CONSOLIDATED STATEMENTS OF CASH FLOWS - BRANDYWINE OPERATING PARTNERSHIP L.P. - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net income (loss)	$ (197,403)	$ 53,992	$ 12,366
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	188,797	177,984	178,105
Amortization of deferred financing costs	4,369	3,091	2,836
Amortization of debt discount/(premium), net	(1,056)	(5,254)	(1,951)
Amortization of stock compensation costs	9,847	8,939	7,130
Straight-line rent income	(9,270)	(13,631)	(13,485)
Amortization of acquired above (below) market leases, net	(1,256)	(2,581)	(5,377)
Straight-line ground rent expense	799	814	918
Net gain on real estate venture transactions	(181)	(26,718)	(2,973)
Total gain on sale of real estate	(8,947)	(25,684)	(3,045)
Gain (loss) on early extinguishment of debt	(138)	435	0
Provision for impairment	131,573	4,663	0
Loss from unconsolidated real estate ventures, including income distributions	77,915	23,522	26,697
Income tax provision	72	55	47
Changes in assets and liabilities:
Accounts receivable	241	1,328	2,506
Other assets	(2,831)	(1,120)	(19,325)
Accounts payable and accrued expenses	(12,928)	5,405	2,974
Deferred income, gains and rent	(86)	1,567	2,986
Other liabilities	(2,244)	2,500	465
Net cash provided by operating activities	177,273	209,307	190,874
Cash flows from investing activities:
Acquisition of properties	(7,747)	(3,446)	0
Proceeds from the sale of properties	76,804	64,210	10,303
Proceeds from insurance	0	0	1,250
Proceeds from note receivable	0	44,300	50,000
Capital expenditures for tenant improvements	(48,939)	(86,774)	(56,830)
Capital expenditures for redevelopments	(59,984)	(87,223)	(48,022)
Capital expenditures for developments	(47,537)	(89,017)	(30,269)
Advances for the purchase of tenant assets, net of repayments	(998)	(447)	270
Investment in unconsolidated real estate ventures	(85,922)	(47,428)	(31,643)
Deposits for real estate	3,500	(4,900)	(2,550)
Capital distributions from unconsolidated real estate ventures	3,790	46,898	27,028
Leasing costs paid	(7,879)	(26,762)	(19,852)
Net cash used in investing activities	(174,912)	(190,589)	(100,315)
Cash flows from financing activities:
Proceeds from credit facility borrowings	215,000	478,000	154,000
Repayments of credit facility borrowings	(303,500)	(412,500)	(131,000)
Proceeds from unsecured notes	0	350,000	0
Repayments of unsecured notes	(64,164)	(296,134)	0
Proceeds from unsecured term loan	70,000	0	0
Proceeds from secured term loan	245,000	0	0
Proceeds from construction loan	13,824	0	0
Debt financing costs paid	(4,371)	(9,875)	0
Exercise of stock options, net	0	0	(63)
Shares used for employee taxes upon vesting of share awards	(371)	(2,941)	(1,762)
Partner contributions to consolidated real estate venture	0	0	2,765
Redemption of limited partnership units	(5)	(4,006)	(2,334)
Distributions paid to preferred and common partnership units	(124,255)	(130,724)	(130,255)
Net cash provided by (used in) financing activities	46,786	(28,631)	(109,336)
Increase/(Decrease) in cash and cash equivalents and restricted cash	49,147	(9,913)	(18,777)
Cash and cash equivalents and restricted cash at beginning of year	18,387	28,300	47,077
Cash and cash equivalents and restricted cash at end of period	67,534	18,387	28,300
Reconciliation of cash and cash equivalents and restricted cash:
Cash and cash equivalents, beginning of period	17,551	27,463	46,344
Restricted cash, beginning of period	836	837	733
Cash and cash equivalents, end of period	58,319	17,551	27,463
Restricted cash, end of period	9,215	836	837
Cash and cash equivalents and restricted cash	67,534	18,387	28,300
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the years ended December 31, 2023, 2022 and 2021 of $16,410, $10,517 and $8,689 respectively	107,838	85,761	72,391
Cash paid for income taxes	550	902	785
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid	26,017	32,792	32,765
Extinguishment of debt costs accrued in financing activities	0	393	0
Change in investment in real estate ventures as a result of deconsolidation	8,595	107,057	32,761
Change in operating real estate from deconsolidation of operating properties	(7,814)	(92,009)	(30,073)
Change in other assets as a result of deconsolidation of operating properties	0	(15,048)	(2,688)
Change in capital expenditures financed through accounts payable at period end	(3,282)	(6,135)	22,744
Change in capital expenditures financed through retention payable at period end	2,715	(7,165)	(613)
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Cash flows from operating activities:
Net income (loss)	(197,403)	53,992	12,366
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	188,797	177,984	178,105
Amortization of deferred financing costs	4,369	3,091	2,836
Amortization of debt discount/(premium), net	(1,056)	(5,254)	(1,951)
Amortization of stock compensation costs	9,847	8,939	7,130
Straight-line rent income	(9,270)	(13,631)	(13,485)
Amortization of acquired above (below) market leases, net	(1,256)	(2,581)	(5,377)
Straight-line ground rent expense	799	814	918
Net gain on real estate venture transactions	(181)	(26,718)	(2,973)
Total gain on sale of real estate	(8,947)	(25,684)	(3,045)
Gain (loss) on early extinguishment of debt	(138)	435	0
Provision for impairment	131,573	4,663	0
Loss from unconsolidated real estate ventures, including income distributions	77,915	23,522	26,697
Income tax provision	72	55	47
Changes in assets and liabilities:
Accounts receivable	241	1,328	2,506
Other assets	(2,831)	(1,120)	(19,325)
Accounts payable and accrued expenses	(12,928)	5,405	2,974
Deferred income, gains and rent	(86)	1,567	2,986
Other liabilities	(2,244)	2,500	465
Net cash provided by operating activities	177,273	209,307	190,874
Cash flows from investing activities:
Acquisition of properties	(7,747)	(3,446)	0
Proceeds from the sale of properties	76,804	64,210	10,303
Proceeds from insurance	0	0	1,250
Proceeds from note receivable	0	44,300	50,000
Capital expenditures for tenant improvements	(48,939)	(86,774)	(56,830)
Capital expenditures for redevelopments	(59,984)	(87,223)	(48,022)
Capital expenditures for developments	(47,537)	(89,017)	(30,269)
Advances for the purchase of tenant assets, net of repayments	(998)	(447)	270
Investment in unconsolidated real estate ventures	(85,922)	(47,428)	(31,643)
Deposits for real estate	3,500	(4,900)	(2,550)
Capital distributions from unconsolidated real estate ventures	3,790	46,898	27,028
Leasing costs paid	(7,879)	(26,762)	(19,852)
Net cash used in investing activities	(174,912)	(190,589)	(100,315)
Cash flows from financing activities:
Proceeds from credit facility borrowings	215,000	478,000	154,000
Repayments of credit facility borrowings	(303,500)	(412,500)	(131,000)
Proceeds from unsecured notes	0	350,000	0
Repayments of unsecured notes	(64,164)	(296,134)	0
Debt financing costs paid	(4,371)	(9,875)	0
Exercise of stock options, net	0	0	(63)
Shares used for employee taxes upon vesting of share awards	(371)	(2,941)	(1,762)
Partner contributions to consolidated real estate venture	0	0	2,765
Redemption of limited partnership units	(5)	(4,006)	(2,334)
Distributions paid to preferred and common partnership units	(124,627)	(131,175)	(130,942)
Net cash provided by (used in) financing activities	46,786	(28,631)	(109,336)
Increase/(Decrease) in cash and cash equivalents and restricted cash	49,147	(9,913)	(18,777)
Cash and cash equivalents and restricted cash at beginning of year	18,387	28,300	47,077
Cash and cash equivalents and restricted cash at end of period	67,534	18,387	28,300
Reconciliation of cash and cash equivalents and restricted cash:
Cash and cash equivalents, beginning of period	17,551	27,463	46,344
Restricted cash, beginning of period	836	837	733
Cash and cash equivalents, end of period	58,319	17,551	27,463
Restricted cash, end of period	9,215	836	837
Cash and cash equivalents and restricted cash	67,534	18,387	28,300
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the years ended December 31, 2023, 2022 and 2021 of $16,410, $10,517 and $8,689 respectively	107,838	85,761	72,391
Cash paid for income taxes	550	902	785
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid	26,017	32,792	32,765
Extinguishment of debt costs accrued in financing activities	0	393	0
Change in investment in real estate ventures as a result of deconsolidation	8,595	107,057	32,761
Change in operating real estate from deconsolidation of operating properties	(7,814)	(92,009)	(30,073)
Change in other assets as a result of deconsolidation of operating properties	0	(15,048)	(2,688)
Change in capital expenditures financed through accounts payable at period end	(3,282)	(6,135)	22,744
Change in capital expenditures financed through retention payable at period end	$ 2,715	$ (7,165)	$ (613)