Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Net income	$ 8,811	$ 22,187
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	157,773	151,066
Amortization of deferred financing costs	3,952	3,502
Amortization of debt discount/(premium), net	(455)	1,112
Amortization of stock compensation costs	3,622	5,510
Shares used for employee taxes upon vesting of share awards	(1,263)	(1,062)
Recognized hedge activity	828	0
Straight-line rent income	(11,416)	(16,337)
Amortization of acquired above (below) market leases, net	(5,206)	(5,372)
Straight-line ground rent expense	66	1,286
Provision for doubtful accounts	1,687	1,777
Net (gain) loss on real estate venture transactions	417	(3,683)
Net gain on sale of interests in real estate	(5,882)	(3,044)
Net gain from remeasurement of investment in a real estate venture	(458)	(7,847)
Historic tax credit transaction income	(11,853)	(11,853)
Loss on early extinguishment of debt	2,606	1,127
Provision for impairment on assets held for sale	1,765	0
Real estate venture income in excess of distributions	659	(2,371)
Deferred financing obligation	(864)	(1,392)
Changes in assets and liabilities:
Accounts receivable	(4,586)	(287)
Other assets	(10,317)	(6,660)
Accounts payable and accrued expenses	9,304	14,684
Deferred income, gains and rent	(4,430)	1,265
Other liabilities	(1,760)	1,718
Net cash from operating activities	133,000	145,326
Cash flows from investing activities:
Acquisition of properties	(12,405)	(20,758)
Sales of properties, net	81,625	145,931
Distribution of sales proceeds from real estate venture	0	16,963
Proceeds from repayment of mortgage notes receivable	5,125	200
Capital expenditures for tenant improvements	(85,698)	(64,481)
Capital expenditures for redevelopments	(10,195)	(5,288)
Capital expenditures for developments	(48,057)	(5,399)
Reimbursement from real estate venture for pre-formation development costs	0	1,976
Advances for purchase of tenant assets, net of repayments	(212)	(420)
Investment in unconsolidated Real Estate Ventures	(16,330)	(30,142)
Escrowed cash	1,076	902
Cash distributions from unconsolidated Real Estate Ventures in excess of cumulative equity income	7,341	3,661
Leasing costs	(17,018)	(25,704)
Net cash from (used in) investing activities	(94,748)	17,441
Cash flows from financing activities:
Proceeds from Credit Facility borrowings	0	186,000
Repayments of Credit Facility borrowings	0	(255,000)
Repayments of mortgage notes payable	(9,994)	(8,351)
Repayments of unsecured term loans	(250,828)	0
Proceeds from unsecured notes	496,459	0
Deferred financing obligation interest expense	0	697
Net proceeds from issuance of common shares	335,016	181,527
Repayments of unsecured notes	(120,361)	(13,027)
Debt financing costs	(3,630)	(6)
Exercise of stock options	709	2,240
Distributions paid to shareholders	(76,081)	(72,061)
Distributions to noncontrolling interest	(806)	(818)
Net cash from financing activities	370,484	21,201
Increase in cash and cash equivalents	408,736	183,968
Cash and cash equivalents at beginning of period	263,207	1,549
Cash and cash equivalents at end of period	671,943	185,517
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the nine months ended September 30, 2014 and 2013 of $4,466 and $2,012, respectively	92,196	76,528
Supplemental disclosure of non-cash activity:
Change in operating real estate related to a non-cash acquisition of an operating property	0	(21,649)
Change in intangible assets, net related to non-cash acquisition of an operating property	0	(3,517)
Change in acquired lease intangibles, net related to non-cash acquisition of an operating property	0	462
Change in investments in joint venture related to non-cash disposition of property	(5,897)	0
Change in investments in joint venture related to non-cash acquisition of property	0	13,040
Change in operating real estate related to non-cash adjustment to land	0	(4,386)
Change in receivable from settlement of acquisitions	619	0
Change in investments in real estate ventures related to a contribution of land	0	(6,058)
Change in capital expenditures financed through accounts payable at period end	4,415	1,210
Change in capital expenditures financed through retention payable at period end	3,479	(736)
Change in unfunded tenant allowance	(327)	(811)
Conversion of LP Units to Common Shares	655	1,241
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Net income	8,811	22,187
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	157,773	151,066
Amortization of deferred financing costs	3,952	3,502
Amortization of debt discount/(premium), net	(455)	1,112
Amortization of stock compensation costs	3,622	5,510
Shares used for employee taxes upon vesting of share awards	(1,263)	(1,062)
Recognized hedge activity	828	0
Straight-line rent income	(11,416)	(16,337)
Amortization of acquired above (below) market leases, net	(5,206)	(5,372)
Straight-line ground rent expense	66	1,286
Provision for doubtful accounts	1,687	1,777
Net (gain) loss on real estate venture transactions	417	(3,683)
Net gain on sale of interests in real estate	(5,882)	(3,044)
Net gain from remeasurement of investment in a real estate venture	(458)	(7,847)
Historic tax credit transaction income	(11,853)	(11,853)
Loss on early extinguishment of debt	2,606	1,127
Provision for impairment on assets held for sale	1,765	0
Real estate venture income in excess of distributions	659	(2,371)
Deferred financing obligation	(864)	(1,392)
Changes in assets and liabilities:
Accounts receivable	(4,586)	(287)
Other assets	(10,317)	(6,660)
Accounts payable and accrued expenses	9,304	14,684
Deferred income, gains and rent	(4,430)	1,265
Other liabilities	(1,760)	1,718
Net cash from operating activities	133,000	145,326
Cash flows from investing activities:
Acquisition of properties	(12,405)	(20,758)
Sales of properties, net	81,625	145,931
Distribution of sales proceeds from real estate venture	0	16,963
Proceeds from repayment of mortgage notes receivable	5,125	200
Capital expenditures for tenant improvements	(85,698)	(64,481)
Capital expenditures for redevelopments	(10,195)	(5,288)
Capital expenditures for developments	(48,057)	(5,399)
Reimbursement from real estate venture for pre-formation development costs	0	1,976
Advances for purchase of tenant assets, net of repayments	(212)	(420)
Investment in unconsolidated Real Estate Ventures	(16,330)	(30,142)
Escrowed cash	1,076	902
Cash distributions from unconsolidated Real Estate Ventures in excess of cumulative equity income	7,341	3,661
Leasing costs	(17,018)	(25,704)
Net cash from (used in) investing activities	(94,748)	17,441
Cash flows from financing activities:
Proceeds from Credit Facility borrowings	0	186,000
Repayments of Credit Facility borrowings	0	(255,000)
Repayments of mortgage notes payable	(9,994)	(8,351)
Repayments of unsecured term loans	(250,828)	0
Proceeds from unsecured notes	496,459	0
Deferred financing obligation interest expense	0	697
Net proceeds from issuance of common shares	335,016	181,527
Repayments of unsecured notes	(120,361)	(13,027)
Debt financing costs	(3,630)	(6)
Exercise of stock options	709	2,240
Distributions paid to shareholders	(76,887)	(72,879)
Net cash from financing activities	370,484	21,201
Increase in cash and cash equivalents	408,736	183,968
Cash and cash equivalents at beginning of period	263,207	1,549
Cash and cash equivalents at end of period	671,943	185,517
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the nine months ended September 30, 2014 and 2013 of $4,466 and $2,012, respectively	92,196	76,528
Supplemental disclosure of non-cash activity:
Change in operating real estate related to a non-cash acquisition of an operating property	0	(21,649)
Change in intangible assets, net related to non-cash acquisition of an operating property	0	(3,517)
Change in acquired lease intangibles, net related to non-cash acquisition of an operating property	0	462
Change in investments in joint venture related to non-cash disposition of property	(5,897)	0
Change in investments in joint venture related to non-cash acquisition of property	0	13,040
Change in operating real estate related to non-cash adjustment to land	0	(4,386)
Change in receivable from settlement of acquisitions	619	0
Change in investments in real estate ventures related to a contribution of land	0	(6,058)
Change in capital expenditures financed through accounts payable at period end	4,415	1,210
Change in capital expenditures financed through retention payable at period end	3,479	(736)
Change in unfunded tenant allowance	(327)	(811)
Conversion of LP Units to Common Shares	$ 655	$ 1,241