Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash flows from operating activities:
Net income (loss)	$ 16,138	$ (6,724)
Adjustments to reconcile net loss to net cash from operating activities:
Depreciation and amortization	101,624	109,776
Amortization of deferred financing costs	2,572	1,998
Amortization of debt discount/(premium), net	745	529
Amortization of stock compensation costs	2,433	3,063
Shares used for employee taxes upon vesting of share awards	(2,234)	(1,012)
Straight-line rent income	(12,861)	(9,447)
Amortization of acquired above (below) market leases to rental revenue, net	(2,922)	(2,636)
Straight-line ground rent expense	949	975
Provision for doubtful accounts	962	689
Real estate venture income in excess of distributions	(590)	(1,618)
Net gain on sale of interests in real estate	(24,834)	(6,627)
Loss on early extinguishment of debt	1,498	756
Changes in assets and liabilities:
Accounts receivable	3,561	2,063
Other assets	5,260	2,231
Accounts payable and accrued expenses	(11,546)	(4,500)
Deferred income, gains and rent	(2,871)	(5,048)
Deferred financing obligation	(825)	0
Other liabilities	(1,438)	3,874
Net cash from operating activities	75,621	88,342
Cash flows from investing activities:
Acquisition of properties	(9,226)	(22,032)
Payments to Acquire Available-for-sale Securities, Debt	(98,744)	0
Proceeds from the sale of available-for-sale securities	56,322	0
Sales of properties, net	120,957	5,639
Proceeds from repayment of mortgage notes receivable	23,931	0
Capital expenditures	(51,701)	(67,768)
Advances for purchase of tenant assets, net of repayments	283	(386)
Loan provided to unconsolidated Real Estate Venture partner	0	(1,045)
Investment in unconsolidated Real Estate Ventures	(18,617)	0
Cash distributions from unconsolidated Real Estate Ventures in excess of cumulative equity income	1,723	3,063
Leasing costs	(14,940)	(14,724)
Net cash from (used in) investing activities	9,988	(97,253)
Cash flows from financing activities:
Proceeds from New Unsecured Term Loans	600,000	0
Proceeds from Credit Facility	21,500	181,500
Repayments of Credit Facility	(297,000)	(322,500)
Repayments of mortgage notes payable	(6,028)	(122,204)
Proceeds from Unsecured Notes Payable	0	321,498
Deferred financing obligation non-cash interest expense	468	0
Proceeds from Issuance of Common Stock	0	8,069
Proceeds from Issuance of Preferred Stock and Preference Stock	96,240	0
Redemption of preferred units	(50,188)	0
Repayments from unsecured notes	(167,371)	(23,931)
Repayments of unsecured term loan	(37,500)	0
Net settlement of hedge transactions	(74)	(613)
Debt financing costs	(8,431)	(3,662)
Proceeds from Stock Options Exercised	276	429
Distributions paid to shareholders/unitholders	(47,059)	(44,669)
Distributions to noncontrolling interest	(797)	(838)
Net cash from (used in) financing activities	104,036	(6,921)
Increase (decrease) in cash and cash equivalents	189,645	(15,832)
Cash and cash equivalents at beginning of period	410	16,565
Cash and cash equivalents at end of period	190,055	733
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the six months ended June 30, 2012 and 2011 of $1,207 and $859, respectively	69,480	67,098
Supplemental disclosure of non-cash activity:
Change in capital expenditures financed through accounts payable at period end	(1,735)	903
Change in capital expenditures financed through retention payable at period end	56	(5,500)
Change in unfunded tenant allowance	(1,144)	514
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Cash flows from operating activities:
Net income (loss)	16,138	(6,724)
Adjustments to reconcile net loss to net cash from operating activities:
Depreciation and amortization	101,624	109,776
Amortization of deferred financing costs	2,572	1,998
Amortization of debt discount/(premium), net	745	529
Amortization of stock compensation costs	2,433	3,063
Shares used for employee taxes upon vesting of share awards	(2,234)	(1,012)
Straight-line rent income	(12,861)	(9,447)
Amortization of acquired above (below) market leases to rental revenue, net	(2,922)	(2,636)
Straight-line ground rent expense	949	975
Provision for doubtful accounts	962	689
Real estate venture income in excess of distributions	(590)	(1,618)
Net gain on sale of interests in real estate	(24,834)	(6,627)
Loss on early extinguishment of debt	1,498	756
Changes in assets and liabilities:
Accounts receivable	3,561	2,063
Other assets	5,260	2,231
Accounts payable and accrued expenses	(11,546)	(4,500)
Deferred income, gains and rent	(2,871)	(5,048)
Deferred financing obligation	(825)	0
Other liabilities	(1,438)	3,874
Net cash from operating activities	75,621	88,342
Cash flows from investing activities:
Acquisition of properties	(9,226)	(22,032)
Payments to Acquire Available-for-sale Securities, Debt	(98,744)	0
Proceeds from the sale of available-for-sale securities	56,322	0
Sales of properties, net	120,957	5,639
Proceeds from repayment of mortgage notes receivable	23,931	0
Capital expenditures	(51,701)	(67,768)
Advances for purchase of tenant assets, net of repayments	283	(386)
Loan provided to unconsolidated Real Estate Venture partner	0	(1,045)
Investment in unconsolidated Real Estate Ventures	(18,617)	0
Cash distributions from unconsolidated Real Estate Ventures in excess of cumulative equity income	1,723	3,063
Leasing costs	(14,940)	(14,724)
Net cash from (used in) investing activities	9,988	(97,253)
Cash flows from financing activities:
Proceeds from New Unsecured Term Loans	600,000	0
Proceeds from Credit Facility	21,500	181,500
Repayments of Credit Facility	(297,000)	(322,500)
Repayments of mortgage notes payable	(6,028)	(122,204)
Deferred financing obligation non-cash interest expense	468	0
Proceeds from Issuance of Common Stock	0	8,069
Proceeds from Issuance of Preferred Stock and Preference Stock	96,240	0
Redemption of preferred units	(50,188)	0
Repayments from unsecured notes	(167,371)	(23,931)
Repayments of unsecured term loan	(37,500)	0
Net settlement of hedge transactions	(74)	(613)
Debt financing costs	(8,431)	(3,662)
Proceeds from Stock Options Exercised	276	429
Distributions paid to shareholders/unitholders	(47,856)	(45,507)
Net cash from (used in) financing activities	104,036	(6,921)
Increase (decrease) in cash and cash equivalents	189,645	(15,832)
Cash and cash equivalents at beginning of period	410	16,565
Cash and cash equivalents at end of period	190,055	733
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the six months ended June 30, 2012 and 2011 of $1,207 and $859, respectively	69,480	67,098
Supplemental disclosure of non-cash activity:
Change in capital expenditures financed through accounts payable at period end	(1,735)	903
Change in capital expenditures financed through retention payable at period end	56	(5,500)
Change in unfunded tenant allowance	$ (1,144)	$ 514