Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net loss	$ (6,724)	$ (5,999)
Adjustments to reconcile net loss to net cash from operating activities:
Depreciation and amortization	109,775	104,622
Amortization of deferred financing costs	1,998	1,873
Amortization of debt discount/(premium), net	529	490
Straight-line rent income	(9,447)	(5,408)
Amortization of acquired above (below) market leases to rental revenue, net	(2,636)	(3,181)
Straight-line ground rent expense	975	740
Provision for doubtful accounts	689	1,717
Non-cash compensation expense	2,051	2,492
Real estate venture income in excess of distributions	(1,618)	(1,958)
Net gain on sale of interests in real estate	(6,627)	(6,349)
Loss on early extinguishment of debt	756	1,637
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	2,063	161
Other assets	2,231	2,074
Accounts payable and accrued expenses	(4,500)	(7,089)
Deferred income, gains and rent	(5,048)	(5,594)
Other liabilities	3,875	(1,906)
Net cash from operating activities	88,342	103,002
Cash flows from investing activities:
Acquisition of properties	(22,032)
Sales of properties, net	5,639	10,445
Capital expenditures	(67,768)	(89,438)
Advances for purchase of tenant assets, net of repayments	(386)	(9,116)
Loan provided to an unconsolidated Real Estate Venture partner	(1,045)
Cash distributions from unconsolidated Real Estate Ventures in excess of cumulative equity income	3,063	801
Decrease in cash due to the deconsolidation of variable interest entities		(1,382)
Leasing costs	(14,724)	(11,594)
Net cash used in investing activities	(97,253)	(100,284)
Cash flows from financing activities:
Proceeds from Credit Facility borrowings	181,500	231,000
Repayments of Credit Facility borrowings	(322,500)	(163,000)
Repayments of mortgage notes payable	(122,204)	(4,467)
Proceeds from unsecured notes	321,498
Repayments of unsecured notes	(23,931)	(64,604)
Net settlement of hedge transactions	(613)
Debt financing costs	(3,662)	8
Net proceeds from issuance of shares	8,069	41,021
Exercise of stock options	429
Distributions paid to shareholders	(44,669)	(43,104)
Distributions to noncontrolling interest	(838)	(842)
Net cash from (used in) financing activities	(6,921)	(3,988)
Increase (decrease) in cash and cash equivalents	(15,832)	(1,270)
Cash and cash equivalents at beginning of period	16,565	1,567
Cash and cash equivalents at end of period	733	297
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the six months ended June 30, 2011 and 2010 of $ 859 and $6,791, respectively	67,098	80,150
Supplemental disclosure of non-cash activity:
Change in capital expenditures financed through accounts payable at period end	903	(2,739)
Change in capital expenditures financed through retention payable at period end	(5,500)	1,624
Change in unfunded tenant allowance	514	(2,418)
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)
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Cash flows from operating activities:
Net loss	(6,724)	(5,999)
Adjustments to reconcile net loss to net cash from operating activities:
Depreciation and amortization	109,775	104,622
Amortization of deferred financing costs	1,998	1,873
Amortization of debt discount/(premium), net	529	490
Straight-line rent income	(9,447)	(5,408)
Amortization of acquired above (below) market leases to rental revenue, net	(2,636)	(3,181)
Straight-line ground rent expense	975	740
Provision for doubtful accounts	689	1,717
Non-cash compensation expense	2,051	2,492
Real estate venture income in excess of distributions	(1,618)	(1,958)
Net gain on sale of interests in real estate	(6,627)	(6,349)
Loss on early extinguishment of debt	756	1,637
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	2,063	161
Other assets	2,231	2,074
Accounts payable and accrued expenses	(4,500)	(7,089)
Deferred income, gains and rent	(5,048)	(5,594)
Other liabilities	3,875	(1,906)
Net cash from operating activities	88,342	103,002
Cash flows from investing activities:
Acquisition of properties	(22,032)
Sales of properties, net	5,639	10,445
Capital expenditures	(67,768)	(89,438)
Advances for purchase of tenant assets, net of repayments	(386)	(9,116)
Loan provided to an unconsolidated Real Estate Venture partner	(1,045)
Cash distributions from unconsolidated Real Estate Ventures in excess of cumulative equity income	3,063	801
Decrease in cash due to the deconsolidation of variable interest entities		(1,382)
Leasing costs	(14,724)	(11,594)
Net cash used in investing activities	(97,253)	(100,284)
Cash flows from financing activities:
Proceeds from Credit Facility borrowings	181,500	231,000
Repayments of Credit Facility borrowings	(322,500)	(163,000)
Repayments of mortgage notes payable	(122,204)	(4,467)
Proceeds from unsecured notes	321,498
Repayments of unsecured notes	(23,931)	(64,604)
Net settlement of hedge transactions	(613)
Debt financing costs	(3,662)	8
Net proceeds from issuance of shares	8,069	41,021
Exercise of stock options	429
Distributions paid to shareholders	(45,507)	(43,946)
Net cash from (used in) financing activities	(6,921)	(3,988)
Increase (decrease) in cash and cash equivalents	(15,832)	(1,270)
Cash and cash equivalents at beginning of period	16,565	1,567
Cash and cash equivalents at end of period	733	297
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the six months ended June 30, 2011 and 2010 of $ 859 and $6,791, respectively	67,098	80,150
Supplemental disclosure of non-cash activity:
Change in capital expenditures financed through accounts payable at period end	903	(2,739)
Change in capital expenditures financed through retention payable at period end	(5,500)	1,624
Change in unfunded tenant allowance	514	(2,418)
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)