Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue
Total revenue	$ 144,151	$ 133,786	$ 288,047	$ 270,144
Operating expenses
Property operating expenses	38,684	37,906	78,184	77,257
Real estate taxes	16,089	12,417	31,872	24,839
Third party management expenses	2,449	2,243	4,566	6,993
Depreciation and amortization	51,667	43,958	103,111	87,490
General and administrative expenses	8,399	7,523	18,243	16,246
Total operating expenses	117,288	104,047	235,976	212,825
Gain on sale of real estate
Net loss on disposition of real estate	0	(35)	0	(35)
Net gain on sale of undepreciated real estate	250	2,837	1,251	2,859
Total gain on sale of real estate	250	2,802	1,251	2,824
Operating income	27,113	32,541	53,322	60,143
Other income (expense):
Interest income	553	641	1,078	1,344
Interest expense	(20,516)	(19,301)	(40,873)	(38,834)
Interest expense - amortization of deferred financing costs	(666)	(627)	(1,332)	(1,254)
Equity in loss of Real Estate Ventures	(1,491)	(358)	(2,849)	(1,183)
Net gain on real estate venture transactions	1,276	0	1,535	37,263
Net income before income taxes	6,269	12,896	10,881	57,479
Income tax provision	(17)	(20)	(46)	(158)
Net income	6,252	12,876	10,835	57,321
Net income attributable to noncontrolling interests	(47)	(129)	(107)	(504)
Net income attributable to Brandywine Realty Trust	6,205	12,747	10,728	56,817
Nonforfeitable dividends allocated to unvested restricted shareholders	(93)	(86)	(212)	(200)
Net income attributable to Common Shareholders of Brandywine Realty Trust	$ 6,112	$ 12,661	$ 10,516	$ 56,617
Basic income per Common Share	$ 0.03	$ 0.07	$ 0.06	$ 0.32
Diluted income per Common Share	$ 0.03	$ 0.07	$ 0.06	$ 0.31
Basic weighted average shares outstanding	176,143,206	178,547,555	176,001,071	178,471,960
Diluted weighted average shares outstanding	176,690,824	179,692,336	176,578,140	179,740,690
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Total revenue	$ 144,151	$ 133,786	$ 288,047	$ 270,144
Operating expenses
Property operating expenses	38,684	37,906	78,184	77,257
Real estate taxes	16,089	12,417	31,872	24,839
Third party management expenses	2,449	2,243	4,566	6,993
Depreciation and amortization	51,667	43,958	103,111	87,490
General and administrative expenses	8,399	7,523	18,243	16,246
Total operating expenses	117,288	104,047	235,976	212,825
Gain on sale of real estate
Net loss on disposition of real estate	0	(35)	0	(35)
Net gain on sale of undepreciated real estate	250	2,837	1,251	2,859
Total gain on sale of real estate	250	2,802	1,251	2,824
Operating income	27,113	32,541	53,322	60,143
Other income (expense):
Interest income	553	641	1,078	1,344
Interest expense	(20,516)	(19,301)	(40,873)	(38,834)
Interest expense - amortization of deferred financing costs	(666)	(627)	(1,332)	(1,254)
Equity in loss of Real Estate Ventures	(1,491)	(358)	(2,849)	(1,183)
Net gain on real estate venture transactions	1,276	0	1,535	37,263
Net income before income taxes	6,269	12,896	10,881	57,479
Income tax provision	(17)	(20)	(46)	(158)
Net income	6,252	12,876	10,835	57,321
Net income attributable to non-controlling interests - consolidated real estate ventures	(13)	(21)	(47)	(26)
Net Income (Loss) Allocated to Limited Partners	6,239	12,855	10,788	57,295
Nonforfeitable dividends allocated to unvested restricted shareholders	(93)	(86)	(212)	(200)
Net income attributable to Common Shareholders of Brandywine Realty Trust	$ 6,146	$ 12,769	$ 10,576	$ 57,095
Basic income per Common Share	$ 0.03	$ 0.07	$ 0.06	$ 0.32
Diluted income per Common Share	$ 0.03	$ 0.07	$ 0.06	$ 0.32
Basic weighted average shares outstanding	177,125,064	180,027,354	176,983,433	179,951,759
Diluted weighted average shares outstanding	177,672,683	181,172,135	177,560,502	181,220,489
Rents [Member]
Revenue
Lease revenue	$ 137,787	$ 126,927	$ 275,885	$ 253,686
Rents [Member] | BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Lease revenue	137,787	126,927	275,885	253,686
Third Party Management Fees, Labor Reimbursement and Leasing [Member]
Revenue
Service and other revenue	5,148	4,913	9,103	12,587
Third Party Management Fees, Labor Reimbursement and Leasing [Member] | BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Service and other revenue	5,148	4,913	9,103	12,587
Other [Member]
Revenue
Service and other revenue	1,216	1,946	3,059	3,871
Other [Member] | BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Service and other revenue	$ 1,216	$ 1,946	$ 3,059	$ 3,871