Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Revenue:
Rents	$ 480,600	$ 461,101	$ 467,188
Tenant reimbursements	81,236	77,139	76,652
Termination fees	2,993	5,576	3,601
Third party management fees, labor reimbursement and leasing	11,536	11,830	17,151
Other	5,440	4,310	3,328
Total revenue	581,805	559,956	567,920
Operating Expenses:
Property operating expenses	171,991	167,911	162,940
Real estate taxes	56,230	53,564	56,224
Third party management expenses	5,590	5,866	7,996
Depreciation and amortization	217,680	210,592	203,572
General and administrative expenses	24,602	23,306	20,821
Total operating expenses	476,093	461,239	451,553
Operating income	105,712	98,717	116,367
Other Income (Expense):
Interest income	1,813	3,222	2,499
Historic tax credit transaction income	12,026	0	0
Interest expense	(131,405)	(132,640)	(135,740)
Interest expense - amortization of deferred financing costs	(4,991)	(3,770)	(5,864)
Recognized hedge activity	0	0	(916)
Equity in income of real estate ventures	3,775	5,305	4,069
Net gain on sale of interests in real estate	2,791	0	(3)
Net gain on sale of undepreciated real estate	45	0	0
Loss on real estate venture formation	(222)	0	0
(Loss) gain on early extinguishment of debt	(2,776)	(2,110)	23,176
Income (loss) from continuing operations	(13,232)	(31,276)	3,588
Discontinued operations:
Income from discontinued operations	1,253	2,659	6,960
Net (loss) gain on disposition of discontinued operations	7,264	11,011	1,241
Provision for impairment	0	0	(3,700)
Total discontinued operations	8,517	13,670	4,501
Net income (loss)	(4,715)	(17,606)	8,089
Net (income) loss from discontinued operations attributable to non-controlling interests - LP units	(332)	(288)	(91)
Net income attributable to non-controlling interests — partners’ share of consolidated real estate ventures	0	0	(30)
Net (income) loss attributable to non-controlling interests - LP units	548	820	58
Net (income) loss attributable to non-controlling interests	216	532	(63)
Net income (loss) attributable to Brandywine Realty Trust	(4,499)	(17,074)	8,026
Distribution to Preferred Shares	(7,992)	(7,992)	(7,992)
Amount allocated to unvested restricted shareholders	(505)	(512)	(279)
Net loss attributable to Common Shareholders of Brandywine Realty Trust	(12,996)	(25,578)	(245)
Basic earnings (loss) per Common Share:
Continuing operations	$ (0.16)	$ (0.29)	$ (0.04)
Discontinued operations	$ 0.06	$ 0.10	$ 0.04
Basic loss per Common Share	$ (0.10)	$ (0.19)	$ 0.00
Diluted earnings (loss) per Common Share:
Continuing operations	$ (0.16)	$ (0.29)	$ (0.04)
Discontinued operations	$ 0.06	$ 0.10	$ 0.04
Diluted loss per Common Share	$ (0.10)	$ (0.19)	$ 0.00
Basic weighted average shares outstanding	135,444,424	131,743,275	111,898,045
Diluted weighted average shares outstanding	135,444,424	131,743,275	113,251,291
Net income (loss) attributable to Brandywine Realty Trust
Income (loss) from continuing operations	(12,684)	(30,456)	3,616
Income (loss) from discontinued operations	8,185	13,382	4,410
Net income (loss)	(4,499)	(17,074)	8,026
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue:
Rents	480,600	461,101	467,188
Tenant reimbursements	81,236	77,139	76,652
Termination fees	2,993	5,576	3,601
Third party management fees, labor reimbursement and leasing	11,536	11,830	17,151
Other	5,440	4,310	3,328
Total revenue	581,805	559,956	567,920
Operating Expenses:
Property operating expenses	171,991	167,911	162,940
Real estate taxes	56,230	53,564	56,224
Third party management expenses	5,590	5,866	7,996
Depreciation and amortization	217,680	210,592	203,572
General and administrative expenses	24,602	23,306	20,821
Total operating expenses	476,093	461,239	451,553
Operating income	105,712	98,717	116,367
Other Income (Expense):
Interest income	1,813	3,222	2,499
Historic tax credit transaction income	12,026	0	0
Interest expense	(131,405)	(132,640)	(135,740)
Interest expense - amortization of deferred financing costs	(4,991)	(3,770)	(5,864)
Recognized hedge activity	0	0	(916)
Equity in income of real estate ventures	3,775	5,305	4,069
Net gain on sale of interests in real estate	2,791	0	(3)
Net gain on sale of undepreciated real estate	45	0	0
Loss on real estate venture formation	(222)	0	0
(Loss) gain on early extinguishment of debt	(2,776)	(2,110)	23,176
Income (loss) from continuing operations	(13,232)	(31,276)	3,588
Discontinued operations:
Income from discontinued operations	1,253	2,659	6,960
Net (loss) gain on disposition of discontinued operations	7,264	11,011	1,241
Provision for impairment	0	0	(3,700)
Total discontinued operations	8,517	13,670	4,501
Net income (loss)	(4,715)	(17,606)	8,089
Net (income) loss attributable to non-controlling interests	0	0	(30)
Net income (loss) attributable to Brandywine Realty Trust	(4,715)	(17,606)	8,059
Distribution to Preferred Shares	(7,992)	(7,992)	(7,992)
Amount allocated to unvested restricted shareholders	(505)	(512)	(279)
Net loss attributable to Common Shareholders of Brandywine Realty Trust	(13,212)	(26,110)	(212)
Basic earnings (loss) per Common Share:
Continuing operations	$ (0.15)	$ (0.29)	$ (0.04)
Discontinued operations	$ 0.06	$ 0.10	$ 0.04
Basic loss per Common Share	$ (0.09)	$ (0.19)	$ 0.00
Diluted earnings (loss) per Common Share:
Continuing operations	$ (0.15)	$ (0.29)	$ (0.04)
Discontinued operations	$ 0.06	$ 0.10	$ 0.04
Diluted loss per Common Share	$ (0.09)	$ (0.19)	$ 0.00
Basic weighted average shares outstanding	145,118,841	137,454,796	114,712,869
Diluted weighted average shares outstanding	145,118,841	137,454,796	116,066,115
Net income (loss) attributable to Brandywine Realty Trust
Income (loss) from continuing operations	(13,232)	(31,276)	3,558
Income (loss) from discontinued operations	8,517	13,670	4,501
Net income (loss)	$ (4,715)	$ (17,606)	$ 8,059