Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net income (loss)	$ 6,789	$ 12,107
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	83,128	101,781
Amortization of deferred financing costs	1,418	1,480
Amortization of debt discount/(premium), net	(975)	(788)
Amortization of stock compensation costs	4,324	4,462
Straight-line rent income	(7,472)	(4,416)
Amortization of acquired above (below) market leases, net	(2,573)	(2,617)
Ground rent expense	505	729
Provision for doubtful accounts	67	345
Net gain on sale of interests in real estate	(2,135)	(2,787)
Loss from unconsolidated real estate ventures, net of distributions	14,164	4,092
Income tax provision (benefit)	34	(226)
Changes in assets and liabilities:
Accounts receivable	2,513	(4,349)
Other assets	(2,405)	(3,315)
Accounts payable and accrued expenses	(12,431)	(4,215)
Deferred income, gains and rent	1,887	(5,418)
Other liabilities	(7,712)	3,455
Net cash provided by operating activities	79,126	100,320
Cash flows from investing activities:
Acquisition of properties	0	(11,432)
Proceeds from the sale of properties	79	21,250
Proceeds from insurance	1,250	0
Capital expenditures for tenant improvements	(20,573)	(27,834)
Capital expenditures for redevelopments	(10,005)	(14,686)
Capital expenditures for developments	(18,746)	(33,566)
Advances for the purchase of tenant assets, net of repayments	290	1,563
Investment in unconsolidated real estate ventures	(16,662)	(199)
Capital distributions from unconsolidated real estate ventures	5,151	3,575
Leasing costs paid	(9,187)	(13,998)
Net cash used in investing activities	(68,403)	(75,327)
Cash flows from financing activities:
Repayments of mortgage notes payable	0	(3,909)
Proceeds from credit facility borrowings	96,000	132,500
Repayments of credit facility borrowings	(38,000)	(71,500)
Exercise of stock options, net	(63)	47
Shares used for employee taxes upon vesting of share awards	(1,823)	(1,346)
Partner contributions to consolidated real estate venture	2,289	0
Repurchase and retirement of common shares	0	(60,000)
Redemption of limited partnership units	(2,234)	0
Distributions paid to shareholders	(65,074)	(66,107)
Distributions to noncontrolling interest	(383)	(374)
Net cash used in financing activities	(9,288)	(70,689)
Increase/(Decrease) in cash and cash equivalents and restricted cash	1,435	(45,696)
Cash and cash equivalents and restricted cash at beginning of period	47,077	91,170
Cash and cash equivalents and restricted cash at end of period	48,512	45,474
Reconciliation of cash and cash equivalents and restricted cash:
Cash and cash equivalents, beginning of period	46,344	90,499
Restricted cash, beginning of period	733	671
Cash and cash equivalents and restricted cash at beginning of period	47,077	91,170
Cash and cash equivalents, end of period	47,730	44,819
Restricted cash, end of period	782	655
Cash and cash equivalents and restricted cash at end of period	48,512	45,474
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the six months ended June 30, 2021 and 2020 of $3,734 and $2,341, respectively	36,961	42,994
Cash paid for income taxes	21	483
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid	32,727	32,747
Change in investment in real estate ventures as a result of deconsolidation	32,761	0
Change in operating real estate from deconsolidation of operating properties	(30,073)	0
Change in other assets as a result of deconsolidation of operating properties	(2,688)	0
Change in capital expenditures financed through accounts payable at period end	(653)	5,955
Change in capital expenditures financed through retention payable at period end	(2,339)	222
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Cash flows from operating activities:
Net income (loss)	6,789	12,107
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	83,128	101,781
Amortization of deferred financing costs	1,418	1,480
Amortization of debt discount/(premium), net	(975)	(788)
Amortization of stock compensation costs	4,324	4,462
Straight-line rent income	(7,472)	(4,416)
Amortization of acquired above (below) market leases, net	(2,573)	(2,617)
Ground rent expense	505	729
Provision for doubtful accounts	67	345
Net gain on sale of interests in real estate	(2,135)	(2,787)
Loss from unconsolidated real estate ventures, net of distributions	14,164	4,092
Income tax provision (benefit)	34	(226)
Changes in assets and liabilities:
Accounts receivable	2,513	(4,349)
Other assets	(2,405)	(3,315)
Accounts payable and accrued expenses	(12,431)	(4,215)
Deferred income, gains and rent	1,887	(5,418)
Other liabilities	(7,712)	3,455
Net cash provided by operating activities	79,126	100,320
Cash flows from investing activities:
Acquisition of properties	0	(11,432)
Proceeds from the sale of properties	79	21,250
Proceeds from insurance	1,250	0
Capital expenditures for tenant improvements	(20,573)	(27,834)
Capital expenditures for redevelopments	(10,005)	(14,686)
Capital expenditures for developments	(18,746)	(33,566)
Advances for the purchase of tenant assets, net of repayments	290	1,563
Investment in unconsolidated real estate ventures	(16,662)	(199)
Capital distributions from unconsolidated real estate ventures	5,151	3,575
Leasing costs paid	(9,187)	(13,998)
Net cash used in investing activities	(68,403)	(75,327)
Cash flows from financing activities:
Repayments of mortgage notes payable	0	(3,909)
Proceeds from credit facility borrowings	96,000	132,500
Repayments of credit facility borrowings	(38,000)	(71,500)
Exercise of stock options, net	(63)	47
Shares used for employee taxes upon vesting of share awards	(1,823)	(1,346)
Partner contributions to consolidated real estate venture	2,289	0
Repurchase and retirement of common shares	0	(60,000)
Redemption of limited partnership units	(2,234)	0
Distributions paid to shareholders	(65,457)	(66,481)
Net cash used in financing activities	(9,288)	(70,689)
Increase/(Decrease) in cash and cash equivalents and restricted cash	1,435	(45,696)
Cash and cash equivalents and restricted cash at beginning of period	47,077	91,170
Cash and cash equivalents and restricted cash at end of period	48,512	45,474
Reconciliation of cash and cash equivalents and restricted cash:
Cash and cash equivalents, beginning of period	46,344	90,499
Restricted cash, beginning of period	733	671
Cash and cash equivalents and restricted cash at beginning of period	47,077	91,170
Cash and cash equivalents, end of period	47,730	44,819
Restricted cash, end of period	782	655
Cash and cash equivalents and restricted cash at end of period	48,512	45,474
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the six months ended June 30, 2021 and 2020 of $3,734 and $2,341, respectively	36,961	42,994
Cash paid for income taxes	21	483
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid	32,727	32,747
Change in investment in real estate ventures as a result of deconsolidation	32,761	0
Change in operating real estate from deconsolidation of operating properties	(30,073)	0
Change in other assets as a result of deconsolidation of operating properties	(2,688)	0
Change in capital expenditures financed through accounts payable at period end	(653)	5,955
Change in capital expenditures financed through retention payable at period end	$ (2,339)	$ 222