Brandywine Realty Trust (BDN) 10-Q 28 Jul 20 2020 Q2 Quarterly report Financial data

Cover Page

Cover Page - shares	6 Months Ended
	Jun. 30, 2020	Jul. 22, 2020
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2020
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		170,573,159
Entity Central Index Key	0000790816
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
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	Jun. 30, 2020	Dec. 31, 2019
Real estate investments:
Operating properties	$ 3,650,521	$ 4,006,459
Accumulated depreciation	(957,189)	(973,318)
Right of use asset - operating leases, net	21,315	21,656
Operating real estate investments, net	2,714,647	3,054,797
Construction-in-progress	235,475	180,718
Land held for development	112,420	96,124
Prepaid leasehold interests in land held for development, net	39,389	39,592
Total real estate investments, net	3,101,931	3,371,231
Assets held for sale, net	300,483	7,349
Cash and cash equivalents	44,819	90,499
Accounts receivable, net of allowance of $0 and $284 as of June 30, 2020 and December 31, 2019, respectively	18,823	16,363
Accrued rent receivable, net of allowance of $6,844 and $7,691 as of June 30, 2020 and December 31, 2019, respectively	177,124	174,144
Investment in Real Estate Ventures	118,558	120,294
Deferred costs, net	87,811	95,560
Intangible assets, net	55,262	84,851
Other assets	117,959	115,678
Total assets	4,022,770	4,075,969
LIABILITIES AND EQUITY
Mortgage notes payable, net	89,435	313,812
Unsecured credit facility	61,000	0
Unsecured term loan, net	248,823	248,561
Unsecured senior notes, net	1,581,777	1,582,045
Accounts payable and accrued expenses	113,826	113,347
Distributions payable	32,747	33,815
Deferred income, gains and rent	24,984	35,284
Intangible liabilities, net	18,577	22,263
Liabilities related to assets held for sale, net	225,993	0
Lease liability - operating leases	22,655	22,554
Other liabilities	32,104	15,985
Total liabilities	2,451,921	2,387,666
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; 170,573,159 and 176,480,095 issued and outstanding as of June 30, 2020 and December 31, 2019, respectively	1,707	1,766
Additional paid-in-capital	3,135,590	3,192,158
Deferred compensation payable in common shares	17,516	16,216
Common shares in grantor trust, 1,160,689 and 1,105,542 issued and outstanding as of June 30, 2020 and December 31, 2019, respectively	(17,516)	(16,216)
Cumulative earnings	816,574	804,556
Accumulated other comprehensive loss	(9,970)	(2,370)
Cumulative distributions	(2,383,273)	(2,318,233)
Total Brandywine Realty Trust's equity	1,560,628	1,677,877
Noncontrolling interests	10,221	10,426
Total beneficiaries' equity	1,570,849	1,688,303
Total liabilities and beneficiaries' equity	4,022,770	4,075,969
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Real estate investments:
Operating properties	3,650,521	4,006,459
Accumulated depreciation	(957,189)	(973,318)
Right of use asset - operating leases, net	21,315	21,656
Operating real estate investments, net	2,714,647	3,054,797
Construction-in-progress	235,475	180,718
Land held for development	112,420	96,124
Prepaid leasehold interests in land held for development, net	39,389	39,592
Total real estate investments, net	3,101,931	3,371,231
Assets held for sale, net	300,483	7,349
Cash and cash equivalents	44,819	90,499
Accounts receivable, net of allowance of $0 and $284 as of June 30, 2020 and December 31, 2019, respectively	18,823	16,363
Accrued rent receivable, net of allowance of $6,844 and $7,691 as of June 30, 2020 and December 31, 2019, respectively	177,124	174,144
Investment in Real Estate Ventures	118,558	120,294
Deferred costs, net	87,811	95,560
Intangible assets, net	55,262	84,851
Other assets	117,959	115,678
Total assets	4,022,770	4,075,969
LIABILITIES AND EQUITY
Mortgage notes payable, net	89,435	313,812
Unsecured credit facility	61,000	0
Unsecured term loan, net	248,823	248,561
Unsecured senior notes, net	1,581,777	1,582,045
Accounts payable and accrued expenses	113,826	113,347
Distributions payable	32,747	33,815
Deferred income, gains and rent	24,984	35,284
Intangible liabilities, net	18,577	22,263
Liabilities related to assets held for sale, net	225,993	0
Lease liability - operating leases	22,655	22,554
Other liabilities	32,104	15,985
Total liabilities	2,451,921	2,387,666
Commitments and contingencies (See Note 14)
Redeemable limited partnership units at redemption value; 981,634 issued and outstanding as of June 30, 2020 and December 31, 2019, respectively	10,537	15,388
Equity:
General Partnership Capital; 170,573,159 and 176,480,095 units issued and outstanding as of June 30, 2020 and December 31, 2019, respectively	1,569,557	1,674,539
Accumulated other comprehensive loss	(10,358)	(2,715)
Total Brandywine Operating Partnership, L.P.'s equity	1,559,199	1,671,824
Noncontrolling interest - consolidated real estate ventures	1,113	1,091
Total partners' equity	1,560,312	1,672,915
Total liabilities and beneficiaries' equity	$ 4,022,770	$ 4,075,969

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Accounts receivable, allowance	$ 0	$ 284
Accrued rent receivable, allowance	$ 6,844	$ 7,691
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)	170,573,159	176,480,095
Common stock, shares outstanding (in shares)	170,573,159	176,480,095
Common shares in grantor trust, issued and outstanding (in shares)	1,160,689	1,105,542
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Accounts receivable, allowance	$ 0	$ 284
Accrued rent receivable, allowance	$ 6,844	$ 7,691
Redeemable limited partnership units issued (in units)	981,634	981,634
Redeemable limited partnership units outstanding (in units)	981,634	981,634
General partners' capital account, units issued (in units)	170,573,159	176,480,095
General partners' capital account, units outstanding (in units)	170,573,159	176,480,095

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue
Revenue	$ 136,837	$ 144,151	$ 281,925	$ 288,047
Operating expenses
Property operating expenses	33,292	38,684	70,753	78,184
Real estate taxes	16,815	16,089	33,602	31,872
Third party management expenses	2,375	2,449	5,037	4,566
Depreciation and amortization	49,743	51,667	101,781	103,111
General and administrative expenses	8,343	8,399	16,904	18,243
Total operating expenses	110,568	117,288	228,077	235,976
Gain on sale of real estate
Net gain on disposition of real estate	0	0	2,586	0
Net gain on sale of undepreciated real estate	201	250	201	1,251
Total gain on sale of real estate	201	250	2,787	1,251
Operating income	26,470	27,113	56,635	53,322
Other income (expense):
Interest income	445	553	1,020	1,078
Interest expense	(20,191)	(20,516)	(40,200)	(40,873)
Interest expense - amortization of deferred financing costs	(731)	(666)	(1,480)	(1,332)
Equity in loss of Real Estate Ventures	(2,203)	(1,491)	(4,094)	(2,849)
Net gain on real estate venture transactions	0	1,276	0	1,535
Net income before income taxes	3,790	6,269	11,881	10,881
Income tax (provision) benefit	230	(17)	226	(46)
Net income	4,020	6,252	12,107	10,835
Net income attributable to noncontrolling interests	(24)	(47)	(89)	(107)
Net income attributable to Brandywine Realty Trust	3,996	6,205	12,018	10,728
Nonforfeitable dividends allocated to unvested restricted shareholders	(93)	(93)	(224)	(212)
Net income attributable to Common Shareholders of Brandywine Realty Trust	$ 3,903	$ 6,112	$ 11,794	$ 10,516
Basic income per Common Share (in dollars per share)	$ 0.02	$ 0.03	$ 0.07	$ 0.06
Diluted income per Common Share (in dollars per share)	$ 0.02	$ 0.03	$ 0.07	$ 0.06
Basic weighted average shares outstanding (in shares)	170,518,095	176,143,206	173,294,031	176,001,071
Diluted weighted average shares outstanding (in shares)	170,770,078	176,690,824	173,605,948	176,578,140
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Revenue	$ 136,837	$ 144,151	$ 281,925	$ 288,047
Operating expenses
Property operating expenses	33,292	38,684	70,753	78,184
Real estate taxes	16,815	16,089	33,602	31,872
Third party management expenses	2,375	2,449	5,037	4,566
Depreciation and amortization	49,743	51,667	101,781	103,111
General and administrative expenses	8,343	8,399	16,904	18,243
Total operating expenses	110,568	117,288	228,077	235,976
Gain on sale of real estate
Net gain on disposition of real estate	0	0	2,586	0
Net gain on sale of undepreciated real estate	201	250	201	1,251
Total gain on sale of real estate	201	250	2,787	1,251
Operating income	26,470	27,113	56,635	53,322
Other income (expense):
Interest income	445	553	1,020	1,078
Interest expense	(20,191)	(20,516)	(40,200)	(40,873)
Interest expense - amortization of deferred financing costs	(731)	(666)	(1,480)	(1,332)
Equity in loss of Real Estate Ventures	(2,203)	(1,491)	(4,094)	(2,849)
Net gain on real estate venture transactions	0	1,276	0	1,535
Net income before income taxes	3,790	6,269	11,881	10,881
Income tax (provision) benefit	230	(17)	226	(46)
Net income	4,020	6,252	12,107	10,835
Net income attributable to noncontrolling interests - consolidated real estate ventures	(10)	(13)	(22)	(47)
Net income attributable to Brandywine Operating Partnership	4,010	6,239	12,085	10,788
Nonforfeitable dividends allocated to unvested restricted shareholders	(93)	(93)	(224)	(212)
Net income attributable to Common Shareholders of Brandywine Realty Trust	$ 3,917	$ 6,146	$ 11,861	$ 10,576
Basic income per Common Share (in dollars per share)	$ 0.02	$ 0.03	$ 0.07	$ 0.06
Diluted income per Common Share (in dollars per share)	$ 0.02	$ 0.03	$ 0.07	$ 0.06
Basic weighted average shares outstanding (in shares)	171,499,729	177,125,064	174,275,665	176,983,433
Diluted weighted average shares outstanding (in shares)	171,751,712	177,672,683	174,587,582	177,560,502
Rents
Revenue
Revenue	$ 132,180	$ 137,787	$ 271,384	$ 275,885
Rents | BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Revenue	132,180	137,787	271,384	275,885
Third party management fees, labor reimbursement and leasing
Revenue
Service and other revenue	4,061	5,148	9,015	9,103
Third party management fees, labor reimbursement and leasing | BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Service and other revenue	4,061	5,148	9,015	9,103
Other
Revenue
Service and other revenue	596	1,216	1,526	3,059
Other | BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Service and other revenue	$ 596	$ 1,216	$ 1,526	$ 3,059

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Net income		$ 4,020	$ 6,252	$ 12,107	$ 10,835
Comprehensive income (loss):
Unrealized gain (loss) on derivative financial instruments		38	(4,934)	(8,019)	(7,623)
Amortization of interest rate contracts	[1]	188	188	376	394
Total comprehensive income (loss)		226	(4,746)	(7,643)	(7,229)
Comprehensive income		4,246	1,506	4,464	3,606
Comprehensive income attributable to noncontrolling interest		(25)	(21)	(46)	(67)
Comprehensive income attributable to Brandywine Realty Trust		4,221	1,485	4,418	3,539
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Net income		4,020	6,252	12,107	10,835
Comprehensive income (loss):
Unrealized gain (loss) on derivative financial instruments		38	(4,934)	(8,019)	(7,623)
Amortization of interest rate contracts	[1]	188	188	376	394
Total comprehensive income (loss)		226	(4,746)	(7,643)	(7,229)
Comprehensive income		4,246	1,506	4,464	3,606
Comprehensive income attributable to noncontrolling interest		(10)	(13)	(22)	(47)
Comprehensive income attributable to Brandywine Realty Trust		$ 4,236	$ 1,493	$ 4,442	$ 3,559
[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	Cumulative effect of accounting change	Cumulative effect of accounting changeCumulative Earnings
Beginning balance (in shares) at Dec. 31, 2018		176,873,324	977,120
Beginning balance at Dec. 31, 2018	$ 1,811,028	$ 1,770	$ 14,021	$ 3,200,312	$ (14,021)	$ 775,625	$ 5,029	$ (2,183,909)	$ 12,201	$ (5,336)	$ (5,336)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,583					4,523			60
Other comprehensive income (loss)	(2,483)						(2,469)		(14)
Repurchase and retirement of Common Shares of Beneficial Interest (in shares)		(1,337,169)
Repurchase and retirement of Common Shares of Beneficial Interest	(17,281)	$ (13)		(17,268)
Repurchase and retirement of Common Shares of Beneficial Interest	22								22
Share-based compensation activity (in shares)		465,883	41,342
Share-based compensation activity	3,677	$ 4		3,673
Share Issuance from/(to) Deferred Compensation Plan (in shares)		(458)	(5,920)
Share Issuance from/(to) Deferred Compensation Plan	0		$ 619		(619)
Reallocation of Noncontrolling interest	0			57					(57)
Distributions declared	(33,747)							(33,560)	(187)
Ending balance (in shares) at Mar. 31, 2019		176,001,580	1,012,542
Ending balance at Mar. 31, 2019	1,760,463	$ 1,761	$ 14,640	3,186,774	(14,640)	774,812	2,560	(2,217,469)	12,025
Beginning balance (in shares) at Dec. 31, 2018		176,873,324	977,120
Beginning balance at Dec. 31, 2018	1,811,028	$ 1,770	$ 14,021	3,200,312	(14,021)	775,625	5,029	(2,183,909)	12,201	$ (5,336)	$ (5,336)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	10,835
Other comprehensive income (loss)	$ (7,229)
Repurchase and retirement of Common Shares of Beneficial Interest (in shares)	(1,337,169)
Repurchase and retirement of Common Shares of Beneficial Interest	$ (17,300)
Ending balance (in shares) at Jun. 30, 2019		176,197,883	1,113,450
Ending balance at Jun. 30, 2019	1,729,665	$ 1,763	$ 16,239	3,188,239	(16,239)	781,017	(2,160)	(2,251,040)	11,846
Beginning balance (in shares) at Mar. 31, 2019		176,001,580	1,012,542
Beginning balance at Mar. 31, 2019	1,760,463	$ 1,761	$ 14,640	3,186,774	(14,640)	774,812	2,560	(2,217,469)	12,025
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,252					6,205			47
Other comprehensive income (loss)	(4,746)						(4,720)		(26)
Repurchase and retirement of Common Shares of Beneficial Interest	3								3
Redemption of LP Units (in shares)		1,245
Redemption of LP Units	0			16					(16)
Share-based compensation activity (in shares)		94,150
Share-based compensation activity	1,451	$ 2		1,449
Share Issuance from/(to) Deferred Compensation Plan (in shares)		100,908	100,908
Share Issuance from/(to) Deferred Compensation Plan	0		$ 1,599		(1,599)
Distributions declared	(33,758)							(33,571)	(187)
Ending balance (in shares) at Jun. 30, 2019		176,197,883	1,113,450
Ending balance at Jun. 30, 2019	1,729,665	$ 1,763	$ 16,239	3,188,239	(16,239)	781,017	(2,160)	(2,251,040)	11,846
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)
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, 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	12,107
Other comprehensive income (loss)	$ (7,643)
Repurchase and retirement of Common Shares of Beneficial Interest (in shares)	(6,248,483)
Repurchase and retirement of Common Shares of Beneficial Interest	$ (60,000)
Ending balance (in shares) at Jun. 30, 2020		170,573,159	1,160,689
Ending balance at Jun. 30, 2020	1,570,849	$ 1,707	$ 17,516	3,135,590	(17,516)	816,574	(9,970)	(2,383,273)	10,221
Beginning balance (in shares) at Mar. 31, 2020		170,965,987	1,117,783
Beginning 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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,020					3,996			24
Other comprehensive income (loss)	226						225		1
Repurchase and retirement of Common Shares of Beneficial Interest (in shares)		(604,283)
Repurchase and retirement of Common Shares of Beneficial Interest	(6,141)	$ (5)		(6,136)
Share-based compensation activity (in shares)		166,628
Share-based compensation activity	1,668	$ 2		1,666
Share Issuance from/(to) Deferred Compensation Plan (in shares)		44,827	42,906
Share Issuance from/(to) Deferred Compensation Plan	(11)		$ 504	(11)	(504)
Reallocation of Noncontrolling interest	0			(123)					123
Distributions declared	(32,727)							(32,540)	(187)
Ending balance (in shares) at Jun. 30, 2020		170,573,159	1,160,689
Ending balance at Jun. 30, 2020	$ 1,570,849	$ 1,707	$ 17,516	$ 3,135,590	$ (17,516)	$ 816,574	$ (9,970)	$ (2,383,273)	$ 10,221

Consolidated Statements of Be_2

Consolidated Statements of Beneficiaries' Equity (Parenthetical) - $ / shares	3 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]
Distributions declared (in dollars per share)	$ 0.19	$ 0.19	$ 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	Cumulative effect of accounting changeBRANDYWINE OPERATING PARTNERSHIP, L.P.	Cumulative effect of accounting changeBRANDYWINE OPERATING PARTNERSHIP, L.P.General Partner Capital
Beginning balance (in shares) at Dec. 31, 2018							176,873,324
Beginning Balance at Dec. 31, 2018				$ 1,798,508	$ 4,725	$ 2,192	$ 1,791,591	$ (5,336)	$ (5,336)
Net income	$ 4,583		$ 60	4,583		34	$ 4,549
Other comprehensive income (loss)	(2,483)	$ (2,469)	(14)	(2,483)	(2,483)
Deferred compensation obligation (in shares)							(458)
Deferred compensation obligation	0			0
Repurchase and retirement of LP units (in shares)							(1,337,169)
Repurchase and retirement of LP units				(17,281)			$ (17,281)
Repurchase and retirement of Common Shares of Beneficial Interest	22		22	22		22
Share-based compensation activity (in shares)							465,883
Share-based compensation activity	3,677			3,677			$ 3,677
Adjustment of redeemable partnership units to liquidation value at period end				(3,088)			(3,088)
Distributions declared to general partnership unitholders				(33,560)			$ (33,560)
Ending balance (in shares) at Mar. 31, 2019							176,001,580
Ending Balance at Mar. 31, 2019				1,745,042	2,242	2,248	$ 1,740,552
Beginning balance (in shares) at Dec. 31, 2018							176,873,324
Beginning Balance at Dec. 31, 2018				1,798,508	4,725	2,192	$ 1,791,591	$ (5,336)	$ (5,336)
Net income	10,835			10,835
Other comprehensive income (loss)	(7,229)			(7,229)
Ending balance (in shares) at Jun. 30, 2019							176,197,883
Ending Balance at Jun. 30, 2019				1,715,445	(2,504)	2,264	$ 1,715,685
Beginning balance (in shares) at Mar. 31, 2019							176,001,580
Beginning Balance at Mar. 31, 2019				1,745,042	2,242	2,248	$ 1,740,552
Net income	6,252		47	6,252		13	$ 6,239
Other comprehensive income (loss)	(4,746)	(4,720)	(26)	(4,746)	(4,746)
Deferred compensation obligation (in shares)							100,908
Deferred compensation obligation	0			0
Repurchase and retirement of LP units (in shares)							1,245
Repurchase and retirement of LP units				0
Repurchase and retirement of Common Shares of Beneficial Interest	3		3	3		3
Share-based compensation activity (in shares)							94,150
Share-based compensation activity	1,451			1,451			$ 1,451
Adjustment of redeemable partnership units to liquidation value at period end				1,014			1,014
Distributions declared to general partnership unitholders				(33,571)			$ (33,571)
Ending balance (in shares) at Jun. 30, 2019							176,197,883
Ending Balance at Jun. 30, 2019				1,715,445	(2,504)	2,264	$ 1,715,685
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)
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, 2019							176,480,095
Beginning Balance at Dec. 31, 2019				1,672,915	(2,715)	1,091	$ 1,674,539
Net income	12,107			12,107
Other comprehensive income (loss)	(7,643)			(7,643)
Ending balance (in shares) at Jun. 30, 2020							170,573,159
Ending Balance at Jun. 30, 2020				1,560,312	(10,358)	1,113	$ 1,569,557
Beginning balance (in shares) at Mar. 31, 2020							170,965,987
Beginning Balance at Mar. 31, 2020				1,593,833	(10,584)	1,103	$ 1,603,314
Net income	4,020		24	4,020		10	$ 4,010
Other comprehensive income (loss)	226	$ 225	$ 1	226	226
Deferred compensation obligation (in shares)							44,827
Deferred compensation obligation	(11)			(11)			$ (11)
Repurchase and retirement of LP units (in shares)							(604,283)
Repurchase and retirement of LP units							$ (6,141)
Share-based compensation activity (in shares)							166,628
Share-based compensation activity	$ 1,668			1,668			$ 1,668
Adjustment of redeemable partnership units to liquidation value at period end				(743)			(743)
Distributions declared to general partnership unitholders				(32,540)			$ (32,540)
Ending balance (in shares) at Jun. 30, 2020							170,573,159
Ending Balance at Jun. 30, 2020				$ 1,560,312	$ (10,358)	$ 1,113	$ 1,569,557

Consolidated Statements of Pa_2

Consolidated Statements of Partners' Equity (Parenthetical) - $ / shares	3 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019
BRANDYWINE OPERATING PARTNERSHIP, L.P. | General Partner Capital
Distributions to general partnership unitholders (USD per share)	$ 0.19	$ 0.19	$ 0.19	$ 0.19

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net income	$ 12,107	$ 10,835
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	101,781	103,111
Amortization of deferred financing costs	1,480	1,332
Amortization of debt discount/(premium), net	(788)	351
Amortization of stock compensation costs	4,462	5,135
Straight-line rent income	(4,416)	(6,425)
Amortization of acquired above (below) market leases, net	(2,617)	(3,494)
Ground rent expense	729	737
Provision for doubtful accounts	345	(24)
Net gain on real estate venture transactions	0	(1,535)
Net gain on sale of interests in real estate	(2,787)	(1,251)
Loss from Real Estate Ventures, net of distributions	4,092	3,857
Income tax provision (benefit)	(226)	46
Changes in assets and liabilities:
Accounts receivable	(4,349)	(665)
Other assets	(3,315)	(7,714)
Accounts payable and accrued expenses	(4,215)	(12,496)
Deferred income, gains and rent	(5,418)	(5,033)
Other liabilities	3,455	(1,311)
Net cash provided by operating activities	100,320	85,456
Cash flows from investing activities:
Acquisition of properties	(11,432)	0
Proceeds from the sale of properties	21,250	5,523
Proceeds from real estate venture sales	0	259
Proceeds from repayment of mortgage notes receivable	0	3,341
Capital expenditures for tenant improvements	(27,834)	(36,046)
Capital expenditures for redevelopments	(14,686)	(18,436)
Capital expenditures for developments	(33,566)	(39,155)
Advances for the purchase of tenant assets, net of repayments	1,563	(627)
Investment in unconsolidated Real Estate Ventures	(199)	(182)
Deposits for real estate	0	2,053
Capital distributions from Real Estate Ventures	3,575	33,817
Leasing costs paid	(13,998)	(9,440)
Net cash used in investing activities	(75,327)	(58,893)
Cash flows from financing activities:
Repayments of mortgage notes payable	(3,909)	(3,761)
Proceeds from credit facility borrowings	132,500	260,500
Repayments of credit facility borrowings	(71,500)	(189,500)
Proceeds from the exercise of stock options	47	800
Shares used for employee taxes upon vesting of share awards	(1,346)	(1,554)
Partner contributions to consolidated real estate venture	0	25
Repurchase and retirement of common shares	(60,000)	(17,282)
Distributions paid to shareholders	(66,107)	(66,649)
Distributions to noncontrolling interest	(374)	(373)
Net cash used in financing activities	(70,689)	(17,794)
Increase/(Decrease) in cash and cash equivalents and restricted cash	(45,696)	8,769
Cash and cash equivalents and restricted cash at beginning of year	91,170	23,211
Cash and cash equivalents and restricted cash at end of period	45,474	31,980
Reconciliation of cash and cash equivalents and restricted cash:
Cash and cash equivalents, beginning of period	90,499	22,842
Restricted cash, beginning of period	671	369
Cash and cash equivalents and restricted cash at beginning of year	91,170	23,211
Cash and cash equivalents, end of period	44,819	31,573
Restricted cash, end of period	655	407
Cash and cash equivalents and restricted cash at end of period	45,474	31,980
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the six months ended June 30, 2020 and 2019 of $2,341 and $1,465, respectively	42,994	41,842
Cash paid for income taxes	483	938
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid	32,747	34,113
Change in investment in real estate ventures as a result of dispositions	0	1,276
Change in capital expenditures financed through accounts payable at period end	5,995	(15,351)
Change in capital expenditures financed through retention payable at period end	222	(3,643)
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Cash flows from operating activities:
Net income	12,107	10,835
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	101,781	103,111
Amortization of deferred financing costs	1,480	1,332
Amortization of debt discount/(premium), net	(788)	351
Amortization of stock compensation costs	4,462	5,135
Straight-line rent income	(4,416)	(6,425)
Amortization of acquired above (below) market leases, net	(2,617)	(3,494)
Ground rent expense	729	737
Provision for doubtful accounts	345	(24)
Net gain on real estate venture transactions	0	(1,535)
Net gain on sale of interests in real estate	(2,787)	(1,251)
Loss from Real Estate Ventures, net of distributions	4,092	3,857
Income tax provision (benefit)	(226)	46
Changes in assets and liabilities:
Accounts receivable	(4,349)	(665)
Other assets	(3,315)	(7,714)
Accounts payable and accrued expenses	(4,215)	(12,496)
Deferred income, gains and rent	(5,418)	(5,033)
Other liabilities	3,455	(1,311)
Net cash provided by operating activities	100,320	85,456
Cash flows from investing activities:
Acquisition of properties	(11,432)	0
Proceeds from the sale of properties	21,250	5,523
Proceeds from real estate venture sales	0	259
Proceeds from repayment of mortgage notes receivable	0	3,341
Capital expenditures for tenant improvements	(27,834)	(36,046)
Capital expenditures for redevelopments	(14,686)	(18,436)
Capital expenditures for developments	(33,566)	(39,155)
Advances for the purchase of tenant assets, net of repayments	1,563	(627)
Investment in unconsolidated Real Estate Ventures	(199)	(182)
Deposits for real estate	0	2,053
Capital distributions from Real Estate Ventures	3,575	33,817
Leasing costs paid	(13,998)	(9,440)
Net cash used in investing activities	(75,327)	(58,893)
Cash flows from financing activities:
Repayments of mortgage notes payable	(3,909)	(3,761)
Proceeds from credit facility borrowings	132,500	260,500
Repayments of credit facility borrowings	(71,500)	(189,500)
Proceeds from the exercise of stock options	47	800
Shares used for employee taxes upon vesting of share awards	(1,346)	(1,554)
Partner contributions to consolidated real estate venture	0	25
Repurchase and retirement of common shares	(60,000)	(17,282)
Distributions paid to shareholders	(66,481)	(67,022)
Net cash used in financing activities	(70,689)	(17,794)
Increase/(Decrease) in cash and cash equivalents and restricted cash	(45,696)	8,769
Cash and cash equivalents and restricted cash at beginning of year	91,170	23,211
Cash and cash equivalents and restricted cash at end of period	45,474	31,980
Reconciliation of cash and cash equivalents and restricted cash:
Cash and cash equivalents, beginning of period	90,499	22,842
Restricted cash, beginning of period	671	369
Cash and cash equivalents and restricted cash at beginning of year	91,170	23,211
Cash and cash equivalents, end of period	44,819	31,573
Restricted cash, end of period	655	407
Cash and cash equivalents and restricted cash at end of period	45,474	31,980
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the six months ended June 30, 2020 and 2019 of $2,341 and $1,465, respectively	42,994	41,842
Cash paid for income taxes	483	938
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid	32,747	34,113
Change in investment in real estate ventures as a result of dispositions	0	1,276
Change in capital expenditures financed through accounts payable at period end	5,995	(15,351)
Change in capital expenditures financed through retention payable at period end	$ 222	$ (3,643)

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Capitalized interest	$ 2,341	$ 1,465
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Capitalized interest	$ 2,341	$ 1,465

Organization of the Parent Comp

Organization of the Parent Company and The Operating Partnership	6 Months Ended
	Jun. 30, 2020
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 June 30, 2020 , 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 June 30, 2020 , the Company owned 94 properties that contained an aggregate of approximately 16.6 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 June 30, 2020 : Number of Properties Rentable Square Feet Office properties 83 13,585,348 Mixed-use properties 5 780,184 Core Properties 88 14,365,532 Development property 1 204,108 Redevelopment properties 3 120,011 Held for sale properties 2 1,896,142 The Properties 94 16,585,793 In addition to the Properties, as of June 30, 2020 , the Company owned 228.5 acres of land held for development, of which 35.2 acres were held for sale. The Company also held leasehold interests in two land parcels totaling 1.8 acres, each acquired through prepaid 99 -year ground leases, and held options to purchase approximately 55.5 additional acres of undeveloped land. As of June 30, 2020 , 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 14.2 million square feet, of which 0.2 million square feet relates to 35.2 acres held for sale. As of June 30, 2020 , the Company also owned economic interests in seven 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 June 30, 2020 , the management company subsidiaries were managing properties containing an aggregate of approximately 24.1 million net rentable square feet, of which approximately 16.6 million net rentable square feet related to Properties owned by the Company and approximately 7.5 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	6 Months Ended
	Jun. 30, 2020
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 June 30, 2020 , the results of its operations for the three and six months ended June 30, 2020 and 2019 and its cash flows for the six months ended June 30, 2020 and 2019 . 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 2019 Annual Report on Form 10-K filed with the SEC on March 2, 2020. The consolidated balance sheet at December 31, 2019 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, 2019 contains a discussion of our significant accounting policies under Note 2, "Summary of Significant Accounting Policies" . There have been no significant changes in our significant accounting policies since December 31, 2019 . Risks and Uncertainties - COVID-19 Currently, one of the most significant risks and uncertainties is the potential adverse effect of the ongoing global COVID-19 pandemic, which has significantly slowed global economic activity, caused significant volatility in financial markets, and resulted in unprecedented job losses, causing many to fear an imminent global recession. The responses of many countries, including the U.S., have included mandatory quarantines, restrictions on business activities, including construction activities, restrictions on group gatherings, restrictions on travel and mandatory closures. These actions are creating disruption in the global economy and supply chains and adversely impacting many industries, including owners and developers of real estate. Moreover, there is significant uncertainty around the breadth and duration of business disruptions related to COVID-19, as well as its impact on the U.S. economy and consumer confidence. Demand for space at our properties is dependent on a variety of macroeconomic factors, such as employment levels, interest rates, changes in stock market valuations, rent levels and availability of competing space. The extent to which COVID-19 impacts our results will depend on future developments, many of which are highly uncertain and cannot be predicted, including new information which may emerge concerning the severity of COVID-19 and the actions taken to contain it or treat its impact. The COVID-19 pandemic has caused continued negative economic impacts, market volatility, and business disruption, which could negatively impact our tenants’ ability to pay rent, our ability to lease vacant space, and our ability to complete development and redevelopment projects, and these consequences, in turn, could materially impact our results of operations. Accounting Standards Updates On April 10, 2020, the Financial Accounting Standards Board (the "FASB") issued a Staff Q&A to respond to some frequently asked questions about accounting for lease concessions related to the effects of the COVID-19 pandemic. Consequently, for concessions related to the effects of the COVID-19 pandemic, an entity will not have to analyze each contract to determine whether enforceable rights and obligations for concessions exist in the contract and can elect to apply or not apply the lease modification guidance to those contracts. Entities may make the elections for any lessor-provided concessions related to the effects of the COVID-19 pandemic (e.g., deferrals of lease payments, cash payments made to the lessee, reduced future lease payments) as long as the concession does not result in a substantial increase in the rights of the lessor or the obligations of the lessee. The Company has elected to account for lease concessions as though the enforceable rights and obligations for the concessions existed in the original lease. To date, the impact of lease concessions granted has not had a material effect on the financial statements. The Company will continue to evaluate the impact of lease concessions and the appropriate accounting for those concessions. 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. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments Credit Losses (Topic 326), which changes how entities measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. The guidance replaces the current incurred loss model with an expected loss approach, resulting in more timely recognition of such losses. In November 2018, the FASB released ASU 2018-19, Codification Improvements to Topic 326, Financial Instrument - Credit Losses, which clarifies that receivables arising from operating leases are not within the scope of Subtopic 326-20. The guidance was effective for the Company as of January 1, 2020. The Company adopted ASU 2016-13 effective January 1, 2020 and it did not have a material impact on the consolidated financial statements.

Real Estate Investments

Real Estate Investments	6 Months Ended
	Jun. 30, 2020
Real Estate [Abstract]
REAL ESTATE INVESTMENTS	3. REAL ESTATE INVESTMENTS As of June 30, 2020 and December 31, 2019 , the gross carrying value of the operating properties was as follows (in thousands): June 30, 2020 December 31, 2019 Land $ 435,971 $ 489,702 Building and improvements 2,800,024 3,049,395 Tenant improvements 414,526 467,362 Operating properties $ 3,650,521 $ 4,006,459 Assets held for sale - real estate investments 327,286 — Total $ 3,977,807 $ 4,006,459 Acquisitions The following table summarizes the property acquisitions during the six months ended June 30, 2020 (dollars in thousands): Property/Portfolio Name Acquisition Date Location Property Type Rentable Square Feet/Acres Purchase Price 145 King of Prussia Road February 27, 2020 Radnor, PA Land 7.75 acres $ 11,250 Dispositions The following table summarizes the property dispositions during the six months ended June 30, 2020 (dollars in thousands): Property/Portfolio Name Disposition Date Location Property Type Rentable Square Feet/Acres Sales Price Gain/(Loss) on Sale (a) 52 East Swedesford Road March 19, 2020 Malvern, PA Office 131,077 $ 18,000 $ 2,336 Keith Valley June 15, 2020 Horsham, PA Land 14.0 Acres $ 4,000 $ 201 (a) Gain/(Loss) on Sale is net of closing and other transaction related costs. Held for Sale The following is a summary of properties classified as held for sale at June 30, 2020 (in thousands): Held for Sale Properties June 30, 2020 Philadelphia - Office (a) Other - Land (b) Total ASSETS HELD FOR SALE Real estate investments: Operating properties $ 327,286 $ — $ 327,286 Accumulated depreciation (59,519 ) — (59,519 ) Operating real estate investments, net 267,767 — 267,767 Construction-in-progress 1,881 — 1,881 Land held for development, net — 7,349 7,349 Total real estate investments, net 269,648 7,349 276,997 Deferred costs, net 10,888 — 10,888 Intangible assets, net 12,497 — 12,497 Other assets 101 — 101 Total assets held for sale, net $ 293,134 $ 7,349 $ 300,483 LIABILITIES HELD FOR SALE Mortgage notes payable, net $ 220,720 $ — $ 220,720 Deferred income, gains and rent 4,119 — 4,119 Intangible liabilities, net 613 — 613 Other liabilities 541 — 541 Total liabilities held for sale, net $ 225,993 $ — $ 225,993 (a) As of June 30, 2020 , the Company determined that the sale of One Commerce Square and Two Commerce Square in the Philadelphia CBD segment, through a real estate venture transaction, was probable and classified these properties as held for sale. The fair value less the anticipated costs of sale of the properties exceeded the carrying values. The fair value of the properties is based on the pricing in the purchase and contribution agreement. See Note 15, ''Subsequent Events " for further information. (b) As of June 30, 2020, the Company determined that the sale of two parcels of land within the Other segment totaling 35.2 acres was probable and classified these properties as held for sale. As of June 30, 2020 , the fair value less the anticipated costs of sale of the properties exceeded the carrying values. The fair value of the properties is based on the pricing in the purchase and sale agreement. As of December 31, 2019, the Company determined that the sale of two parcels of land within the Other segment totaling 35.2 acres was probable and classified these properties as held for sale. As such, $7.3 million

Investment in Unconsolidated Re

Investment in Unconsolidated Real Estate Ventures	6 Months Ended
	Jun. 30, 2020
Equity Method Investments and Joint Ventures [Abstract]
INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES	4. INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES As of June 30, 2020 , the Company held ownership interests in seven unconsolidated real estate ventures for an aggregate investment balance of $113.1 million , which includes a negative investment balance in one unconsolidated real estate venture, reflected within 'Other liabilities' in the consolidated balance sheets. As of June 30, 2020 , three of the real estate ventures owned properties that contained an aggregate of approximately 5.4 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 1.3 acres of land in active development; 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 its Real Estate Ventures of $0.8 million and $2.0 million for the three and six months ended June 30, 2020 , respectively, and $1.1 million and $2.2 million for the three and six months ended June 30, 2019 , respectively. The Company earned leasing commission income from its Real Estate Ventures of $0.2 million and $0.6 million for the three and six months ended June 30, 2020 , respectively, and $0.3 million and $0.5 million for the three and six months ended June 30, 2019 , respectively. The Company had outstanding accounts receivable balances from its Real Estate Ventures of $0.8 million as of both June 30, 2020 and December 31, 2019 . 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 June 30, 2020 and December 31, 2019 (in thousands): June 30, 2020 MAP Venture Other Total Net property $ 186,865 $ 651,223 $ 838,088 Other assets 251,765 85,123 336,888 Other liabilities 266,383 15,706 282,089 Debt, net 182,279 426,988 609,267 Equity (a) (10,032 ) 293,652 283,620 December 31, 2019 MAP Venture Other Total Net property $ 192,582 $ 641,785 $ 834,367 Other assets 256,453 85,549 342,002 Other liabilities 266,200 23,871 290,071 Debt, net 181,525 403,543 585,068 Equity (a) 1,310 299,920 301,230 (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 and six -month periods ended June 30, 2020 and 2019 (in thousands): Three Months Ended June 30, 2020 MAP Venture Other Total Revenue $ 16,281 $ 15,013 $ 31,294 Operating expenses (12,016 ) (5,990 ) (18,006 ) Interest expense, net (1,831 ) (3,324 ) (5,155 ) Depreciation and amortization (5,756 ) (6,870 ) (12,626 ) Net loss $ (3,322 ) $ (1,171 ) $ (4,493 ) Ownership interest % 50 % Various Various Company's share of net loss $ (1,661 ) $ (553 ) $ (2,214 ) Basis adjustments and other 23 (12 ) 11 Equity in loss of Real Estate Ventures $ (1,638 ) $ (565 ) $ (2,203 ) Three Months Ended June 30, 2019 MAP Venture Other Total Revenue $ 17,796 $ 15,567 $ 33,363 Operating expenses (11,611 ) (5,757 ) (17,368 ) Interest expense, net (2,532 ) (3,788 ) (6,320 ) Depreciation and amortization (6,550 ) (6,922 ) (13,472 ) Net loss $ (2,897 ) $ (900 ) $ (3,797 ) Ownership interest % 50 % Various Various Company's share of net loss $ (1,449 ) $ (59 ) $ (1,508 ) Basis adjustments and other 15 2 17 Equity in loss of Real Estate Ventures $ (1,434 ) $ (57 ) $ (1,491 ) Six Months Ended June 30, 2020 MAP Venture Other Total Revenue $ 33,594 $ 28,851 $ 62,445 Operating expenses (24,243 ) (11,724 ) (35,967 ) Interest expense, net (3,879 ) (6,266 ) (10,145 ) Depreciation and amortization (11,814 ) (13,335 ) (25,149 ) Net loss $ (6,342 ) $ (2,474 ) $ (8,816 ) Ownership interest % 50 % Various Various Company's share of net loss $ (3,171 ) $ (909 ) $ (4,080 ) Basis adjustments and other 12 (26 ) (14 ) Equity in loss of Real Estate Ventures $ (3,159 ) $ (935 ) $ (4,094 ) Six Months Ended June 30, 2019 MAP Venture Other Total Revenue $ 36,084 $ 32,338 $ 68,422 Operating expenses (23,766 ) (12,320 ) (36,086 ) Interest expense, net (5,068 ) (5,172 ) (10,240 ) Depreciation and amortization (12,899 ) (14,285 ) (27,184 ) Net income (loss) $ (5,649 ) $ 561 $ (5,088 ) Ownership interest % 50 % Various Various Company's share of net income (loss) $ (2,825 ) $ 5 $ (2,820 ) Basis adjustments and other (41 ) 12 (29 ) Equity in income (loss) of Real Estate Ventures $ (2,866 ) $ 17 $ (2,849 )

Leases

Leases	6 Months Ended
	Jun. 30, 2020
Leases [Abstract]
LEASES	5. LEASES Lessor Accounting The table below sets forth the allocation of lease revenue between fixed contractual payments and variable lease payments for the three and six months ended June 30, 2020 and 2019 (in thousands): Three Months Ended June 30, Three Months Ended June 30, Six Months Ended June 30, Six Months Ended June 30, Lease Revenue 2020 2019 2020 2019 Fixed contractual payments $ 101,994 $ 105,277 $ 206,395 $ 209,926 Variable lease payments 27,469 27,783 58,108 56,514 Total $ 129,463 $ 133,060 $ 264,503 $ 266,440

Intangible Assets and Liabiliti

Intangible Assets and Liabilities	6 Months Ended
	Jun. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
INTANGIBLE ASSETS AND LIABILITIES	6. INTANGIBLE ASSETS AND LIABILITIES As of June 30, 2020 and December 31, 2019 , the Company’s intangible assets/liabilities were comprised of the following (in thousands): June 30, 2020 Total Cost Accumulated Amortization Intangible Assets, net Intangible assets, net: In-place lease value $ 144,957 $ (78,187 ) $ 66,770 Tenant relationship value 5,142 (4,859 ) 283 Above market leases acquired 4,685 (3,979 ) 706 154,784 (87,025 ) 67,759 Assets held for sale (57,465 ) 44,968 (12,497 ) Total intangible assets, net $ 97,319 $ (42,057 ) $ 55,262 Total Cost Accumulated Amortization Intangible Liabilities, net Intangible liabilities, net: Below market leases acquired $ 34,751 $ (15,561 ) $ 19,190 Assets held for sale (5,225 ) 4,612 (613 ) Total intangible liabilities, net $ 29,526 $ (10,949 ) $ 18,577 December 31, 2019 Total Cost Accumulated Amortization Intangible Assets, net Intangible assets, net: In-place lease value $ 167,357 $ (84,123 ) $ 83,234 Tenant relationship value 5,268 (4,815 ) 453 Above market leases acquired 4,956 (3,792 ) 1,164 Total intangible assets, net $ 177,581 $ (92,730 ) $ 84,851 Total Cost Accumulated Amortization Intangible Liabilities, net Intangible liabilities, net: Below market leases acquired $ 44,757 $ (22,494 ) $ 22,263 As of June 30, 2020 , the Company’s annual amortization for its intangible assets/liabilities, assuming no prospective early lease terminations, was as follows (dollars in thousands): Assets Liabilities 2020 (six months remaining) $ 8,768 $ 2,057 2021 14,816 3,615 2022 9,652 2,079 2023 7,567 1,652 2024 5,214 1,425 Thereafter 21,742 8,362 67,759 19,190 Assets held for sale (12,497 ) (613 ) Total $ 55,262 $ 18,577

Debt Obligations

Debt Obligations	6 Months Ended
	Jun. 30, 2020
Debt Disclosure [Abstract]
DEBT OBLIGATIONS	7. DEBT OBLIGATIONS The following table sets forth information regarding the Company’s consolidated debt obligations outstanding as of June 30, 2020 and December 31, 2019 (in thousands): June 30, 2020 December 31, 2019 Effective Interest Rate Maturity Date MORTGAGE DEBT: Two Logan Square $ 80,226 $ 81,103 3.98% August 2020 Four Tower Bridge 9,169 9,291 4.50% February 2021 One Commerce Square (a) 114,715 116,571 3.64% April 2023 Two Commerce Square (a) 107,418 108,472 4.51% April 2023 Principal balance outstanding 311,528 315,437 Plus: fair market value premium (discount), net (1,195 ) (1,383 ) Less: deferred financing costs (178 ) (242 ) Mortgage indebtedness $ 310,155 $ 313,812 Assets held for sale - mortgage indebtedness, net (a) (220,720 ) — Total mortgage indebtedness $ 89,435 $ 313,812 UNSECURED DEBT $600 million Unsecured Credit Facility $ 61,000 $ — LIBOR + 1.10% July 2022 Seven-Year Term Loan - Swapped to fixed 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) - Swapped to fixed 25,774 25,774 3.30% April 2035 Indenture II (Preferred Trust II) 25,774 25,774 LIBOR + 1.25% July 2035 Principal balance outstanding 1,889,610 1,828,610 Plus: original issue premium (discount), net 11,114 12,090 Less: deferred financing costs (9,124 ) (10,094 ) Total unsecured indebtedness $ 1,891,600 $ 1,830,606 Total Debt Obligations $ 1,981,035 $ 2,144,418 (a) The properties encumbered by these mortgages were classified as held for sale as of June 30, 2020 and, given that these debt obligations will remain with the properties after the transaction, they are included in "Liabilities related to assets held for sale, net" on the consolidated balance sheets as of June 30, 2020. In addition to the debt described above, 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 six months ended June 30, 2020 , the weighted-average interest rate on Unsecured Credit Facility borrowings was 1.6% resulting in a nominal amount of interest expense. As of June 30, 2020 , the effective interest rate on Unsecured Credit Facility borrowings was 1.3% . 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 June 30, 2020 . Certain of the covenants restrict the Company’s ability to obtain alternative sources of capital. As of June 30, 2020 , the Company’s aggregate scheduled principal payments of debt obligations are as follows (in thousands): 2020 (six months remaining) $ 83,317 2021 15,143 2022 317,332 2023 556,736 2024 350,000 Thereafter 878,610 Total principal payments 2,201,138 Net unamortized premiums/(discounts) 9,918 Net deferred financing costs (9,301 ) Outstanding indebtedness 2,201,755 Assets held for sale - mortgage indebtedness, net (a) (220,720 ) Outstanding indebtedness less liabilities of assets held for sale $ 1,981,035 (a) Included in the table above are principal payments of $3.0 million for 2020, $6.1 million for 2021, $6.3 million for 2022, $206.7 million for 2023, an unamortized discount of $1.2 million and deferred financing costs of $0.2 million

Fair Value of Financial Instrum

Fair Value of Financial Instruments	6 Months Ended
	Jun. 30, 2020
Fair Value Disclosures [Abstract]
FAIR VALUE OF FINANCIAL INSTRUMENTS	8. 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 June 30, 2020 and December 31, 2019 , 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 June 30, 2020 and December 31, 2019 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): June 30, 2020 December 31, 2019 Carrying Amount (a) Fair Value Carrying Amount (a) Fair Value Unsecured notes payable $ 1,503,164 $ 1,548,735 $ 1,503,435 $ 1,591,830 Variable rate debt $ 388,433 $ 369,356 $ 327,171 $ 309,947 Mortgage notes payable $ 310,155 $ 332,553 $ 313,812 $ 317,031 Notes receivable $ 44,430 $ 47,661 $ 44,430 $ 43,322 (a) Net of deferred financing costs of $7.9 million and $8.7 million for unsecured notes payable, $1.2 million and $1.4 million for variable rate debt and $0.2 million for mortgage notes payable as of both June 30, 2020 and December 31, 2019 . On June 26, 2018, the Company provided a $44.4 million mortgage loan to Brandywine 1919 Ventures, an unconsolidated real estate venture in which the Company holds a 50% ownership interest, and recorded a related party note receivable of $44.4 million within 'Other assets' on the consolidated balance sheets. Refer to Note 4, ''Investment in Unconsolidated Real Estate Ventures " to the consolidated financial statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019 for further detail regarding this financing. The Company used quoted market prices as of June 30, 2020 and December 31, 2019 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 June 30, 2020 and December 31, 2019 . 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 June 30, 2020 . Current estimates of fair value may differ from the amounts presented herein.

Derivative Financial Instrument

Derivative Financial Instruments	6 Months Ended
	Jun. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE FINANCIAL INSTRUMENTS	9. DERIVATIVE FINANCIAL INSTRUMENTS The following table summarizes the terms and fair values of the Company’s derivative financial instruments as of June 30, 2020 and December 31, 2019 . 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 6/30/2020 12/31/2019 6/30/2020 12/31/2019 Liabilities Swap Interest Rate Cash Flow (a) $ 250,000 $ 250,000 2.868 % October 8, 2015 October 8, 2022 $ (8,589 ) $ (562 ) Swap Interest Rate Cash Flow (a) 25,774 25,774 3.300 % December 22, 2011 January 30, 2021 (313 ) (94 ) $ 275,774 $ 275,774 (a) Hedging unsecured variable rate debt. 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 June 30, 2020 and December 31, 2019 . 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 June 30, 2020 . 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	6 Months Ended
	Jun. 30, 2020
Noncontrolling Interest [Abstract]
LIMITED PARTNERS' NON-CONTROLLING INTERESTS IN THE PARENT COMPANY	10. 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 $9.1 million and $9.3 million as of June 30, 2020 and December 31, 2019 , 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 $10.7 million and $15.5 million as of June 30, 2020 and December 31, 2019 , respectively.

Beneficiaries Equity of the Par

Beneficiaries Equity of the Parent Company	6 Months Ended
	Jun. 30, 2020
Equity [Abstract]
BENEFICIARIES' EQUITY OF THE PARENT COMPANY	11. 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 June 30, 2020 2019 Basic Diluted Basic Diluted Numerator Net income $ 4,020 $ 4,020 $ 6,252 $ 6,252 Net income attributable to noncontrolling interests (24 ) (24 ) (47 ) (47 ) Nonforfeitable dividends allocated to unvested restricted shareholders (93 ) (93 ) (93 ) (93 ) Net income attributable to common shareholders $ 3,903 $ 3,903 $ 6,112 $ 6,112 Denominator Weighted-average shares outstanding 170,518,095 170,518,095 176,143,206 176,143,206 Contingent securities/Share based compensation — 251,983 — 547,618 Weighted-average shares outstanding 170,518,095 170,770,078 176,143,206 176,690,824 Earnings per Common Share: Net income attributable to common shareholders $ 0.02 $ 0.02 $ 0.03 $ 0.03 Six Months Ended June 30, 2020 2019 Basic Diluted Basic Diluted Numerator Net income $ 12,107 $ 12,107 $ 10,835 $ 10,835 Net income attributable to noncontrolling interests (89 ) (89 ) (107 ) (107 ) Nonforfeitable dividends allocated to unvested restricted shareholders (224 ) (224 ) (212 ) (212 ) Net income attributable to common shareholders $ 11,794 $ 11,794 $ 10,516 $ 10,516 Denominator Weighted-average shares outstanding 173,294,031 173,294,031 176,001,071 176,001,071 Contingent securities/Share based compensation — 311,917 — 577,069 Weighted-average shares outstanding 173,294,031 173,605,948 176,001,071 176,578,140 Earnings per Common Share: Net income attributable to common shareholders $ 0.07 $ 0.07 $ 0.06 $ 0.06 Redeemable common limited partnership units totaling 981,634 at June 30, 2020 and 981,626 at June 30, 2019 , 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 and six months ended June 30, 2020 and 2019 , 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 May 20, 2020 the Parent Company declared a distribution of $0.19 per common share, totaling $32.7 million , which was paid on July 22, 2020 to shareholders of record as of July 8, 2020. 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 six months ended June 30, 2020 , the Company repurchased and retired 6,248,483 common shares at an average price of $9.60 per share, totaling $60.0 million . During the six months ended June 30, 2019 , the Company repurchased and retired 1,337,169 common shares at an average price of $12.92 per share, totaling $17.3 million .

Partners Equity of The Operatin

Partners Equity of The Operating Partnership	6 Months Ended
	Jun. 30, 2020
Equity [Abstract]
PARTNERS' EQUITY OF THE OPERATING PARTNERSHIP	12. 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 June 30, 2020 2019 Basic Diluted Basic Diluted Numerator Net income $ 4,020 $ 4,020 $ 6,252 $ 6,252 Net income attributable to noncontrolling interests (10 ) (10 ) (13 ) (13 ) Nonforfeitable dividends allocated to unvested restricted unitholders (93 ) (93 ) (93 ) (93 ) Net income attributable to common unitholders $ 3,917 $ 3,917 $ 6,146 $ 6,146 Denominator Weighted-average units outstanding 171,499,729 171,499,729 177,125,064 177,125,064 Contingent securities/Share based compensation — 251,983 — 547,619 Total weighted-average units outstanding 171,499,729 171,751,712 177,125,064 177,672,683 Earnings per Common Partnership Unit: Net income attributable to common unitholders 0.02 0.02 0.03 0.03 Six Months Ended June 30, 2020 2019 Basic Diluted Basic Diluted Numerator Net income $ 12,107 $ 12,107 $ 10,835 $ 10,835 Net income attributable to noncontrolling interests (22 ) (22 ) (47 ) (47 ) Nonforfeitable dividends allocated to unvested restricted unitholders (224 ) (224 ) (212 ) (212 ) Net income attributable to common unitholders $ 11,861 $ 11,861 $ 10,576 $ 10,576 Denominator Weighted-average units outstanding 174,275,665 174,275,665 176,983,433 176,983,433 Contingent securities/Share based compensation — 311,917 — 577,069 Total weighted-average units outstanding 174,275,665 174,587,582 176,983,433 177,560,502 Earnings per Common Partnership Unit: Net income attributable to common unitholders $ 0.07 $ 0.07 $ 0.06 $ 0.06 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 and six months ended June 30, 2020 and 2019 , 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 May 20, 2020 the Operating Partnership declared a distribution of $0.19 per common partnership unit, totaling $32.7 million , which was paid on July 22, 2020 to unitholders of record as of July 8, 2020. In connection with the Parent Company’s common share repurchase program, one common unit of the Operating Partnership is retired for each common share repurchased. During the six months ended June 30, 2020 , the Company retired 6,248,483 common partnership units at an average price of $9.60 per unit, totaling $60.0 million , in connection with an equal number of common share repurchases. During the six months ended June 30, 2019 , the Company retired 1,337,169 common partnership units at an average price of $12.92 per unit, totaling $17.3 million

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2020
Segment Reporting [Abstract]
SEGMENT INFORMATION	13. SEGMENT INFORMATION As of June 30, 2020 , 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: June 30, 2020 December 31, 2019 Philadelphia CBD (a) $ 1,384,550 $ 1,726,299 Pennsylvania Suburbs 987,069 1,003,890 Austin, Texas 722,710 721,255 Metropolitan Washington, D.C. 469,091 468,035 Other 87,101 86,980 $ 3,650,521 $ 4,006,459 Assets held for sale (a) 327,286 — Operating Properties $ 3,977,807 $ 4,006,459 Right of use asset - operating leases, net $ 21,315 $ 21,656 Corporate Construction-in-progress $ 235,475 $ 180,718 Land held for development (b) $ 112,420 $ 96,124 Prepaid leasehold interests in land held for development, net (c) $ 39,389 $ 39,592 (a) As of June 30, 2020, two properties in the Philadelphia CBD segment were classified as held for sale. See Note 3, “Real Estate Investments,” for further information. (b) Does not include 35.2 acres of land classified as held for sale as of June 30, 2020 and December 31, 2019 . (c) Includes leasehold interests in prepaid 99 -year ground leases at 3025 and 3001-3003 JFK Boulevard, in Philadelphia, Pennsylvania as of June 30, 2020 and December 31, 2019 . Net operating income: Three Months Ended June 30, 2020 2019 Total revenue Operating expenses (a) Net operating income (loss) Total revenue Operating expenses (a) Net operating income Philadelphia CBD $ 62,648 $ (22,895 ) $ 39,753 $ 64,956 $ (25,353 ) $ 39,603 Pennsylvania Suburbs 34,683 (11,161 ) 23,522 34,299 (11,808 ) 22,491 Austin, Texas 25,012 (9,943 ) 15,069 26,188 (9,804 ) 16,384 Metropolitan Washington, D.C. 10,091 (4,930 ) 5,161 13,673 (6,339 ) 7,334 Other 3,381 (2,367 ) 1,014 3,464 (2,390 ) 1,074 Corporate 1,022 (1,186 ) (164 ) 1,571 (1,528 ) 43 Operating properties $ 136,837 $ (52,482 ) $ 84,355 $ 144,151 $ (57,222 ) $ 86,929 Six Months Ended June 30, 2020 2019 Total revenue Operating expenses (a) Net operating income (loss) Total revenue Operating expenses (a) Net operating income (loss) Philadelphia CBD $ 128,563 $ (47,093 ) $ 81,470 $ 130,754 $ (50,538 ) 80,216 Pennsylvania Suburbs 71,920 (23,839 ) 48,081 69,926 (24,799 ) 45,127 Austin, Texas 51,593 (20,088 ) 31,505 50,954 (18,880 ) 32,074 Metropolitan Washington, D.C. 20,845 (10,442 ) 10,403 27,193 (12,543 ) 14,650 Other 7,033 (5,060 ) 1,973 6,646 (4,535 ) 2,111 Corporate 1,971 (2,870 ) (899 ) 2,574 (3,327 ) (753 ) Operating properties $ 281,925 $ (109,392 ) $ 172,533 $ 288,047 $ (114,622 ) $ 173,425 (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 June 30, Six Months Ended June 30, June 30, 2020 December 31, 2019 2020 2019 2020 2019 Philadelphia CBD $ 16,611 $ 17,524 $ 83 $ 84 $ 161 $ 162 Metropolitan Washington, D.C. 101,947 102,840 (647 ) (260 ) (1,096 ) (435 ) MAP Venture (a) (5,503 ) (70 ) (1,639 ) (1,445 ) (3,159 ) (2,812 ) Other — — — 130 — 236 Total $ 113,055 $ 120,294 $ (2,203 ) $ (1,491 ) $ (4,094 ) $ (2,849 ) (a) Included in Other liabilities on the consolidated balance sheets. 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 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 June 30, Six Months Ended June 30, 2020 2019 2020 2019 Net income $ 4,020 $ 6,252 $ 12,107 $ 10,835 Plus: Interest expense 20,191 20,516 40,200 40,873 Interest expense - amortization of deferred financing costs 731 666 1,480 1,332 Depreciation and amortization 49,743 51,667 101,781 103,111 General and administrative expenses 8,343 8,399 16,904 18,243 Equity in loss of Real Estate Ventures 2,203 1,491 4,094 2,849 Less: Interest income 445 553 1,020 1,078 Income tax (provision) benefit 230 (17 ) 226 (46 ) Net gain on disposition of real estate — — 2,586 — Net gain on sale of undepreciated real estate 201 250 201 1,251 Net gain on real estate venture transactions — 1,276 — 1,535 Consolidated net operating income $ 84,355 $ 86,929 $ 172,533 $ 173,425

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	14. 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. Letters-of-Credit Under certain mortgages, the Company has funded required leasing and capital reserve accounts for the benefit of the mortgage lenders with letters-of-credit. There were no letters-of-credit for a mortgage lender as of June 30, 2020 . Certain of the tenant rents at properties that secure these mortgage loans are deposited into the loan servicer’s depository accounts, which are used to fund debt service, operating expenses, capital expenditures and the escrow and reserve accounts, as necessary. Any excess cash is included in cash and cash equivalents. 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 June 30, 2020 , the Company’s Real Estate Ventures had aggregate indebtedness of $618.9 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 June 30, 2020 , 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, with rights of contribution among partners or members in the real estate ventures, as well as customary environmental indemnities and guarantees of customary exceptions to nonrecourse provisions in loan agreements. Other Commitments or Contingencies In connection with the Schuylkill Yards Project, the Company entered into a neighborhood engagement program and, as of June 30, 2020 , had $8.3 million of future fixed contractual obligations. The Company also committed to fund additional contributions under the program. As of June 30, 2020 , the Company estimates that these additional contributions, which are not fixed under the terms of agreement, will be $2.7 million . As of June 30, 2020 , the Company was under contract to acquire an office property containing approximately 170,000 rentable square feet located in Radnor, Pennsylvania for a purchase price of $20.3 million . The Company has paid $1.0 million towards the purchase price in the form of a non-refundable deposit and the transaction is expected to close during 2020. 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.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2020
Subsequent Events [Abstract]
Subsequent Events	15. SUBSEQUENT EVENTS On July 21, 2020, the Company sold a 30% preferred equity interest in One Commerce Square and Two Commerce Square in Philadelphia, PA for $115.0 million , which resulted in deconsolidation of the properties. The properties held by the newly formed joint venture remain encumbered by the existing $222.1 million mortgage. The transaction generated cash proceeds of $100.8 million , net of seller credits and closing costs. Additionally, we will record our investment at fair value and expect to recognize a gain on the transaction in excess of $270.0 million , subject to final closing settlements and accounting adjustments, during the three months ended September 30, 2020.

Basis of Presentation (Policies

Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2020
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 June 30, 2020 , the results of its operations for the three and six months ended June 30, 2020 and 2019 and its cash flows for the six months ended June 30, 2020 and 2019 . 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 2019 Annual Report on Form 10-K filed with the SEC on March 2, 2020. The consolidated balance sheet at December 31, 2019 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, 2019 contains a discussion of our significant accounting policies under Note 2, "Summary of Significant Accounting Policies" . There have been no significant changes in our significant accounting policies since December 31, 2019 .
Significant Risks and Uncertainties	Risks and Uncertainties - COVID-19 Currently, one of the most significant risks and uncertainties is the potential adverse effect of the ongoing global COVID-19 pandemic, which has significantly slowed global economic activity, caused significant volatility in financial markets, and resulted in unprecedented job losses, causing many to fear an imminent global recession. The responses of many countries, including the U.S., have included mandatory quarantines, restrictions on business activities, including construction activities, restrictions on group gatherings, restrictions on travel and mandatory closures. These actions are creating disruption in the global economy and supply chains and adversely impacting many industries, including owners and developers of real estate. Moreover, there is significant uncertainty around the breadth and duration of business disruptions related to COVID-19, as well as its impact on the U.S. economy and consumer confidence. Demand for space at our properties is dependent on a variety of macroeconomic factors, such as employment levels, interest rates, changes in stock market valuations, rent levels and availability of competing space. The extent to which COVID-19 impacts our results will depend on future developments, many of which are highly uncertain and cannot be predicted, including new information which may emerge concerning the severity of COVID-19 and the actions taken to contain it or treat its impact. The COVID-19 pandemic has caused continued negative economic impacts, market volatility, and business disruption, which could negatively impact our tenants’ ability to pay rent, our ability to lease vacant space, and our ability to complete development and redevelopment projects, and these consequences, in turn, could materially impact our results of operations.
Adoption of New Accounting Guidance	Currently, one of the most significant risks and uncertainties is the potential adverse effect of the ongoing global COVID-19 pandemic, which has significantly slowed global economic activity, caused significant volatility in financial markets, and resulted in unprecedented job losses, causing many to fear an imminent global recession. The responses of many countries, including the U.S., have included mandatory quarantines, restrictions on business activities, including construction activities, restrictions on group gatherings, restrictions on travel and mandatory closures. These actions are creating disruption in the global economy and supply chains and adversely impacting many industries, including owners and developers of real estate. Moreover, there is significant uncertainty around the breadth and duration of business disruptions related to COVID-19, as well as its impact on the U.S. economy and consumer confidence. Demand for space at our properties is dependent on a variety of macroeconomic factors, such as employment levels, interest rates, changes in stock market valuations, rent levels and availability of competing space. The extent to which COVID-19 impacts our results will depend on future developments, many of which are highly uncertain and cannot be predicted, including new information which may emerge concerning the severity of COVID-19 and the actions taken to contain it or treat its impact. The COVID-19 pandemic has caused continued negative economic impacts, market volatility, and business disruption, which could negatively impact our tenants’ ability to pay rent, our ability to lease vacant space, and our ability to complete development and redevelopment projects, and these consequences, in turn, could materially impact our results of operations. Accounting Standards Updates On April 10, 2020, the Financial Accounting Standards Board (the "FASB") issued a Staff Q&A to respond to some frequently asked questions about accounting for lease concessions related to the effects of the COVID-19 pandemic. Consequently, for concessions related to the effects of the COVID-19 pandemic, an entity will not have to analyze each contract to determine whether enforceable rights and obligations for concessions exist in the contract and can elect to apply or not apply the lease modification guidance to those contracts. Entities may make the elections for any lessor-provided concessions related to the effects of the COVID-19 pandemic (e.g., deferrals of lease payments, cash payments made to the lessee, reduced future lease payments) as long as the concession does not result in a substantial increase in the rights of the lessor or the obligations of the lessee. The Company has elected to account for lease concessions as though the enforceable rights and obligations for the concessions existed in the original lease. To date, the impact of lease concessions granted has not had a material effect on the financial statements. The Company will continue to evaluate the impact of lease concessions and the appropriate accounting for those concessions. 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. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments Credit Losses (Topic 326), which changes how entities measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. The guidance replaces the current incurred loss model with an expected loss approach, resulting in more timely recognition of such losses. In November 2018, the FASB released ASU 2018-19, Codification Improvements to Topic 326, Financial Instrument - Credit Losses, which clarifies that receivables arising from operating leases are not within the scope of Subtopic 326-20. The guidance was effective for the Company as of January 1, 2020. The Company adopted ASU 2016-13 effective January 1, 2020 and it did not have a material impact on the consolidated financial statements.

Organization of the Parent Co_2

Organization of the Parent Company and The Operating Partnership (Tables)	6 Months Ended
	Jun. 30, 2020
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 June 30, 2020 : Number of Properties Rentable Square Feet Office properties 83 13,585,348 Mixed-use properties 5 780,184 Core Properties 88 14,365,532 Development property 1 204,108 Redevelopment properties 3 120,011 Held for sale properties 2 1,896,142 The Properties 94 16,585,793

Real Estate Investments (Tables

Real Estate Investments (Tables)	6 Months Ended
	Jun. 30, 2020
Real Estate [Abstract]
Gross Carrying Value of Operating Properties	As of June 30, 2020 and December 31, 2019 , the gross carrying value of the operating properties was as follows (in thousands): June 30, 2020 December 31, 2019 Land $ 435,971 $ 489,702 Building and improvements 2,800,024 3,049,395 Tenant improvements 414,526 467,362 Operating properties $ 3,650,521 $ 4,006,459 Assets held for sale - real estate investments 327,286 — Total $ 3,977,807 $ 4,006,459
Summary of Properties Acquired	The following table summarizes the property acquisitions during the six months ended June 30, 2020 (dollars in thousands): Property/Portfolio Name Acquisition Date Location Property Type Rentable Square Feet/Acres Purchase Price 145 King of Prussia Road February 27, 2020 Radnor, PA Land 7.75 acres $ 11,250
Summary of Properties Sold	The following table summarizes the property dispositions during the six months ended June 30, 2020 (dollars in thousands): Property/Portfolio Name Disposition Date Location Property Type Rentable Square Feet/Acres Sales Price Gain/(Loss) on Sale (a) 52 East Swedesford Road March 19, 2020 Malvern, PA Office 131,077 $ 18,000 $ 2,336 Keith Valley June 15, 2020 Horsham, PA Land 14.0 Acres $ 4,000 $ 201 (a) Gain/(Loss) on Sale is net of closing and other transaction related costs.
Summary of Properties Held For Sale	The following is a summary of properties classified as held for sale at June 30, 2020 (in thousands): Held for Sale Properties June 30, 2020 Philadelphia - Office (a) Other - Land (b) Total ASSETS HELD FOR SALE Real estate investments: Operating properties $ 327,286 $ — $ 327,286 Accumulated depreciation (59,519 ) — (59,519 ) Operating real estate investments, net 267,767 — 267,767 Construction-in-progress 1,881 — 1,881 Land held for development, net — 7,349 7,349 Total real estate investments, net 269,648 7,349 276,997 Deferred costs, net 10,888 — 10,888 Intangible assets, net 12,497 — 12,497 Other assets 101 — 101 Total assets held for sale, net $ 293,134 $ 7,349 $ 300,483 LIABILITIES HELD FOR SALE Mortgage notes payable, net $ 220,720 $ — $ 220,720 Deferred income, gains and rent 4,119 — 4,119 Intangible liabilities, net 613 — 613 Other liabilities 541 — 541 Total liabilities held for sale, net $ 225,993 $ — $ 225,993 (a) As of June 30, 2020 , the Company determined that the sale of One Commerce Square and Two Commerce Square in the Philadelphia CBD segment, through a real estate venture transaction, was probable and classified these properties as held for sale. The fair value less the anticipated costs of sale of the properties exceeded the carrying values. The fair value of the properties is based on the pricing in the purchase and contribution agreement. See Note 15, ''Subsequent Events " for further information. (b) As of June 30, 2020, the Company determined that the sale of two parcels of land within the Other segment totaling 35.2 acres was probable and classified these properties as held for sale. As of June 30, 2020 , the fair value less the anticipated costs of sale of the properties exceeded the carrying values. The fair value of the properties is based on the pricing in the purchase and sale agreement.

Investment in Unconsolidated _2

Investment in Unconsolidated Real Estate Ventures (Tables)	6 Months Ended
	Jun. 30, 2020
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 June 30, 2020 and December 31, 2019 (in thousands): June 30, 2020 MAP Venture Other Total Net property $ 186,865 $ 651,223 $ 838,088 Other assets 251,765 85,123 336,888 Other liabilities 266,383 15,706 282,089 Debt, net 182,279 426,988 609,267 Equity (a) (10,032 ) 293,652 283,620 December 31, 2019 MAP Venture Other Total Net property $ 192,582 $ 641,785 $ 834,367 Other assets 256,453 85,549 342,002 Other liabilities 266,200 23,871 290,071 Debt, net 181,525 403,543 585,068 Equity (a) 1,310 299,920 301,230 (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 and six -month periods ended June 30, 2020 and 2019 (in thousands): Three Months Ended June 30, 2020 MAP Venture Other Total Revenue $ 16,281 $ 15,013 $ 31,294 Operating expenses (12,016 ) (5,990 ) (18,006 ) Interest expense, net (1,831 ) (3,324 ) (5,155 ) Depreciation and amortization (5,756 ) (6,870 ) (12,626 ) Net loss $ (3,322 ) $ (1,171 ) $ (4,493 ) Ownership interest % 50 % Various Various Company's share of net loss $ (1,661 ) $ (553 ) $ (2,214 ) Basis adjustments and other 23 (12 ) 11 Equity in loss of Real Estate Ventures $ (1,638 ) $ (565 ) $ (2,203 ) Three Months Ended June 30, 2019 MAP Venture Other Total Revenue $ 17,796 $ 15,567 $ 33,363 Operating expenses (11,611 ) (5,757 ) (17,368 ) Interest expense, net (2,532 ) (3,788 ) (6,320 ) Depreciation and amortization (6,550 ) (6,922 ) (13,472 ) Net loss $ (2,897 ) $ (900 ) $ (3,797 ) Ownership interest % 50 % Various Various Company's share of net loss $ (1,449 ) $ (59 ) $ (1,508 ) Basis adjustments and other 15 2 17 Equity in loss of Real Estate Ventures $ (1,434 ) $ (57 ) $ (1,491 ) Six Months Ended June 30, 2020 MAP Venture Other Total Revenue $ 33,594 $ 28,851 $ 62,445 Operating expenses (24,243 ) (11,724 ) (35,967 ) Interest expense, net (3,879 ) (6,266 ) (10,145 ) Depreciation and amortization (11,814 ) (13,335 ) (25,149 ) Net loss $ (6,342 ) $ (2,474 ) $ (8,816 ) Ownership interest % 50 % Various Various Company's share of net loss $ (3,171 ) $ (909 ) $ (4,080 ) Basis adjustments and other 12 (26 ) (14 ) Equity in loss of Real Estate Ventures $ (3,159 ) $ (935 ) $ (4,094 ) Six Months Ended June 30, 2019 MAP Venture Other Total Revenue $ 36,084 $ 32,338 $ 68,422 Operating expenses (23,766 ) (12,320 ) (36,086 ) Interest expense, net (5,068 ) (5,172 ) (10,240 ) Depreciation and amortization (12,899 ) (14,285 ) (27,184 ) Net income (loss) $ (5,649 ) $ 561 $ (5,088 ) Ownership interest % 50 % Various Various Company's share of net income (loss) $ (2,825 ) $ 5 $ (2,820 ) Basis adjustments and other (41 ) 12 (29 ) Equity in income (loss) of Real Estate Ventures $ (2,866 ) $ 17 $ (2,849 )

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2020
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 and six months ended June 30, 2020 and 2019 (in thousands): Three Months Ended June 30, Three Months Ended June 30, Six Months Ended June 30, Six Months Ended June 30, Lease Revenue 2020 2019 2020 2019 Fixed contractual payments $ 101,994 $ 105,277 $ 206,395 $ 209,926 Variable lease payments 27,469 27,783 58,108 56,514 Total $ 129,463 $ 133,060 $ 264,503 $ 266,440

Intangible Assets and Liabili_2

Intangible Assets and Liabilities (Tables)	6 Months Ended
	Jun. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Intangible Assets and Liabilities	As of June 30, 2020 and December 31, 2019 , the Company’s intangible assets/liabilities were comprised of the following (in thousands): June 30, 2020 Total Cost Accumulated Amortization Intangible Assets, net Intangible assets, net: In-place lease value $ 144,957 $ (78,187 ) $ 66,770 Tenant relationship value 5,142 (4,859 ) 283 Above market leases acquired 4,685 (3,979 ) 706 154,784 (87,025 ) 67,759 Assets held for sale (57,465 ) 44,968 (12,497 ) Total intangible assets, net $ 97,319 $ (42,057 ) $ 55,262 Total Cost Accumulated Amortization Intangible Liabilities, net Intangible liabilities, net: Below market leases acquired $ 34,751 $ (15,561 ) $ 19,190 Assets held for sale (5,225 ) 4,612 (613 ) Total intangible liabilities, net $ 29,526 $ (10,949 ) $ 18,577 December 31, 2019 Total Cost Accumulated Amortization Intangible Assets, net Intangible assets, net: In-place lease value $ 167,357 $ (84,123 ) $ 83,234 Tenant relationship value 5,268 (4,815 ) 453 Above market leases acquired 4,956 (3,792 ) 1,164 Total intangible assets, net $ 177,581 $ (92,730 ) $ 84,851 Total Cost Accumulated Amortization Intangible Liabilities, net Intangible liabilities, net: Below market leases acquired $ 44,757 $ (22,494 ) $ 22,263
Summary of Amortization for Intangible Assets and Liabilities	As of June 30, 2020 , the Company’s annual amortization for its intangible assets/liabilities, assuming no prospective early lease terminations, was as follows (dollars in thousands): Assets Liabilities 2020 (six months remaining) $ 8,768 $ 2,057 2021 14,816 3,615 2022 9,652 2,079 2023 7,567 1,652 2024 5,214 1,425 Thereafter 21,742 8,362 67,759 19,190 Assets held for sale (12,497 ) (613 ) Total $ 55,262 $ 18,577

Debt Obligations (Tables)

Debt Obligations (Tables)	6 Months Ended
	Jun. 30, 2020
Debt Disclosure [Abstract]
Consolidated debt obligations	The following table sets forth information regarding the Company’s consolidated debt obligations outstanding as of June 30, 2020 and December 31, 2019 (in thousands): June 30, 2020 December 31, 2019 Effective Interest Rate Maturity Date MORTGAGE DEBT: Two Logan Square $ 80,226 $ 81,103 3.98% August 2020 Four Tower Bridge 9,169 9,291 4.50% February 2021 One Commerce Square (a) 114,715 116,571 3.64% April 2023 Two Commerce Square (a) 107,418 108,472 4.51% April 2023 Principal balance outstanding 311,528 315,437 Plus: fair market value premium (discount), net (1,195 ) (1,383 ) Less: deferred financing costs (178 ) (242 ) Mortgage indebtedness $ 310,155 $ 313,812 Assets held for sale - mortgage indebtedness, net (a) (220,720 ) — Total mortgage indebtedness $ 89,435 $ 313,812 UNSECURED DEBT $600 million Unsecured Credit Facility $ 61,000 $ — LIBOR + 1.10% July 2022 Seven-Year Term Loan - Swapped to fixed 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) - Swapped to fixed 25,774 25,774 3.30% April 2035 Indenture II (Preferred Trust II) 25,774 25,774 LIBOR + 1.25% July 2035 Principal balance outstanding 1,889,610 1,828,610 Plus: original issue premium (discount), net 11,114 12,090 Less: deferred financing costs (9,124 ) (10,094 ) Total unsecured indebtedness $ 1,891,600 $ 1,830,606 Total Debt Obligations $ 1,981,035 $ 2,144,418 (a) The properties encumbered by these mortgages were classified as held for sale as of June 30, 2020 and, given that these debt obligations will remain with the properties after the transaction, they are included in "Liabilities related to assets held for sale, net" on the consolidated balance sheets as of June 30, 2020.
Schedule of maturities of long-term debt	As of June 30, 2020 , the Company’s aggregate scheduled principal payments of debt obligations are as follows (in thousands): 2020 (six months remaining) $ 83,317 2021 15,143 2022 317,332 2023 556,736 2024 350,000 Thereafter 878,610 Total principal payments 2,201,138 Net unamortized premiums/(discounts) 9,918 Net deferred financing costs (9,301 ) Outstanding indebtedness 2,201,755 Assets held for sale - mortgage indebtedness, net (a) (220,720 ) Outstanding indebtedness less liabilities of assets held for sale $ 1,981,035 (a) Included in the table above are principal payments of $3.0 million for 2020, $6.1 million for 2021, $6.3 million for 2022, $206.7 million for 2023, an unamortized discount of $1.2 million and deferred financing costs of $0.2 million

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2020
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): June 30, 2020 December 31, 2019 Carrying Amount (a) Fair Value Carrying Amount (a) Fair Value Unsecured notes payable $ 1,503,164 $ 1,548,735 $ 1,503,435 $ 1,591,830 Variable rate debt $ 388,433 $ 369,356 $ 327,171 $ 309,947 Mortgage notes payable $ 310,155 $ 332,553 $ 313,812 $ 317,031 Notes receivable $ 44,430 $ 47,661 $ 44,430 $ 43,322 (a) Net of deferred financing costs of $7.9 million and $8.7 million for unsecured notes payable, $1.2 million and $1.4 million for variable rate debt and $0.2 million for mortgage notes payable as of both June 30, 2020 and December 31, 2019 .

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2020
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 June 30, 2020 and December 31, 2019 . 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 6/30/2020 12/31/2019 6/30/2020 12/31/2019 Liabilities Swap Interest Rate Cash Flow (a) $ 250,000 $ 250,000 2.868 % October 8, 2015 October 8, 2022 $ (8,589 ) $ (562 ) Swap Interest Rate Cash Flow (a) 25,774 25,774 3.300 % December 22, 2011 January 30, 2021 (313 ) (94 ) $ 275,774 $ 275,774 (a) Hedging unsecured variable rate debt.

Beneficiaries Equity of the P_2

Beneficiaries Equity of the Parent Company (Tables)	6 Months Ended
	Jun. 30, 2020
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 June 30, 2020 2019 Basic Diluted Basic Diluted Numerator Net income $ 4,020 $ 4,020 $ 6,252 $ 6,252 Net income attributable to noncontrolling interests (24 ) (24 ) (47 ) (47 ) Nonforfeitable dividends allocated to unvested restricted shareholders (93 ) (93 ) (93 ) (93 ) Net income attributable to common shareholders $ 3,903 $ 3,903 $ 6,112 $ 6,112 Denominator Weighted-average shares outstanding 170,518,095 170,518,095 176,143,206 176,143,206 Contingent securities/Share based compensation — 251,983 — 547,618 Weighted-average shares outstanding 170,518,095 170,770,078 176,143,206 176,690,824 Earnings per Common Share: Net income attributable to common shareholders $ 0.02 $ 0.02 $ 0.03 $ 0.03 Six Months Ended June 30, 2020 2019 Basic Diluted Basic Diluted Numerator Net income $ 12,107 $ 12,107 $ 10,835 $ 10,835 Net income attributable to noncontrolling interests (89 ) (89 ) (107 ) (107 ) Nonforfeitable dividends allocated to unvested restricted shareholders (224 ) (224 ) (212 ) (212 ) Net income attributable to common shareholders $ 11,794 $ 11,794 $ 10,516 $ 10,516 Denominator Weighted-average shares outstanding 173,294,031 173,294,031 176,001,071 176,001,071 Contingent securities/Share based compensation — 311,917 — 577,069 Weighted-average shares outstanding 173,294,031 173,605,948 176,001,071 176,578,140 Earnings per Common Share: Net income attributable to common shareholders $ 0.07 $ 0.07 $ 0.06 $ 0.06

Partners Equity of the Operat_2

Partners Equity of the Operating Partnership (Tables)	6 Months Ended
	Jun. 30, 2020
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 June 30, 2020 2019 Basic Diluted Basic Diluted Numerator Net income $ 4,020 $ 4,020 $ 6,252 $ 6,252 Net income attributable to noncontrolling interests (24 ) (24 ) (47 ) (47 ) Nonforfeitable dividends allocated to unvested restricted shareholders (93 ) (93 ) (93 ) (93 ) Net income attributable to common shareholders $ 3,903 $ 3,903 $ 6,112 $ 6,112 Denominator Weighted-average shares outstanding 170,518,095 170,518,095 176,143,206 176,143,206 Contingent securities/Share based compensation — 251,983 — 547,618 Weighted-average shares outstanding 170,518,095 170,770,078 176,143,206 176,690,824 Earnings per Common Share: Net income attributable to common shareholders $ 0.02 $ 0.02 $ 0.03 $ 0.03 Six Months Ended June 30, 2020 2019 Basic Diluted Basic Diluted Numerator Net income $ 12,107 $ 12,107 $ 10,835 $ 10,835 Net income attributable to noncontrolling interests (89 ) (89 ) (107 ) (107 ) Nonforfeitable dividends allocated to unvested restricted shareholders (224 ) (224 ) (212 ) (212 ) Net income attributable to common shareholders $ 11,794 $ 11,794 $ 10,516 $ 10,516 Denominator Weighted-average shares outstanding 173,294,031 173,294,031 176,001,071 176,001,071 Contingent securities/Share based compensation — 311,917 — 577,069 Weighted-average shares outstanding 173,294,031 173,605,948 176,001,071 176,578,140 Earnings per Common Share: Net income attributable to common shareholders $ 0.07 $ 0.07 $ 0.06 $ 0.06
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 June 30, 2020 2019 Basic Diluted Basic Diluted Numerator Net income $ 4,020 $ 4,020 $ 6,252 $ 6,252 Net income attributable to noncontrolling interests (10 ) (10 ) (13 ) (13 ) Nonforfeitable dividends allocated to unvested restricted unitholders (93 ) (93 ) (93 ) (93 ) Net income attributable to common unitholders $ 3,917 $ 3,917 $ 6,146 $ 6,146 Denominator Weighted-average units outstanding 171,499,729 171,499,729 177,125,064 177,125,064 Contingent securities/Share based compensation — 251,983 — 547,619 Total weighted-average units outstanding 171,499,729 171,751,712 177,125,064 177,672,683 Earnings per Common Partnership Unit: Net income attributable to common unitholders 0.02 0.02 0.03 0.03 Six Months Ended June 30, 2020 2019 Basic Diluted Basic Diluted Numerator Net income $ 12,107 $ 12,107 $ 10,835 $ 10,835 Net income attributable to noncontrolling interests (22 ) (22 ) (47 ) (47 ) Nonforfeitable dividends allocated to unvested restricted unitholders (224 ) (224 ) (212 ) (212 ) Net income attributable to common unitholders $ 11,861 $ 11,861 $ 10,576 $ 10,576 Denominator Weighted-average units outstanding 174,275,665 174,275,665 176,983,433 176,983,433 Contingent securities/Share based compensation — 311,917 — 577,069 Total weighted-average units outstanding 174,275,665 174,587,582 176,983,433 177,560,502 Earnings per Common Partnership Unit: Net income attributable to common unitholders $ 0.07 $ 0.07 $ 0.06 $ 0.06

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2020
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: June 30, 2020 December 31, 2019 Philadelphia CBD (a) $ 1,384,550 $ 1,726,299 Pennsylvania Suburbs 987,069 1,003,890 Austin, Texas 722,710 721,255 Metropolitan Washington, D.C. 469,091 468,035 Other 87,101 86,980 $ 3,650,521 $ 4,006,459 Assets held for sale (a) 327,286 — Operating Properties $ 3,977,807 $ 4,006,459 Right of use asset - operating leases, net $ 21,315 $ 21,656 Corporate Construction-in-progress $ 235,475 $ 180,718 Land held for development (b) $ 112,420 $ 96,124 Prepaid leasehold interests in land held for development, net (c) $ 39,389 $ 39,592 (a) As of June 30, 2020, two properties in the Philadelphia CBD segment were classified as held for sale. See Note 3, “Real Estate Investments,” for further information. (b) Does not include 35.2 acres of land classified as held for sale as of June 30, 2020 and December 31, 2019 . (c) Includes leasehold interests in prepaid 99 -year ground leases at 3025 and 3001-3003 JFK Boulevard, in Philadelphia, Pennsylvania as of June 30, 2020 and December 31, 2019 . Net operating income: Three Months Ended June 30, 2020 2019 Total revenue Operating expenses (a) Net operating income (loss) Total revenue Operating expenses (a) Net operating income Philadelphia CBD $ 62,648 $ (22,895 ) $ 39,753 $ 64,956 $ (25,353 ) $ 39,603 Pennsylvania Suburbs 34,683 (11,161 ) 23,522 34,299 (11,808 ) 22,491 Austin, Texas 25,012 (9,943 ) 15,069 26,188 (9,804 ) 16,384 Metropolitan Washington, D.C. 10,091 (4,930 ) 5,161 13,673 (6,339 ) 7,334 Other 3,381 (2,367 ) 1,014 3,464 (2,390 ) 1,074 Corporate 1,022 (1,186 ) (164 ) 1,571 (1,528 ) 43 Operating properties $ 136,837 $ (52,482 ) $ 84,355 $ 144,151 $ (57,222 ) $ 86,929 Six Months Ended June 30, 2020 2019 Total revenue Operating expenses (a) Net operating income (loss) Total revenue Operating expenses (a) Net operating income (loss) Philadelphia CBD $ 128,563 $ (47,093 ) $ 81,470 $ 130,754 $ (50,538 ) 80,216 Pennsylvania Suburbs 71,920 (23,839 ) 48,081 69,926 (24,799 ) 45,127 Austin, Texas 51,593 (20,088 ) 31,505 50,954 (18,880 ) 32,074 Metropolitan Washington, D.C. 20,845 (10,442 ) 10,403 27,193 (12,543 ) 14,650 Other 7,033 (5,060 ) 1,973 6,646 (4,535 ) 2,111 Corporate 1,971 (2,870 ) (899 ) 2,574 (3,327 ) (753 ) Operating properties $ 281,925 $ (109,392 ) $ 172,533 $ 288,047 $ (114,622 ) $ 173,425 (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 June 30, Six Months Ended June 30, June 30, 2020 December 31, 2019 2020 2019 2020 2019 Philadelphia CBD $ 16,611 $ 17,524 $ 83 $ 84 $ 161 $ 162 Metropolitan Washington, D.C. 101,947 102,840 (647 ) (260 ) (1,096 ) (435 ) MAP Venture (a) (5,503 ) (70 ) (1,639 ) (1,445 ) (3,159 ) (2,812 ) Other — — — 130 — 236 Total $ 113,055 $ 120,294 $ (2,203 ) $ (1,491 ) $ (4,094 ) $ (2,849 ) (a) Included in Other liabilities on the consolidated balance sheets.
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 June 30, Six Months Ended June 30, 2020 2019 2020 2019 Net income $ 4,020 $ 6,252 $ 12,107 $ 10,835 Plus: Interest expense 20,191 20,516 40,200 40,873 Interest expense - amortization of deferred financing costs 731 666 1,480 1,332 Depreciation and amortization 49,743 51,667 101,781 103,111 General and administrative expenses 8,343 8,399 16,904 18,243 Equity in loss of Real Estate Ventures 2,203 1,491 4,094 2,849 Less: Interest income 445 553 1,020 1,078 Income tax (provision) benefit 230 (17 ) 226 (46 ) Net gain on disposition of real estate — — 2,586 — Net gain on sale of undepreciated real estate 201 250 201 1,251 Net gain on real estate venture transactions — 1,276 — 1,535 Consolidated net operating income $ 84,355 $ 86,929 $ 172,533 $ 173,425

Organization of The Parent Co_3

Organization of The Parent Company and The Operating Partnership - Textual (Details)	6 Months Ended
	Jun. 30, 2020aft²parcelproperty
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of properties | property	94
Net rentable area (in square feet)	16,585,793
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)	14,200,000
Parent Company | Land Parcel One
Organization of The Parent Company and The Operating Partnership [Line Items]
Lease agreement term	99 years
Parent Company | Land Parcel Two
Organization of The Parent Company and The Operating Partnership [Line Items]
Lease agreement term	99 years
Parent Company | Held-for-sale
Organization of The Parent Company and The Operating Partnership [Line Items]
Total potential development capacity (in square feet)	200,000
Parent Company | Leashold Interest Land
Organization of The Parent Company and The Operating Partnership [Line Items]
Areas of land held for development (in acres) | a	1.8
Number of parcels of land | parcel	2
Wholly-owned Management Company Subsidiaries
Organization of The Parent Company and The Operating Partnership [Line Items]
Net rentable area (in square feet)	24,100,000
Wholly-owned Management Company Subsidiaries | Wholly Owned Properties
Organization of The Parent Company and The Operating Partnership [Line Items]
Net rentable area (in square feet)	16,600,000
Wholly-owned Management Company Subsidiaries | Partially Owned Properties
Organization of The Parent Company and The Operating Partnership [Line Items]
Net rentable area (in square feet)	7,500,000
Brandywine Operating Partnership LP
Organization of The Parent Company and The Operating Partnership [Line Items]
Ownership in the operating partnership	99.40%

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)	Jun. 30, 2020ft²property
Real Estate Properties [Line Items]
Number of properties | property	94
Net rentable area (in square feet) | ft²	16,585,793
Office properties
Real Estate Properties [Line Items]
Number of properties | property	83
Net rentable area (in square feet) | ft²	13,585,348
Mixed-use properties
Real Estate Properties [Line Items]
Number of properties | property	5
Net rentable area (in square feet) | ft²	780,184
Core Properties
Real Estate Properties [Line Items]
Number of properties | property	88
Net rentable area (in square feet) | ft²	14,365,532
Development property
Real Estate Properties [Line Items]
Number of properties | property	1
Net rentable area (in square feet) | ft²	204,108
Redevelopment properties
Real Estate Properties [Line Items]
Number of properties | property	3
Net rentable area (in square feet) | ft²	120,011
Held for sale properties
Real Estate Properties [Line Items]
Number of properties | property	2
Net rentable area (in square feet) | ft²	1,896,142

Real Estate Investments - Gross

Real Estate Investments - Gross Carrying Value of Operating Properties (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Real Estate [Abstract]
Land	$ 435,971	$ 489,702
Building and improvements	2,800,024	3,049,395
Tenant improvements	414,526	467,362
Operating properties	3,650,521	4,006,459
Assets held for sale - real estate investments	327,286	0
Total	$ 3,977,807	$ 4,006,459

Real Estate Investments - Summa

Real Estate Investments - Summary of Properties Acquired (Details) $ in Thousands	Feb. 27, 2020USD ($)a	Jun. 30, 2020USD ($)	Jun. 30, 2019USD ($)
Real Estate [Line Items]
Purchase price		$ 11,432	$ 0
Land | 145 King of Prussia Road
Real Estate [Line Items]
Area of land (in acres) | a	7.75
Purchase price	$ 11,250

Real Estate Investments - Sum_2

Real Estate Investments - Summary of Properties Sold (Details) $ in Thousands	Jun. 15, 2020USD ($)a	Mar. 19, 2020USD ($)ft²	Jun. 30, 2020USD ($)	Jun. 30, 2019USD ($)	Jun. 30, 2020USD ($)	Jun. 30, 2019USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from the sale of properties					$ 21,250	$ 5,523
Gain (loss) on sale			$ 0	$ 0	$ 2,586	$ 0
Office properties | 52 East Swedesford Road
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Rentable area (in square feet) | ft²		131,077
Proceeds from the sale of properties		$ 18,000
Gain (loss) on sale		$ 2,336
Office properties | Keith Valley
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from the sale of properties	$ 4,000
Gain (loss) on sale	$ 201
Land | Keith Valley
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Area of land (in acres) | a	14

Real Estate Investments - Held

Real Estate Investments - Held for Sale (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020USD ($)aparcel	Dec. 31, 2019USD ($)parcel
ASSETS
Operating properties	$ 327,286	$ 0
Accumulated depreciation	(957,189)	(973,318)
Operating real estate investments, net	2,714,647	3,054,797
Construction-in-progress	235,475	180,718
Land held for development	112,420	96,124
Total real estate investments, net	3,101,931	3,371,231
Deferred costs, net	87,811	95,560
Intangible assets, net	55,262	84,851
Other assets	117,959	115,678
Total assets held for sale, net	4,022,770	4,075,969
LIABILITIES
Mortgage notes payable, net	89,435	313,812
Deferred income, gains and rent	24,984	35,284
Intangible liabilities, net	18,577	22,263
Other liabilities	32,104	15,985
Total liabilities held for sale, net	2,451,921	$ 2,387,666
Held-for-sale
ASSETS
Operating properties	327,286
Accumulated depreciation	(59,519)
Operating real estate investments, net	267,767
Construction-in-progress	1,881
Land held for development	7,349
Total real estate investments, net	276,997
Deferred costs, net	10,888
Intangible assets, net	12,497
Other assets	101
Total assets held for sale, net	300,483
LIABILITIES
Mortgage notes payable, net	220,720
Deferred income, gains and rent	4,119
Intangible liabilities, net	613
Other liabilities	541
Total liabilities held for sale, net	225,993
Held-for-sale | Other
LIABILITIES
Number of parcels of land | parcel		2
Held-for-sale | Philadelphia - Office
ASSETS
Operating properties	327,286
Accumulated depreciation	(59,519)
Operating real estate investments, net	267,767
Construction-in-progress	1,881
Land held for development	0
Total real estate investments, net	269,648
Deferred costs, net	10,888
Intangible assets, net	12,497
Other assets	101
Total assets held for sale, net	293,134
LIABILITIES
Mortgage notes payable, net	220,720
Deferred income, gains and rent	4,119
Intangible liabilities, net	613
Other liabilities	541
Total liabilities held for sale, net	225,993
Held-for-sale | Other - Land
ASSETS
Operating properties	0
Accumulated depreciation	0
Operating real estate investments, net	0
Construction-in-progress	0
Land held for development	7,349
Total real estate investments, net	7,349
Deferred costs, net	0
Intangible assets, net	0
Other assets	0
Total assets held for sale, net	7,349
LIABILITIES
Mortgage notes payable, net	0
Deferred income, gains and rent	0
Intangible liabilities, net	0
Other liabilities	0
Total liabilities held for sale, net	$ 0
Held-for-sale | Other - Land | Other
LIABILITIES
Number of parcels of land | parcel	2
Area of land (in acres) | a	35.2

Real Estate Investments - Textu

Real Estate Investments - Textual (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)aparcel	Jun. 30, 2020USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale, net	$ 7,349	$ 300,483
Held-for-sale | Other
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of parcels of land | parcel	2
Land Held For Development | Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Area of land (in acres) | a	35.2
Assets held for sale, net	$ 7,300

Investment in Unconsolidated _3

Investment in Unconsolidated Real Estate Ventures - Textual (Details) $ in Thousands, ft² in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020USD ($)aft²investmentapartmentproperty	Jun. 30, 2019USD ($)	Jun. 30, 2020USD ($)aft²investmentapartmentproperty	Jun. 30, 2019USD ($)	Dec. 31, 2019USD ($)
Schedule of Equity Method Investments [Line Items]
Number of properties | property	94		94
Investment in Real Estate Ventures	$ 118,558		$ 118,558		$ 120,294
Accounts receivable	$ 18,823		$ 18,823		16,363
Minimum
Schedule of Equity Method Investments [Line Items]
Ownership percentage	15.00%		15.00%
Maximum
Schedule of Equity Method Investments [Line Items]
Ownership percentage	70.00%		70.00%
Real Estate Venture
Schedule of Equity Method Investments [Line Items]
Accounts receivable	$ 800		$ 800		$ 800
Real Estate Venture | Management Fees
Schedule of Equity Method Investments [Line Items]
Service and other revenue	800	$ 1,100	2,000	$ 2,200
Real Estate Venture | Leasing Commission Income
Schedule of Equity Method Investments [Line Items]
Service and other revenue	200	$ 300	600	$ 500
Unconsolidated Real Estate Ventures
Schedule of Equity Method Investments [Line Items]
Investment in Real Estate Ventures	$ 113,100		$ 113,100
Unconsolidated Real Estate Ventures | Office properties
Schedule of Equity Method Investments [Line Items]
Number of unconsolidated investments in Real Estate Ventures | investment	3		3
Rentable area (in square feet) | ft²	5.4		5.4
Unconsolidated Real Estate Ventures | Unconsolidated Properties
Schedule of Equity Method Investments [Line Items]
Number of properties | property	7		7
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		2
Area of land (in acres) | a	1.4		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		1
Area of land (in acres) | a	1.3		1.3
Unconsolidated Real Estate Ventures | Residential Tower
Schedule of Equity Method Investments [Line Items]
Number of unconsolidated investments in Real Estate Ventures | investment	1		1
Number of apartment units (in units) | apartment	321		321

Investment in Unconsolidated _4

Investment in Unconsolidated Real Estate Ventures - Summary of Financial Position of Real Estate Ventures (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Net property	$ 3,101,931		$ 3,371,231
Other assets	117,959		115,678
Other liabilities	32,104		15,985
Debt, net	2,201,755
Equity	1,570,849	$ 1,603,814	1,688,303	$ 1,729,665	$ 1,760,463	$ 1,811,028
MAP Venture
Schedule of Equity Method Investments [Line Items]
Net property	186,865		192,582
Other assets	251,765		256,453
Other liabilities	266,383		266,200
Debt, net	182,279		181,525
Equity	(10,032)		1,310
Other
Schedule of Equity Method Investments [Line Items]
Net property	651,223		641,785
Other assets	85,123		85,549
Other liabilities	15,706		23,871
Debt, net	426,988		403,543
Equity	293,652		299,920
Total
Schedule of Equity Method Investments [Line Items]
Net property	838,088		834,367
Other assets	336,888		342,002
Other liabilities	282,089		290,071
Debt, net	609,267		585,068
Equity	$ 283,620		$ 301,230

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				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Schedule of Equity Method Investments [Line Items]
Revenue	$ 136,837		$ 144,151		$ 281,925	$ 288,047
Operating expenses	(110,568)		(117,288)		(228,077)	(235,976)
Interest expense	(20,191)		(20,516)		(40,200)	(40,873)
Depreciation and amortization	(49,743)		(51,667)		(101,781)	(103,111)
Net income	4,020	$ 8,087	6,252	$ 4,583	12,107	10,835
Equity in loss of Real Estate Ventures	(2,203)		(1,491)		(4,094)	(2,849)
Other
Schedule of Equity Method Investments [Line Items]
Revenue	15,013		15,567		28,851	32,338
Operating expenses	(5,990)		(5,757)		(11,724)	(12,320)
Interest expense	(3,324)		(3,788)		(6,266)	(5,172)
Depreciation and amortization	(6,870)		(6,922)		(13,335)	(14,285)
Net income	(1,171)		(900)		(2,474)	561
Company's share of net loss	(553)		(59)		(909)	5
Basis adjustments and other	(12)		2		(26)	12
Equity in loss of Real Estate Ventures	(565)		(57)		(935)	17
MAP Venture
Schedule of Equity Method Investments [Line Items]
Revenue	16,281		17,796		33,594	36,084
Operating expenses	(12,016)		(11,611)		(24,243)	(23,766)
Interest expense	(1,831)		(2,532)		(3,879)	(5,068)
Depreciation and amortization	(5,756)		(6,550)		(11,814)	(12,899)
Net income	$ (3,322)		$ (2,897)		$ (6,342)	$ (5,649)
Ownership interest %	50.00%		50.00%		50.00%	50.00%
Company's share of net loss	$ (1,661)		$ (1,449)		$ (3,171)	$ (2,825)
Basis adjustments and other	23		15		12	(41)
Equity in loss of Real Estate Ventures	(1,638)		(1,434)		(3,159)	(2,866)
Total
Schedule of Equity Method Investments [Line Items]
Revenue	31,294		33,363		62,445	68,422
Operating expenses	(18,006)		(17,368)		(35,967)	(36,086)
Interest expense	(5,155)		(6,320)		(10,145)	(10,240)
Depreciation and amortization	(12,626)		(13,472)		(25,149)	(27,184)
Net income	(4,493)		(3,797)		(8,816)	(5,088)
Company's share of net loss	(2,214)		(1,508)		(4,080)	(2,820)
Basis adjustments and other	11		17		(14)	(29)
Equity in loss of Real Estate Ventures	$ (2,203)		$ (1,491)		$ (4,094)	$ (2,849)

Leases (Details)

Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Fixed contractual payments	$ 101,994	$ 105,277	$ 206,395	$ 209,926
Variable lease payments	27,469	27,783	58,108	56,514
Total	$ 129,463	$ 133,060	$ 264,503	$ 266,440

Intangible Assets and Liabili_3

Intangible Assets and Liabilities - Intangible Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Intangible Assets [Line Items]
Intangible assets, total cost	$ 97,319	$ 177,581
Intangible assets, accumulated amortization	(42,057)	(92,730)
Intangible assets, net	55,262	84,851
Intangible liabilities, net	29,526	44,757
Acquired lease intangibles, accumulated amortization	(10,949)	(22,494)
Acquired lease intangibles, net	18,577	22,263
In-place lease value
Intangible Assets [Line Items]
Intangible assets, total cost	144,957	167,357
Intangible assets, accumulated amortization	(78,187)	(84,123)
Intangible assets, net	66,770	83,234
Tenant relationship value
Intangible Assets [Line Items]
Intangible assets, total cost	5,142	5,268
Intangible assets, accumulated amortization	(4,859)	(4,815)
Intangible assets, net	283	453
Above market leases acquired
Intangible Assets [Line Items]
Intangible assets, total cost	4,685	4,956
Intangible assets, accumulated amortization	(3,979)	(3,792)
Intangible assets, net	706	$ 1,164
Not Held for Sale
Intangible Assets [Line Items]
Intangible assets, total cost	154,784
Intangible assets, accumulated amortization	(87,025)
Intangible assets, net	67,759
Acquired lease intangibles, net	19,190
Held-for-sale
Intangible Assets [Line Items]
Intangible assets, total cost	57,465
Intangible assets, accumulated amortization	(44,968)
Intangible assets, net	12,497
Intangible liabilities, net	5,225
Acquired lease intangibles, accumulated amortization	(4,612)
Acquired lease intangibles, net	613
Below market leases acquired
Intangible Assets [Line Items]
Intangible liabilities, net	34,751
Acquired lease intangibles, accumulated amortization	(15,561)
Acquired lease intangibles, net	$ 19,190

Intangible Assets and Liabili_4

Intangible Assets and Liabilities - Annual Amortization of Intangible Assets, Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Assets
Intangible assets, net	$ 55,262	$ 84,851
Liabilities
Acquired lease intangibles, net	18,577	$ 22,263
Not Held for Sale
Assets
2020 (six months remaining)	8,768
2021	14,816
2022	9,652
2023	7,567
2024	5,214
Thereafter	21,742
Intangible assets, net	67,759
Liabilities
2020 (six months remaining)	2,057
2021	3,615
2022	2,079
2023	1,652
2024	1,425
Thereafter	8,362
Acquired lease intangibles, net	19,190
Held-for-sale
Assets
Intangible assets, net	12,497
Liabilities
Acquired lease intangibles, net	$ 613

Debt Obligations - Consolidated

Debt Obligations - Consolidated Debt Obligations Outstanding (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Consolidated debt obligations
Plus: premiums/(discounts), net	$ 9,918
Less: deferred financing costs	(9,301)
Outstanding indebtedness	2,201,755
Held for sale
Consolidated debt obligations
Plus: premiums/(discounts), net	(1,200)
Less: deferred financing costs	(200)
Outstanding indebtedness	220,720
Held for use
Consolidated debt obligations
Outstanding indebtedness	1,981,035	$ 2,144,418
Secured Debt
Consolidated debt obligations
Long-term debt, gross	311,528	315,437
Plus: premiums/(discounts), net	(1,195)	(1,383)
Less: deferred financing costs	(178)	(242)
Outstanding indebtedness	310,155	313,812
Secured Debt | Held for sale
Consolidated debt obligations
Outstanding indebtedness	220,720	0
Secured Debt | Held for use
Consolidated debt obligations
Outstanding indebtedness	89,435	313,812
Secured Debt | Two Logan Square
Consolidated debt obligations
Long-term debt, gross	$ 80,226	81,103
Effective interest rate	3.98%
Secured Debt | Four Tower Bridge
Consolidated debt obligations
Long-term debt, gross	$ 9,169	9,291
Effective interest rate	4.50%
Secured Debt | One Commerce Square
Consolidated debt obligations
Long-term debt, gross	$ 114,715	116,571
Effective interest rate	3.64%
Secured Debt | Two Commerce Square
Consolidated debt obligations
Long-term debt, gross	$ 107,418	108,472
Effective interest rate	4.51%
Unsecured Debt
Consolidated debt obligations
Long-term debt, gross	$ 1,889,610	1,828,610
Plus: premiums/(discounts), net	11,114	12,090
Less: deferred financing costs	(9,124)	(10,094)
Outstanding indebtedness	1,891,600	1,830,606
Unsecured Debt | $600 million Unsecured Credit Facility
Consolidated debt obligations
Long-term debt, gross	$ 61,000	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
Long-term debt, gross	$ 250,000	250,000
Effective interest rate	2.87%
Unsecured Debt | $350.0M 3.95% Guaranteed Notes due 2023
Consolidated debt obligations
Long-term debt, gross	$ 350,000	350,000
Effective interest rate	3.87%
Unsecured Debt | $350.0M 4.10% Guaranteed Notes due 2024
Consolidated debt obligations
Long-term debt, gross	$ 350,000	350,000
Effective interest rate	3.78%
Unsecured Debt | $450.0M 3.95% Guaranteed Notes due 2027
Consolidated debt obligations
Long-term debt, gross	$ 450,000	450,000
Effective interest rate	4.03%
Unsecured Debt | $350.0M 4.55% Guaranteed Notes due 2029
Consolidated debt obligations
Long-term debt, gross	$ 350,000	350,000
Effective interest rate	4.30%
Unsecured Debt | Indenture IA (Preferred Trust I)
Consolidated debt obligations
Long-term debt, gross	$ 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) - Swapped to fixed
Consolidated debt obligations
Long-term debt, gross	$ 25,774	25,774
Effective interest rate	3.30%
Unsecured Debt | Indenture II (Preferred Trust II)
Consolidated debt obligations
Long-term debt, gross	$ 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	6 Months Ended
	Jun. 30, 2020USD ($)
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 600,000,000
Weighted average interest rate	1.60%
Effective interest rate on credit facility	1.30%
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) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
2020 (six months remaining)	$ 83,317
2021	15,143
2022	317,332
2023	556,736
2024	350,000
Thereafter	878,610
Total principal payments	2,201,138
Net unamortized premiums/(discounts)	9,918
Net deferred financing costs	(9,301)
Outstanding indebtedness	2,201,755
Held for sale
Debt Instrument [Line Items]
2020 (six months remaining)	3,000
2021	6,100
2022	6,300
2023	206,700
Net unamortized premiums/(discounts)	(1,200)
Net deferred financing costs	(200)
Outstanding indebtedness	220,720
Held for use
Debt Instrument [Line Items]
Outstanding indebtedness	$ 1,981,035	$ 2,144,418

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	Jun. 30, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage notes payable	$ 89,435	$ 313,812
Deferred financing costs, net	9,301
Unsecured notes payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred financing costs, net	9,124	10,094
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable	44,430	44,430
Carrying Amount | Unsecured notes payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured notes payable	1,503,164	1,503,435
Deferred financing costs, net	7,900	8,700
Carrying Amount | Variable rate debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Variable rate debt	388,433	327,171
Deferred financing costs, net	1,200	1,400
Carrying Amount | Mortgage notes payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage notes payable	310,155	313,812
Deferred financing costs, net	200	200
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Note receivable, fair value	47,661	43,322
Fair Value | Unsecured notes payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value	1,548,735	1,591,830
Fair Value | Variable rate debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value	369,356	309,947
Fair Value | Mortgage notes payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value	$ 332,553	$ 317,031

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Textual (Details) - Brandywine 1919 Ventures $ in Millions	Jun. 26, 2018USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage loan	$ 44.4
Equity method investment, ownership percentage	50.00%
Other Assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Note receivable	$ 44.4

Derivative Financial Instrume_3

Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Derivative, notional amount	$ 275,774	$ 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	$ (8,589)	(562)
3.300% Interest Rate Swap Maturing January 30, 2021 | Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative liability, notional amount	$ 25,774	25,774
Derivative, fixed interest rate	3.30%
Derivative liability, fair value, gross liability	$ (313)	$ (94)

Limited Partners' Non-Control_2

Limited Partners' Non-Controlling Interests in the Parent Company (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Noncontrolling Interest [Abstract]
Aggregate amount related to non-controlling interests classified within equity	$ 9.1	$ 9.3
Settlement value of non controlling interest in operating partnership	$ 10.7	$ 15.5

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				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator
Net income	$ 4,020	$ 8,087	$ 6,252	$ 4,583	$ 12,107	$ 10,835
Net income attributable to noncontrolling interests, Basic	(24)		(47)		(89)	(107)
Nonforfeitable dividends allocated to unvested restricted shareholders, Basic	(93)		(93)		(224)	(212)
Net income attributable to noncontrolling interests, Diluted	(24)		(47)		(89)	(107)
Nonforfeitable dividends allocated to unvested restricted shareholders, Diluted	(93)		(93)		(224)	(212)
Net income attributable to Common Shareholders of Brandywine Realty Trust	3,903		6,112		11,794	10,516
Net income attributable to common shareholders, Diluted	$ 3,903		$ 6,112		$ 11,794	$ 10,516
Denominator
Basic weighted average shares outstanding (in shares)	170,518,095		176,143,206		173,294,031	176,001,071
Contingent securities/Share based compensation (in shares)	251,983		547,618		311,917	577,069
Diluted weighted average shares outstanding (in shares)	170,770,078		176,690,824		173,605,948	176,578,140
Earnings per Common Share:
Net income attributable to common shareholders, Basic (USD per share)	$ 0.02		$ 0.03		$ 0.07	$ 0.06
Net income attributable to common shareholders, Diluted (USD per share)	$ 0.02		$ 0.03		$ 0.07	$ 0.06

Beneficiaries Equity of the P_4

Beneficiaries Equity of the Parent Company - Textual (Details) - USD ($)	May 20, 2020	Jun. 30, 2020	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Jan. 03, 2019
Class of Stock [Line Items]
Dividends, common stock	$ 32,700,000
Shares repurchased and retired (in shares)					6,248,483	1,337,169
Share price (in dollars per share)					$ 9.60	$ 12.92
Value of stock repurchased and retired		$ 6,141,000	$ 53,858,000	$ 17,281,000	$ 60,000,000	$ 17,300,000
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	981,626

Partners Equity of the Operat_3

Partners Equity of the Operating Partnership - 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				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator
Net income	$ 4,020	$ 8,087	$ 6,252	$ 4,583	$ 12,107	$ 10,835
Nonforfeitable dividends allocated to unvested restricted shareholders, Basic	(93)		(93)		(224)	(212)
Nonforfeitable dividends allocated to unvested restricted shareholders, Diluted	$ (93)		$ (93)		$ (224)	$ (212)
Denominator
Basic weighted average shares outstanding (in shares)	170,518,095		176,143,206		173,294,031	176,001,071
Contingent securities/Share based compensation (in shares)	251,983		547,618		311,917	577,069
Diluted weighted average shares outstanding (in shares)	170,770,078		176,690,824		173,605,948	176,578,140
Earnings per Common Partnership Unit:
Net income attributable to common shareholders, Basic (USD per share)	$ 0.02		$ 0.03		$ 0.07	$ 0.06
Net income attributable to common shareholders, Diluted (USD per share)	$ 0.02		$ 0.03		$ 0.07	$ 0.06
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Numerator
Net income	$ 4,020	$ 8,087	$ 6,252	$ 4,583	$ 12,107	$ 10,835
Net income attributable to noncontrolling interests	(10)		(13)		(22)	(47)
Nonforfeitable dividends allocated to unvested restricted shareholders, Basic	(93)		(93)		(224)	(212)
Nonforfeitable dividends allocated to unvested restricted shareholders, Diluted	(93)		(93)		(224)	(212)
Net income attributable to common unitholders, Basic	3,917		6,146		11,861	10,576
Net income attributable to common unitholders, Diluted	$ 3,917		$ 6,146		$ 11,861	$ 10,576
Denominator
Basic weighted average shares outstanding (in shares)	171,499,729		177,125,064		174,275,665	176,983,433
Contingent securities/Share based compensation (in shares)	251,983		547,619		311,917	577,069
Diluted weighted average shares outstanding (in shares)	171,751,712		177,672,683		174,587,582	177,560,502
Earnings per Common Partnership Unit:
Net income attributable to common shareholders, Basic (USD per share)	$ 0.02		$ 0.03		$ 0.07	$ 0.06
Net income attributable to common shareholders, Diluted (USD per share)	$ 0.02		$ 0.03		$ 0.07	$ 0.06

Partners Equity of the Operat_4

Partners Equity of the Operating Partnership - Textual (Details) $ / shares in Units, $ in Thousands	May 20, 2020USD ($)$ / shares	Jun. 30, 2020USD ($)	Mar. 31, 2020USD ($)	Mar. 31, 2019USD ($)	Jun. 30, 2020USD ($)$ / sharesshares	Jun. 30, 2019USD ($)$ / sharesshares
Earnings Per Common Partnership Unit [Line Items]
Dividends, common stock | $	$ 32,700
Shares repurchased and retired (in shares) | shares					6,248,483	1,337,169
Share price (in dollars per share) | $ / shares					$ 9.60	$ 12.92
Value of stock repurchased and retired | $		$ 6,141	$ 53,858	$ 17,281	$ 60,000	$ 17,300
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 | $	$ 32,700
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

Segment Information (Textual) (

Segment Information (Textual) (Details)	6 Months Ended
	Jun. 30, 2020segment
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	Jun. 30, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Operating properties	$ 3,650,521	$ 4,006,459
Assets held for sale - real estate investments	327,286	0
Operating Properties	3,977,807	4,006,459
Right of use asset - operating leases, net	21,315	21,656
Construction-in-progress	235,475	180,718
Land held for development	112,420	96,124
Prepaid leasehold interests in land held for development, net	39,389	39,592
Philadelphia CBD
Segment Reporting Information [Line Items]
Operating properties	1,384,550	1,726,299
Pennsylvania Suburbs
Segment Reporting Information [Line Items]
Operating properties	987,069	1,003,890
Austin, Texas
Segment Reporting Information [Line Items]
Operating properties	722,710	721,255
Metropolitan Washington, D.C.
Segment Reporting Information [Line Items]
Operating properties	469,091	468,035
Other
Segment Reporting Information [Line Items]
Operating properties	87,101	$ 86,980
Held-for-sale
Segment Reporting Information [Line Items]
Assets held for sale - real estate investments	327,286
Construction-in-progress	1,881
Land held for development	7,349
Philadelphia - Office | Held-for-sale
Segment Reporting Information [Line Items]
Assets held for sale - real estate investments	327,286
Construction-in-progress	1,881
Land held for development	$ 0

Segment Information - Real Es_2

Segment Information - Real Estate Investments, at Cost of Company's Reportable Segments (Additional Information) (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2020aproperty	Dec. 31, 2019a
3001-3003 and 3025 JFK Boulevard
Segment Reporting Information [Line Items]
Lease agreement term	99 years	99 years
Held-for-sale | Land Held For Development
Segment Reporting Information [Line Items]
Area of land (in acres)	35.2
Other | Held-for-sale | Land Held For Development
Segment Reporting Information [Line Items]
Area of land (in acres)		35.2
Philadelphia CBD
Segment Reporting Information [Line Items]
Number of properties held for sale | property	2

Segment Information - Net Opera

Segment Information - Net Operating Income of Company's Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Total revenue	$ 136,837	$ 144,151	$ 281,925	$ 288,047
Operating expenses	(52,482)	(57,222)	(109,392)	(114,622)
Net operating income (loss)	84,355	86,929	172,533	173,425
Operating Segments | Philadelphia CBD
Segment Reporting Information [Line Items]
Total revenue	62,648	64,956	128,563	130,754
Operating expenses	(22,895)	(25,353)	(47,093)	(50,538)
Net operating income (loss)	39,753	39,603	81,470	80,216
Operating Segments | Pennsylvania Suburbs
Segment Reporting Information [Line Items]
Total revenue	34,683	34,299	71,920	69,926
Operating expenses	(11,161)	(11,808)	(23,839)	(24,799)
Net operating income (loss)	23,522	22,491	48,081	45,127
Operating Segments | Austin, Texas
Segment Reporting Information [Line Items]
Total revenue	25,012	26,188	51,593	50,954
Operating expenses	(9,943)	(9,804)	(20,088)	(18,880)
Net operating income (loss)	15,069	16,384	31,505	32,074
Operating Segments | Metropolitan Washington, D.C.
Segment Reporting Information [Line Items]
Total revenue	10,091	13,673	20,845	27,193
Operating expenses	(4,930)	(6,339)	(10,442)	(12,543)
Net operating income (loss)	5,161	7,334	10,403	14,650
Operating Segments | Other
Segment Reporting Information [Line Items]
Total revenue	3,381	3,464	7,033	6,646
Operating expenses	(2,367)	(2,390)	(5,060)	(4,535)
Net operating income (loss)	1,014	1,074	1,973	2,111
Corporate
Segment Reporting Information [Line Items]
Total revenue	1,022	1,571	1,971	2,574
Operating expenses	(1,186)	(1,528)	(2,870)	(3,327)
Net operating income (loss)	$ (164)	$ 43	$ (899)	$ (753)

Segment Information - Unconsoli

Segment Information - Unconsolidated Real Estate Ventures of Company's Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Investment in real estate ventures	$ 113,055		$ 113,055		$ 120,294
Equity in loss of real estate ventures	(2,203)	$ (1,491)	(4,094)	$ (2,849)
Philadelphia CBD
Segment Reporting Information [Line Items]
Investment in real estate ventures	16,611		16,611		17,524
Equity in loss of real estate ventures	83	84	161	162
Metropolitan Washington, D.C.
Segment Reporting Information [Line Items]
Investment in real estate ventures	101,947		101,947		102,840
Equity in loss of real estate ventures	(647)	(260)	(1,096)	(435)
MAP Venture
Segment Reporting Information [Line Items]
Investment in real estate ventures	(5,503)		(5,503)		(70)
Equity in loss of real estate ventures	(1,639)	(1,445)	(3,159)	(2,812)
Other
Segment Reporting Information [Line Items]
Investment in real estate ventures	0		0		$ 0
Equity in loss of real estate ventures	$ 0	$ 130	$ 0	$ 236

Segment Information - Reconcili

Segment Information - Reconciliation of Consolidated Net Income to Consolidated NOI (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting [Abstract]
Net income	$ 4,020	$ 8,087	$ 6,252	$ 4,583	$ 12,107	$ 10,835
Plus:
Interest expense	20,191		20,516		40,200	40,873
Interest expense - amortization of deferred financing costs	731		666		1,480	1,332
Depreciation and amortization	49,743		51,667		101,781	103,111
General and administrative expenses	8,343		8,399		16,904	18,243
Equity in loss of Real Estate Ventures	2,203		1,491		4,094	2,849
Less:
Interest income	445		553		1,020	1,078
Income tax (provision) benefit	230		(17)		226	(46)
Net gain on disposition of real estate	0		0		2,586	0
Net gain on sale of undepreciated real estate	201		250		201	1,251
Net gain on real estate venture transactions	0		1,276		0	1,535
Consolidated net operating income	$ 84,355		$ 86,929		$ 172,533	$ 173,425

Commitments and Contingencies (

Commitments and Contingencies (Details) ft² in Thousands	6 Months Ended
	Jun. 30, 2020USD ($)ft²
Property Subject to or Available for Operating Lease [Line Items]
Debt, net	$ 2,201,755,000
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	$ 618,900,000
Radnor PA Property
Property Subject to or Available for Operating Lease [Line Items]
Rentable area (in square feet) | ft²	170
Payments to acquire buildings	$ 20,300,000
Payments for deposits on real estate acquisitions	1,000,000
Drexel Square
Property Subject to or Available for Operating Lease [Line Items]
Required spending in capital improvements to property	8,300,000
Estimated potential additional contribution obligation	2,700,000
Mortgage Lenders
Property Subject to or Available for Operating Lease [Line Items]
Associated letter of credit	$ 0

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ in Thousands	Jul. 21, 2020	Jun. 30, 2020	Dec. 31, 2019
Subsequent Event [Line Items]
Debt, net		$ 2,201,755
Secured Debt
Subsequent Event [Line Items]
Debt, net		$ 310,155	$ 313,812
Subsequent Event | Philadelphia - Office
Subsequent Event [Line Items]
Sale of ownership interest percentage	30.00%
Sale price of property sold	$ 115,000
Net proceeds	100,800
Fair vaue adjustment upon deconsolidation	270,000
Subsequent Event | Philadelphia - Office | Secured Debt
Subsequent Event [Line Items]
Debt, net	222,100
Preferred Equity Interest In One Commerce Square and Two Commerce Square | Subsequent Event | Philadelphia - Office
Subsequent Event [Line Items]
Equity commitment	20,000
Preferred Equity Interest In One Commerce Square and Two Commerce Square | Investor In One Commerce Square And Two Commerce Square | Subsequent Event | Philadelphia - Office
Subsequent Event [Line Items]
Equity commitment	$ 20,000