Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net income (loss)	$ (2,245)	$ 3,919
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	52,570	50,304
Amortization of deferred financing costs	1,189	1,161
Amortization of debt discount/(premium), net	(162)	366
Amortization of stock compensation costs	3,048	2,097
Share-based compensation expense relating to awards withheld for employee taxes upon vesting of share awards	(531)	(245)
Straight-line rent income	(3,592)	(5,514)
Amortization of acquired above (below) market leases, net	(1,957)	(1,771)
Straight-line ground rent expense	22	474
Provision for doubtful accounts	897	505
Loss on real estate venture transactions	135	0
Loss on early extinguishment of debt	0	3
Real estate venture income in excess of distributions	(123)	(358)
Deferred financing obligation	(272)	(452)
Changes in assets and liabilities:
Accounts receivable	(5,759)	(1,321)
Other assets	(7,508)	(4,352)
Accounts payable and accrued expenses	14,400	10,793
Increase (Decrease) in Leasing Receivables	1,714	46
Other liabilities	(199)	(88)
Net cash from operating activities	50,440	50,263
Cash flows from investing activities:
Acquisition of properties	(13,972)	0
Sales of properties, net	3,350	112,863
Proceeds from Sale of Equity Method Investments	0	16,963
Proceeds from repayment of mortgage notes receivable	1,200	200
Capital expenditures for tenant improvements	(36,222)	(24,215)
Capital expenditures for redevelopments	(1,031)	(2,427)
Capital expenditures for developments	(1,851)	(82)
Reimbursement from real estate venture for pre-formation development costs	0	1,976
Advances for purchase of tenant assets, net of repayments	94	(375)
Investment in unconsolidated Real Estate Ventures	(808)	(7,039)
Escrowed cash	1,636	(420)
Cash distributions from unconsolidated Real Estate Ventures in excess of cumulative equity income	2,828	1,357
Leasing costs	(3,589)	(8,250)
Net cash from (used in) investing activities	(48,365)	90,551
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	(3,349)	(2,765)
Deferred financing obligation interest expense	0	234
Debt financing costs	(35)	0
Exercise of stock options	0	672
Distributions paid to shareholders	(25,330)	(23,353)
Distributions to noncontrolling interest	(277)	(277)
Net cash used in financing activities	(28,991)	(94,489)
Increase (Decrease) in cash and cash equivalents	(26,916)	46,325
Cash and cash equivalents at beginning of period	263,207	1,549
Cash and cash equivalents at end of period	236,291	47,874
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the three months ended March 31, 2014 and 2013 of $1,230 and $625, respectively	19,213	11,367
Supplemental disclosure of non-cash activity:
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	8,228	(1,701)
Change in capital expenditures financed through retention payable at period end	538	(697)
Change in unfunded tenant allowance	(43)	(64)
Gain (Loss) on Sale of Properties	1,187	5,304
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Net income (loss)	(2,245)	3,919
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	52,570	50,304
Amortization of deferred financing costs	1,189	1,161
Amortization of debt discount/(premium), net	(162)	366
Amortization of stock compensation costs	3,048	2,097
Share-based compensation expense relating to awards withheld for employee taxes upon vesting of share awards	(531)	(245)
Straight-line rent income	(3,592)	(5,514)
Amortization of acquired above (below) market leases, net	(1,957)	(1,771)
Straight-line ground rent expense	22	474
Provision for doubtful accounts	897	505
Loss on real estate venture transactions	135	0
Loss on early extinguishment of debt	0	3
Real estate venture income in excess of distributions	(123)	(358)
Deferred financing obligation	(272)	(452)
Changes in assets and liabilities:
Accounts receivable	(5,759)	(1,321)
Other assets	(7,508)	(4,352)
Accounts payable and accrued expenses	14,400	10,793
Increase (Decrease) in Leasing Receivables	1,714	46
Other liabilities	(199)	(88)
Net cash from operating activities	50,440	50,263
Cash flows from investing activities:
Acquisition of properties	(13,972)	0
Sales of properties, net	3,350	112,863
Proceeds from Sale of Equity Method Investments	0	16,963
Proceeds from repayment of mortgage notes receivable	1,200	200
Capital expenditures for tenant improvements	(36,222)	(24,215)
Capital expenditures for redevelopments	(1,031)	(2,427)
Capital expenditures for developments	(1,851)	(82)
Reimbursement from real estate venture for pre-formation development costs	0	1,976
Advances for purchase of tenant assets, net of repayments	94	(375)
Investment in unconsolidated Real Estate Ventures	(808)	(7,039)
Escrowed cash	1,636	(420)
Cash distributions from unconsolidated Real Estate Ventures in excess of cumulative equity income	2,828	1,357
Leasing costs	(3,589)	(8,250)
Net cash from (used in) investing activities	(48,365)	90,551
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	(3,349)	(2,765)
Deferred financing obligation interest expense	0	234
Debt financing costs	(35)	0
Exercise of stock options	0	672
Distributions paid to shareholders	(25,607)	(23,630)
Net cash used in financing activities	(28,991)	(94,489)
Increase (Decrease) in cash and cash equivalents	(26,916)	46,325
Cash and cash equivalents at beginning of period	263,207	1,549
Cash and cash equivalents at end of period	236,291	47,874
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the three months ended March 31, 2014 and 2013 of $1,230 and $625, respectively	19,213	11,367
Supplemental disclosure of non-cash activity:
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	8,228	(1,701)
Change in capital expenditures financed through retention payable at period end	538	(697)
Change in unfunded tenant allowance	(43)	(64)
Gain (Loss) on Sale of Properties	$ 1,187	$ 5,304