Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue
Revenue	$ 120,769	$ 145,088
Operating expenses
Property operating expenses	28,935	37,461
Real estate taxes	14,761	16,787
Third party management expenses	2,978	2,662
Depreciation and amortization	40,343	52,038
General and administrative expenses	6,584	8,561
Total operating expenses	93,601	117,509
Gain on sale of real estate
Net gain on disposition of real estate	74	2,586
Net gain on sale of undepreciated real estate	1,993	0
Total gain on sale of real estate	2,067	2,586
Operating income	29,235	30,165
Other income (expense):
Interest and investment income	1,674	575
Interest expense	(16,293)	(20,009)
Interest expense - amortization of deferred financing costs	(709)	(749)
Equity in loss of Real Estate Ventures	(6,924)	(1,891)
Net income before income taxes	6,983	8,091
Income tax provision	(19)	(4)
Net income	6,964	8,087
Net income attributable to noncontrolling interests	(43)	(65)
Net income attributable to Brandywine Realty Trust	6,921	8,022
Nonforfeitable dividends allocated to unvested restricted shareholders	(146)	(131)
Net income attributable to Common Shareholders of Brandywine Realty Trust	$ 6,775	$ 7,891
Basic income per Common Share (in dollars per share)	$ 0.04	$ 0.04
Diluted income per Common Share (in dollars per share)	$ 0.04	$ 0.04
Basic weighted average shares outstanding (in shares)	170,624,741	176,069,968
Diluted weighted average shares outstanding (in shares)	171,636,120	176,653,459
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Revenue	$ 120,769	$ 145,088
Operating expenses
Property operating expenses	28,935	37,461
Real estate taxes	14,761	16,787
Third party management expenses	2,978	2,662
Depreciation and amortization	40,343	52,038
General and administrative expenses	6,584	8,561
Total operating expenses	93,601	117,509
Gain on sale of real estate
Net gain on disposition of real estate	74	2,586
Net gain on sale of undepreciated real estate	1,993	0
Total gain on sale of real estate	2,067	2,586
Operating income	29,235	30,165
Other income (expense):
Interest and investment income	1,674	575
Interest expense	(16,293)	(20,009)
Interest expense - amortization of deferred financing costs	(709)	(749)
Equity in loss of Real Estate Ventures	(6,924)	(1,891)
Net income before income taxes	6,983	8,091
Income tax provision	(19)	(4)
Net income	6,964	8,087
Net (income) loss attributable to noncontrolling interests - consolidated real estate ventures	1	(12)
Net income attributable to Brandywine Operating Partnership	6,965	8,075
Nonforfeitable dividends allocated to unvested restricted shareholders	(146)	(131)
Net income attributable to Common Shareholders of Brandywine Realty Trust	$ 6,819	$ 7,944
Basic income per Common Share (in dollars per share)	$ 0.04	$ 0.04
Diluted income per Common Share (in dollars per share)	$ 0.04	$ 0.04
Basic weighted average shares outstanding (in shares)	171,606,375	177,051,602
Diluted weighted average shares outstanding (in shares)	172,617,754	177,635,093
Rents
Revenue
Revenue	$ 113,484	$ 139,204
Rents | BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Revenue	113,484	139,204
Third party management fees, labor reimbursement and leasing
Revenue
Revenue	6,651	4,954
Third party management fees, labor reimbursement and leasing | BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Revenue	6,651	4,954
Other
Revenue
Revenue	634	930
Other | BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Revenue	$ 634	$ 930