Brandywine Operating Partnership 10-Q 6 May 21 2021 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Mar. 31, 2021	Apr. 28, 2021
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
Document Transition Report	false
Entity Registrant Name	Brandywine Realty Trust
Entity Incorporation, State or Country Code	MD
Entity File Number	001-9106
Entity Tax Identification Number	23-2413352
Entity Address, Address Line One	2929 Walnut Street
Entity Address, Address Line Two	Suite 1700
Entity Address, City or Town	Philadelphia
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19104
City Area Code	610
Local Phone Number	325-5600
Title of 12(b) Security	Common Shares of Beneficial Interest
Trading Symbol	BDN
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		170,858,857
Entity Central Index Key	0000790816
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Amendment Flag	false
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Document Information [Line Items]
Entity Registrant Name	Brandywine Operating Partnership, L.P.
Entity Incorporation, State or Country Code	DE
Entity File Number	000-24407
Entity Tax Identification Number	23-2862640
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0001060386

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Real estate investments:
Operating properties	$ 3,386,559	$ 3,474,109
Accumulated depreciation	(900,167)	(896,561)
Right of use asset - operating leases, net	20,810	20,977
Operating real estate investments, net	2,507,202	2,598,525
Construction-in-progress	264,529	210,311
Land held for development	116,902	117,984
Prepaid leasehold interests in land held for development, net	27,762	39,185
Total real estate investments, net	2,916,395	2,966,005
Assets held for sale, net	7,349	7,349
Cash and cash equivalents	45,717	46,344
Accounts receivable	14,665	13,536
Accrued rent receivable, net of allowance of $5,080 and $5,086 as of March 31, 2021 and December 31, 2020, respectively	159,175	155,372
Investment in Real Estate Ventures	433,046	401,327
Deferred costs, net	83,839	84,856
Intangible assets, net	43,883	48,570
Other assets	185,844	176,747
Total assets	3,889,913	3,900,106
LIABILITIES AND EQUITY
Unsecured credit facility	13,000	0
Unsecured term loan, net	249,215	249,084
Unsecured senior notes, net	1,581,378	1,581,511
Accounts payable and accrued expenses	119,208	121,982
Distributions payable	32,763	32,706
Deferred income, gains and rent	22,416	21,396
Intangible liabilities, net	17,073	18,448
Lease liability - operating leases	22,810	22,758
Other liabilities	49,796	47,573
Total liabilities	2,107,659	2,095,458
Commitments and contingencies (See Note 14)
Equity:
Common Shares of Brandywine Realty Trust's beneficial interest, $0.01 par value; shares authorized 400,000,000; 170,663,251 and 170,572,964 issued and outstanding as of March 31, 2021 and December 31, 2020, respectively	1,707	1,707
Additional paid-in-capital	3,140,456	3,138,152
Deferred compensation payable in common shares	17,658	17,516
Common shares in grantor trust, 1,111,777 and 1,160,494 issued and outstanding as of March 31, 2021 and December 31, 2020, respectively	(17,658)	(17,516)
Cumulative earnings	1,117,004	1,110,083
Accumulated other comprehensive loss	(6,469)	(7,561)
Cumulative distributions	(2,480,811)	(2,448,238)
Total Brandywine Realty Trust's equity	1,771,887	1,794,143
Noncontrolling interests	10,367	10,505
Total beneficiaries' equity	1,782,254	1,804,648
Total liabilities and beneficiaries' equity	3,889,913	3,900,106
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Real estate investments:
Operating properties	3,386,559	3,474,109
Accumulated depreciation	(900,167)	(896,561)
Right of use asset - operating leases, net	20,810	20,977
Operating real estate investments, net	2,507,202	2,598,525
Construction-in-progress	264,529	210,311
Land held for development	116,902	117,984
Prepaid leasehold interests in land held for development, net	27,762	39,185
Total real estate investments, net	2,916,395	2,966,005
Assets held for sale, net	7,349	7,349
Cash and cash equivalents	45,717	46,344
Accounts receivable	14,665	13,536
Accrued rent receivable, net of allowance of $5,080 and $5,086 as of March 31, 2021 and December 31, 2020, respectively	159,175	155,372
Investment in Real Estate Ventures	433,046	401,327
Deferred costs, net	83,839	84,856
Intangible assets, net	43,883	48,570
Other assets	185,844	176,747
Total assets	3,889,913	3,900,106
LIABILITIES AND EQUITY
Unsecured credit facility	13,000	0
Unsecured term loan, net	249,215	249,084
Unsecured senior notes, net	1,581,378	1,581,511
Accounts payable and accrued expenses	119,208	121,982
Distributions payable	32,763	32,706
Deferred income, gains and rent	22,416	21,396
Intangible liabilities, net	17,073	18,448
Lease liability - operating leases	22,810	22,758
Other liabilities	49,796	47,573
Total liabilities	2,107,659	2,095,458
Commitments and contingencies (See Note 14)
Redeemable limited partnership units at redemption value; 981,634 issued and outstanding as of March 31, 2021 and December 31, 2020	12,673	11,566
Equity:
General Partnership Capital; 170,663,251 and 170,572,964 units issued and outstanding as of March 31, 2021 and December 31, 2020, respectively	1,776,347	1,800,945
Accumulated other comprehensive loss	(6,837)	(7,935)
Total Brandywine Operating Partnership, L.P.'s equity	1,769,510	1,793,010
Noncontrolling interest - consolidated real estate ventures	71	72
Total partners' equity	1,769,581	1,793,082
Total liabilities and beneficiaries' equity	$ 3,889,913	$ 3,900,106

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Accrued rent receivable, allowance	$ 5,080	$ 5,086
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, shares issued (in shares)	170,663,251	170,572,964
Common stock, shares outstanding (in shares)	170,663,251	170,572,964
Common shares in grantor trust, issued and outstanding (in shares)	1,111,777	1,160,494
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Accrued rent receivable, allowance	$ 5,080	$ 5,086
Redeemable limited partnership units issued (in units)	891,634	981,634
Redeemable limited partnership units outstanding (in units)	981,634	981,634
General partners' capital account, units issued (in units)	170,663,251	170,572,964
General partners' capital account, units outstanding (in units)	170,663,251	170,572,964

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue
Revenue	$ 120,769	$ 145,088
Operating expenses
Property operating expenses	28,935	37,461
Real estate taxes	14,761	16,787
Third party management expenses	2,978	2,662
Depreciation and amortization	40,343	52,038
General and administrative expenses	6,584	8,561
Total operating expenses	93,601	117,509
Gain on sale of real estate
Net gain on disposition of real estate	74	2,586
Net gain on sale of undepreciated real estate	1,993	0
Total gain on sale of real estate	2,067	2,586
Operating income	29,235	30,165
Other income (expense):
Interest and investment income	1,674	575
Interest expense	(16,293)	(20,009)
Interest expense - amortization of deferred financing costs	(709)	(749)
Equity in loss of Real Estate Ventures	(6,924)	(1,891)
Net income before income taxes	6,983	8,091
Income tax provision	(19)	(4)
Net income	6,964	8,087
Net income attributable to noncontrolling interests	(43)	(65)
Net income attributable to Brandywine Realty Trust	6,921	8,022
Nonforfeitable dividends allocated to unvested restricted shareholders	(146)	(131)
Net income attributable to Common Shareholders of Brandywine Realty Trust	$ 6,775	$ 7,891
Basic income per Common Share (in dollars per share)	$ 0.04	$ 0.04
Diluted income per Common Share (in dollars per share)	$ 0.04	$ 0.04
Basic weighted average shares outstanding (in shares)	170,624,741	176,069,968
Diluted weighted average shares outstanding (in shares)	171,636,120	176,653,459
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Revenue	$ 120,769	$ 145,088
Operating expenses
Property operating expenses	28,935	37,461
Real estate taxes	14,761	16,787
Third party management expenses	2,978	2,662
Depreciation and amortization	40,343	52,038
General and administrative expenses	6,584	8,561
Total operating expenses	93,601	117,509
Gain on sale of real estate
Net gain on disposition of real estate	74	2,586
Net gain on sale of undepreciated real estate	1,993	0
Total gain on sale of real estate	2,067	2,586
Operating income	29,235	30,165
Other income (expense):
Interest and investment income	1,674	575
Interest expense	(16,293)	(20,009)
Interest expense - amortization of deferred financing costs	(709)	(749)
Equity in loss of Real Estate Ventures	(6,924)	(1,891)
Net income before income taxes	6,983	8,091
Income tax provision	(19)	(4)
Net income	6,964	8,087
Net (income) loss attributable to noncontrolling interests - consolidated real estate ventures	1	(12)
Net income attributable to Brandywine Operating Partnership	6,965	8,075
Nonforfeitable dividends allocated to unvested restricted shareholders	(146)	(131)
Net income attributable to Common Shareholders of Brandywine Realty Trust	$ 6,819	$ 7,944
Basic income per Common Share (in dollars per share)	$ 0.04	$ 0.04
Diluted income per Common Share (in dollars per share)	$ 0.04	$ 0.04
Basic weighted average shares outstanding (in shares)	171,606,375	177,051,602
Diluted weighted average shares outstanding (in shares)	172,617,754	177,635,093
Rents
Revenue
Revenue	$ 113,484	$ 139,204
Rents | BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Revenue	113,484	139,204
Third party management fees, labor reimbursement and leasing
Revenue
Revenue	6,651	4,954
Third party management fees, labor reimbursement and leasing | BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Revenue	6,651	4,954
Other
Revenue
Revenue	634	930
Other | BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Revenue	$ 634	$ 930

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Net income		$ 6,964	$ 8,087
Comprehensive income (loss):
Unrealized gain (loss) on derivative financial instruments		910	(8,057)
Amortization of interest rate contracts	[1]	188	188
Total comprehensive income (loss)		1,098	(7,869)
Comprehensive income		8,062	218
Comprehensive income attributable to noncontrolling interest		(49)	(21)
Comprehensive income attributable to Brandywine Realty Trust		8,013	197
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Net income		6,964	8,087
Comprehensive income (loss):
Unrealized gain (loss) on derivative financial instruments		910	(8,057)
Amortization of interest rate contracts	[1]	188	188
Total comprehensive income (loss)		1,098	(7,869)
Comprehensive income		8,062	218
Comprehensive income attributable to noncontrolling interest		1	(12)
Comprehensive income attributable to Brandywine Realty Trust		$ 8,063	$ 206
[1]	Amounts reclassified from comprehensive income to interest expense within the Consolidated Statements of Operations.

Consolidated Statements of Bene

Consolidated Statements of Beneficiaries' Equity - USD ($) $ in Thousands	Total	Common Stock	Rabbi Trust/Deferred Compensation Shares	Additional Paid-in Capital	Common Shares in Grantor Trust	Cumulative Earnings	Accumulated Other Comprehensive Income (Loss)	Cumulative Distributions	Noncontrolling Interests
Beginning balance (in shares) at Dec. 31, 2019		176,480,095	1,105,542
Beginning balance at Dec. 31, 2019	$ 1,688,303	$ 1,766	$ 16,216	$ 3,192,158	$ (16,216)	$ 804,556	$ (2,370)	$ (2,318,233)	$ 10,426
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,087					8,022			65
Other comprehensive income (loss)	$ (7,869)						(7,825)		(44)
Repurchase and retirement of Common Shares of Beneficial Interest (in shares)	(5,644,200)	(5,644,200)
Repurchase and retirement of Common Shares of Beneficial Interest	$ (53,858)	$ (57)		(53,801)
Share-based compensation activity (in shares)		142,468	50,967
Share-based compensation activity	2,031	$ 1		2,030
Share Issuance from/(to) Deferred Compensation Plan (in shares)		(12,376)	(38,726)
Share Issuance from/(to) Deferred Compensation Plan	(193)		$ 796	(193)	(796)
Distributions declared	(32,687)							(32,500)	(187)
Ending balance (in shares) at Mar. 31, 2020		170,965,987	1,117,783
Ending balance at Mar. 31, 2020	1,603,814	$ 1,710	$ 17,012	3,140,194	(17,012)	812,578	(10,195)	(2,350,733)	10,260
Beginning balance (in shares) at Dec. 31, 2020		170,572,964	1,160,494
Beginning balance at Dec. 31, 2020	1,804,648	$ 1,707	$ 17,516	3,138,152	(17,516)	1,110,083	(7,561)	(2,448,238)	10,505
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,964					6,921			43
Other comprehensive income (loss)	1,098						1,092		6
Share-based compensation activity (in shares)		108,345	12,719
Share-based compensation activity	2,502			2,502
Share Issuance from/(to) Deferred Compensation Plan (in shares)		(18,058)	(61,436)
Share Issuance from/(to) Deferred Compensation Plan	(198)		$ 142	(198)	(142)
Distributions declared	(32,760)							(32,573)	(187)
Ending balance (in shares) at Mar. 31, 2021		170,663,251	1,111,777
Ending balance at Mar. 31, 2021	$ 1,782,254	$ 1,707	$ 17,658	$ 3,140,456	$ (17,658)	$ 1,117,004	$ (6,469)	$ (2,480,811)	$ 10,367

Consolidated Statements of Be_2

Consolidated Statements of Beneficiaries' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Stockholders' Equity [Abstract]
Distributions declared (in dollars per share)	$ 0.19	$ 0.19

Consolidated Statements of Part

Consolidated Statements of Partners' Equity - USD ($) $ in Thousands	Total	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests	BRANDYWINE OPERATING PARTNERSHIP, L.P.	BRANDYWINE OPERATING PARTNERSHIP, L.P.Accumulated Other Comprehensive Income (Loss)	BRANDYWINE OPERATING PARTNERSHIP, L.P.Noncontrolling Interests	BRANDYWINE OPERATING PARTNERSHIP, L.P.General Partner Capital
Beginning balance (in shares) at Dec. 31, 2019							176,480,095
Beginning Balance at Dec. 31, 2019				$ 1,672,915	$ (2,715)	$ 1,091	$ 1,674,539
Net income	$ 8,087		$ 65	8,087		12	$ 8,075
Other comprehensive income (loss)	(7,869)	$ (7,825)	(44)	(7,869)	(7,869)
Deferred compensation obligation (in shares)							(12,376)
Deferred compensation obligation	(193)			(193)			$ (193)
Repurchase and retirement of LP units (in shares)							(5,644,200)
Repurchase and retirement of LP units				(53,858)			$ (53,858)
Share-based compensation activity (in shares)							142,468
Share-based compensation activity	2,031			2,031			$ 2,031
Adjustment of redeemable partnership units to liquidation value at period end				5,220			5,220
Distributions declared to general partnership unitholders				(32,500)			$ (32,500)
Ending balance (in shares) at Mar. 31, 2020							170,965,987
Ending Balance at Mar. 31, 2020				1,593,833	(10,584)	1,103	$ 1,603,314
Beginning balance (in shares) at Dec. 31, 2020							170,572,964
Beginning Balance at Dec. 31, 2020				1,793,082	(7,935)	72	$ 1,800,945
Net income	6,964		43	6,964		(1)	$ 6,965
Other comprehensive income (loss)	1,098	$ 1,092	$ 6	1,098	1,098
Deferred compensation obligation (in shares)							(18,058)
Deferred compensation obligation	(198)			(198)			$ (198)
Share-based compensation activity (in shares)							108,345
Share-based compensation activity	$ 2,502			2,502			$ 2,502
Adjustment of redeemable partnership units to liquidation value at period end				(1,294)			(1,294)
Distributions declared to general partnership unitholders				(32,573)			$ (32,573)
Ending balance (in shares) at Mar. 31, 2021							170,663,251
Ending Balance at Mar. 31, 2021				$ 1,769,581	$ (6,837)	$ 71	$ 1,776,347

Consolidated Statements of Pa_2

Consolidated Statements of Partners' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
BRANDYWINE OPERATING PARTNERSHIP, L.P. | General Partner Capital
Distributions to general partnership unitholders (USD per share)	$ 0.19	$ 0.19

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net income	$ 6,964	$ 8,087
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	40,343	52,038
Amortization of deferred financing costs	709	749
Amortization of debt discount/(premium), net	(488)	(395)
Amortization of stock compensation costs	2,606	2,349
Straight-line rent income	(4,085)	(2,183)
Amortization of acquired above (below) market leases, net	(1,350)	(1,495)
Ground rent expense	297	366
Provision for doubtful accounts	253	213
Net gain on sale of interests in real estate	(2,067)	(2,586)
Loss from Real Estate Ventures, net of distributions	6,924	1,890
Income tax provision	19	4
Changes in assets and liabilities:
Accounts receivable	(939)	(1,348)
Other assets	(10,491)	(14,548)
Accounts payable and accrued expenses	4,991	(1,213)
Deferred income, gains and rent	1,302	(230)
Other liabilities	(3,812)	3,360
Net cash provided by operating activities	41,176	45,058
Cash flows from investing activities:
Acquisition of properties	0	(11,432)
Proceeds from the sale of properties	79	17,711
Capital expenditures for tenant improvements	(7,202)	(13,707)
Capital expenditures for redevelopments	(6,339)	(9,973)
Capital expenditures for developments	(6,681)	(19,426)
Advances for the purchase of tenant assets, net of repayments	(443)	585
Investment in unconsolidated Real Estate Ventures	(1,884)	0
Deposits for real estate	0	(1,011)
Capital distributions from Real Estate Ventures	3,934	0
Leasing costs paid	(2,713)	(5,315)
Net cash used in investing activities	(21,249)	(42,568)
Cash flows from financing activities:
Repayments of mortgage notes payable	0	(1,945)
Proceeds from credit facility borrowings	33,000	66,000
Repayments of credit facility borrowings	(20,000)	(16,000)
Proceeds from the exercise of stock options, net	(63)	47
Shares used for employee taxes upon vesting of share awards	(758)	(722)
Repurchase and retirement of common shares	0	(53,857)
Distributions paid to shareholders	(32,516)	(33,622)
Distributions to noncontrolling interest	(187)	(187)
Net cash used in financing activities	(20,524)	(40,286)
Decrease in cash and cash equivalents and restricted cash	(597)	(37,796)
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	46,480	53,374
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	45,717	52,702
Restricted cash, end of period	763	672
Cash and cash equivalents and restricted cash at end of period	46,480	53,374
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the three months ended March 31, 2021 and 2020 of $1,421 and $1,201, respectively	10,106	12,961
Cash paid for income taxes	1	1
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid	32,763	32,692
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	(4,827)	2,745
Change in capital expenditures financed through retention payable at period end	(3,752)	23
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Cash flows from operating activities:
Net income	6,964	8,087
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	40,343	52,038
Amortization of deferred financing costs	709	749
Amortization of debt discount/(premium), net	(488)	(395)
Amortization of stock compensation costs	2,606	2,349
Straight-line rent income	(4,085)	(2,183)
Amortization of acquired above (below) market leases, net	(1,350)	(1,495)
Ground rent expense	297	366
Provision for doubtful accounts	253	213
Net gain on sale of interests in real estate	(2,067)	(2,586)
Loss from Real Estate Ventures, net of distributions	6,924	1,890
Income tax provision	19	4
Changes in assets and liabilities:
Accounts receivable	(939)	(1,348)
Other assets	(10,491)	(14,548)
Accounts payable and accrued expenses	4,991	(1,213)
Deferred income, gains and rent	1,302	(230)
Other liabilities	(3,812)	3,360
Net cash provided by operating activities	41,176	45,058
Cash flows from investing activities:
Acquisition of properties	0	(11,432)
Proceeds from the sale of properties	79	17,711
Capital expenditures for tenant improvements	(7,202)	(13,707)
Capital expenditures for redevelopments	(6,339)	(9,973)
Capital expenditures for developments	(6,681)	(19,426)
Advances for the purchase of tenant assets, net of repayments	(443)	585
Investment in unconsolidated Real Estate Ventures	(1,884)	0
Deposits for real estate	0	(1,011)
Capital distributions from Real Estate Ventures	3,934	0
Leasing costs paid	(2,713)	(5,315)
Net cash used in investing activities	(21,249)	(42,568)
Cash flows from financing activities:
Repayments of mortgage notes payable	0	(1,945)
Proceeds from credit facility borrowings	33,000	66,000
Repayments of credit facility borrowings	(20,000)	(16,000)
Proceeds from the exercise of stock options, net	(63)	47
Shares used for employee taxes upon vesting of share awards	(758)	(722)
Repurchase and retirement of common shares	0	(53,857)
Distributions paid to shareholders	(32,703)	(33,809)
Net cash used in financing activities	(20,524)	(40,286)
Decrease in cash and cash equivalents and restricted cash	(597)	(37,796)
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	46,480	53,374
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	45,717	52,702
Restricted cash, end of period	763	672
Cash and cash equivalents and restricted cash at end of period	46,480	53,374
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the three months ended March 31, 2021 and 2020 of $1,421 and $1,201, respectively	10,106	12,961
Cash paid for income taxes	1	1
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid	32,763	32,692
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	(4,827)	2,745
Change in capital expenditures financed through retention payable at period end	$ (3,752)	$ 23

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Capitalized interest	$ 1,421	$ 1,201
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Capitalized interest	$ 1,421	$ 1,201

Organization of the Parent Comp

Organization of the Parent Company and The Operating Partnership	3 Months Ended
	Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
ORGANIZATION OF THE PARENT COMPANY AND THE OPERATING PARTNERSHIP	1. ORGANIZATION OF THE PARENT COMPANY AND THE OPERATING PARTNERSHIP Brandywine Realty Trust (the "Parent Company") is a self-administered and self-managed real estate investment trust (“REIT”) engaged in the acquisition, development, redevelopment, ownership, management, and operation of a portfolio of office and mixed-use properties. The Parent Company owns its assets and conducts its operations through Brandywine Operating Partnership, L.P. (the "Operating Partnership") and subsidiaries of the Operating Partnership. The Parent Company is the sole general partner of the Operating Partnership and, as of March 31, 2021, owned a 99.4% interest in the Operating Partnership. The Parent Company’s common shares of beneficial interest are publicly traded on the New York Stock Exchange under the ticker symbol “BDN”. The Parent Company, the Operating Partnership, and their consolidated subsidiaries are collectively referred to as the "Company". As of March 31, 2021, the Company owned 81 properties that contained an aggregate of approximately 13.7 million net rentable square feet (collectively, the “Properties”). The Company’s core portfolio of operating properties (the “Core Properties”) excludes development properties, redevelopment properties, and properties held for sale. The Properties were comprised of the following as of March 31, 2021: Number of Properties Rentable Square Feet Office properties 71 12,006,744 Mixed-use properties 5 942,334 Core Properties 76 12,949,078 Development property 1 204,000 Redevelopment properties 4 498,318 The Properties 81 13,651,396 In addition to the Properties, as of March 31, 2021, the Company owned 228.5 acres of land held for development, of which 35.2 acres were held for sale. The Company also held a leasehold interest in one land parcel totaling 0.8 acres, acquired through a prepaid 99-year ground lease, and held options to purchase approximately 55.5 additional acres of undeveloped land. As of March 31, 2021, the total potential development that this inventory of land could support under current zoning and entitlements, including the parcels under option, amounted to an estimated 13.9 million square feet, of which 0.2 million square feet relates to 35.2 acres held for sale. As of March 31, 2021, the Company also owned economic interests in ten unconsolidated real estate ventures (collectively, the “Real Estate Ventures”) (see Note 4, ''Investment in Unconsolidated Real Estate Ventures” for further information). The Properties and the properties owned by the Real Estate Ventures are located in or near Philadelphia, Pennsylvania; Austin, Texas; Metropolitan Washington, D.C.; Southern New Jersey; and Wilmington, Delaware. The Company conducts its third-party real estate management services business primarily through wholly-owned management company subsidiaries. As of March 31, 2021, the management company subsidiaries were managing properties containing an aggregate of approximately 24.5 million net rentable square feet, of which approximately 13.7 million net rentable square feet related to Properties owned by the Company and approximately 10.8 million net rentable square feet related to properties owned by third parties and Real Estate Ventures. Unless otherwise indicated, all references in this Form 10-Q to square feet represent net rentable area.

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
BASIS OF PRESENTATION	2. BASIS OF PRESENTATION Basis of Presentation The consolidated financial statements have been prepared by the Company pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) for interim financial statements. Certain information and footnote disclosures normally included in the annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP") have been condensed or omitted pursuant to such rules and regulations. In the opinion of management, all adjustments consist solely of normal recurring matters, and result in a fair statement of the financial position of the Company as of March 31, 2021, the results of its operations for the three months ended March 31, 2021 and 2020 and its cash flows for the three months ended March 31, 2021 and 2020. The results of operations for such interim periods are not necessarily indicative of the results for a full year. These consolidated financial statements should be read in conjunction with the Parent Company’s and the Operating Partnership’s consolidated financial statements and footnotes included in their combined Annual Report on Form 10-K for the year ended December 31, 2020 filed with the SEC on February 24, 2021. The consolidated balance sheet at December 31, 2020 has been derived from the audited financial statements as of that date but does not include all the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements. The Company's Annual Report on Form 10-K for the year ended December 31, 2020 contains a discussion of its significant accounting policies under Note 2, "Summary of Significant Accounting Policies" . There have been no significant changes in the Company's significant accounting policies since December 31, 2020. Recent Accounting Pronouncements In March 2020, the FASB issued ASU 2020-04 Reference Rate Reform (Topic 848) Facilitation of the Effects of Reference Rate Reform on Financial Reporting. The amendments provide practical expedients for reference rate reform related activities that impact debt, leases, derivatives and other contracts. The guidance is optional and is effective between March 12, 2020 and December 31, 2022. The guidance may be elected over time as reference rate reform activities occur. The Company continues to evaluate the impact of the guidance and may apply elections as applicable as additional changes in the market occur.

Real Estate Investments

Real Estate Investments	3 Months Ended
	Mar. 31, 2021
Real Estate [Abstract]
REAL ESTATE INVESTMENTS	3. REAL ESTATE INVESTMENTS As of March 31, 2021 and December 31, 2020, the gross carrying value of the operating properties was as follows (in thousands): March 31, 2021 December 31, 2020 Land $ 391,344 $ 407,514 Building and improvements 2,592,548 2,665,232 Tenant improvements 402,667 401,363 Total $ 3,386,559 $ 3,474,109 Dispositions On February 2, 2021, the Company contributed its investment in a 99-year prepaid leasehold interest in a one-acre land parcel held for development at 3025 JFK Boulevard in Philadelphia, Pennsylvania to a newly formed joint venture with an unaffiliated third party. The project is part of the Schuylkill Yards master development. The transaction valued the Company's investment in the project at $34.8 million and resulted in deconsolidation of the property and conversion of Brandywine Opportunity Fund, L.P. to a real estate venture ("3025 JFK Venture"). The Company recorded its investment at fair value and recognized a gain of $2.0 million in "Net gain on sale of undepreciated real estate" on the Consolidated Statements of Operations. See Note 4, "Investment in Unconsolidated Real Estate Ventures," for further information. Held for Sale

Investment in Unconsolidated Re

Investment in Unconsolidated Real Estate Ventures	3 Months Ended
	Mar. 31, 2021
Equity Method Investments and Joint Ventures [Abstract]
INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES	4. INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES As of March 31, 2021, the Company held ownership interests in ten unconsolidated real estate ventures for a net aggregate investment balance of $415.8 million, which includes a negative investment balance in one unconsolidated real estate venture of $17.2 million, reflected within "Other liabilities" on the consolidated balance sheets. As of March 31, 2021, five of the real estate ventures owned properties that contained an aggregate of approximately 8.4 million net rentable square feet of office space; two real estate ventures owned 1.4 acres of land held for development; one real estate venture owned 1.0 acres of land in active development; one real estate venture owned a mixed used tower comprised of 250 apartment units and 0.2 million net rentable square feet of office/retail space; and one real estate venture owned a residential tower that contained 321 apartment units. The Company accounts for its interests in the Real Estate Ventures, which range from 15% to 70%, using the equity method. Certain of the Real Estate Ventures are subject to specified priority allocations of distributable cash. The Company earned management fees from the Real Estate Ventures of $2.0 million and $1.1 million for the three months ended March 31, 2021 and 2020, respectively. The Company earned leasing commissions from the Real Estate Ventures of $1.3 million and $0.4 million for the three months ended March 31, 2021 and 2020, respectively. The Company had outstanding accounts receivable balances from the Real Estate Ventures of $2.1 million and $1.2 million as of March 31, 2021 and December 31, 2020, respectively. The amounts reflected in the following tables (except for the Company’s share of equity in income) are based on the financial information of the individual Real Estate Ventures. The following is a summary of the financial position of the Real Estate Ventures in which the Company held interests as of March 31, 2021 and December 31, 2020 (in thousands): March 31, 2021 December 31, 2020 Net property $ 1,550,425 $ 1,520,804 Other assets 473,771 488,805 Other liabilities 325,162 333,049 Debt, net 956,208 956,688 Equity (a) 742,826 719,872 (a) This amount does not include the effect of the basis difference between the Company's historical cost basis and the basis recorded at the real estate venture level, which is typically amortized over the life of the related assets and liabilities. Basis differentials occur from the impairment of investments, purchases of third party interests in existing real estate ventures and upon the transfer of assets that were previously owned by the Company into a real estate venture. In addition, certain acquisition, transaction and other costs may not be reflected in the net assets at the real estate venture level. The following is a summary of results of operations of the Real Estate Ventures in which the Company held interests during the three month periods ended March 31, 2021 and 2020 (in thousands): Three Months Ended March 31, 2021 2020 Revenue $ 53,357 $ 31,151 Operating expenses (28,987) (17,961) Interest expense, net (7,374) (4,989) Depreciation and amortization (24,893) (12,523) Net loss $ (7,897) $ (4,322) Ownership interest % Various Various Company's share of loss $ (6,541) $ (1,862) Basis adjustments and other (383) (29) Equity in loss of Real Estate Ventures $ (6,924) $ (1,891) 3025 JFK Venture On February 2, 2021, the Company contributed its investment in a 99-year prepaid leasehold interest in a one-acre land parcel held for development at 3025 JFK Boulevard in Philadelphia, Pennsylvania to the 3025 JFK Venture. The Company's initial investment in this real estate venture at February 2, 2021 was $34.8 million. The real estate venture was formed to develop a 570,000 square foot mixed-use building at property under the long-term ground lease. The estimated project cost is approximately $287 million, and the joint venture partner has agreed, subject to customary funding conditions, to fund up to approximately $45 million of the project costs in exchange for a 45% preferred equity interest in the venture and the Company will retain a 55% preferred equity interest. In addition to its $34.8 million credit for contribution of the leasehold interest at 3025 JFK Venture, the Company has agreed to fund an estimated $20.2 million of project costs. The foregoing capital commitment targets are predicated upon receipt by the 3025 JFK Venture of a construction loan in the approximate amount of $187.0 million and actual amounts may vary. Based on the facts and circumstances at the formation of the 3025 JFK Venture, the Company determined that the venture is not a variable interest entity. As a result, the Company used the voting interest model under the accounting standard for consolidation in order to determine whether to consolidate the 3025 JFK Venture. Based upon each member's substantive participating rights over the activities of the 3025 JFK Venture under the related agreements, the Company does not have a controlling interest in the project as the third party investor holds substantive participating rights in the property. Therefore, the Company deconsolidated the project and the venture is accounted for under the equity method of accounting. As a result, the Company measured its equity interest at fair value based on the fair value of the project. Since the Company retains a non-controlling interest in the 3025 JFK Venture and there are no other facts and circumstances that preclude sale recognition, the contribution qualifies as the sale of a nonfinancial asset under the relevant guidance.

Debt and Preferred Equity Inves

Debt and Preferred Equity Investments	3 Months Ended
	Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]
DEBT AND PREFERRED EQUITY SECURITIES	5. DEBT AND PREFERRED EQUITY INVESTMENTS As of March 31, 2021, the Company held one debt investment and one preferred equity investment in entities owning real estate assets. The Company accounts for these mandatorily redeemable investments as notes receivable, which are included within “Other assets” on the consolidated balance sheets. As of March 31, 2021, all debt and preferred equity investments were performing in accordance with their respective terms and remain on accrual status. Austin Preferred Equity Investment On December 31, 2020, the Company invested $50.0 million in exchange for a preferred equity interest in a single-purpose entity that owns two stabilized office buildings located in Austin, Texas. The preferred equity interest accrues a 9.0% annual return, compounded and paid monthly. The investment is required to be redeemed no later than December 31, 2023 (subject to a one-year extension option). 1919 Venture Note Receivable During 2018, each of the Company and the other equity partner in 1919 Venture, an unconsolidated real estate venture, provided a $44.4 million mortgage loan to 1919 Venture and, as a result, the Company recorded a $44.4 million related-party note receivable from 1919 Venture. The loan bears interest at a fixed 4.0% per annum interest rate with a scheduled maturity on June 25, 2023. 1919 Venture used the proceeds from the loans to repay its then outstanding $88.8 million construction loan.

Leases

Leases	3 Months Ended
	Mar. 31, 2021
Leases [Abstract]
LEASES	6. LEASES Lessor Accounting The table below sets forth the allocation of lease revenue between fixed contractual payments and variable lease payments for the three months ended March 31, 2021 and 2020 (in thousands): Three Months Ended March 31, Lease Revenue 2021 2020 Fixed contractual payments $ 86,380 $ 104,401 Variable lease payments 24,148 30,639 Total $ 110,528 $ 135,040

Intangible Assets and Liabiliti

Intangible Assets and Liabilities	3 Months Ended
	Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
INTANGIBLE ASSETS AND LIABILITIES	7. INTANGIBLE ASSETS AND LIABILITIES As of March 31, 2021 and December 31, 2020, the Company’s intangible assets/liabilities were comprised of the following (in thousands): March 31, 2021 Total Cost Accumulated Amortization Intangible Assets, net Intangible assets, net: In-place lease value $ 87,946 $ (44,427) $ 43,519 Tenant relationship value 1,737 (1,615) 122 Above market leases acquired 486 (244) 242 Total intangible assets, net $ 90,169 $ (46,286) $ 43,883 Total Cost Accumulated Amortization Intangible Liabilities, net Intangible liabilities, net: Below market leases acquired $ 30,736 $ (13,663) $ 17,073 December 31, 2020 Total Cost Accumulated Amortization Intangible Assets, net Intangible assets, net: In-place lease value $ 91,552 $ (43,400) $ 48,152 Tenant relationship value 2,091 (1,938) 153 Above market leases acquired 530 (265) 265 Total intangible assets, net $ 94,173 $ (45,603) $ 48,570 Total Cost Accumulated Amortization Intangible Liabilities, net Intangible liabilities, net: Below market leases acquired $ 31,263 $ (12,815) $ 18,448 As of March 31, 2021, the Company’s annual amortization for its intangible assets/liabilities, assuming no prospective early lease terminations, was as follows (dollars in thousands): Assets Liabilities 2021 (nine months remaining) $ 11,931 $ 3,576 2022 10,050 2,682 2023 7,440 1,642 2024 5,215 1,425 2025 4,027 1,148 Thereafter 5,220 6,600 Total $ 43,883 $ 17,073

Debt Obligations

Debt Obligations	3 Months Ended
	Mar. 31, 2021
Debt Disclosure [Abstract]
DEBT OBLIGATIONS	8. DEBT OBLIGATIONS The following table sets forth information regarding the Company’s consolidated debt obligations outstanding as of March 31, 2021 and December 31, 2020 (in thousands): March 31, 2021 December 31, 2020 Effective Maturity UNSECURED DEBT $600 million Unsecured Credit Facility $ 13,000 $ — LIBOR + 1.10% July 2022 Seven 250,000 $ 250,000 2.87% October 2022 $350.0M 3.95% Guaranteed Notes due 2023 350,000 350,000 3.87% February 2023 $350.0M 4.10% Guaranteed Notes due 2024 350,000 350,000 3.78% October 2024 $450.0M 3.95% Guaranteed Notes due 2027 450,000 450,000 4.03% November 2027 $350.0M 4.55% Guaranteed Notes due 2029 350,000 350,000 4.30% October 2029 Indenture IA (Preferred Trust I) 27,062 27,062 LIBOR + 1.25% March 2035 Indenture IB (Preferred Trust I) 25,774 25,774 LIBOR + 1.25% April 2035 Indenture II (Preferred Trust II) 25,774 25,774 LIBOR + 1.25% July 2035 Principal balance outstanding 1,841,610 1,828,610 Plus: original issue premium (discount), net 9,650 10,137 Less: deferred financing costs (7,667) (8,152) Total unsecured indebtedness $ 1,843,593 $ 1,830,595 The Company utilizes borrowings under its unsecured revolving credit facility (the “Unsecured Credit Facility”) for general business purposes, including to fund costs of acquisitions, developments and redevelopments of properties, fund share repurchases and repay other debt. The Unsecured Credit Facility provides for borrowings of up to $600.0 million and the per annum variable interest rate on borrowings is LIBOR plus 1.10%. The interest rate and facility fee are subject to adjustment upon a change in the Company’s unsecured debt ratings. During the three months ended March 31, 2021, the weighted-average interest rate on Unsecured Credit Facility borrowings was 1.2% resulting in a nominal amount of interest expense. The Parent Company unconditionally guarantees the unsecured debt obligations of the Operating Partnership (or is a co-borrower with the Operating Partnership) but does not by itself incur unsecured indebtedness. The Parent Company has no material assets other than its investment in the Operating Partnership. The Company was in compliance with all financial covenants as of March 31, 2021. Certain of the covenants restrict the Company’s ability to obtain alternative sources of capital. As of March 31, 2021, the aggregate scheduled principal payments on the Company's debt obligations were as follows (in thousands): 2021 (nine months remaining) $ — 2022 263,000 2023 350,000 2024 350,000 2025 — Thereafter 878,610 Total principal payments 1,841,610 Net unamortized premiums/(discounts) 9,650 Net deferred financing costs (7,667) Outstanding indebtedness $ 1,843,593

Fair Value of Financial Instrum

Fair Value of Financial Instruments	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
FAIR VALUE OF FINANCIAL INSTRUMENTS	9. FAIR VALUE OF FINANCIAL INSTRUMENTS Financial assets and liabilities recorded on the consolidated balance sheets are categorized based on the inputs to the valuation techniques as follows: • Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access; • Level 2 inputs are inputs, other than quoted prices included in Level 1, which are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals; and • Level 3 inputs are unobservable inputs for the asset or liability, which is typically based on an entity’s own assumptions, as there is little, if any, related market activity or information. The Company determined the fair values disclosed below using available market information and discounted cash flow analyses as of March 31, 2021 and December 31, 2020, respectively. The discount rate used in calculating fair value is the sum of the current risk free rate and the risk premium on the date of measurement of the instruments or obligations. Considerable judgment is necessary to interpret market data and to develop the related estimates of fair value. Accordingly, the estimates presented are not necessarily indicative of the amounts that the Company could realize upon disposition. The use of different estimates and valuation methodologies may have a material effect on the fair value amounts shown. The Company believes that the carrying amounts reflected in the consolidated balance sheets at March 31, 2021 and December 31, 2020 approximate the fair values for cash and cash equivalents, accounts receivable, other assets and liabilities, accounts payable and accrued expenses because they are short-term in duration. The following are financial instruments for which the Company’s estimates of fair value differ from the carrying amounts (in thousands): March 31, 2021 December 31, 2020 Carrying Amount (a) Fair Value Carrying Amount (a) Fair Value Unsecured notes payable $ 1,502,768 $ 1,597,295 $ 1,502,901 $ 1,607,310 Variable rate debt $ 340,825 $ 322,044 $ 327,694 $ 308,838 Notes receivable (b) $ 94,430 $ 97,076 $ 94,430 $ 97,372 (a) Net of deferred financing costs of $6.9 million and $7.2 million for unsecured notes payable and $0.8 million and $0.9 million for variable rate debt as of March 31, 2021 and December 31, 2020 (b) For further detail, refer to Note 5, ''Debt and Preferred Equity Investments." The Company used quoted market prices as of March 31, 2021 and December 31, 2020 to value the unsecured notes payable and, as such, categorized them as Level 2. The inputs utilized to determine the fair value of the Company’s mortgage notes payable and variable rate debt are categorized as Level 3. The fair value of the variable rate debt was determined using a discounted cash flow model that considered borrowing rates available to the Company for loans with similar terms and characteristics. The fair value of the mortgage notes payable was determined using a discounted cash flow model that considered the contractual interest and principal payments discounted at a blended market rate for loans with similar terms, maturities and loan-to-value. These inputs have been categorized as Level 3 because the Company considers the rates used in the valuation techniques to be unobservable. The inputs utilized to determine fair value of the Company's notes receivable are unobservable and, as such, were categorized as Level 3. Fair value was determined using a discounted cash flow model that considered the contractual interest and principal payments discounted at a blended interest rate of the notes receivable. For the Company’s level 3 financial instruments for which fair value is disclosed, an increase in the discount rate used to determine fair value would result in a decrease to the fair value. Conversely, a decrease in the discount rate would result in an increase to the fair value. Disclosure about the fair value of financial instruments is based upon pertinent information available to management as of March 31, 2021 and December 31, 2020. Although management is not aware of any factors that would significantly affect the fair value amounts, such amounts were not comprehensively revalued for purposes of these financial statements since March 31, 2021. Current estimates of fair value may differ from the amounts presented herein.

Derivative Financial Instrument

Derivative Financial Instruments	3 Months Ended
	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE FINANCIAL INSTRUMENTS	10. DERIVATIVE FINANCIAL INSTRUMENTS The following table summarizes the terms and fair values of the Company’s derivative financial instruments as of March 31, 2021 and December 31, 2020. The notional amounts provide an indication of the extent of the Company’s involvement in these instruments at that time, but do not represent exposure to credit, interest rate or market risks (amounts presented in thousands). Hedge Product Hedge Type Designation Notional Amount Strike Trade Date Maturity Date Fair value 3/31/2021 12/31/2020 3/31/2021 12/31/2020 Liabilities Swap Interest Rate Cash Flow (a) $ 250,000 $ 250,000 2.868 % October 8, 2015 October 8, 2022 $ (5,600) $ (6,627) Swap Interest Rate Cash Flow (b) — 25,774 3.300 % December 22, 2011 January 30, 2021 — (120) $ 250,000 $ 275,774 (a) Hedging unsecured variable rate debt. (b) On January 30, 2021, the interest rate hedge contract for this swap expired. The Company measures its derivative instruments at fair value and records them in “Other assets” and (“Other liabilities”) on the Company’s consolidated balance sheets. Although the Company has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties. The Company has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives. As a result, the Company has determined that the inputs utilized to determine the fair value of derivative instruments are classified in Level 2 of the fair value hierarchy. Disclosure about the fair value of derivative instruments is based upon pertinent information available to management as of March 31, 2021 and December 31, 2020. Although management is not aware of any factors that would significantly affect the fair value amounts, such amounts have not been comprehensively revalued for purposes of these financial statements since March 31, 2021. Current estimates of fair value may differ from the amounts presented herein.

Limited Partners' Non-Controlli

Limited Partners' Non-Controlling Interests in the Parent Company	3 Months Ended
	Mar. 31, 2021
Noncontrolling Interest [Abstract]
LIMITED PARTNERS' NON-CONTROLLING INTERESTS IN THE PARENT COMPANY	11. LIMITED PARTNERS' NONCONTROLLING INTERESTS IN THE PARENT COMPANY Noncontrolling interests in the Parent Company’s financial statements relate to redeemable common limited partnership interests in the Operating Partnership held by parties other than the Parent Company and properties which are consolidated but not wholly owned by the Operating Partnership. Operating Partnership The aggregate book value of the noncontrolling interests associated with the redeemable common limited partnership interests in the accompanying consolidated balance sheet of the Parent Company was $10.3 million and $10.5 million as of March 31, 2021 and December 31, 2020, respectively. Under the applicable accounting guidance, the redemption value of limited partnership units are carried at fair value. The Parent Company believes that the aggregate settlement value of these interests (based on the number of units outstanding and the closing price of the common shares on the balance sheet date) was approximately $12.7 million and $11.7 million as of March 31, 2021 and December 31, 2020, respectively.

Beneficiaries Equity of the Par

Beneficiaries Equity of the Parent Company	3 Months Ended
	Mar. 31, 2021
Equity [Abstract]
BENEFICIARIES' EQUITY OF THE PARENT COMPANY	12. BENEFICIARIES' EQUITY OF THE PARENT COMPANY Earnings per Share (EPS) The following table details the number of shares and net income used to calculate basic and diluted earnings per share (in thousands, except share and per share amounts; results may not add due to rounding): Three Months Ended March 31, 2021 2020 Basic Diluted Basic Diluted Numerator Net income $ 6,964 $ 6,964 $ 8,087 $ 8,087 Net income attributable to noncontrolling interests (43) (43) (65) (65) Nonforfeitable dividends allocated to unvested restricted shareholders (146) (146) (131) (131) Net income attributable to common shareholders $ 6,775 $ 6,775 $ 7,891 $ 7,891 Denominator Weighted-average shares outstanding 170,624,741 170,624,741 176,069,968 176,069,968 Contingent securities/Share based compensation — 1,011,379 — 583,491 Weighted-average shares outstanding 170,624,741 171,636,120 176,069,968 176,653,459 Earnings per Common Share: Net income attributable to common shareholders $ 0.04 $ 0.04 $ 0.04 $ 0.04 Redeemable common limited partnership units totaling 981,634 at March 31, 2021 and 981,634 at March 31, 2020, were excluded from the diluted earnings per share computations because they are not dilutive. Unvested restricted shares are considered participating securities which require the use of the two-class method for the computation of basic and diluted earnings per share. For the three months ended March 31, 2021 and 2020, earnings representing nonforfeitable dividends as noted in the table above were allocated to the unvested restricted shares issued to the Company’s executives and other employees under the Company's shareholder-approved long-term incentive plan. Common Shares On February 24, 2021, the Parent Company declared a distribution of $0.19 per common share, totaling $32.8 million, which was paid on April 21, 2021 to shareholders of record as of April 7, 2021. The Parent Company maintains a common share repurchase program under which the Board of Trustees has authorized the Parent Company to repurchase common shares. On January 3, 2019, the Board of Trustees authorized the repurchase of up to $150.0 million common shares from and after January 3, 2019. During the three months ended March 31, 2021, the Company did not repurchase any common shares. During the three months ended March 31, 2020, the Company repurchased and retired 5,644,200 common shares at an average price of $9.54 per share, totaling $53.9 million.

Partners' Equity Of The Parent

Partners' Equity Of The Parent Company	3 Months Ended
	Mar. 31, 2021
Equity [Abstract]
PARTNERS' EQUITY OF THE PARENT COMPANY	13. PARTNERS' EQUITY OF THE PARENT COMPANY Earnings per Common Partnership Unit The following table details the number of units and net income used to calculate basic and diluted earnings per common partnership unit (in thousands, except unit and per unit amounts; results may not add due to rounding): Three Months Ended March 31, 2021 2020 Basic Diluted Basic Diluted Numerator Net income $ 6,964 $ 6,964 $ 8,087 $ 8,087 Net (income) loss attributable to noncontrolling interests 1 1 (12) (12) Nonforfeitable dividends allocated to unvested restricted unitholders (146) (146) (131) (131) Net income attributable to common unitholders $ 6,819 $ 6,819 $ 7,944 $ 7,944 Denominator Weighted-average units outstanding 171,606,375 171,606,375 177,051,602 177,051,602 Contingent securities/Share based compensation — 1,011,379 — 583,491 Total weighted-average units outstanding 171,606,375 172,617,754 177,051,602 177,635,093 Earnings per Common Partnership Unit: Net income attributable to common unitholders 0.04 0.04 0.04 0.04 Unvested restricted units are considered participating securities which require the use of the two-class method for the computation of basic and diluted earnings per share. For the three months ended March 31, 2021 and 2020, earnings representing nonforfeitable dividends were allocated to the unvested restricted units issued to the Parent Company's executives and other employees under the Parent Company's shareholder-approved long-term incentive plan. Common Partnership Units On February 24, 2021, the Operating Partnership declared a distribution of $0.19 per common partnership unit, totaling $32.8 million, which was paid on April 21, 2021 to unitholders of record as of April 7, 2021.

Share Based Compensation

Share Based Compensation	3 Months Ended
	Mar. 31, 2021
Share-based Payment Arrangement [Abstract]
SHARE BASED COMPENSATION	14. SHARE BASED COMPENSATION Restricted Share Rights Awards As of March 31, 2021, 770,988 restricted share rights ("Restricted Share Rights") were outstanding under the Company's long term equity incentive plan. These Restricted Share Rights vest over one The following table summarizes the Company’s Restricted Share Rights activity during the three months ended March 31, 2021: Shares Weighted Average Grant Date Fair Value Non-vested at January 1, 2021 488,735 $ 15.19 Granted 301,545 $ 12.58 Vested (17,734) $ 14.96 Forfeited (1,558) $ 14.99 Non-vested at March 31, 2021 770,988 $ 14.18 On March 4, 2021, the Compensation Committee of the Parent Company’s Board of Trustees awarded to officers of the Company an aggregate of 252,278 Restricted Share Rights, which vest over three years from the grant date. Each Restricted Share Right entitles the holder to one common share upon settlement. The Parent Company pays dividend equivalents on the Restricted Share Rights prior to the settlement date. Vesting and/or settlement would accelerate if the recipient of the award were to die, become disabled or, in the case of certain of such Restricted Share Rights, retire in a qualifying retirement prior to the vesting or settlement date. Qualifying retirement generally means the recipient’s voluntary termination of employment after reaching at least age 57 and accumulating at least 15 years of service with the Company. In addition, vesting would also accelerate if the Parent Company were to undergo a change of control and, on or before the first anniversary of the change of control, the recipient’s employment were to cease due to a termination without cause or resignation with good reason. The Restricted Share Rights granted in 2021, 2020, and 2019 to certain senior executives include an “outperformance feature” whereby additional shares may be earned, up to 200% of the shares subject to the basic award, based on the Company’s achievement of earnings-based targets and development, or investment, based targets during a three-year performance period with an additional two years to fully vest. In addition to the basic award, up to an aggregate of 388,840, 316,236, and 228,858 shares may be awarded under the outperformance feature for the 2021, 2020, and 2019 awards, respectively, to those senior officers whose Restricted Share Rights awards include the "outperformance feature." As of March 31, 2021, the Company has recognized a nominal amount of compensation expense related to the outperformance feature for the 2021 award, has not recognized any compensation expense related to the outperformance feature for the 2020 award and has recognized $0.2 million related to the outperformance feature for the 2019 award. The Company will continue to evaluate progression towards achievement of the performance metrics on a quarterly basis and recognize compensation expense for the outperformance feature of these awards should it be determined that achievement of these metrics is probable. In addition, on February 23, 2021, the Compensation Committee awarded non-officer employees an aggregate of 49,267 Restricted Share Rights that generally vest in three equal annual installments. Vesting of these awards is subject to acceleration upon death, disability or termination without cause within one year following a change of control. In accordance with the accounting standard for share-based compensation, the Company amortizes share-based compensation costs through the qualifying retirement dates for those executives and Trustees who meet the conditions for qualifying retirement during the scheduled vesting period and whose award agreements provide for vesting upon a qualifying retirement. Restricted Performance Share Units Plan The Compensation Committee of the Parent Company’s Board of Trustees has granted performance share-based awards (referred to as Restricted Performance Share Units, or RPSUs) to officers of the Parent Company. The RPSUs are settled in common shares, with the number of common shares issuable in settlement determined based on the Company’s total shareholder return over specified measurement periods compared to total shareholder returns of comparative groups over the measurement periods. The table below presents certain information as to unvested RPSU awards. RPSU Grant Date 2/21/2019 3/5/2020 3/5/2021 Total (Amounts below in shares, unless otherwise noted) Non-vested at January 1, 2021 206,069 319,600 — 525,669 Granted — — 380,957 380,957 Non-vested at March 31, 2021 206,069 319,600 380,957 906,626 Measurement Period Commencement Date 1/1/2019 1/1/2020 1/1/2021 Measurement Period End Date 12/31/2021 12/31/2022 12/31/2023 Granted 213,728 319,600 380,957 Fair Value of Units on Grant Date (in thousands) $ 4,627 $ 5,389 $ 6,389 The Company values each RPSU on its grant date using a Monte Carlo simulation. The fair values of each award are being amortized over the three year performance period. During the performance period, dividend equivalents are credited as additional RPSUs, subject to the same terms and conditions as the original RPSUs. The performance period will be abbreviated and the determination and delivery of earned shares will be accelerated in the event of a change in control or if the recipient of the award were to die, become disabled or retire in a qualifying retirement prior to the end of the otherwise applicable three year performance period; provided that, in the case of qualifying retirement for the March 2021 and 2020 grants, the number of shares deliverable will be pro-rated based on the portion of the performance period actually worked before retirement. In accordance with the accounting standard for share-based compensation, the Company amortizes stock-based compensation costs for the February 2019 grant through the qualifying retirement date for those executives who meet the conditions for qualifying retirement during the scheduled vesting period. For the three months ended March 31, 2021, the Company recognized amortization of the 2020, 2019 and 2018 RPSU awards of $0.8 million, of which $0.1 million was capitalized consistent with the Company’s policies for capitalizing eligible portions of employee compensation. For the three months ended March 31, 2020, amortization for the 2019, 2018 and 2017 RPSU awards was $0.6 million, of which $0.1 million was capitalized consistent with the Company’s policies for capitalizing eligible portions of employee compensation. The remaining compensation expense to be recognized with respect to the non-vested RPSUs at March 31, 2021 was approximately $10.0 million and is expected to be recognized over a weighted average remaining vesting period of 2.29 years. The Company issued 82,513 common shares on February 1, 2021 in settlement of RPSUs that had been awarded on February 28, 2018 (with a three-year measurement period ended December 31, 2020 ). Holders of these RPSUs also received a cash dividend of $0.19 per share for these common shares on January 20, 2021.

Segment Information

Segment Information	3 Months Ended
	Mar. 31, 2021
Segment Reporting [Abstract]
SEGMENT INFORMATION	15. SEGMENT INFORMATION As of March 31, 2021, the Company owns and manages properties within five segments: (1) Philadelphia Central Business District ("Philadelphia CBD"), (2) Pennsylvania Suburbs, (3) Austin, Texas (4) Metropolitan Washington, D.C. and (5) Other. The Philadelphia CBD segment includes properties located in the City of Philadelphia, Pennsylvania. The Pennsylvania Suburbs segment includes properties in Chester, Delaware, and Montgomery counties in the Philadelphia suburbs. The Austin, Texas segment includes properties in the City of Austin, Texas. The Metropolitan Washington, D.C. segment includes properties in the District of Columbia, Northern Virginia and Southern Maryland. The Other segment includes properties located in Camden County, New Jersey and New Castle County, Delaware. In addition to the five segments, the corporate group is responsible for cash and investment management, development of certain real estate properties during the construction period, and certain other general support functions. Land held for development and construction in progress is transferred to operating properties by region upon completion of the associated construction or project. The following tables provide selected asset information and results of operations of the Company's reportable segments (in thousands): Real estate investments, at cost: March 31, 2021 December 31, 2020 Philadelphia CBD $ 1,429,695 $ 1,433,927 Pennsylvania Suburbs 870,403 871,530 Austin, Texas 728,702 728,741 Metropolitan Washington, D.C. 270,582 352,794 Other 87,177 87,117 Operating Properties $ 3,386,559 $ 3,474,109 Corporate Right of use asset - operating leases, net $ 20,810 $ 20,977 Construction-in-progress $ 264,529 $ 210,311 Land held for development $ 116,902 $ 117,984 Prepaid leasehold interests in land held for development, net $ 27,762 $ 39,185 Net operating income: Three Months Ended March 31, 2021 2020 Total revenue Operating expenses (a) Net operating income Total revenue Operating expenses (a) Net operating income (loss) Philadelphia CBD $ 51,227 $ (17,411) $ 33,816 $ 65,915 $ (24,198) $ 41,717 Pennsylvania Suburbs 31,740 (10,694) 21,046 37,237 (12,678) 24,559 Austin, Texas 26,175 (9,720) 16,455 26,581 (10,145) 16,436 Metropolitan Washington, D.C. 4,675 (4,199) 476 10,754 (5,512) 5,242 Other 3,213 (2,282) 931 3,652 (2,693) 959 Corporate 3,739 (2,368) 1,371 949 (1,684) (735) Operating properties $ 120,769 $ (46,674) $ 74,095 $ 145,088 $ (56,910) $ 88,178 (a) Includes property operating expenses, real estate taxes and third party management expense. Unconsolidated real estate ventures: Investment in real estate ventures Equity in income (loss) of real estate venture As of Three Months Ended March 31, March 31, 2021 December 31, 2020 2021 2020 Philadelphia CBD $ 300,694 $ 268,562 $ (4,279) $ 78 Metropolitan Washington, D.C. 99,617 99,769 (417) (449) Mid-Atlantic Office JV 32,735 32,996 207 — MAP Venture (17,223) (11,516) (2,435) (1,520) Total $ 415,823 $ 389,811 $ (6,924) $ (1,891) Net operating income (“NOI”) is a non-GAAP financial measure, which we define as total revenue less property operating expenses, real estate taxes and third party management expenses. Property operating expenses that are included in determining NOI consist of costs that are necessary and allocable to our operating properties such as utilities, property-level salaries, repairs and maintenance, property insurance and management fees. General and administrative expenses that are not reflected in NOI primarily consist of corporate-level salaries, amortization of share awards and professional fees that are incurred as part of corporate office management. NOI presented by the Company may not be comparable to NOI reported by other companies that define NOI differently. NOI is the primary measure that is used by the Company’s management to evaluate the operating performance of the Company’s real estate assets by segment. The Company believes NOI provides useful information to investors regarding the financial condition and results of operations because it reflects only those income and expense items that are incurred at the property level. While NOI is a relevant and widely used measure of operating performance of real estate investment trusts, it does not represent cash flow from operations or net income as defined by GAAP and should not be considered as an alternative to those measures in evaluating our liquidity or operating performance. NOI does not reflect interest expenses, real estate impairment losses, depreciation and amortization costs, capital expenditures and leasing costs. The Company believes that net income (loss), as defined by GAAP, is the most appropriate earnings measure. The following is a reconciliation of consolidated net income, as defined by GAAP, to consolidated NOI, (in thousands): Three Months Ended March 31, 2021 2020 Net income $ 6,964 $ 8,087 Plus: Interest expense 16,293 20,009 Interest expense - amortization of deferred financing costs 709 749 Depreciation and amortization 40,343 52,038 General and administrative expenses 6,584 8,561 Equity in loss of Real Estate Ventures 6,924 1,891 Less: Interest and investment income 1,674 575 Income tax provision (19) (4) Net gain on disposition of real estate 74 2,586 Net gain on sale of undepreciated real estate 1,993 — Consolidated net operating income $ 74,095 $ 88,178

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	16. COMMITMENTS AND CONTINGENCIES Legal Proceedings The Company is involved from time to time in litigation on various matters, including disputes with tenants, vendors and disputes arising out of agreements to purchase or sell properties. Given the nature of the Company’s business activities, these lawsuits are considered routine to the conduct of its business. The result of any particular lawsuit cannot be predicted, because of the very nature of litigation, the litigation process and its adversarial nature, and the jury system. The Company will establish reserves for specific legal proceedings when it determines that the likelihood of an unfavorable outcome is probable and when the amount of loss is reasonably estimable. The Company does not expect that the liabilities, if any, that may ultimately result from such legal actions will have a material adverse effect on the consolidated financial position, results of operations or cash flows of the Company. Environmental As an owner of real estate, the Company is subject to various environmental laws of federal, state, and local governments. The Company’s compliance with existing laws has not had a material adverse effect on its financial condition and results of operations, and the Company does not believe it will have a material adverse effect in the future. However, the Company cannot predict the impact of unforeseen environmental contingencies or new or changed laws or regulations on its current Properties or on properties that the Company may acquire. Debt Guarantees As of March 31, 2021, the Company’s Real Estate Ventures had aggregate indebtedness of $961.9 million. These loans are generally mortgage or construction loans, most of which are nonrecourse to the Company, except for customary recourse carve-outs. As of March 31, 2021, the $150.0 million construction loan obtained by 4040 Wilson, located in Arlington, Virginia, for which the Company has a payment guarantee up to $41.3 million, is recourse to the Company. In addition, during construction undertaken by the Real Estate Ventures, including 4040 Wilson, the Company has provided, and expects to continue to provide, cost overrun and completion guarantees, as well as customary environmental indemnities and guarantees of customary exceptions to nonrecourse provisions in loan agreements. In the agreement with its partner in the 3025 JFK Venture, the Company agreed to provide cost overrun and completion guaranties for the project under development. Impact of Natural Disasters and Casualty The Company carries liability insurance to mitigate its exposure to certain losses, including those relating to property damage. The Company records the estimated amount of expected insurance proceeds for property damage and other losses incurred as an asset (typically a receivable from the insurer) and income up to the amount of the losses incurred when receipt of insurance proceeds is deemed probable. Any amount of insurance recovery in excess of the amount of the losses is considered a gain contingency and is not recorded until the proceeds are received. In February 2021, one of the Company's properties in Austin, Texas sustained damage from the winter storms and resulting power grid failures. As a result of the damage, during the three months ended March 31, 2021, the Company recorded a fixed asset write-off totaling $1.2 million. During the three months ended March 31, 2021, the Company has recorded an estimated $6.4 million of restoration costs, which are included in Accounts payable and accrued expenses on the consolidated balance sheets. During the three months ended March 31, 2021, the Company has received $4.0 million of insurance proceeds and recognized an insurance receivable of $3.6 million, which is included in Other assets on the consolidated balance sheets. Other Commitments or Contingencies In connection with the Schuylkill Yards Project, the Company entered into a neighborhood engagement program and, as of March 31, 2021, had $7.6 million of future fixed contractual obligations. The Company also committed to fund additional contributions under the program. As of March 31, 2021, the Company estimates that these additional contributions, which are not fixed under the terms of agreement, will be $2.5 million. In connection with the formation of the Commerce Square Venture, the Company has committed to investing an additional $20.0 million of preferred equity in the properties on a pari passu basis with its joint venture partner of which $2.1 million has been contributed by the Company as of March 31, 2021. The Company invests in its properties and regularly incurs capital expenditures in the ordinary course of business to maintain the properties. The Company believes that such expenditures enhance its competitiveness. The Company also enters into construction, utility and service contracts in the ordinary course of business which may extend beyond one year. These contracts typically provide for cancellation with insignificant or no cancellation penalties.

Basis of Presentation (Policies

Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The consolidated financial statements have been prepared by the Company pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) for interim financial statements. Certain information and footnote disclosures normally included in the annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP") have been condensed or omitted pursuant to such rules and regulations. In the opinion of management, all adjustments consist solely of normal recurring matters, and result in a fair statement of the financial position of the Company as of March 31, 2021, the results of its operations for the three months ended March 31, 2021 and 2020 and its cash flows for the three months ended March 31, 2021 and 2020. The results of operations for such interim periods are not necessarily indicative of the results for a full year. These consolidated financial statements should be read in conjunction with the Parent Company’s and the Operating Partnership’s consolidated financial statements and footnotes included in their combined Annual Report on Form 10-K for the year ended December 31, 2020 filed with the SEC on February 24, 2021. The consolidated balance sheet at December 31, 2020 has been derived from the audited financial statements as of that date but does not include all the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements. The Company's Annual Report on Form 10-K for the year ended December 31, 2020 contains a discussion of its significant accounting policies under Note 2, "Summary of Significant Accounting Policies" . There have been no significant changes in the Company's significant accounting policies since December 31, 2020.
Adoption of New Accounting Guidance	Recent Accounting Pronouncements In March 2020, the FASB issued ASU 2020-04 Reference Rate Reform (Topic 848) Facilitation of the Effects of Reference Rate Reform on Financial Reporting. The amendments provide practical expedients for reference rate reform related activities that impact debt, leases, derivatives and other contracts. The guidance is optional and is effective between March 12, 2020 and December 31, 2022. The guidance may be elected over time as reference rate reform activities occur. The Company continues to evaluate the impact of the guidance and may apply elections as applicable as additional changes in the market occur.

Organization of the Parent Co_2

Organization of the Parent Company and The Operating Partnership (Tables)	3 Months Ended
	Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Core Portfolio of Operating Properties and Excludes Development, Redevelopment and Held for Sale	The Company’s core portfolio of operating properties (the “Core Properties”) excludes development properties, redevelopment properties, and properties held for sale. The Properties were comprised of the following as of March 31, 2021: Number of Properties Rentable Square Feet Office properties 71 12,006,744 Mixed-use properties 5 942,334 Core Properties 76 12,949,078 Development property 1 204,000 Redevelopment properties 4 498,318 The Properties 81 13,651,396

Real Estate Investments (Tables

Real Estate Investments (Tables)	3 Months Ended
	Mar. 31, 2021
Real Estate [Abstract]
Gross Carrying Value of Operating Properties	As of March 31, 2021 and December 31, 2020, the gross carrying value of the operating properties was as follows (in thousands): March 31, 2021 December 31, 2020 Land $ 391,344 $ 407,514 Building and improvements 2,592,548 2,665,232 Tenant improvements 402,667 401,363 Total $ 3,386,559 $ 3,474,109

Investment in Unconsolidated _2

Investment in Unconsolidated Real Estate Ventures (Tables)	3 Months Ended
	Mar. 31, 2021
Equity Method Investments and Joint Ventures [Abstract]
Summary of Financial Position of Real Estate Ventures	The following is a summary of the financial position of the Real Estate Ventures in which the Company held interests as of March 31, 2021 and December 31, 2020 (in thousands): March 31, 2021 December 31, 2020 Net property $ 1,550,425 $ 1,520,804 Other assets 473,771 488,805 Other liabilities 325,162 333,049 Debt, net 956,208 956,688 Equity (a) 742,826 719,872 (a) This amount does not include the effect of the basis difference between the Company's historical cost basis and the basis recorded at the real estate venture level, which is typically amortized over the life of the related assets and liabilities. Basis differentials occur from the impairment of investments, purchases of third party interests in existing real estate ventures and upon the transfer of assets that were previously owned by the Company into a real estate venture. In addition, certain acquisition, transaction and other costs may not be reflected in the net assets at the real estate venture level.
Investment in Real Estate Ventures and Share of Real Estate Ventures' Income (Loss)	The following is a summary of results of operations of the Real Estate Ventures in which the Company held interests during the three month periods ended March 31, 2021 and 2020 (in thousands): Three Months Ended March 31, 2021 2020 Revenue $ 53,357 $ 31,151 Operating expenses (28,987) (17,961) Interest expense, net (7,374) (4,989) Depreciation and amortization (24,893) (12,523) Net loss $ (7,897) $ (4,322) Ownership interest % Various Various Company's share of loss $ (6,541) $ (1,862) Basis adjustments and other (383) (29) Equity in loss of Real Estate Ventures $ (6,924) $ (1,891)

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2021
Leases [Abstract]
Schedule of Lease Income	The table below sets forth the allocation of lease revenue between fixed contractual payments and variable lease payments for the three months ended March 31, 2021 and 2020 (in thousands): Three Months Ended March 31, Lease Revenue 2021 2020 Fixed contractual payments $ 86,380 $ 104,401 Variable lease payments 24,148 30,639 Total $ 110,528 $ 135,040

Intangible Assets and Liabili_2

Intangible Assets and Liabilities (Tables)	3 Months Ended
	Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Intangible Assets and Liabilities	As of March 31, 2021 and December 31, 2020, the Company’s intangible assets/liabilities were comprised of the following (in thousands): March 31, 2021 Total Cost Accumulated Amortization Intangible Assets, net Intangible assets, net: In-place lease value $ 87,946 $ (44,427) $ 43,519 Tenant relationship value 1,737 (1,615) 122 Above market leases acquired 486 (244) 242 Total intangible assets, net $ 90,169 $ (46,286) $ 43,883 Total Cost Accumulated Amortization Intangible Liabilities, net Intangible liabilities, net: Below market leases acquired $ 30,736 $ (13,663) $ 17,073 December 31, 2020 Total Cost Accumulated Amortization Intangible Assets, net Intangible assets, net: In-place lease value $ 91,552 $ (43,400) $ 48,152 Tenant relationship value 2,091 (1,938) 153 Above market leases acquired 530 (265) 265 Total intangible assets, net $ 94,173 $ (45,603) $ 48,570 Total Cost Accumulated Amortization Intangible Liabilities, net Intangible liabilities, net: Below market leases acquired $ 31,263 $ (12,815) $ 18,448
Summary of Amortization for Intangible Assets and Liabilities	As of March 31, 2021, the Company’s annual amortization for its intangible assets/liabilities, assuming no prospective early lease terminations, was as follows (dollars in thousands): Assets Liabilities 2021 (nine months remaining) $ 11,931 $ 3,576 2022 10,050 2,682 2023 7,440 1,642 2024 5,215 1,425 2025 4,027 1,148 Thereafter 5,220 6,600 Total $ 43,883 $ 17,073

Debt Obligations (Tables)

Debt Obligations (Tables)	3 Months Ended
	Mar. 31, 2021
Debt Disclosure [Abstract]
Consolidated debt obligations	The following table sets forth information regarding the Company’s consolidated debt obligations outstanding as of March 31, 2021 and December 31, 2020 (in thousands): March 31, 2021 December 31, 2020 Effective Maturity UNSECURED DEBT $600 million Unsecured Credit Facility $ 13,000 $ — LIBOR + 1.10% July 2022 Seven 250,000 $ 250,000 2.87% October 2022 $350.0M 3.95% Guaranteed Notes due 2023 350,000 350,000 3.87% February 2023 $350.0M 4.10% Guaranteed Notes due 2024 350,000 350,000 3.78% October 2024 $450.0M 3.95% Guaranteed Notes due 2027 450,000 450,000 4.03% November 2027 $350.0M 4.55% Guaranteed Notes due 2029 350,000 350,000 4.30% October 2029 Indenture IA (Preferred Trust I) 27,062 27,062 LIBOR + 1.25% March 2035 Indenture IB (Preferred Trust I) 25,774 25,774 LIBOR + 1.25% April 2035 Indenture II (Preferred Trust II) 25,774 25,774 LIBOR + 1.25% July 2035 Principal balance outstanding 1,841,610 1,828,610 Plus: original issue premium (discount), net 9,650 10,137 Less: deferred financing costs (7,667) (8,152) Total unsecured indebtedness $ 1,843,593 $ 1,830,595
Schedule of maturities of long-term debt	As of March 31, 2021, the aggregate scheduled principal payments on the Company's debt obligations were as follows (in thousands): 2021 (nine months remaining) $ — 2022 263,000 2023 350,000 2024 350,000 2025 — Thereafter 878,610 Total principal payments 1,841,610 Net unamortized premiums/(discounts) 9,650 Net deferred financing costs (7,667) Outstanding indebtedness $ 1,843,593

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Schedule of Financial Instruments with Fair Values Different from their Carrying Amount	The following are financial instruments for which the Company’s estimates of fair value differ from the carrying amounts (in thousands): March 31, 2021 December 31, 2020 Carrying Amount (a) Fair Value Carrying Amount (a) Fair Value Unsecured notes payable $ 1,502,768 $ 1,597,295 $ 1,502,901 $ 1,607,310 Variable rate debt $ 340,825 $ 322,044 $ 327,694 $ 308,838 Notes receivable (b) $ 94,430 $ 97,076 $ 94,430 $ 97,372 (a) Net of deferred financing costs of $6.9 million and $7.2 million for unsecured notes payable and $0.8 million and $0.9 million for variable rate debt as of March 31, 2021 and December 31, 2020

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The following table summarizes the terms and fair values of the Company’s derivative financial instruments as of March 31, 2021 and December 31, 2020. The notional amounts provide an indication of the extent of the Company’s involvement in these instruments at that time, but do not represent exposure to credit, interest rate or market risks (amounts presented in thousands). Hedge Product Hedge Type Designation Notional Amount Strike Trade Date Maturity Date Fair value 3/31/2021 12/31/2020 3/31/2021 12/31/2020 Liabilities Swap Interest Rate Cash Flow (a) $ 250,000 $ 250,000 2.868 % October 8, 2015 October 8, 2022 $ (5,600) $ (6,627) Swap Interest Rate Cash Flow (b) — 25,774 3.300 % December 22, 2011 January 30, 2021 — (120) $ 250,000 $ 275,774 (a) Hedging unsecured variable rate debt. (b) On January 30, 2021, the interest rate hedge contract for this swap expired.

Beneficiaries Equity of the P_2

Beneficiaries Equity of the Parent Company (Tables)	3 Months Ended
	Mar. 31, 2021
Equity [Abstract]
Earnings Per Share (EPS), Basic and Diluted	The following table details the number of shares and net income used to calculate basic and diluted earnings per share (in thousands, except share and per share amounts; results may not add due to rounding): Three Months Ended March 31, 2021 2020 Basic Diluted Basic Diluted Numerator Net income $ 6,964 $ 6,964 $ 8,087 $ 8,087 Net income attributable to noncontrolling interests (43) (43) (65) (65) Nonforfeitable dividends allocated to unvested restricted shareholders (146) (146) (131) (131) Net income attributable to common shareholders $ 6,775 $ 6,775 $ 7,891 $ 7,891 Denominator Weighted-average shares outstanding 170,624,741 170,624,741 176,069,968 176,069,968 Contingent securities/Share based compensation — 1,011,379 — 583,491 Weighted-average shares outstanding 170,624,741 171,636,120 176,069,968 176,653,459 Earnings per Common Share: Net income attributable to common shareholders $ 0.04 $ 0.04 $ 0.04 $ 0.04

Partners' Equity Of The Paren_2

Partners' Equity Of The Parent Company (Tables)	3 Months Ended
	Mar. 31, 2021
Earnings Per Share (EPS), Basic and Diluted	The following table details the number of shares and net income used to calculate basic and diluted earnings per share (in thousands, except share and per share amounts; results may not add due to rounding): Three Months Ended March 31, 2021 2020 Basic Diluted Basic Diluted Numerator Net income $ 6,964 $ 6,964 $ 8,087 $ 8,087 Net income attributable to noncontrolling interests (43) (43) (65) (65) Nonforfeitable dividends allocated to unvested restricted shareholders (146) (146) (131) (131) Net income attributable to common shareholders $ 6,775 $ 6,775 $ 7,891 $ 7,891 Denominator Weighted-average shares outstanding 170,624,741 170,624,741 176,069,968 176,069,968 Contingent securities/Share based compensation — 1,011,379 — 583,491 Weighted-average shares outstanding 170,624,741 171,636,120 176,069,968 176,653,459 Earnings per Common Share: Net income attributable to common shareholders $ 0.04 $ 0.04 $ 0.04 $ 0.04
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Earnings Per Share (EPS), Basic and Diluted	The following table details the number of units and net income used to calculate basic and diluted earnings per common partnership unit (in thousands, except unit and per unit amounts; results may not add due to rounding): Three Months Ended March 31, 2021 2020 Basic Diluted Basic Diluted Numerator Net income $ 6,964 $ 6,964 $ 8,087 $ 8,087 Net (income) loss attributable to noncontrolling interests 1 1 (12) (12) Nonforfeitable dividends allocated to unvested restricted unitholders (146) (146) (131) (131) Net income attributable to common unitholders $ 6,819 $ 6,819 $ 7,944 $ 7,944 Denominator Weighted-average units outstanding 171,606,375 171,606,375 177,051,602 177,051,602 Contingent securities/Share based compensation — 1,011,379 — 583,491 Total weighted-average units outstanding 171,606,375 172,617,754 177,051,602 177,635,093 Earnings per Common Partnership Unit: Net income attributable to common unitholders 0.04 0.04 0.04 0.04

Share Based Compensation (Table

Share Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2021
Share-based Payment Arrangement [Abstract]
Company's Restricted Share Activity	The following table summarizes the Company’s Restricted Share Rights activity during the three months ended March 31, 2021: Shares Weighted Average Grant Date Fair Value Non-vested at January 1, 2021 488,735 $ 15.19 Granted 301,545 $ 12.58 Vested (17,734) $ 14.96 Forfeited (1,558) $ 14.99 Non-vested at March 31, 2021 770,988 $ 14.18
Schedule of Restricted Performance Share Units Plan	The table below presents certain information as to unvested RPSU awards. RPSU Grant Date 2/21/2019 3/5/2020 3/5/2021 Total (Amounts below in shares, unless otherwise noted) Non-vested at January 1, 2021 206,069 319,600 — 525,669 Granted — — 380,957 380,957 Non-vested at March 31, 2021 206,069 319,600 380,957 906,626 Measurement Period Commencement Date 1/1/2019 1/1/2020 1/1/2021 Measurement Period End Date 12/31/2021 12/31/2022 12/31/2023 Granted 213,728 319,600 380,957 Fair Value of Units on Grant Date (in thousands) $ 4,627 $ 5,389 $ 6,389

Segment Information (Tables)

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2021
Segment Reporting [Abstract]
Real Estate Investments, Net Operating Income and Unconsolidated Real Estate Ventures of Reportable Segments	The following tables provide selected asset information and results of operations of the Company's reportable segments (in thousands): Real estate investments, at cost: March 31, 2021 December 31, 2020 Philadelphia CBD $ 1,429,695 $ 1,433,927 Pennsylvania Suburbs 870,403 871,530 Austin, Texas 728,702 728,741 Metropolitan Washington, D.C. 270,582 352,794 Other 87,177 87,117 Operating Properties $ 3,386,559 $ 3,474,109 Corporate Right of use asset - operating leases, net $ 20,810 $ 20,977 Construction-in-progress $ 264,529 $ 210,311 Land held for development $ 116,902 $ 117,984 Prepaid leasehold interests in land held for development, net $ 27,762 $ 39,185 Net operating income: Three Months Ended March 31, 2021 2020 Total revenue Operating expenses (a) Net operating income Total revenue Operating expenses (a) Net operating income (loss) Philadelphia CBD $ 51,227 $ (17,411) $ 33,816 $ 65,915 $ (24,198) $ 41,717 Pennsylvania Suburbs 31,740 (10,694) 21,046 37,237 (12,678) 24,559 Austin, Texas 26,175 (9,720) 16,455 26,581 (10,145) 16,436 Metropolitan Washington, D.C. 4,675 (4,199) 476 10,754 (5,512) 5,242 Other 3,213 (2,282) 931 3,652 (2,693) 959 Corporate 3,739 (2,368) 1,371 949 (1,684) (735) Operating properties $ 120,769 $ (46,674) $ 74,095 $ 145,088 $ (56,910) $ 88,178 (a) Includes property operating expenses, real estate taxes and third party management expense. Unconsolidated real estate ventures: Investment in real estate ventures Equity in income (loss) of real estate venture As of Three Months Ended March 31, March 31, 2021 December 31, 2020 2021 2020 Philadelphia CBD $ 300,694 $ 268,562 $ (4,279) $ 78 Metropolitan Washington, D.C. 99,617 99,769 (417) (449) Mid-Atlantic Office JV 32,735 32,996 207 — MAP Venture (17,223) (11,516) (2,435) (1,520) Total $ 415,823 $ 389,811 $ (6,924) $ (1,891)
Reconciliation of Consolidated Net Income to Consolidated NOI	The following is a reconciliation of consolidated net income, as defined by GAAP, to consolidated NOI, (in thousands): Three Months Ended March 31, 2021 2020 Net income $ 6,964 $ 8,087 Plus: Interest expense 16,293 20,009 Interest expense - amortization of deferred financing costs 709 749 Depreciation and amortization 40,343 52,038 General and administrative expenses 6,584 8,561 Equity in loss of Real Estate Ventures 6,924 1,891 Less: Interest and investment income 1,674 575 Income tax provision (19) (4) Net gain on disposition of real estate 74 2,586 Net gain on sale of undepreciated real estate 1,993 — Consolidated net operating income $ 74,095 $ 88,178

Organization of The Parent Co_3

Organization of The Parent Company and The Operating Partnership - Narrative (Details)	3 Months Ended
	Mar. 31, 2021aft²parcelproperty
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of properties | property	81
Net rentable area (in square feet)	13,651,396
Parent Company
Organization of The Parent Company and The Operating Partnership [Line Items]
Areas of land held for development (in acres) | a	228.5
Area of land held for sale (in acres) | a	35.2
Area of additional undeveloped parcels of land with option to purchase (in acres) | a	55.5
Total potential development capacity (in square feet)	13,900,000
Wholly-owned Management Company Subsidiaries
Organization of The Parent Company and The Operating Partnership [Line Items]
Net rentable area (in square feet)	24,500,000
Wholly Owned Properties | Wholly-owned Management Company Subsidiaries
Organization of The Parent Company and The Operating Partnership [Line Items]
Net rentable area (in square feet)	13,700,000
Partially Owned Properties | Wholly-owned Management Company Subsidiaries
Organization of The Parent Company and The Operating Partnership [Line Items]
Net rentable area (in square feet)	10,800,000
Land Parcel One | Parent Company
Organization of The Parent Company and The Operating Partnership [Line Items]
Lease agreement term	99 years
Land Parcel Two | Parent Company
Organization of The Parent Company and The Operating Partnership [Line Items]
Lease agreement term	99 years
Held-for-sale | Parent Company
Organization of The Parent Company and The Operating Partnership [Line Items]
Total potential development capacity (in square feet)	200,000
Leashold Interest Land | Parent Company
Organization of The Parent Company and The Operating Partnership [Line Items]
Areas of land held for development (in acres) | a	0.8
Number of parcels of land | parcel	1
Brandywine Operating Partnership LP
Organization of The Parent Company and The Operating Partnership [Line Items]
Ownership in the operating partnership	99.40%
Unconsolidated Real Estate Ventures | Unconsolidated Properties
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of properties | property	10

Organization of The Parent Co_4

Organization of The Parent Company and The Operating Partnership - Summary of Core Portfolio of Operating Properties and Excludes Development, Redevelopment and Held for Sale (Details)	Mar. 31, 2021ft²property
Real Estate Properties [Line Items]
Number of properties | property	81
Net rentable area (in square feet) | ft²	13,651,396
Office properties
Real Estate Properties [Line Items]
Number of properties | property	71
Net rentable area (in square feet) | ft²	12,006,744
Mixed-use properties
Real Estate Properties [Line Items]
Number of properties | property	5
Net rentable area (in square feet) | ft²	942,334
Core Properties
Real Estate Properties [Line Items]
Number of properties | property	76
Net rentable area (in square feet) | ft²	12,949,078
Development property
Real Estate Properties [Line Items]
Number of properties | property	1
Net rentable area (in square feet) | ft²	204,000
Redevelopment properties
Real Estate Properties [Line Items]
Number of properties | property	4
Net rentable area (in square feet) | ft²	498,318

Real Estate Investments - Gross

Real Estate Investments - Gross Carrying Value of Operating Properties (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Real Estate [Abstract]
Land	$ 391,344	$ 407,514
Building and improvements	2,592,548	2,665,232
Tenant improvements	402,667	401,363
Total	$ 3,386,559	$ 3,474,109

Real Estate Investments - Textu

Real Estate Investments - Textual (Details) $ in Thousands	Feb. 02, 2021USD ($)	Mar. 31, 2021USD ($)aparcel	Mar. 31, 2020USD ($)	Dec. 31, 2020USD ($)aparcel	Feb. 02, 2021ft²	Feb. 02, 2021a
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Investment in joint venture		$ 415,823		$ 389,811
Net gain on sale of undepreciated real estate		1,993	$ 0
Assets held for sale, net		7,349		7,349
Other - Land | Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale, net		$ 7,300		$ 7,300
Other - Land | Held-for-sale | Other
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Area of land (in acres) | a		35.2		35.2
Number of parcels of land | parcel		2		2
3025 JFK Venture
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Lease agreement term	99 years
Area of land (in acres)					1	1
Investment in joint venture	$ 34,800	$ 34,800
Net gain on sale of undepreciated real estate	$ 2,000

Investment in Unconsolidated _3

Investment in Unconsolidated Real Estate Ventures - Textual (Details) $ in Thousands	Feb. 02, 2021USD ($)	Mar. 31, 2021USD ($)aft²propertyinvestmentapartment	Mar. 31, 2020USD ($)	Feb. 02, 2021ft²	Feb. 02, 2021a	Feb. 02, 2021	Dec. 31, 2020USD ($)
Schedule of Equity Method Investments [Line Items]
Number of properties | property		81
Investment in Real Estate Ventures		$ 433,046					$ 401,327
Accounts receivable		14,665					13,536
Investment in joint venture		415,823					389,811
3025 JFK Venture
Schedule of Equity Method Investments [Line Items]
Area of land (in acres)				1	1
Equity method investment, ownership percentage						55.00%
Lease agreement term	99 years
Investment in joint venture	$ 34,800	34,800
Area of building to be constructed | ft²				570,000
Estimated project cost	287,000
Ownership interest held by partner						45.00%
Joint venture, funding committed by other party	$ 45,000
Joint venture, funding committed		20,200
Construction loan amount		$ 187,000
Minimum
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage		15.00%
Maximum
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage		70.00%
Real Estate Venture
Schedule of Equity Method Investments [Line Items]
Accounts receivable		$ 2,100					$ 1,200
Real Estate Venture | Management Fees
Schedule of Equity Method Investments [Line Items]
Service and other revenue		2,000	$ 1,100
Real Estate Venture | Leasing Commission Income
Schedule of Equity Method Investments [Line Items]
Service and other revenue		1,300	$ 400
Unconsolidated Real Estate Ventures
Schedule of Equity Method Investments [Line Items]
Investment in Real Estate Ventures		$ 415,800
Unconsolidated Real Estate Ventures | Office properties
Schedule of Equity Method Investments [Line Items]
Number of unconsolidated investments in Real Estate Ventures | investment		5
Rentable area (in square feet) | ft²		8,400,000
Unconsolidated Real Estate Ventures | Unconsolidated Properties
Schedule of Equity Method Investments [Line Items]
Number of properties | property		10
Number of properties with negative investment balances | property		1
Unconsolidated Real Estate Ventures | Land Held For Development
Schedule of Equity Method Investments [Line Items]
Number of unconsolidated investments in Real Estate Ventures | investment		2
Area of land (in acres) | a		1.4
Unconsolidated Real Estate Ventures | Land Under Active Development
Schedule of Equity Method Investments [Line Items]
Number of unconsolidated investments in Real Estate Ventures | investment		1
Area of land (in acres) | a		1
Unconsolidated Real Estate Ventures | Mixed Use Tower
Schedule of Equity Method Investments [Line Items]
Number of unconsolidated investments in Real Estate Ventures | investment		1
Rentable area (in square feet) | ft²		200,000
Number of apartment units (in units) | apartment		250
Unconsolidated Real Estate Ventures | Residential Tower
Schedule of Equity Method Investments [Line Items]
Number of unconsolidated investments in Real Estate Ventures | investment		1
Number of apartment units (in units) | apartment		321
Other Liabilities | Unconsolidated Real Estate Ventures
Schedule of Equity Method Investments [Line Items]
Investment in Real Estate Ventures		$ (17,200)

Investment in Unconsolidated _4

Investment in Unconsolidated Real Estate Ventures - Summary of Financial Position of Real Estate Ventures (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Net property	$ 2,916,395	$ 2,966,005
Other assets	185,844	176,747
Other liabilities	49,796	47,573
Debt, net	1,843,593
Equity	1,782,254	1,804,648	$ 1,603,814	$ 1,688,303
Investment In Nonconsolidated Real Estate
Schedule of Equity Method Investments [Line Items]
Net property	1,550,425	1,520,804
Other assets	473,771	488,805
Other liabilities	325,162	333,049
Debt, net	956,208	956,688
Equity	$ 742,826	$ 719,872

Investment in Unconsolidated _5

Investment in Unconsolidated Real Estate Ventures - Summary of Results of Operations of Real Estate Ventures with Interests (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Schedule of Equity Method Investments [Line Items]
Revenue	$ 120,769	$ 145,088
Operating expenses	(93,601)	(117,509)
Interest expense	(16,293)	(20,009)
Depreciation and amortization	(40,343)	(52,038)
Net income	6,964	8,087
Equity in loss of Real Estate Ventures	(6,924)	(1,891)
Investment In Nonconsolidated Real Estate
Schedule of Equity Method Investments [Line Items]
Revenue	53,357	31,151
Operating expenses	(28,987)	(17,961)
Interest expense	(7,374)	(4,989)
Depreciation and amortization	(24,893)	(12,523)
Net income	(7,897)	(4,322)
Company's share of loss	(6,541)	(1,862)
Basis adjustments and other	(383)	(29)
Equity in loss of Real Estate Ventures	$ (6,924)	$ (1,891)

Debt and Preferred Equity Inv_2

Debt and Preferred Equity Investments (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2021investmentproperty	Dec. 31, 2018USD ($)	Dec. 31, 2020USD ($)property
Summary of Investment Holdings [Line Items]
Number of properties | property	81
Austin Preferred Equity Investment
Summary of Investment Holdings [Line Items]
Investments			$ 50
Number of properties | property			2
Annual preferred return on invested capital	9.00%
Mandatory redemption term	1 year
Brandywine 1919 Ventures
Summary of Investment Holdings [Line Items]
Debt, net		$ 44.4
Note receivable		$ 44.4
Notes receivable, interest rate		4.00%
Repayment of construction loan		$ 88.8
Notes Receivable
Summary of Investment Holdings [Line Items]
Number of investments | investment	1
Preferred Equity Investment
Summary of Investment Holdings [Line Items]
Number of investments | investment	1

Leases (Details)

Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Fixed contractual payments	$ 86,380	$ 104,401
Variable lease payments	24,148	30,639
Total	$ 110,528	$ 135,040

Intangible Assets and Liabili_3

Intangible Assets and Liabilities - Intangible Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Intangible Assets [Line Items]
Intangible assets, total cost	$ 90,169	$ 94,173
Intangible assets, accumulated amortization	(46,286)	(45,603)
Intangible assets, net	43,883	48,570
Intangible liabilities, total cost	30,736	31,263
Intangible liabilities, accumulated amortization	(13,663)	(12,815)
Intangible liabilities, net	17,073	18,448
In-place lease value
Intangible Assets [Line Items]
Intangible assets, total cost	87,946	91,552
Intangible assets, accumulated amortization	(44,427)	(43,400)
Intangible assets, net	43,519	48,152
Tenant relationship value
Intangible Assets [Line Items]
Intangible assets, total cost	1,737	2,091
Intangible assets, accumulated amortization	(1,615)	(1,938)
Intangible assets, net	122	153
Above market leases acquired
Intangible Assets [Line Items]
Intangible assets, total cost	486	530
Intangible assets, accumulated amortization	(244)	(265)
Intangible assets, net	$ 242	$ 265

Intangible Assets and Liabili_4

Intangible Assets and Liabilities - Annual Amortization of Intangible Assets, Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Assets
2021 (nine months remaining)	$ 11,931
2022	10,050
2023	7,440
2024	5,215
2025	4,027
Thereafter	5,220
Intangible assets, net	43,883	$ 48,570
Liabilities
2021 (nine months remaining)	3,576
2022	2,682
2023	1,642
2024	1,425
2025	1,148
Thereafter	6,600
Intangible liabilities, net	$ 17,073	$ 18,448

Debt Obligations - Consolidated

Debt Obligations - Consolidated Debt Obligations Outstanding (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Consolidated debt obligations
Plus: original issue premium (discount), net	$ 9,650
Less: deferred financing costs	(7,667)
Outstanding indebtedness	1,843,593
Unsecured Debt
Consolidated debt obligations
Principal balance outstanding	1,841,610	$ 1,828,610
Plus: original issue premium (discount), net	9,650	10,137
Less: deferred financing costs	(7,667)	(8,152)
Outstanding indebtedness	1,843,593	1,830,595
Unsecured Debt | $600 million Unsecured Credit Facility
Consolidated debt obligations
Debt instrument, face amount	600,000
Principal balance outstanding	$ 13,000	0
Unsecured Debt | $600 million Unsecured Credit Facility | LIBOR
Consolidated debt obligations
Spread on variable rate	1.10%
Unsecured Debt | Seven-Year Term Loan - Swapped to fixed
Consolidated debt obligations
Debt instrument, term	7 years
Principal balance outstanding	$ 250,000	250,000
Effective interest rate	2.87%
Unsecured Debt | $350.0M 3.95% Guaranteed Notes due 2023
Consolidated debt obligations
Debt instrument, face amount	$ 350,000
Debt instrument, interest rate, stated percentage	3.95%
Principal balance outstanding	$ 350,000	350,000
Effective interest rate	3.87%
Unsecured Debt | $350.0M 4.10% Guaranteed Notes due 2024
Consolidated debt obligations
Debt instrument, face amount	$ 350,000
Debt instrument, interest rate, stated percentage	4.10%
Principal balance outstanding	$ 350,000	350,000
Effective interest rate	3.78%
Unsecured Debt | $450.0M 3.95% Guaranteed Notes due 2027
Consolidated debt obligations
Debt instrument, face amount	$ 450,000
Debt instrument, interest rate, stated percentage	3.95%
Principal balance outstanding	$ 450,000	450,000
Effective interest rate	4.03%
Unsecured Debt | $350.0M 4.55% Guaranteed Notes due 2029
Consolidated debt obligations
Debt instrument, face amount	$ 350,000
Debt instrument, interest rate, stated percentage	4.55%
Principal balance outstanding	$ 350,000	350,000
Effective interest rate	4.30%
Unsecured Debt | Indenture IA (Preferred Trust I)
Consolidated debt obligations
Principal balance outstanding	$ 27,062	27,062
Unsecured Debt | Indenture IA (Preferred Trust I) | LIBOR
Consolidated debt obligations
Spread on variable rate	1.25%
Unsecured Debt | Indenture IB (Preferred Trust I)
Consolidated debt obligations
Principal balance outstanding	$ 25,774	25,774
Unsecured Debt | Indenture IB (Preferred Trust I) | LIBOR
Consolidated debt obligations
Spread on variable rate	1.25%
Unsecured Debt | Indenture II (Preferred Trust II)
Consolidated debt obligations
Principal balance outstanding	$ 25,774	$ 25,774
Unsecured Debt | Indenture II (Preferred Trust II) | LIBOR
Consolidated debt obligations
Spread on variable rate	1.25%

Debt Obligations - Textual (Det

Debt Obligations - Textual (Details) - Revolving Credit Facility	3 Months Ended
	Mar. 31, 2021USD ($)
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 600,000,000
Weighted average interest rate	1.20%
LIBOR
Debt Instrument [Line Items]
Spread on variable rate	1.10%

Debt Obligations - Aggregate Sc

Debt Obligations - Aggregate Scheduled Principal Payments of Debt Obligation, Excluding Amortization of Discounts and Premiums (Details) $ in Thousands	Mar. 31, 2021USD ($)
Debt Disclosure [Abstract]
2021 (nine months remaining)	$ 0
2022	263,000
2023	350,000
2024	350,000
2025	0
Thereafter	878,610
Total principal payments	1,841,610
Net unamortized premiums/(discounts)	9,650
Net deferred financing costs	(7,667)
Outstanding indebtedness	$ 1,843,593

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Financial Instruments for which Estimates of Fair Value Differ from Carrying Amounts (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred financing costs, net	$ 7,667
Unsecured notes payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred financing costs, net	7,667	$ 8,152
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable	94,430	94,430
Carrying Amount | Unsecured notes payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured notes payable	1,502,768	1,502,901
Deferred financing costs, net	6,900	7,200
Carrying Amount | Variable rate debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Variable rate debt	340,825	327,694
Deferred financing costs, net	800	900
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable, fair value	97,076	97,372
Fair Value | Unsecured notes payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value	1,597,295	1,607,310
Fair Value | Variable rate debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value	$ 322,044	$ 308,838

Derivative Financial Instrume_3

Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Derivative, notional amount	$ 250,000	$ 275,774
2.868% Interest Rate Swap Maturing October 8, 2022 | Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative liability, notional amount	$ 250,000	250,000
Derivative, fixed interest rate	2.868%
Derivative liability, fair value, gross liability	$ (5,600)	(6,627)
3.300% Interest Rate Swap Maturing January 30, 2021 | Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative liability, notional amount	$ 0	25,774
Derivative, fixed interest rate	3.30%
Derivative liability, fair value, gross liability	$ 0	$ (120)

Limited Partners' Non-Control_2

Limited Partners' Non-Controlling Interests in the Parent Company (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Noncontrolling Interest [Abstract]
Aggregate amount related to non-controlling interests classified within equity	$ 10.3	$ 10.5
Settlement value of non controlling interest in operating partnership	$ 12.7	$ 11.7

Beneficiaries Equity of the P_3

Beneficiaries Equity of the Parent Company - Number of Shares and Net Income Used to Calculate Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Numerator
Net income	$ 6,964	$ 8,087
Net income attributable to noncontrolling interests, Basic	(43)	(65)
Nonforfeitable dividends allocated to unvested restricted shareholders, Basic	(146)	(131)
Net income attributable to noncontrolling interests, Diluted	(43)	(65)
Nonforfeitable dividends allocated to unvested restricted shareholders, Diluted	(146)	(131)
Net income attributable to Common Shareholders of Brandywine Realty Trust	6,775	7,891
Net income attributable to common shareholders, Diluted	$ 6,775	$ 7,891
Denominator
Basic weighted average shares outstanding (in shares)	170,624,741	176,069,968
Contingent securities/Share based compensation (in shares)	1,011,379	583,491
Diluted weighted average shares outstanding (in shares)	171,636,120	176,653,459
Earnings per Common Share:
Net income attributable to common shareholders, Basic (USD per share)	$ 0.04	$ 0.04
Net income attributable to common shareholders, Diluted (USD per share)	$ 0.04	$ 0.04

Beneficiaries Equity of the P_4

Beneficiaries Equity of the Parent Company - Textual (Details) - USD ($)	Feb. 24, 2021	Mar. 31, 2021	Mar. 31, 2020	Jan. 03, 2019
Class of Stock [Line Items]
Dividends, common stock	$ 32,800,000
Shares repurchased and retired (in shares)			5,644,200
Share price (in dollars per share)			$ 9.54
Value of stock repurchased and retired			$ 53,858,000
Maximum
Class of Stock [Line Items]
Share repurchase, authorized amount				$ 150,000,000
Dividend declared
Class of Stock [Line Items]
Dividends payable (in dollars per share)	$ 0.19
Redeemable Common Limited Partnership Units
Class of Stock [Line Items]
Redeemable common limited partnership units (in shares)		981,634	981,634

Partners' Equity Of The Paren_3

Partners' Equity Of The Parent Company - Number of Units and Net Income Used to Calculate Basic and Diluted Earnings Per Common Partnership Unit (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Numerator
Net income	$ 6,964	$ 8,087
Nonforfeitable dividends allocated to unvested restricted shareholders, Basic	(146)	(131)
Nonforfeitable dividends allocated to unvested restricted shareholders, Diluted	$ (146)	$ (131)
Denominator
Basic weighted average shares outstanding (in shares)	170,624,741	176,069,968
Contingent securities/Share based compensation (in shares)	1,011,379	583,491
Diluted weighted average shares outstanding (in shares)	171,636,120	176,653,459
Earnings per Common Partnership Unit:
Net income attributable to common shareholders, Basic (USD per share)	$ 0.04	$ 0.04
Net income attributable to common shareholders, Diluted (USD per share)	$ 0.04	$ 0.04
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Numerator
Net income	$ 6,964	$ 8,087
Net income attributable to noncontrolling interests	1	(12)
Nonforfeitable dividends allocated to unvested restricted shareholders, Basic	(146)	(131)
Nonforfeitable dividends allocated to unvested restricted shareholders, Diluted	(146)	(131)
Net income attributable to common unitholders, Basic	6,819	7,944
Net income attributable to common unitholders, Diluted	$ 6,819	$ 7,944
Denominator
Basic weighted average shares outstanding (in shares)	171,606,375	177,051,602
Contingent securities/Share based compensation (in shares)	1,011,379	583,491
Diluted weighted average shares outstanding (in shares)	172,617,754	177,635,093
Earnings per Common Partnership Unit:
Net income attributable to common shareholders, Basic (USD per share)	$ 0.04	$ 0.04
Net income attributable to common shareholders, Diluted (USD per share)	$ 0.04	$ 0.04

Partners' Equity Of The Paren_4

Partners' Equity Of The Parent Company - Textual (Details) $ / shares in Units, $ in Thousands	Feb. 24, 2021USD ($)$ / shares	Mar. 31, 2021	Mar. 31, 2020USD ($)$ / sharesshares
Earnings Per Common Partnership Unit [Line Items]
Dividends, common stock | $	$ 32,800
Shares repurchased and retired (in shares) | shares			5,644,200
Share price (in dollars per share) | $ / shares			$ 9.54
Value of stock repurchased and retired | $			$ 53,858
Dividend declared
Earnings Per Common Partnership Unit [Line Items]
Dividends payable (in dollars per share) | $ / shares	$ 0.19
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Earnings Per Common Partnership Unit [Line Items]
Dividends, common stock | $	$ 32,800
Repurchase program, ratio of mirror unit of operating partnership retired for each common share repurchased		1
BRANDYWINE OPERATING PARTNERSHIP, L.P. | Dividend declared
Earnings Per Common Partnership Unit [Line Items]
Dividends payable (in dollars per share) | $ / shares	$ 0.19

Share Based Compensation - Narr

Share Based Compensation - Narrative (Details) $ / shares in Units, $ in Millions	Mar. 04, 2021shares	Feb. 23, 2021installmentshares	Feb. 01, 2021shares	Mar. 05, 2020	Feb. 28, 2018	Mar. 31, 2021USD ($)shares	Mar. 31, 2020USD ($)	Jan. 20, 2021$ / shares	Dec. 31, 2020shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Voluntary termination of employment age limit						57
Number of vesting installments | installment		3
Vesting acceleration period		1 year
Restricted Share Rights Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted share rights outstanding (in shares) | shares						770,988			488,735
Unrecognized compensation expenses | $						$ 3.3
Weighted average period over which options will be recognized						2 years 3 days
Share-based compensation expense | $						$ 2.3	$ 1.9
Share-based compensation expense, capitalized | $						$ 0.3	0.3
Granted (in shares) | shares	252,278					301,545
Ratio of restricted share right will get settled for common share	1
Accumulated service period for voluntary termination						15 years
Restricted Share Rights Awards | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period						1 year
Restricted Share Rights Awards | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years					3 years
Restricted Performance Share Units Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period					3 years
Unrecognized compensation expenses | $						$ 10
Weighted average period over which options will be recognized						2 years 3 months 14 days
Share-based compensation expense | $						$ 0.8	0.6
Share-based compensation expense, capitalized | $						$ 0.1	$ 0.1
Common shares issued for share based compensation (in shares) | shares			82,513
Dividends payable (in dollars per share) | $ / shares								$ 0.19
Executive Officer | Restricted Performance Share Units Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted share rights outstanding (in shares) | shares						906,626			525,669
Granted (in shares) | shares						380,957
Performance earning potential				200.00%
Outperformance feature measurement term				3 years		3 years
Vesting period after outperformance feature measurement term						2 years
Executive Officer | Restricted Performance Share Units Plan | 2021 Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards issuable under outperformance feature (in shares) | shares						388,840
Share-based compensation expense recognized to date | $						$ 0
Executive Officer | Restricted Performance Share Units Plan | 2020 Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards issuable under outperformance feature (in shares) | shares						316,236
Share-based compensation expense recognized to date | $						$ 0
Executive Officer | Restricted Performance Share Units Plan | 2019 Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards issuable under outperformance feature (in shares) | shares						228,858
Share-based compensation expense recognized to date | $						$ 0.2
Non Officer Employees | Restricted Performance Share Units Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted share rights outstanding (in shares) | shares		49,267

Share Based Compensation - Rest

Share Based Compensation - Restricted Share Activity (Details) - Restricted Share Rights Awards - $ / shares	Mar. 04, 2021	Mar. 31, 2021
Shares
Beginning balance (in shares)		488,735
Granted (in shares)	252,278	301,545
Vested (in shares)		(17,734)
Forfeited (in shares)		(1,558)
Ending balance (in shares)		770,988
Weighted Average Grant Date Fair Value
Non-vested at beginning of year, Weighted Average Grant Date Fair Value (in dollars per shares)		$ 15.19
Granted, Weighted Average Grant Date Fair Value (in dollars per shares)		12.58
Vested, Weighted Average Grant Date Fair Value (in dollars per shares)		14.96
Forfeited, Weighted Average Grant Date Fair Value (in dollars per shares)		14.99
Non-vested at end of year, Weighted Average Grant Date Fair Value (in dollars per shares)		$ 14.18

Share Based Compensation - Re_2

Share Based Compensation - Restricted Performance Share Units (Details) - Executive Officer - Restricted Performance Share Units Plan - USD ($) $ in Thousands	Mar. 05, 2021	Mar. 05, 2020	Feb. 21, 2019	Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning balance (in shares)				525,669
Granted (in shares)				380,957
Ending balance (in shares)				906,626
February 21, 2019 RSPU Grant
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning balance (in shares)				206,069
Granted (in shares)				0
Ending balance (in shares)				206,069
Granted (in shares)			213,728
Fair value of units on grant date			$ 4,627
March 5, 2020 RSPU Grant
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning balance (in shares)				319,600
Granted (in shares)				0
Ending balance (in shares)				319,600
Granted (in shares)		319,600
Fair value of units on grant date		$ 5,389
March 5, 2021 RSPU Grant
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning balance (in shares)				0
Granted (in shares)				380,957
Ending balance (in shares)				380,957
Granted (in shares)	380,957
Fair value of units on grant date	$ 6,389

Segment Information (Textual) (

Segment Information (Textual) (Details)	3 Months Ended
	Mar. 31, 2021segment
Segment Reporting [Abstract]
Number of reportable segments	5

Segment Information - Real Esta

Segment Information - Real Estate Investments, at Cost of Company's Reportable Segments (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Operating properties	$ 3,386,559	$ 3,474,109
Right of use asset - operating leases, net	20,810	20,977
Construction-in-progress	264,529	210,311
Land held for development	116,902	117,984
Prepaid leasehold interests in land held for development, net	27,762	39,185
Philadelphia CBD
Segment Reporting Information [Line Items]
Operating properties	1,429,695	1,433,927
Pennsylvania Suburbs
Segment Reporting Information [Line Items]
Operating properties	870,403	871,530
Austin, Texas
Segment Reporting Information [Line Items]
Operating properties	728,702	728,741
Metropolitan Washington, D.C.
Segment Reporting Information [Line Items]
Operating properties	270,582	352,794
Other
Segment Reporting Information [Line Items]
Operating properties	$ 87,177	$ 87,117

Segment Information - Net Opera

Segment Information - Net Operating Income of Company's Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Total revenue	$ 120,769	$ 145,088
Operating expenses	(46,674)	(56,910)
Net operating income (loss)	74,095	88,178
Operating Segments | Philadelphia CBD
Segment Reporting Information [Line Items]
Total revenue	51,227	65,915
Operating expenses	(17,411)	(24,198)
Net operating income (loss)	33,816	41,717
Operating Segments | Pennsylvania Suburbs
Segment Reporting Information [Line Items]
Total revenue	31,740	37,237
Operating expenses	(10,694)	(12,678)
Net operating income (loss)	21,046	24,559
Operating Segments | Austin, Texas
Segment Reporting Information [Line Items]
Total revenue	26,175	26,581
Operating expenses	(9,720)	(10,145)
Net operating income (loss)	16,455	16,436
Operating Segments | Metropolitan Washington, D.C.
Segment Reporting Information [Line Items]
Total revenue	4,675	10,754
Operating expenses	(4,199)	(5,512)
Net operating income (loss)	476	5,242
Operating Segments | Other
Segment Reporting Information [Line Items]
Total revenue	3,213	3,652
Operating expenses	(2,282)	(2,693)
Net operating income (loss)	931	959
Corporate
Segment Reporting Information [Line Items]
Total revenue	3,739	949
Operating expenses	(2,368)	(1,684)
Net operating income (loss)	$ 1,371	$ (735)

Segment Information - Unconsoli

Segment Information - Unconsolidated Real Estate Ventures of Company's Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Investment in joint venture	$ 415,823		$ 389,811
Equity in loss of real estate ventures	(6,924)	$ (1,891)
Philadelphia CBD
Segment Reporting Information [Line Items]
Investment in joint venture	300,694		268,562
Equity in loss of real estate ventures	(4,279)	78
Metropolitan Washington, D.C.
Segment Reporting Information [Line Items]
Investment in joint venture	99,617		99,769
Equity in loss of real estate ventures	(417)	(449)
Mid-Atlantic Office Joint Venture
Segment Reporting Information [Line Items]
Investment in joint venture	32,735		32,996
Equity in loss of real estate ventures	207	0
MAP Venture
Segment Reporting Information [Line Items]
Investment in joint venture	(17,223)		$ (11,516)
Equity in loss of real estate ventures	$ (2,435)	$ (1,520)

Segment Information - Reconcili

Segment Information - Reconciliation of Consolidated Net Income to Consolidated NOI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting [Abstract]
Net income	$ 6,964	$ 8,087
Plus:
Interest expense	16,293	20,009
Interest expense - amortization of deferred financing costs	709	749
Depreciation and amortization	40,343	52,038
General and administrative expenses	6,584	8,561
Equity in loss of Real Estate Ventures	6,924	1,891
Less:
Interest and investment income	1,674	575
Income tax provision	(19)	(4)
Net gain on disposition of real estate	74	2,586
Net gain on sale of undepreciated real estate	1,993	0
Consolidated net operating income	$ 74,095	$ 88,178

Commitments and Contingencies (

Commitments and Contingencies (Details)	1 Months Ended	3 Months Ended
	Feb. 28, 2021property	Mar. 31, 2021USD ($)
Property Subject to or Available for Operating Lease [Line Items]
Debt, net		$ 1,843,593,000
Winter Storm
Property Subject to or Available for Operating Lease [Line Items]
Number of properties damaged | property	1
Write-off of fixed assets		1,200,000
Restoration liability		6,400,000
Insurance proceeds		4,000,000
Insurance receivable		3,600,000
One and Two Commerce Square | Preferred Equity Investment
Property Subject to or Available for Operating Lease [Line Items]
Other commitments		20,000,000
Amount committed to date		2,100,000
Drexel Square
Property Subject to or Available for Operating Lease [Line Items]
Other commitments		7,600,000
Estimated potential additional contribution obligation		2,500,000
4040 Wilson Venture
Property Subject to or Available for Operating Lease [Line Items]
Debt, net		150,000,000
Guarantees, maximum exposure amount		41,300,000
Unconsolidated Real Estate Ventures
Property Subject to or Available for Operating Lease [Line Items]
Real estate ventures aggregate indebtedness		$ 961,900,000