Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Real estate investments:
Operating properties	$ 3,392,734	$ 3,474,109
Accumulated depreciation	(928,245)	(896,561)
Right of use asset - operating leases, net	20,643	20,977
Operating real estate investments, net	2,485,132	2,598,525
Construction-in-progress	286,208	210,311
Land held for development	118,181	117,984
Prepaid leasehold interests in land held for development, net	27,762	39,185
Total real estate investments, net	2,917,283	2,966,005
Assets held for sale, net	7,349	7,349
Cash and cash equivalents	47,730	46,344
Accounts receivable	10,667	13,536
Accrued rent receivable, net of allowance of $5,033 and $5,086 as of June 30, 2021 and December 31, 2020, respectively	162,479	155,372
Investment in unconsolidated real estate ventures	441,464	401,327
Deferred costs, net	83,957	84,856
Intangible assets, net	39,726	48,570
Other assets	178,903	176,747
Total assets	3,889,558	3,900,106
LIABILITIES AND EQUITY
Unsecured credit facility	58,000	0
Unsecured term loan, net	249,346	249,084
Unsecured senior notes, net	1,581,245	1,581,511
Accounts payable and accrued expenses	109,639	121,982
Distributions payable	32,727	32,706
Deferred income, gains and rent	22,917	21,396
Intangible liabilities, net	15,829	18,448
Lease liability - operating leases	22,860	22,758
Other liabilities	45,942	47,573
Total liabilities	2,138,505	2,095,458
Commitments and contingencies (See Note 15)
Equity:
Common Shares of Brandywine Realty Trust's beneficial interest, $0.01 par value; shares authorized 400,000,000; 170,900,491 and 170,572,964 issued and outstanding as of June 30, 2021 and December 31, 2020, respectively	1,709	1,707
Additional paid-in-capital	3,140,575	3,138,152
Deferred compensation payable in common shares	18,491	17,516
Common shares in grantor trust, 1,175,343 and 1,160,494 issued and outstanding as of June 30, 2021 and December 31, 2020, respectively	(18,491)	(17,516)
Cumulative earnings	1,116,837	1,110,083
Accumulated other comprehensive loss	(5,427)	(7,561)
Cumulative distributions	(2,513,373)	(2,448,238)
Total Brandywine Realty Trust's equity	1,740,321	1,794,143
Noncontrolling interests	10,732	10,505
Total beneficiaries' equity	1,751,053	1,804,648
Total liabilities and beneficiaries' equity	3,889,558	3,900,106
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Real estate investments:
Operating properties	3,392,734	3,474,109
Accumulated depreciation	(928,245)	(896,561)
Right of use asset - operating leases, net	20,643	20,977
Operating real estate investments, net	2,485,132	2,598,525
Construction-in-progress	286,208	210,311
Land held for development	118,181	117,984
Prepaid leasehold interests in land held for development, net	27,762	39,185
Total real estate investments, net	2,917,283	2,966,005
Assets held for sale, net	7,349	7,349
Cash and cash equivalents	47,730	46,344
Accounts receivable	10,667	13,536
Accrued rent receivable, net of allowance of $5,033 and $5,086 as of June 30, 2021 and December 31, 2020, respectively	162,479	155,372
Investment in unconsolidated real estate ventures	441,464	401,327
Deferred costs, net	83,957	84,856
Intangible assets, net	39,726	48,570
Other assets	178,903	176,747
Total assets	3,889,558	3,900,106
LIABILITIES AND EQUITY
Unsecured credit facility	58,000	0
Unsecured term loan, net	249,346	249,084
Unsecured senior notes, net	1,581,245	1,581,511
Accounts payable and accrued expenses	109,639	121,982
Distributions payable	32,727	32,706
Deferred income, gains and rent	22,917	21,396
Intangible liabilities, net	15,829	18,448
Lease liability - operating leases	22,860	22,758
Other liabilities	45,942	47,573
Total liabilities	2,138,505	2,095,458
Commitments and contingencies (See Note 15)
Equity:
Redeemable limited partnership units at redemption value; 823,983 and 981,634 issued and outstanding as of June 30, 2021 and December 31, 2020, respectively	11,450	11,566
General Partnership Capital; 170,900,491 and 170,572,964 units issued and outstanding as of June 30, 2021 and December 31, 2020, respectively	1,745,322	1,800,945
Accumulated other comprehensive loss	(5,789)	(7,935)
Total Brandywine Operating Partnership, L.P.'s equity	1,739,533	1,793,010
Noncontrolling interest - consolidated real estate ventures	70	72
Total partners' equity	1,739,603	1,793,082
Total liabilities and beneficiaries' equity	$ 3,889,558	$ 3,900,106