Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net loss	$ (113)	$ (12,615)
Adjustments to reconcile net loss to net cash from operating activities:
Depreciation and amortization	164,014	156,953
Amortization of deferred financing costs	3,844	2,700
Amortization of debt discount/(premium), net	1,028	590
Straight-line rent income	(14,925)	(9,179)
Amortization of acquired above (below) market leases to rental revenue, net	(4,011)	(4,535)
Straight-line ground rent expense	1,450	1,172
Provision for doubtful accounts	1,190	2,276
Non-cash compensation expense	3,189	3,744
Real estate venture income in excess of distributions	(1,020)	(2,779)
Net gain on sale of interests in real estate	(6,627)	(6,346)
Loss on early extinguishment of debt	580	1,701
Historic tax credit transaction income	(12,026)
Cumulative interest accretion of repayments of unsecured notes		(2,716)
Contributions from historic tax credit transaction, net of deferred costs		27,396
Changes in assets and liabilities:
Accounts receivable	2,130	(1,540)
Other assets	(5,000)	(16,051)
Accounts payable and accrued expenses	21,382	11,238
Deferred income, gains and rent	(4,376)	(7,368)
Other liabilities	5,284	4,981
Net cash from operating activities	155,993	149,622
Cash flows from investing activities:
Acquisition of properties	(40,674)	(50,342)
Sales of properties, net	5,639	17,352
Proceeds from repayment of mortgage notes receivable		40,000
Capital expenditures	(97,557)	(144,884)
Advances for purchase of tenant assets, net of repayments	(1,552)	(4,514)
Loan provided to unconsolidated Real Estate Venture partner	(1,045)
Investment in unconsolidated Real Estate Ventures	(2,259)
Cash distributions from unconsolidated Real Estate Ventures in excess of cumulative equity income	3,432	1,453
Decrease in cash due to the deconsolidation of variable interest entities		(1,382)
Leasing costs	(28,460)	(16,720)
Net cash used in investing activities	(162,476)	(159,037)
Cash flows from financing activities:
Proceeds from Credit Facility borrowings	407,502	344,000
Repayments of Credit Facility borrowings	(424,502)	(414,000)
Proceeds from mortgage notes payable		253,981
Repayments of mortgage notes payable	(218,959)	(6,533)
Proceeds from unsecured notes	321,498
Repayments of unsecured notes	(25,366)	(66,408)
Net settlement of hedge transactions	(613)
Debt financing costs	(4,199)	(492)
Refund of deferred financing costs related to forward commitment		1,659
Net proceeds from issuance of shares	7,966	65,990
Exercise of stock options	659
Distributions paid to shareholders	(67,119)	(65,045)
Distributions to noncontrolling interest	(1,243)	(1,263)
Net cash from (used in) financing activities	(4,376)	111,889
Increase (decrease) in cash and cash equivalents	(10,859)	102,474
Cash and cash equivalents at beginning of period	16,565	1,567
Cash and cash equivalents at end of period	5,706	104,041
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the nine months ended September 30, 2011 and 2010 of $1,450 and $9,468, respectively	78,091	85,824
Supplemental disclosure of non-cash activity:
Proceeds from mortgage notes payable retained by lender and included in other assets		2,519
Change in capital expenditures financed through accounts payable at period end	(2,114)	(7,805)
Change in capital expenditures financed through retention payable at period end	(5,863)	1,362
Change in unfunded tenant allowance	(442)	(2,926)
Change in real estate investments due to the deconsolidation of variable interest entities		(37,126)
Change in mortgage notes payable due to the deconsolidation of variable interest entities		(42,877)
Change in non-controlling interest from issuance of limited partnership units		77,733
Distributions payable	23,505	22,624
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Cash flows from operating activities:
Net loss	(113)	(12,615)
Adjustments to reconcile net loss to net cash from operating activities:
Depreciation and amortization	164,014	156,953
Amortization of deferred financing costs	3,844	2,700
Amortization of debt discount/(premium), net	1,028	590
Straight-line rent income	(14,925)	(9,179)
Amortization of acquired above (below) market leases to rental revenue, net	(4,011)	(4,535)
Straight-line ground rent expense	1,450	1,172
Provision for doubtful accounts	1,190	2,276
Non-cash compensation expense	3,189	3,744
Real estate venture income in excess of distributions	(1,020)	(2,779)
Net gain on sale of interests in real estate	(6,627)	(6,346)
Loss on early extinguishment of debt	580	1,701
Historic tax credit transaction income	(12,026)
Cumulative interest accretion of repayments of unsecured notes		(2,716)
Contributions from historic tax credit transaction, net of deferred costs		27,396
Changes in assets and liabilities:
Accounts receivable	2,130	(1,540)
Other assets	(5,000)	(16,051)
Accounts payable and accrued expenses	21,382	11,238
Deferred income, gains and rent	(4,376)	(7,368)
Other liabilities	5,284	4,981
Net cash from operating activities	155,993	149,622
Cash flows from investing activities:
Acquisition of properties	(40,674)	(50,342)
Sales of properties, net	5,639	17,352
Proceeds from repayment of mortgage notes receivable		40,000
Capital expenditures	(97,557)	(144,884)
Advances for purchase of tenant assets, net of repayments	(1,552)	(4,514)
Loan provided to unconsolidated Real Estate Venture partner	(1,045)
Investment in unconsolidated Real Estate Ventures	(2,259)
Cash distributions from unconsolidated Real Estate Ventures in excess of cumulative equity income	3,432	1,453
Decrease in cash due to the deconsolidation of variable interest entities		(1,382)
Leasing costs	(28,460)	(16,720)
Net cash used in investing activities	(162,476)	(159,037)
Cash flows from financing activities:
Proceeds from Credit Facility borrowings	407,502	344,000
Repayments of Credit Facility borrowings	(424,502)	(414,000)
Proceeds from mortgage notes payable		253,981
Repayments of mortgage notes payable	(218,959)	(6,533)
Proceeds from unsecured notes	321,498
Repayments of unsecured notes	(25,366)	(66,408)
Net settlement of hedge transactions	(613)
Debt financing costs	(4,199)	(492)
Refund of deferred financing costs related to forward commitment		1,659
Net proceeds from issuance of shares	7,966	65,990
Exercise of stock options	659
Distributions paid to shareholders	(68,362)	(66,308)
Net cash from (used in) financing activities	(4,376)	111,889
Increase (decrease) in cash and cash equivalents	(10,859)	102,474
Cash and cash equivalents at beginning of period	16,565	1,567
Cash and cash equivalents at end of period	5,706	104,041
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the nine months ended September 30, 2011 and 2010 of $1,450 and $9,468, respectively	78,091	85,824
Supplemental disclosure of non-cash activity:
Proceeds from mortgage notes payable retained by lender and included in other assets		2,519
Change in capital expenditures financed through accounts payable at period end	(2,114)	(7,805)
Change in capital expenditures financed through retention payable at period end	(5,863)	1,362
Change in unfunded tenant allowance	(442)	(2,926)
Change in real estate investments due to the deconsolidation of variable interest entities		(37,126)
Change in mortgage notes payable due to the deconsolidation of variable interest entities		(42,877)
Change in non-controlling interest from issuance of limited partnership units		77,733
Distributions payable	$ 23,505	$ 22,624