Consolidated Balance Sheets - USD ($) $ in Thousands		Mar. 31, 2018	Dec. 31, 2017
Real estate investments:
Operating properties		$ 3,864,706	$ 3,832,348
Accumulated depreciation		(920,207)	(895,091)
Operating real estate investments, net		2,944,499	2,937,257
Construction-in-progress		129,413	121,188
Land held for development	[1]	99,436	98,242
Total real estate investments, net		3,173,348	3,156,687
Assets held for sale, net		0	392
Cash and cash equivalents		200,813	202,179
Accounts receivable, net of allowance of $3,935 and $3,467 as of March 31, 2018 and December 31, 2017, respectively		17,794	17,938
Accrued rent receivable, net of allowance of $13,409 and $13,645 as of March 31, 2018 and December 31, 2017, respectively		174,236	169,760
Investment in Real Estate Ventures, equity method		171,383	194,621
Deferred costs, net		97,299	96,695
Intangible assets, net		63,614	64,972
Other assets		139,449	92,204
Total assets		4,037,936	3,995,448
LIABILITIES AND EQUITY
Mortgage notes payable, net		325,974	317,216
Unsecured term loans, net		248,512	248,429
Unsecured senior notes, net		1,365,546	1,365,183
Accounts payable and accrued expenses		105,176	107,074
Distributions payable		32,502	32,456
Deferred income, gains and rent		58,887	42,593
Acquired lease intangibles, net		19,510	20,274
Other liabilities		14,588	15,623
Total liabilities		2,170,695	2,148,848
Commitments and contingencies
Equity:
Common Shares of Brandywine Realty Trust's beneficial interest, $0.01 par value; shares authorized 400,000,000; 178,442,517 and 178,285,236 issued and outstanding as of March 31, 2018 and December 31, 2017, respectively		1,785	1,784
Additional paid-in-capital		3,222,047	3,218,564
Deferred compensation payable in common shares		13,506	12,445
Common shares in grantor trust, 948,592 and 894,736 as of March 31, 2018 and December 31, 2017, respectively		(13,506)	(12,445)
Cumulative earnings		704,506	660,174
Accumulated other comprehensive income		7,365	2,399
Cumulative distributions		(2,086,000)	(2,053,741)
Total Brandywine Realty Trust's equity		1,849,703	1,829,180
Noncontrolling interests		17,538	17,420
Total beneficiaries' equity		1,867,241	1,846,600
Total liabilities and beneficiaries' equity		4,037,936	3,995,448
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Real estate investments:
Operating properties		3,864,706	3,832,348
Accumulated depreciation		(920,207)	(895,091)
Operating real estate investments, net		2,944,499	2,937,257
Construction-in-progress		129,413	121,188
Land held for development		99,436	98,242
Total real estate investments, net		3,173,348	3,156,687
Assets held for sale, net		0	392
Cash and cash equivalents		200,813	202,179
Accounts receivable, net of allowance of $3,935 and $3,467 as of March 31, 2018 and December 31, 2017, respectively		17,794	17,938
Accrued rent receivable, net of allowance of $13,409 and $13,645 as of March 31, 2018 and December 31, 2017, respectively		174,236	169,760
Investment in Real Estate Ventures, equity method		171,383	194,621
Deferred costs, net		97,299	96,695
Intangible assets, net		63,614	64,972
Other assets		139,449	92,204
Total assets		4,037,936	3,995,448
LIABILITIES AND EQUITY
Mortgage notes payable, net		325,974	317,216
Unsecured term loans, net		248,512	248,429
Unsecured senior notes, net		1,365,546	1,365,183
Accounts payable and accrued expenses		105,176	107,074
Distributions payable		32,502	32,456
Deferred income, gains and rent		58,887	42,593
Acquired lease intangibles, net		19,510	20,274
Other liabilities		14,588	15,623
Total liabilities		2,170,695	2,148,848
Commitments and contingencies
Redeemable limited partnership units at redemption value; 1,479,799 issued and outstanding in as of September 30, 2017 and December 31, 2016		23,049	26,918
Equity:
General Partnership Capital; 175,477,498 and 175,140,760 units issued and outstanding as of September 30, 2017 and December 31, 2016, respectively		1,834,947	1,815,411
Accumulated other comprehensive income		7,064	2,056
Total Brandywine Operating Partnership, L.P.'s equity		1,842,011	1,817,467
Non-controlling interest - consolidated real estate ventures		2,181	2,215
Total partners' equity		1,844,192	1,819,682
Total liabilities and beneficiaries' equity		$ 4,037,936	$ 3,995,448

[1] As of December 31, 2017, the Company categorized 13.1 acres of land held for development, located in the Other segment, as held for sale in accordance with applicable accounting standards for long lived assets.