Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net income	$ 57,841	$ 28,969
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	87,008	90,155
Amortization of deferred financing costs	1,254	1,230
Amortization of debt discount/(premium), net	351	718
Amortization of stock compensation costs	4,672	3,730
Straight-line rent income	(7,786)	(13,104)
Amortization of acquired above (below) market leases, net	(1,578)	(1,768)
Straight-line ground rent expense	107	44
Provision for doubtful accounts	706	1,250
Net gain on real estate venture transactions	(37,263)	(14,582)
Net gain on sale of interests in real estate	(2,824)	(8,411)
Provision for impairment	0	3,057
Income from Real Estate Ventures, net of distributions	2,693	(680)
Income tax provision	158	(239)
Changes in assets and liabilities:
Accounts receivable	(230)	136
Other assets	(3,656)	(2,262)
Accounts payable and accrued expenses	(2,312)	(2,180)
Deferred income, gains and rent	(1,375)	(4,422)
Other liabilities	(235)	1,131
Net cash provided by operating activities	97,531	82,772
Cash flows from investing activities:
Acquisition of properties	(40,240)	0
Proceeds from the sale of properties	16,771	102,083
Proceeds from real estate venture sales	42,953	27,230
Issuance of mortgage note receivable	(44,430)	0
Proceeds from repayment of mortgage notes receivable	92	0
Capital expenditures for tenant improvements	(30,072)	(19,461)
Capital expenditures for redevelopments	(10,172)	(12,501)
Capital expenditures for developments	(46,059)	(36,783)
Advances for the purchase of tenant assets, net of repayments	(253)	(1,082)
Investment in unconsolidated Real Estate Ventures	(261)	(4,982)
Deposits for real estate	(5,462)	(212)
Capital distributions from Real Estate Ventures	2,451	12,406
Leasing costs paid	(7,938)	(9,846)
Net cash (used in) provided by investing activities	(122,620)	56,852
Cash flows from financing activities:
Repayments of mortgage notes payable	(3,136)	(2,442)
Proceeds from credit facility borrowings	0	219,000
Repayments of credit facility borrowings	0	(19,000)
Repayments of unsecured notes	0	(300,000)
Redemption of preferred shares	0	(100,000)
Proceeds from the exercise of stock options	0	471
Proceeds from the issuance of common shares	416	0
Shares used for employee taxes upon vesting of share awards	(1,494)	(674)
Partner contributions to consolidated real estate venture	11	33
Partner distributions from consolidated real estate venture	(54)	0
Distributions paid to shareholders	(64,396)	(60,026)
Distributions to noncontrolling interest	(533)	(474)
Net cash used in financing activities	(69,186)	(263,112)
Increase (decrease) in cash and cash equivalents and restricted cash	(94,275)	(123,488)
Cash and cash equivalents and restricted cash at beginning of year	203,442	194,618
Cash and cash equivalents and restricted cash at end of period	109,167	71,130
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the six months ended June 30, 2018 and 2017 of $1,577 and $2,523, respectively	38,852	45,844
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid	32,493	28,376
Change in construction-in-progress related to non-cash disposition of land	22,625	0
Change in deferred income, gains and rent to the non-cash disposition of land	(25,462)	0
Change in investment in real estate ventures as a result of dispositions	(17,313)	12,549
Change in operating real estate related to a non-cash acquisition of an operating property	(20,653)	0
Change in intangible assets, net related to non-cash acquisition of an operating property	(3,144)	0
Change in acquired lease intangibles, net related to non-cash acquisition of an operating property	182	0
Change in investments in joint venture related to non-cash acquisition of property	(2,042)	0
Change in mortgage notes payable related to acquisition of an operating property	9,940	0
Change in capital expenditures financed through accounts payable at period end	(2,636)	(3,682)
Change in capital expenditures financed through retention payable at period end	(942)	534
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Cash flows from operating activities:
Net income	57,841	28,969
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	87,008	90,155
Amortization of deferred financing costs	1,254	1,230
Amortization of debt discount/(premium), net	351	718
Amortization of stock compensation costs	4,672	3,730
Straight-line rent income	(7,786)	(13,104)
Amortization of acquired above (below) market leases, net	(1,578)	(1,768)
Straight-line ground rent expense	107	44
Provision for doubtful accounts	706	1,250
Net gain on real estate venture transactions	(37,263)	(14,582)
Net gain on sale of interests in real estate	(2,824)	(8,411)
Provision for impairment	0	3,057
Income from Real Estate Ventures, net of distributions	2,693	(680)
Income tax provision	158	(239)
Changes in assets and liabilities:
Accounts receivable	(230)	136
Other assets	(3,656)	(2,262)
Accounts payable and accrued expenses	(2,312)	(2,180)
Deferred income, gains and rent	(1,375)	(4,422)
Other liabilities	(235)	1,131
Net cash provided by operating activities	97,531	82,772
Cash flows from investing activities:
Acquisition of properties	(40,240)	0
Proceeds from the sale of properties	16,771	102,083
Proceeds from real estate venture sales	42,953	27,230
Issuance of mortgage note receivable	(44,430)	0
Proceeds from repayment of mortgage notes receivable	92	0
Capital expenditures for tenant improvements	(30,072)	(19,461)
Capital expenditures for redevelopments	(10,172)	(12,501)
Capital expenditures for developments	(46,059)	(36,783)
Advances for the purchase of tenant assets, net of repayments	(253)	(1,082)
Investment in unconsolidated Real Estate Ventures	(261)	(4,982)
Deposits for real estate	(5,462)	(212)
Capital distributions from Real Estate Ventures	2,451	12,406
Leasing costs paid	(7,938)	(9,846)
Net cash (used in) provided by investing activities	(122,620)	56,852
Escrowed cash	0	0
Cash flows from financing activities:
Repayments of mortgage notes payable	(3,136)	(2,442)
Proceeds from credit facility borrowings	0	219,000
Repayments of credit facility borrowings	0	(19,000)
Repayments of unsecured notes	0	(300,000)
Redemption of preferred shares	0	(100,000)
Proceeds from the exercise of stock options	0	471
Proceeds from the issuance of common shares	416	0
Shares used for employee taxes upon vesting of share awards	(1,494)	(674)
Partner contributions to consolidated real estate venture	11	33
Partner distributions from consolidated real estate venture	(54)	0
Distributions paid to shareholders	(64,929)	(60,500)
Net cash used in financing activities	(69,186)	(263,112)
Increase (decrease) in cash and cash equivalents and restricted cash	(94,275)	(123,488)
Cash and cash equivalents and restricted cash at beginning of year	203,442	194,618
Cash and cash equivalents and restricted cash at end of period	109,167	71,130
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the six months ended June 30, 2018 and 2017 of $1,577 and $2,523, respectively	38,852	45,844
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid	32,493	28,376
Change in construction-in-progress related to non-cash disposition of land	22,625	0
Change in deferred income, gains and rent to the non-cash disposition of land	(25,462)	0
Change in investment in real estate ventures as a result of dispositions	(17,313)	12,549
Change in operating real estate related to a non-cash acquisition of an operating property	(20,653)	0
Change in intangible assets, net related to non-cash acquisition of an operating property	(3,144)	0
Change in acquired lease intangibles, net related to non-cash acquisition of an operating property	182	0
Change in investments in joint venture related to non-cash acquisition of property	(2,042)	0
Change in mortgage notes payable related to acquisition of an operating property	9,940	0
Change in capital expenditures financed through accounts payable at period end	(2,636)	(3,682)
Change in capital expenditures financed through retention payable at period end	$ (942)	$ 534