Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income	$ 21,271	$ 46,310
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	45,892	48,873
Amortization of deferred financing costs	634	774
Amortization of debt discount/(premium), net	362	382
Amortization of stock compensation costs	3,124	2,296
Straight-line rent income	(5,895)	(6,104)
Amortization of acquired above (below) market leases, net	(1,338)	(2,232)
Straight-line ground rent expense	22	22
Provision for doubtful accounts	707	215
Net gain on real estate venture transactions	(14,582)	(5,929)
Net gain on sale of interests in real estate	(7,323)	(115,456)
Loss on early extinguishment of debt	0	66,590
Provision for impairment	2,730	7,390
Real Estate Venture loss in excess of distributions	748	723
Deferred financing obligation	0	(253)
Changes in assets and liabilities:
Accounts receivable	(917)	246
Other assets	(10,926)	(9,193)
Accounts payable and accrued expenses	9,089	6,296
Deferred income, gains and rent	(3,333)	(2,308)
Other liabilities	(6)	552
Net cash provided by operating activities	40,259	39,194
Cash flows from investing activities:
Proceeds from the sale of properties	74,159	704,911
Proceeds from real estate venture sales	27,230	4,812
Capital expenditures for tenant improvements	(11,408)	(13,949)
Capital expenditures for redevelopments	(5,505)	(6,199)
Capital expenditures for developments	(21,156)	(54,405)
Advances for the purchase of tenant assets, net of repayments	997	360
Investment in unconsolidated Real Estate Ventures	(4,910)	(14,414)
Deposits for real estate	268	(2,275)
Escrowed cash	(32,009)	6,991
Cash distribution from unconsolidated Real Estate Ventures in excess of cumulative equity income	8,306	1,436
Leasing costs paid	(4,129)	(4,716)
Net cash provided by investing activities	31,843	622,552
Cash flows from financing activities:
Repayments of mortgage notes payable	(1,215)	(267,172)
Proceeds from credit facility borrowings	0	195,000
Repayments of credit facility borrowings	0	(195,000)
Debt financing costs paid	0	(72)
Proceeds from the exercise of stock options	0	826
Shares used for employee taxes upon vesting of share awards	(129)	(289)
Partner contributions to consolidated real estate venture	29	18
Distributions paid to shareholders	(29,815)	(28,004)
Distributions to non-controlling interest	(237)	(230)
Net cash used in financing activities	(31,367)	(294,923)
Increase in cash and cash equivalents	40,735	366,823
Cash and cash equivalents at beginning of year	193,919	56,694
Cash and cash equivalents at end of period	234,654	423,517
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the three months ended March 31, 2017 and 2016 of $1,709 and $3,671, respectively	11,268	13,656
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid	30,047	28,278
Change in investment in real estate ventures as a result of dispositions	12,549	(1,130)
Change in investment in real estate ventures related to non-cash disposition of property	0	(25,165)
Change in capital expenditures financed through accounts payable at period end	1,273	4,235
Change in capital expenditures financed through retention payable at period end	(199)	753
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Cash flows from operating activities:
Net income	21,271	46,310
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	45,892	48,873
Amortization of deferred financing costs	634	774
Amortization of debt discount/(premium), net	362	382
Amortization of stock compensation costs	3,124	2,296
Straight-line rent income	(5,895)	(6,104)
Amortization of acquired above (below) market leases, net	(1,338)	(2,232)
Straight-line ground rent expense	22	22
Provision for doubtful accounts	707	215
Net gain on real estate venture transactions	(14,582)	(5,929)
Net gain on sale of interests in real estate	(7,323)	(115,456)
Loss on early extinguishment of debt	0	66,590
Provision for impairment	2,730	7,390
Real Estate Venture loss in excess of distributions	748	723
Deferred financing obligation	0	(253)
Changes in assets and liabilities:
Accounts receivable	(917)	246
Other assets	(10,926)	(9,193)
Accounts payable and accrued expenses	9,089	6,296
Deferred income, gains and rent	(3,333)	(2,308)
Other liabilities	(6)	552
Net cash provided by operating activities	40,259	39,194
Cash flows from investing activities:
Proceeds from the sale of properties	74,159	704,911
Proceeds from real estate venture sales	27,230	4,812
Capital expenditures for tenant improvements	(11,408)	(13,949)
Capital expenditures for redevelopments	(5,505)	(6,199)
Capital expenditures for developments	(21,156)	(54,405)
Advances for the purchase of tenant assets, net of repayments	997	360
Investment in unconsolidated Real Estate Ventures	(4,910)	(14,414)
Deposits for real estate	268	(2,275)
Escrowed cash	(32,009)	6,991
Cash distribution from unconsolidated Real Estate Ventures in excess of cumulative equity income	8,306	1,436
Leasing costs paid	(4,129)	(4,716)
Net cash provided by investing activities	31,843	622,552
Cash flows from financing activities:
Repayments of mortgage notes payable	(1,215)	(267,172)
Proceeds from credit facility borrowings	0	195,000
Repayments of credit facility borrowings	0	(195,000)
Debt financing costs paid	0	(72)
Proceeds from the exercise of stock options	0	826
Shares used for employee taxes upon vesting of share awards	(129)	(289)
Partner contributions to consolidated real estate venture	29	18
Distributions paid to shareholders	(30,052)	(28,234)
Net cash used in financing activities	(31,367)	(294,923)
Increase in cash and cash equivalents	40,735	366,823
Cash and cash equivalents at beginning of year	193,919	56,694
Cash and cash equivalents at end of period	234,654	423,517
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the three months ended March 31, 2017 and 2016 of $1,709 and $3,671, respectively	11,268	13,656
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid	30,047	28,278
Change in investment in real estate ventures as a result of dispositions	12,549	(1,130)
Change in investment in real estate ventures related to non-cash disposition of property	0	(25,165)
Change in capital expenditures financed through accounts payable at period end	1,273	4,235
Change in capital expenditures financed through retention payable at period end	$ (199)	$ 753