Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities:
Net income (loss)	$ 33,227	$ (113)
Adjustments to reconcile net loss to net cash from operating activities:
Depreciation and amortization	150,362	164,014
Amortization of deferred financing costs	3,790	3,844
Amortization of debt discount/(premium), net	1,095	1,028
Amortization of stock compensation costs	3,740	4,201
Shares used for employee taxes upon vesting of share awards	(2,232)	(1,012)
Straight-line rent income	(17,792)	(14,925)
Amortization of above (below) Market Leases, Net	(4,468)	(4,011)
Straight-line ground rent expense	1,423	1,450
Provision for doubtful accounts	1,363	1,190
Real estate venture income in excess of distributions	(1,024)	(1,020)
Net gain on sale of interests in real estate	(34,773)	(6,627)
Loss on real estate venture formation	950	0
Loss on early extinguishment of debt	1,549	580
Historic tax credit transaction income	(11,840)	(12,026)
Changes in assets and liabilities:
Accounts receivable	1,580	2,130
Other assets	(7,200)	(5,000)
Accounts payable and accrued expenses	9,565	21,382
Deferred income, gains and rent	(4,681)	(4,376)
Deferred financing obligation	(1,314)	0
Other liabilities	(1,175)	5,284
Net cash from operating activities	122,145	155,993
Cash flows from investing activities:
Acquisition of properties	(9,226)	(40,674)
Investments in Available-for-sale Securities, Debt	(98,250)	0
Proceeds from the sale of available-for-sale securities	98,250	0
Sales of properties, net	170,918	5,639
Proceeds from repayment of mortgage notes receivable	23,930	0
Capital expenditures	(73,649)	(97,557)
Advances for purchase of tenant assets, net of repayments	(13)	(1,552)
Loan provided to unconsolidated Real Estate Venture partner	0	(1,045)
Investment in unconsolidated Real Estate Ventures	(49,763)	(2,259)
Cash distributions from unconsolidated Real Estate Ventures in excess of cumulative equity income	2,779	3,432
Leasing costs	(22,111)	(28,460)
Net cash from (used in) investing activities	42,865	(162,476)
Cash flows from financing activities:
Proceeds from New Unsecured Term Loans	600,000	0
Proceeds from Credit Facility	21,500	407,502
Repayments of Credit Facility	(297,000)	(424,502)
Repayments of mortgage notes payable	(9,209)	(218,959)
Proceeds from unsecured notes	0	321,498
Deferred financing obligation non-cash interest expense	701	0
Net Proceeds from Issuance of Common Stock	0	7,966
Net Proceeds from Issuance of Preferred Stock and Preference Stock	96,240	0
Redemption of preferred units	(50,188)	0
Repayments from unsecured notes	(167,841)	(25,366)
Repayments of unsecured term loan	(37,500)	0
Net settlement of hedge transactions	(74)	(613)
Debt financing costs	(8,462)	(4,199)
Exercise of stock options	748	659
Distributions paid to shareholders/unitholders	(71,523)	(67,119)
Distributions to noncontrolling interest	(1,196)	(1,243)
Net cash from (used in) financing activities	76,196	(4,376)
Increase (decrease) in cash and cash equivalents	241,206	(10,859)
Cash and cash equivalents at beginning of period	410	16,565
Cash and cash equivalents at end of period	241,616	5,706
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the nine months ended September 30, 2012 and 2011 of $1,978 and $1,450, respectively	83,618	78,091
Supplemental disclosure of non-cash activity:
Change in capital expenditures financed through accounts payable at period end	(1,270)	(2,114)
Change in capital expenditures financed through retention payable at period end	284	(5,863)
Change in unfunded tenant allowance	(1,411)	(442)
Distributions payable	24,820	23,505
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Cash flows from operating activities:
Net income (loss)	33,227	(113)
Adjustments to reconcile net loss to net cash from operating activities:
Depreciation and amortization	150,362	164,014
Amortization of deferred financing costs	3,790	3,844
Amortization of debt discount/(premium), net	1,095	1,028
Amortization of stock compensation costs	3,740	4,201
Shares used for employee taxes upon vesting of share awards	(2,232)	(1,012)
Straight-line rent income	(17,792)	(14,925)
Amortization of above (below) Market Leases, Net	(4,468)	(4,011)
Straight-line ground rent expense	1,423	1,450
Provision for doubtful accounts	1,363	1,190
Real estate venture income in excess of distributions	(1,024)	(1,020)
Net gain on sale of interests in real estate	(34,773)	(6,627)
Loss on real estate venture formation	950	0
Loss on early extinguishment of debt	1,549	580
Historic tax credit transaction income	(11,840)	(12,026)
Changes in assets and liabilities:
Accounts receivable	1,580	2,130
Other assets	(7,200)	(5,000)
Accounts payable and accrued expenses	9,565	21,382
Deferred income, gains and rent	(4,681)	(4,376)
Deferred financing obligation	(1,314)	0
Other liabilities	(1,175)	5,284
Net cash from operating activities	122,145	155,993
Cash flows from investing activities:
Acquisition of properties	(9,226)	(40,674)
Investments in Available-for-sale Securities, Debt	(98,250)	0
Proceeds from the sale of available-for-sale securities	98,250	0
Sales of properties, net	170,918	5,639
Proceeds from repayment of mortgage notes receivable	23,930	0
Capital expenditures	(73,649)	(97,557)
Advances for purchase of tenant assets, net of repayments	(13)	(1,552)
Loan provided to unconsolidated Real Estate Venture partner	0	(1,045)
Investment in unconsolidated Real Estate Ventures	(49,763)	(2,259)
Cash distributions from unconsolidated Real Estate Ventures in excess of cumulative equity income	2,779	3,432
Leasing costs	(22,111)	(28,460)
Net cash from (used in) investing activities	42,865	(162,476)
Cash flows from financing activities:
Proceeds from New Unsecured Term Loans	600,000	0
Proceeds from Credit Facility	21,500	407,502
Repayments of Credit Facility	(297,000)	(424,502)
Repayments of mortgage notes payable	(9,209)	(218,959)
Proceeds from unsecured notes		321,498
Deferred financing obligation non-cash interest expense	701	0
Net Proceeds from Issuance of Common Stock	0	7,966
Net Proceeds from Issuance of Preferred Stock and Preference Stock	96,240	0
Redemption of preferred units	(50,188)	0
Repayments from unsecured notes	(167,841)	(25,366)
Repayments of unsecured term loan	(37,500)	0
Net settlement of hedge transactions	(74)	(613)
Debt financing costs	(8,462)	(4,199)
Exercise of stock options	748	659
Distributions paid to shareholders/unitholders	(72,719)	(68,362)
Net cash from (used in) financing activities	76,196	(4,376)
Increase (decrease) in cash and cash equivalents	241,206	(10,859)
Cash and cash equivalents at beginning of period	410	16,565
Cash and cash equivalents at end of period	241,616	5,706
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the nine months ended September 30, 2012 and 2011 of $1,978 and $1,450, respectively	83,618	78,091
Supplemental disclosure of non-cash activity:
Change in capital expenditures financed through accounts payable at period end	(1,270)	(2,114)
Change in capital expenditures financed through retention payable at period end	284	(5,863)
Change in unfunded tenant allowance	(1,411)	(442)
Distributions payable	$ 24,820	$ 23,505