Consolidated Balance Sheets - USD ($) $ in Thousands		Mar. 31, 2019		Dec. 31, 2018
Real estate investments:
Operating properties		$ 4,015,879		$ 3,953,319
Right of use asset - operating leases		22,175	[1]	0
Accumulated depreciation		(891,125)		(865,462)
Operating real estate investments, net		3,146,929		3,087,857
Construction-in-progress		112,176		150,263
Land held for development	[2]	88,047		86,401
Prepaid leasehold interests in land held for development, net	[3]	39,897		39,999
Total real estate investments, net		3,387,049		3,364,520
Assets held for sale, net		7,345		11,599
Cash and cash equivalents		14,449		22,842
Accounts receivable, net of allowance of $284 and $1,653 as of March 31, 2019 and December 31, 2018, respectively		21,780		16,394
Accrued rent receivable, net of allowance of $11,018 and $11,266 as of March 31, 2019 and December 31, 2018, respectively		168,781		165,243
Investment in Real Estate Ventures, equity method		161,568		169,100
Deferred costs, net		95,293		91,075
Intangible assets, net		119,903		131,348
Other assets		139,761		126,400
Total assets		4,115,929		4,098,521
LIABILITIES AND EQUITY
Mortgage notes payable, net		319,132		320,869
Unsecured credit facility		160,500		92,500
Unsecured term loan, net		248,168		248,042
Unsecured senior notes, net		1,366,997		1,366,635
Accounts payable and accrued expenses		112,375		125,696
Distributions payable		34,107		33,632
Deferred income, gains and rent		24,749		28,293
Acquired lease intangibles, net		29,813		31,783
Lease liability - operating leases		22,402		0
Other liabilities		16,194		18,498
Total liabilities		2,334,437		2,265,948
Commitments and contingencies
Equity:
Common Shares of Brandywine Realty Trust's beneficial interest, $0.01 par value; shares authorized 400,000,000; 176,001,580 and 176,873,324 issued and outstanding as of March 31, 2019 and December 31, 2018, respectively		1,761		1,770
Additional paid-in-capital		3,187,312		3,200,850
Deferred compensation payable in common shares		14,640		14,021
Common shares in grantor trust, 1,012,542 and 977,120 issued and outstanding as of March 31, 2019 and December 31, 2018, respectively		(14,640)		(14,021)
Cumulative earnings		795,186		796,513
Accumulated other comprehensive income		2,560		5,029
Cumulative distributions		(2,217,469)		(2,183,909)
Total Brandywine Realty Trust's equity		1,769,350		1,820,253
Noncontrolling interests		12,142		12,320
Total beneficiaries' equity		1,781,492		1,832,573
Total liabilities and beneficiaries' equity		4,115,929		4,098,521
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Real estate investments:
Operating properties		4,015,879		3,953,319
Right of use asset - operating leases		22,175		0
Accumulated depreciation		(891,125)		(865,462)
Operating real estate investments, net		3,146,929		3,087,857
Construction-in-progress		112,176		150,263
Land held for development		88,047		86,401
Prepaid leasehold interests in land held for development, net		39,897		39,999
Total real estate investments, net		3,387,049		3,364,520
Assets held for sale, net		7,345		11,599
Cash and cash equivalents		14,449		22,842
Accounts receivable, net of allowance of $284 and $1,653 as of March 31, 2019 and December 31, 2018, respectively		21,780		16,394
Accrued rent receivable, net of allowance of $11,018 and $11,266 as of March 31, 2019 and December 31, 2018, respectively		168,781		165,243
Investment in Real Estate Ventures, equity method		161,568		169,100
Deferred costs, net		95,293		91,075
Intangible assets, net		119,903		131,348
Other assets		139,761		126,400
Total assets		4,115,929		4,098,521
LIABILITIES AND EQUITY
Mortgage notes payable, net		319,132		320,869
Unsecured credit facility		160,500		92,500
Unsecured term loan, net		248,168		248,042
Unsecured senior notes, net		1,366,997		1,366,635
Accounts payable and accrued expenses		112,375		125,696
Distributions payable		34,107		33,632
Deferred income, gains and rent		24,749		28,293
Acquired lease intangibles, net		29,813		31,783
Lease liability - operating leases		22,402		0
Other liabilities		16,194		18,498
Total liabilities		2,334,437		2,265,948
Commitments and contingencies
Redeemable limited partnership units at redemption value; 982,871 issued and outstanding as of March 31, 2019 and December 31, 2018		15,421		12,520
Equity:
General Partnership Capital; 176,001,580 and 176,873,324 units issued and outstanding as of March 31, 2019 and December 31, 2018, respectively		1,761,580		1,813,136
Accumulated other comprehensive income		2,242		4,725
Total Brandywine Operating Partnership, L.P.'s equity		1,763,822		1,817,861
Non-controlling interest - consolidated real estate ventures		2,249		2,192
Total partners' equity		1,766,071		1,820,053
Total liabilities and beneficiaries' equity		$ 4,115,929		$ 4,098,521

[1] On January 1, 2019, as a result of the adoption of Topic 842, Leases, the Company recognized operating ground leases for which it is a lessee on its consolidated balance sheets for the period ended March 31, 2019. See Note 2, “Basis of Presentation,” for further information.

[2] As of March 31, 2019, the Company categorized 35.2 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. As of December 31, 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. See Note 3, “Real Estate Investments,” for further information.

[3] As of March 31, 2019 and December 31, 2018, this caption comprised leasehold interests in prepaid 99-year ground leases at 3025 and 3001-3003 JFK Boulevard, in Philadelphia, Pennsylvania.