CONSOLIDATED BALANCE SHEETS - BRANDYWINE OPERATING PARTNERSHIP, L.P. - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Real estate investments:
Operating properties	$ 3,472,602	$ 3,474,109
Accumulated depreciation	(957,450)	(896,561)
Right of use asset - operating leases, net	20,313	20,977
Operating real estate investments, net	2,535,465	2,598,525
Construction-in-progress	277,237	210,311
Land held for development	114,604	117,984
Prepaid leasehold interests in land held for development, net	27,762	39,185
Total real estate investments, net	2,955,068	2,966,005
Assets held for sale, net	562	7,349
Cash and cash equivalents	27,463	46,344
Accounts receivable	11,875	13,536
Accrued rent receivable, net of allowance of $4,133 and $5,086 as of December 31, 2021 and December 31, 2020, respectively	167,210	155,372
Investment in unconsolidated real estate ventures	435,506	401,327
Deferred costs, net	86,862	84,856
Intangible assets, net	28,556	48,570
Other assets	133,094	176,747
Total assets	3,846,196	3,900,106
LIABILITIES AND BENEFICIARIES' EQUITY
Unsecured credit facility	23,000	0
Unsecured term loan, net	249,608	249,084
Unsecured senior notes, net	1,580,978	1,581,511
Accounts payable and accrued expenses	150,151	121,982
Distributions payable	32,765	32,706
Deferred income, gains and rent	23,849	21,396
Intangible liabilities, net	12,981	18,448
Lease liability - operating leases	22,962	22,758
Other liabilities	48,683	47,573
Total liabilities	2,144,977	2,095,458
Commitments and contingencies (See Note 20)
Brandywine Operating Partnership, L.P.'s equity:
Accumulated other comprehensive loss	(2,020)	(7,561)
Total liabilities and partners' equity	3,846,196	3,900,106
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Real estate investments:
Operating properties	3,472,602	3,474,109
Accumulated depreciation	(957,450)	(896,561)
Right of use asset - operating leases, net	20,313	20,977
Operating real estate investments, net	2,535,465	2,598,525
Construction-in-progress	277,237	210,311
Land held for development	114,604	117,984
Prepaid leasehold interests in land held for development, net	27,762	39,185
Total real estate investments, net	2,955,068	2,966,005
Assets held for sale, net	562	7,349
Cash and cash equivalents	27,463	46,344
Accounts receivable	11,875	13,536
Accrued rent receivable, net of allowance of $4,133 and $5,086 as of December 31, 2021 and December 31, 2020, respectively	167,210	155,372
Investment in unconsolidated real estate ventures	435,506	401,327
Deferred costs, net	86,862	84,856
Intangible assets, net	28,556	48,570
Other assets	133,094	176,747
Total assets	3,846,196	3,900,106
LIABILITIES AND BENEFICIARIES' EQUITY
Unsecured credit facility	23,000	0
Unsecured term loan, net	249,608	249,084
Unsecured senior notes, net	1,580,978	1,581,511
Accounts payable and accrued expenses	150,151	121,982
Distributions payable	32,765	32,706
Deferred income, gains and rent	23,849	21,396
Intangible liabilities, net	12,981	18,448
Lease liability - operating leases	22,962	22,758
Other liabilities	48,683	47,573
Total liabilities	2,144,977	2,095,458
Commitments and contingencies (See Note 20)
Redeemable limited partnership units at redemption value; 823,983 and 981,634 issued and outstanding as of December 31, 2021 and December 31, 2020, respectively	11,140	11,566
Brandywine Operating Partnership, L.P.'s equity:
General Partnership Capital; 171,126,257 and 170,572,964 units issued and outstanding as of December 31, 2021 and December 31, 2020, respectively	1,689,611	1,800,945
Accumulated other comprehensive loss	(2,366)	(7,935)
Total Brandywine Operating Partnership, L.P.'s equity	1,687,245	1,793,010
Noncontrolling interest - consolidated real estate ventures	2,834	72
Total partners' equity	1,690,079	1,793,082
Total liabilities and partners' equity	$ 3,846,196	$ 3,900,106