Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net income	$ 52,871	$ 31,960
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	142,736	160,355
Amortization of deferred financing costs	2,063	3,377
Amortization of debt discount/(premium), net	1,108	(507)
Amortization of stock compensation costs	3,612	4,312
Shares used for employee taxes upon vesting of share awards	(879)	(2,056)
Straight-line rent income	(22,049)	(17,579)
Amortization of acquired above (below) market leases, net	(5,090)	(5,473)
Straight-line ground rent expense	66	66
Provision for doubtful accounts	573	1,276
Net gain on real estate venture transactions	(19,529)	0
Net gain on sale of interests in real estate	(114,813)	(19,692)
Net gain from remeasurement of investment in real estate ventures	0	(758)
Loss on early extinguishment of debt - deferred financing costs	13,157	0
Provision for impairment	13,069	2,508
Tax credit transaction income	0	(11,853)
Real Estate Venture loss in excess of distributions	9,945	2,579
Deferred financing obligation	(681)	(906)
Changes in assets and liabilities:
Accounts receivable	4,041	(1,008)
Other assets	(10,332)	(9,511)
Accounts payable and accrued expenses	7,163	13,819
Deferred income, gains and rent	(2,000)	(3,491)
Other liabilities	318	(2,458)
Net cash provided by operating activities	75,349	144,960
Cash flows from investing activities:
Acquisition of properties	(20,406)	(141,303)
Acquisition of property - 1031 exchange funds applied	0	(62,812)
Proceeds from the sale of properties	758,931	152,243
Sale of property - 1031 exchange funds held in escrow	0	62,800
Distribution of sale proceeds from a real estate venture	20,551	0
Issuance of mortgage note receivable	(3,365)	0
Proceeds from repayment of mortgage notes receivable	0	88,000
Capital expenditures for tenant improvements	(37,991)	(56,095)
Capital expenditures for redevelopments	(10,852)	(38,925)
Capital expenditures for developments	(147,831)	(122,380)
Advances for the purchase of tenant assets, net of repayments	275	290
Investment in unconsolidated Real Estate Ventures	(27,174)	(62,868)
Deposits for real estate	(746)	(451)
Escrowed cash	6,993	1,004
Cash distribution from unconsolidated Real Estate Ventures in excess of cumulative equity income	12,565	7,401
Leasing costs paid	(12,884)	(18,295)
Net cash provided by (used in) investing activities	538,066	(191,391)
Cash flows from financing activities:
Proceeds from mortgage notes payable	86,900	0
Repayments of mortgage notes payable	(302,514)	(10,598)
Proceeds from credit facility borrowings	195,000	0
Repayments of credit facility borrowings	(195,000)	0
Repayments of unsecured notes	(149,919)	0
Debt financing costs paid	(477)	(3,229)
Proceeds from the exercise of stock options	1,286	127
Partner contributions to consolidated real estate venture	73	1,025
Repurchase and retirement of common shares	0	(60,817)
Distributions paid to shareholders	(85,702)	(86,255)
Distributions to non-controlling interest	(697)	(692)
Net cash used in financing activities	(451,050)	(160,439)
Increase in cash and cash equivalents	162,365	(206,870)
Cash and cash equivalents at beginning of year	56,694	257,502
Cash and cash equivalents at end of period	219,059	50,632
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the nine months ended September 30, 2016 and 2015 of $10,023 and $8,764, respectively	64,046	80,720
Supplemental disclosure of non-cash activity:
Change in real estate investments related to non-cash property acquisition	0	(67,261)
Change in investments in joint venture related to non-cash property acquisition	0	67,261
Dividends and distributions declared but not paid	30,036	28,318
Change in investment in real estate ventures as a result of dispositions	2,023	0
Change in investment in real estate ventures related to non-cash disposition of property	25,165	0
Change in other liabilities from contingent consideration related to a business combination	0	1,585
Change in operating real estate from contingent consideration related to a business combination	0	(1,585)
Change in other liabilities from a deferred payment related to an asset acquisition	0	2,000
Change in operating real estate from a deferred payment related to an asset acquisition	0	(2,000)
Change in operating real estate from deconsolidation of 3141 Fairview Park Drive	44,313	0
Change in investment in real estate ventures from deconsolidation of 3141 Fairview Park Drive	(12,642)	0
Change in mortgage notes payable from deconsolidation of 3141 Fairview Park Drive	(20,582)	0
Change in other liabilities from deconsolidation of 3141 Fairview Park Drive	(12,384)	0
Change in capital expenditures financed through accounts payable at period end	(5,012)	(2,472)
Change in capital expenditures financed through retention payable at period end	2,487	6,873
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Cash flows from operating activities:
Net income	52,871	31,960
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	142,736	160,355
Amortization of deferred financing costs	2,063	3,377
Amortization of debt discount/(premium), net	1,108	(507)
Amortization of stock compensation costs	3,612	4,312
Shares used for employee taxes upon vesting of share awards	(879)	(2,056)
Straight-line rent income	(22,049)	(17,579)
Amortization of acquired above (below) market leases, net	(5,090)	(5,473)
Straight-line ground rent expense	66	66
Provision for doubtful accounts	573	1,276
Net gain on real estate venture transactions	(19,529)	0
Net gain on sale of interests in real estate	(114,813)	(19,692)
Net gain from remeasurement of investment in real estate ventures	0	(758)
Loss on early extinguishment of debt - deferred financing costs	13,157	0
Provision for impairment	13,069	2,508
Tax credit transaction income	0	(11,853)
Real Estate Venture loss in excess of distributions	9,945	2,579
Deferred financing obligation	(681)	(906)
Changes in assets and liabilities:
Accounts receivable	4,041	(1,008)
Other assets	(10,332)	(9,511)
Accounts payable and accrued expenses	7,163	13,819
Deferred income, gains and rent	(2,000)	(3,491)
Other liabilities	318	(2,458)
Net cash provided by operating activities	75,349	144,960
Cash flows from investing activities:
Acquisition of properties	(20,406)	(141,303)
Acquisition of property - 1031 exchange funds applied	0	(62,812)
Proceeds from the sale of properties	758,931	152,243
Sale of property - 1031 exchange funds held in escrow	0	62,800
Distribution of sale proceeds from a real estate venture	20,551	0
Issuance of mortgage note receivable	(3,365)	0
Proceeds from repayment of mortgage notes receivable	0	88,000
Capital expenditures for tenant improvements	(37,991)	(56,095)
Capital expenditures for redevelopments	(10,852)	(38,925)
Capital expenditures for developments	(147,831)	(122,380)
Advances for the purchase of tenant assets, net of repayments	275	290
Investment in unconsolidated Real Estate Ventures	(27,174)	(62,868)
Deposits for real estate	(746)	(451)
Escrowed cash	6,993	1,004
Cash distribution from unconsolidated Real Estate Ventures in excess of cumulative equity income	12,565	7,401
Leasing costs paid	(12,884)	(18,295)
Net cash provided by (used in) investing activities	538,066	(191,391)
Cash flows from financing activities:
Proceeds from mortgage notes payable	86,900	0
Repayments of mortgage notes payable	(302,514)	(10,598)
Proceeds from credit facility borrowings	195,000	0
Repayments of credit facility borrowings	(195,000)	0
Repayments of unsecured notes	(149,919)	0
Debt financing costs paid	(477)	(3,229)
Proceeds from the exercise of stock options	1,286	127
Partner contributions to consolidated real estate venture	73	1,025
Repurchase and retirement of common shares	0	(60,817)
Distributions paid to shareholders	(86,399)	(86,947)
Net cash used in financing activities	(451,050)	(160,439)
Increase in cash and cash equivalents	162,365	(206,870)
Cash and cash equivalents at beginning of year	56,694	257,502
Cash and cash equivalents at end of period	219,059	50,632
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the nine months ended September 30, 2016 and 2015 of $10,023 and $8,764, respectively	64,046	80,720
Supplemental disclosure of non-cash activity:
Change in real estate investments related to non-cash property acquisition	0	(67,261)
Change in investments in joint venture related to non-cash property acquisition	0	67,261
Dividends and distributions declared but not paid	30,036	28,318
Change in investment in real estate ventures as a result of dispositions	2,023	0
Change in investment in real estate ventures related to non-cash disposition of property	25,165	0
Change in other liabilities from contingent consideration related to a business combination	0	1,585
Change in operating real estate from contingent consideration related to a business combination	0	(1,585)
Change in other liabilities from a deferred payment related to an asset acquisition	0	2,000
Change in operating real estate from a deferred payment related to an asset acquisition	0	(2,000)
Change in operating real estate from deconsolidation of 3141 Fairview Park Drive	44,313	0
Change in investment in real estate ventures from deconsolidation of 3141 Fairview Park Drive	(12,642)	0
Change in mortgage notes payable from deconsolidation of 3141 Fairview Park Drive	(20,582)	0
Change in other liabilities from deconsolidation of 3141 Fairview Park Drive	(12,384)	0
Change in capital expenditures financed through accounts payable at period end	(5,012)	(2,472)
Change in capital expenditures financed through retention payable at period end	$ 2,487	$ 6,873