Consolidated Balance Sheets - USD ($) $ in Thousands		Sep. 30, 2018	Dec. 31, 2017
Real estate investments:
Operating properties		$ 3,429,048	$ 3,832,348
Accumulated depreciation		(845,674)	(895,091)
Operating real estate investments, net		2,583,374	2,937,257
Construction-in-progress		157,075	121,188
Land held for development	[1]	77,578	98,242
Prepaid leasehold interests in land held for development, net	[2]	40,100	0
Total real estate investments, net		2,858,127	3,156,687
Assets held for sale, net		297,194	392
Cash and cash equivalents		70,360	202,179
Accounts receivable, net of allowance of $3,782 and $3,467 as of September 30, 2018 and December 31, 2017, respectively		13,871	17,938
Accrued rent receivable, net of allowance of $13,562 and $13,645 as of September 30, 2018 and December 31, 2017, respectively		178,013	169,760
Investment in Real Estate Ventures, equity method		167,782	194,621
Deferred costs, net		97,004	96,695
Intangible assets, net		55,139	64,972
Other assets		186,132	92,204
Total assets		3,923,622	3,995,448
LIABILITIES AND EQUITY
Mortgage notes payable, net		322,588	317,216
Unsecured term loan, net		248,677	248,429
Unsecured senior notes, net		1,366,272	1,365,183
Accounts payable and accrued expenses		116,994	107,074
Distributions payable		32,492	32,456
Deferred income, gains and rent		26,731	42,593
Acquired lease intangibles, net		17,680	20,274
Liabilities related to assets held for sale		826	0
Other liabilities		14,559	15,623
Total liabilities		2,146,819	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; 178,602,602 and 178,285,236 issued and outstanding as of September 30, 2018 and December 31, 2017, respectively		1,787	1,784
Additional paid-in-capital		3,223,817	3,218,564
Deferred compensation payable in common shares		14,021	12,445
Common shares in grantor trust, 977,120 and 894,736 issued and outstanding as of September 30, 2018 and December 31, 2017, respectively		(14,021)	(12,445)
Cumulative earnings		674,599	660,174
Accumulated other comprehensive income		10,239	2,399
Cumulative distributions		(2,150,463)	(2,053,741)
Total Brandywine Realty Trust's equity		1,759,979	1,829,180
Noncontrolling interests		16,824	17,420
Total beneficiaries' equity		1,776,803	1,846,600
Total liabilities and beneficiaries' equity		3,923,622	3,995,448
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Real estate investments:
Operating properties		3,429,048	3,832,348
Accumulated depreciation		(845,674)	(895,091)
Operating real estate investments, net		2,583,374	2,937,257
Construction-in-progress		157,075	121,188
Land held for development		77,578	98,242
Prepaid leasehold interests in land held for development, net		40,100	0
Total real estate investments, net		2,858,127	3,156,687
Assets held for sale, net		297,194	392
Cash and cash equivalents		70,360	202,179
Accounts receivable, net of allowance of $3,782 and $3,467 as of September 30, 2018 and December 31, 2017, respectively		13,871	17,938
Accrued rent receivable, net of allowance of $13,562 and $13,645 as of September 30, 2018 and December 31, 2017, respectively		178,013	169,760
Investment in Real Estate Ventures, equity method		167,782	194,621
Deferred costs, net		97,004	96,695
Intangible assets, net		55,139	64,972
Other assets		186,132	92,204
Total assets		3,923,622	3,995,448
LIABILITIES AND EQUITY
Mortgage notes payable, net		322,588	317,216
Unsecured term loan, net		248,677	248,429
Unsecured senior notes, net		1,366,272	1,365,183
Accounts payable and accrued expenses		116,994	107,074
Distributions payable		32,492	32,456
Deferred income, gains and rent		26,731	42,593
Acquired lease intangibles, net		17,680	20,274
Liabilities related to assets held for sale		826	0
Other liabilities		14,559	15,623
Total liabilities		2,146,819	2,148,848
Commitments and contingencies
Redeemable limited partnership units at redemption value; 1,479,799 issued and outstanding as of September 30, 2018 and December 31, 2017		23,239	26,918
Equity:
General Partnership Capital; 178,602,602 and 178,285,236 issued and outstanding as of September 30, 2018 and December 31, 2017, respectively		1,741,379	1,815,411
Accumulated other comprehensive income		9,962	2,056
Total Brandywine Operating Partnership, L.P.'s equity		1,751,341	1,817,467
Non-controlling interest - consolidated real estate ventures		2,223	2,215
Total partners' equity		1,753,564	1,819,682
Total liabilities and beneficiaries' equity		$ 3,923,622	$ 3,995,448

[1] As of September 30, 2018, the Company categorized 37.9 acres of land held for development, comprised of 2.7 acres and 35.2 acres, located in the Pennsylvania Suburbs segment and Other segment, respectively, as held for sale in accordance with applicable accounting standards for long lived assets. 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.

[2] As of September 30, 2018, this caption comprised leasehold interests in prepaid 99-year ground leases at 3025 and 3001-3003 JFK Boulevard, in Philadelphia, Pennsylvania. See Note 3, “Real Estate Investments,” for further information.