Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue
Revenue	$ 126,106	$ 145,331	$ 408,031	$ 433,378
Operating expenses
Property operating expenses	31,567	38,358	102,320	116,542
Real estate taxes	14,923	15,247	48,525	47,119
Third party management expenses	2,509	2,469	7,546	7,035
Depreciation and amortization	43,533	55,627	145,314	158,738
General and administrative expenses	7,069	6,974	23,973	25,217
Total operating expenses	99,601	118,675	327,678	354,651
Gain on sale of real estate
Net gain on disposition of real estate	271,901	356	274,487	356
Net gain on sale of undepreciated real estate	0	250	201	1,501
Total gain on sale of real estate	271,901	606	274,688	1,857
Operating income	298,406	27,262	355,041	80,584
Other income (expense):
Interest income	467	558	1,487	1,636
Interest expense	(16,310)	(20,400)	(56,510)	(61,273)
Interest expense - amortization of deferred financing costs	(715)	(694)	(2,195)	(2,026)
Equity in loss of Real Estate Ventures	(5,788)	(1,965)	(9,882)	(4,814)
Net gain on real estate venture transactions	75	2,059	75	3,594
Net income before income taxes	276,135	6,820	288,016	17,701
Income tax (provision) benefit	(2)	0	224	(46)
Net income	276,133	6,820	288,240	17,655
Net income attributable to noncontrolling interests	(1,612)	(48)	(1,701)	(155)
Net income attributable to Brandywine Realty Trust	274,521	6,772	286,539	17,500
Nonforfeitable dividends allocated to unvested restricted shareholders	(93)	(93)	(317)	(305)
Net income attributable to Common Shareholders of Brandywine Realty Trust	$ 274,428	$ 6,679	$ 286,222	$ 17,195
Basic income per Common Share (in dollars per share)	$ 1.61	$ 0.04	$ 1.66	$ 0.10
Diluted income per Common Share (in dollars per share)	$ 1.60	$ 0.04	$ 1.66	$ 0.10
Basic weighted average shares outstanding (in shares)	170,573,028	176,195,244	172,380,410	176,066,507
Diluted weighted average shares outstanding (in shares)	171,026,492	176,750,600	172,735,436	176,617,726
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Revenue	$ 126,106	$ 145,331	$ 408,031	$ 433,378
Operating expenses
Property operating expenses	31,567	38,358	102,320	116,542
Real estate taxes	14,923	15,247	48,525	47,119
Third party management expenses	2,509	2,469	7,546	7,035
Depreciation and amortization	43,533	55,627	145,314	158,738
General and administrative expenses	7,069	6,974	23,973	25,217
Total operating expenses	99,601	118,675	327,678	354,651
Gain on sale of real estate
Net gain on disposition of real estate	271,901	356	274,487	356
Net gain on sale of undepreciated real estate	0	250	201	1,501
Total gain on sale of real estate	271,901	606	274,688	1,857
Operating income	298,406	27,262	355,041	80,584
Other income (expense):
Interest income	467	558	1,487	1,636
Interest expense	(16,310)	(20,400)	(56,510)	(61,273)
Interest expense - amortization of deferred financing costs	(715)	(694)	(2,195)	(2,026)
Equity in loss of Real Estate Ventures	(5,788)	(1,965)	(9,882)	(4,814)
Net gain on real estate venture transactions	75	2,059	75	3,594
Net income before income taxes	276,135	6,820	288,016	17,701
Income tax (provision) benefit	(2)	0	224	(46)
Net income	276,133	6,820	288,240	17,655
Net (income) loss attributable to noncontrolling interests - consolidated real estate ventures	2	(11)	(20)	(58)
Net income attributable to Brandywine Operating Partnership	276,135	6,809	288,220	17,597
Nonforfeitable dividends allocated to unvested restricted shareholders	(93)	(93)	(317)	(305)
Net income attributable to Common Shareholders of Brandywine Realty Trust	$ 276,042	$ 6,716	$ 287,903	$ 17,292
Basic income per Common Share (in dollars per share)	$ 1.61	$ 0.04	$ 1.66	$ 0.10
Diluted income per Common Share (in dollars per share)	$ 1.60	$ 0.04	$ 1.66	$ 0.10
Basic weighted average shares outstanding (in shares)	171,554,662	177,176,870	173,362,044	177,048,621
Diluted weighted average shares outstanding (in shares)	172,008,126	177,732,226	173,717,070	177,599,840
Rents
Revenue
Revenue	$ 121,277	$ 139,228	$ 392,661	$ 415,113
Rents | BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Revenue	121,277	139,228	392,661	415,113
Third party management fees, labor reimbursement and leasing
Revenue
Service and other revenue	4,324	4,938	13,339	14,041
Third party management fees, labor reimbursement and leasing | BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Service and other revenue	4,324	4,938	13,339	14,041
Other
Revenue
Service and other revenue	505	1,165	2,031	4,224
Other | BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Service and other revenue	$ 505	$ 1,165	$ 2,031	$ 4,224