Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
ASSETS
Land and land improvements	$ 1,184,927	$ 1,188,774
Building and improvements	5,131,648	5,339,314
Less accumulated depreciation	(1,148,928)	(1,182,129)
Operating real estate	5,167,647	5,345,959
Development in progress	360,948	277,411
Land held for development	336,967	269,059
Net real estate	5,865,562	5,892,429
Cash and cash equivalents	35,353	69,346
Restricted cash	9,018	20,325
Accounts receivable, net	14,343	15,481
Deferred rent receivable, net	118,787	107,909
Deferred financing and leasing costs, net	192,109	192,764
Investments in and advances to unconsolidated joint ventures	218,454	208,832
Assets held for sale	4,954	13,529
Prepaid expenses and other assets	99,049	91,399
Total assets	6,557,629	6,612,014
LIABILITIES
Mortgage loans, net	307,908	484,852
Unsecured notes, net	2,580,108	2,498,021
Credit facility	259,000	167,000
Accounts payable	51,382	52,043
Accrued interest	26,154	24,513
Dividend and distributions payable	71,787	72,253
Other liabilities	243,806	219,418
Total liabilities	3,540,145	3,518,100
Noncontrolling interest - operating partnership - 301,483 preferred units outstanding as of December 31, 2015 and December 31, 2014	7,537	7,537
EQUITY
Common shares of beneficial interest, $.001 par value, 283,987,000 shares authorized; 147,577,984 and 148,557,270 shares issued and outstanding as of December 31, 2015 and December 31, 2014, respectively	148	149
Additional paid-in capital	3,669,627	3,688,644
Accumulated other comprehensive loss	(17,893)	(6,252)
Distributions in excess of net income	(698,954)	(654,869)
Total Liberty Property Trust shareholders' equity	2,952,928	3,027,672
Noncontrolling interest - operating partnership
Noncontrolling interest - operating partnerships	53,100	54,786
Noncontrolling interest - consolidated joint ventures	3,919	3,919
Total equity	3,009,947	3,086,377
Total liabilities, noncontrolling interest - operating partnership and equity	6,557,629	6,612,014
Liberty Property Limited Partnership [Member]
ASSETS
Land and land improvements	1,184,927	1,188,774
Building and improvements	5,131,648	5,339,314
Less accumulated depreciation	(1,148,928)	(1,182,129)
Operating real estate	5,167,647	5,345,959
Development in progress	360,948	277,411
Land held for development	336,967	269,059
Net real estate	5,865,562	5,892,429
Cash and cash equivalents	35,353	69,346
Restricted cash	9,018	20,325
Accounts receivable, net	14,343	15,481
Deferred rent receivable, net	118,787	107,909
Deferred financing and leasing costs, net	192,109	192,764
Investments in and advances to unconsolidated joint ventures	218,454	208,832
Assets held for sale	4,954	13,529
Prepaid expenses and other assets	99,049	91,399
Total assets	6,557,629	6,612,014
LIABILITIES
Mortgage loans, net	307,908	484,852
Unsecured notes, net	2,580,108	2,498,021
Credit facility	259,000	167,000
Accounts payable	51,382	52,043
Accrued interest	26,154	24,513
Dividend and distributions payable	71,787	72,253
Other liabilities	243,806	219,418
Total liabilities	3,540,145	3,518,100
Noncontrolling interest - operating partnership - 301,483 preferred units outstanding as of December 31, 2015 and December 31, 2014	7,537	7,537
EQUITY
General partner’s equity	2,952,928	3,027,672
Limited partners’ equity	53,100	54,786
Noncontrolling interest - operating partnership
Noncontrolling interest - consolidated joint ventures	3,919	3,919
Total equity	3,009,947	3,086,377
Total liabilities, noncontrolling interest - operating partnership and equity	$ 6,557,629	$ 6,612,014