920
Income from continuing operations net of noncontrolling interest - diluted	$	92,000	148,606	$	0.62	$	47,447	148,104	$	0.32
Discontinued operations net of noncontrolling interests - basic	$	62,100	147,706	$	0.42	$	112,348	147,184	$	0.76
Dilutive shares for long-term compensation plans	—		900			—		920
Discontinued operations net of noncontrolling interests - diluted	$	62,100	148,606	$	0.42	$	112,348	148,104	$	0.76
Net income available to common shareholders - basic	$	154,100	147,706	$	1.04	$	159,795	147,184	$	1.09
Dilutive shares for long-term compensation plans	—		900			—		920
Net income available to common shareholders - diluted	$	154,100	148,606	$	1.04	$	159,795	148,104	$	1.08

Liberty Property Limited Partnership

Earnings Per Unit, Basic and Diluted [Line Items]

Schedule of earnings per share

The following table sets forth the computation of basic and diluted income per common unit of the Operating Partnership (in thousands, except per unit amounts):

	Three Months Ended						Three Months Ended
	June 30, 2019						June 30, 2018
	Income (Numerator)			Weighted Average Units (Denominator)	Per Unit		Income (Numerator)			Weighted Average Units (Denominator)	Per Unit
Income from continuing operations - net of noncontrolling interest - consolidated joint ventures	$	54,093					$	7,597
Less: Preferred unit distributions	(84		)				(118		)
Income from continuing operations available to common unitholders - basic	$	54,009		151,319	$	0.36	$	7,479		150,794	$	0.05
Dilutive units for long-term compensation plans	—			863			—			1,059
Income from continuing operations available to common unitholders - diluted	$	54,009		152,182	$	0.35	$	7,479		151,853	$	0.05
Income from discontinued operations net of noncontrolling interest consolidated joint venture - basic	$	48,119		151,319	$	0.32	$	12,602		150,794	$	0.08
Dilutive units for long-term compensation plans	—			863			—			1,059
Income from discontinued operations net of noncontrolling interest consolidated joint venture - basic	$	48,119		152,182	$	0.32	$	12,602		151,853	$	0.08
Income available to common unitholders - basic	$	102,128		151,319	$	0.68	$	20,081		150,794	$	0.13
Dilutive units for long-term compensation plans	—			863			—			1,059
Income available to common unitholders - diluted	$	102,128		152,182	$	0.67	$	20,081		151,853	$	0.13

	Six Months Ended						Six Months Ended
	June 30, 2019						June 30, 2018
	Income (Numerator)			Weighted Average Units (Denominator)	Per Unit		Income (Numerator)			Weighted Average Units (Denominator)	Per Unit
Net income - net of noncontrolling interest - consolidated joint ventures	$	94,338					$	48,804
Less: Preferred unit distributions	(168		)				(236		)
Income from continuing operations available to common unitholders - basic	94,170			151,223	$	0.62	48,568			150,704	$	0.33
Dilutive units for long-term compensation plans	—			900			—			920
Income from continuing operations available to common unitholders - diluted	$	94,170		152,123	$	0.62	$	48,568		151,624	$	0.32
Income from discontinued operations net of noncontrolling interest consolidated joint venture - basic	$	63,579		151,223	$	0.42	$	115,033		150,704	$	0.76
Dilutive units for long-term compensation plans	—			900			—			920
Income from discontinued operations net of noncontrolling interest consolidated joint venture - basic	$	63,579		152,123	$	0.42	$	115,033		151,624	$	0.76
Net income available to common unitholders - basic	$	157,749		151,223	$	1.04	$	163,601		150,704	$	1.09
Dilutive units for long-term compensation plans	—			900			—			920
Net income available to common unitholders - diluted	$	157,749		152,123	$	1.04	$	163,601		151,624	$	1.08

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Accumulated Other Comprehensive Income (Tables)

6 Months Ended

Jun. 30, 2019

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of accumulated other comprehensive income

The following table sets forth the components of Accumulated Other Comprehensive Loss (in thousands):

	As of and for the six months ended June 30,
	2019			2018
Foreign Currency Translation:
Beginning balance	$	(52,862	)	$	(38,701	)
Translation adjustment	(518		)	(6,206		)
Ending balance	(53,380		)	(44,907		)
Derivative Instruments:
Beginning balance	(3,550		)	150
Unrealized gain	(1,973		)	425
Reclassification adjustment (1)	3			62
Ending balance	(5,520		)	637
Total accumulated other comprehensive loss	(58,900		)	(44,270		)
Less: portion included in noncontrolling interest – operating partnership	1,226			887
Total accumulated other comprehensive loss included in shareholders' equity/owners' equity	$	(57,674	)	$	(43,383	)

(1)

Amounts reclassified out of Accumulated Other Comprehensive Loss/General & Limited Partner's Equity into contractual interest expense.

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Real Estate (Tables)

6 Months Ended

Jun. 30, 2019

Property, Plant and Equipment [Abstract]

Schedule of operating properties and land parcels

Information on the Operating Properties and land parcels the Company acquired during the three months and six months ended June 30, 2019 is as follows:

	Three Months Ended June 30, 2019						Six Months Ended June 30, 2019
	Number of Buildings	Acres of Developable Land		Leaseable Square Feet	Purchase Price (in thousands)		Number of Buildings	Acres of Developable Land	Leaseable Square Feet	Purchase Price (in thousands)
Dallas	—	—	—	—	$	—	2	—	509,733	$	44,400
Southern California	—	—		—	—		1	—	289,683	31,285
United Kingdom	—	—		—	—		—	25.0	—	2,658
Other:
Atlanta	—	—		—	—		—	154.7	—	5,000
New Jersey	1	—		218,000	26,500		3	—	488,254	78,275
	1	—		218,000	$	26,500	6	179.7	1,287,670	$	161,618

In the three months ended June 30, 2019, the Company purchased the noncontrolling interest of two consolidated joint ventures, comprising four buildings in the Company's Philadelphia reportable segment, for $17.8 million. In the six months ended June 30, 2019, the Company purchased the noncontrolling interest of three consolidated joint ventures in the following reportable segments: four buildings in Philadelphia, one building in New Jersey, one building in Dallas and one building in Southern California as well as 21.7 acres of land in Arizona, for $18.5 million.

Information on the Operating Properties and land parcels the Company sold during the three and six months ended June 30, 2019 is as follows:

	Three Months Ended June 30, 2019					Six Months Ended June 30, 2019
	Number of Buildings	Acres of Developable Land	Leaseable Square Feet	Gross Proceeds (in thousands)		Number of Buildings	Acres of Developable Land	Leaseable Square Feet	Gross Proceeds (in thousands)
Chicago/Minneapolis	—	11.3	—	$	2,865	—	11.3	—	$	2,865
Florida	—	—	—	—		3	—	150,751	23,400
Houston	—	4.0	—	1,505		—	4.0	—	1,505
Philadelphia	1	—	153,242	99,250		1	—	153,242	99,250
Southeastern PA	3	18.0	74,180	10,200		3	18.0	74,180	10,200
Other:
Arizona	—	8.8	—	11,500		—	8.8	—	11,500
New Jersey	—	—	—	—		—	0.8	—	4,000
DC Metro	—	—	—	—		1	—	146,472	61,750
	4	42.1	227,422	$	125,320	8	42.9	524,645	$	214,470

In connection with the sale of a building in the Philadelphia reportable segment in June 2019 the Company repaid a $35.9 million 4.84% mortgage loan due 2033 encumbering the property and, consequently, recognized a loss of $7.6 million on early extinguishment of debt, which is reported in discontinued operations.

In addition to the operating properties and land parcels sold as described above, the Company recognized a gain on sale of $2.0 million during the three and six months ended June 30, 2019 from the sale of non-depreciable assets in Camden, New Jersey located in the Company's Philadelphia reportable segment.

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Segment Information (Tables)

6 Months Ended

Jun. 30, 2019

Segment Reporting [Abstract]

Schedule of operating information by reportable segment

The operating information by reportable segment is as follows (in thousands):

		Three Months Ended						Six Months Ended
		June 30, 2019			June 30, 2018			June 30, 2019			June 30, 2018
Revenue
	Carolinas/Richmond	$	20,666		$	19,513		$	40,752		$	39,306
	Chicago/Minneapolis	17,404			16,622			34,819			33,139
	Cincinnati/Columbus/Indianapolis	4,689			4,547			9,030			9,369
	Dallas	5,782			4,678			11,299			8,763
	Florida	16,064			15,862			32,347			31,270
	Houston	16,638			16,091			32,729			31,954
	Lehigh/Central PA	39,503			38,525			79,710			76,610
	Philadelphia	10,925			10,717			22,263			23,061
	Southern California	10,600			7,516			20,150			14,311
	United Kingdom	5,959			3,783			11,957			8,056
	Other	23,398			31,629			46,949			65,734
Segment-level revenue		171,628			169,483			342,005			341,573
Reconciliation to total revenue
	Development service fee income	978			19,824			1,842			46,176
	Discontinued operations	(11,318		)	(23,085		)	(25,095		)	(49,702		)
	Other	49			(291		)	(178		)	(389		)
Total revenue		$	161,337		$	165,931		$	318,574		$	337,658
Net operating income
	Carolinas/Richmond	$	14,836		$	13,930		$	29,281		$	27,820
	Chicago/Minneapolis	10,831			9,700			21,144			19,313
	Cincinnati/Columbus/Indianapolis	3,052			3,040			5,819			6,277
	Dallas	3,731			2,888			7,268			5,353
	Florida	10,752			10,528			22,161			21,096
	Houston	9,394			8,756			18,193			18,066
	Lehigh/Central PA	28,278			27,576			56,818			54,604
	Philadelphia	8,694			7,921			17,219			16,826
	Southern California	7,248			5,765			14,680			10,848
	United Kingdom	4,942			2,311			8,237			5,495
	Other	15,176			21,267			29,495			43,559
Net operating income		116,934			113,682			230,315			229,257
Reconciliation to income from continuing operations
	Interest expense (1)	(25,872		)	(23,202		)	(52,077		)	(46,661		)
	Development service fee income	978			19,824			1,842			46,176
	Development service fee expense	(847		)	(79,808		)	(1,680		)	(107,875		)
	Depreciation/amortization expense (1) (2)	(31,778		)	(31,932		)	(65,363		)	(65,340		)
	Impairment charges - real estate assets	—			(26,000		)	(99		)	(26,000		)
	Gain on property dispositions	5,462			48,584			5,957			52,742
	Equity in earnings of unconsolidated joint ventures	2,181			7,428			9,190			14,192
	General and administrative expense (1) (2)	(9,563		)	(8,302		)	(25,304		)	(23,054		)
	Leasing cost	(3,318		)	(2,767		)	(6,526		)	(5,579		)
	Other operating expenses (2)	(3,256		)	(1,577		)	(5,524		)	(4,079		)
	Discontinued operations excluding gain and impairment on property dispositions	580			(12,952		)	(6,034		)	(25,448		)
	Income taxes (1) (2)	(5		)	6			(5		)	18
	Other	2,600			5,194			9,626			11,046
Income from continuing operations		$	54,096		$	8,178		$	94,318		$	49,395

(1) Includes activity in discontinued operations.

(2)

Excludes costs that are included in determining net operating income.

Schedule of total assets by reportable segments

The Company's total assets by reportable segment as of June 30, 2019 and December 31, 2018 is as follows (in thousands):

	June 30, 2019		December 31, 2018
Carolinas/Richmond	$	524,408	$	525,041
Chicago/Minnesota	584,471		591,792
Cincinnati/Columbus/Indianapolis	133,848		131,400
Dallas	305,282		261,538
Florida	546,815		547,232
Houston	605,443		568,756
Lehigh/Central PA	1,205,634		1,210,220
Philadelphia	624,370		624,373
Southern California	713,262		660,688
United Kingdom	405,707		463,162
Other	1,165,094		1,153,518
Segment-level total assets	6,814,334		6,737,720
Corporate Other	67,925		196,674
Total assets	$	6,882,259	$	6,934,394

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Impairment and Disposal of Long-Lived Assets Impairment and Disposal of Long-Lived Assets (Tables)

6 Months Ended

Jun. 30, 2019

Discontinued Operations and Disposal Groups [Abstract]

Schedule of disposal groups

The following table illustrates the number of sold or held for sale properties included in, or excluded from, discontinued operations:

	Held for sale as of June 30, 2019	Sold during the six months ended June 30, 2019	Sold during the year ended December 31, 2018	Total
Properties included in discontinued operations	14	8	37	59
Properties included in continuing operations	3	—	2	5
Properties sold or classified as held for sale	17	8	39	64

A summary of the results of operations for the properties classified as discontinued operations is as follows (in thousands):

	Three Months Ended						Six Months Ended
	June 30, 2019			June 30, 2018			June 30, 2019			June 30, 2018
Revenues	$	11,318		$	23,085		$	25,095		$	49,702
Operating expenses	(3,452		)	(5,253		)	(7,787		)	(11,952		)
Depreciation and amortization	(62		)	(3,073		)	(2,129		)	(8,472		)
Impairment charges - real estate assets	(4,018		)	—			(14,292		)	—
Interest and other income (expense)	(39		)	(29		)	(60		)	(58		)
Income taxes	(261		)	(30		)	(293		)	(55		)
Loss on debt extinguishment	(7,618		)	—			(7,618		)	—
Interest expense	(466		)	(1,748		)	(1,174		)	(3,717		)
Gain (loss) on property dispositions	52,837			(240		)	72,024			89,772
Income from discontinued operations	48,239			12,712			63,766			115,220
Noncontrolling interest - operating partnership	(1,114		)	(296		)	(1,479		)	(2,685		)
Noncontrolling interest - consolidated joint venture	(120		)	(110		)	(187		)	(187		)
Income from discontinued operations available to common shareholders	$	47,005		$	12,306		$	62,100		$	112,348

The following table illustrates aggregate balance sheet information for all held for sale properties (in thousands):

	June 30, 2019									December 31, 2018
	Included in Continuing Operations			Included in Discontinued Operations			Total			Included in Continuing Operations			Included in Discontinued Operations			Total
Land and land improvements	$	3,056		$	91,677		$	94,733		$	1,301		$	113,080		$	114,381
Buildings and improvements	25,119			253,295			278,414			5,638			384,737			390,375
Development in progress	—			10,269			10,269			—			9,597			9,597
Land held for development	21,120			—			21,120			26,253			—			26,253
Accumulated depreciation	(6,559		)	(36,946		)	(43,505		)	(1,546		)	(70,242		)	(71,788		)
Deferred financing and leasing costs, net	1,099			10,848			11,947			58			13,697			13,755
Other assets	1,153			12,595			13,748			164			19,470			19,634
Total assets held for sale	$	44,988		$	341,738		$	386,726		$	31,868		$	470,339		$	502,207
Total liabilities held for sale	$	2,941		$	16,092		$	19,033		$	141		$	20,990		$	21,131

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Noncontrolling Interest - Operating Partnership/Limited Partners' Equity - Preferred Units (Tables)

6 Months Ended

Jun. 30, 2019

Temporary Equity [Line Items]

Schedule of preferred units

As of June 30, 2019, the Company had outstanding the following cumulative preferred units of the Operating Partnership:

ISSUE	AMOUNT		UNITS	LIQUIDATION PREFERENCE		DIVIDEND RATE
	(in 000’s)
Series I-2	$	5,337	213	$	25	6.25	%

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Disclosure of Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2019

Debt Instrument, Fair Value Disclosure [Abstract]

Schedule of fair value

The following summarizes the fair value of the Company's mortgage loans and unsecured notes as of December 31, 2018 and June 30, 2019 (in thousands):

	Mortgage Loans				Unsecured Notes
	Carrying Value		Fair Value		Carrying Value		Fair Value
As of December 31, 2018	$	395,202	$	397,167	$	2,285,698	$	2,295,699
As of June 30, 2019	$	351,493	$	402,794	$	2,632,881	$	2,795,031

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Derivative Instruments (Tables)

6 Months Ended

Jun. 30, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of gains or losses recognized related to derivatives

The following table presents the location in the financial statements of the gains or losses recognized related to the Company’s cash flow hedges for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended					Six Months Ended
	June 30, 2019			June 30, 2018		June 30, 2019		June 30, 2018
Amount of gain related to the effective portion recognized in other comprehensive (loss) income	$	(147	)	$	148	$	412	$	550
Total Amount of Interest Expense Presented in the Consolidated Statements of Comprehensive Income	25,406			21,454		50,903		42,944

Schedule of derivative instruments, classification on the accompanying balance sheets

The following table presents the fair value of the Company’s derivative financial instruments as well as their classification on the accompanying consolidated balance sheets as of June 30, 2019 and December 31, 2018 (amounts in thousands):

	Derivatives
		Fair Value at:
	Balance Sheet Location	June 30, 2019		December 31, 2018
Derivatives designated as hedging instruments:
Interest Rate Swaps	Other Liabilities	$	567	$	677
Interest Rate Treasury Locks	Other Liabilities	—		3,972
Total		$	567	$	4,649

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Supplemental Disclosure to Statements of Cash Flows (Tables)

6 Months Ended

Jun. 30, 2019

Supplemental Cash Flow Information [Abstract]

Schedule of supplemental disclosure to statement of cash flows

The following is a reconciliation of the Company's cash and cash equivalents and restricted cash at the beginning and end of the six months ended June 30, 2019 and 2018 (amounts in thousands):

	2019		2018
Cash and cash equivalents at beginning of period	$	84,923	$	11,882
Restricted cash at beginning of period	10,899		13,803
Cash and cash equivalents and restricted cash at beginning of period	$	95,822	$	25,685
Cash and cash equivalents at end of period	$	21,039	$	24,211
Restricted cash at end of period	17,392		14,865
Cash and cash equivalents and restricted cash at end of period	$	38,431	$	39,076

The following are supplemental disclosures to the consolidated statements of cash flows for the six months ended June 30, 2019 and 2018 (amounts in thousands):

	2019			2018
Write-off of fully depreciated/amortized property and deferred costs - properties included in continuing operations	$	1,110		$	14,609
Write-off of fully depreciated/amortized property and deferred costs - properties included in discontinued operations	$	—		$	1,886
Write-off of depreciated property and deferred costs due to sale - properties included in continuing operations	$	—		$	19,564
Write-off of depreciated property and deferred costs due to sale and related debt repayment - properties included in discontinued operations	$	28,221		$	96,936
Changes in accrued development capital expenditures - properties included in continuing operations	$	(651	)	$	10,063
Changes in accrued development capital expenditures - properties included in discontinued operations	$	—		$	(1,424	)
Unrealized (loss) gain on cash flow hedge	$	(1,970	)	$	487
Capitalized equity-based compensation	$	705		$	240

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Organization and Basis of Presentation - Organization (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Ownership interest in operating partnership - Limited Partnership	97.70%
Liberty Comcast 1701 JFK Boulevard, LP
Variable Interest Entity [Line Items]
Ownership percentage of equity method investment	20.00%
Liberty Comcast 1701 JFK Boulevard, LP | Variable Interest Entity, Not Primary Beneficiary | Other Investments
Variable Interest Entity [Line Items]
Equity investment in joint venture	$ 74.8	$ 75.1

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Organization and Basis of Presentation - Basis of Presentation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue from contracts	$ 978	$ 19,824	$ 1,842	$ 46,176
Revenue from remaining performance obligation	33,600		33,600
United Kingdom
Disaggregation of Revenue [Line Items]
Revenue from contracts	$ 2,200		$ 5,900

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Organization and Basis of Presentation - Ground Leases (Details)	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2019 USD ($) properties	Jun. 30, 2019 USD ($) properties	Dec. 31, 2018 USD ($)
Lessee, Lease, Description [Line Items]
Number of properties subject to ground lease (in properties) | properties	5	5
Weighted average remaining lease term	47 years	47 years
Term of contract	11 years	11 years
Useful life increase interval		5 years
Weighted average discount rate	4.60%	4.60%
Operating Lease, Expense	$ 482,000	$ 950,000
Leasing expense			$ 1,500,000
Cash portion of lease expense	$ 453,000	$ 886,000
Minimum
Lessee, Lease, Description [Line Items]
Renewal term	25 years	25 years
Weighted average discount rate	4.10%	4.10%
Maximum
Lessee, Lease, Description [Line Items]
Term of contract	110 years	110 years
Renewal term	48 years	48 years
Weighted average discount rate	5.00%	5.00%
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Leasing expense	$ 300,000	$ 600,000

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Organization and Basis of Presentation - Future Minimum Lease Payments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Jun. 30, 2019
Ground Leases Disclosures [Abstract]
2019 (remainder of year)		$ 735
2020		1,373
2021		1,235
2022		1,136
2023		1,036
Thereafter		40,770
Total minimum payments		46,285
Imputed interest		(27,311)
Amortization		(357)
Lease liabilities	$ 0	18,617
Deferred rent		(686)
Right of use asset	0	17,931
Leases, Operating [Abstract]
2019	1,512
2020	1,356
2021	1,205
2022	1,082
2023	981
Thereafter	40,799
Future minimum payments due	46,935
Leasing expense	$ 1,500
Operating Leases Receivable
Remainder of 2019		257,238
2020		494,928
2021		439,299
2022		369,584
2023		300,516
2024		242,833
Thereafter		863,024
Total		$ 2,967,422

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Organization and Basis of Presentation Rental Income Lessor (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Continuing Operations
Lessor, Lease, Description [Line Items]
Rental income - operating leases	$ 123,544	$ 244,617
Variable lease income - operating leases	36,815	72,115
Discontinued operations
Lessor, Lease, Description [Line Items]
Rental income - operating leases	8,581	19,250
Variable lease income - operating leases	$ 2,737	$ 5,845

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Income per Common Share of the Trust (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share, Basic and Diluted [Line Items]
Document Period End Date			Jun. 30, 2019
Income (Numerator) [Abstract]
Income from continuing operations net of noncontrolling interest	$ 52,764	$ 7,308	$ 92,000	$ 47,447
Income from discontinued operations net of noncontrolling interest	47,005	12,306	62,100	112,348
Net income available to common shareholders	$ 99,769	$ 19,614	$ 154,100	$ 159,795
Weighted Average Shares (Denominator) [Abstract]
Income from continuing operations net of noncontrolling interest - basic, weighted average shares (in shares)	147,805	147,274	147,706	147,184
Dilutive shares for long-term compensation plans, weighted average shares (in shares)	863	1,059	900	920
Income from continuing operations net of noncontrolling interest - diluted, weighted average shares (in shares)	148,668	148,333	148,606	148,104
Common shares
Earnings Per Share, Basic [Abstract]
Income from continuing operations (in usd per share)	$ 0.36	$ 0.05	$ 0.62	$ 0.33
Income from discontinued operations (in usd per share)	0.32	0.08	0.42	0.76
Income per common share or unit - basic (in usd per share)	0.68	0.13	1.04	1.09
Earnings Per Share, Diluted [Abstract]
Income from continuing operations (in usd per share)	0.35	0.05	0.62	0.32
Income from discontinued operations (in usd per share)	0.32	0.08	0.42	0.76
Income per common share or unit - diluted (in usd per share)	$ 0.67	$ 0.13	$ 1.04	$ 1.08

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Income per Common Share of the Trust Income per Common Share of the Trust - Anti-dilutive Options (Details) - shares	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Stock Option
Antidilutive Options Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive options excluded from computation of earnings per share	0	0	0	0
Common shares | 2017 Share Repurchase Program
Antidilutive Options Excluded from Computation of Earnings Per Share [Line Items]
Stock repurchased in period (in shares)	0		0		0

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Income per Common Share of the Trust - Options Exercised (Details) - shares	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Stock Option | Common shares
Stock Option Exercises [Line Items]
Amount of options exercised in period	15,000	123,000	151,000

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Income per Common Share of the Trust - Share Repurchase (Details) - 2017 Share Repurchase Program - Common shares - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Equity, Class of Treasury Stock [Line Items]
Share repurchase program, authorized amount	$ 250	$ 250
Stock repurchased in period (in shares)	0	0	0

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Income per Common Unit of the Operating Partnership - Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income (Numerator) [Abstract]
Income from continuing operations net of noncontrolling interest	$ 52,764	$ 7,308	$ 92,000	$ 47,447
Income from discontinued operations	47,005	12,306	62,100	112,348
Net income available to common shareholders	$ 99,769	$ 19,614	$ 154,100	$ 159,795
Weighted Average Units (Denominator) [Abstract]
Income from continuing operations net of noncontrolling interest - basic, weighted average shares (in shares)	147,805	147,274	147,706	147,184
Dilutive units for long-term compensation plans	863	1,059	900	920
Income from continuing operations net of noncontrolling interest - diluted, weighted average shares (in shares)	148,668	148,333	148,606	148,104
Earnings Per Unit, Diluted [Abstract]
Document Period End Date			Jun. 30, 2019
Liberty Property Limited Partnership
Income (Numerator) [Abstract]
Income from continuing operations net of noncontrolling interest	$ 54,093	$ 7,597	$ 94,338	$ 48,804
Preferred unit distributions	(84)	(118)	(168)	(236)
Income from continuing operations available to common unitholders	54,009	7,479	94,170	48,568
Income from discontinued operations	48,119	12,602	63,579	115,033
Net income available to common shareholders	$ 102,128	$ 20,081	$ 157,749	$ 163,601
Weighted Average Units (Denominator) [Abstract]
Income from continuing operations net of noncontrolling interest - basic, weighted average shares (in shares)	151,319	150,794	151,223	150,704
Dilutive units for long-term compensation plans	863	1,059	900	920
Income from continuing operations net of noncontrolling interest - diluted, weighted average shares (in shares)	152,182	151,853	152,123	151,624
Liberty Property Limited Partnership | Common Units
Earnings Per Unit, Basic [Abstract]
Income from continuing operations (in usd per share)	$ 0.36	$ 0.05	$ 0.62	$ 0.33
Income from discontinued operations (in usd per share)	0.32	0.08	0.42	0.76
Income per common share or unit - basic (in usd per share)	0.68	0.13	1.04	1.09
Earnings Per Unit, Diluted [Abstract]
Income from continuing operations (in usd per share)	0.35	0.05	0.62	0.32
Income from discontinued operations (in usd per share)	0.32	0.08	0.42	0.76
Income per common share or unit - diluted (in usd per share)	$ 0.67	$ 0.13	$ 1.04	$ 1.08

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Income per Common Unit of the Operating Partnership - Anti-dilutive Options (Details) - shares	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Stock Option
Antidilutive Options Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive options excluded from computation of earnings per share	0	0	0	0
Liberty Property Limited Partnership | Stock Option
Antidilutive Options Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive options excluded from computation of earnings per share	0	0	0	0
Common Units | 2017 Share Repurchase Program | Liberty Property Limited Partnership
Antidilutive Options Excluded from Computation of Earnings Per Share [Line Items]
Stock repurchased in period (in shares)	0		0		0

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Income per Common Unit of the Operations Partnership - Options Exercised (Details) - shares	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Liberty Property Limited Partnership | Stock Option | Common Units
Stock Option Exercises [Line Items]
Amount of options exercised in period	15,000	123,000	151,000

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Income per Common Unit of the Operating Partnership Unit Repurchase (Details) - Liberty Property Limited Partnership - 2017 Share Repurchase Program - Common Units - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Equity, Class of Treasury Stock [Line Items]
Share repurchase program, authorized amount	$ 250	$ 250
Stock repurchased in period (in shares)	0	0	0

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Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 3,396,772	$ 3,148,366
Ending balance	3,417,364	3,197,225
Total accumulated other comprehensive loss	3,417,364	3,148,366	$ 3,417,364	$ 3,398,813	$ 3,396,772	$ 3,197,225	$ 3,248,288
Total accumulated other comprehensive loss included in shareholders' equity/owners' equity			3,355,248		3,329,861
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(52,862)	(38,701)
Unrealized income (loss)	(518)	(6,206)
Ending balance	(53,380)	(44,907)
Total accumulated other comprehensive loss	(52,862)	(38,701)	(53,380)		(52,862)	(44,907)
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(3,550)	150
Unrealized income (loss)	(1,973)	425
Reclassification adjustment	3	62
Ending balance	(5,520)	637
Total accumulated other comprehensive loss	(3,550)	150	(5,520)		(3,550)	637
AOCI Including Portion Attributable to Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Ending balance	(58,900)	(44,270)
Total accumulated other comprehensive loss	(58,900)	(44,270)	(58,900)			(44,270)
AOCI Attributable to Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Ending balance	1,226	887
Total accumulated other comprehensive loss	1,226	887	1,226			887
AOCI Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(55,243)	(37,797)
Ending balance	(57,674)	(43,383)
Total accumulated other comprehensive loss	$ (55,243)	$ (43,383)	(57,674)	$ (51,803)	$ (55,243)	(43,383)	$ (29,674)
Total accumulated other comprehensive loss included in shareholders' equity/owners' equity			$ (57,674)			$ (43,383)

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Real Estate (Details) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) a ft² bldg	Jun. 30, 2019 USD ($) a ft² bldg	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) a ft² bldg	Jun. 30, 2018 USD ($)
Property, Plant and Equipment [Line Items]
Loss on debt extinguishment				$ (7,618)	$ 0
Net proceeds from disposition of properties/land				210,970	313,055
Repayments of Secured Debt				49,915	30,377
Acquisition of noncontrolling interest		$ 17,757		18,513
Discontinued operations
Property, Plant and Equipment [Line Items]
Loss on debt extinguishment		$ (7,618)	$ 0	$ (7,618)	$ 0
2019 acquisitions [Member] | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	6	6		6
Leaseable Square Feet (in sqft) | ft²	1,287,670	1,287,670		1,287,670
2019 acquisitions [Member] | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	179.7	179.7		179.7
2019 acquisitions [Member] | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Purchase Price (in thousands)				$ 161,618
2019 acquisitions [Member] | Dallas | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	2	2		2
Leaseable Square Feet (in sqft) | ft²	509,733	509,733		509,733
2019 acquisitions [Member] | Dallas | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	0	0		0
2019 acquisitions [Member] | Dallas | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Purchase Price (in thousands)				$ 44,400
2019 acquisitions [Member] | Southern California | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	1	1		1
Leaseable Square Feet (in sqft) | ft²	289,683	289,683		289,683
2019 acquisitions [Member] | Southern California | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	0	0		0
2019 acquisitions [Member] | Southern California | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Purchase Price (in thousands)				$ 31,285
2019 acquisitions [Member] | United Kingdom | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	0	0		0
Leaseable Square Feet (in sqft) | ft²	0	0		0
2019 acquisitions [Member] | United Kingdom | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	25.0	25.0		25.0
2019 acquisitions [Member] | United Kingdom | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Purchase Price (in thousands)				$ 2,658
2019 acquisitions [Member] | Atlanta | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	0	0		0
Leaseable Square Feet (in sqft) | ft²	0	0		0
2019 acquisitions [Member] | Atlanta | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	154.7	154.7		154.7
2019 acquisitions [Member] | Atlanta | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Payments to Acquire Real Estate				$ 5,000
2019 acquisitions [Member] | New Jersey | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	3	3		3
Leaseable Square Feet (in sqft) | ft²	488,254	488,254		488,254
2019 acquisitions [Member] | New Jersey | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	0	0		0
2019 acquisitions [Member] | New Jersey | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Purchase Price (in thousands)				$ 78,275
2019 acquisitions current quarter [Member] | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	1	1		1
Leaseable Square Feet (in sqft) | ft²	218,000	218,000		218,000
2019 acquisitions current quarter [Member] | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	0	0		0
2019 acquisitions current quarter [Member] | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Purchase Price (in thousands)		$ 26,500
2019 acquisitions current quarter [Member] | Dallas | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	0	0		0
Leaseable Square Feet (in sqft) | ft²	0	0		0
2019 acquisitions current quarter [Member] | Dallas | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	0	0		0
2019 acquisitions current quarter [Member] | Dallas | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Purchase Price (in thousands)		$ 0
2019 acquisitions current quarter [Member] | Southern California | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	0	0		0
Leaseable Square Feet (in sqft) | ft²	0	0		0
2019 acquisitions current quarter [Member] | Southern California | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	0	0		0
2019 acquisitions current quarter [Member] | Southern California | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Purchase Price (in thousands)		$ 0
2019 acquisitions current quarter [Member] | United Kingdom | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	0	0		0
Leaseable Square Feet (in sqft) | ft²	0	0		0
2019 acquisitions current quarter [Member] | United Kingdom | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	0	0		0
2019 acquisitions current quarter [Member] | United Kingdom | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Purchase Price (in thousands)		$ 0
2019 acquisitions current quarter [Member] | Atlanta | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	0	0		0
Leaseable Square Feet (in sqft) | ft²	0	0		0
2019 acquisitions current quarter [Member] | Atlanta | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	0	0		0
2019 acquisitions current quarter [Member] | Atlanta | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Purchase Price (in thousands)		$ 0
2019 acquisitions current quarter [Member] | New Jersey | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	1	1		1
Leaseable Square Feet (in sqft) | ft²	218,000	218,000		218,000
2019 acquisitions current quarter [Member] | New Jersey | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	0	0		0
2019 acquisitions current quarter [Member] | New Jersey | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Purchase Price (in thousands)		$ 26,500
2019 acquisitions of noncontrolling interest current quarter | Philadelphia
Property, Plant and Equipment [Line Items]
Number of Consolidated Joint Ventures	2	2		2
2019 acquisitions of noncontrolling interest current quarter | Philadelphia | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	4	4		4
2019 acquisitions of noncontrolling interest current quarter | Philadelphia | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Purchase Price (in thousands)		$ 17,800
2019 acquisitions of noncontrolling interest
Property, Plant and Equipment [Line Items]
Number of Consolidated Joint Ventures	3	3		3
2019 acquisitions of noncontrolling interest | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Purchase Price (in thousands)				$ 18,500
2019 acquisitions of noncontrolling interest | Dallas | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	1	1		1
2019 acquisitions of noncontrolling interest | Philadelphia | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	4	4		4
2019 acquisitions of noncontrolling interest | Southern California | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	1	1		1
2019 acquisitions of noncontrolling interest | Arizona | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	21.7	21.7		21.7
2019 acquisitions of noncontrolling interest | New Jersey | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	1	1		1
2019 sales current quarter | Philadelphia
Property, Plant and Equipment [Line Items]
Repayments of Secured Debt	$ (35,900)
2019 sales current quarter | Philadelphia | Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Gain (Loss) on Sale of Interest in Projects		$ 2,000
2019 sales current quarter | Disposal Group, Not Discontinued Operations | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	4	4		4
Leaseable Square Feet (in sqft) | ft²	227,422	227,422		227,422
2019 sales current quarter | Disposal Group, Not Discontinued Operations | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	42.1	42.1		42.1
2019 sales current quarter | Disposal Group, Not Discontinued Operations | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Gross Proceeds (in thousands)		$ 125,320
2019 sales current quarter | Disposal Group, Not Discontinued Operations | Chicago/Minneapolis | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	0	0		0
Leaseable Square Feet (in sqft) | ft²	0	0		0
2019 sales current quarter | Disposal Group, Not Discontinued Operations | Chicago/Minneapolis | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	11.3	11.3		11.3
2019 sales current quarter | Disposal Group, Not Discontinued Operations | Chicago/Minneapolis | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Gross Proceeds (in thousands)		$ 2,865
2019 sales current quarter | Disposal Group, Not Discontinued Operations | Florida | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	0	0		0
Leaseable Square Feet (in sqft) | ft²	0	0		0
2019 sales current quarter | Disposal Group, Not Discontinued Operations | Florida | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	0	0		0
2019 sales current quarter | Disposal Group, Not Discontinued Operations | Florida | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Gross Proceeds (in thousands)		$ 0
2019 sales current quarter | Disposal Group, Not Discontinued Operations | Houston | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	0	0		0
Leaseable Square Feet (in sqft) | ft²	0	0		0
2019 sales current quarter | Disposal Group, Not Discontinued Operations | Houston | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	4.0	4.0		4.0
2019 sales current quarter | Disposal Group, Not Discontinued Operations | Houston | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Net proceeds from disposition of properties/land				$ 1,505
2019 sales current quarter | Disposal Group, Not Discontinued Operations | Philadelphia | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	1	1		1
Leaseable Square Feet (in sqft) | ft²	153,242	153,242		153,242
2019 sales current quarter | Disposal Group, Not Discontinued Operations | Philadelphia | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	0	0		0
2019 sales current quarter | Disposal Group, Not Discontinued Operations | Philadelphia | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Gross Proceeds (in thousands)		$ 99,250
2019 sales current quarter | Disposal Group, Not Discontinued Operations | Arizona | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	8.8	8.8		8.8
2019 sales current quarter | Disposal Group, Not Discontinued Operations | Southeastern PA | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	18.0	18.0		18.0
2019 sales current quarter | Disposal Group, Not Discontinued Operations | New Jersey | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	0	0		0
Leaseable Square Feet (in sqft) | ft²	0	0		0
2019 sales current quarter | Disposal Group, Not Discontinued Operations | New Jersey | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	0	0		0
2019 sales current quarter | Disposal Group, Not Discontinued Operations | New Jersey | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Gross Proceeds (in thousands)		$ 0
2019 sales current quarter | Disposal Group, Not Discontinued Operations | DC Metro | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	0	0		0
Leaseable Square Feet (in sqft) | ft²	0	0		0
2019 sales current quarter | Disposal Group, Not Discontinued Operations | DC Metro | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	0	0		0
2019 sales current quarter | Disposal Group, Not Discontinued Operations | DC Metro | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Gross Proceeds (in thousands)		$ 0
2019 sales current quarter | Discontinued operations | Philadelphia
Property, Plant and Equipment [Line Items]
Debt Instrument, Interest Rate During Period	4.84%
Loss on debt extinguishment	$ 7,600
2019 sales current quarter | Discontinued operations | Arizona | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	0	0		0
Leaseable Square Feet (in sqft) | ft²	0	0		0
2019 sales current quarter | Discontinued operations | Arizona | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Gross Proceeds (in thousands)		$ 11,500
2019 sales current quarter | Discontinued operations | Southeastern PA | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	3	3		3
Leaseable Square Feet (in sqft) | ft²	74,180	74,180		74,180
2019 sales current quarter | Discontinued operations | Southeastern PA | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Gross Proceeds (in thousands)		$ 10,200
2019 sales | Philadelphia | Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Gain (Loss) on Sale of Interest in Projects				$ 2,000
2019 sales | Disposal Group, Not Discontinued Operations | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	8	8		8
Leaseable Square Feet (in sqft) | ft²	524,645	524,645		524,645
2019 sales | Disposal Group, Not Discontinued Operations | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	42.9	42.9		42.9
2019 sales | Disposal Group, Not Discontinued Operations | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Gross Proceeds (in thousands)				$ 214,470
2019 sales | Disposal Group, Not Discontinued Operations | Chicago/Minneapolis | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	0	0		0
Leaseable Square Feet (in sqft) | ft²	0	0		0
2019 sales | Disposal Group, Not Discontinued Operations | Chicago/Minneapolis | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	11.3	11.3		11.3
2019 sales | Disposal Group, Not Discontinued Operations | Chicago/Minneapolis | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Gross Proceeds (in thousands)				$ 2,865
2019 sales | Disposal Group, Not Discontinued Operations | Florida | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	3	3		3
Leaseable Square Feet (in sqft) | ft²	150,751	150,751		150,751
2019 sales | Disposal Group, Not Discontinued Operations | Florida | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	0	0		0
2019 sales | Disposal Group, Not Discontinued Operations | Florida | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Net proceeds from disposition of properties/land				$ 23,400
2019 sales | Disposal Group, Not Discontinued Operations | Houston | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	0	0		0
Leaseable Square Feet (in sqft) | ft²	0	0		0
2019 sales | Disposal Group, Not Discontinued Operations | Houston | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	4.0	4.0		4.0
2019 sales | Disposal Group, Not Discontinued Operations | Houston | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Net proceeds from disposition of properties/land				$ 1,505
2019 sales | Disposal Group, Not Discontinued Operations | Philadelphia | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	1	1		1
Leaseable Square Feet (in sqft) | ft²	153,242	153,242		153,242
2019 sales | Disposal Group, Not Discontinued Operations | Philadelphia | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	0	0		0
2019 sales | Disposal Group, Not Discontinued Operations | Philadelphia | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Gross Proceeds (in thousands)				$ 99,250
2019 sales | Disposal Group, Not Discontinued Operations | Arizona | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	8.8	8.8		8.8
2019 sales | Disposal Group, Not Discontinued Operations | Southeastern PA | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	18.0	18.0		18.0
2019 sales | Disposal Group, Not Discontinued Operations | New Jersey | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	0.8	0.8		0.8
2019 sales | Disposal Group, Not Discontinued Operations | DC Metro | Acres of Developable Land
Property, Plant and Equipment [Line Items]
Acres of Developable Land (in acres) | a	0	0		0
2019 sales | Discontinued operations | Arizona | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	0	0		0
Leaseable Square Feet (in sqft) | ft²	0	0		0
2019 sales | Discontinued operations | Arizona | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Gross Proceeds (in thousands)				$ 11,500
2019 sales | Discontinued operations | Southeastern PA | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	3	3		3
Leaseable Square Feet (in sqft) | ft²	74,180	74,180		74,180
2019 sales | Discontinued operations | Southeastern PA | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Gross Proceeds (in thousands)				$ 10,200
2019 sales | Discontinued operations | New Jersey | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	0	0		0
Leaseable Square Feet (in sqft) | ft²	0	0		0
2019 sales | Discontinued operations | New Jersey | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Gross Proceeds (in thousands)				$ 4,000
2019 sales | Discontinued operations | DC Metro | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Number of buildings (in buildings) | bldg	1	1		1
Leaseable Square Feet (in sqft) | ft²	146,472	146,472		146,472
2019 sales | Discontinued operations | DC Metro | Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Gross Proceeds (in thousands)				$ 61,750

XML

Segment Information - Income Statement (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Revenue	$ 161,337,000	$ 165,931,000	$ 318,574,000	$ 337,658,000
Interest expense	(25,406,000)	(21,454,000)	(50,903,000)	(42,944,000)
Development service fee income	978,000	19,824,000	1,842,000	46,176,000
Development service fee expense	(847,000)	(79,808,000)	(1,680,000)	(107,875,000)
Depreciation and amortization expense	(43,032,000)	(40,076,000)	(86,430,000)	(79,582,000)
Impairment charges - real estate assets	0	(26,000,000)	(99,000)	(26,000,000)
Gain on property dispositions	5,462,000	48,584,000	5,957,000	52,742,000
Equity in earnings of unconsolidated joint ventures	2,181,000	7,428,000	9,190,000	14,192,000
General and administrative expense	(9,693,000)	(8,832,000)	(25,298,000)	(23,159,000)
Leasing cost	(3,318,000)	(2,767,000)	(6,526,000)	(5,579,000)
Other operating expense	(3,256,000)	(1,577,000)	(5,524,000)	(4,079,000)
Income taxes	261,000	(911,000)	(571,000)	(1,440,000)
Income from continuing operations	54,096,000	8,178,000	94,318,000	49,395,000
Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenue	0	0	0	0
Operating Segments
Segment Reporting Information [Line Items]
Revenue	171,628,000	169,483,000	342,005,000	341,573,000
Net operating income	116,934,000	113,682,000	230,315,000	229,257,000
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Revenue	49,000	(291,000)	(178,000)	(389,000)
Interest expense	(25,872,000)	(23,202,000)	(52,077,000)	(46,661,000)
Depreciation and amortization expense	(31,778,000)	(31,932,000)	(65,363,000)	(65,340,000)
Impairment charges - real estate assets	0	(26,000,000)	(99,000)	(26,000,000)
Equity in earnings of unconsolidated joint ventures	2,181,000	7,428,000	9,190,000	14,192,000
General and administrative expense	9,563,000	8,302,000	25,304,000	23,054,000
Leasing cost	(3,318,000)	(2,767,000)	(6,526,000)	(5,579,000)
Other operating expense	(3,256,000)	(1,577,000)	(5,524,000)	(4,079,000)
Discontinued operations excluding (loss) gain on property dispositions	580,000	(12,952,000)	(6,034,000)	(25,448,000)
Income taxes	(5,000)	(6,000)	5,000	(18,000)
Other	2,600,000	5,194,000	9,626,000	11,046,000
Development service fee income | Segment Reconciling Items
Segment Reporting Information [Line Items]
Revenue	978,000	19,824,000	1,842,000	46,176,000
Discontinued operations | Segment Reconciling Items
Segment Reporting Information [Line Items]
Revenue	(11,318,000)	(23,085,000)	(25,095,000)	(49,702,000)
Carolinas/Richmond | Operating Segments | North America
Segment Reporting Information [Line Items]
Revenue	20,666,000	19,513,000	40,752,000	39,306,000
Net operating income	14,836,000	13,930,000	29,281,000	27,820,000
Chicago/Minneapolis | Operating Segments | North America
Segment Reporting Information [Line Items]
Revenue	17,404,000	16,622,000	34,819,000	33,139,000
Net operating income	10,831,000	9,700,000	21,144,000	19,313,000
Cincinnati/Columbus/Indianapolis | Operating Segments | North America
Segment Reporting Information [Line Items]
Revenue	4,689,000	4,547,000	9,030,000	9,369,000
Net operating income	3,052,000	3,040,000	5,819,000	6,277,000
Dallas | Operating Segments | North America
Segment Reporting Information [Line Items]
Revenue	5,782,000	4,678,000	11,299,000	8,763,000
Net operating income	3,731,000	2,888,000	7,268,000	5,353,000
Florida | Operating Segments | North America
Segment Reporting Information [Line Items]
Revenue	16,064,000	15,862,000	32,347,000	31,270,000
Net operating income	10,752,000	10,528,000	22,161,000	21,096,000
Houston | Operating Segments | North America
Segment Reporting Information [Line Items]
Revenue	16,638,000	16,091,000	32,729,000	31,954,000
Net operating income	9,394,000	8,756,000	18,193,000	18,066,000
Lehigh/Central PA | Operating Segments | North America
Segment Reporting Information [Line Items]
Revenue	39,503,000	38,525,000	79,710,000	76,610,000
Net operating income	28,278,000	27,576,000	56,818,000	54,604,000
Philadelphia
Segment Reporting Information [Line Items]
Impairment charges - real estate assets		(26,000,000.0)		(26,000,000)
Philadelphia | Operating Segments | North America
Segment Reporting Information [Line Items]
Revenue	10,925,000	10,717,000	22,263,000	23,061,000
Net operating income	8,694,000	7,921,000	17,219,000	16,826,000
Southern California | Operating Segments | North America
Segment Reporting Information [Line Items]
Revenue	10,600,000	7,516,000	20,150,000	14,311,000
Net operating income	7,248,000	5,765,000	14,680,000	10,848,000
United Kingdom | Operating Segments | United Kingdom
Segment Reporting Information [Line Items]
Revenue	5,959,000	3,783,000	11,957,000	8,056,000
Net operating income	4,942,000	2,311,000	8,237,000	5,495,000
Other | Operating Segments
Segment Reporting Information [Line Items]
Revenue	23,398,000	31,629,000	46,949,000	65,734,000
Net operating income	$ 15,176,000	$ 21,267,000	$ 29,495,000	$ 43,559,000

XML

Segment Information - Total Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Document Period End Date	Jun. 30, 2019
Assets	$ 6,882,259	$ 6,934,394
Operating Segments
Segment Reporting Information [Line Items]
Assets	6,814,334	6,737,720
Operating Segments | Other
Segment Reporting Information [Line Items]
Assets	1,165,094	1,153,518
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Assets	67,925	196,674
North America | Operating Segments | Carolinas/Richmond
Segment Reporting Information [Line Items]
Assets	524,408	525,041
North America | Operating Segments | Chicago/Minneapolis
Segment Reporting Information [Line Items]
Assets	584,471	591,792
North America | Operating Segments | Cincinnati/Columbus/Indianapolis
Segment Reporting Information [Line Items]
Assets	133,848	131,400
North America | Operating Segments | Dallas
Segment Reporting Information [Line Items]
Assets	305,282	261,538
North America | Operating Segments | Florida
Segment Reporting Information [Line Items]
Assets	546,815	547,232
North America | Operating Segments | Houston
Segment Reporting Information [Line Items]
Assets	605,443	568,756
North America | Operating Segments | Lehigh/Central PA
Segment Reporting Information [Line Items]
Assets	1,205,634	1,210,220
North America | Operating Segments | Philadelphia
Segment Reporting Information [Line Items]
Assets	624,370	624,373
North America | Operating Segments | Southern California
Segment Reporting Information [Line Items]
Assets	713,262	660,688
United Kingdom | Operating Segments | United Kingdom
Segment Reporting Information [Line Items]
Assets	$ 405,707	$ 463,162

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Impairment and Disposal of Long-Lived Assets - Discontinued Operations (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) a	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) a	Jun. 30, 2018 USD ($)	Jun. 30, 2019 properties	Jun. 30, 2019 bldg	Dec. 31, 2018 bldg
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Income taxes	$ 261	$ (911)	$ (571)	$ (1,440)
Loss on debt extinguishment			(7,618)	0
Gain (loss) on property dispositions	41,200	200	50,100	(89,800)
Income from discontinued operations	48,239	12,712	63,766	115,220
Noncontrolling interest - consolidated joint ventures	(123)	(691)	(167)	(778)
Income from discontinued operations available to common shareholders	47,005	12,306	62,100	112,348
Discontinued operations
Discontined Operations Income Statement [Line Items]
Capital expenditures	2,100	11,200	3,500	27,400
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Revenues	11,318	23,085	25,095	49,702
Operating expenses	(3,452)	(5,253)	(7,787)	(11,952)
Depreciation and amortization	(62)	(3,073)	(2,129)	(8,472)
Impairment charges - real estate assets	(4,018)	0	(14,292)	0
Interest and other income (expense)	(39)	(29)	(60)	(58)
Income taxes	(261)	(30)	(293)	(55)
Loss on debt extinguishment	(7,618)	0	(7,618)	0
Interest expense	(466)	(1,748)	(1,174)	(3,717)
Gain (loss) on property dispositions	52,837	(240)	72,024	89,772
Income from discontinued operations	48,239	12,712	63,766	115,220
Noncontrolling interest - operating partnership	(1,114)	(296)	(1,479)	(2,685)
Noncontrolling interest - consolidated joint ventures	(120)	(110)	(187)	(187)
Income from discontinued operations available to common shareholders	$ 47,005	$ 12,306	$ 62,100	$ 112,348
Properties included in discontinued operations, held for sale
Discontined Operations Income Statement [Line Items]
Number of buildings (in buildings) | bldg						14
Properties included in discontinued operations, held for sale | Southeastern PA
Discontined Operations Income Statement [Line Items]
Number of buildings (in buildings) | bldg						2
Properties included in discontinued operations, held for sale | Chicago/Minneapolis
Discontined Operations Income Statement [Line Items]
Number of buildings (in buildings) | bldg						1
Properties included in discontinued operations, held for sale | Philadelphia
Discontined Operations Income Statement [Line Items]
Number of buildings (in buildings) | bldg						8
Properties included in discontinued operations, held for sale | DC Metro
Discontined Operations Income Statement [Line Items]
Number of buildings (in buildings) | bldg						1
Properties included in discontinued operations, held for sale | United Kingdom
Discontined Operations Income Statement [Line Items]
Number of buildings (in buildings) | bldg						2
Properties included in discontinued operations, sold
Discontined Operations Income Statement [Line Items]
Number of buildings (in buildings) | bldg						8	37
Properties included in discontinued operations, total
Discontined Operations Income Statement [Line Items]
Number of buildings (in buildings) | bldg						59
Properties included in continuing operations, held for sale
Discontined Operations Income Statement [Line Items]
Number of buildings (in buildings) | bldg						3
Properties included in continuing operations, sold
Discontined Operations Income Statement [Line Items]
Number of buildings (in buildings) | bldg						0	2
Properties included in continuing operations, total
Discontined Operations Income Statement [Line Items]
Number of buildings (in buildings) | bldg						5
Properties sold or classified as held for sale, held for sale
Discontined Operations Income Statement [Line Items]
Number of buildings (in buildings)					4	17
Acres of Developable Land (in acres) | a	86.0		86.0
Properties sold or classified as held for sale, sold
Discontined Operations Income Statement [Line Items]
Number of buildings (in buildings) | bldg						8	39
Properties sold or classified as held for sale, total
Discontined Operations Income Statement [Line Items]
Number of buildings (in buildings) | bldg						64

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Impairment and Disposal of Long-Lived Assets - Assets Held for Sale (Details) $ in Thousands	Jun. 30, 2019 USD ($)	Jun. 30, 2019 a	Jun. 30, 2019 properties	Jun. 30, 2019 bldg	Dec. 31, 2018 USD ($)
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract]
Total assets held for sale	$ 386,726				$ 502,207
Liabilities held for sale	19,033				21,131
Included in Continuing Operations
Balance Sheet Disclosures by Disposal Groups [Line Items]
Number of buildings (in buildings) | bldg				3
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract]
Land and land improvements	3,056				1,301
Buildings and improvements	25,119				5,638
Disposal Group, Including Discontinued Operation, Development in Progress	0				0
Land held for development	21,120				26,253
Accumulated depreciation	(6,559)				(1,546)
Deferred financing and leasing costs, net	1,099				58
Other assets	1,153				164
Total assets held for sale	44,988				31,868
Liabilities held for sale	2,941				141
Included in Discontinued Operations
Balance Sheet Disclosures by Disposal Groups [Line Items]
Number of buildings (in buildings) | bldg				14
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract]
Land and land improvements	91,677				113,080
Buildings and improvements	253,295				384,737
Disposal Group, Including Discontinued Operation, Development in Progress	10,269				9,597
Land held for development	0				0
Accumulated depreciation	(36,946)				(70,242)
Deferred financing and leasing costs, net	10,848				13,697
Other assets	12,595				19,470
Total assets held for sale	341,738				470,339
Liabilities held for sale	16,092				20,990
Total
Balance Sheet Disclosures by Disposal Groups [Line Items]
Acres of Developable Land (in acres) | a		86.0
Number of buildings (in buildings)			4	17
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract]
Land and land improvements	94,733				114,381
Buildings and improvements	278,414				390,375
Disposal Group, Including Discontinued Operation, Development in Progress	10,269				9,597
Land held for development	21,120				26,253
Accumulated depreciation	(43,505)				(71,788)
Deferred financing and leasing costs, net	11,947				13,755
Other assets	13,748				19,634
Total assets held for sale	386,726				502,207
Liabilities held for sale	$ 19,033				$ 21,131

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Impairment and Disposal of Long-Lived Assets - Impairment Charges - Real Estate Assets (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment charges - real estate assets	$ 0	$ 26,000,000	$ 99,000	$ 26,000,000
Valuation adjustment	0		0
DC Metro
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment charges - real estate assets	$ 4,000,000.0		$ 14,400,000
Philadelphia
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment charges - real estate assets		$ 26,000,000.0		$ 26,000,000

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Noncontrolling Interests of the Trust- Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Redeemable Noncontrolling Interest [Line Items]
Limited Partners' common units outstanding	3,513,049	3,520,205
Liberty Property Limited Partnership
Redeemable Noncontrolling Interest [Line Items]
Limited Partners' common units outstanding	3,513,049	3,520,205
Market value of common units based on closing price	$ 175.8

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Limited Partners' Equity and Noncontrolling Interest of the Operating Partnership (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Limited Partners' Capital Account [Line Items]
Limited Partners' common units outstanding	3,513,049	3,520,205
Liberty Property Limited Partnership
Limited Partners' Capital Account [Line Items]
Limited Partners' common units outstanding	3,513,049	3,520,205
Market value of common units based on closing price	$ 175.8

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Noncontrolling Interest - Operating Partnership/Limited Partners' Equity - Preferred Units (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Temporary Equity [Line Items]
AMOUNT	$ 5,337	$ 5,337	$ 7,537	$ 7,537	$ 7,537	$ 7,537
Preferred units redeemed (in shares)	88,000
Preferred units redeemed, value	$ 2,200
Series I-2
Temporary Equity [Line Items]
UNITS	213,483		301,483
LIQUIDATION PREFERENCE (in usd per share)	$ 25
DIVIDEND RATE	6.25%

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Indebtedness (Details) - 4.375% Senior Unsecured Notes	Jan. 31, 2019 USD ($)
Debt Instrument [Line Items]
Debt issued, face amount	$ 350,000,000
Debt instrument, stated percentage	4.375%

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Disclosure of Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage loans, net	$ 351,493	$ 395,202
Unsecured Debt	2,632,881	2,285,698
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage loans, net	351,493	395,202
Unsecured Debt	2,632,881	2,285,698
Long-term Debt [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage Loans | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	402,794	397,167
Long-term Debt [Member] | Fair Value, Inputs, Level 3 [Member] | Unsecured Notes | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 2,795,031	$ 2,295,699

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Unconsolidated Joint Ventures - Liberty Property 18th & Arch LP and Liberty Property 18th & Arch, Hotel, LP (Details) $ in Thousands, ft² in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) investment	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2014 ft² room investment story
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated joint ventures		$ 350,768		$ 350,981
Philadelphia | Liberty Property 18th & Arch
Schedule of Equity Method Investments [Line Items]
Number of equity method investments (in investments) | investment		2				2
Anticipated Aggregate Investment		$ 968,000
Investments in and advances to unconsolidated joint ventures		193,500
Philadelphia | Construction in Progress | Liberty Property 18th & Arch
Schedule of Equity Method Investments [Line Items]
Number of stories in a high-rise building (in stories) | story						60
Number of hotel rooms (in rooms) | room						219
Leaseable square feet (in sqft) | ft²						1.3
Other Liabilities | Philadelphia | Liberty Property 18th & Arch | Guarantee Obligations
Schedule of Equity Method Investments [Line Items]
Loss contingency accrual		34,800		$ 67,300	$ 69,300
Accounts Payable [Member] | Philadelphia | Liberty Property 18th & Arch | Guarantee Obligations
Schedule of Equity Method Investments [Line Items]
Retention Payable		24,000
Equity Method Investee | Liberty Property 18th & Arch | Philadelphia
Schedule of Equity Method Investments [Line Items]
Net operating income	$ (60,000)	$ 0	$ (61,800)

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Unconsolidated Joint Ventures - Cambridge Medipark Ltd (Details) - Cambridge Medipark Ltd - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2018
Schedule of Equity Method Investments [Line Items]
Ownership percentage of equity method investment	50.00%		50.00%		50.00%
Leaseholds and Leasehold Improvements | Other Income | Disposal Group, Not Discontinued Operations
Schedule of Equity Method Investments [Line Items]
Gain on sale of leasehold interests	$ 244,000	$ 1,700,000	$ 1,000,000.0	$ 3,700,000

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Unconsolidated Joint Ventures -Liberty Washington, LP (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Schedule of Equity Method Investments [Line Items]
Impairment charges - real estate assets	$ 0	$ 26,000	$ 99	$ 26,000
DC Metro
Schedule of Equity Method Investments [Line Items]
Impairment charges - real estate assets	4,000		14,400
DC Metro | Liberty Washington, LP [Member] | Discontinued operations
Schedule of Equity Method Investments [Line Items]
Impairment charges - real estate assets	16,400		16,400
DC Metro | Liberty Property Limited Partnership | Other Investments | Equity Method Investee | Liberty Washington, LP [Member]
Schedule of Equity Method Investments [Line Items]
Impairment charges - real estate assets	$ 4,100		$ 4,100

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Derivative Instruments (Details) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 31, 2019 USD ($)	Jun. 30, 2019 USD ($) contract	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) contract	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($) contract
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense		$ 25,406	$ 21,454	$ 50,903	$ 42,944
Interest Rate Derivatives [Abstract]
Number of interest rate swaps | contract		2		2
Fair value		$ 567		$ 567		$ 4,649
Reclassification during next 12 months		500		500
Termination value		600		600
Interest Rate Swap
Interest Rate Derivatives [Abstract]
Aggregate notional amount		65,700		65,700		$ 66,800
Interest Rate Swap | Other Comprehensive Income (Loss) | Designated as Hedging Instrument | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain related to the effective portion recognized in other comprehensive (loss) income		(147)	$ 148	412	$ 550
Interest Rate Lock Commitments
Interest Rate Derivatives [Abstract]
Number of interest rate swaps | contract						2
Aggregate notional amount						$ 200,000
Gain (loss) on contract termination	$ 5,700
Interest Rate Lock Agreement A
Interest Rate Derivatives [Abstract]
Aggregate notional amount						100,000
Derivative, gain on derivative						$ 2,400
Number of derivative instruments expired | contract						1
Interest Rate Lock Agreement B
Interest Rate Derivatives [Abstract]
Aggregate notional amount	100,000
Derivative, gain on derivative	$ 3,300
Other Liabilities | Interest Rate Swap
Interest Rate Derivatives [Abstract]
Fair value		567		567		$ 677
Other Liabilities | Interest Rate Lock Commitments
Interest Rate Derivatives [Abstract]
Fair value		$ 0		$ 0		$ 3,972

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Commitments and Contingencies - Legal Matters (Details)	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Number of legal claims	0

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Commitments and Contingencies - Other (Details) $ in Thousands, ft² in Millions	Jun. 30, 2019 USD ($) ft² properties bldg investment	Dec. 31, 2018 USD ($)	Jun. 30, 2014 ft² investment
Loss Contingencies [Line Items]
Letters of credit outstanding	$ 8,300
Development in progress	416,035	$ 462,572
Acres of developable land | Land Purchases
Loss Contingencies [Line Items]
Remaining amount committed to future acquisitions	44,500
Supply Commitment | Leasehold Improvements
Loss Contingencies [Line Items]
Remaining maximum amount committed for tenant improvements	$ 16,900
Supply Commitment | Construction in Progress
Loss Contingencies [Line Items]
Leaseable square feet (in sqft) | ft²	6.8
Number of buildings (in buildings) | bldg	24
Total anticipated development cost	$ 584,300
Development in progress	416,000
Deferred leasing costs in development	18,000
Remaining amount committed or obligated to pay	$ 1,000
Supply Commitment | Construction in Progress | Equity Method Investments
Loss Contingencies [Line Items]
Number of buildings (in buildings) | properties	3
Supply Commitment | Land, Buildings and Improvements
Loss Contingencies [Line Items]
Remaining amount committed or obligated to pay	$ 12,000
Philadelphia | Liberty Property 18th & Arch
Loss Contingencies [Line Items]
Number of equity method investments (in investments) | investment	2		2
Total anticipated development cost	$ 968,000
Philadelphia | Liberty Property 18th & Arch | Construction in Progress
Loss Contingencies [Line Items]
Leaseable square feet (in sqft) | ft²			1.3
American Water Works, Inc | Supply Commitment | Building and Building Improvements
Loss Contingencies [Line Items]
Other commitment	$ 247,800

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Supplemental Disclosure to Statements of Cash Flows - Schedule of Supplemental Disclosures (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Continuing Operations
Other Significant Noncash Transactions [Line Items]
Write off of fully depreciated property and deferred costs	$ 1,110	$ 14,609
Write of depreciated property and deferred costs due to sale and related debt repayment	0	19,564
Change in accrued development capital expenditures	(651)	10,063
Unrealized (loss) gain on cash flow hedge, non cash transaction	(1,970)	487
Capitalized equity-based compensation	705	240
Discontinued operations
Other Significant Noncash Transactions [Line Items]
Write off of fully depreciated property and deferred costs	0	1,886
Write of depreciated property and deferred costs due to sale and related debt repayment	28,221	96,936
Change in accrued development capital expenditures	$ 0	$ (1,424)

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Supplemental Disclosure to Statements of Cash Flows - Cash (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Cash and Cash Equivalents, at Carrying Value [Abstract]
Cash and cash equivalents	$ 21,039	$ 84,923	$ 24,211	$ 11,882
Restricted cash	17,392	10,899	14,865	13,803
Cash, cash equivalents and restricted cash	$ 38,431	$ 95,822	$ 39,076	$ 25,685