CONSOLIDATED STATEMENTS OF OPERATIONS - BRANDYWINE OPERATING PARTNERSHIP, L.P. - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue
Total revenue	$ 506,100	$ 486,819	$ 534,852
Operating expenses
Property operating expenses	130,209	121,890	132,172
Real estate taxes	53,645	53,621	63,032
Third party management expenses	10,547	12,800	10,252
Depreciation and amortization	177,984	178,105	188,283
General and administrative expenses	35,006	30,153	30,288
Provision for impairment	4,663	0	0
Total operating expenses	412,054	396,569	424,027
Gain on sale of real estate
Net gain on disposition of real estate	17,677	142	289,461
Net gain on sale of undepreciated real estate	8,007	2,903	201
Total gain on sale of real estate	25,684	3,045	289,662
Operating income	119,730	93,295	400,487
Other income (expense):
Interest and investment income	1,905	8,295	1,939
Interest expense	(68,764)	(62,617)	(73,911)
Interest expense - amortization of deferred financing costs	(3,091)	(2,836)	(2,904)
Equity in loss of unconsolidated real estate ventures	(22,016)	(26,697)	(18,584)
Net gain on real estate venture transactions	26,718	2,973	75
Loss on early extinguishment of debt	(435)	0	0
Net income before income taxes	54,047	12,413	307,102
Income tax (provision) benefit	(55)	(47)	224
Net income	53,992	12,366	307,326
Nonforfeitable dividends allocated to unvested restricted shareholders	(456)	(421)	(410)
Net income attributable to Common Shareholders, Basic	$ 53,368	$ 11,868	$ 305,117
Basic income per Common Partnership Unit (in dollars per share)	$ 0.31	$ 0.07	$ 1.77
Diluted income per Common Partnership Unit (in dollars per share)	$ 0.31	$ 0.07	$ 1.77
Basic weighted average common partnership units outstanding (in shares)	171,491,369	170,878,185	171,926,079
Diluted weighted average common partnership units outstanding (in shares)	172,325,646	172,273,240	172,317,076
Rents
Revenue
Total revenue	$ 470,851	$ 451,519	$ 513,504
Third party management fees, labor reimbursement and leasing
Revenue
Total revenue	24,132	26,444	18,580
Other
Revenue
Total revenue	11,117	8,856	2,768
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Total revenue	506,100	486,819	534,852
Operating expenses
Property operating expenses	130,209	121,890	132,172
Real estate taxes	53,645	53,621	63,032
Third party management expenses	10,547	12,800	10,252
Depreciation and amortization	177,984	178,105	188,283
General and administrative expenses	35,006	30,153	30,288
Provision for impairment	4,663	0	0
Total operating expenses	412,054	396,569	424,027
Gain on sale of real estate
Net gain on disposition of real estate	17,677	142	289,461
Net gain on sale of undepreciated real estate	8,007	2,903	201
Total gain on sale of real estate	25,684	3,045	289,662
Operating income	119,730	93,295	400,487
Other income (expense):
Interest and investment income	1,905	8,295	1,939
Interest expense	(68,764)	(62,617)	(73,911)
Interest expense - amortization of deferred financing costs	(3,091)	(2,836)	(2,904)
Equity in loss of unconsolidated real estate ventures	(22,016)	(26,697)	(18,584)
Net gain on real estate venture transactions	26,718	2,973	75
Loss on early extinguishment of debt	(435)	0	0
Net income before income taxes	54,047	12,413	307,102
Income tax (provision) benefit	(55)	(47)	224
Net income	53,992	12,366	307,326
Net (income) loss attributable to noncontrolling interests - consolidated real estate ventures	2	3	(20)
Net income attributable to Brandywine Operating Partnership	53,994	12,369	307,306
Nonforfeitable dividends allocated to unvested restricted shareholders	(456)	(421)	(410)
Net income attributable to Common Shareholders, Basic	$ 53,538	$ 11,948	$ 306,896
Basic income per Common Partnership Unit (in dollars per share)	$ 0.31	$ 0.07	$ 1.77
Diluted income per Common Partnership Unit (in dollars per share)	$ 0.31	$ 0.07	$ 1.77
Basic weighted average common partnership units outstanding (in shares)	172,036,481	171,770,843	172,907,713
Diluted weighted average common partnership units outstanding (in shares)	172,870,758	173,165,898	173,298,710
BRANDYWINE OPERATING PARTNERSHIP, L.P. | Rents
Revenue
Total revenue	$ 470,851	$ 451,519	$ 513,504
BRANDYWINE OPERATING PARTNERSHIP, L.P. | Third party management fees, labor reimbursement and leasing
Revenue
Total revenue	24,132	26,444	18,580
BRANDYWINE OPERATING PARTNERSHIP, L.P. | Other
Revenue
Total revenue	$ 11,117	$ 8,856	$ 2,768