Brandywine Operating Partnership 10-Q 25 Apr 16 2016 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Document - shares	3 Months Ended
	Mar. 31, 2016	Apr. 22, 2016
Document Information [Line Items]
Entity Registrant Name	BRANDYWINE REALTY TRUST
Entity Central Index Key	790,816
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		175,015,396
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Document Information [Line Items]
Entity Registrant Name	BRANDYWINE OPERATING PARTNERSHIP, L.P.
Entity Central Index Key	1,060,386
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q1
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Real estate investments:
Operating properties	$ 3,703,193	$ 3,693,000
Accumulated depreciation	(891,263)	(867,035)
Operating real estate investments, net	2,811,930	2,825,965
Construction-in-progress	319,656	268,983
Land held for development	132,747	130,479
Total real estate investments, net	3,264,333	3,225,427
Cash and cash equivalents	423,517	56,694
Accounts receivable, net of allowance of $1,950 and $1,736 in 2016 and 2015, respectively	14,027	17,126
Accrued rent receivable, net of allowance of $13,313 and $14,442 in 2016 and 2015, respectively	133,720	145,092
Assets held for sale, net	0	584,365
Investment in Real Estate Ventures, equity method	278,659	241,004
Deferred costs, net	90,973	101,419
Intangible assets, net	100,063	111,623
Other assets	72,772	71,761
Total assets	4,378,064	4,554,511
LIABILITIES AND EQUITY
Mortgage notes payable, net	345,310	545,753
Unsecured term loans, net	247,882	247,800
Unsecured senior notes, net	1,591,756	1,591,164
Accounts payable and accrued expenses	112,203	99,856
Distributions payable	28,295	28,249
Deferred income, gains and rent	27,331	30,413
Acquired lease intangibles, net	23,248	25,655
Liabilities related to assets held for sale	0	2,151
Other liabilities	37,749	31,379
Total liabilities	$ 2,413,774	$ 2,602,420
Commitments and contingencies
Equity:
6.90% Series E Preferred Shares, $0.01 par value; issued and outstanding- 4,000,000 in 2016 and 2015	$ 40	$ 40
Common Shares of Brandywine Realty Trust's beneficial interest, $0.01 par value; shares authorized 400,000,000; 174,890,432 and 174,688,568 issued and outstanding in 2016 and 2015, respectively	1,749	1,747
Additional paid-in-capital	3,255,908	3,252,622
Deferred compensation payable in common shares	13,155	11,918
Common shares in grantor trust, 847,007 in 2016, 745,686 in 2015	(13,155)	(11,918)
Cumulative earnings	545,041	499,086
Accumulated other comprehensive loss	(14,271)	(5,192)
Cumulative distributions	(1,842,450)	(1,814,378)
Total Brandywine Realty Trust's equity	1,946,017	1,933,925
Non-controlling interests	18,273	18,166
Total beneficiaries' equity	1,964,290	1,952,091
Total liabilities and beneficiaries' equity	4,378,064	4,554,511
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Real estate investments:
Operating properties	3,703,193	3,693,000
Accumulated depreciation	(891,263)	(867,035)
Operating real estate investments, net	2,811,930	2,825,965
Construction-in-progress	319,656	268,983
Land held for development	132,747	130,479
Total real estate investments, net	3,264,333	3,225,427
Cash and cash equivalents	423,517	56,694
Accounts receivable, net of allowance of $1,950 and $1,736 in 2016 and 2015, respectively	14,027	17,126
Accrued rent receivable, net of allowance of $13,313 and $14,442 in 2016 and 2015, respectively	133,720	145,092
Assets held for sale, net	0	584,365
Investment in Real Estate Ventures, equity method	278,659	241,004
Deferred costs, net	90,973	101,419
Intangible assets, net	100,063	111,623
Other assets	72,772	71,761
Total assets	4,378,064	4,554,511
LIABILITIES AND EQUITY
Mortgage notes payable, net	345,310	545,753
Unsecured term loans, net	247,882	247,800
Unsecured senior notes, net	1,591,756	1,591,164
Accounts payable and accrued expenses	112,203	99,856
Distributions payable	28,295	28,249
Deferred income, gains and rent	27,331	30,413
Acquired lease intangibles, net	23,248	25,655
Liabilities related to assets held for sale	0	2,151
Other liabilities	37,749	31,379
Total liabilities	$ 2,413,774	$ 2,602,420
Commitments and contingencies
Redeemable limited partnership units at redemption value; 1,535,102 issued and outstanding in 2016 and 2015	$ 22,285	$ 22,114
Equity:
6.90% Series E Preferred Shares, $0.01 par value; issued and outstanding- 4,000,000 in 2016 and 2015	96,850	96,850
General Partnership Capital 0 and 174,688,568 units issued and outstanding in 2016 and 2015, respectively	1,857,859	1,836,692
Accumulated other comprehensive loss	(14,755)	(5,597)
Total Brandywine Operating Partnership, L.P.'s equity	1,939,954	1,927,945
Non-controlling interest - consolidated real estate ventures	2,051	2,032
Total partners' equity	1,942,005	1,929,977
Total liabilities and beneficiaries' equity	$ 4,378,064	$ 4,554,511

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Accounts receivable, allowance	$ 1,950	$ 1,736
Accrued rent receivable, allowance	$ 13,313	$ 14,442
Preferred Stock, Shares Authorized	20,000,000	20,000,000
Preferred Stock, Dividend Rate, Percentage	6.90%	6.90%
Preferred Stock, Par or Stated Value Per Share (USD per share)	$ 0.01	$ 0.01
Preferred Stock, Shares Issued	4,000,000	4,000,000
Preferred Stock, Shares Outstanding	4,000,000	4,000,000
Common Stock, Par or Stated Value Per Share (USD per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorized	400,000,000	400,000,000
Common Stock, Shares, Issued	174,890,432	174,688,568
Common Stock, Shares, Outstanding	174,890,432	174,688,568
Common Shares in Grantor Trust	847,007	745,686
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Accounts receivable, allowance	$ 1,950	$ 1,736
Accrued rent receivable, allowance	$ 13,313	$ 14,442
Preferred Stock, Dividend Rate, Percentage	6.90%	6.90%
Preferred Stock, Shares Issued	4,000,000	4,000,000
Preferred Stock, Shares Outstanding	4,000,000	4,000,000
Redeemable Limited Partnership Units Issued	1,535,102	1,535,102
Redeemable Limited Partnership Units Outstanding	1,535,102	1,535,102
General Partners' Capital Account, Units Issued	174,890,432	174,688,568
General Partners' Capital Account, Units Outstanding	174,890,432	174,688,568

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenue
Rents	$ 110,163	$ 120,410
Tenant reimbursements	20,054	22,654
Termination fees	294	636
Third party management fees, labor reimbursement and leasing	5,235	3,872
Other	756	2,834
Total revenue	136,502	150,406
Operating expenses:
Property operating expenses	40,879	46,577
Real estate taxes	11,886	12,545
Third party management expenses	2,010	1,576
Depreciation and amortization	48,873	51,111
General and administrative expenses	9,120	8,636
Provision for impairment	7,390	1,726
Total operating expenses	120,158	122,171
Operating income	16,344	28,235
Other income (expense):
Interest income	320	750
Interest expense	(23,691)	(28,176)
Interest expense - amortization of deferred financing costs	(774)	(1,079)
Interest expense - financing obligation	(281)	(286)
Equity in income (loss) of Real Estate Ventures	(403)	131
Net gain on disposition of real estate	115,456	9,019
Net gain on real estate venture transactions	5,929	0
Loss on early extinguishment of debt	(66,590)	0
Net income	46,310	8,594
Net income from continuing operations attributable to non-controlling interests	(389)	(58)
Net income attributable to non-controlling interests	(389)	(58)
Net income attributable to entity	45,921	8,536
Distribution to preferred shareholders	(1,725)	(1,725)
Nonforfeitable dividends allocated to unvested restricted shareholders	(105)	(101)
Net income attributable to Common Share/Unit holders of entity	$ 44,091	$ 6,710
Basic income per Common Share:
Continuing operations (USD per share)	$ 0.25	$ 0.04
Diluted income per Common Share:
Continuing operations (USD per share)	$ 0.25	$ 0.04
Basic weighted average shares outstanding (in shares)	174,788,945	179,562,930
Diluted weighted average shares outstanding (in shares)	175,471,413	180,655,272
Distributions declared per Common Share (USD per share)	$ 0.15	$ 0.15
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Rents	$ 110,163	$ 120,410
Tenant reimbursements	20,054	22,654
Termination fees	294	636
Third party management fees, labor reimbursement and leasing	5,235	3,872
Other	756	2,834
Total revenue	136,502	150,406
Operating expenses:
Property operating expenses	40,879	46,577
Real estate taxes	11,886	12,545
Third party management expenses	2,010	1,576
Depreciation and amortization	48,873	51,111
General and administrative expenses	9,120	8,636
Provision for impairment	7,390	1,726
Total operating expenses	120,158	122,171
Operating income	16,344	28,235
Other income (expense):
Interest income	320	750
Interest expense	(23,691)	(28,176)
Interest expense - amortization of deferred financing costs	(774)	(1,079)
Interest expense - financing obligation	(281)	(286)
Equity in income (loss) of Real Estate Ventures	(403)	131
Net gain on disposition of real estate	115,456	9,019
Net gain on real estate venture transactions	5,929	0
Loss on early extinguishment of debt	(66,590)	0
Net income	46,310	8,594
Net income from continuing operations attributable to non-controlling interests	(2)	0
Net income attributable to entity	46,308	8,594
Distribution to preferred shareholders	(1,725)	(1,725)
Nonforfeitable dividends allocated to unvested restricted shareholders	(105)	(101)
Net income attributable to Common Share/Unit holders of entity	$ 44,478	$ 6,768
Basic income per Common Share:
Continuing operations (USD per share)	$ 0.25	$ 0.04
Diluted income per Common Share:
Continuing operations (USD per share)	$ 0.25	$ 0.04
Basic weighted average shares outstanding (in shares)	176,324,047	181,098,032
Diluted weighted average shares outstanding (in shares)	177,006,515	182,190,374
Distributions declared per Common Share (USD per share)	$ 0.15	$ 0.15

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Net income		$ 46,310	$ 8,594
Comprehensive loss:
Unrealized loss on derivative financial instruments		(9,405)	(2,663)
Reclassification of realized losses on derivative financial instruments to operations, net	[1]	246	58
Total comprehensive loss		(9,159)	(2,605)
Comprehensive income		37,151	5,989
Comprehensive loss attributable to non-controlling interest		(309)	(36)
Comprehensive income attributable to reporting entity		36,842	5,953
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Net income		46,310	8,594
Comprehensive loss:
Unrealized loss on derivative financial instruments		(9,405)	(2,663)
Reclassification of realized losses on derivative financial instruments to operations, net	[1]	246	58
Total comprehensive loss		(9,159)	(2,605)
Comprehensive loss attributable to non-controlling interest		(2)	0
Comprehensive income attributable to reporting entity		$ 37,149	$ 5,989
[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	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Deferred Compensation, Share-based Payments [Member]	Common Stock In Grantor Trust [Member]	Cumulative Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Cumulative Distributions [Member]	Noncontrolling Interest [Member]
Beginning Balance, Shares at Dec. 31, 2014		4,000,000	179,293,160		384,536
Beginning Balance at Dec. 31, 2014	$ 2,159,326	$ 40	$ 1,793	$ 3,314,693	$ 6,219	$ (6,219)	$ 529,487	$ (4,607)	$ (1,700,579)	$ 18,499
Net income	8,594						8,536			58
Other comprehensive loss	(2,605)							(2,583)		(22)
Bonus share issuance, Shares			8,447
Bonus share issuance	125			125
Equity issuance costs	(48)			(48)
Share-based compensation activity, Shares			410,506		280,011
Share-based compensation activity	2,352		$ 5	2,347
Share Issuance from/to Deferred Compensation Plan, Shares			33,485		30,144
Share Issuance from/to Deferred Compensation Plan	0				$ 4,975	(4,975)
Adjustment to Non-controlling Interest	0			20						(20)
Distribution to preferred shareholders	(1,725)								(1,725)
Distributions declared	(27,443)								(27,213)	(230)
Ending Balance, Shares at Mar. 31, 2015		4,000,000	179,745,598		694,691
Ending Balance at Mar. 31, 2015	2,138,576	$ 40	$ 1,798	3,317,137	$ 11,194	(11,194)	538,023	(7,190)	(1,729,517)	18,285
Beginning Balance, Shares at Dec. 31, 2015		4,000,000	174,688,568		745,686
Beginning Balance at Dec. 31, 2015	1,952,091	$ 40	$ 1,747	3,252,622	$ 11,918	(11,918)	499,086	(5,192)	(1,814,378)	18,166
Net income	46,310						45,921			389
Other comprehensive loss	(9,159)							(9,079)		(80)
Issuance of partnership interest in consolidated real estate venture	18									18
Share-based compensation activity, Shares			210,116
Share-based compensation activity	3,332		$ 2	3,296			34
Share Issuance from/to Deferred Compensation Plan, Shares			(8,252)		101,321
Share Issuance from/to Deferred Compensation Plan	0				$ 1,237	(1,237)
Adjustment to Non-controlling Interest	0			(10)						10
Distribution to preferred shareholders	(1,725)								(1,725)
Distributions declared	(26,577)								(26,347)	(230)
Ending Balance, Shares at Mar. 31, 2016		4,000,000	174,890,432		847,007
Ending Balance at Mar. 31, 2016	$ 1,964,290	$ 40	$ 1,749	$ 3,255,908	$ 13,155	$ (13,155)	$ 545,041	$ (14,271)	$ (1,842,450)	$ 18,273

Consolidated Statements of Ben7

Consolidated Statements of Beneficiaries' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Dividends declared (USD per share)	$ 0.15	$ 0.15
Cumulative Distributions [Member]
Dividends declared (USD per share)	0.15	0.15
Noncontrolling Interest [Member]
Dividends declared (USD per share)	$ 0.15	$ 0.15

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net income	$ 46,310	$ 8,594
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	48,873	51,111
Amortization of deferred financing costs	774	1,079
Amortization of debt discount/(premium), net	382	(158)
Amortization of stock compensation costs	2,296	2,756
Shares used for employee taxes upon vesting of share awards	(289)	(1,359)
Straight-line rent income	(6,104)	(6,339)
Amortization of acquired above (below) market leases, net	(2,232)	(1,290)
Straight-line ground rent expense	22	22
Provision for doubtful accounts	215	380
Net gain on real estate venture transactions	(5,929)	0
Net gain on sale of interests in real estate	(115,456)	(9,019)
Loss on early extinguishment of debt - deferred financing costs	13,157	0
Provision for impairment	7,390	1,726
Real Estate Venture loss in excess of distributions	723	163
Deferred financing obligation	(253)	(287)
Changes in assets and liabilities
Accounts receivable	246	(170)
Other assets	(9,193)	(9,322)
Accounts payable and accrued expenses	6,296	11,131
Deferred income, gains and rent	(2,308)	(3,267)
Other liabilities	552	(140)
Net cash (used in) provided by operating activities	(14,528)	45,611
Cash flows from investing activities:
Proceeds from the sale of properties	704,911	26,778
Distribution of sale proceeds from a real estate venture	4,812	0
Proceeds from repayment of mortgage notes receivable	0	88,000
Capital expenditures for tenant improvements	(13,949)	(14,515)
Capital expenditures for redevelopments	(6,199)	(5,984)
Capital expenditures for developments	(54,405)	(37,867)
Advances for the purchase of tenant assets, net of repayments	360	(138)
Investment in unconsolidated Real Estate Ventures	(14,414)	(11,028)
Deposits for real estate	(2,275)	(5,995)
Escrowed cash	6,991	2,868
Cash distribution from unconsolidated Real Estate Ventures in excess of cumulative equity income	1,436	2,563
Leasing costs paid	(4,716)	(6,371)
Net cash provided from investing activities	622,552	38,311
Cash flows from financing activities:
Repayments of mortgage notes payable	(213,739)	(3,546)
Proceeds from credit facility borrowings	195,000	0
Repayments of credit facility borrowings	(195,000)	0
Debt financing costs paid	(72)	0
Proceeds from the exercise of stock options	826	127
Partner contribution to consolidated real estate venture	18	0
Distributions paid to shareholders	(28,004)	(28,692)
Distributions to non-controlling interest	(230)	(230)
Net cash used in financing activities	(241,201)	(32,341)
Increase in cash and cash equivalents	366,823	51,581
Cash and cash equivalents at beginning of year	56,694	257,502
Cash and cash equivalents at end of year	423,517	309,083
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the three months ended March 31, 2016 and 2015 of $3,671 and $2,703, respectively	13,656	18,080
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid	28,278	29,009
Change in investment in real estate ventures as a result of a disposition	(1,130)	0
Change in investment in real estate ventures related to non-cash disposition of property	25,165	0
Change in capital expenditures financed through accounts payable at period end	4,235	(440)
Change in capital expenditures financed through retention payable at period end	753	2,200
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Cash flows from operating activities:
Net income	46,310	8,594
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	48,873	51,111
Amortization of deferred financing costs	774	1,079
Amortization of debt discount/(premium), net	382	(158)
Amortization of stock compensation costs	2,296	2,756
Shares used for employee taxes upon vesting of share awards	(289)	(1,359)
Straight-line rent income	(6,104)	(6,339)
Amortization of acquired above (below) market leases, net	(2,232)	(1,290)
Straight-line ground rent expense	22	22
Provision for doubtful accounts	215	380
Net gain on real estate venture transactions	(5,929)	0
Net gain on sale of interests in real estate	(115,456)	(9,019)
Loss on early extinguishment of debt - deferred financing costs	13,157	0
Provision for impairment	7,390	1,726
Real Estate Venture loss in excess of distributions	723	163
Deferred financing obligation	(253)	(287)
Changes in assets and liabilities
Accounts receivable	246	(170)
Other assets	(9,193)	(9,322)
Accounts payable and accrued expenses	6,296	11,131
Deferred income, gains and rent	(2,308)	(3,267)
Other liabilities	552	(140)
Net cash (used in) provided by operating activities	(14,528)	45,611
Cash flows from investing activities:
Proceeds from the sale of properties	704,911	26,778
Distribution of sale proceeds from a real estate venture	4,812	0
Proceeds from repayment of mortgage notes receivable	0	88,000
Capital expenditures for tenant improvements	(13,949)	(14,515)
Capital expenditures for redevelopments	(6,199)	(5,984)
Capital expenditures for developments	(54,405)	(37,867)
Advances for the purchase of tenant assets, net of repayments	360	(138)
Investment in unconsolidated Real Estate Ventures	(14,414)	(11,028)
Deposits for real estate	(2,275)	(5,995)
Escrowed cash	6,991	2,868
Cash distribution from unconsolidated Real Estate Ventures in excess of cumulative equity income	1,436	2,563
Leasing costs paid	(4,716)	(6,371)
Net cash provided from investing activities	622,552	38,311
Cash flows from financing activities:
Repayments of mortgage notes payable	(213,739)	(3,546)
Proceeds from credit facility borrowings	195,000	0
Repayments of credit facility borrowings	(195,000)	0
Debt financing costs paid	(72)	0
Proceeds from the exercise of stock options	826	127
Partner contribution to consolidated real estate venture	18	0
Distributions paid to shareholders	(28,234)	(28,922)
Net cash used in financing activities	(241,201)	(32,341)
Increase in cash and cash equivalents	366,823	51,581
Cash and cash equivalents at beginning of year	56,694	257,502
Cash and cash equivalents at end of year	423,517	309,083
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the three months ended March 31, 2016 and 2015 of $3,671 and $2,703, respectively	13,656	18,080
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid	28,278	29,009
Change in investment in real estate ventures as a result of a disposition	(1,130)	0
Change in investment in real estate ventures related to non-cash disposition of property	25,165	0
Change in capital expenditures financed through accounts payable at period end	4,235	(440)
Change in capital expenditures financed through retention payable at period end	$ 753	$ 2,200

Consolidated Statements of Cas9

Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Supplemental Cash Flow Information [Abstract]
Capitalized interest	$ 3,671	$ 2,703
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Supplemental Cash Flow Information [Abstract]
Capitalized interest	$ 3,671	$ 2,703

Organization of the Parent Comp

Organization of the Parent Company and The Operating Partnership	3 Months Ended
	Mar. 31, 2016
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 The Parent Company is a self-administered and self-managed real estate investment trust (“REIT”) that provides leasing, property management, development, redevelopment, acquisition and other tenant-related services for a portfolio of office, retail and mixed-use properties. The Parent Company owns its assets and conducts its operations through the Operating Partnership and subsidiaries of the Operating Partnership. The Parent Company is the sole general partner of the Operating Partnership and, as of March 31, 2016, owned a 99.1% 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”. As of March 31, 2016, the Company owned 121 properties that contain an aggregate of approximately 18.2 million net rentable square feet and consist of 106 office properties, nine mixed-use properties, one retail property (116 properties, collectively the “Core Properties”), three development properties, one redevelopment property and one re-entitlement property (collectively, the “Properties”). In addition, as of March 31, 2016, the Company owned economic interests in 16 unconsolidated real estate ventures (collectively, the “Real Estate Ventures”), of which nine own properties that contain approximately 8.1 million net rentable square feet of office space; two own 4.3 acres of undeveloped parcels of land; three own 2.2 acres of land under active development; one owns a residential tower that contains 345 apartment units and one owns an apartment complex that contains 398 units. As of March 31, 2016, the Company also owned 292 acres of undeveloped land and held options to purchase parcels containing approximately 50 additional acres of undeveloped land. As of March 31, 2016, the total potential development that these land parcels could support, including the parcels under option, under current zoning, entitlements or combination thereof, amounted to an estimated 6.4 million square feet. The Properties and the properties owned by the Real Estate Ventures are located in or near Philadelphia, Pennsylvania; Metropolitan Washington, D.C.; Southern New Jersey; Richmond, Virginia; Wilmington, Delaware; Austin, Texas and Oakland and Concord, California. In addition to managing properties that the Company owns, as of March 31, 2016, the Company was managing approximately 11.1 million net rentable square feet of office and industrial properties for third parties and Real Estate Ventures. Prior to the MAP Venture formation on February 4, 2016 (See Note 4, “ Investment in Unconsolidated Real Estate Ventures The Company conducts its third-party real estate management services business primarily through wholly-owned management company subsidiaries. As of March 31, 2016, the management company subsidiaries were managing properties containing an aggregate of approximately 29.3 million net rentable square feet, of which approximately 18.2 million net rentable square feet related to Properties owned by the Company and approximately 11.1 million net rentable square feet related to properties owned by third parties and Real Estate Ventures. Unless otherwise indicated, all references in this Form 10-Q to square feet represent net rentable area.

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2016
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 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 (consisting solely of normal recurring matters) for a fair statement of the financial position of the Company as of March 31, 2016, the results of its operations for the three-month periods ended March 31, 2016 and 2015 and its cash flows for the three-month periods ended March 31, 2016 and 2015 have been included. 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 2015 Annual Report on Form 10-K filed with the SEC on February 29, 2016. On January 1, 2016, the Company adopted accounting guidance under Accounting Standards Codification (ASC) Topic 810, "Consolidation,” modifying the analysis it must perform to determine whether it should consolidate certain types of legal entities. The guidance does not amend the existing disclosure requirements for variable interest entities (“VIEs”) or voting interest model entities. The guidance, however, modified the requirements to qualify under the voting interest model. Under the revised guidance, the Operating Partnership will be a variable interest entity of the Parent Company. As the Operating Partnership is already consolidated in the balance sheets of the Parent Company, the identification of this entity as a variable interest entity has no impact on the consolidated financial statements of the Parent Company. There were no other legal entities qualifying under the scope of the revised guidance that were consolidated as a result of the adoption of this guidance. In addition, there were no other voting interest entities under prior existing guidance determined to be variable interest entities under the revised guidance. The Company's Annual Report on Form 10-K for the year ended December 31, 2015 contains a discussion of our significant accounting policies under Note 2, "Summary of Significant Accounting Policies". Recent Accounting Pronouncements In March 2016, the Financial Accounting Standards Board (FASB) issued guidance intended to simplify various aspects related to how share-based payments are accounted for and presented in the financial statements. The new guidance allows for entities to make an entity-wide accounting policy election to either estimate the number of awards that are expected to vest or account for forfeitures when they occur. In addition, the guidance allows employers to withhold shares to satisfy minimum statutory tax withholding requirements up to the employees’ maximum individual tax rate without causing the award to be classified as a liability. The guidance also stipulates that cash paid by an employer to a taxing authority when directly withholding shares for tax-withholding purposes should be classified as a financing activity on the statement of cash flows. This guidance is effective for annual reporting periods beginning after December 15, 2016, and interim periods within that reporting period. Early adoption is permitted in any interim or annual period, with any adjustments reflected as of the beginning of the fiscal year of adoption. The Company is in the process of evaluating the impact of this new guidance. Also in March 2016, the FASB issued guidance clarifying that a novation of party to a derivative instrument, whereby one of the parties to a derivative instrument is replaced with another party, does not, in and of itself, require de-designation of that hedging relationship provided that all other hedge criteria continue to be met. The guidance is effective for financial statements issued for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. An entity has an option to apply the amendments either on a prospective basis or on a modified retrospective basis. The Company is in the process of evaluating the impact, if any, of this new guidance. In February 2016, the FASB issued guidance modifying the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e. lessees and lessors). The new standard requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase by the lessee. This classification will determine whether lease expense is recognized based on an effective interest method or on a straight line basis over the term of the lease, respectively. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. Leases with a term of 12 months or less will be accounted for in the same manner as operating leases today. The new standard requires lessors to account for leases using an approach that is substantially equivalent to existing guidance for sales-type leases, direct financing leases and operating leases. The guidance supersedes previously issued guidance under ASC Topic 840 “Leases.” The guidance is effective on January 1, 2019, with early adoption permitted. The Company is in the process of evaluating the impact of this new guidance. In May 2014, the FASB issued guidance requiring revenue to be recognized in an amount that reflects the consideration expected to be received in exchange for goods and services. The guidance requires the disclosure of sufficient quantitative and qualitative information for financial statement users to understand the nature, amount, timing and uncertainty of revenue and associated cash flows arising from contracts with customers. On July 9, 2015, the FASB elected to defer the effective date of the revenue recognition standard by one year. Reporting entities may choose to adopt the standard as of the original effective date or for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. Calendar year-end public entities are therefore required to apply the new revenue guidance beginning in their 2018 interim and annual financial statements. The Company has not yet determined the impact, if any, that the adoption of this guidance will have on its consolidated financial statements.

Real Estate Investments

Real Estate Investments	3 Months Ended
	Mar. 31, 2016
Real Estate [Abstract]
REAL ESTATE INVESTMENTS	3. REAL ESTATE INVESTMENTS As of March 31, 2016 and December 31, 2015, the gross carrying value of the Properties was as follows (in thousands): March 31, December 31, 2016 2015 Land $ 511,977 $ 513,268 Building and improvements 2,723,438 2,719,780 Tenant improvements 467,778 459,952 3,703,193 3,693,000 Assets held for sale - real estate investments (a) - 794,588 Total $ 3,703,193 $ 4,487,588 (a) Real estate investments related to assets held for sale above represents gross real estate assets and does not include accumulated depreciation or intangible assets on the balance sheets of the properties held for sale. Dispositions The Company sold the following office properties during the three-month period ended March 31, 2016 (dollars in thousands): Disposition Date Property/Portfolio Name Location Number of Properties Rentable Square Feet Sales Price Net Proceeds on Sale Gain (Loss) on Sale (a) February 5, 2016 2970 Market Street (Cira Square) Philadelphia, PA 1 862,692 $ 354,000 $ 350,150 $ 115,828 February 4, 2016 Och-Ziff Portfolio Various (b) 58 3,924,783 398,100 353,971 (372 ) (c) Total Dispositions 59 4,787,475 $ 752,100 $ 704,121 $ 115,456 (a) Gain/(Loss) on Sale is net of closing and other transaction related costs. (b) Exhibit 99.2 to Form 8-K filed on February 10, 2016 contains a complete list of the 58 properties. See also Note 4, " Investment in Unconsolidated Real Estate Ventures ," for further details of the transactions. (c) During the fourth quarter of 2015, the Company recognized an impairment loss totaling approximately $45.4 million on the properties. The loss on sale represents additional closing costs that were not known at settlement. On January 15, 2016, the Company sold 120 acres of undeveloped land located in Berks county Pennsylvania for a sales price of $0.9 million. The land was classified as held for sale as of December 31, 2015. The carrying value of the land exceeded the fair value less the anticipated costs of sale as of December 31, 2015, therefore the Company recognized an impairment loss of $0.3 million during the fourth quarter of 2015. There was no gain or loss recognized on the sale of the land during the first quarter of 2016. The sales of the properties and land referenced above do not represent a strategic shift that has a major effect on the Company's operations and financial results. The operating results of these properties remain classified within continuing operations for all periods presented. Held for Use Impairment As of March, 31, 2016, the Company evaluated the recoverability of the carrying value of its properties under the undiscounted cash flow model. Based on the analysis, it was determined that due to a reduction in management’s intended hold period, the Company would not recover the carrying value of two properties located in its Metropolitan D.C. segment. Accordingly, the Company recorded an impairment charge of "Fair Value Measurements and Disclosures.”

Investment in Unconsolidated Re

Investment in Unconsolidated Real Estate Ventures	3 Months Ended
	Mar. 31, 2016
Equity Method Investments And Joint Ventures [Abstract]
INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES	4. INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES As of March 31, 2016, the Company held ownership interests in 16 unconsolidated Real Estate Ventures for an aggregate investment balance of $278.7 million. The Company formed or acquired interests in these Real Estate Ventures with unaffiliated third parties to develop or manage office, residential, and/or mixed-use properties or to acquire land in anticipation of possible development of office, residential and/or mixed-use properties. As of March 31, 2016, nine of the real estate ventures owned 88 office buildings that contain an aggregate of approximately 8.1 million net rentable square feet; two real estate ventures owned 4.3 acres of undeveloped parcels of land; three real estate ventures owned 2.2 acres of land under active development; one real estate venture owned a residential tower that contains 345 apartment units and one real estate venture owned an apartment complex that contains 398 units. The Company accounts for its unconsolidated interests in the Real Estate Ventures using the equity method. The Company’s unconsolidated interests range from 20% to 70%, subject to specified priority allocations of distributable cash in certain of the Real Estate Ventures. The Company earned management fees from its Real Estate Ventures of $1.5 million and $1.2 million for the three-month periods ended March 31, 2016 and March 31, 2015, respectively. The Company has outstanding accounts receivable balances from its Real Estate Ventures of $1.3 million and $1.7 million as of March 31, 2016 and December 31, 2015, respectively. The amounts reflected in the following tables (except for the Company’s share of equity and income) are based on the financial information of the individual Real Estate Ventures. The Company does not record operating losses of a Real Estate Venture in excess of its investment balance unless the Company is liable for the obligations of the Real Estate Venture or is otherwise committed to provide financial support to the Real Estate Venture. The following is a summary of the financial position of the Real Estate Ventures as of March 31, 2016 and December 31, 2015 (in thousands): March 31, 2016 December 31, 2015 Net property $ 1,483,966 $ 1,258,999 Other assets 237,710 158,672 Other liabilities 155,678 68,028 Debt, net 981,126 794,571 Equity 584,872 554,072 Company’s share of equity (Company’s basis) (a) (b) $ 278,659 $ 241,004 (a) This amount includes 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. (b) Does not include the negative investment balance in one real estate venture totaling $1.1 million as of December 31, 2015, which is included in other liabilities. There is no negative investment balance as of March 31, 2016 because the Company sold its entire remaining 50% interest in the applicable real estate venture (See “ Coppell Associates ” section below) during the three months ended March 31, 2016. The following is a summary of results of operations of the Real Estate Ventures in which the Company had interests as of March 31, 2016 and 2015 (in thousands): Three Months Ended March 31, 2016 2015 Revenue $ 46,525 $ 46,109 Operating expenses (26,668 ) (18,533 ) Interest expense, net (8,989 ) (9,846 ) Depreciation and amortization (20,160 ) (19,124 ) Net loss (a) $ (9,292 ) $ (1,394 ) Company’s share of income (loss) (Company’s basis) $ (403 ) $ 131 (a) This amount includes $6.4 million of acquisition deal costs related to the formation of the MAP Venture during the first quarter of 2016. evo at Cira Centre South Venture On January 25, 2013, the Company formed HSRE-Campus Crest IX Real Estate Venture ("evo at Cira"), a joint venture among the Company and two unaffiliated third parties: Campus Crest Properties, LLC ("Campus Crest") and HSRE-Campus Crest IXA, LLC ("HSRE"). From formation through March 2, 2016, each of the Company and Campus Crest owned a 30% interest in evo at Cira and HSRE owned a 40% interest. At formation, the Company contributed to evo at Cira its tenancy rights under a long-term ground lease of one acre of land located in the University City submarket of Philadelphia, Pennsylvania, together with associated development rights, at an agreed-upon value of $8.5 million. During the third quarter of 2014, evo at Cira completed construction of a 33-story, 850-bed student housing tower on the contributed one-acre ground lease. As of December 31, 2014, the Company and other members of evo at Cira had funded 100% of their respective shares of committed equity contributions and the real estate venture had fully drawn on its $97.8 million construction facility. In connection with the development of evo at Cira, each of the Company and Campus Crest provided to the lender under the construction financing, in addition to customary non-recourse carve-out guarantees, a completion guaranty and cost overrun guaranty, as well as a payment guaranty (with the Company's share of the payment guaranty being approximately $24.7 million). On March 2, 2016, the Company paid $12.8 million of cash and HSRE paid $6.6 million of cash to evo at Cira to purchase Campus Crest’s entire 30% interest in evo at Cira and, as a result, each of the Company and HSRE owns a 50% interest in evo at Cira. Subsequent to the transaction, the Company’s investment basis in evo at Cira is $28.3 million. In conjunction with the purchase, the Company and HSRE entered into an amended and restated operating agreement to govern their rights and obligations as sole members of evo at Cira. Also in conjunction with the purchase, the Company became the sole guarantor under the completion and cost overrun guaranty and executed an amended payment guaranty covering up to $26.5 million of principal on the construction loan as well as interest and certain other impositions and expense items. In addition, the Company and HSRE have provided customary non-recourse carve-out guarantees for the benefit of the lender. The Company has accounted for its investment in evo at Cira under the equity method of accounting. Based upon the reconsideration event caused by the purchase of Campus Crest’s entire 30% interest in evo at Cira and the entry into the amended and restated operating agreement, the Company reassessed its consolidation conclusion. The Company determined that this Real Estate Venture remains a VIE in accordance with the accounting standard for the consolidation of VIEs. As a result, the Company continues to use the variable interest model under the accounting standard for consolidation in order to determine whether to consolidate evo at Cira. Based upon each member's shared power over the activities that significantly impact the operations and revenues of evo at Cira under the operating agreement and related agreements, evo at Cira is not consolidated by the Company, and is accounted for under the equity method of accounting. Through the acquisition of the additional equity interest in evo at Cira, the Company did not gain control of evo at Cira; therefore, it is not required to remeasure its previously held equity interest to fair value at the date that it acquired the additional equity interest. The Company is a general partner in evo at Cira and it is obligated to fund the operating losses of evo at Cira. Accordingly, the Company can incur losses in excess of its investment basis. MAP Venture On February 4, 2016, Brandywine Operating Partnership, L.P., together with subsidiaries of the Operating Partnership, entered into a series of related transactions (the “Och-Ziff Sale”) with affiliates of Och-Ziff Capital Management Group LLC (“Och-Ziff”) that resulted in the disposition by the Company of 58 office properties that contain an aggregate of 3,924,783 square feet for an aggregate purchase price of $398.1 million. The 58 properties are located in the Pennsylvania Suburbs, New Jersey/Delaware, Metropolitan Washington, D.C. and Richmond, Virginia segments. The related transactions involved: (i) the sale by the Company to MAP Fee Owner LLC, an affiliate of Och-Ziff (the “O-Z Land Purchaser”), of 100% of the Company’s fee interests in the land parcels (the “Land Parcels”) underlying the 58 office properties, together with rights to be the lessor under long-term ground leases (the “Ground Leases”) covering the Land Parcels; (ii) the Company’s formation of MAP Ground Lease Venture LLC (the “MAP Venture”) with MAP Ground Lease Holdings LLC, an affiliate of Och-Ziff (the “O-Z Venture Partner”), (iii) the Company’s sale to MAP Venture of the office buildings and related improvements (the “Buildings”) situated on the Land Parcels; and (iv) the retention of a 50% non-controlling equity interest in the MAP Venture. The MAP Venture leases the Land Parcels from O-Z Land Purchaser through a ground lease that extends through February 2115. Annual payments by the MAP Venture, as tenant under the Ground Leases, initially total $11.9 million and increase 2.5% annually through November 2025. At closing on February 4, 2016, the MAP Venture obtained third party non-recourse debt financing of approximately $180.8 million secured by mortgages on the Buildings of the MAP Venture. As a result of this transaction, the Company received $354.0 million in proceeds and maintains a 50% ownership interest in the MAP Venture valued as of February 4, 2016 at $25.2 million, which holds the leasehold interest in the Buildings. The MAP Venture was formed as a limited liability company in which the Company has been designated as the Managing Member. In addition, through an affiliate, the Company provides property management services at the Buildings on behalf of the MAP Venture for a market based management fee. The Company has determined that the MAP Venture is a VIE in accordance with the accounting standard for consolidation of VIE’s. As a result, the Company used the VIE model under the accounting standard for consolidations to determine if it will consolidate the MAP Venture. Based on the provisions in the limited liability company agreement, the Company determined that it shares with O-Z Venture Partner the power to control the activities that most significantly impact the economics of the MAP Venture. Since control is shared, the Buildings were deconsolidated by the Company and accounted for under the equity method of accounting. The Company is not required to fund the operating losses of the MAP Venture. Accordingly, it can only incur losses equal to its investment basis in MAP Venture. The Company has determined that this transaction does not represent a significant shift in the Company’s operations that have a major impact on the Company’s economic performance. As a result, the properties are not classified as discontinued operations on the consolidated financial statements. Coppell Associates On January 29, 2016, the Company sold its entire 50% interest in an unconsolidated real estate venture known as Coppell Associates. The proceeds to the Company, net of closing costs and related debt payoff, were $4.6 million. The carrying amount of the Company’s investment in Coppell Associates amounted to a $1.1 million liability at the sale date, resulting in a $5.7 million gain on sale of its interest in the real estate venture. The investment was in a liability position because the Company, as a general partner, was required to fund losses of Coppell Associates. The negative investment balance represented the Company’s share of unfunded cumulative losses incurred in excess of its investment basis as of the date of sale. Guarantees As of March 31, 2016, the Company had provided guarantees on behalf of certain real estate ventures, consisting of (i) a $26.5 million payment guarantee on the $97.8 million construction loan for evo at Cira; (ii) a $3.2 million payment guarantee on the $56.0 million construction loan for TB-BDN Plymouth Apartments; (iii) a several cost overrun guaranty on the $88.9 million construction loan for the development project being undertaken by 1919 Market Street LP; and (iv) a $0.5 million payment guarantee on a loan provided to PJP VII. In addition, during construction undertaken by real estate ventures, 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. For additional information regarding these real estate ventures, see Note 4, " Investment in Unconsolidated Real Estate Ventures,

Intangible Assets and Liabiliti

Intangible Assets and Liabilities	3 Months Ended
	Mar. 31, 2016
Goodwill And Intangible Assets Disclosure [Abstract]
INTANGIBLE ASSETS AND LIABILITIES	5. INTANGIBLE ASSETS AND LIABILITIES As of March 31, 2016 and December 31, 2015, the Company’s intangible assets/liabilities were comprised of the following (in thousands): March 31, 2016 Total Cost Accumulated Amortization Intangible Assets, net Intangible assets, net: In-place lease value $ 149,980 $ (57,030 ) $ 92,950 Tenant relationship value 18,900 (15,000 ) 3,900 Above market leases acquired 5,160 (1,947 ) 3,213 Total intangible assets, net $ 174,040 $ (73,977 ) $ 100,063 Acquired lease intangibles, net: Below market leases acquired $ 45,826 $ (22,578 ) $ 23,248 December 31, 2015 Total Cost Accumulated Amortization Intangible Assets, net Intangible assets, net: In-place lease value $ 161,276 $ (57,063 ) $ 104,213 Tenant relationship value 20,117 (15,580 ) 4,537 Above market leases acquired 5,333 (1,879 ) 3,454 186,726 (74,522 ) 112,204 Assets held for sale (2,854 ) 2,273 (581 ) Total intangible assets, net $ 183,872 $ (72,249 ) $ 111,623 Acquired lease intangibles, net: Below market leases acquired $ 50,025 $ (24,178 ) $ 25,847 Assets held for sale (1,069 ) 877 (192 ) Total acquired lease intangibles, net $ 48,956 $ (23,301 ) $ 25,655 As of March 31, 2016, the Company’s annual amortization for its intangible assets/liabilities were as follows (in thousands, and assuming no prospective early lease terminations): Assets Liabilities 2016 (nine months remaining) $ 26,791 $ 5,092 2017 20,012 3,356 2018 11,853 2,201 2019 10,609 1,885 2020 8,513 1,337 Thereafter 22,285 9,377 Total $ 100,063 $ 23,248

Debt Obligations

Debt Obligations	3 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
DEBT OBLIGATIONS	6. DEBT OBLIGATIONS During the three month period ended March 31, 2016, the Company repaid $1.6 million of principal on its mortgage debt pursuant to scheduled principal payments. As of March 31, 2016, there was no outstanding balance on the Company’s unsecured line of credit. On January 14, 2016, the Company funded $265.8 million to prepay two mortgage loans, consisting of $176.9 million of principal repayment, $44.5 million in prepayment charges and a nominal amount of accrued interest, in repayment of the mortgage indebtedness on the office property located at 2970 Market Street in Philadelphia, Pennsylvania commonly known as 30 th As of March 31, 2016, and December 31, 2015, The Parent Company unconditionally guarantees the unsecured debt obligations of the Operating Partnership (or is a co-borrower with the Operating Partnership) but does not by itself incur unsecured indebtedness. The Parent Company has no material assets other than its investment in the Operating Partnership. The Company was in compliance with all financial covenants as of March 31, 2016. Management continuously monitors the Company’s compliance with and anticipated compliance with the covenants. Certain of the covenants restrict management’s ability to obtain alternative sources of capital. While the Company currently believes it will remain in compliance with its covenants, in the event that the economy deteriorates in the future, the Company may not be able to remain in compliance with such covenants, in which case a default would result absent a lender waiver.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
FAIR VALUE OF FINANCIAL INSTRUMENTS	7. FAIR VALUE OF FINANCIAL INSTRUMENTS Financial assets and liabilities recorded on the consolidated balance sheets are categorized based on the inputs to the valuation techniques as follows: · Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access; · Level 2 inputs are inputs, other than quoted prices included in Level 1, which are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals; and · Level 3 inputs are unobservable inputs for the asset or liability, which is typically based on an entity’s own assumptions, as there is little, if any, related market activity or information. The Company determined the fair values disclosed below using available market information and discounted cash flow analyses as of March 31, 2016 and December 31, 2015, respectively. The discount rate used in calculating fair value is the sum of the current risk free rate and the risk premium on the date of measurement of the instruments or obligations. Considerable judgment is necessary to interpret market data and to develop the related estimates of fair value. Accordingly, the estimates presented are not necessarily indicative of the amounts that the Company could realize upon disposition. The use of different estimates and valuation methodologies may have a material effect on the fair value amounts shown. The Company believes that the carrying amounts reflected in the consolidated balance sheets at March 31, 2016 and December 31, 2015 approximate the fair values for cash and cash equivalents, accounts receivable, other assets, accounts payable and accrued expenses. The following are financial instruments for which the Company’s estimates of fair value differ from the carrying amounts (in thousands): March 31, 2016 December 31, 2015 Carrying Amount Fair Value Carrying Amount Fair Value Unsecured notes payable $ 1,513,146 $ 1,532,494 $ 1,512,554 $ 1,529,346 Variable rate debt $ 326,492 $ 305,251 $ 326,410 $ 305,522 Mortgage notes payable $ 345,310 $ 354,125 $ 545,753 $ 597,377 The fair value of the Company’s unsecured notes payable is categorized at a Level 2 basis (as provided by the accounting standard for Fair Value Measurements and Disclosures). This is because the Company valued these instruments using quoted market prices as of March 31, 2016 and December 31, 2015. For the fair value of the Company’s unsecured notes, the Company uses a discount rate based on the indicative new issue pricing provided by lenders. The fair value of the Company’s mortgage notes payable, variable rate debt and notes receivable are all categorized at a Level 3 basis (as provided by the accounting standard for Fair Value Measurements and Disclosures). The fair value of the variable rate debt was estimated using a discounted cash flow analysis valuation on the borrowing rates currently available to the Company for loans with similar terms and maturities, as applicable. The fair value of the mortgage debt was determined by discounting the future contractual interest and principal payments by a blended market rate for loans with similar terms, maturities and loan-to-value. These financial instruments have been categorized as Level 3 because the Company considers the rates used in the valuation techniques to be unobservable inputs. For the Company’s mortgage loans, the Company uses an estimate based discounted cash flow analyses and its knowledge of the mortgage market. The weighted average discount rate for the combined variable rate debt and mortgage loans used as to calculate fair value as of March 31, 2016 and December 31, 2015 was 4.541% and 4.550%, respectively. An increase in the discount rate used in the discounted cash flow model would result in a decrease to the fair value of the Company’s long-term debt. Conversely, a decrease in the discount rate used in the discounted cash flow model would result in an increase to the fair value of the Company’s long-term debt. Disclosure about the fair value of financial instruments is based upon pertinent information available to management as of March 31, 2016 and December 31, 2015. Although management is not aware of any factors that would significantly affect the fair value amounts, such amounts have not been comprehensively revalued for purposes of these financial statements since March 31, 2016, and current estimates of fair value may differ from the amounts presented herein.

Limited Partners' Non-Controlli

Limited Partners' Non-Controlling Interests in the Parent Company	3 Months Ended
	Mar. 31, 2016
Noncontrolling Interest [Abstract]
LIMITED PARTNERS' NON-CONTROLLING INTERESTS IN THE PARENT COMPANY	8. LIMITED PARTNERS' NON-CONTROLLING INTERESTS IN THE PARENT COMPANY Non-controlling 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. Operating Partnership The aggregate book value of the non-controlling interests associated with the redeemable common limited partnership interests in the accompanying consolidated balance sheet of the Parent Company as of March 31, 2016 and December 31, 2015 was $16.2 million and $16.1 million, respectively. Under the applicable accounting guidance, the redemption value of limited partnership units are carried at, on a limited partner basis, the greater of historical cost adjusted for the allocation of income and distributions or 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 dates as of March 31, 2016 and December 31, 2015, respectively, was approximately $21.5 million and $21.0 million.

Fair Value of Derivative Financ

Fair Value of Derivative Financial Instruments	3 Months Ended
	Mar. 31, 2016
Derivative Instruments And Hedging Activities Disclosure [Abstract]
FAIR VALUE OF DERIVATIVE FINANCIAL INSTRUMENTS	9. FAIR VALUE OF DERIVATIVE FINANCIAL INSTRUMENTS The following table summarizes the terms and fair values of the Company’s derivative financial instruments as of March 31, 2016 and December 31, 2015. 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 and included in other liabilities on the Company’s consolidated balance sheets). Hedge Product Hedge Type Designation Notional Amount Strike Trade Date Maturity Date Fair value 3/31/2016 12/31/2015 3/31/2016 12/31/2015 (Liabilities) / Assets Swap Interest Rate Cash Flow (a) $ 250,000 $ 250,000 3.718 % October 8, 2015 October 8, 2022 $ (6,369 ) $ 1,884 Swap Interest Rate Cash Flow (a) 25,774 25,774 3.300 % December 22, 2011 January 30, 2021 (1,162 ) (531 ) Swap Interest Rate Cash Flow (a) 25,774 25,774 3.090 % January 6, 2012 October 30, 2019 (819 ) (388 ) Swap Interest Rate Cash Flow (a) 27,062 27,062 2.750 % December 21, 2011 September 30, 2017 (290 ) (201 ) $ 328,610 $ 328,610 (a) Hedging unsecured variable rate debt. The Company measures its derivative instruments at fair value and records them in the balance sheet as either an asset or liability. As of March 31, 2016, all swaps are included in other liabilities on the Company’s consolidated balance sheet. 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 its derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy.

Beneficiaries Equity of the Par

Beneficiaries Equity of the Parent Company	3 Months Ended
	Mar. 31, 2016
Equity [Abstract]
BENEFICIARIES’ EQUITY OF THE PARENT COMPANY	10. BENEFICIARIES’ EQUITY OF THE PARENT COMPANY Earnings per Share (EPS) The following tables detail the number of shares and net income used to calculate basic and diluted earnings per share (in thousands, except share and per share amounts; results may not add due to rounding): Three Months Ended March 31, 2016 2015 Basic Diluted Basic Diluted Numerator Income from continuing operations $ 46,310 $ 46,310 $ 8,594 $ 8,594 Net income from continuing operations attributable to non-controlling interests (389 ) (389 ) (58 ) (58 ) Nonforfeitable dividends allocated to unvested restricted shareholders (105 ) (105 ) (101 ) (101 ) Preferred share dividends (1,725 ) (1,725 ) (1,725 ) (1,725 ) Net income attributable to common shareholders $ 44,091 $ 44,091 $ 6,710 $ 6,710 Denominator Weighted-average shares outstanding 174,788,945 174,788,945 179,562,930 179,562,930 Contingent securities/Share based compensation - 682,468 - 1,092,342 Weighted-average shares outstanding 174,788,945 175,471,413 179,562,930 180,655,272 Earnings per Common Share: Net income attributable to common shareholders $ 0.25 $ 0.25 $ 0.04 $ 0.04 Redeemable common limited partnership units totaling 1,535,102 in both March 31, 2016 and March 31, 2015, 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 month periods ended March 31, 2016 and 2015, 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 and Preferred Shares On March 9, 2016, the Parent Company declared a distribution of $0.15 per common share, totaling $26.6 million, which was paid on April 18, 2016 to shareholders of record as of April 4, 2016. In addition, the Parent Company declared distributions on its Series E Preferred Shares to holders of record as of March 30, 2016. These shares are entitled to a preferential return of 6.90% per annum on the $25.00 per share liquidation preference. Distributions paid on April 15, 2016 to holders of Series E Preferred Shares totaled $1.7 million. On November 5, 2013, the Parent Company commenced a continuous equity offering program (the “Offering Program”), under which it may sell, in at-the-market offerings, up to an aggregate amount of 16,000,000 common shares until November 5, 2016. The Parent Company may sell common shares in amounts and at times to be determined by the Parent Company. Actual sales will depend on a variety of factors to be determined by the Parent Company, including, among others, market conditions, the trading price of the Company’s common shares and determinations by the Parent Company of the appropriate sources of funding. Sales agents engaged by the Parent Company under the Offering Program are entitled to receive as compensation an aggregate, of up to 2% of the gross sales price per share sold under the Offering Program. From inception of the Offering Program through March 31, 2016, the Parent Company had not sold any shares under the program, leaving 16,000,000 remaining shares available for sale. Common Share Repurchases The Parent Company maintains a share repurchase program under which the Board of Trustees has authorized the Parent Company to repurchase shares of its preferred and common stock with no expiration date. On July 22, 2015, the Parent Company's Board of Trustees authorized additional share repurchases of up to $100.0 million. Prior to the authorization 539,200 common shares were available for repurchase under the preexisting share repurchase program. The Company expects to fund the share repurchases with a combination of available cash balances and availability under our line of credit. As of March 31, 2016, 5,209,437 common shares have been repurchased and retired at an average purchase price of $12.90 per share and totaling $67.3 million. The timing and amounts of any purchases will depend on a variety of factors, including market conditions, regulatory requirements, share prices, capital availability and other factors as determined by our management team. The repurchase program does not require the purchase of any minimum number of shares and may be suspended or discontinued at any time without notice. There were no shares repurchased under the program during the three months ended March 31, 2016 or March 31, 2015. Maryland law applicable to the Company does not contemplate treasury stock, and common shares repurchased under the program are accounted for as a reduction of common shares (at $0.01 par value per share) and a decrease to additional paid-in-capital.

Partners Equity of The Operatin

Partners Equity of The Operating Partnership	3 Months Ended
	Mar. 31, 2016
Equity [Abstract]
PARTNERS’ EQUITY OF THE OPERATING PARTNERSHIP	11. PARTNERS’ EQUITY OF THE OPERATING PARTNERSHIP Earnings per Common Partnership Unit The following tables detail the number of units and net income used to calculate basic and diluted earnings per common partnership unit (in thousands, except unit and per unit amounts; results may not add due to rounding): Three Months Ended March 31, 2016 2015 Basic Diluted Basic Diluted Numerator Income from continuing operations $ 46,310 $ 46,310 $ 8,594 $ 8,594 Nonforfeitable dividends allocated to unvested restricted unitholders (105 ) (105 ) (101 ) (101 ) Preferred unit dividends (1,725 ) (1,725 ) (1,725 ) (1,725 ) Net income attributable to non-controlling interests (2 ) (2 ) - - Net income attributable to common unitholders $ 44,478 $ 44,478 $ 6,768 $ 6,768 Denominator Weighted-average units outstanding 176,324,047 176,324,047 181,098,032 181,098,032 Contingent securities/Share based compensation - 682,468 - 1,092,342 Total weighted-average units outstanding 176,324,047 177,006,515 181,098,032 182,190,374 Earnings per Common Partnership Unit: Net income attributable to common unitholders $ 0.25 $ 0.25 $ 0.04 $ 0.04 Unvested restricted units are considered participating securities which require the use of the two-class method for the computation of basic and diluted earnings per share. For the three month periods ended March 31, 2016 and 2015, earnings representing nonforfeitable dividends as noted in the table above 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 and Preferred Mirror Units On March 9, 2016, the Operating Partnership declared a distribution of $0.15 per common partnership unit, totaling $26.6 million, which was paid on April 18, 2016 to unitholders of record as of April 4, 2016. In addition, the Operating Partnership declared distributions on its Series E-Linked Preferred Mirror Units to holders of record as of March 30, 2016. These units are entitled to a preferential return of 6.90% per annum on the $25.00 per unit liquidation preference. Distributions paid on April 15, 2016 to holders of Series E-Linked Preferred Mirror Units totaled $1.7 million.

Share Based Compensation

Share Based Compensation	3 Months Ended
	Mar. 31, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
SHARE BASED COMPENSATION	12. SHARE BASED COMPENSATION Restricted Common Share Awards As of March 31, 2016, 698,382 restricted common shares were outstanding under the Parent Company’s shareholder-approved long-term incentive plan and vest over three years from the initial grant dates. The remaining compensation expense to be recognized at March 31, 2016 was approximately $3.0 million, and is expected to be recognized over a weighted average remaining vesting period of 1.5 years. During the three-month periods ended March 31, 2016 and 2015, the Company recognized compensation expense relating to outstanding restricted common shares of $1.2 million and $1.3 million, respectively, of which $0.3 million and $0.3 million, respectively, were capitalized as part of the Company’s review of employee salaries eligible for capitalization. The following table summarizes the Company’s restricted common share activity during the three months ended March 31, 2016: Shares Weighted Average Grant Date Fair Value Aggregate Intrinsic Value Non-vested at January 1, 2016 506,147 $ 14.50 Granted 195,526 12.58 $ 2,448 Vested - - Forfeited (3,291 ) 14.49 Non-vested at March 31, 2016 698,382 $ 14.02 $ 9,798 On February 22, 2016, the Compensation Committee of the Parent Company’s Board of Trustees awarded to officers of the Company an aggregate 141,358 cliff vest on April 15, 2019. In addition, on March 8, 2016, the Compensation Committee awarded non-officer employees 54,168 . Vesting of restricted common shares is subject to acceleration upon certain events, including if the recipient of the award were to die, become disabled or, in certain cases, retire in a qualifying retirement. Qualifying retirement generally means the recipient’s voluntary termination of employment after reaching at least age 57 and accumulating at least 15 years of service with the Company. In addition, in the case of our President and Chief Executive Officer, vesting would also accelerate if we were to terminate him without cause, or if he were to resign for good reason under his employment agreement. In addition, if we were to undergo a change of control, then unvested shares would also accelerate if, in connection with the change of control or within a specified period after the change of control, the holder’s employment were to terminate in a qualifying termination or resignation. In accordance with the accounting standard for stock-based compensation, the Company amortizes share-based compensation costs through the qualifying retirement dates for those executives who meet the conditions for qualifying retirement during the scheduled vesting period and whose award agreements provide for vesting upon a qualifying retirement. Restricted Performance Share Units Plan The Compensation Committee of the Parent Company’s Board of Trustees has granted performance share-based awards (referred to as Restricted Performance Share Units, or RPSUs) to officers of the Parent Company. The RPSUs are settled in common shares, with the number of common shares, if any, issuable in settlement determined based on the Company’s total shareholder return over specified measurement periods compared to total shareholder returns of comparative groups over the measurement periods. The table below presents certain information as to unvested RPSU awards. RPSU Grant 3/11/2014 3/12/2014 2/23/2015 2/22/2016 Total (Amounts below in shares, unless otherwise noted) Non-vested at January 1, 2016 123,155 61,720 179,392 - 364,267 Units Granted - - - 231,388 231,388 Units Accelerated for Qualifying Retirement - - - - - Non-vested at March 31, 2016 123,155 61,720 179,392 231,388 595,655 Measurement Period Commencement Date 1/1/2014 1/1/2014 1/1/2015 1/1/2016 Measurement Period End Date 12/31/2016 12/31/2016 12/31/2017 12/31/2018 Units Granted 134,284 61,720 186,395 231,388 Fair Value of Units on Grant Date (in thousands) $ 2,624 $ 1,255 $ 3,933 $ 3,558 The Company values each RPSU on its grant date using a Monte Carlo simulation. The fair values of each award are being amortized over the three year cliff vesting period. The vesting of RPSUs is subject to acceleration upon a change in control or if the recipient of the award were to die, become disabled or retire in a qualifying retirement prior to the vesting date. In accordance with the accounting standard for stock-based compensation, the Company amortizes share-based compensation costs through the qualifying retirement date for those executives who meet the conditions for qualifying retirement during the scheduled vesting period. For the three months ended March 31, 2016, the Company recognized total compensation expense for the 2016, 2015 and 2014 RPSU awards of $1.7 million, of which $0.5 million was capitalized consistent with the Company’s policies for capitalizing eligible portions of employee compensation. For the three months ended March 31, 2015, the Company recognized total compensation expense for the 2015, 2014 and 2013 RPSU awards of $2.4 million, of which $0.5 million was capitalized consistent with the Company’s policies for capitalizing eligible portions of employee compensation. The remaining compensation expense to be recognized at March 31, 2016 was approximately $2.6 million, and is expected to be recognized over a weighted average remaining vesting period of 1.8 years. The Company issued 156,415 common shares on February 1, 2016 in settlement of RPSUs that had been awarded on February 25, 2013 (with a three-year measurement period ended December 31, 2015). Holders of these RPSUs also received a cash dividend of $0.15 per share for these common shares on February 5, 2016.

Segment Information

Segment Information	3 Months Ended
	Mar. 31, 2016
Segment Reporting [Abstract]
SEGMENT INFORMATION	13. SEGMENT INFORMATION During the year ended December 31, 2015, the Company managed its portfolio within seven segments: (1) Pennsylvania Suburbs, (2) Philadelphia Central Business District (CBD), (3) Metropolitan Washington, D.C., (4) New Jersey/Delaware, (5) Richmond, Virginia, (6) Austin, Texas and (7) California. As a result of the Och-Ziff Sale that occurred on February 4, 2016, the Company has narrowed its segments to five segments located in: (1) Pennsylvania Suburbs, (2) Philadelphia Central Business District (“CBD”), (3) Metropolitan Washington, D.C. and (4) Austin, Texas. The Och-Ziff Sale disposed of the entire Richmond, Virginia segment. Subsequent to the Och-Ziff Sale, the segments previously defined as New Jersey/Delaware and California are now being managed as a consolidated segment entitled (5) “Other,” as these geographies no longer provide a significant revenue contribution. The Pennsylvania Suburbs segment includes properties in Chester, Delaware, and Montgomery counties in the Philadelphia suburbs. The Philadelphia CBD segment includes properties located in the City of Philadelphia in Pennsylvania. The Metropolitan Washington, D.C. segment includes properties in the District of Columbia, Northern Virginia and southern Maryland. The Austin, Texas segment includes properties in the City of Austin, Texas. 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 are transferred to operating properties by region upon completion of the associated construction or project. The following tables provide selected asset information and results of operations of the Company's reportable segments (in thousands): Real estate investments, at cost: March 31, 2016 December 31, 2015 Philadelphia CBD (a) $ 1,172,188 $ 1,157,667 Pennsylvania Suburbs (b) 1,017,947 1,019,280 Metropolitan Washington, D.C. (b) 1,124,662 1,129,206 Austin, Texas 165,413 164,518 Other (b), (c) 222,983 222,329 $ 3,703,193 $ 3,693,000 Assets held for sale (a), (b) - 794,588 Operating Properties $ 3,703,193 $ 4,487,588 Corporate Construction-in-progress $ 319,656 $ 268,983 Land held for development $ 132,747 $ 130,479 (a) As of December 31, 2015, the office property located at 2970 Market Street in Philadelphia, Pennsylvania commonly known as 30 th "Real Estate Investments," (b) As of December 31, 2015, the 58 properties associated with the series of related transactions with Och-Ziff Real Estate were classified as held for sale on the consolidated balance sheets. On February 4, 2016, the Company completed the series of transactions, resulting in the disposition of the properties. See Note 3, “Real Estate Investments,” ( c ) As a result of the Och-Ziff Sale that occurred on February 4, 2016, the Company narrowed its segments to five segments located in: (1) Pennsylvania Suburbs, (2) Philadelphia Central Business District (“CBD”), (3) Metropolitan Washington, D.C. and (4) Austin, Texas. The Och-Ziff Sale disposed of the entire Richmond, Virginia segment. Subsequent to the Och-Ziff Sale, the segments previously defined as New Jersey/Delaware and California are now being managed as a consolidated segment entitled (5) “Other,” as these geographies no longer provide a significant revenue contribution. Accordingly, the chief operating decision maker revised the management structure, reallocated resources, and is assessing business operations of the five segments as of January 1, 2016. Net operating income (in thousands): Three-month periods ended March 31, 2016 2015 Total revenue Operating expenses (a) Net operating income Total revenue Operating expenses (a) Net operating income Philadelphia CBD $ 49,670 $ (19,256 ) $ 30,414 $ 52,973 $ (18,390 ) $ 34,583 Pennsylvania Suburbs 37,106 (13,155 ) 23,951 39,890 (14,585 ) 25,305 Metropolitan Washington, D.C. 27,339 (10,899 ) 16,440 27,406 (11,860 ) 15,546 Austin, Texas (b) 8,547 (3,255 ) 5,292 934 (870 ) 64 Other (c) 12,740 (7,602 ) 5,138 27,781 (14,578 ) 13,203 Corporate 1,100 (608 ) 492 1,422 (415 ) 1,007 Operating Properties $ 136,502 $ (54,775 ) $ 81,727 $ 150,406 $ (60,698 ) $ 89,708 (a) Includes property operating expense, real estate taxes and third party management expense. (b) On June 22, 2015 the Company acquired the remaining 50.0% interest in Broadmoor Austin Associates. As such, the Company has seven wholly owned properties in its Austin, Texas business segment at March 31, 2016. In addition, net operating income for the three months ended March 31, 2016 and 2015 includes management fees and related expenses for services provided by the Company to the Austin Venture (c) See footnote (c) at the “Real estate investments, at cost” table above for further information regarding this segment. Unconsolidated real estate ventures (in thousands): Investment in real estate ventures, at equity Equity in income (loss) of real estate ventures As of Three Months Ended March 31, March 31, 2016 December 31, 2015 2016 2015 Philadelphia CBD (a) $ 57,477 $ 44,089 $ 455 $ (300 ) Pennsylvania Suburbs 16,737 16,408 265 (6 ) Metropolitan Washington, D.C. 119,713 118,422 (448 ) (50 ) MAP Venture (b) 24,554 - (556 ) - Other (c) 1,551 1,657 161 134 Austin, Texas (d) 58,627 60,428 (280 ) 353 Total $ 278,659 $ 241,004 $ (403 ) $ 131 (a) Investment in real estate ventures increased by $12.8 million as a result of the Company’s cash payment to evo at Cira to purchase Campus Crest’s entire 30% interest in evo at Cira and, as a result, each of the Company and HSRE owns a 50% interest in evo at Cira. See Note 4, “ Investment in Unconsolidated Real Estate Ventures, (b) The MAP Venture represents a joint venture formed between the Company and MAP Ground Lease Holdings LLC, an affiliate of Och-Ziff Capital Management Group, LLC, on February 4, 2016. See Note 4 “ Investment in Unconsolidated Real Estate Ventures, (c) See footnote (c) at the “Real estate investments, at cost” table above for further information regarding this segment. (d) Investment in real estate ventures does not include the $1.1 million negative investment balance in one real estate venture as of December 31, 2015, which is included in other liabilities. The Company disposed of its interest in this venture during the first quarter of 2016. See Note 4, " Investment in Unconsolidated Real Estate Ventures Net operating income (“NOI”) is a non-GAAP financial measure defined as total revenue less property operating expenses, real estate taxes and third party management expenses. Segment NOI includes revenue, real estate taxes and property operating expenses directly related to operation and management of the properties owned and managed within the respective geographical region. Segment NOI excludes property level depreciation and amortization, revenue and expenses directly associated with third party real estate management services, expenses associated with corporate administrative support services, and inter-company eliminations. NOI also does not reflect general and administrative expenses, interest expenses, real estate impairment losses, depreciation and amortization costs, capital expenditures and leasing costs. Trends in development and construction activities that could materially impact the Company’s results from operations are also not reflected in NOI. All companies may not calculate NOI in the same manner. NOI is the measure that is used by the Company to evaluate the operating performance of its real estate assets by segment. The Company also believes that NOI provides useful information to investors regarding its financial condition and results of operations because it reflects only those income and expenses recorded at the property level. The Company believes that net income, as defined by GAAP, is the most appropriate earnings measure. The following is a reconciliation of consolidated NOI to consolidated net income, as defined by GAAP (in thousands): Three Months Ended March 31, 2016 2015 Consolidated net operating income $ 81,727 $ 89,708 Less: Interest expense (23,691 ) (28,176 ) Interest expense - amortization of deferred financing costs (774 ) (1,079 ) Interest expense - financing obligation (281 ) (286 ) Depreciation and amortization (48,873 ) (51,111 ) General and administrative expenses (9,120 ) (8,636 ) Equity in income (loss) of real estate ventures (403 ) 131 Provision for impairment (7,390 ) (1,726 ) Loss on early extinguishment of debt (66,590 ) - Plus: Interest income 320 750 Net gain on disposition of real estate 115,456 9,019 Net gain on real estate venture transactions 5,929 - Net income $ 46,310 $ 8,594

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2016
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 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 is an associated $10.0 million letter of credit for a mortgage lender at March 31, 2016. 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. Ground Rent Future minimum rental payments by the Company under the terms of all non-cancelable ground leases of land on which properties in the Company’s consolidated portfolio are situated are expensed on a straight-line basis regardless of when payments are due. The Company’s ground leases have remaining lease terms ranging from 5 to 73 years. Minimum future rental payments on non-cancelable leases at March 31, 2016 are as follows (in thousands): Year Minimum Rent 2016 (nine months remaining) $ 995 2017 1,327 2018 1,327 2019 1,327 2020 1,327 Thereafter 67,269 Total $ 73,572 The Company obtained ground tenancy rights related to two properties in Philadelphia, Pennsylvania, which provide for contingent rent participation by the lessor in certain capital transactions and net operating cash flows of the properties after certain returns are achieved by the Company. Such amounts, if any, will be reflected as contingent rent when incurred. The leases also provide for payment by the Company of certain operating costs relating to the land, primarily real estate taxes. The above schedule of future minimum rental payments does not include any contingent rent amounts or any reimbursed expenses. Reference is made in our Annual Report on Form 10-K for the year ended December 31, 2015 for further detail regarding commitments and contingencies. Put Option On May 4, 2015, the Company entered into a put agreement in the ordinary course of business that grants an unaffiliated third party the unilateral option to require the Company to purchase a property, at a predetermined price, until May 4, 2018. In addition to the $35.0 million purchase price, the Company would be responsible for transaction and closing costs. There can be no assurance that the counterparty will exercise the option. Fair Value of Contingent Consideration On April 2, 2015, the Company purchased 618 Market Street in Philadelphia, Pennsylvania. The allocated purchase price included contingent consideration of $2.0 million payable to the seller upon commencement of development. The liability was initially recorded at fair value of $1.6 million and will accrete through interest expense to $2.0 million over the expected period until development is commenced. The fair value of this contingent consideration was determined using a probability weighted discounted cash flow model. The significant inputs to the discounted cash flow model were the discount rate and weighted probability scenarios. As the inputs are unobservable, the Company determined the inputs used to value this liability fall within Level 3 for fair value reporting. As of March 31, 2016, the liability had accreted to $1.7 million. As there were no significant changes to the inputs, the liability remains within Level 3 for fair value reporting. Debt Guarantees As of March 31, 2016, the Company had provided guarantees on behalf of certain real estate ventures, consisting of (i) a $26.5 million payment guarantee on the $97.8 million construction loan for evo at Cira; (ii) a $3.2 million payment guarantee on the $56.0 million construction loan for TB-BDN Plymouth Apartments; (iii) a several cost overrun guaranty on the $88.9 million construction loan for the development project being undertaken by 1919 Market Street LP; and (iv) a $0.5 million payment guarantee on a loan provided to PJP VII. See Note 4, " Investment in Unconsolidated Real Estate Ventures," Capital Expenditures Amounts remaining to be incurred as of March 31, 2016 included the following: • development and redevelopment obligations of $196.4 million (including acquisitions of land); and • capital expenditures for tenant improvements of $54.0 million.

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2016
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	15. SUBSEQUENT EVENTS Two Logan Square Mortgage Financing On April 7, 2016, the Company closed on an $86.9 million first mortgage financing on Two Logan Square, a 708,844-square foot office property located in Philadelphia, Pennsylvania. The loan bears interest at 3.98% per annum and matures on May 1, 2020. Proceeds of the loan were used to repay, without penalty, the $86.6 million principal balance of the former Two Logan Square first mortgage loan, which had a 7.57% effective interest rate. Guaranteed Unsecured Notes Repayment On April 1, 2016, the Company repaid the entire $149.9 million principal balance of its 2016 6.00% Guaranteed Unsecured Notes upon maturity. The Company used its available cash balances to fund the repayment of the unsecured notes.

Basis of Presentation (Policies

Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2016
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 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 (consisting solely of normal recurring matters) for a fair statement of the financial position of the Company as of March 31, 2016, the results of its operations for the three-month periods ended March 31, 2016 and 2015 and its cash flows for the three-month periods ended March 31, 2016 and 2015 have been included. 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 2015 Annual Report on Form 10-K filed with the SEC on February 29, 2016. On January 1, 2016, the Company adopted accounting guidance under Accounting Standards Codification (ASC) Topic 810, "Consolidation,” modifying the analysis it must perform to determine whether it should consolidate certain types of legal entities. The guidance does not amend the existing disclosure requirements for variable interest entities (“VIEs”) or voting interest model entities. The guidance, however, modified the requirements to qualify under the voting interest model. Under the revised guidance, the Operating Partnership will be a variable interest entity of the Parent Company. As the Operating Partnership is already consolidated in the balance sheets of the Parent Company, the identification of this entity as a variable interest entity has no impact on the consolidated financial statements of the Parent Company. There were no other legal entities qualifying under the scope of the revised guidance that were consolidated as a result of the adoption of this guidance. In addition, there were no other voting interest entities under prior existing guidance determined to be variable interest entities under the revised guidance. The Company's Annual Report on Form 10-K for the year ended December 31, 2015 contains a discussion of our significant accounting policies under Note 2, "Summary of Significant Accounting Policies".
Recent Accounting Pronouncements	Recent Accounting Pronouncements In March 2016, the Financial Accounting Standards Board (FASB) issued guidance intended to simplify various aspects related to how share-based payments are accounted for and presented in the financial statements. The new guidance allows for entities to make an entity-wide accounting policy election to either estimate the number of awards that are expected to vest or account for forfeitures when they occur. In addition, the guidance allows employers to withhold shares to satisfy minimum statutory tax withholding requirements up to the employees’ maximum individual tax rate without causing the award to be classified as a liability. The guidance also stipulates that cash paid by an employer to a taxing authority when directly withholding shares for tax-withholding purposes should be classified as a financing activity on the statement of cash flows. This guidance is effective for annual reporting periods beginning after December 15, 2016, and interim periods within that reporting period. Early adoption is permitted in any interim or annual period, with any adjustments reflected as of the beginning of the fiscal year of adoption. The Company is in the process of evaluating the impact of this new guidance. Also in March 2016, the FASB issued guidance clarifying that a novation of party to a derivative instrument, whereby one of the parties to a derivative instrument is replaced with another party, does not, in and of itself, require de-designation of that hedging relationship provided that all other hedge criteria continue to be met. The guidance is effective for financial statements issued for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. An entity has an option to apply the amendments either on a prospective basis or on a modified retrospective basis. The Company is in the process of evaluating the impact, if any, of this new guidance. In February 2016, the FASB issued guidance modifying the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e. lessees and lessors). The new standard requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase by the lessee. This classification will determine whether lease expense is recognized based on an effective interest method or on a straight line basis over the term of the lease, respectively. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. Leases with a term of 12 months or less will be accounted for in the same manner as operating leases today. The new standard requires lessors to account for leases using an approach that is substantially equivalent to existing guidance for sales-type leases, direct financing leases and operating leases. The guidance supersedes previously issued guidance under ASC Topic 840 “Leases.” The guidance is effective on January 1, 2019, with early adoption permitted. The Company is in the process of evaluating the impact of this new guidance. In May 2014, the FASB issued guidance requiring revenue to be recognized in an amount that reflects the consideration expected to be received in exchange for goods and services. The guidance requires the disclosure of sufficient quantitative and qualitative information for financial statement users to understand the nature, amount, timing and uncertainty of revenue and associated cash flows arising from contracts with customers. On July 9, 2015, the FASB elected to defer the effective date of the revenue recognition standard by one year. Reporting entities may choose to adopt the standard as of the original effective date or for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. Calendar year-end public entities are therefore required to apply the new revenue guidance beginning in their 2018 interim and annual financial statements. The Company has not yet determined the impact, if any, that the adoption of this guidance will have on its consolidated financial statements.

Real Estate Investments (Tables

Real Estate Investments (Tables)	3 Months Ended
	Mar. 31, 2016
Real Estate [Abstract]
Gross Carrying Value Of Properties	As of March 31, 2016 and December 31, 2015, the gross carrying value of the Properties was as follows (in thousands): March 31, December 31, 2016 2015 Land $ 511,977 $ 513,268 Building and improvements 2,723,438 2,719,780 Tenant improvements 467,778 459,952 3,703,193 3,693,000 Assets held for sale - real estate investments (a) - 794,588 Total $ 3,703,193 $ 4,487,588 (a) Real estate investments related to assets held for sale above represents gross real estate assets and does not include accumulated depreciation or intangible assets on the balance sheets of the properties held for sale.
Dispositions	The Company sold the following office properties during the three-month period ended March 31, 2016 (dollars in thousands): Disposition Date Property/Portfolio Name Location Number of Properties Rentable Square Feet Sales Price Net Proceeds on Sale Gain (Loss) on Sale (a) February 5, 2016 2970 Market Street (Cira Square) Philadelphia, PA 1 862,692 $ 354,000 $ 350,150 $ 115,828 February 4, 2016 Och-Ziff Portfolio Various (b) 58 3,924,783 398,100 353,971 (372 ) (c) Total Dispositions 59 4,787,475 $ 752,100 $ 704,121 $ 115,456 (a) Gain/(Loss) on Sale is net of closing and other transaction related costs. (b) Exhibit 99.2 to Form 8-K filed on February 10, 2016 contains a complete list of the 58 properties. See also Note 4, " Investment in Unconsolidated Real Estate Ventures ," for further details of the transactions. (c) During the fourth quarter of 2015, the Company recognized an impairment loss totaling approximately $45.4 million on the properties. The loss on sale represents additional closing costs that were not known at settlement.

Investment in Unconsolidated 27

Investment in Unconsolidated Real Estate Ventures (Tables)	3 Months Ended
	Mar. 31, 2016
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 as of March 31, 2016 and December 31, 2015 (in thousands): March 31, 2016 December 31, 2015 Net property $ 1,483,966 $ 1,258,999 Other assets 237,710 158,672 Other liabilities 155,678 68,028 Debt, net 981,126 794,571 Equity 584,872 554,072 Company’s share of equity (Company’s basis) (a) (b) $ 278,659 $ 241,004 (a) This amount includes 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. (b) Does not include the negative investment balance in one real estate venture totaling $1.1 million as of December 31, 2015, which is included in other liabilities. There is no negative investment balance as of March 31, 2016 because the Company sold its entire remaining 50% interest in the applicable real estate venture (See “ Coppell Associates ” section below) during the three months ended March 31, 2016.
Summary of Results of Operations of Real Estate Ventures with Interests	The following is a summary of results of operations of the Real Estate Ventures in which the Company had interests as of March 31, 2016 and 2015 (in thousands): Three Months Ended March 31, 2016 2015 Revenue $ 46,525 $ 46,109 Operating expenses (26,668 ) (18,533 ) Interest expense, net (8,989 ) (9,846 ) Depreciation and amortization (20,160 ) (19,124 ) Net loss (a) $ (9,292 ) $ (1,394 ) Company’s share of income (loss) (Company’s basis) $ (403 ) $ 131 (a) This amount includes $6.4 million of acquisition deal costs related to the formation of the MAP Venture during the first quarter of 2016.

Intangible Assets and Liabili28

Intangible Assets and Liabilities (Tables)	3 Months Ended
	Mar. 31, 2016
Goodwill And Intangible Assets Disclosure [Abstract]
Summary of Intangible Assets and Liabilities	As of March 31, 2016 and December 31, 2015, the Company’s intangible assets/liabilities were comprised of the following (in thousands): March 31, 2016 Total Cost Accumulated Amortization Intangible Assets, net Intangible assets, net: In-place lease value $ 149,980 $ (57,030 ) $ 92,950 Tenant relationship value 18,900 (15,000 ) 3,900 Above market leases acquired 5,160 (1,947 ) 3,213 Total intangible assets, net $ 174,040 $ (73,977 ) $ 100,063 Acquired lease intangibles, net: Below market leases acquired $ 45,826 $ (22,578 ) $ 23,248 December 31, 2015 Total Cost Accumulated Amortization Intangible Assets, net Intangible assets, net: In-place lease value $ 161,276 $ (57,063 ) $ 104,213 Tenant relationship value 20,117 (15,580 ) 4,537 Above market leases acquired 5,333 (1,879 ) 3,454 186,726 (74,522 ) 112,204 Assets held for sale (2,854 ) 2,273 (581 ) Total intangible assets, net $ 183,872 $ (72,249 ) $ 111,623 Acquired lease intangibles, net: Below market leases acquired $ 50,025 $ (24,178 ) $ 25,847 Assets held for sale (1,069 ) 877 (192 ) Total acquired lease intangibles, net $ 48,956 $ (23,301 ) $ 25,655
Summary of Amortization for Intangible Assets and Liabilities	As of March 31, 2016, the Company’s annual amortization for its intangible assets/liabilities were as follows (in thousands, and assuming no prospective early lease terminations): Assets Liabilities 2016 (nine months remaining) $ 26,791 $ 5,092 2017 20,012 3,356 2018 11,853 2,201 2019 10,609 1,885 2020 8,513 1,337 Thereafter 22,285 9,377 Total $ 100,063 $ 23,248

Fair Value of Financial Instr29

Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Schedule of Financial Instruments With Fair Values Different From Their Carrying Amount	The following are financial instruments for which the Company’s estimates of fair value differ from the carrying amounts (in thousands): March 31, 2016 December 31, 2015 Carrying Amount Fair Value Carrying Amount Fair Value Unsecured notes payable $ 1,513,146 $ 1,532,494 $ 1,512,554 $ 1,529,346 Variable rate debt $ 326,492 $ 305,251 $ 326,410 $ 305,522 Mortgage notes payable $ 345,310 $ 354,125 $ 545,753 $ 597,377

Fair Value of Derivative Fina30

Fair Value of Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2016
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The following table summarizes the terms and fair values of the Company’s derivative financial instruments as of March 31, 2016 and December 31, 2015. 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 and included in other liabilities on the Company’s consolidated balance sheets). Hedge Product Hedge Type Designation Notional Amount Strike Trade Date Maturity Date Fair value 3/31/2016 12/31/2015 3/31/2016 12/31/2015 (Liabilities) / Assets Swap Interest Rate Cash Flow (a) $ 250,000 $ 250,000 3.718 % October 8, 2015 October 8, 2022 $ (6,369 ) $ 1,884 Swap Interest Rate Cash Flow (a) 25,774 25,774 3.300 % December 22, 2011 January 30, 2021 (1,162 ) (531 ) Swap Interest Rate Cash Flow (a) 25,774 25,774 3.090 % January 6, 2012 October 30, 2019 (819 ) (388 ) Swap Interest Rate Cash Flow (a) 27,062 27,062 2.750 % December 21, 2011 September 30, 2017 (290 ) (201 ) $ 328,610 $ 328,610 (a) Hedging unsecured variable rate debt.

Beneficiaries Equity of the P31

Beneficiaries Equity of the Parent Company (Tables)	3 Months Ended
	Mar. 31, 2016
Equity [Abstract]
Earnings Per Share (EPS), Basic and Diluted	The following tables detail the number of shares and net income used to calculate basic and diluted earnings per share (in thousands, except share and per share amounts; results may not add due to rounding): Three Months Ended March 31, 2016 2015 Basic Diluted Basic Diluted Numerator Income from continuing operations $ 46,310 $ 46,310 $ 8,594 $ 8,594 Net income from continuing operations attributable to non-controlling interests (389 ) (389 ) (58 ) (58 ) Nonforfeitable dividends allocated to unvested restricted shareholders (105 ) (105 ) (101 ) (101 ) Preferred share dividends (1,725 ) (1,725 ) (1,725 ) (1,725 ) Net income attributable to common shareholders $ 44,091 $ 44,091 $ 6,710 $ 6,710 Denominator Weighted-average shares outstanding 174,788,945 174,788,945 179,562,930 179,562,930 Contingent securities/Share based compensation - 682,468 - 1,092,342 Weighted-average shares outstanding 174,788,945 175,471,413 179,562,930 180,655,272 Earnings per Common Share: Net income attributable to common shareholders $ 0.25 $ 0.25 $ 0.04 $ 0.04

Partners Equity of the Operat32

Partners Equity of the Operating Partnership (Tables)	3 Months Ended
	Mar. 31, 2016
Earnings Per Share (EPS), Basic and Diluted	The following tables detail the number of shares and net income used to calculate basic and diluted earnings per share (in thousands, except share and per share amounts; results may not add due to rounding): Three Months Ended March 31, 2016 2015 Basic Diluted Basic Diluted Numerator Income from continuing operations $ 46,310 $ 46,310 $ 8,594 $ 8,594 Net income from continuing operations attributable to non-controlling interests (389 ) (389 ) (58 ) (58 ) Nonforfeitable dividends allocated to unvested restricted shareholders (105 ) (105 ) (101 ) (101 ) Preferred share dividends (1,725 ) (1,725 ) (1,725 ) (1,725 ) Net income attributable to common shareholders $ 44,091 $ 44,091 $ 6,710 $ 6,710 Denominator Weighted-average shares outstanding 174,788,945 174,788,945 179,562,930 179,562,930 Contingent securities/Share based compensation - 682,468 - 1,092,342 Weighted-average shares outstanding 174,788,945 175,471,413 179,562,930 180,655,272 Earnings per Common Share: Net income attributable to common shareholders $ 0.25 $ 0.25 $ 0.04 $ 0.04
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Earnings Per Share (EPS), Basic and Diluted	The following tables detail the number of units and net income used to calculate basic and diluted earnings per common partnership unit (in thousands, except unit and per unit amounts; results may not add due to rounding): Three Months Ended March 31, 2016 2015 Basic Diluted Basic Diluted Numerator Income from continuing operations $ 46,310 $ 46,310 $ 8,594 $ 8,594 Nonforfeitable dividends allocated to unvested restricted unitholders (105 ) (105 ) (101 ) (101 ) Preferred unit dividends (1,725 ) (1,725 ) (1,725 ) (1,725 ) Net income attributable to non-controlling interests (2 ) (2 ) - - Net income attributable to common unitholders $ 44,478 $ 44,478 $ 6,768 $ 6,768 Denominator Weighted-average units outstanding 176,324,047 176,324,047 181,098,032 181,098,032 Contingent securities/Share based compensation - 682,468 - 1,092,342 Total weighted-average units outstanding 176,324,047 177,006,515 181,098,032 182,190,374 Earnings per Common Partnership Unit: Net income attributable to common unitholders $ 0.25 $ 0.25 $ 0.04 $ 0.04

Share Based Compensation (Table

Share Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Company's Restricted Common Share Activity	The following table summarizes the Company’s restricted common share activity during the three months ended March 31, 2016: Shares Weighted Average Grant Date Fair Value Aggregate Intrinsic Value Non-vested at January 1, 2016 506,147 $ 14.50 Granted 195,526 12.58 $ 2,448 Vested - - Forfeited (3,291 ) 14.49 Non-vested at March 31, 2016 698,382 $ 14.02 $ 9,798
Schedule of Restricted Performance Share Units Plan	The table below presents certain information as to unvested RPSU awards. RPSU Grant 3/11/2014 3/12/2014 2/23/2015 2/22/2016 Total (Amounts below in shares, unless otherwise noted) Non-vested at January 1, 2016 123,155 61,720 179,392 - 364,267 Units Granted - - - 231,388 231,388 Units Accelerated for Qualifying Retirement - - - - - Non-vested at March 31, 2016 123,155 61,720 179,392 231,388 595,655 Measurement Period Commencement Date 1/1/2014 1/1/2014 1/1/2015 1/1/2016 Measurement Period End Date 12/31/2016 12/31/2016 12/31/2017 12/31/2018 Units Granted 134,284 61,720 186,395 231,388 Fair Value of Units on Grant Date (in thousands) $ 2,624 $ 1,255 $ 3,933 $ 3,558

Segment Information (Tables)

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2016
Segment Reporting [Abstract]
Real Estate Investments, Net Operating Income and Unconsolidated Real Estate Ventures of Reportable Segments	The following tables provide selected asset information and results of operations of the Company's reportable segments (in thousands): Real estate investments, at cost: March 31, 2016 December 31, 2015 Philadelphia CBD (a) $ 1,172,188 $ 1,157,667 Pennsylvania Suburbs (b) 1,017,947 1,019,280 Metropolitan Washington, D.C. (b) 1,124,662 1,129,206 Austin, Texas 165,413 164,518 Other (b), (c) 222,983 222,329 $ 3,703,193 $ 3,693,000 Assets held for sale (a), (b) - 794,588 Operating Properties $ 3,703,193 $ 4,487,588 Corporate Construction-in-progress $ 319,656 $ 268,983 Land held for development $ 132,747 $ 130,479 (a) As of December 31, 2015, the office property located at 2970 Market Street in Philadelphia, Pennsylvania commonly known as 30 th "Real Estate Investments," (b) As of December 31, 2015, the 58 properties associated with the series of related transactions with Och-Ziff Real Estate were classified as held for sale on the consolidated balance sheets. On February 4, 2016, the Company completed the series of transactions, resulting in the disposition of the properties. See Note 3, “Real Estate Investments,” ( c ) As a result of the Och-Ziff Sale that occurred on February 4, 2016, the Company narrowed its segments to five segments located in: (1) Pennsylvania Suburbs, (2) Philadelphia Central Business District (“CBD”), (3) Metropolitan Washington, D.C. and (4) Austin, Texas. The Och-Ziff Sale disposed of the entire Richmond, Virginia segment. Subsequent to the Och-Ziff Sale, the segments previously defined as New Jersey/Delaware and California are now being managed as a consolidated segment entitled (5) “Other,” as these geographies no longer provide a significant revenue contribution. Accordingly, the chief operating decision maker revised the management structure, reallocated resources, and is assessing business operations of the five segments as of January 1, 2016. Net operating income (in thousands): Three-month periods ended March 31, 2016 2015 Total revenue Operating expenses (a) Net operating income Total revenue Operating expenses (a) Net operating income Philadelphia CBD $ 49,670 $ (19,256 ) $ 30,414 $ 52,973 $ (18,390 ) $ 34,583 Pennsylvania Suburbs 37,106 (13,155 ) 23,951 39,890 (14,585 ) 25,305 Metropolitan Washington, D.C. 27,339 (10,899 ) 16,440 27,406 (11,860 ) 15,546 Austin, Texas (b) 8,547 (3,255 ) 5,292 934 (870 ) 64 Other (c) 12,740 (7,602 ) 5,138 27,781 (14,578 ) 13,203 Corporate 1,100 (608 ) 492 1,422 (415 ) 1,007 Operating Properties $ 136,502 $ (54,775 ) $ 81,727 $ 150,406 $ (60,698 ) $ 89,708 (a) Includes property operating expense, real estate taxes and third party management expense. (b) On June 22, 2015 the Company acquired the remaining 50.0% interest in Broadmoor Austin Associates. As such, the Company has seven wholly owned properties in its Austin, Texas business segment at March 31, 2016. In addition, net operating income for the three months ended March 31, 2016 and 2015 includes management fees and related expenses for services provided by the Company to the Austin Venture (c) See footnote (c) at the “Real estate investments, at cost” table above for further information regarding this segment. Unconsolidated real estate ventures (in thousands): Investment in real estate ventures, at equity Equity in income (loss) of real estate ventures As of Three Months Ended March 31, March 31, 2016 December 31, 2015 2016 2015 Philadelphia CBD (a) $ 57,477 $ 44,089 $ 455 $ (300 ) Pennsylvania Suburbs 16,737 16,408 265 (6 ) Metropolitan Washington, D.C. 119,713 118,422 (448 ) (50 ) MAP Venture (b) 24,554 - (556 ) - Other (c) 1,551 1,657 161 134 Austin, Texas (d) 58,627 60,428 (280 ) 353 Total $ 278,659 $ 241,004 $ (403 ) $ 131 (a) Investment in real estate ventures increased by $12.8 million as a result of the Company’s cash payment to evo at Cira to purchase Campus Crest’s entire 30% interest in evo at Cira and, as a result, each of the Company and HSRE owns a 50% interest in evo at Cira. See Note 4, “ Investment in Unconsolidated Real Estate Ventures, (b) The MAP Venture represents a joint venture formed between the Company and MAP Ground Lease Holdings LLC, an affiliate of Och-Ziff Capital Management Group, LLC, on February 4, 2016. See Note 4 “ Investment in Unconsolidated Real Estate Ventures, (c) See footnote (c) at the “Real estate investments, at cost” table above for further information regarding this segment. (d) Investment in real estate ventures does not include the $1.1 million negative investment balance in one real estate venture as of December 31, 2015, which is included in other liabilities. The Company disposed of its interest in this venture during the first quarter of 2016. See Note 4, " Investment in Unconsolidated Real Estate Ventures
Reconciliation of Consolidated NOI to Consolidated Net Income	The following is a reconciliation of consolidated NOI to consolidated net income, as defined by GAAP (in thousands): Three Months Ended March 31, 2016 2015 Consolidated net operating income $ 81,727 $ 89,708 Less: Interest expense (23,691 ) (28,176 ) Interest expense - amortization of deferred financing costs (774 ) (1,079 ) Interest expense - financing obligation (281 ) (286 ) Depreciation and amortization (48,873 ) (51,111 ) General and administrative expenses (9,120 ) (8,636 ) Equity in income (loss) of real estate ventures (403 ) 131 Provision for impairment (7,390 ) (1,726 ) Loss on early extinguishment of debt (66,590 ) - Plus: Interest income 320 750 Net gain on disposition of real estate 115,456 9,019 Net gain on real estate venture transactions 5,929 - Net income $ 46,310 $ 8,594

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2016
Commitments And Contingencies Disclosure [Abstract]
Minimum Future Rental Payments on Non-cancelable Leases	Minimum future rental payments on non-cancelable leases at March 31, 2016 are as follows (in thousands Year Minimum Rent 2016 (nine months remaining) $ 995 2017 1,327 2018 1,327 2019 1,327 2020 1,327 Thereafter 67,269 Total $ 73,572

Organization of The Parent Co36

Organization of The Parent Company and The Operating Partnership (Textual) (Details)	Mar. 31, 2016ft²apropertyReal_Estate_Investmentsreal_estate_ventureBuildingApartment_unit	Feb. 04, 2016property
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of Properties	121
Office Properties [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of Properties	106
Rentable Square Feet | ft²	4,787,475
Industrial Properties [Member] | MAP Venture [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of Properties	6	20
Nine Real Estate Ventures [Member] | Office Properties [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of Properties | Building	88
Number of unconsolidated investments in Real Estate Ventures | real_estate_venture	9
Rentable Square Feet | ft²	8,100,000
Mixed Use Properties [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of Properties	9
Retail Properties [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of Properties	1
Core Properties [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of Properties	116
Development Property [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of Properties	3
Redevelopment Property [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of Properties	1
Re-entitlement Property [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of Properties	1
Undeveloped Land [Member] | Two Real Estate Ventures [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of unconsolidated investments in Real Estate Ventures | real_estate_venture	2
Acreage of land | a	4.3
Under Active Development Land [Member] | Three Real Estate Ventures [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of unconsolidated investments in Real Estate Ventures | real_estate_venture	3
Acreage of land | a	2.2
Residential Tower [Member] | One Real Estate Ventures [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of unconsolidated investments in Real Estate Ventures | real_estate_venture	1
Number of Property units | Apartment_unit	345
Apartment Complex [Member] | One Other Real Estate Ventures [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of unconsolidated investments in Real Estate Ventures | real_estate_venture	1
Number of Property units | Apartment_unit	398
Parent Company [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Ownership in the Operating Partnership	99.10%
Net Rentable Square Feet | ft²	18,200,000
Area Owned by Company of Undeveloped Parcels of Land | a	292
Area of Additional Undeveloped Parcels of Land With Option to Purchase | a	50
Total Potential Development Capacity | ft²	6,400,000
Unconsolidated Real Estate Ventures [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of Unconsolidated Real Estate Ventures | Real_Estate_Investments	16
Unconsolidated Real Estate Ventures [Member] | Nine Real Estate Ventures [Member] | Office Properties [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of unconsolidated investments in Real Estate Ventures | Real_Estate_Investments	9
Rentable Square Feet | ft²	8,100,000
Unconsolidated Real Estate Ventures [Member] | Undeveloped Land [Member] | Two Real Estate Ventures [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of unconsolidated investments in Real Estate Ventures | Real_Estate_Investments	2
Acreage of land | a	4.3
Unconsolidated Real Estate Ventures [Member] | Under Active Development Land [Member] | Three Real Estate Ventures [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of unconsolidated investments in Real Estate Ventures | Real_Estate_Investments	3
Acreage of land | a	2.2
Unconsolidated Real Estate Ventures [Member] | Residential Tower [Member] | One Real Estate Ventures [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of unconsolidated investments in Real Estate Ventures | Real_Estate_Investments	1
Number of Property units	345
Unconsolidated Real Estate Ventures [Member] | Apartment Complex [Member] | One Other Real Estate Ventures [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of unconsolidated investments in Real Estate Ventures | Real_Estate_Investments	1
Number of Property units	398
Wholly-owned Management Company Subsidiaries [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Net Rentable Square Feet | ft²	29,300,000
Wholly-owned Management Company Subsidiaries [Member] | Partially Owned Properties [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Net Rentable Square Feet | ft²	11,100,000
Wholly-owned Management Company Subsidiaries [Member] | Wholly Owned Properties [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Net Rentable Square Feet | ft²	18,200,000
Wholly-owned Management Company Subsidiaries [Member] | Office and Industrial Properties [Member] | Partially Owned Properties [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Net Rentable Square Feet | ft²	11,100,000

Real Estate Investments - Gross

Real Estate Investments - Gross Carrying Value of Properties (Details) - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment, Gross [Abstract]
Land		$ 511,977	$ 513,268
Tenant improvements		467,778	459,952
Real Estate Investments, and Building and improvements		3,703,193	3,693,000
Assets held for sale - real estate investments	[1],[2],[3]	0	794,588
Total		3,703,193	4,487,588
Building and Improvements [Member]
Property, Plant and Equipment, Gross [Abstract]
Real Estate Investments, and Building and improvements		$ 2,723,438	$ 2,719,780
[1]	As of December 31, 2015, the 58 properties associated with the series of related transactions with Och-Ziff Real Estate were classified as held for sale on the consolidated balance sheets. On February 4, 2016, the Company completed the series of transactions, resulting in the disposition of the properties. See Note 3, “Real Estate Investments,” for further information regarding the disposition. The sale is not classified as a significant disposition under the accounting guidance for discontinued operations.
[2]	As of December 31, 2015, the office property located at 2970 Market Street in Philadelphia, Pennsylvania commonly known as 30th Street Main Post Office (“Cira Square”) was classified as held for sale on the consolidated balance sheets. The Company disposed of its interests in the property on February 5, 2016. See Note 3, "Real Estate Investments," for further information. The sale is not classified as a significant disposition under the accounting guidance for discontinued operations.
[3]	Real estate investments related to assets held for sale above represents gross real estate assets and does not include accumulated depreciation or intangible assets on the balance sheets of the properties held for sale.

Real Estate Investments - Summa

Real Estate Investments - Summary of Office Properties Sold (Details) $ in Thousands		Feb. 04, 2016property	Mar. 31, 2016USD ($)ft²property		Mar. 31, 2015USD ($)
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Net Proceeds on Sale			$ 704,911		$ 26,778
Gain (Loss) on Sale			$ 115,456		$ 9,019
Office Building [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of Properties Sold | property			59
Rentable Square Feet | ft²			4,787,475
Sales Price			$ 752,100
Net Proceeds on Sale			704,121
Gain (Loss) on Sale	[1]		$ 115,456
Office Building [Member] | 2970 Market Street (Cira Square) [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of Properties Sold | property			1
Rentable Square Feet | ft²			862,692
Sales Price			$ 354,000
Net Proceeds on Sale			350,150
Gain (Loss) on Sale	[1]		$ 115,828
Office Building [Member] | Och Ziff Portfolio [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of Properties Sold | property		58	58	[2]
Rentable Square Feet | ft²	[2]		3,924,783
Sales Price	[2]		$ 398,100
Net Proceeds on Sale	[2]		353,971
Gain (Loss) on Sale	[1],[2],[3]		$ (372)
[1]	Gain/(Loss) on Sale is net of closing and other transaction related costs.
[2]	Exhibit 99.2 to Form 8-K filed on February 10, 2016 contains a complete list of the 58 properties. See also Note 4, "Investment in Unconsolidated Real Estate Ventures," for further details of the transactions.
[3]	During the fourth quarter of 2015, the Company recognized an impairment loss totaling approximately $45.4 million on the properties. The loss on sale represents additional closing costs that were not known at settlement.

Real Estate Investments - Sum39

Real Estate Investments - Summary of Office Properties Sold (Parenthetical) (Details) - Office Properties [Member] $ in Millions	Feb. 04, 2016property	Mar. 31, 2016property		Dec. 31, 2015USD ($)
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of Properties Sold		59
Och Ziff Portfolio [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of Properties Sold	58	58	[1]
Provision for impairment on assets held for sale | $				$ 45.4
[1]	Exhibit 99.2 to Form 8-K filed on February 10, 2016 contains a complete list of the 58 properties. See also Note 4, "Investment in Unconsolidated Real Estate Ventures," for further details of the transactions.

Real Estate Investments - Dispo

Real Estate Investments - Dispositions (Textual) (Details)	3 Months Ended
	Mar. 31, 2016USD ($)property	Dec. 31, 2015USD ($)	Mar. 31, 2015USD ($)	Jan. 15, 2015USD ($)Parcel
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gain (Loss) on Sale	$ 115,456,000		$ 9,019,000
Number of Properties | property	121
Pennsylvania Suburbs [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of Parcels | Parcel				120
Sales Price				$ 900,000
Provision for impairment on assets held for sale		$ 300,000
Gain (Loss) on Sale	$ 0
Metropolitan DC [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of Properties | property	2
Impairment of properties held for use	$ 7,400,000
Carrying value of real estate prior to impairment	51,900,000
Aggregate carrying value	$ 44,500,000
Impairment Hold Period	10 years
Residual Capitalization Rates	7.00%
Discount Rates	7.00%

Investment in Unconsolidated 41

Investment in Unconsolidated Real Estate Ventures (Textual) (Details)		Mar. 02, 2016USD ($)	Feb. 04, 2016USD ($)ft²property	Jan. 29, 2016USD ($)	Mar. 31, 2016USD ($)ft²apropertyreal_estate_ventureBuildingApartment_unit	Mar. 31, 2015USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Sep. 30, 2014aStoreyBed	Jan. 25, 2013USD ($)a
Schedule Of Equity Method Investments [Line Items]
Number of unconsolidated investments in Real Estate Ventures | real_estate_venture					16
Equity Method Investments including net liabilities					$ 278,700,000
Number of Properties | property					121
Management fees					$ 5,235,000	$ 3,872,000
Accounts receivable					14,027,000		$ 17,126,000
Company's share of equity (Company's basis)					278,659,000		241,004,000
Proceeds from the sale of properties					704,911,000	26,778,000
Proceeds from sale of real estate venture					4,812,000	0
Gain (Loss) on Sale					115,456,000	9,019,000
TB-BDN Plymouth Apartments [Member]
Schedule Of Equity Method Investments [Line Items]
Construction Loan					56,000,000
Guarantor obligations, current carrying value					3,200,000
1919 Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Guarantor obligations, current carrying value					88,900,000
Unconsolidated Real Estate Ventures [Member]
Schedule Of Equity Method Investments [Line Items]
Company's share of equity (Company's basis)	[1],[2]				$ 278,659,000		241,004,000
Unconsolidated Real Estate Ventures [Member] | Minimum [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method investment percentage					20.00%
Unconsolidated Real Estate Ventures [Member] | Maximum [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method investment percentage					70.00%
evo at Cira Centre South Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Construction Loan					$ 97,800,000
Guarantor obligations, current carrying value					26,500,000
evo at Cira Centre South Venture [Member] | Construction Financing [Member]
Schedule Of Equity Method Investments [Line Items]
Guarantor obligations, maximum payment							24,700,000
evo at Cira Centre South Venture [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method investment percentage		50.00%								30.00%
Equity Method Investment, Underlying Equity in Net Assets										$ 8,500,000
Area of developed parcels of land (in acres) owned by a Real Estate Venture | a									1	1
Number of floors of a building | Storey									33
Student housing bed capacity | Bed									850
Percent of share of contribution made on real estate venture								100.00%
Construction Loan								$ 97,800,000
Cash paid to acquire real estate ventures		$ 12,800,000
Equity method investment percentage of interests acquired by the Company and HSRE		30.00%
Company's share of equity (Company's basis)		$ 28,300,000
evo at Cira Centre South Venture [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] | Construction Financing [Member]
Schedule Of Equity Method Investments [Line Items]
Guarantor obligations, maximum payment		$ 26,500,000
evo at Cira Centre South Venture [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] | Campus Crest Properties, LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method investment percentage										30.00%
evo at Cira Centre South Venture [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] | HSRE, LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method investment percentage		50.00%								40.00%
Cash paid to acquire real estate ventures		$ 6,600,000
MAP Venture [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Schedule Of Equity Method Investments [Line Items]
Rentable Square Feet | ft²			3,924,783
Equity method investment percentage			50.00%
Number of Properties Sold | property			58
Sales Price			$ 398,100,000
Percentage of fee interests in land sold			100.00%
Ground lease annual payments					$ 11,900,000
Ground lease annual rent expense increase percentage					2.50%
Reassessment period for change in ground lease annual payments					10 years
Ground Lease Terms					Annual payments by the MAP Venture, as tenant under the Ground Leases, initially total $11.9 million and increase 2.5% annually through November 2025
Non-Recourse Debt			$ 180,800,000
Proceeds from the sale of properties			354,000,000
Ownership percentage value			$ 25,200,000
Coppell Associates [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method investment percentage				50.00%
Proceeds from sale of real estate venture				$ 4,600,000
Gain (Loss) on Sale				5,700,000
Coppell Associates [Member] | Other Liabilities [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method investment percentage					50.00%
Company's share of equity (Company's basis)				$ 1,100,000
PJP VII [Member]
Schedule Of Equity Method Investments [Line Items]
Guarantor obligations, current carrying value					$ 500,000
Office Properties [Member]
Schedule Of Equity Method Investments [Line Items]
Number of Properties | property					106
Rentable Square Feet | ft²					4,787,475
Number of Properties Sold | property					59
Sales Price					$ 752,100,000
Proceeds from the sale of properties					704,121,000
Gain (Loss) on Sale	[3]				$ 115,456,000
Nine Real Estate Ventures [Member] | Office Properties [Member]
Schedule Of Equity Method Investments [Line Items]
Number of unconsolidated investments in Real Estate Ventures | real_estate_venture					9
Number of Properties | Building					88
Rentable Square Feet | ft²					8,100,000
Two Real Estate Ventures [Member] | Undeveloped Land [Member]
Schedule Of Equity Method Investments [Line Items]
Number of unconsolidated investments in Real Estate Ventures | real_estate_venture					2
Acreage of land | a					4.3
Three Real Estate Ventures [Member] | Under Active Development Land [Member]
Schedule Of Equity Method Investments [Line Items]
Number of unconsolidated investments in Real Estate Ventures | real_estate_venture					3
Acreage of land | a					2.2
One Real Estate Ventures [Member] | Residential Tower [Member]
Schedule Of Equity Method Investments [Line Items]
Number of unconsolidated investments in Real Estate Ventures | real_estate_venture					1
Number of Property units | Apartment_unit					345
One Other Real Estate Ventures [Member] | Apartment Complex [Member]
Schedule Of Equity Method Investments [Line Items]
Number of unconsolidated investments in Real Estate Ventures | real_estate_venture					1
Number of Property units | Apartment_unit					398
Real Estate Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Management fees					$ 1,500,000	$ 1,200,000
Accounts receivable					$ 1,300,000		$ 1,700,000
[1]	Does not include the negative investment balance in one real estate venture totaling $1.1 million as of December 31, 2015, which is included in other liabilities. There is no negative investment balance as of March 31, 2016 because the Company sold its entire remaining 50% interest in the applicable real estate venture (See “Coppell Associates” section below) during the three months ended March 31, 2016.
[2]	This amount includes 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.
[3]	Gain/(Loss) on Sale is net of closing and other transaction related costs.

Investment in Unconsolidated 42

Investment in Unconsolidated Real Estate Ventures - Summary of Financial Position of Real Estate Ventures (Details) - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015
Schedule Of Equity Method Investments [Line Items]
Company's share of equity (Company's basis)		$ 278,659	$ 241,004
Unconsolidated Real Estate Ventures [Member]
Schedule Of Equity Method Investments [Line Items]
Net property		1,483,966	1,258,999
Other assets		237,710	158,672
Other liabilities		155,678	68,028
Debt, net		981,126	794,571
Equity		584,872	554,072
Company's share of equity (Company's basis)	[1],[2]	$ 278,659	$ 241,004
[1]	Does not include the negative investment balance in one real estate venture totaling $1.1 million as of December 31, 2015, which is included in other liabilities. There is no negative investment balance as of March 31, 2016 because the Company sold its entire remaining 50% interest in the applicable real estate venture (See “Coppell Associates” section below) during the three months ended March 31, 2016.
[2]	This amount includes 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 Unconsolidated 43

Investment in Unconsolidated Real Estate Ventures - Summary of Financial Position of Real Estate Ventures (Parenthetical) (Details) - Coppell Associates [Member] - USD ($) $ in Millions	Mar. 31, 2016	Jan. 29, 2016	Dec. 31, 2015
Schedule Of Equity Method Investments [Line Items]
Equity method investment percentage		50.00%
Other Liabilities [Member]
Schedule Of Equity Method Investments [Line Items]
Negative investment balance	$ 0		$ 1.1
Equity method investment percentage	50.00%

Investment in Unconsolidated 44

Investment in Unconsolidated Real Estate Ventures - Summary of Results of Operations of Real Estate Ventures with Interests (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Schedule Of Equity Method Investments [Line Items]
Company’s share of income (loss) (Company’s basis)		$ (403)	$ 131
Unconsolidated Real Estate Ventures [Member]
Schedule Of Equity Method Investments [Line Items]
Revenue		46,525	46,109
Operating expenses		(26,668)	(18,533)
Interest expense, net		(8,989)	(9,846)
Depreciation and amortization		(20,160)	(19,124)
Net loss	[1]	(9,292)	(1,394)
Company’s share of income (loss) (Company’s basis)		$ (403)	$ 131
[1]	This amount includes $6.4 million of acquisition deal costs related to the formation of the MAP Venture during the first quarter of 2016.

Investment in Unconsolidated 45

Investment in Unconsolidated Real Estate Ventures - Summary of Results of Operations of Real Estate Ventures with Interests (Parenthetical) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)
MAP Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Acquisition deal costs	$ 6.4

Intangible Assets and Liabili46

Intangible Assets and Liabilities - Intangible Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Intangible Assets [Line Items]
Intangible Assets, Total Cost	$ 174,040	$ 183,872
Intangible Assets, Accumulated Amortization	(73,977)	(72,249)
Intangible Assets, net	100,063	111,623
Acquired Lease Intangibles, Gross	45,826	48,956
Acquired Lease Intangibles, Accumulated Amortization	(22,578)	(23,301)
Acquired Lease Intangibles, Net	23,248	25,655
Below market leases [Member]
Intangible Assets [Line Items]
Acquired Lease Intangibles, Gross		50,025
Acquired Lease Intangibles, Accumulated Amortization		(24,178)
Acquired Lease Intangibles, Net		25,847
Liabilities of assets held for sale [Member]
Intangible Assets [Line Items]
Acquired Lease Intangibles, Gross		1,069
Acquired Lease Intangibles, Accumulated Amortization		(877)
Acquired Lease Intangibles, Net		192
In-place lease value [Member]
Intangible Assets [Line Items]
Intangible Assets, Total Cost	149,980	161,276
Intangible Assets, Accumulated Amortization	(57,030)	(57,063)
Intangible Assets, net	92,950	104,213
Tenant relationship value [Member]
Intangible Assets [Line Items]
Intangible Assets, Total Cost	18,900	20,117
Intangible Assets, Accumulated Amortization	(15,000)	(15,580)
Intangible Assets, net	3,900	4,537
Above market leases acquired [Member]
Intangible Assets [Line Items]
Intangible Assets, Total Cost	5,160	5,333
Intangible Assets, Accumulated Amortization	(1,947)	(1,879)
Intangible Assets, net	$ 3,213	3,454
Intangible assets including assets held for sale [Member]
Intangible Assets [Line Items]
Intangible Assets, Total Cost		186,726
Intangible Assets, Accumulated Amortization		(74,522)
Intangible Assets, net		112,204
Assets held for sale [Member]
Intangible Assets [Line Items]
Intangible Assets, Total Cost		2,854
Intangible Assets, Accumulated Amortization		(2,273)
Intangible Assets, net		$ 581

Intangible Assets and Liabili47

Intangible Assets and Liabilities - Annual Amortization of Intangible Assets, Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Assets
2016 (nine months remaining)	$ 26,791
2,017	20,012
2,018	11,853
2,019	10,609
2,020	8,513
Thereafter	22,285
Intangible Assets, net	100,063	$ 111,623
Liabilities
2016 (nine months remaining)	5,092
2,017	3,356
2,018	2,201
2,019	1,885
2,020	1,337
Thereafter	9,377
Acquired Lease Intangibles, Net	$ 23,248	$ 25,655

Debt Obligations (Textual) (Det

Debt Obligations (Textual) (Details)	Jan. 14, 2016USD ($)ft²	Mar. 31, 2016USD ($)	Mar. 31, 2015USD ($)	Dec. 31, 2015USD ($)
Debt Instrument [Line Items]
Loss on early extinguishment of debt - deferred financing costs		$ 13,157,000	$ 0
Loss on early extinguishment of debt	$ (66,590,000)	(66,590,000)	$ 0
Unsecured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Principal repayments of debt	195,000,000
Secured Debt [Member]
Debt Instrument [Line Items]
Mortgage debt principal payment		$ 1,600,000
Long-term Debt, Weighted Average Interest Rate		4.93%		5.72%
Long-term Debt, Gross		$ 348,900,000		$ 562,700,000
Secured Debt [Member] | Cira Square and Cira South Garage [Member]
Debt Instrument [Line Items]
Repayments of debt	265,800,000
Secured Debt [Member] | Cira Square [Member]
Debt Instrument [Line Items]
Principal repayments of debt	176,900,000
Repayment of prepayment charges	$ 44,500,000
Debt instrument maturity date	Sep. 10, 2030
Loss on early extinguishment of debt - deferred financing costs	$ 10,800,000
Secured Debt [Member] | Cira South Garage [Member]
Debt Instrument [Line Items]
Repayments of debt	44,400,000
Principal repayments of debt	35,500,000
Repayment of prepayment charges	$ 8,900,000
Debt instrument maturity date	Sep. 10, 2030
Number of Parking Spaces | ft²	1,662
Loss on early extinguishment of debt - deferred financing costs	$ 2,400,000
Secured Debt [Member] | Unsecured Line Of Credit
Debt Instrument [Line Items]
Line of credit		$ 0

Fair Value of Financial Instr49

Fair Value of Financial Instruments - Financial Instruments for which Estimates of Fair Value Differ from Carrying Amounts (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Mortgage notes payable, net	$ 345,310	$ 545,753
Carrying Amount [Member] | Unsecured Notes Payable [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Unsecured notes payable	1,513,146	1,512,554
Carrying Amount [Member] | Variable Rate Debt [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Variable rate debt	326,492	326,410
Carrying Amount [Member] | Mortgages Notes Payable [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Mortgage notes payable, net	345,310	545,753
Fair Value [Member] | Unsecured Notes Payable [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt instrument, fair value	1,532,494	1,529,346
Fair Value [Member] | Variable Rate Debt [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt instrument, fair value	305,251	305,522
Fair Value [Member] | Mortgages Notes Payable [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt instrument, fair value	$ 354,125	$ 597,377

Fair Value of Financial Instr50

Fair Value of Financial Instruments (Textual) (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Variable rate and mortgage debt [Member]
Fair Value Inputs Liabilities Quantitative Information [Line Items]
Discount Rates	4.541%	4.55%

Limited Partners' Non-Control51

Limited Partners' Non-Controlling Interests in the Parent Company (Textual) (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Noncontrolling Interest [Abstract]
Aggregate amount related to non-controlling interests classified within equity	$ 16.2	$ 16.1
Settlement value of non controlling interest in operating partnership	$ 21.5	$ 21

Fair Value of Derivative Fina52

Fair Value of Derivative Financial Instruments - Terms and Fair Values of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Derivatives Fair Value [Line Items]
Notional Amount	$ 328,610	$ 328,610
Interest Rate Swap [Member] | Cash Flow Hedging [Member] | 3.718% Interest Rate Swap Maturing October 8, 2022 [Member]
Derivatives Fair Value [Line Items]
Notional Amount	$ 250,000	250,000
Derivative, Fixed Interest Rate	3.718%
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	$ (6,369)
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		1,884
Interest Rate Swap [Member] | Cash Flow Hedging [Member] | 3.300% Interest Rate Swap Maturing January 30, 2021 [Member]
Derivatives Fair Value [Line Items]
Notional Amount	$ 25,774	25,774
Derivative, Fixed Interest Rate	3.30%
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	$ (1,162)	(531)
Interest Rate Swap [Member] | Cash Flow Hedging [Member] | 3.090% Interest Rate Swap Maturing October 30, 2019 [Member]
Derivatives Fair Value [Line Items]
Notional Amount	$ 25,774	25,774
Derivative, Fixed Interest Rate	3.09%
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	$ (819)	(388)
Interest Rate Swap [Member] | Cash Flow Hedging [Member] | 2.750% Interest Rate Swap Maturing September 30, 2017 [Member]
Derivatives Fair Value [Line Items]
Notional Amount	$ 27,062	27,062
Derivative, Fixed Interest Rate	2.75%
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	$ (290)	$ (201)

Beneficiaries Equity of the P53

Beneficiaries Equity of the Parent Company - Number of Shares and Net Income Used to Calculate Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Numerator
Income from continuing operations	$ 46,310	$ 8,594
Net income from continuing operations attributable to non-controlling interests	(389)	(58)
Nonforfeitable dividends allocated to unvested restricted shareholders	(105)	(101)
Distribution to preferred shareholders	(1,725)	(1,725)
Net income attributable to Common Share/Unit holders of entity	44,091	6,710
Net income attributable to common share/unit holders, Diluted	$ 44,091	$ 6,710
Denominator
Basic weighted average shares outstanding (in shares)	174,788,945	179,562,930
Contingent securities/Share based compensation (in shares)	682,468	1,092,342
Diluted weighted average shares outstanding (in shares)	175,471,413	180,655,272
Earnings per Common Share:
Net income attributable to common shareholders, Basic (USD per share)	$ 0.25	$ 0.04
Net income attributable to common shareholders, Diluted (USD per share)	$ 0.25	$ 0.04

Beneficiaries Equity of the P54

Beneficiaries Equity of the Parent Company (Textual) (Details) - USD ($)	Mar. 09, 2016	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Jul. 22, 2015	Nov. 05, 2013
Class of Stock [Line Items]
Distributions payable		$ 28,295,000		$ 28,249,000
Preferred Stock, Dividend Rate, Percentage		6.90%		6.90%
Dividends, Preferred Stock		$ 1,725,000	$ 1,725,000
Shares Authorized For Equity Offering Program						16,000,000
Authorized Amount					$ 100,000,000
Number of Shares Authorized to be Repurchased					539,200
Repurchased and Retired, Shares		5,209,437
Share Price		$ 12.90
Repurchased and Retired, Value		$ 67,300,000
Shares repurchased		0	0
Common shares price per share		$ 0.01		$ 0.01
Series E Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage		6.90%
Preferred Stock, Liquidation Preference Per Share		$ 25
Offering Program [Member]
Class of Stock [Line Items]
Remaining Shares Available For Sales		16,000,000
Offering Program [Member] | Maximum [Member]
Class of Stock [Line Items]
Fees and Commissions Percentage		2.00%
Dividend Declared [Member]
Class of Stock [Line Items]
Dividends Payable, Amount Per Share	$ 0.15
Dividend Paid [Member]
Class of Stock [Line Items]
Distributions payable		$ 26,600,000
Dividend Paid [Member] | Series E Preferred Stock [Member]
Class of Stock [Line Items]
Dividends, Preferred Stock	$ 1,700,000
Redeemable Common Limited Partnership Units
Class of Stock [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share		1,535,102	1,535,102

Partners Equity of the Operat55

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
	Mar. 31, 2016	Mar. 31, 2015
Numerator
Income from continuing operations	$ 46,310	$ 8,594
Nonforfeitable dividends allocated to unvested restricted shareholders	(105)	(101)
Distribution to preferred shareholders	(1,725)	(1,725)
Net income attributable to Common Share/Unit holders of entity	44,091	6,710
Net income attributable to common share/unit holders, Diluted	$ 44,091	$ 6,710
Denominator
Basic weighted average shares outstanding (in shares)	174,788,945	179,562,930
Contingent securities/Share based compensation (in shares)	682,468	1,092,342
Diluted weighted average shares outstanding (in shares)	175,471,413	180,655,272
Earnings per Common Partnership Unit:
Net income attributable to common shareholders, Basic (USD per share)	$ 0.25	$ 0.04
Net income attributable to common shareholders, Diluted (USD per share)	$ 0.25	$ 0.04
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Numerator
Income from continuing operations	$ 46,310	$ 8,594
Nonforfeitable dividends allocated to unvested restricted shareholders	(105)	(101)
Distribution to preferred shareholders	(1,725)	(1,725)
Net income attributable to non-controlling interests	(2)	0
Net income attributable to Common Share/Unit holders of entity	44,478	6,768
Net income attributable to common share/unit holders, Diluted	$ 44,478	$ 6,768
Denominator
Basic weighted average shares outstanding (in shares)	176,324,047	181,098,032
Contingent securities/Share based compensation (in shares)	682,468	1,092,342
Diluted weighted average shares outstanding (in shares)	177,006,515	182,190,374
Earnings per Common Partnership Unit:
Net income attributable to common shareholders, Basic (USD per share)	$ 0.25	$ 0.04
Net income attributable to common shareholders, Diluted (USD per share)	$ 0.25	$ 0.04

Partners Equity of the Operat56

Partners Equity of the Operating Partnership (Textual) (Details) - USD ($) $ / shares in Units, $ in Thousands	Mar. 09, 2016	Mar. 31, 2016	Dec. 31, 2015
Class of Stock [Line Items]
Distributions payable		$ 28,295	$ 28,249
Preferred Stock, Dividend Rate, Percentage		6.90%	6.90%
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Class of Stock [Line Items]
Distributions payable		$ 28,295	$ 28,249
Preferred Stock, Dividend Rate, Percentage		6.90%	6.90%
Dividend Declared [Member]
Class of Stock [Line Items]
Dividends Payable, Amount Per Share	$ 0.15
Dividend Declared [Member] | BRANDYWINE OPERATING PARTNERSHIP, L.P.
Class of Stock [Line Items]
Dividends Payable, Amount Per Share	$ 0.15
Dividend Paid [Member]
Class of Stock [Line Items]
Distributions payable		$ 26,600
Dividend Paid [Member] | BRANDYWINE OPERATING PARTNERSHIP, L.P.
Class of Stock [Line Items]
Distributions payable		$ 26,600
6.90% Series E-linked Preferred Units [Member] | BRANDYWINE OPERATING PARTNERSHIP, L.P.
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage		6.90%
Preferred Stock, Liquidation Preference Per Share		$ 25
6.90% Series E-linked Preferred Units [Member] | Dividend Paid [Member] | BRANDYWINE OPERATING PARTNERSHIP, L.P.
Class of Stock [Line Items]
Dividends, Preferred Stock, Cash	$ 1,700

Share Based Compensation (Textu

Share Based Compensation (Textual) (Details) $ / shares in Units, $ in Millions	Mar. 08, 2016Installmentshares	Feb. 22, 2016shares	Feb. 01, 2016shares	Mar. 31, 2016USD ($)shares	Mar. 31, 2015USD ($)	Feb. 05, 2016$ / shares	Dec. 31, 2015shares
Restricted Common Share Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number				698,382			506,147
Vesting period				3 years
Unrecognized compensation expenses | $				$ 3
Weighted average period over which options will be recognized				1 year 6 months
Stock-based compensation expense | $				$ 1.2	$ 1.3
Stock-based compensation expense, capitalized | $				$ 0.3	0.3
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights				three years from the initial grant dates
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period				195,526
Voluntary Termination Of Employment Terms				after reaching at least age 57 and accumulating at least 15 years of service with the Company
Accumulated Service Period For Voluntary Termination				15 years
Restricted Common Share Awards [Member] | Executive Officer [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Voluntary Termination of Employment Age Limit				57 years
Restricted Common Share Awards [Member] | Non-Officer Employees [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	54,168
Number of Vesting Installments | Installment	3
Restricted Common Share Awards [Member] | Cliff Vest [Member] | Executive Officer [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		141,358
Share Based Compensation Arrangement By Share Based Payment Award, Vesting Date		Apr. 15, 2019
Restricted Common Share Awards [Member] | Installment One [Member] | Non-Officer Employees [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award, Vesting Date	Apr. 15, 2017
Restricted Common Share Awards [Member] | Installment Two [Member] | Non-Officer Employees [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award, Vesting Date	Apr. 15, 2018
Restricted Common Share Awards [Member] | Installment Three [Member] | Non-Officer Employees [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award, Vesting Date	Apr. 15, 2019
Restricted Performance Share Units Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation expenses | $				$ 2.6
Weighted average period over which options will be recognized				1 year 9 months 18 days
Stock-based compensation expense | $				$ 1.7	2.4
Stock-based compensation expense, capitalized | $				$ 0.5	$ 0.5
Common shares issued for share based compensation			156,415
Vesting Period, Minimum				3 year
Dividends Payable, Amount Per Share | $ / shares						$ 0.15
Restricted Performance Share Units Plan [Member] | Executive Officer [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number				595,655			364,267
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period				231,388
Restricted Performance Share Units Plan [Member] | Cliff Vest [Member] | Executive Officer [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights				three year cliff vesting period

Share Based Compensation - Rest

Share Based Compensation - Restricted Common Share Activity (Details) - Restricted Common Share Awards [Member]	3 Months Ended
	Mar. 31, 2016USD ($)$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non-vested at January 1, 2016, shares | shares	506,147
Granted, shares | shares	195,526
Vested, shares | shares	0
Forfeited, shares | shares	(3,291)
Non-vested at March 31, 2016, shares | shares	698,382
Non-vested at January 1, 2016, Weighted Average Grant Date Fair Value | $ / shares	$ 14.50
Granted, Weighted Average Grant Date Fair Value | $ / shares	12.58
Vested, Weighted Average Grant Date Fair Value | $ / shares	0
Forfeited, Weighted Average Grant Date Fair Value | $ / shares	14.49
Non-vested at March 31, 2016, Weighted Average Grant Date Fair Value | $ / shares	$ 14.02
Non-vested at January 1, 2016, Aggregate Intrinsic Value | $	$ 0
Granted, Aggregate Intrinsic Value | $	2,448
Vested, Aggregate Intrinsic Value | $	0
Non-vested at March 31, 2016, Aggregate Intrinsic Value | $	$ 9,798

Share Based Compensation - Re59

Share Based Compensation - Restricted Performance Share Units (Details) - Executive Officer [Member] - Restricted Performance Share Units Plan [Member] - USD ($) $ in Thousands	Feb. 22, 2016	Feb. 23, 2015	Mar. 12, 2014	Mar. 11, 2014	Mar. 31, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non-vested at January 1, 2016, shares					364,267
Granted, shares					231,388
Units Accelerated for Qualifying Retirement					0
Non-vested at March 31, 2016, shares					595,655
Units Granted	231,388	186,395	61,720	134,284
Fair Value of Units on Grant Date (in thousands)	$ 3,558	$ 3,933	$ 1,255	$ 2,624
March 11, 2014 RSPU Grant [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non-vested at January 1, 2016, shares					123,155
Granted, shares					0
Units Accelerated for Qualifying Retirement					0
Non-vested at March 31, 2016, shares					123,155
Measurement Period Commencement Date					Jan. 1, 2014
Measurement Period End Date					Dec. 31, 2016
March 12, 2014 RSPU Grant [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non-vested at January 1, 2016, shares					61,720
Granted, shares					0
Units Accelerated for Qualifying Retirement					0
Non-vested at March 31, 2016, shares					61,720
Measurement Period Commencement Date					Jan. 1, 2014
Measurement Period End Date					Dec. 31, 2016
February 23, 2015 RSPU Grant [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non-vested at January 1, 2016, shares					179,392
Granted, shares					0
Units Accelerated for Qualifying Retirement					0
Non-vested at March 31, 2016, shares					179,392
Measurement Period Commencement Date					Jan. 1, 2015
Measurement Period End Date					Dec. 31, 2017
February 22, 2016 RSPU Grant [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non-vested at January 1, 2016, shares					0
Granted, shares					231,388
Units Accelerated for Qualifying Retirement					0
Non-vested at March 31, 2016, shares					231,388
Measurement Period Commencement Date					Jan. 1, 2016
Measurement Period End Date					Dec. 31, 2018

Segment Information (Textual) (

Segment Information (Textual) (Details) - segment	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Segment Reporting [Abstract]
Number of Reportable Segments	5	7

Segment Information - Real Esta

Segment Information - Real Estate Investments, at Cost of Company's Reportable Segments (Details) - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Operating properties		$ 3,703,193	$ 3,693,000
Assets held for sale	[1],[2],[3]	0	794,588
Total		3,703,193	4,487,588
Construction-in-progress		319,656	268,983
Land held for development		132,747	130,479
Philadelphia CBD [Member]
Segment Reporting Information [Line Items]
Operating properties	[2]	1,172,188	1,157,667
Pennsylvania Suburbs [Member]
Segment Reporting Information [Line Items]
Operating properties	[1]	1,017,947	1,019,280
Metropolitan DC [Member]
Segment Reporting Information [Line Items]
Operating properties	[1]	1,124,662	1,129,206
Austin, Texas [Member]
Segment Reporting Information [Line Items]
Operating properties		165,413	164,518
Other [Member]
Segment Reporting Information [Line Items]
Operating properties	[1],[4]	$ 222,983	$ 222,329
[1]	As of December 31, 2015, the 58 properties associated with the series of related transactions with Och-Ziff Real Estate were classified as held for sale on the consolidated balance sheets. On February 4, 2016, the Company completed the series of transactions, resulting in the disposition of the properties. See Note 3, “Real Estate Investments,” for further information regarding the disposition. The sale is not classified as a significant disposition under the accounting guidance for discontinued operations.
[2]	As of December 31, 2015, the office property located at 2970 Market Street in Philadelphia, Pennsylvania commonly known as 30th Street Main Post Office (“Cira Square”) was classified as held for sale on the consolidated balance sheets. The Company disposed of its interests in the property on February 5, 2016. See Note 3, "Real Estate Investments," for further information. The sale is not classified as a significant disposition under the accounting guidance for discontinued operations.
[3]	Real estate investments related to assets held for sale above represents gross real estate assets and does not include accumulated depreciation or intangible assets on the balance sheets of the properties held for sale.
[4]	As a result of the Och-Ziff Sale that occurred on February 4, 2016, the Company narrowed its segments to five segments located in: (1) Pennsylvania Suburbs, (2) Philadelphia Central Business District (“CBD”), (3) Metropolitan Washington, D.C. and (4) Austin, Texas. The Och-Ziff Sale disposed of the entire Richmond, Virginia segment. Subsequent to the Och-Ziff Sale, the segments previously defined as New Jersey/Delaware and California are now being managed as a consolidated segment entitled (5) “Other,” as these geographies no longer provide a significant revenue contribution. Accordingly, the chief operating decision maker revised the management structure, reallocated resources, and is assessing business operations of the five segments as of January 1, 2016.

Segment Information - Real Es62

Segment Information - Real Estate Investments, at Cost of Company's Reportable Segments (Parenthetical) (Details) - property	Mar. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Number of Properties	121
Cira Square [Member] | Held for Sale Properties Included in Continuing Operations [Member]
Segment Reporting Information [Line Items]
Number of Properties		58

Segment Information - Net Opera

Segment Information - Net Operating Income of Company's Reportable Segments (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Total revenue		$ 136,502	$ 150,406
Operating expenses	[1]	(54,775)	(60,698)
Net operating income		81,727	89,708
Operating Segments [Member] | Philadelphia CBD [Member]
Segment Reporting Information [Line Items]
Total revenue		49,670	52,973
Operating expenses	[1]	(19,256)	(18,390)
Net operating income		30,414	34,583
Operating Segments [Member] | Pennsylvania Suburbs [Member]
Segment Reporting Information [Line Items]
Total revenue		37,106	39,890
Operating expenses	[1]	(13,155)	(14,585)
Net operating income		23,951	25,305
Operating Segments [Member] | Metropolitan DC [Member]
Segment Reporting Information [Line Items]
Total revenue		27,339	27,406
Operating expenses	[1]	(10,899)	(11,860)
Net operating income		16,440	15,546
Operating Segments [Member] | Austin, Texas [Member]
Segment Reporting Information [Line Items]
Total revenue	[2]	8,547	934
Operating expenses	[1],[2]	(3,255)	(870)
Net operating income	[2]	5,292	64
Operating Segments [Member] | Other [Member]
Segment Reporting Information [Line Items]
Total revenue	[3]	12,740	27,781
Operating expenses	[1],[3]	(7,602)	(14,578)
Net operating income	[3]	5,138	13,203
Corporate [Member]
Segment Reporting Information [Line Items]
Total revenue		1,100	1,422
Operating expenses	[1]	(608)	(415)
Net operating income		$ 492	$ 1,007
[1]	Includes property operating expense, real estate taxes and third party management expense.
[2]	On June 22, 2015 the Company acquired the remaining 50.0% interest in Broadmoor Austin Associates. As such, the Company has seven wholly owned properties in its Austin, Texas business segment at March 31, 2016. In addition, net operating income for the three months ended March 31, 2016 and 2015 includes management fees and related expenses for services provided by the Company to the Austin Venture.
[3]	See footnote (c) at the “Real estate investments, at cost” table above for further information regarding this segment.

Segment Information - Net Ope64

Segment Information - Net Operating Income of Company's Reportable Segments (Parenthetical) (Details) - property	Mar. 31, 2016	Jun. 22, 2015
Segment Reporting Information [Line Items]
Number of Properties	121
Austin, Texas [Member]
Segment Reporting Information [Line Items]
Number of Properties	7
Broadmoor Austin Associates [Member]
Segment Reporting Information [Line Items]
Percentage of ownership interests		50.00%

Segment Information - Unconsoli

Segment Information - Unconsolidated Real Estate Ventures of Company's Reportable Segments (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Investment in Real Estate Ventures, at equity		$ 278,659		$ 241,004
Equity in income (loss) of Real Estate Ventures		(403)	$ 131
Philadelphia CBD [Member]
Segment Reporting Information [Line Items]
Investment in Real Estate Ventures, at equity	[1]	57,477		44,089
Equity in income (loss) of Real Estate Ventures	[1]	455	(300)
Pennsylvania Suburbs [Member]
Segment Reporting Information [Line Items]
Investment in Real Estate Ventures, at equity		16,737		16,408
Equity in income (loss) of Real Estate Ventures		265	(6)
Metropolitan DC [Member]
Segment Reporting Information [Line Items]
Investment in Real Estate Ventures, at equity		119,713		118,422
Equity in income (loss) of Real Estate Ventures		(448)	(50)
MAP Venture [Member]
Segment Reporting Information [Line Items]
Investment in Real Estate Ventures, at equity	[2]	24,554		0
Equity in income (loss) of Real Estate Ventures	[2]	(556)	0
Other [Member]
Segment Reporting Information [Line Items]
Investment in Real Estate Ventures, at equity	[3]	1,551		1,657
Equity in income (loss) of Real Estate Ventures	[3]	161	134
Austin, Texas [Member]
Segment Reporting Information [Line Items]
Investment in Real Estate Ventures, at equity	[4]	58,627		$ 60,428
Equity in income (loss) of Real Estate Ventures	[4]	$ (280)	$ 353
[1]	Investment in real estate ventures increased by $12.8 million as a result of the Company’s cash payment to evo at Cira to purchase Campus Crest’s entire 30% interest in evo at Cira and, as a result, each of the Company and HSRE owns a 50% interest in evo at Cira. See Note 4, “Investment in Unconsolidated Real Estate Ventures,” for further information.
[2]	The MAP Venture represents a joint venture formed between the Company and MAP Ground Lease Holdings LLC, an affiliate of Och-Ziff Capital Management Group, LLC, on February 4, 2016. See Note 4 “Investment in Unconsolidated Real Estate Ventures,” to our consolidated financial statements for further information. The MAP Venture’s business operations, including properties in Richmond, Virginia; New Jersey/Delaware and Pennsylvania Suburbs, are centrally managed with the results reported to management of the Company on a consolidated basis. As a result, the investment in the MAP Venture is separately presented. All other unconsolidated real estate ventures are managed consistently with the Company’s regional segments.
[3]	See footnote (c) at the “Real estate investments, at cost” table above for further information regarding this segment.
[4]	Investment in real estate ventures does not include the $1.1 million negative investment balance in one real estate venture as of December 31, 2015, which is included in other liabilities. The Company disposed of its interest in this venture during the first quarter of 2016. See Note 4, "Investment in Unconsolidated Real Estate Ventures," for further information.

Segment Information - Unconso66

Segment Information - Unconsolidated Real Estate Ventures of Company's Reportable Segments (Parenthetical) (Details) - USD ($) $ in Thousands	Mar. 02, 2016	Mar. 31, 2016	Jan. 29, 2016	Dec. 31, 2015	Jan. 25, 2013
Segment Reporting Information [Line Items]
Other liabilities		$ 37,749		$ 31,379
evo at Cira Centre South Venture [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Segment Reporting Information [Line Items]
Cash paid to acquire real estate ventures	$ 12,800
Equity method investment percentage of interests acquired by the Company and HSRE	30.00%
Equity method investment percentage	50.00%				30.00%
evo at Cira Centre South Venture [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] | HSRE, LLC [Member]
Segment Reporting Information [Line Items]
Cash paid to acquire real estate ventures	$ 6,600
Equity method investment percentage	50.00%				40.00%
Coppell Associates [Member]
Segment Reporting Information [Line Items]
Equity method investment percentage			50.00%
Other liabilities				$ 1,100

Segment Information - Reconcili

Segment Information - Reconciliation of Consolidated NOI to Consolidated Net Income (Details) - USD ($) $ in Thousands	Jan. 14, 2016	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting [Abstract]
Consolidated net operating income		$ 81,727	$ 89,708
Less:
Interest expense		(23,691)	(28,176)
Interest expense - amortization of deferred financing costs		(774)	(1,079)
Interest expense - financing obligation		(281)	(286)
Depreciation and amortization		(48,873)	(51,111)
General and administrative expenses		(9,120)	(8,636)
Equity in income (loss) of Real Estate Ventures		(403)	131
Provision for impairment		(7,390)	(1,726)
Loss on early extinguishment of debt	$ (66,590)	(66,590)	0
Plus:
Interest income		320	750
Net gain on disposition of real estate		115,456	9,019
Net gain on real estate venture transactions		5,929	0
Net income		$ 46,310	$ 8,594

Commitments and Contingencies68

Commitments and Contingencies (Textual) (Details) - USD ($) $ in Millions	Apr. 02, 2015	Mar. 31, 2016
Property Subject to or Available for Operating Lease [Line Items]
Associated letter of credit		$ 10
Development And Redevelopment [Member]
Property Subject to or Available for Operating Lease [Line Items]
Contractual obligations		196.4
Capital Expenditures For Tenant Improvements [Member]
Property Subject to or Available for Operating Lease [Line Items]
Contractual obligations		54
TB-BDN Plymouth Apartments [Member]
Property Subject to or Available for Operating Lease [Line Items]
Guarantor obligations, current carrying value		3.2
Construction Loan		56
1919 Venture [Member]
Property Subject to or Available for Operating Lease [Line Items]
Guarantor obligations, current carrying value		88.9
evo at Cira Centre South Venture [Member]
Property Subject to or Available for Operating Lease [Line Items]
Guarantor obligations, current carrying value		26.5
Construction Loan		97.8
PJP VII [Member]
Property Subject to or Available for Operating Lease [Line Items]
Guarantor obligations, current carrying value		0.5
A618 Market Street
Property Subject to or Available for Operating Lease [Line Items]
Contingent consideration, liability	$ 2	1.7
Fair value of contingent consideration	$ 1.6
Put Option [Member]
Property Subject to or Available for Operating Lease [Line Items]
Purchase price		$ 35
Minimum [Member]
Property Subject to or Available for Operating Lease [Line Items]
Lease terms		5 years
Maximum [Member]
Property Subject to or Available for Operating Lease [Line Items]
Lease terms		73 years

Commitments and Contingencies -

Commitments and Contingencies - Minimum Future Rental Payments on Non-cancelable Leases (Details) $ in Thousands	Mar. 31, 2016USD ($)
Commitments And Contingencies Disclosure [Abstract]
2016 (nine months remaining)	$ 995
2,017	1,327
2,018	1,327
2,019	1,327
2,020	1,327
Thereafter	67,269
Total	$ 73,572

Subsequent Events (Textual) (De

Subsequent Events (Textual) (Details) $ in Thousands	Apr. 07, 2016USD ($)ft²	Apr. 02, 2016USD ($)	Mar. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Subsequent Event [Line Items]
Mortgage notes payable, net			$ 345,310	$ 545,753
Subsequent Event [Member] | Unsecured Notes Payable [Member]
Subsequent Event [Line Items]
Repayments of unsecured notes		$ 149,900
Effective interest rate		6.00%
Subsequent Event [Member] | First Mortgage [Member] | Mortgage Loans over $1,000,000 [Member] | Office Building at Two Logan Square [Member]
Subsequent Event [Line Items]
Mortgage notes payable, net	$ 86,900
Net Rentable Square Feet | ft²	708,844
Loan interest rate	3.98%
Loan maturity date	May 1, 2020
Subsequent Event [Member] | Former First Mortgage | Mortgage Loans over $1,000,000 [Member] | Office Building at Two Logan Square [Member]
Subsequent Event [Line Items]
Loan interest rate	7.57%
Long-term Debt, Gross	$ 86,600