Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income (loss)	$ 17,655	$ 13,799
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	158,738	131,631
Amortization of deferred financing costs	2,026	1,872
Amortization of debt discount/(premium), net	527	527
Amortization of stock compensation costs	6,145	5,143
Straight-line rent income	(8,287)	(10,102)
Amortization of acquired above (below) market leases, net	(7,236)	(2,313)
Ground rent expense	1,103	288
Provision for doubtful accounts	611	1,238
Net gain on real estate venture transactions	(3,594)	(37,263)
Net gain on sale of interests in real estate	(1,857)	(2,824)
Provision for impairment	0	56,865
Loss from Real Estate Ventures, net of distributions	5,134	2,811
Income tax provision	46	158
Changes in assets and liabilities:
Accounts receivable	2,086	4,165
Other assets	(13,089)	(9,831)
Accounts payable and accrued expenses	194	1,544
Deferred income, gains and rent	(3,640)	(3,461)
Other liabilities	(1,312)	290
Net cash provided by operating activities	155,250	154,537
Cash flows from investing activities:
Acquisition of properties	0	(40,240)
Proceeds from the sale of properties	41,546	16,771
Proceeds from real estate venture sales	675	42,953
Issuance of mortgage note receivable	0	(44,430)
Proceeds from repayment of mortgage notes receivable	3,341	141
Capital expenditures for tenant improvements	(53,383)	(43,142)
Capital expenditures for redevelopments	(33,905)	(31,312)
Capital expenditures for developments	(55,002)	(70,297)
Advances for the purchase of tenant assets, net of repayments	(178)	739
Investment in unconsolidated Real Estate Ventures	(253)	(646)
Deposits for real estate	(1,990)	(5,550)
Capital distributions from Real Estate Ventures	35,206	5,101
Leasing costs paid	(13,184)	(10,664)
Net cash used in investing activities	(77,127)	(180,576)
Cash flows from financing activities:
Repayments of mortgage notes payable	(5,669)	(4,972)
Proceeds from credit facility borrowings	333,000	0
Repayments of credit facility borrowings	(279,000)	0
Debt financing costs paid	0	(2,704)
Proceeds from the exercise of stock options	800	0
Proceeds from the issuance of common shares	0	416
Shares used for employee taxes upon vesting of share awards	(1,554)	(1,494)
Partner contributions to consolidated real estate venture	25	15
Partner distributions from consolidated real estate venture	0	(54)
Repurchase and retirement of common shares	(17,282)	0
Distributions paid to shareholders	(100,573)	(96,626)
Distributions to noncontrolling interest	(560)	(799)
Net cash used in financing activities	(70,813)	(106,218)
Increase (decrease) in cash and cash equivalents and restricted cash	7,310	(132,257)
Cash and cash equivalents and restricted cash at beginning of year	23,211	203,442
Cash and cash equivalents and restricted cash at end of period	30,521	71,185
Reconciliation of cash and cash equivalents and restricted cash:
Cash and cash equivalents, beginning of period	22,842	202,179
Restricted cash, beginning of period	369	1,263
Cash and cash equivalents and restricted cash at beginning of year	23,211	203,442
Cash and cash equivalents, end of period	29,925	70,360
Restricted cash, end of period	596	825
Cash and cash equivalents and restricted cash at end of period	30,521	71,185
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the nine months ended September 30, 2019 and 2018 of $2,246 and $2,578, respectively	56,455	52,888
Cash paid for income taxes	1,169	405
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid	33,759	32,492
Change in construction-in-progress related to non-cash disposition of land	0	22,625
Change in deferred income, gains and rent to the non-cash disposition of land	0	(25,462)
Change in investment in real estate ventures as a result of dispositions	3,461	(17,313)
Change in operating real estate related to a non-cash acquisition of an operating property	0	(20,653)
Change in intangible assets, net related to non-cash acquisition of an operating property	0	(3,144)
Change in acquired lease intangibles, net related to non-cash acquisition of an operating property	0	182
Change in investments in joint venture related to non-cash acquisition of property	0	(2,042)
Change in mortgage notes payable related to acquisition of an operating property	0	9,940
Change in capital expenditures financed through accounts payable at period end	(6,011)	992
Change in capital expenditures financed through retention payable at period end	(3,356)	2,352
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Cash flows from operating activities:
Net income (loss)	17,655	13,799
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	158,738	131,631
Amortization of deferred financing costs	2,026	1,872
Amortization of debt discount/(premium), net	527	527
Amortization of stock compensation costs	6,145	5,143
Straight-line rent income	(8,287)	(10,102)
Amortization of acquired above (below) market leases, net	(7,236)	(2,313)
Ground rent expense	1,103	288
Provision for doubtful accounts	611	1,238
Net gain on real estate venture transactions	(3,594)	(37,263)
Net gain on sale of interests in real estate	(1,857)	(2,824)
Provision for impairment	0	56,865
Loss from Real Estate Ventures, net of distributions	5,134	2,811
Income tax provision	46	158
Changes in assets and liabilities:
Accounts receivable	2,086	4,165
Other assets	(13,089)	(9,831)
Accounts payable and accrued expenses	194	1,544
Deferred income, gains and rent	(3,640)	(3,461)
Other liabilities	(1,312)	290
Net cash provided by operating activities	155,250	154,537
Cash flows from investing activities:
Acquisition of properties	0	(40,240)
Proceeds from the sale of properties	41,546	16,771
Proceeds from real estate venture sales	675	42,953
Issuance of mortgage note receivable	0	(44,430)
Proceeds from repayment of mortgage notes receivable	3,341	141
Capital expenditures for tenant improvements	(53,383)	(43,142)
Capital expenditures for redevelopments	(33,905)	(31,312)
Capital expenditures for developments	(55,002)	(70,297)
Advances for the purchase of tenant assets, net of repayments	(178)	739
Investment in unconsolidated Real Estate Ventures	(253)	(646)
Deposits for real estate	(1,990)	(5,550)
Capital distributions from Real Estate Ventures	35,206	5,101
Leasing costs paid	(13,184)	(10,664)
Net cash used in investing activities	(77,127)	(180,576)
Cash flows from financing activities:
Repayments of mortgage notes payable	(5,669)	(4,972)
Proceeds from credit facility borrowings	333,000	0
Repayments of credit facility borrowings	(279,000)	0
Debt financing costs paid	0	(2,704)
Proceeds from the exercise of stock options	800	0
Proceeds from the issuance of common shares	0	416
Shares used for employee taxes upon vesting of share awards	(1,554)	(1,494)
Partner contributions to consolidated real estate venture	25	15
Partner distributions from consolidated real estate venture	0	(54)
Repurchase and retirement of common shares	(17,282)	0
Distributions paid to shareholders	(101,133)	(97,425)
Net cash used in financing activities	(70,813)	(106,218)
Increase (decrease) in cash and cash equivalents and restricted cash	7,310	(132,257)
Cash and cash equivalents and restricted cash at beginning of year	23,211	203,442
Cash and cash equivalents and restricted cash at end of period	30,521	71,185
Reconciliation of cash and cash equivalents and restricted cash:
Cash and cash equivalents, beginning of period	22,842	202,179
Restricted cash, beginning of period	369	1,263
Cash and cash equivalents and restricted cash at beginning of year	23,211	203,442
Cash and cash equivalents, end of period	29,925	70,360
Restricted cash, end of period	596	825
Cash and cash equivalents and restricted cash at end of period	30,521	71,185
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the nine months ended September 30, 2019 and 2018 of $2,246 and $2,578, respectively	56,455	52,888
Cash paid for income taxes	1,169	405
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid	33,759	32,492
Change in construction-in-progress related to non-cash disposition of land	0	22,625
Change in deferred income, gains and rent to the non-cash disposition of land	0	(25,462)
Change in investment in real estate ventures as a result of dispositions	3,461	(17,313)
Change in operating real estate related to a non-cash acquisition of an operating property	0	(20,653)
Change in intangible assets, net related to non-cash acquisition of an operating property	0	(3,144)
Change in acquired lease intangibles, net related to non-cash acquisition of an operating property	0	182
Change in investments in joint venture related to non-cash acquisition of property	0	(2,042)
Change in mortgage notes payable related to acquisition of an operating property	0	9,940
Change in capital expenditures financed through accounts payable at period end	(6,011)	992
Change in capital expenditures financed through retention payable at period end	$ (3,356)	$ 2,352