10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark One)

☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the quarterly period ended March 31, 2017

or

☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the transition period from                      to                     

Commission file number

001-9106 (Brandywine Realty Trust)

000-24407 (Brandywine Operating Partnership, L.P.)

Brandywine Realty Trust

Brandywine Operating Partnership, L.P.

(Exact name of registrant as specified in its charter)

MARYLAND (Brandywine Realty Trust)	23-2413352
DELAWARE (Brandywine Operating Partnership L.P.)	23-2862640
(State or other jurisdiction of	(I.R.S. Employer
incorporation or organization)	Identification No.)
555 East Lancaster Avenue
Radnor, Pennsylvania	19087
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code (610) 325-5600

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Brandywine Realty Trust	Yes ☒  No ☐
Brandywine Operating Partnership, L.P.	Yes ☒  No ☐

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

Brandywine Realty Trust	Yes ☒  No ☐
Brandywine Operating Partnership, L.P.	Yes ☒  No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer”, “accelerated filer”, “smaller reporting company”, and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Brandywine Realty Trust:

Large accelerated filer ☒	Accelerated filer ☐	Non-accelerated filer ☐
Smaller reporting company ☐	Emerging growth company ☐

Brandywine Operating Partnership, L.P.:

Large accelerated filer ☐	Accelerated filer ☐	Non-accelerated filer ☒
Smaller reporting company ☐	Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Brandywine Realty Trust Yes ☐  No ☒

Brandywine Operating Partnership, L.P. Yes ☐  No ☒

A total of 175,327,436 Common Shares of Beneficial Interest, par value $0.01 per share of Brandywine Realty Trust, were outstanding as of April 21, 2017.

EXPLANATORY NOTE

This report combines the quarterly reports on Form 10-Q for the period ended March 31, 2017 of Brandywine Realty Trust (the “Parent Company”) and Brandywine Operating Partnership L.P. (the “Operating Partnership”). The Parent Company is a Maryland real estate investment trust, or REIT, that owns its assets and conducts its operations through the Operating Partnership, a Delaware limited partnership, and subsidiaries of the Operating Partnership. The Parent Company, the Operating Partnership and their consolidated subsidiaries are collectively referred to in this report as the “Company”. In addition, as used in this report, terms such as “we”, “us”, and “our” may refer to the Company, the Parent Company, or the Operating Partnership.

The Parent Company is the sole general partner of the Operating Partnership and, as of March 31, 2017, owned a 99.2% interest in the Operating Partnership. The remaining 0.8% interest consists of common units of limited partnership interest issued by the Operating Partnership to third parties in exchange for contributions of properties to the Operating Partnership. As the sole general partner of the Operating Partnership, the Parent Company has full and complete authority over the Operating Partnership’s day-to-day operations and management.

Management operates the Parent Company and the Operating Partnership as one enterprise. The management of the Parent Company consists of the same members as the management of the Operating Partnership.

As general partner with control of the Operating Partnership, the Parent Company consolidates the Operating Partnership for financial reporting purposes, and the Parent Company does not have significant assets other than its investment in the Operating Partnership. Therefore, the assets and liabilities of the Parent Company and the Operating Partnership are the same on their respective financial statements. The separate discussions of the Parent Company and the Operating Partnership in this report should be read in conjunction with each other to understand the results of the Company's operations on a consolidated basis and how management operates the Company.

The Company believes that combining the quarterly reports on Form 10-Q of the Parent Company and the Operating Partnership into a single report will result in the following benefits:

• facilitate a better understanding by the investors of the Parent Company and the Operating Partnership by enabling them to view the business as a whole in the same manner as management views and operates the business;

• remove duplicative disclosures and provide a more straightforward presentation in light of the fact that a substantial portion of the disclosure applies to both the Parent Company and the Operating Partnership; and

• create time and cost efficiencies through the preparation of one combined report instead of two separate reports.

There are few differences between the Parent Company and the Operating Partnership, which are reflected in the footnote disclosures in this report. The Company believes it is important to understand the differences between the Parent Company and the Operating Partnership in the context of how these entities operate as an interrelated consolidated company. The Parent Company is a REIT, whose only material asset is its ownership of partnership interests of the Operating Partnership. As a result, the Parent Company does not conduct business itself, other than acting as the sole general partner of the Operating Partnership, issuing equity from time to time and guaranteeing the debt obligations of the Operating Partnership. The Operating Partnership holds substantially all the assets of the Company and directly or indirectly holds the ownership interests in the Company’s Real Estate Ventures. The Operating Partnership conducts the operations of the Company’s business and is structured as a partnership with no publicly traded equity. Except for net proceeds from equity issuances by the Parent Company, which are contributed to the Operating Partnership in exchange for partnership units, the Operating Partnership generates the capital required by the Company’s business through the Operating Partnership’s operations, by the Operating Partnership’s incurrence of indebtedness (directly and through subsidiaries) and through the issuance of partnership units of the Operating Partnership or equity interests in subsidiaries of the Operating Partnership.

The equity and non-controlling interests in the Parent Company and the Operating Partnership’s equity are the main areas of difference between the consolidated financial statements of the Parent Company and the Operating Partnership. The common units of limited partnership interest in the Operating Partnership are accounted for as partners’ equity in the Operating Partnership’s financial statements while the common units of limited partnership interests held by parties other than the Parent Company are presented as non-controlling interests in the Parent Company’s financial statements. The differences between the Parent Company and the Operating Partnership’s equity relate to the differences in the equity issued at the Parent Company and Operating Partnership levels.

3

To help investors understand the significant differences between the Parent Company and the Operating Partnership, this report presents the following as separate notes or sections for each of the Parent Company and the Operating Partnership:

• Consolidated Financial Statements; and

• Notes to the Parent Company’s and Operating Partnership’s Equity.

This report also includes separate Item 4. (Controls and Procedures) disclosures and separate Exhibit 31 and 32 certifications for each of the Parent Company and the Operating Partnership in order to establish that the Chief Executive Officer and the Chief Financial Officer of each entity have made the requisite certifications and that the Parent Company and Operating Partnership are compliant with Rule 13a-15 or Rule 15d-15 of the Securities Exchange Act of 1934, as amended, and 18 U.S.C. § 1350.

In order to highlight the differences between the Parent Company and the Operating Partnership, the separate sections in this report for the Parent Company and the Operating Partnership specifically refer to the Parent Company and the Operating Partnership. In the sections that combine disclosures of the Parent Company and the Operating Partnership, this report refers to such disclosures as those of the Company. Although the Operating Partnership is generally the entity that directly or indirectly enters into contracts and real estate ventures and holds assets and incurs debt, reference to the Company is appropriate because the business is one enterprise and the Parent Company operates the business through the Operating Partnership.

4

TABLE OF CONTENTS

	Page
PART I — FINANCIAL INFORMATION
Item 1. Financial Statements
Brandywine Realty Trust
Financial Statements of Brandywine Realty Trust	6
Consolidated Balance Sheets as of March 31, 2017 and December 31, 2016	6
Consolidated Statements of Operations for the three-month periods ended March 31, 2017 and 2016	7
Consolidated Statements of Comprehensive Income for the three-month periods ended March 31, 2017 and 2016	8
Consolidated Statements of Beneficiaries’ Equity for the three-month periods ended March 31, 2017 and 2016	9
Consolidated Statements of Cash Flows for the three-month periods ended March 31, 2017 and 2016	11
Brandywine Operating Partnership, L.P.
Financial Statements of Brandywine Operating Partnership, L.P.	12
Consolidated Balance Sheets as of March 31, 2017 and December 31, 2016	12
Consolidated Statements of Operations for the three-month periods ended March 31, 2017 and 2016	13
Consolidated Statements of Comprehensive Income for the three-month periods ended March 31, 2017 and 2016	14
Consolidated Statements of Partners’ Equity for the three-month periods ended March 31, 2017 and 2016	15
Consolidated Statements of Cash Flows for the three-month periods ended March 31, 2017 and 2016	17
Notes to Unaudited Consolidated Financial Statements	18
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	35
Item 3. Quantitative and Qualitative Disclosures about Market Risk	52
Item 4. Controls and Procedures	53
PART II — OTHER INFORMATION	54
Item 1. Legal Proceedings	54
Item 1A. Risk Factors	54
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	54
Item 3. Defaults Upon Senior Securities	54
Item 4. Mine Safety Disclosures	54
Item 5. Other Information	54
Item 6. Exhibits	55
Signatures	57
Index to Exhibits	59

Filing Format

This combined Form 10-Q is being filed separately by Brandywine Realty Trust and Brandywine Operating Partnership, L.P.

5

PART I - FINANCIAL INFORMATION

Item 1.— Financial Statements

BRANDYWINE REALTY TRUST

CONSOLIDATED BALANCE SHEETS

(in thousands, except share and per share information)

	March 31,			December 31,
	2017			2016
ASSETS	(unaudited)
Real estate investments:
Operating properties	$	3,702,204		$	3,586,295
Accumulated depreciation		(864,196	)		(852,476	)
Operating real estate investments, net		2,838,008			2,733,819
Construction-in-progress		166,372			297,462
Land held for development		153,268			150,970
Total real estate investments, net		3,157,648			3,182,251
Assets held for sale, net		6,262			41,718
Cash and cash equivalents		234,654			193,919
Accounts receivable, net of allowance of $2,622 and $2,373 in 2017 and 2016, respectively		12,099			12,446
Accrued rent receivable, net of allowance of $13,703 and $13,743 in 2017 and 2016, respectively		152,819			149,624
Investment in Real Estate Ventures, equity method		264,941			281,331
Deferred costs, net		92,425			91,342
Intangible assets, net		64,222			72,478
Other assets		116,792			74,104
Total assets	$	4,101,862		$	4,099,213
LIABILITIES AND BENEFICIARIES' EQUITY
Mortgage notes payable, net	$	320,484		$	321,549
Unsecured term loans, net		248,181			248,099
Unsecured senior notes, net		1,444,006			1,443,464
Accounts payable and accrued expenses		115,079			103,404
Distributions payable		30,047			30,032
Deferred income, gains and rent		30,592			31,620
Acquired lease intangibles, net		16,604			18,119
Liabilities related to assets held for sale		387			81
Other liabilities		16,916			19,408
Total liabilities	$	2,222,296		$	2,215,776
Commitments and contingencies (See Note 14)
Brandywine Realty Trust's Equity:
Preferred Shares (shares authorized-20,000,000)
6.90% Series E Preferred Shares, $0.01 par value; issued and outstanding- 4,000,000 in 2017 and 2016		40			40
Common Shares of Brandywine Realty Trust's beneficial interest, $0.01 par value; shares authorized 400,000,000; 175,202,404 and 175,140,760 issued and outstanding in 2017 and 2016, respectively		1,752			1,752
Additional paid-in-capital		3,262,459			3,258,870
Deferred compensation payable in common shares		14,244			13,684
Common shares in grantor trust, 936,939 in 2017, 899,457 in 2016		(14,244	)		(13,684	)
Cumulative earnings		560,422			539,319
Accumulated other comprehensive loss		(457	)		(1,745	)
Cumulative distributions		(1,961,739	)		(1,931,892	)
Total Brandywine Realty Trust's equity		1,862,477			1,866,344
Non-controlling interests		17,089			17,093
Total beneficiaries' equity	$	1,879,566		$	1,883,437
Total liabilities and beneficiaries' equity	$	4,101,862		$	4,099,213

The accompanying notes are an integral part of these consolidated financial statements.

6

BRANDYWINE REALTY TRUST

CONSOLIDATED STATEMENTS OF OPERATIONS

(unaudited, in thousands, except share and per share information)

	Three-month periods ended
	March 31,
	2017			2016
Revenue
Rents	$	103,332		$	110,163
Tenant reimbursements		18,535			20,054
Termination fees		1,673			294
Third party management fees, labor reimbursement and leasing		6,485			5,235
Other		895			756
Total revenue		130,920			136,502
Operating expenses
Property operating expenses		36,885			40,879
Real estate taxes		11,749			11,886
Third party management expenses		2,447			2,010
Depreciation and amortization		45,892			48,873
General and administrative expenses		9,425			9,120
Provision for impairment		2,730			7,390
Total operating expenses		109,128			120,158
Operating income		21,792			16,344
Other income (expense)
Interest income		393			320
Interest expense		(21,437	)		(23,691	)
Interest expense - amortization of deferred financing costs		(634	)		(774	)
Interest expense - financing obligation		-			(281	)
Equity in loss of Real Estate Ventures		(748	)		(403	)
Net gain on disposition of real estate		7,323			115,456
Net gain on Real Estate Venture transactions		14,582			5,929
Loss on early extinguishment of debt		-			(66,590	)
Net income		21,271			46,310
Net income attributable to non-controlling interests		(169	)		(389	)
Net income attributable to Brandywine Realty Trust		21,102			45,921
Distribution to preferred shareholders		(1,725	)		(1,725	)
Nonforfeitable dividends allocated to unvested restricted shareholders		(99	)		(105	)
Net income attributable to Common Shareholders of Brandywine Realty Trust	$	19,278		$	44,091
Basic income per Common Share:
Continuing operations	$	0.11		$	0.25
Diluted income per Common Share:
Continuing operations	$	0.11		$	0.25
Basic weighted average shares outstanding		175,176,964			174,788,945
Diluted weighted average shares outstanding		176,201,872			175,471,413
Distributions declared per Common Share	$	0.16		$	0.15

The accompanying notes are an integral part of these consolidated financial statements.

7

BRANDYWINE REALTY TRUST

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(unaudited, in thousands)

	Three-month periods ended
	March 31,
	2017			2016
Net income	$	21,271		$	46,310
Comprehensive income:
Unrealized gain (loss) on derivative financial instruments		1,014			(9,405	)
Reclassification of realized losses on derivative financial instruments to operations, net (1)		286			246
Total comprehensive income (loss)		1,300			(9,159	)
Comprehensive income		22,571			37,151
Comprehensive income attributable to non-controlling interest		(181	)		(309	)
Comprehensive income attributable to Brandywine Realty Trust	$	22,390		$	36,842

(1) Amounts reclassified from comprehensive income to interest expense within the Consolidated Statements of Operations.

The accompanying notes are an integral part of these consolidated financial statements.

8

BRANDYWINE REALTY TRUST

CONSOLIDATED STATEMENTS OF BENEFICIARIES’ EQUITY

For thethree-month period ended March 31, 2017

(unaudited, in thousands, except number of shares)

March 31, 2017
	Number of Preferred Shares		Par Value of Preferred Shares		Number of Common Shares			Number of Rabbi Trust/Deferred Compensation Shares			Common Shares of Brandywine Realty Trust's beneficial interest		Additional Paid-in Capital			Deferred Compensation Payable in Common Shares		Common Shares in Grantor Trust			Cumulative Earnings		Accumulated Other Comprehensive Income (Loss)			Cumulative Distributions			Non-Controlling Interests			Total
BALANCE, December 31, 2016		4,000,000	$	40		175,140,760			899,457		$	1,752	$	3,258,870		$	13,684	$	(13,684	)	$	539,319	$	(1,745	)	$	(1,931,892	)	$	17,093		$	1,883,437
Net income																						21,102								169			21,271
Other comprehensive income																								1,288						12			1,300
Issuance of partnership interest in consolidated real estate venture																														29			29
Equity issuance costs														(219	)																		(219	)
Bonus share issuance						6,752								110																			110
Share-based compensation activity						56,669			39,870					3,769								1											3,770
Share Issuance from/(to) Deferred Compensation Plan						(354	)		(2,388	)				(48	)		560		(560	)													(48	)
Share Choice Plan issuance						(1,423	)																										-
Adjustment to Non-controlling Interest														(23	)															23			-
Preferred Share distributions																											(1,725	)					(1,725	)
Distributions declared ($0.16 per share)																											(28,122	)		(237	)		(28,359	)
BALANCE, March 31, 2017		4,000,000	$	40		175,202,404			936,939		$	1,752	$	3,262,459		$	14,244	$	(14,244	)	$	560,422	$	(457	)	$	(1,961,739	)	$	17,089		$	1,879,566

The accompanying notes are an integral part of these consolidated financial statements.

9

BRANDYWINE REALTY TRUST

CONSOLIDATED STATEMENT OF BENEFICIARIES’ EQUITY

For the three-month period endedMarch 31, 2016

(unaudited, in thousands, except number of shares)

March 31, 2016
	Number of Preferred Shares		Par Value of Preferred Shares		Number of Common Shares			Number of Rabbi Trust/Deferred Compensation Shares		Common Shares of Brandywine Realty Trust's beneficial interest		Additional Paid-in Capital			Deferred Compensation Payable in Common Shares		Common Shares in Grantor Trust			Cumulative Earnings		Accumulated Other Comprehensive Loss			Cumulative Distributions			Non-Controlling Interests			Total
BALANCE, December 31, 2015		4,000,000	$	40		174,688,568			745,686	$	1,747	$	3,252,622		$	11,918	$	(11,918	)	$	499,086	$	(5,192	)	$	(1,814,378	)	$	18,166		$	1,952,091
Net income																					45,921								389			46,310
Other comprehensive loss																							(9,079	)					(80	)		(9,159	)
Issuance of partnership interest in consolidated real estate venture																													18			18
Share-based compensation activity						210,116					2		3,296								34											3,332
Share Issuance from/to Deferred Compensation Plan						(8,252	)		101,321							1,237		(1,237	)													-
Adjustment to Non-controlling Interest													(10	)															10			-
Preferred Share distributions																										(1,725	)					(1,725	)
Distributions declared ($0.15 per share)																										(26,347	)		(230	)		(26,577	)
BALANCE, March 31, 2016		4,000,000	$	40		174,890,432			847,007	$	1,749	$	3,255,908		$	13,155	$	(13,155	)	$	545,041	$	(14,271	)	$	(1,842,450	)	$	18,273		$	1,964,290

The accompanying notes are an integral part of these consolidated financial statements.

10

BRANDYWINE REALTY TRUST

CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited, in thousands)

	Three-month periods ended March 31,
	2017			2016
Cash flows from operating activities:
Net income	$	21,271		$	46,310
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization		45,892			48,873
Amortization of deferred financing costs		634			774
Amortization of debt discount/(premium), net		362			382
Amortization of stock compensation costs		3,124			2,296
Straight-line rent income		(5,895	)		(6,104	)
Amortization of acquired above (below) market leases, net		(1,338	)		(2,232	)
Straight-line ground rent expense		22			22
Provision for doubtful accounts		707			215
Net gain on real estate venture transactions		(14,582	)		(5,929	)
Net gain on sale of interests in real estate		(7,323	)		(115,456	)
Loss on early extinguishment of debt		-			66,590
Provision for impairment		2,730			7,390
Real Estate Venture loss in excess of distributions		748			723
Deferred financing obligation		-			(253	)
Changes in assets and liabilities:
Accounts receivable		(917	)		246
Other assets		(10,926	)		(9,193	)
Accounts payable and accrued expenses		9,089			6,296
Deferred income, gains and rent		(3,333	)		(2,308	)
Other liabilities		(6	)		552
Net cash provided by operating activities		40,259			39,194
Cash flows from investing activities:
Proceeds from the sale of properties		74,159			704,911
Proceeds from real estate venture sales		27,230			4,812
Capital expenditures for tenant improvements		(11,408	)		(13,949	)
Capital expenditures for redevelopments		(5,505	)		(6,199	)
Capital expenditures for developments		(21,156	)		(54,405	)
Advances for the purchase of tenant assets, net of repayments		997			360
Investment in unconsolidated Real Estate Ventures		(4,910	)		(14,414	)
Deposits for real estate		268			(2,275	)
Escrowed cash		(32,009	)		6,991
Cash distribution from unconsolidated Real Estate Ventures in excess of cumulative equity income		8,306			1,436
Leasing costs paid		(4,129	)		(4,716	)
Net cash provided by investing activities		31,843			622,552
Cash flows from financing activities:
Repayments of mortgage notes payable		(1,215	)		(267,172	)
Proceeds from credit facility borrowings		-			195,000
Repayments of credit facility borrowings		-			(195,000	)
Debt financing costs paid		-			(72	)
Proceeds from the exercise of stock options		-			826
Shares used for employee taxes upon vesting of share awards		(129	)		(289	)
Partner contributions to consolidated real estate venture		29			18
Distributions paid to shareholders		(29,815	)		(28,004	)
Distributions to non-controlling interest		(237	)		(230	)
Net cash used in financing activities		(31,367	)		(294,923	)
Increase in cash and cash equivalents		40,735			366,823
Cash and cash equivalents at beginning of year		193,919			56,694
Cash and cash equivalents at end of period	$	234,654		$	423,517
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the three months ended March 31, 2017 and 2016 of $1,709 and $3,671, respectively	$	11,268		$	13,656
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid		30,047			28,278
Change in investment in real estate ventures as a result of dispositions		12,549			(1,130	)
Change in investment in real estate ventures related to non-cash disposition of property		-			(25,165	)
Change in capital expenditures financed through accounts payable at period end		1,273			4,235
Change in capital expenditures financed through retention payable at period end		(199	)		753

The accompanying notes are an integral part of these consolidated financial statements.

11

BRANDYWINE OPERATING PARTNERSHIP, L.P.

CONSOLIDATED BALANCE SHEETS

(in thousands, except unit and per unit information)

	March 31,			December 31,
	2017			2016
ASSETS	(unaudited)
Real estate investments:
Operating properties	$	3,702,204		$	3,586,295
Accumulated depreciation		(864,196	)		(852,476	)
Operating real estate investments, net		2,838,008			2,733,819
Construction-in-progress		166,372			297,462
Land held for development		153,268			150,970
Total real estate investments, net		3,157,648			3,182,251
Assets held for sale, net		6,262			41,718
Cash and cash equivalents		234,654			193,919
Accounts receivable, net of allowance of $2,622 and $2,373 in 2017 and 2016, respectively		12,099			12,446
Accrued rent receivable, net of allowance of $13,703 and $13,743 in 2017 and 2016, respectively		152,819			149,624
Investment in Real Estate Ventures, equity method		264,941			281,331
Deferred costs, net		92,425			91,342
Intangible assets, net		64,222			72,478
Other assets		116,792			74,104
Total assets	$	4,101,862		$	4,099,213
LIABILITIES AND PARTNERS' EQUITY
Mortgage notes payable, net	$	320,484		$	321,549
Unsecured term loans, net		248,181			248,099
Unsecured senior notes, net		1,444,006			1,443,464
Accounts payable and accrued expenses		115,079			103,404
Distributions payable		30,047			30,032
Deferred income, gains and rent		30,592			31,620
Acquired lease intangibles, net		16,604			18,119
Liabilities related to assets held for sale		387			81
Other liabilities		16,916			19,408
Total liabilities	$	2,222,296		$	2,215,776
Commitments and contingencies (See Note 14)
Redeemable limited partnership units at redemption value; 1,479,799 issued and outstanding in 2017 and 2016		23,899			23,795
Brandywine Operating Partnership, L.P.'s equity:
6.90% Series E-Linked Preferred Mirror Units; issued and outstanding- 4,000,000 in 2017 and 2016		96,850			96,850
General Partnership Capital; 175,202,404 and 175,140,760 units issued and outstanding in 2017 and 2016, respectively		1,757,455			1,762,764
Accumulated other comprehensive loss		(822	)		(2,122	)
Total Brandywine Operating Partnership, L.P.'s equity		1,853,483			1,857,492
Non-controlling interest - consolidated real estate ventures		2,184			2,150
Total partners' equity	$	1,855,667		$	1,859,642
Total liabilities and partners' equity	$	4,101,862		$	4,099,213

The accompanying notes are an integral part of these consolidated financial statements.

12

BRANDYWINE OPERATING PARTNERSHIP, L.P.

CONSOLIDATED STATEMENTS OF OPERATIONS

(unaudited, in thousands, except unit and per unit information)

	Three-month periods ended
	March 31,
	2017			2016
Revenue
Rents	$	103,332		$	110,163
Tenant reimbursements		18,535			20,054
Termination fees		1,673			294
Third party management fees, labor reimbursement and leasing		6,485			5,235
Other		895			756
Total revenue		130,920			136,502
Operating expenses
Property operating expenses		36,885			40,879
Real estate taxes		11,749			11,886
Third party management expenses		2,447			2,010
Depreciation and amortization		45,892			48,873
General and administrative expenses		9,425			9,120
Provision for impairment		2,730			7,390
Total operating expenses		109,128			120,158
Operating income		21,792			16,344
Other income (expense)
Interest income		393			320
Interest expense		(21,437	)		(23,691	)
Interest expense - amortization of deferred financing costs		(634	)		(774	)
Interest expense - financing obligation		-			(281	)
Equity in loss of Real Estate Ventures		(748	)		(403	)
Net gain on disposition of real estate		7,323			115,456
Net gain on Real Estate Venture transactions		14,582			5,929
Loss on early extinguishment of debt		-			(66,590	)
Net income		21,271			46,310
Net income from continuing operations attributable to non-controlling interests - consolidated real estate ventures		(5	)		(2	)
Net income attributable to Brandywine Operating Partnership		21,266			46,308
Distribution to preferred unitholders		(1,725	)		(1,725	)
Amounts allocated to unvested restricted unitholders		(99	)		(105	)
Net income attributable to Common Partnership Unitholders of Brandywine Operating Partnership, L.P.	$	19,442		$	44,478
Basic income per Common Partnership Unit:
Continuing operations	$	0.11		$	0.25
Diluted income per Common Partnership Unit:
Continuing operations	$	0.11		$	0.25
Basic weighted average common partnership units outstanding		176,656,763			176,324,047
Diluted weighted average common partnership units outstanding		177,681,671			177,006,515
Distributions declared per Common Partnership Unit	$	0.16		$	0.15

The accompanying notes are an integral part of these consolidated financial statements.

13

BRANDYWINE OPERATING PARTNERSHIP, L.P.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(unaudited, in thousands)

	Three-month periods ended
	March 31,
	2017			2016
Net income	$	21,271		$	46,310
Comprehensive income:
Unrealized gain (loss) on derivative financial instruments		1,014			(9,405	)
Reclassification of realized losses on derivative financial instruments to operations, net (1)		286			246
Total comprehensive income (loss)		1,300			(9,159	)
Comprehensive income		22,571			37,151
Comprehensive income attributable to non-controlling interest - consolidated real estate ventures		(5	)		(2	)
Comprehensive income attributable to Brandywine Operating Partnership, L.P.	$	22,566		$	37,149

(1) Amounts reclassified from comprehensive income to interest expense within the Consolidated Statements of Operations.

The accompanying notes are an integral part of these consolidated financial statements.

14

BRANDYWINE OPERATING PARTNERSHIP, L.P.

CONSOLIDATED STATEMENTS OF PARTNERS’ EQUITY

For thethree-month period ended March 31, 2017

(unaudited, in thousands, except number of units)

	Series E-Linked Preferred Mirror Units				General Partner Capital
	Units		Amount		Units			Amount			Accumulated Other Comprehensive Gain/(Loss)			Non-controlling Interest - Consolidated Real Estate Ventures		Total Partners' Equity
BALANCE, December 31, 2016		4,000,000	$	96,850		175,140,760		$	1,762,764		$	(2,122	)	$	2,150	$	1,859,642
Net income									21,266						5		21,271
Other comprehensive income												1,300					1,300
Deferred compensation obligation						(354	)		(48	)							(48	)
Issuance of LP Units									(219	)							(219	)
Issuance of partnership interest in consolidated real estate venture															29		29
Share Choice Plan issuance						(1,423	)										-
Bonus share issuance						6,752			110								110
Share-based compensation activity						56,669			3,769								3,769
Adjustment of redeemable partnership units to liquidation value at period end									(340	)							(340	)
Distributions to Preferred Mirror Units									(1,725	)							(1,725	)
Distributions to general partnership unitholders ($0.16 per unit)									(28,122	)							(28,122	)
BALANCE, March 31, 2017		4,000,000	$	96,850		175,202,404		$	1,757,455		$	(822	)	$	2,184	$	1,855,667

The accompanying notes are an integral part of these consolidated financial statements.

15

BRANDYWINE OPERATING PARTNERSHIP, L.P.

CONSOLIDATED STATEMENT OF PARTNERS’ EQUITY

For the three-month period endedMarch 31, 2016

(unaudited, in thousands, except number of units)

	Series E-Linked Preferred Mirror Units				General Partner Capital
	Units		Amount		Units			Amount			Accumulated Other Comprehensive Loss			Non-controlling Interest - Consolidated Real Estate Ventures			Total Partners' Equity
BALANCE, December 31, 2015		4,000,000	$	96,850		174,688,568		$	1,836,692		$	(5,597	)	$	2,032		$	1,929,977
Net income									46,308						2			46,310
Other comprehensive loss												(9,159	)					(9,159	)
Deferred compensation obligation						(8,252	)											-
Issuance of partnership interest in consolidated real estate venture															18			18
Share-based compensation activity						210,116			3,332									3,332
Adjustment of redeemable partnership units to liquidation value at period end									(401	)								(401	)
Adjustment to non-controlling interest												1			(1	)		-
Distributions to Preferred Mirror Units									(1,725	)								(1,725	)
Distributions to general partnership unitholders ($0.15 per unit)									(26,347	)								(26,347	)
BALANCE, March 31, 2016		4,000,000	$	96,850		174,890,432		$	1,857,859		$	(14,755	)	$	2,051		$	1,942,005

The accompanying notes are an integral part of these consolidated financial statements.

16

BRANDYWINE OPERATING PARTNERSHIP L.P.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited, in thousands)

	Three-month periods ended March 31,
	2017			2016
Cash flows from operating activities:
Net income	$	21,271		$	46,310
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization		45,892			48,873
Amortization of deferred financing costs		634			774
Amortization of debt discount/(premium), net		362			382
Amortization of stock compensation costs		3,124			2,296
Straight-line rent income		(5,895	)		(6,104	)
Amortization of acquired above (below) market leases, net		(1,338	)		(2,232	)
Straight-line ground rent expense		22			22
Provision for doubtful accounts		707			215
Net gain on real estate venture transactions		(14,582	)		(5,929	)
Net gain on sale of interests in real estate		(7,323	)		(115,456	)
Loss on early extinguishment of debt		-			66,590
Provision for impairment		2,730			7,390
Real Estate Venture loss in excess of distributions		748			723
Deferred financing obligation		-			(253	)
Changes in assets and liabilities:
Accounts receivable		(917	)		246
Other assets		(10,926	)		(9,193	)
Accounts payable and accrued expenses		9,089			6,296
Deferred income, gains and rent		(3,333	)		(2,308	)
Other liabilities		(6	)		552
Net cash provided by operating activities		40,259			39,194
Cash flows from investing activities:
Proceeds from the sale of properties		74,159			704,911
Proceeds from real estate venture sales		27,230			4,812
Capital expenditures for tenant improvements		(11,408	)		(13,949	)
Capital expenditures for redevelopments		(5,505	)		(6,199	)
Capital expenditures for developments		(21,156	)		(54,405	)
Advances for the purchase of tenant assets, net of repayments		997			360
Investment in unconsolidated Real Estate Ventures		(4,910	)		(14,414	)
Deposits for real estate		268			(2,275	)
Escrowed cash		(32,009	)		6,991
Cash distribution from unconsolidated Real Estate Ventures in excess of cumulative equity income		8,306			1,436
Leasing costs paid		(4,129	)		(4,716	)
Net cash provided by investing activities		31,843			622,552
Cash flows from financing activities:
Repayments of mortgage notes payable		(1,215	)		(267,172	)
Proceeds from credit facility borrowings		-			195,000
Repayments of credit facility borrowings		-			(195,000	)
Debt financing costs paid		-			(72	)
Proceeds from the exercise of stock options		-			826
Shares used for employee taxes upon vesting of share awards		(129	)		(289	)
Partner contributions to consolidated real estate venture		29			18
Distributions paid to preferred and common partnership units		(30,052	)		(28,234	)
Net cash used in financing activities		(31,367	)		(294,923	)
Increase in cash and cash equivalents		40,735			366,823
Cash and cash equivalents at beginning of year		193,919			56,694
Cash and cash equivalents at end of period	$	234,654		$	423,517
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the three months ended March 31, 2017 and 2016 of $1,709 and $3,671, respectively	$	11,268		$	13,656
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid		30,047			28,278
Change in investment in real estate ventures as a result of dispositions		12,549			(1,130	)
Change in investment in real estate ventures related to non-cash disposition of property		-			(25,165	)
Change in capital expenditures financed through accounts payable at period end		1,273			4,235
Change in capital expenditures financed through retention payable at period end		(199	)		753

The accompanying notes are an integral part of these consolidated financial statements.

17

BRANDYWINE REALTY TRUST AND BRANDYWINE OPERATING PARTNERSHIP, L.P.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2017

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, residential, 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, 2017, owned a 99.2% 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, 2017, the Company owned 104 properties that contain an aggregate of approximately 16.5 million net rentable square feet and consist of 90 office properties, six mixed-use properties, one retail property (97 properties, collectively the “Core Properties”), three development properties, three redevelopment properties and one property classified as held for sale (collectively, the “Properties”).  In addition, as of March 31, 2017, the Company owned economic interests in 13 unconsolidated real estate ventures (collectively, the “Real Estate Ventures”), seven of which own properties that contain an aggregate of approximately 8.0 million net rentable square feet of office space; two of which own 4.3 acres of undeveloped parcels of land; two of which own 1.4 acres of land under active development and two of which own residential towers that contain 345 and 321 apartment units, respectively. As of March 31, 2017, the Company also owned 312 acres of undeveloped land and held options to purchase approximately 60 additional acres of undeveloped land.  As of March 31, 2017, the total potential development that these land parcels could support, including the parcels under option, under current zoning and entitlements, amounted to an estimated 12.2 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 and Austin, Texas. In addition to managing properties owned by the Company, as of March 31, 2017, the Company was managing approximately 10.2 million net rentable square feet of office and industrial properties for third parties and 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, 2017, the management company subsidiaries were managing properties containing an aggregate of approximately 26.7 million net rentable square feet, of which approximately 16.5 million net rentable square feet related to Properties owned by the Company and approximately 10.2 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.

2. BASIS OF PRESENTATION

Basis of Presentation

The consolidated financial statements have been prepared by the Company pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) for interim financial statements. Certain information and footnote disclosures normally included in the annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP") have been condensed or omitted pursuant to such rules and regulations. In the opinion of management, all adjustments (consisting solely of normal recurring matters) for a fair statement of the financial position of the Company as of March 31, 2017, the results of its operations for the three-month periods ended March 31, 2017 and 2016 and its cash flows for the three-month periods ended March 31, 2017 and 2016 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 2016 Annual Report on Form 10-K filed with the SEC on March 1, 2017.

The Company's Annual Report on Form 10-K for the year ended December 31, 2016 contains a discussion of our significant accounting policies under Note 2, "Summary of Significant Accounting Policies". There have been no significant changes in our significant accounting policies since December 31, 2016. Management discusses our significant accounting policies and management’s judgments and estimates with the Company's Audit Committee.

Reclassifications

During the first quarter of 2017, the Company adopted ASU 2016-09, Improvements to Employee Share-Based Payment Accounting (“ASU 2016-09”), which requires the Company to reclassify employer tax payments on account of employee tax withholdings on share-based awards from operating activities to financing activities.  Prior to the issuance of ASU 2016-09, there was no guidance on

18

the classification of cash paid by an employer to the taxing authorities when directly withholding shares for tax withholding purposes. As a result of the adoption, a $0.3 million cash outflow has been reclassified in the March 31, 2016 consolidated statements of cash flows from operating activities to financing activities. There was no other impact from the adoption of this guidance.

During the quarter ended December 31, 2016, the Company early adopted ASU 2016-15, “Classification of Certain Cash Receipts and Cash Payments” (“ASU 2016-15”), which clarifies that debt prepayment costs should be presented as financing activities in the statement of cash flows. As a result of the adoption, $53.4 million was reclassified in the consolidated statements of cash flows from the operating activities section to the financing activities section of the consolidated statements of cash flows, within the “Repayment of mortgage notes payable” caption, for the three-months period ended March 31, 2016. There was no other impact from the adoption of this guidance.

Recent Accounting Pronouncements

On February 22, 2017, the FASB issued ASU No. 2017-05 (“ASU 2017-05) to provide guidance for recognizing gains and losses from the transfer of nonfinancial assets and in-substance non-financial assets in contracts with non-customers, unless other specific guidance applies. The standard requires a company to derecognize nonfinancial assets once it transfers control of a distinct nonfinancial asset or distinct in substance nonfinancial asset. Additionally, when a company transfers its controlling interest in a nonfinancial asset, but retains a noncontrolling ownership interest, the company is required to measure any non-controlling interest it receives or retains at fair value. The guidance requires companies to recognize a full gain or loss on the transaction. As a result of the new guidance, the guidance specific to real estate sales in ASC 360-20 will be eliminated. As such, sales and partial sales of real estate assets will now be subject to the same derecognition model as all other nonfinancial assets. The guidance is effective for annual periods beginning after December 15, 2017, including interim periods within that reporting period. The effective date of this guidance coincides with revenue recognition guidance. The Company is in the process of evaluating the impact of this new guidance and on its consolidated financial statements. The Company expects to utilize the modified retrospective approach.

On January 5, 2017, the FASB issued ASU No. 2017-01 (“ASU 2017-01”) to amend the guidance for determining whether a transaction involves the purchase or disposal of a business or an asset. The amendments clarify that when substantially all of the fair value of the gross assets acquired or disposed of is concentrated in a single identifiable asset or a group of similar assets, the set of assets and activities is not a business. ASU 2017-01 is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years and early adoption is permitted for transactions which have not been previously reported in financial statements that have been issued. The Company adopted the guidance on the issuance date effective January 2017. The Company expects that most of its real estate acquisitions will be considered asset acquisitions under the new guidance and that transaction costs will be capitalized to the investment basis which is then subject to a purchase price allocation based on relative fair value.

3. REAL ESTATE INVESTMENTS

As of March 31, 2017 and December 31, 2016, the gross carrying value of the Properties was as follows (in thousands):

	March 31,		December 31,
	2017		2016
Land	$	462,014	$	469,522
Building and improvements		2,801,495		2,683,087
Tenant improvements		438,695		433,686
Operating properties		3,702,204		3,586,295
Assets held for sale - real estate investments (a)		5,576		73,591
Total	$	3,707,780	$	3,659,886

19

(a) Real estate investments related to assets held for sale above represents gross real estate assets and does not include accumulated depreciation or other assets on the balance sheet of the property held for sale. See “Held for Sale” below in this Note 3.

Dispositions

The Company sold the following eight office properties and one mixed-use property during the three-month period ended March 31, 2017 (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)
March 30, 2017	200, 210 & 220 Lake Drive East (Woodland Falls)	Cherry Hill, NJ	3		215,465	$	19,000	$	17,771	$	(249	)	(b)
March 15, 2017	Philadelphia Marine Center (Marine Piers)	Philadelphia, PA	1		181,900		21,400		11,182		6,498		(c)
March 13, 2017	11700, 11710, 11720 & 11740 Beltsville Drive (Calverton)	Beltsville, MD	3		313,810		9,000		8,354		-		(d)
February 2, 2017	1200 & 1220 Concord Avenue (Concord Airport Plaza)	Concord, CA	2		350,256		33,100		32,010		551		(e)
Total Dispositions			9		1,061,431	$	82,500	$	69,317	$	6,800

(a) Gain/(Loss) on Sale is net of closing and other transaction related costs.

(b) During the fourth quarter of 2016, the Company recognized a $7.3 million impairment related to these properties.

(c) On March 15, 2017, the Company sold its sublease interest in the Piers at Penn’s Landing (the “Marine Piers”), which includes leasehold improvements containing 181,900 net rentable square feet, and a marina, located in Philadelphia, Pennsylvania for a sales price of $21.4 million, which will be paid in two installments. On the closing date, the buyer paid $12.0 million in cash. On the second purchase price installment date, the buyer will pay $9.4 million. The second purchase price installment is due on (a) January 31, 2020, in the event that the tenant at the Marine Piers does not exercise its existing option to extend the term of the sublease or (b) January 15, 2024, in the event that the tenant does exercise its current extension option to extend the term of the sublease. In accordance with ASC 360-20, Real Estate Sales, the Company determined that it is appropriate to account for the sales transaction under the cost recovery method. The Company received cash proceeds of $11.2 million, after closing costs and prorations, and the net book value of the Marine Piers was $4.7 million, resulting in a gain on sale of $6.5 million. The remaining gain on sale of $9.4 million will be recognized on the second purchase price installment date. The Marine Piers was classified as mixed-use within our property count.

(d) During the fourth quarter of 2016, the Company recognized a $3.0 million impairment related to these properties. During the first quarter of 2017, there was a price reduction of $1.7 million under the agreement of sale and an additional impairment of $1.7 million was recognized.

(e) This sale is designated as a like-kind exchange under Section 1031 of the Internal Revenue Code (“IRC”) and, as such, the proceeds, totaling $32.0 million after closing costs and prorations, were deposited with a Qualified Intermediary, as defined under the IRC. The proceeds received at closing were recorded as “Other assets” in the Company’s consolidated balance sheet as of March 31, 2017. During the fourth quarter of 2016, the Company recognized a $11.5 million impairment related to these properties.

In addition to the amounts in the table above, the Company recorded $0.5 million gain during the first quarter of 2017 from the receipt of additional cash from the disposition of Cira Square during 2016. For further information relating to this sale, see Note 3, “Real Estate Investments,” in the notes to the audited financial statements included in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2016.

The Company sold the following land parcels during the three-month period ended March 31, 2017 (dollars in thousands):

Disposition Date	Property/Portfolio Name	Location	Number of Parcels		Acres		Sales Price		Net Proceeds on Sale		Gain on Sale
February 15, 2017	Gateway Land C	Richmond, VA		1		4.8	$	1,100	$	1,043	$	-	(a)
January 30, 2017	Garza Ranch	Austin, TX		1		1.7		3,500		3,277		-	(b)
Total Dispositions				2		6.5	$	4,600	$	4,320	$	-

(a) During the fourth quarter of 2016, the Company recognized a nominal impairment related to this land parcel.

(b) The Company has a continuing involvement through a completion guaranty, which requires the Company as developer to complete certain infrastructure improvements on behalf of the buyers of the land parcels. The cash received at settlement was recorded as “Deferred income, gains and rent” on the Company’s consolidated balance sheet and the Company will recognize the

20

sale once the infrastructure improvements are complete. See Item 2., “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Contractual Obligations” for further discussion of the infrastructure improvements.

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. Accordingly, the operating results of these properties remain classified within continuing operations for all periods presented.

Held for Sale

The following is a summary of one property classified as held for sale but which did not meet the criteria to be classified within discontinued operations at March 31, 2017 (in thousands):

	Held for Sale Property Included in Continuing Operations
	March 31, 2017
	Other Segment - Retail
ASSETS HELD FOR SALE
Real estate investments:
Operating properties	$	5,576
Accumulated depreciation		(79	)
Operating real estate investments, net		5,497
Land held for development		-
Total real estate investments, net		5,497
Other assets		765
Total assets held for sale, net	$	6,262
LIABILITIES HELD FOR SALE
Other liabilities	$	387
Total liabilities held for sale	$	387

As the fair value less anticipated costs to sell exceeded the carrying value for the property included in the above table, no provision for impairment was recorded. The fair value measurement is based on pricing in the purchase and sale agreement for the property. As the pricing in the purchase and sale agreement is unobservable, the Company determined that the input utilized to determine fair value for the property falls within Level 3 in accordance with the fair value hierarchy established by Accounting Standards Codification (ASC) Topic 820, “Fair Value Measurements and Disclosures”.

The sale of the held for sale property does not represent a strategic shift that has a major effect on the Company's operations and financial results. As a result, the operating results of the property remains classified within continuing operations for all periods presented.

Held for Use Impairment

As of March 31, 2017, the Company evaluated the recoverability of the carrying value of its properties that triggered assessment under the undiscounted cash flow model. Based on the Company’s evaluation, it was determined that due to the reduction in the Company’s intended hold period of four properties located in the Other segment, the Company would not recover the carrying values of these properties. Accordingly, the Company recorded impairment charges on these properties of $1.0 million at March 31, 2017, reducing the aggregate carrying values of the properties from $10.2 million to their estimated fair value of $9.2 million. The Company measured these impairments based on a discounted cash flow analysis, using a hold period of 10 years and residual capitalization rates and discount rates of 9.00% and 9.25%, respectively. The results were comparable to indicative pricing in the market. The assumptions used to determine fair value under the income approach are Level 3 inputs in accordance with the fair value hierarchy established by Accounting Standards Codification (ASC) Topic 820, “Fair Value Measurements and Disclosures.”

4. INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES

As of March 31, 2017, the Company held ownership interests in 13 unconsolidated Real Estate Ventures for an aggregate investment balance of $264.9 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, 2017, seven of the real estate ventures owned properties that contain an aggregate of approximately 8.0 million net rentable square feet of office space; two real estate ventures owned 4.3 acres of undeveloped parcels of land; two real estate ventures owned 1.4 acres of land under active development and two real estate ventures owned residential towers that contain 345 and 321 apartment units, respectively.

21

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 in each of the three-month periods ended March 31, 2017 and 2016. The Company has outstanding accounts receivable balances from its Real Estate Ventures of $1.6 million and $1.4 million as of March 31, 2017 and December 31, 2016, 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 in which the Company held interests as of March 31, 2017 and December 31, 2016 (in thousands):

	March 31, 2017		December 31, 2016
Net property	$	1,405,986	$	1,483,067
Other assets		210,032		231,972
Other liabilities		107,161		129,486
Debt, net		946,891		989,738
Equity		561,966		595,815
Company’s share of equity (Company’s basis) (a)	$	264,941	$	281,331

(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.

The following is a summary of results of operations of the Real Estate Ventures in which the Company held interests during the three-month periods ended March 31, 2017 and 2016 (in thousands):

	Three-month periods ended March 31,
	2017			2016
Revenue	$	54,279		$	46,525
Operating expenses		(25,166	)		(26,668	)
Interest expense, net		(10,830	)		(8,989	)
Depreciation and amortization		(20,761	)		(20,160	)
Net loss (a)	$	(2,478	)	$	(9,292	)
Equity in loss of Real Estate Ventures	$	(748	)	$	(403	)

(a) The three-month period ended March 31, 2016 amount includes $6.4 million of acquisition deal costs related to the formation of the MAP Venture during the three-month period ended March 31, 2016.

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The Parc at Plymouth Meeting Venture

On January 31, 2017, the Company sold its 50% interest in TB-BDN Plymouth Apartments, L.P., a 50/50 real estate venture with Toll Brothers, at a gross sales value of $100.5 million, of which the Company was allocated 50% for its interest.  The venture developed and operates a 398-unit multi-family complex in Plymouth Meeting, Pennsylvania encumbered by a $54.0 million construction loan. The construction loan was repaid commensurate with the sale of the Company’s 50% interest. As a result, the Company is no longer subject to a $3.2 million payment guarantee on the construction loan. The cash proceeds, after the payment of the Company’s share of the debt and closing costs, were $27.2 million.  The carrying amount of the Company’s investment at the time of sale was $12.6 million, resulting in a $14.6 million gain on sale of interest in the real estate venture.

Guarantees

As of March 31, 2017, the Company’s unconsolidated real estate ventures had aggregate indebtedness to third parties of $953.8 million.  These loans are generally mortgage or construction loans, most of which are non-recourse to the Company.  As of March 31, 2017, the loans for which there is recourse to the Company consists of the following: (i) a $55.4 million payment guaranty on the term loan for evo at Cira; (ii) a joint and several cost overrun guaranty on the $88.9 million construction loan for the development project being undertaken by 1919 Market Street LP; and (iii) a $0.4 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, included their indebtedness, see Note 4, "Investment in Unconsolidated Real Estate Ventures," in the notes to the audited financial statements included in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2016.

5. INTANGIBLE ASSETS AND LIABILITIES

As of March 31, 2017 and December 31, 2016, the Company’s intangible assets/liabilities were comprised of the following (in thousands):

	March 31, 2017
	Total Cost		Accumulated Amortization			Intangible Assets, net
Intangible assets, net:
In-place lease value	$	114,196	$	(54,834	)	$	59,362
Tenant relationship value		13,036		(10,378	)		2,658
Above market leases acquired		4,703		(2,501	)		2,202
Total intangible assets, net	$	131,935	$	(67,713	)	$	64,222
Acquired lease intangibles, net:
Below market leases acquired	$	30,683	$	(14,079	)	$	16,604

	December 31, 2016
	Total Cost		Accumulated Amortization			Intangible Assets, net
Intangible assets, net:
In-place lease value	$	142,889	$	(75,696	)	$	67,193
Tenant relationship value		13,074		(10,167	)		2,907
Above market leases acquired		4,718		(2,340	)		2,378
Total intangible assets, net	$	160,681	$	(88,203	)	$	72,478
Acquired lease intangibles, net:
Below market leases acquired	$	37,579	$	(19,460	)	$	18,119

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As of March 31, 2017, the Company’s annual amortization for its intangible assets/liabilities, assuming no prospective early lease terminations, are as follows (dollars in thousands):

	Assets		Liabilities
2017 (nine months remaining)	$	11,409	$	1,809
2018		11,754		2,196
2019		10,536		1,885
2020		8,457		1,337
2021		5,971		807
Thereafter		16,095		8,570
Total	$	64,222	$	16,604

6. DEBT OBLIGATIONS

The following table sets forth information regarding the Company’s consolidated debt obligations outstanding at March 31, 2017 and December 31, 2016 (in thousands):

	March 31, 2017			December 31, 2016			Effective Interest Rate				Maturity Date
MORTGAGE DEBT:
Two Logan Square	$	85,625		$	86,012			3.98	%		May 2020
One Commerce Square		126,198			127,026			3.64	%	(a)	Apr 2023
Two Commerce Square		112,000			112,000			4.51	%	(b)	Apr 2023
Principal balance outstanding		323,823			325,038
Plus: fair market value premium (discount), net		(2,652	)		(2,761	)
Less: deferred financing costs		(687	)		(728	)
Mortgage indebtedness	$	320,484		$	321,549
UNSECURED DEBT
Seven-Year Term Loan - Swapped to fixed	$	250,000		$	250,000			3.72	%		Oct 2022
$300.0M 5.70% Guaranteed Notes due 2017		300,000			300,000			5.68	%		May 2017
$325.0M 4.95% Guaranteed Notes due 2018		325,000			325,000			5.13	%		Apr 2018
$250.0M 3.95% Guaranteed Notes due 2023		250,000			250,000			4.02	%		Feb 2023
$250.0M 4.10% Guaranteed Notes due 2024		250,000			250,000			4.33	%		Oct 2024
$250.0M 4.55% Guaranteed Notes due 2029		250,000			250,000			4.60	%		Oct 2029
Indenture IA (Preferred Trust I)		27,062			27,062			2.75	%		Mar 2035
Indenture IB (Preferred Trust I)		25,774			25,774			3.30	%		Apr 2035
Indenture II (Preferred Trust II)		25,774			25,774			3.09	%		Jul 2035
Principal balance outstanding		1,703,610			1,703,610
Plus: original issue premium (discount), net		(4,424	)		(4,678	)
Less: deferred financing costs		(6,999	)		(7,369	)
Total unsecured indebtedness	$	1,692,187		$	1,691,563
Total Debt Obligations	$	2,012,671		$	2,013,112

(a) This loan was assumed upon acquisition of the related properties on December 19, 2013. On December 29, 2015, the Company refinanced the debt increasing the principal balance to $130.0 million and extended the term of the scheduled maturity from January 6, 2016 to April 5, 2023.  The effective interest rate as of December 31, 2015 was 3.64%.  A default under this loan will also constitute a default under the loan outstanding on Two Commerce Square. This loan is also secured by a lien on Two Commerce Square.

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(b) This loan was assumed upon acquisition of the related property on December 19, 2013. The interest rate reflects the market rate at the time of acquisition. A default under this loan will also constitute a default under the loan outstanding on One Commerce Square. This loan is also secured by a lien on One Commerce Square.

As of March 31, 2017 and December 31, 2016,the Company’s weighted-average effective interest rates on its mortgage notes payable were both 4.03%. As of March 31, 2017 and December 31, 2016, the net carrying value of the Company’s Properties that are encumbered by mortgage indebtedness was $323.8 million and $325.0 million, respectively.

On May 15, 2015, the Company closed on a new four-year unsecured revolving credit facility that provides for borrowings of up to $600.0 million. The Company had no borrowings under its unsecured revolving credit facility as of and during either of the three-month periods ended March 31, 2017 and March 31, 2016.

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, 2017. Management continuously monitors the Company’s compliance with and anticipated compliance with the covenants. Certain of the covenants restrict the Company’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.

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, 2017 and December 31, 2016, 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, 2017 and December 31, 2016 approximate the fair values for cash and cash equivalents, accounts receivable, other assets (except for the note receivable disclosed below), 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, 2017				December 31, 2016
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Unsecured notes payable	$	1,365,398	$	1,381,975	$	1,364,854	$	1,372,758
Variable rate debt	$	326,789	$	307,917	$	326,709	$	307,510
Mortgage notes payable	$	320,484	$	327,144	$	321,549	$	328,853
Note receivable (a)	$	3,401	$	3,918	$	3,380	$	3,717

(a) The inputs to originate the loan are unobservable and, as a result, are categorized as Level 3. The Company determined fair value by calculating the present value of the cash payments to be received through the maturity date of the loan. See Note 2, “Summary of Significant Accounting Policies,” to the Company’s 2016 Annual Report on Form 10-K for the year ended December 31, 2016 for further information regarding the note origination.  

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The inputs utilized to determine the fair value of the Company’s unsecured notes payable are categorized as Level 2. This is because the Company valued these instruments using quoted market prices as of March 31, 2017 and December 31, 2016.  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 inputs utilized to determine the fair value of the Company’s mortgage notes payable and variable rate debt are categorized as Level 3.  The fair value of the variable rate debt was 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 inputs 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 to calculate fair value as of March 31, 2017 and December 31, 2016 was 4.507% and 4.353%, 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, 2017 and December 31, 2016.  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, 2017, and current estimates of fair value may differ from the amounts presented herein.

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 was $14.9 million at each of March 31, 2017 and December 31, 2016, 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, 2017 and December 31, 2016 was approximately $24.0 million and $24.4 million, respectively.

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, 2017 and December 31, 2016. 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 assets and other liabilities on the Company’s consolidated balance sheets).

Hedge Product	Hedge Type	Designation		Notional Amount				Strike			Trade Date	Maturity Date	Fair value
				3/31/2017		12/31/2016							3/31/2017			12/31/2016
Assets
Swap	Interest Rate	Cash Flow	(a)	$	250,000	$	250,000		3.718	%	October 8, 2015	October 8, 2022	$	4,572		$	3,733
Liabilities
Swap	Interest Rate	Cash Flow	(a)		25,774		25,774		3.300	%	December 22, 2011	January 30, 2021		(169	)		(300	)
Swap	Interest Rate	Cash Flow	(a)		25,774		25,774		3.090	%	January 6, 2012	October 30, 2019		(93	)		(214	)
Swap	Interest Rate	Cash Flow	(a)		27,062		27,062		2.750	%	December 21, 2011	September 30, 2017		(37	)		(83	)
				$	328,610	$	328,610

(a) Hedging unsecured variable rate debt.  

The Company measures its derivative instruments at fair value and records them gross in the consolidated balance sheet in other assets or other liabilities. Additionally, the Company recorded its share of the fair value of derivative financial instruments held by its unconsolidated real estate ventures, as of March 31, 2017.

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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.

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-month periods ended March 31,
	2017						2016
	Basic			Diluted			Basic			Diluted
Numerator
Income from continuing operations	$	21,271		$	21,271		$	46,310		$	46,310
Net income from continuing operations attributable to non-controlling interests		(169	)		(169	)		(389	)		(389	)
Nonforfeitable dividends allocated to unvested restricted shareholders		(99	)		(99	)		(105	)		(105	)
Preferred share dividends		(1,725	)		(1,725	)		(1,725	)		(1,725	)
Net income attributable to common shareholders	$	19,278		$	19,278		$	44,091		$	44,091
Denominator
Weighted-average shares outstanding		175,176,964			175,176,964			174,788,945			174,788,945
Contingent securities/Share based compensation		-			1,024,908			-			682,468
Weighted-average shares outstanding		175,176,964			176,201,872			174,788,945			175,471,413
Earnings per Common Share:
Net income attributable to common shareholders	$	0.11		$	0.11		$	0.25		$	0.25

Redeemable common limited partnership units totaling 1,479,799 and 1,535,102 in March 31, 2017 and March 31, 2016, respectively, 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, 2017 and 2016, 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 1, 2017, the Parent Company declared a distribution of $0.16 per common share, totaling $28.3 million, which was paid on April 19, 2017 to shareholders of record as of April 5, 2017. In addition, the Parent Company declared distributions on its 6.90% Series E Cumulative Redeemable Preferred Shares (NYSE: BDN-PE) (the “Series E Preferred Shares”) to holders of record as of March 30, 2017. 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 17, 2017 to holders of Series E Preferred Shares totaled $1.7 million.

On March 10, 2017, the Parent Company announced its intention to redeem all of its outstanding 4,000,000 Series E Preferred Shares on April 11, 2017. The Series E Preferred Shares were redeemed in full on April 11, 2017 at a redemption price of $25.00 per share with cash from existing cash balances on hand. See Note 15, “Subsequent Events.”

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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-month periods ended March 31,
	2017						2016
	Basic			Diluted			Basic			Diluted
Numerator
Income from continuing operations	$	21,271		$	21,271		$	46,310		$	46,310
Nonforfeitable dividends allocated to unvested restricted unitholders		(99	)		(99	)		(105	)		(105	)
Preferred unit dividends		(1,725	)		(1,725	)		(1,725	)		(1,725	)
Net income attributable to non-controlling interests		(5	)		(5	)		(2	)		(2	)
Net income attributable to common unitholders	$	19,442		$	19,442		$	44,478		$	44,478
Denominator
Weighted-average units outstanding		176,656,763			176,656,763			176,324,047			176,324,047
Contingent securities/Share based compensation		-			1,024,908			-			682,468
Total weighted-average units outstanding		176,656,763			177,681,671			176,324,047			177,006,515
Earnings per Common Partnership Unit:
Net income attributable to common unitholders	$	0.11		$	0.11		$	0.25		$	0.25

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, 2017 and 2016, earnings representing nonforfeitable dividends as noted in the table above were allocated to the unvested restricted units issued to the Parent Company in connection with awards 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 1, 2017, the Operating Partnership declared a distribution of $0.16 per common partnership unit, totaling $28.3 million, which was paid on April 19, 2017 to unitholders of record as of April 5, 2017. In addition, the Operating Partnership declared distributions on its Series E-Linked Preferred Mirror Units to holders of record as of March 30, 2017. 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 17, 2017 to holders of Series E-Linked Preferred Mirror Units totaled $1.7 million.

On March 10, 2017, the Parent Company announced its intention to redeem all of its outstanding 4,000,000 Series E Preferred Shares on April 11, 2017. In connection with the redemption, on April 11, 2017, the Operating Partnership redeemed all of its Series E-Linked Preferred Mirror Units at a redemption price of $25.00 per unit with cash from existing cash balances on hand. See Note 15, “Subsequent Events.”

12. SHARE BASED COMPENSATION, 401(k) PLAN AND DEFERRED COMPENSATION

Restricted Share Awards

As of March 31, 2017, 618,961 restricted shares were outstanding under the Equity Incentive Plan and vest over three years from the initial grant dates. The remaining compensation expense to be recognized at March 31, 2017 was approximately $2.9 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, 2017 and 2016, the Company recognized compensation expense related to outstanding restricted shares of $1.5 million and $1.2 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.

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The following table summarizes the Company’s restricted share activity during the three months ended March 31, 2017:

	Shares			Weighted Average Grant Date Fair Value		Aggregate Intrinsic Value
Non-vested at January 1, 2017		488,604		$	14.10	$	8,066,852
Granted		141,751			16.68		2,364,127
Vested		(9,394	)		14.90		153,216
Forfeited		(2,000	)		13.58
Non-vested at March 31, 2017		618,961		$	14.68	$	10,045,737

On March 1, 2017, the Compensation Committee of the Parent Company’s Board of Trustees awarded to officers of the Company an aggregate 109,629 restricted common shares, which cliff vest on April 15, 2020. In addition, on March 7, 2017, the Compensation Committee awarded non-officer employees an aggregate 32,122 restricted common shares, which vest in two equal annual installments on April 15 of 2018 and 2019. 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 the Company’s President and Chief Executive Officer, vesting would also accelerate if the Company were to terminate him without cause, or if he were to resign for good reason under his employment agreement. In addition, if the Company 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 share-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 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
	2/23/2015		2/22/2016		3/1/2017		Total
(Amounts below in shares, unless otherwise noted)
Non-vested at January 1, 2017		147,589		231,388		-		378,977
Units Granted		-		-		174,854		174,854
Units Cancelled		-		-		-		-
Non-vested at March 31, 2017		147,589		231,388		174,854		553,831
Measurement Period Commencement Date	1/1/2015		1/1/2016		1/1/2017
Measurement Period End Date	12/31/2017		12/31/2018		12/31/2019
Units Granted		186,395		231,388		174,854
Fair Value of Units on Grant Date (in thousands)	$	3,933	$	3,558	$	3,735

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 share-based compensation, the Company amortizes stock-based compensation costs through the qualifying retirement date for those executives who meet the conditions for qualifying retirement during the schedule vesting period.

For the three months ended March 31, 2017, the Company recognized total compensation expense for the 2017, 2016 and 2015 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.  For the three months ended March 31, 2016, the Company recognized total compensation expense for the

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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.

The remaining compensation expense to be recognized at March 31, 2017 was approximately $2.9 million, and is expected to be recognized over a weighted average remaining vesting period of 1.9 years.

The Company issued 55,299 common shares on February 1, 2017 in settlement of RPSUs that had been awarded on March 11, 2014 and 12, 2014 (with a three-year measurement period ended December 31, 2016). Holders of these RPSUs also received a cash dividend of $0.16 per share for these common shares on February 6, 2017.

13. SEGMENT INFORMATION

As of March 31, 2017, the Company managed its portfolio within five segments: (1) Philadelphia Central Business District (CBD), (2) Pennsylvania Suburbs, (3) Metropolitan Washington, D.C., (4) Austin, Texas and (5) Other. The Philadelphia CBD segment includes properties located in the City of Philadelphia in Pennsylvania. The Pennsylvania Suburbs segment includes properties in Chester, Delaware, and Montgomery counties in the Philadelphia suburbs. 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 Other segment includes properties located in New Jersey/Delaware. On February 2, 2017, the Company sold its last two remaining properties located in California, which were previously included in the Other segment. See Note 3, “Real Estate Investments,” for further information. 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, 2017		December 31, 2016
Philadelphia CBD	$	1,471,258	$	1,320,974
Pennsylvania Suburbs		1,006,780		1,005,446
Metropolitan Washington, D.C.		974,838		975,987
Austin, Texas		146,858		146,794
Other		102,470		137,094
	$	3,702,204	$	3,586,295
Assets held for sale (a)		5,576		73,591
Operating Properties	$	3,707,780	$	3,659,886
Corporate
Construction-in-progress	$	166,372	$	297,462
Land held for development	$	153,268	$	150,970

(a)  As of March 31, 2017, the Company categorized a retail property located in the Other segment as held for sale in accordance with applicable accounting standards for long lived assets. See Note 3, “Real Estate Investments,” for further information.

None of the above aforementioned sales or properties classified as held for sale are considered significant dispositions under the accounting guidance for discontinued operations.

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Net operating income (in thousands):

	Three-month periods ended
	March 31,
	2017							2016
	Total revenue		Operating expenses (a)			Net operating income		Total revenue		Operating expenses (a)			Net operating income
Philadelphia CBD	$	54,449	$	(20,837	)	$	33,612	$	49,670	$	(19,256	)	$	30,414
Pennsylvania Suburbs		35,655		(12,584	)		23,071		37,106		(13,155	)		23,951
Metropolitan Washington, D.C.		23,362		(9,383	)		13,979		27,339		(10,899	)		16,440
Austin, Texas		9,123		(3,573	)		5,550		8,547		(3,255	)		5,292
Other		6,362		(3,856	)		2,506		12,740		(7,602	)		5,138
Corporate		1,969		(848	)		1,121		1,100		(608	)		492
Operating Properties	$	130,920	$	(51,081	)	$	79,839	$	136,502	$	(54,775	)	$	81,727

(a) Includes property operating expense, real estate taxes and third party management expense.

Unconsolidated real estate ventures (in thousands):
	Investment in real estate ventures, at equity				Equity in loss of real estate ventures
	As of				Three-month periods ended March 31,
	March 31, 2017		December 31, 2016		2017			2016
Philadelphia CBD	$	44,618	$	48,691	$	(67	)	$	455
Pennsylvania Suburbs		3,147		15,421		276			265
Metropolitan Washington, D.C.		143,591		141,786		467			(448	)
MAP Venture (a)		17,776		20,893		(1,117	)		(556	)
Other		1,713		1,654		58			161
Austin, Texas		54,096		52,886		(365	)		(280	)
Total	$	264,941	$	281,331	$	(748	)	$	(403	)

(a) 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. The MAP Venture’s business operations, including properties in Richmond, Virginia; Metropolitan Washington, D.C.; 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.

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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. Property operating expenses that are included in determining NOI consist of costs that are necessary and allocable to our operating properties such as utilities, property-level salaries, repairs and maintenance, property insurance, management fees and bad debt expense. General and administrative expenses that are not reflected in NOI primarily consist of corporate-level salaries, amortization of share awards and professional fees that are incurred as part of corporate office management. 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 believes NOI provides useful information to investors regarding the financial condition and results of operations because it reflects only those income and expense items that are incurred at the property level. While NOI is a relevant and widely used measure of operating performance of real estate investment trusts, it does not represent cash flow from operations or net income as defined by GAAP and should not be considered as an alternative to those measures in evaluating our liquidity or operating performance. NOI does not reflect interest expenses, real estate impairment losses, depreciation and amortization costs, capital expenditures and leasing costs. The Companybelieves 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-month periods ended March 31,
	2017			2016
Consolidated net operating income	$	79,839		$	81,727
Less:
Interest expense		(21,437	)		(23,691	)
Interest expense - amortization of deferred financing costs		(634	)		(774	)
Interest expense - financing obligation		-			(281	)
Depreciation and amortization		(45,892	)		(48,873	)
General and administrative expenses		(9,425	)		(9,120	)
Equity in loss of Real Estate Ventures		(748	)		(403	)
Provision for impairment		(2,730	)		(7,390	)
Loss on early extinguishment of debt		-			(66,590	)
Plus:
Interest income		393			320
Net gain on disposition of real estate		7,323			115,456
Net gain on Real Estate Venture transactions		14,582			5,929
Net income	$	21,271		$	46,310

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 may be required to fund required leasing and capital reserve accounts for the benefit of the mortgage lenders with a letter-of-credit.  As of March 31, 2017, there is an associated $10.0 million letter of credit for a mortgage lender. 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

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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 4 to 72 years. Minimum future rental payments on non-cancelable leases at March 31, 2017 are as follows (in thousands):

Year	Minimum Rent
2017 (nine months remaining)	$	904
2018		1,205
2019		1,205
2020		1,205
2021		1,205
Thereafter		57,208
Total	$	62,932

The Company obtained ground tenancy rights related to three 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, 2016 for further detail regarding commitments and contingencies.

Put Agreement

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, 2017, the liability had accreted to $1.8 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, 2017, the Company’s unconsolidated real estate ventures had aggregate indebtedness to third parties of $953.8 million. These loans are generally mortgage or construction loans, most of which are non-recourse to the Company.  In addition, in certain instances, the Company provides non-recourse carve-out guarantees on these non-recourse loans. As of March 31, 2017, the loans for which there is recourse to the Company consists of the following: (i) a $55.4 million payment guaranty on the term loan for evo at Cira; (ii) a several cost overrun guaranty on the $88.9 million construction loan for the development project being undertaken by 1919 Market Street LP; and (ii) a $0.4 million payment guarantee on a loan provided to PJP VII. See Note 4, "Investment in Unconsolidated Real Estate Ventures," in the notes to the consolidated financial statements above for more information.

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Other Commitments or Contingencies

On July 1, 2016, the Company closed on the acquisition of 34.6 acres of land located in Austin, Texas known as the Garza Ranch. As of March 31, 2017, Company is under agreement to sell 8.4 acres and has sold 1.7 acres (of the 34.6 acres) to two unaffiliated third parties. In connection with the agreements of sale, the Company entered into a development agreement and related completion guarantee to construct certain infrastructure improvements to the land on behalf of each buyer, estimated to cost $13.6 million. Total estimated costs related to the improvements are included in the sale price of each land parcel. Recognition of the sale of the land parcels is deferred until the improvements are completed.

On December 3, 2015, the Company entered into an agreement as development manager to construct Subaru of America’s (“Subaru”) corporate headquarters in Camden, New Jersey. The agreement provides the Company with the ability to earn additional profit if total project costs are less than the not-to-exceed (“NTE”) amount.  The NTE amount, currently at $78.1 million, may be adjusted by change orders agreed upon by both Subaru and the Company.  If construction costs are in excess of the NTE amount, the Company is obligated to pay such cost overruns. The terms of the guarantee do not provide a limitation on the costs the Company may be responsible for. As of March 31, 2017, the Company does not expect to incur costs in excess of the NTE amount.

Also on December 3, 2015, the Company entered into an agreement to construct an 83,000 square foot build-to-suit service center (the “Subaru NSTC Development”) on land parcels owned by the Company for Subaru as the single tenant. On such date, Subaru entered into an 18-year lease for the service center. The lease contains a purchase option, which allows Subaru to purchase the property at commencement of the lease, or five years subsequent to inception, at depreciated cost. The Company currently expects to deliver the building during the second quarter of 2018.  At March 31, 2017, $10.8 million of the project costs, totaling $44.3 million, had been funded.

The Company invests in its properties and regularly incurs capital expenditures in the ordinary course of business to maintain the properties. The Company believes that such expenditures enhance its competitiveness. The Company also enters into construction, utility and service contracts in the ordinary course of business which may extend beyond one year. These contracts typically provide for cancellation with insignificant or no cancellation penalties.

15. SUBSEQUENT EVENTS

Preferred Share Redemption

On April 11, 2017 (the “Redemption Date”), the Parent Company completed the previously announced redemption of all of its outstanding 4,000,000 Series E Preferred Shares at a redemption price of $25.00 per share (the “Redemption Price”). On April 17, 2017 (the “Distribution Payment Date”), the Parent Company paid each holder of record of Series E Preferred Shares on March 30, 2017 all accrued and unpaid distributions on the Series E Preferred Shares up to, but not including the Distribution Payment Date, which represents an amount equal to $0.50792 per share (the “Distribution”). From and after the Distribution Payment Date, distributions ceased to accrue, and on and after the Distribution Payment Date, the only remaining right of holders of the Series E Preferred Shares is the right to receive payment of the Redemption Price and Distribution. Following the redemption, the Series E Preferred Shares were delisted from the New York Stock Exchange. The Redemption Price together with the Distribution amounting to $102.0 million was paid by the Parent Company to the Depository Trust Company on April 11, 2017 from available cash balances on hand. On the Redemption Date, the Company recognized a preferred share redemption charge of $3.2 million related to the original issuance costs.

In connection with this redemption, the Operating Partnership redeemed all of its 4,000,000 outstanding Series E-Linked Preferred Mirror Units.

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Item 2.Management’s Discussion and Analysis of Financial Condition and Results of Operations

The Private Securities Litigation Reform Act of 1995 (the “1995 Act”) provides a “safe harbor” for forward-looking statements. This Quarterly Report on Form 10-Q and other materials filed by us with the SEC (as well as information included in oral or other written statements made by us) contain statements that are forward-looking, including statements relating to business and real estate development activities, acquisitions, dispositions, future capital expenditures, financing sources, governmental regulation (including environmental regulation) and competition. We intend such forward-looking statements to be covered by the safe-harbor provisions of the 1995 Act. The words “anticipate,” “believe,” “estimate,” “expect,” “intend,” “will,” “should” and similar expressions, as they relate to us, are intended to identify forward-looking statements. Although we believe that the expectations reflected in such forward-looking statements are based on reasonable assumptions, we can give no assurance that our expectations will be achieved. As forward-looking statements, these statements involve important risks, uncertainties and other factors that could cause actual results to differ materially from the expected results and, accordingly, such results may differ from those expressed in any forward-looking statements made by us or on our behalf. Factors that could cause actual results to differ materially from our expectations are set forth in our Annual Report under the heading “Forward-Looking Statements” in our Annual Report on Form 10-K for the year ended December 31, 2016.

Given these uncertainties, and the other risks identified in the “Risk Factors ” section of our Annual Report on Form 10-K for the year ended December 31, 2016, we caution readers not to place undue reliance on forward-looking statements. We assume no obligation to update or supplement forward-looking statements that become untrue because of subsequent events.

The discussion that follows is based primarily on our consolidated financial statements as of March 31, 2017 and December 31, 2016 and for the three-month periods ended March 31, 2017 and 2016 and should be read along with the consolidated financial statements and related notes appearing elsewhere in this report. The ability to compare one period to another may be significantly affected by acquisitions completed, development properties placed in service and dispositions made during those periods.

OVERVIEW

As of March 31, 2017, we owned 104 properties that contain an aggregate of approximately 16.5 million net rentable square feet and consist of 90 office properties, six mixed-use properties, one retail property (97 properties, collectively the “Core Properties”), three development properties, three redevelopment properties and one property classified as held for sale (collectively, the “Properties”).  In addition, as of March 31, 2017, we owned economic interests in 13 unconsolidated real estate ventures (collectively, the “Real Estate Ventures”), seven of which own properties that contain an aggregate of approximately 8.0 million net rentable square feet of office space; two of which own 4.3 acres of undeveloped parcels of land; two of which own 1.4 acres of land under active development and two of which own residential towers that contain 345 and 321 apartment units, respectively. As of March 31, 2017, we also owned 312 acres of undeveloped land and held options to purchase approximately 60 additional acres of undeveloped land.  As of March 31, 2017, the total potential development that these land parcels could support, including the parcels under option, under current zoning and entitlements, amounted to an estimated 12.2 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 and Austin, Texas. In addition to managing properties that we own, as of March 31, 2017, we were managing approximately 10.2 million net rentable square feet of office and industrial properties for third parties and Real Estate Ventures.

We conduct our third-party real estate management services business primarily through wholly-owned management company subsidiaries. As of March 31, 2017, the management company subsidiaries were managing properties containing an aggregate of approximately 26.7 million net rentable square feet, of which approximately 16.5 million net rentable square feet related to Properties that we own and consolidate and approximately 10.2 million net rentable square feet related to properties owned by third parties and the Real Estate Ventures.

During the three months ended March 31, 2017, we were managing our portfolio within five markets; (1) Philadelphia Central Business District (“CBD”), (2) Pennsylvania Suburbs, (3) Metropolitan Washington, D.C. (4) Austin, Texas and (5) Other. The Philadelphia CBD segment includes properties located in the City of Philadelphia in Pennsylvania. The Pennsylvania Suburbs segment includes properties in Chester, Delaware and Montgomery counties in the Philadelphia suburbs. The Metropolitan Washington, D.C. segment includes properties in Northern Virginia, Washington, D.C. and southern Maryland. The Austin, Texas segment includes properties in the City of Austin, Texas. The Other segment includes properties in Burlington and Camden counties in New Jersey and properties in New Castle county in the state of Delaware. On February 2, 2017, we sold our last two remaining properties located in California, which was previously included in our Other segment. See Note 3, “Real Estate Investments,” to our Consolidated Financial Statements for further information. Our 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.

We generate cash and revenue from leases of space at our properties and, to a lesser extent, from the management of properties owned by third parties and from investments in the Real Estate Ventures. Factors that we evaluate when leasing space include rental rates, costs of

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tenant improvements, tenant creditworthiness, current and expected operating costs, the length of the lease term, vacancy levels and demand for office space. We also generate cash through sales of assets, including assets that we do not view as part of our Core Properties, either because of location or expected growth potential, and assets that are commanding premium prices from third party investors.

Our financial and operating performance is dependent upon the demand for office and other commercial space in our markets, our leasing results, our acquisition, disposition and development activity, our financing activity, our cash requirements and economic and market conditions, including prevailing interest rates.

Adverse changes in economic conditions could reduce the availability of financing and potentially increase borrowing costs; lead to declines in demands for office and other commercial space and result in rental rate declines; and adversely impact tenant credit quality.

Overall economic conditions, including but not limited to deteriorating financial and credit markets, could have a dampening effect on the fundamentals of our business, including increases in past due accounts, tenant defaults, lower occupancy and reduced effective rents. These conditions would negatively affect our future net income and cash flows and could have a material adverse effect on our financial condition. We believe that the quality of our assets and the strength of our balance sheet will enable us to raise debt capital, if necessary, in various forms and from different sources, including traditional term or secured loans from banks, pension funds and life insurance companies. However, there can be no assurance that we will be able to borrow funds on terms that are economically attractive or at all.

We continue to seek revenue growth throughout our portfolio by increasing occupancy and rental rates. Occupancy at our Core Properties at March 31, 2017 was 93.2% compared to 92.8% at March 31, 2016.

The table below summarizes selected operating and leasing statistics of our wholly owned properties for the three-month periods ended March 31, 2017 and 2016:

	Three Months Ended March 31,
	2017			2016
Leasing Activity
Core Properties (1):
Total net rentable square feet owned		15,033,229			16,956,840
Occupancy percentage (end of period)		93.2	%		92.8	%
Average occupancy percentage		93.2	%		91.9	%
Total Portfolio, less properties in development (2):
Retention rate		46.7	%		51.1	%
New leases and expansions commenced (square feet)		143,884			288,570
Leases renewed (square feet)		83,745			159,535
Net absorption (square feet)		(106,536	)		(116,732	)
Percentage change in rental rates per square feet (3)
New and expansion rental rates		7.4	%		23.2	%
Renewal rental rates		11.1	%		5.7	%
Combined rental rates		9.1	%		13.3	%
Capital Costs Committed (4):
Leasing commissions (per square feet)	$	6.65		$	3.94
Tenant Improvements (per square feet)	$	20.98		$	6.34
Weighted average lease term (years)		6.5			5.5
Total capital per square foot per lease year	$	3.28		$	2.14

(1) Includes all Core Properties and does not include properties under development, redevelopment or held for sale or sold.

(2) Includes leasing related to completed developments and redevelopments, as well as sold properties.

(3) Rental rates include base rent plus reimbursement for operating expenses and real estate taxes.

(4) Calculated on a weighted average basis.

In seeking to increase revenue through our operating, financing and investment activities, we also seek to minimize operating risks, including (i) tenant rollover risk, (ii) tenant credit risk and (iii) development risk.

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Tenant Rollover Risk

We are subject to the risk that tenant leases, upon expiration, will not be renewed, that space may not be relet, or that the terms of renewal or reletting (including the cost of renovations) may be less favorable to us than the current lease terms. Leases that accounted for approximately 3.4% of our aggregate final annualized base rents, which assumes the base rent at the end of the lease term, as of March 31, 2017 (representing approximately 4.5% of the net rentable square feet of the properties) are scheduled to expire without penalty in 2017.  We maintain an active dialogue with our tenants in an effort to maximize lease renewals. For our Core Properties, the retention rate for the three-month period ended March 31, 2017 was 46.7% compared to a retention rate of 51.1% for the three-month period ended March 31, 2016. The lower relative retention for the three-month period primarily resulted from move-outs, primarily in our Pennsylvania Suburbs segment, and early lease terminations, which were spread across our entire portfolio. If we are unable to renew leases or relet space under expiring leases, at anticipated rental rates, or if tenants terminate their leases early, our financial position, net income and cash flow would be adversely impacted.

Tenant Credit Risk

In the event of a tenant default, we may experience delays in enforcing our rights as a landlord and may incur substantial costs in protecting our investment. We regularly evaluate our accounts receivable reserve policy in light of our tenant base and general and local economic conditions. Our accounts receivable allowance was $16.3 million or 9.0% of total receivables (including accrued rent receivables) as of March 31, 2017 compared to $16.1 million or 9.0% of total receivables (including accrued rent receivables) as of December 31, 2016.

If economic conditions deteriorate, we may experience increases in past due accounts, defaults, lower occupancy and reduced effective rents. This condition would negatively affect our future net income and cash flows and could have a material adverse effect on our financial condition.

Development Risk

Development projects are subject to a variety of risks, including construction delays, construction cost overruns, inability to obtain financing on favorable terms, inability to lease space at projected rates, inability to enter into construction, development and other agreements on favorable terms, and unexpected environmental and other hazards.

As of March 31, 2017, the following development properties and real estate venture development projects remain under construction (in thousands, except square footage/acreage and number of buildings):

Wholly Owned Developments/Redevelopments:

Construction Commencement Date	Expected Completion	Activity Type	Property/Portfolio Name	Location	Number of Buildings	Square Footage/ Units		Estimated Costs			Amount Funded
Q2 2014	(a)	Development	30th & Walnut Streets (FMC Tower at Cira Centre South)	Philadelphia, PA	1	625,000 / 268 units		$	400,000		$	379,200
Q2 2016	Q2 2017	Development	933 First Avenue	King Of Prussia, PA	1		111,000		26,800			17,200
TBD	Q1 2018	Development	Subaru National Training Center	Camden, NJ	1		83,000		44,300			10,800
Q4 2016	Q4 2017	Redevelopment	Broadmoor - Building 6	Austin, Texas	1		144,000		6,600	(b)		1,900
TBD	Q1 2018	Redevelopment	500 North Gulph Road	King Of Prussia, PA	1		100,000		16,800	(c)		100
		Total			5		1,063,000	$	494,500		$	409,200

(a) The office component was substantially completed during the third quarter of 2016. During 2017, we began placing into service the residential component, comprised of 103 flexible stay units, 60 furnished extended stay units and 105 luxury apartment residences. As of March 31, 2017, 63 flexible stay units, 33 extended stay units and 22 luxury apartment residences were in service.

(b) Building vacated by anchor tenant in the office complex as part of an overall lease restructuring. We are renovating the property as the first step in the repositioning of the Broadmoor Campus. Total project costs exclude $9.2 million of existing property basis.

(c) Building was vacated during the fourth quarter of 2016. Current plans are to renovate and amenitize the property. Total project costs exclude $4.6 million of existing property basis.

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In addition, the above table does not include amounts related to the Schuylkill Yards Project. See below under “Other Development Activities” for further details.

Unconsolidated Real Estate Venture Developments:

The developments at our JBG Ventures and 4040 Wilson Venture remain in predevelopment at March 31, 2017.  For further information relating to these developments see Item 1., "Business - Developments" included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2016.

On May 29, 2015, we and an unaffiliated third party, JBG/DC Manager, LLC ("JBG"), formed 51 N 50 Patterson, Holdings, LLC Venture ("51 N Street") and 1250 First Street Office, LLC Venture ("1250 First Street") (collectively the “JBG Ventures”). The JBG Ventures expect to develop three buildings in Washington, D.C. For further information see Item 1., "Business - Developments" included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2016.

Other Development Activities:

On December 3, 2015, we entered into an agreement as development manager to construct Subaru of America’s (“Subaru”) corporate headquarters (the “Subaru Headquarters Development”), an office property containing five floors and approximately 250,000 square feet, on land owned by Subaru and located in Camden, New Jersey. In addition to development fees, the agreement provides us the ability to earn additional profit if total project costs are less than the not-to-exceed (“NTE”) amount. As of March 31, 2017, we estimate that we will earn $1.4 million of residual profit upon completion of the Subaru Headquarters Development, of which $0.8 million was recognized as of March 31, 2017. The NTE amount, currently at $78.1 million, may be adjusted by change orders agreed upon by both Subaru and us. If construction costs exceed the NTE amount, we are obligated to pay the excess and the residual profit recognized will be reversed.  As of March 31, 2017, $41.5 million of the project costs had been funded, and we do not expect to incur costs in excess of the NTE amount. 

Also on December 3, 2015, we entered into an agreement to construct an 83,000 square foot build-to-suit service center (the “Subaru NSTC Development”) on land parcels owned by us for Subaru as the single tenant. We currently expect to deliver the building during the second quarter of 2018. At March 31, 2017, $10.8 million of the project costs, totaling $44.3 million, had been funded. This project is currently consolidated in our financial statements, whereas the Subaru Headquarters Development is a third party development and is not consolidated in our financial statements. See Item 1., “Business – Other Development Activities,” included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2016 for further information on this development.

As of March 31, 2017, we are still in the planning phase of our master developer agreement with Drexel University for the Schuylkill Yards Project. For further information relating to this development see Item 1., "Business - Developments" included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2016.

Reference is made to our Annual Report on Form 10-K for the year ended December 31, 2016 for project overviews, as well as risks associated with these development projects. See Item 2., "Liquidity and Capital Resources – Contractual Obligations" below in this Item 2 for contractual commitments relating to our ongoing development projects.

Land Holdings

As of March 31, 2017, we owned approximately 312 acres of undeveloped land, and held options to purchase approximately 60 additional acres of undeveloped land. As market conditions warrant, we will seek to opportunistically dispose of those parcels that we do not anticipate developing. For parcels of land that we ultimately develop, we will be subject to risks and costs associated with land development, including building moratoriums and the inability to obtain necessary zoning, land-use, building, occupancy and other required governmental approvals, construction cost increases or overruns and construction delays, and insufficient occupancy rates and rental rates. As of March 31, 2017, the total potential development that these land parcels could support, under current zoning and entitlements, amounted to 12.2 million square feet of development, inclusive of the options to purchase approximately 60 additional acres of undeveloped land.

Impairments and Disposal of Long-Lived Assets

We review our long-lived assets for impairment following the end of each quarter using cash flow projections and estimated fair values for each of the properties included within our impairment analysis. We update leasing and other assumptions regularly, paying particular attention to properties where there is an event or change in circumstances that indicates an impairment in value. Additionally, we consider strategic decisions regarding the future development plans for property under development and other market factors. For long-lived assets to be held and used, we analyze recoverability based on the estimated undiscounted future cash flows expected to be

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generated from the operations and eventual disposition of the assets over, in most cases, a 10-year hold period. If there is significant possibility that we will dispose of assets earlier, we analyze the recoverability using a probability weighted analysis of the undiscounted future cash flows expected to be generated from the operations and eventual disposition of each asset using various possible hold periods. If the recovery analysis indicates that the carrying value of the tested property is not recoverable, the property is written down to its fair value and an impairment loss is recognized. In such case, an impairment loss is recognized in the amount of the excess of the carrying amount of the asset over its fair value. If and when our plans change, we revise our recoverability analysis to use cash flows expected from operations and eventual disposition of each asset using hold periods that are consistent with our revised plans.

Estimated cash flows used in such analysis are based on our plans for the property and our views of market economic conditions. The estimates consider factors such as current and future rental rates, occupancies for the tested property and comparable properties, estimated operating and capital expenditures and recent sales data for comparable properties. Most of these factors are influenced by market data obtained from real estate leasing and brokerage firms and our direct experience with the properties and their markets.

We generally consider assets to be “held for sale” when the transaction has been approved by our Board of Trustees, or by officers vested with authority to approve the transaction and there are no known significant contingencies relating to the sale of the property within one year of the consideration date and the consummation of the transaction is otherwise considered probable. When a property is designated as held for sale, we stop depreciating the property and estimate the property’s fair value, net of selling costs. If the determination is made that the estimated fair value, net of selling costs, is less than the net book value of the property, an impairment loss is recognized equal to the difference and reduces the net book value of the property. For periods in which a property is classified as held for sale, we classify the assets of the property as held for sale on the consolidated balance sheet for such periods.

The relevant accounting guidance for impairments requires that qualifying assets and liabilities and the results of operations that have been sold, or otherwise qualify as “held for sale,” be presented as discontinued operations in all periods presented if the disposal represents a strategic shift that has, or will have, a major effect on our operations and financial results. If deemed a discontinued operation, then the components of the property’s net income that are reflected as discontinued operations include net gain (or loss) on disposition of real estate, operating results, depreciation and interest expense (if the property is subject to a secured loan).

Impairments of Land Held for Development

When demand for build-to-suit office space declines and the ability to sell land held for development deteriorates, or other market factors indicate a possible impairment in the recoverability of land held for development, it is reviewed for impairment by comparing its fair value to its carrying value. If the estimated sales value is less than the carrying value, the carrying value is written down to its estimated fair value.  

Equity Method Investments in Unconsolidated Real Estate Ventures

Under the equity method, investments in unconsolidated Real Estate Ventures are recorded initially at cost, as Investments in unconsolidated Real Estate Ventures, and subsequently adjusted for equity in earnings, cash contributions, distributions and impairments. For Real Estate Ventures that are constructing assets to commence planned principal operations, we capitalize interest expense using our weighted average interest rate of consolidated debt and our investment balance as a basis. Planned principal operations commence when a property is available to lease and at that point in time we cease capitalizing interest to our investment basis. During the three-month periods ended March 31, 2017 and 2016, we capitalized $0.4 million and $0.7 million, respectively.

On a periodic basis, management also assesses whether there are any indicators that the value of our investments in unconsolidated real estate ventures may be other than temporarily impaired. An investment is impaired only if the value of the investment, as estimated by management, is less than the carrying value of the investment and the decline is other than temporary. To the extent impairment has occurred, the loss shall be measured as the excess of the carrying amount of the investment over the fair value of the investment, as estimated by management. Our estimates of value for each investment (particularly in commercial real estate joint ventures) are based on a number of assumptions that are subject to economic and market uncertainties including, among others, demand for space, competition for tenants, changes in market rental rates, and operating costs. These factors are difficult to predict and are subject to future events that may alter management’s assumptions; accordingly, the values estimated by management in its impairment analyses may not be realized.

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RECENT PROPERTY TRANSACTIONS

Dispositions

We sold the following eight office properties and one mixed-use property during the three-month period ended March 31, 2017 (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)				Occupancy % at Date of Sale
March 30, 2017	200, 210 & 220 Lake Drive East (Woodland Falls)	Cherry Hill, NJ		3		215,465	$	19,000	$	17,771	$	(249	)	(b)		93.3%
March 15, 2017	Philadelphia Marine Center (Marine Piers)	Philadelphia, PA		1		181,900		21,400		11,182		6,498		(c)		100.0%
March 13, 2017	11700, 11710, 11720 & 11740 Beltsville Drive (Calverton)	Beltsville, MD		3		313,810		9,000		8,354		-		(d)		49.7%
February 2, 2017	1200 & 1220 Concord Avenue (Concord Airport Plaza)	Concord, CA		2		350,256		33,100		32,010		551		(e)		100.0%
Total Dispositions				9		1,061,431	$	82,500	$	69,317	$	6,800

(a) Gain/(Loss) on Sale is net of closing and other transaction related costs.

(b) During the fourth quarter of 2016, we recognized a $7.3 million impairment related to these properties.

(c) On March 15, 2017, we sold our sublease interest in the Piers at Penn’s Landing (the “Marine Piers”), which includes leasehold improvements containing 181,900 net rentable square feet, and a marina, located in Philadelphia, Pennsylvania for a sales price of $21.4 million, which will be paid in two installments. On the closing date, the buyer paid $12.0 million in cash. On the second purchase price installment date, the buyer will pay $9.4 million. The second purchase price installment is due on (a) January 31, 2020, in the event that the tenant at the Marine Piers does not exercise its existing option to extend the term of the sublease or (b) January 15, 2024, in the event that the tenant does exercise its current extension option to extend the term of the sublease. In accordance with ASC 360-20, Real Estate Sales, we determined that it is appropriate to account for the sales transaction under the cost recovery method. We received cash proceeds of $11.2 million, after closing costs and prorations, and the net book value of the Marine Piers was $4.7 million, resulting in a gain on sale of $6.5 million. The remaining gain on sale of $9.4 million will be recognized on the second purchase price installment date. The Marine Piers was classified as mixed-use within our property count.

(d) During the fourth quarter of 2016, we recognized a $3.0 million impairment related to these properties. During the first quarter of 2017, there was a price reduction of $1.7 million under the agreement of sale. As such, an additional impairment of $1.7 million was recognized during the first quarter of 2017.

(e) This sale is designated as a like-kind exchange under Section 1031 of the IRC and, as such, the proceeds, totaling $32.0 million after closing costs and prorations, were deposited with a Qualified Intermediary, as defined under the IRC. The proceeds received at closing were recorded as “Other assets” in our consolidated balance sheet as of March 31, 2017.

In addition to the amounts in the table above, we recorded $0.5 million gain during the first quarter of 2017 from the receipt of additional cash from the disposition of Cira Square during 2016. For further information relating to this sale, see Note 3, “Real Estate Investments,” in the notes to the audited financial statements included in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2016.

We sold the following land parcels during the three-month period ended March 31, 2017 (dollars in thousands):

Disposition Date	Property/Portfolio Name	Location	Number of Parcels		Acres		Sales Price		Net Proceeds on Sale		Gain on Sale
February 15, 2017	Gateway Land C	Richmond, VA		1		4.8	$	1,100	$	1,043	$	-	(a)
January 30, 2017	Garza Ranch	Austin, TX		1		1.7		3,500		3,277		-	(b)
Total Dispositions				2		6.5	$	4,600	$	4,320	$	-

(a) During the fourth quarter of 2016, we recognized a nominal impairment related to this land parcel.

(b) We have a continuing involvement through a completion guaranty, which requires us as developer to complete certain infrastructure improvements on behalf of the buyers of the land parcels. The cash received at settlement was recorded as “Deferred

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income, gains and rent” on ourconsolidated balance sheet and we will recognize the sale once the infrastructure improvements are complete.

The disposal of the properties and land referenced above do not represent a strategic shift that has a major effect on our operations and financial results. Accordingly, the operating results of these properties remain classified within continuing operations for all periods presented.

Held for Sale

The following is a summary of one property classified as held for sale but which did not meet the criteria to be classified within discontinued operations at March 31, 2017 (in thousands):

	Held for Sale Property Included in Continuing Operations
	March 31, 2017
	Other Segment - Retail
ASSETS HELD FOR SALE
Real estate investments:
Operating properties	$	5,576
Accumulated depreciation		(79	)
Operating real estate investments, net		5,497
Land held for development		-
Total real estate investments, net		5,497
Other assets		765
Total assets held for sale, net	$	6,262
LIABILITIES HELD FOR SALE
Other liabilities	$	387
Total liabilities held for sale	$	387

As the fair value less anticipated costs to sell exceeded the carrying value for the property included in the above table, no provision for impairment was recorded. The fair value measurement is based on pricing in the purchase and sale agreement for the property. The disposal of the property referenced above does not represent a strategic shift that has a major effect on our operations and financial results. Accordingly, the operating results of this property remain classified within continuing operations for all periods presented.

Held for Use Impairment

As of March 31, 2017, we evaluated the recoverability of the carrying value of our properties that triggered assessment under the undiscounted cash flow model. Based on our evaluation, it was determined that due to the reduction in our intended hold period of four properties located in the Other segment, we would not recover the carrying values of these properties. Accordingly, we recorded impairment charges on these properties of $1.0 million at March 31, 2017, reducing the aggregate carrying values of the properties from $10.2 million to their estimated fair value of $9.2 million. We measured these impairments based on a discounted cash flow analysis, using a hold period of 10 years and residual capitalization rates and discount rates of 9.00% and 9.25%, respectively. The results were comparable to indicative pricing in the market.

Parc at Plymouth Meeting Venture

On January 31, 2017, we sold our 50% interest in TB-BDN Plymouth Apartments, L.P., a 50/50 real estate venture with Toll Brothers, at a gross sales value of $100.5 million.  The venture developed and operates a 398-unit multi-family complex in Plymouth Meeting, Pennsylvania encumbered by a $54.0 million construction loan. The construction loan was repaid commensurate with the sale of our 50% interest. As a result, we are no longer subject to a $3.2 million payment guarantee on the construction loan. The cash proceeds, after the payment of our share of the debt and closing costs, were $27.2 million.  The carrying amount of our investment at the time of sale was $12.6 million, resulting in a $14.6 million gain on sale of interest in the real estate venture.

CRITICAL ACCOUNTING POLICIES AND ESTIMATES

Management’s Discussion and Analysis of Financial Condition and Results of Operations discuss our consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP). The preparation of these financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Certain accounting policies are considered to be critical accounting policies, as they require management to make assumptions about matters that are highly uncertain at the time the estimate is

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made and changes in accounting estimate are reasonably likely to occur from period to period. Management bases its estimates and assumptions on historical experience and current economic conditions.

Our Annual Report on Form 10-K for the year ended December 31, 2016 contains a discussion of our critical accounting policies. There have been no significant changes in our critical accounting policies since December 31, 2016. See also Note 2, "Basis of Presentation," in our unaudited consolidated financial statements for the three-month period ended March 31, 2017, set forth herein.

RESULTS OF OPERATIONS

The following discussion is based on our consolidated financial statements for the three-month periods ended March 31, 2017 and 2016. We believe that presentation of our consolidated financial information, without a breakdown by segment, will effectively present important information useful to our investors.

Net operating income (“NOI”) as presented in the comparative analysis below is a non-GAAP financial measure defined as total revenue less property operating expenses, real estate taxes and third party management expenses. Property operating expenses that are included in determining NOI consist of costs that are necessary and allocable to our operating properties such as utilities, property-level salaries, repairs and maintenance, property insurance, management fees and bad debt expense. General and administrative expenses that are not reflected in NOI primarily consist of corporate-level salaries, amortization of share awards and professional fees that are incurred as part of corporate office management. NOI is a non-GAAP financial measure that we use internally to evaluate the operating performance of our real estate assets by segment, as presented in Note 13, "Segment Information," to our consolidated financial statements, and of our business as a whole. We believe NOI provides useful information to investors regarding our financial condition and results of operations because it reflects only those income and expense items that are incurred at the property level. While NOI is a relevant and widely used measure of operating performance of real estate investment trusts, it does not represent cash flow from operations or net income as defined by GAAP and should not be considered as an alternative to those measures in evaluating our liquidity or operating performance. NOI does not reflect interest expenses, real estate impairment losses, depreciation and amortization costs, capital expenditures and leasing costs. We believe that net income, as defined by GAAP, is the most appropriate earnings measure. See Note 13, "Segment Information," to our consolidated financial statements for a reconciliation of NOI to our consolidated net income as defined by GAAP.

Comparison of the Three-Month Periods Ended March 31, 2017 and March 31, 2016

The table below shows selected operating information for the “Same Store Property Portfolio” and the “Total Portfolio.” The Same Store Property Portfolio consists of 97 properties containing an aggregate of approximately 15.0 million net rentable square feet, and represents properties that we owned for the entire three-month periods ended March 31, 2017 and 2016. The Total Portfolio includes the effects of other properties that were either placed into service, acquired or redeveloped after January 1, 2016 and disposed of prior to March 31, 2017 or classified as held for sale as of March 31, 2017. A property is excluded from our Same Store Property Portfolio and moved into the redevelopment column in the period that we determine that a redevelopment would be the best use of the asset, and when said asset is taken out of service or is undergoing re-entitlement for a future development strategy. This table also includes a reconciliation from the Same Store Property Portfolio to the Total Portfolio net income (i.e., all properties owned by us during the three-month periods ended March 31, 2017 and 2016) by providing information for the properties which were acquired, placed into service, under development or redevelopment and administrative/elimination information for the three-month periods ended March 31, 2017 and 2016 (in thousands).

The Total Portfolio net income presented in the table is equal to the net income of the Parent Company and the Operating Partnership.

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Comparison of three months endedMarch 31, 2017to the three months endedMarch 31, 2016

	Same Store Property Portfolio									Recently Completed/Acquired Properties				Development/Redevelopment Properties (a)						Other/(Eliminations) (b)						Total Portfolio
(dollars and square feet in thousands)	2017			2016			Increase/ (Decrease)			2017		2016		2017			2016			2017			2016			2017			2016			Increase/ (Decrease)
Revenue:
Cash rents	$	90,879		$	85,727		$	5,152		$	-	$	-	$	2,242		$	2,050		$	2,026		$	13,728		$	95,147		$	101,505		$	(6,358	)
Straight-line rents		2,486			5,789			(3,303	)		-		-		4,438			446			(77	)		191			6,847			6,426			421
Above/below market rent amortization		1,353			2,010			(657	)		-		-		(15	)		222			-			-			1,338			2,232			(894	)
Total rents		94,718			93,526			1,192			-		-		6,665			2,718			1,949			13,919			103,332			110,163			(6,831	)
Tenant reimbursements		16,880			16,436			444			-		-		743			417			912			3,201			18,535			20,054			(1,519	)
Termination fees		1,195			118			1,077			-		-		466			155			12			21			1,673			294			1,379
Third party management fees, labor reimbursement and leasing		-			-			-			-		-		-			-			6,485			5,235			6,485			5,235			1,250
Other		450			542			(92	)		-		-		11			6			434			208			895			756			139
Total revenue		113,243			110,622			2,621			-		-		7,885			3,296			9,792			22,584			130,920			136,502			(5,582	)
Property operating expenses		32,268			32,637			369			-		-		3,138			1,243			1,479			6,999			36,885			40,879			3,994
Real estate taxes		10,421			10,058			(363	)		-		-		354			218			974			1,610			11,749			11,886			137
Third party management expenses		-			-			-			-		-		-			-			2,447			2,010			2,447			2,010			(437	)
Net operating income		70,554			67,927			2,627			-		-		4,393			1,835			4,892			11,965			79,839			81,727			(1,888	)
Depreciation and amortization		40,933			43,870			2,937			-		-		4,305			2,234			654			2,769			45,892			48,873			2,981
General & administrative expenses		-			-			-			-		-		-			-			9,425			9,120			9,425			9,120			(305	)
Provision for impairment (c)		-			-			-			-		-		-			-			2,730			7,390			2,730			7,390			4,660
Operating income	$	29,621		$	24,057		$	5,564		$	-	$	-	$	88		$	(399	)	$	(7,917	)	$	(7,314	)	$	21,792		$	16,344		$	5,448
Number of properties (d)	97			97										6												103
Square feet		15,033			15,033										1,513												16,546
Core Occupancy % (e)		93.2	%		94.0	%
Other Income (Expense):
Interest income																											393			320			73
Interest expense																											(21,437	)		(23,691	)		2,254
Interest expense — Deferred financing costs																											(634	)		(774	)		140
Interest expense —Financing obligation																											-			(281	)		281
Equity in loss of real estate ventures																											(748	)		(403	)		(345	)
Net gain on disposition of real estate																											7,323			115,456			(108,133	)
Net gain on real estate venture transactions																											14,582			5,929			8,653
Loss on early extinguishment of debt																											-			(66,590	)		66,590
Net income																										$	21,271		$	46,310		$	(25,039	)
Net income per common share																										$	0.11		$	0.25		$	(0.14	)

EXPLANATORY NOTES

(a) Results include: three developments and three redevelopment properties.

(b) Represents certain revenues and expenses at the corporate level as well as various intercompany costs that are eliminated in consolidation, third-party management fees and provisions for impairment. It also includes properties sold that do not qualify as discontinued operations and properties classified as held for sale.

(c) Held for use impairment charges are excluded from Same Store Property Portfolio operating income and presented in Other (Eliminations). See Note 3, “Real Estate Investments” to the consolidated financial statements for further information.

(d) Total Portfolio excludes one property classified as held for sale.

(e) Pertains to Core Properties (i.e. not under development, redevelopment, or re-entitlement).

Total Revenue

Cash rents from the Total Portfolio decreased by $6.4 million during the first quarter of 2017 compared to the first quarter of 2016, primarily attributable to:

• $11.4 million decrease due to the disposition of 76 properties from the first quarter of 2016 through the first quarter of 2017 (the “2016 and 2017 Dispositions”); and

• $0.4 million decrease from Other/(Elimination) Properties, primarily due to a surface parking lot in the Philadelphia CBD segment taken out of service for improvements during the first quarter of 2017; offset by,

• $0.2 million increase from Development/Redevelopment Properties for the first quarter of 2017 compared to the first quarter of 2016; and

• $5.2 million increase in the Same Store Property Portfolio due to positive cash rent growth and free rent converting to cash rent in the Philadelphia CBD segment in 2017 compared to 2016.

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Straight-line rents from the Total Portfolio increased by $0.4 million due to a $4.0 millionincrease relatedto the office component of the FMC Tower being placed into service during the second half of 2016, offset by a decrease of $3.3 million from the Same Store Property Portfolio due to free rent converting to cash rent in the Philadelphia CBD segment and a decrease of $0.3 million from the 2016 and 2017 Dispositions.

Above/below market rent amortization decreased by $0.9 million from the first quarter of 2016 to the first quarter of 2017, primarily attributable to a $0.7 million decrease in the Same Store Property Portfolio and a decrease of $0.2 million in Development/Redevelopment Properties in the Austin, Texas segment.  

Tenant reimbursements from the Total Portfolio decreased by $1.5 million during the first quarter of 2017 compared to the first quarter of 2016 primarily attributable to a $2.2 million decrease due to the 2016 and 2017 Dispositions. This decrease was partially offset by a $0.4 million increase in the Same Store Portfolio and $0.3 million increase from Development/Redevelopment Properties. Expense recoveries at the Same Store Portfolio increased modestly with a reimbursement percentage of 39.5% during the first quarter of 2017 compared to 38.5% in the first quarter of 2016.

Termination fees increased $1.4 million due to the timing of tenant terminations. The termination fees for the three-month period ended March 31, 2017 primarily related to the termination of one tenant in the Same Store Portfolio from our Philadelphia CBD region.

Third party management fees, labor reimbursement and leasing increased by $1.3 million for the first quarter of 2017 compared to the first quarter of 2016, primarily due to an increase of $0.6 million of lease commission income earned from the DRA Austin real estate venture. Management fees increased by $0.5 million related to the formation of the MAP Venture. Development fees related to various projects increased by $0.2 million.

Property Operating Expenses

Property operating expenses across our Total Portfolio decreased $4.0 million for the first quarter of 2017 compared to the first quarter of 2016, of which $4.3 million relates to the 2016 and 2017 Dispositions. This decrease was partially offset by an increase of $0.3 million, primarily due to payroll related expenses.

Depreciation and Amortization

Depreciation and amortization expense decreased by $3.0 million for the first quarter of 2017 compared to the first quarter of 2016, of which $2.9 million of the decrease relates to the Same Store Property Portfolio from the timing of intangible asset amortization, primarily in our Austin, Texas segment, and a $1.9 million decrease relating to the 2016 and 2017 Dispositions. These decreases were offset by a $2.1 million increase in depreciation expense, which primarily relates to a partially in-service Development/Redevelopment property.

Provision for Impairment

As of December 31, 2016, based on our held for sale impairment analysis, we determined that we would not recover the carrying value of three office properties located in the Metropolitan Washington D.C. segment. Because we determined that the carrying value of these properties exceeded their fair value, a $2.6 million impairment charge was recorded. Subsequent to our December 31, 2016 impairment review, there was a purchase price reduction of $1.7 million under the agreement of sale, which resulted in an additional impairment charge of $1.7 million during the quarter ended March 31, 2017.

As of March 31, 2017, based on our held for use impairment analysis, we determined that we would not recover the carrying value of four office properties located in the Other segment. Because we determined that the carrying value of these properties exceeded their fair value, a $1.0 million impairment charge was recorded.  

During the quarter ended March 31, 2016, based on our held for use impairment analysis, we determined that we would not recover the carrying value of two properties located in our Metropolitan Washington D.C. segment. Because we determined that the carrying value of these properties exceeded their fair value, a $7.4 million impairment charge was recorded.

Interest Expense

Interest expense decreased $2.3 million from the first quarter of 2016 to the first quarter of 2017 primarily due to the following:

• $2.2 million decrease related to the repayment of the 6.00% Guaranteed Note due on April 1, 2016 ;

• $0.8 million decrease related to the refinance of Two Logan Square on April 7, 2016;

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• $0.4 million decrease in interest expense related to the Credit Facility, under which there were no borrowings during the first quarter of 2017;

• $0.5 million decrease related to the repayment of the mortgage debt on Cira Square and Cira South Garage on January 14, 2016; and

• $0.3 million decrease in interest expense, including a decrease in financing obligation interest expense, for 3141 Fairview Park Drive, as we deconsolidated this property in August 2016.

The decrease of $4.4 million in interest expense described above was offset by a $1.9 million decrease in capitalized interest due to placing portions of the FMC project into service subsequent to the first quarter of 2016.  

Equity in Loss of Real Estate Ventures

The decrease in equity in loss from Real Estate Ventures of $0.3 million for the first quarter of 2017 compared to the first quarter of 2016 is primarily due to the following:

• $0.6 million of operating losses from the MAP Venture, which was formed on February 4, 2016;

• $0.3 million of operating losses recognized from the 1919 Market Street Venture, which was placed into service subsequent to the first quarter of 2016; and

• $0.2 million of operating losses recognized from evo at Cira primarily attributable to an increase in depreciation expense related to assets placed into service subsequent to the first quarter of 2016.

The decreases of $1.1 million were offset by $0.8 million in additional income from the Brandywine – AI Venture related to an increase in average occupancy from 79.9% to 82.1% for the first quarter of 2017 compared to the first quarter of 2016.

Net Gain on Disposition of Real Estate

The net gain on disposition of real estate recognized in the first quarter of 2017 resulted from a gain of $0.5 million on the sale of two office properties located in Concord, California, a gain of $6.5 million from the sale of the Marine Piers located in Philadelphia, Pennsylvania and an additional $0.5 million gain recognized on Cira Square, which was disposed of in the first quarter of 2016.  These gains were offset by a loss of $0.2 million, representing closing costs, on the sale of three office properties located in Cherry Hill, New Jersey.

The $115.5 million net gain on disposition of real estate recognized in the first quarter 2016 resulted from the sale of an office property known as Cira Square, located in Philadelphia, Pennsylvania, consisting of 862,692 square feet.

Net Gain from Real Estate Venture Transactions

The $14.6 million gain recognized during the first quarter of 2017 resulted from the sale of our entire 50% interest in TB-BDN Plymouth Apartments, L.P.  

The $5.9 million gain recognized during the first quarter of 2016 primarily relates to the sale of our entire 50% interest in the Coppell Associates real estate venture.

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Loss on Early Extinguishment of Debt

On January 14, 2016, we used borrowings from our $600.0 million unsecured revolving credit facility to fund the repayment of our $176.9 million mortgage and our $35.5 million mortgage which encumbered Cira Square and Cira South Garage, respectively. Each mortgage was repaid ahead of its scheduled maturity date of September 10, 2030, which resulted in prepayment penalties and non-cash charges for the write-off of deferred financing costs totaling $66.6 million. We subsequently repaid in full the advances under our unsecured revolving credit facility with the proceeds from the dispositions of real estate that occurred during the first quarter of 2016. There were no comparable extinguishments of debt incurred during the first quarter of 2017.  

Net Income

Net income decreased by $25.0 million during the first quarter of 2017 compared to the first quarter of 2016 as a result of the factors described above. Net income is significantly impacted by depreciation of operating properties and amortization of acquired intangibles. These non-cash charges do not directly affect our ability to pay dividends.

LIQUIDITY AND CAPITAL RESOURCES

General

Our principal liquidity needs for the next twelve months are as follows:

• fund normal recurring expenses,

• fund capital expenditures, including capital and tenant improvements and leasing costs,

• fund repayment of certain debt instruments when they mature – inclusive of the $300.0 million 5.70% Guaranteed Notes due May 1, 2017,

• fund current development and redevelopment costs,

• fund commitments to unconsolidated real estate ventures,

• fund distributions to shareholders to maintain REIT status, and

• fund common and preferred share repurchases.

As of March 31, 2017, the Parent Company owned a 99.2% interest in the Operating Partnership. The remaining interest of approximately 0.8% pertains to common limited partnership interests owned by non-affiliated investors who contributed property to the Operating Partnership in exchange for their interests. As the sole general partner of the Operating Partnership, the Parent Company has full and complete responsibility for the Operating Partnership’s day-to-day operations and management. The Parent Company’s source of funding for its dividend payments and other obligations is the distributions it receives from the Operating Partnership.

We believe that our liquidity needs will be satisfied through available cash balances, our revolving line of credit and cash flows generated by operations, financing activities, including access to equity financing, including through “at-the-market” equity program and selective property sales. Rental revenue, expense recoveries from tenants, and other income from operations are our principal sources of cash to pay operating expenses, debt service, recurring capital expenditures and the minimum distributions required to maintain our REIT qualification. We seek to increase cash flows from our properties by maintaining quality standards for our properties that promote high occupancy rates and permit increases in rental rates while reducing tenant turnover and controlling operating expenses. Our revenue also includes third-party fees generated by our property management, leasing, development and construction businesses. We believe that our revenue, together with proceeds from property sales and debt financings, will continue to provide funds for our short-term liquidity needs. However, material changes in our operating or financing activities may adversely affect our net cash flows. With uncertain economic conditions, vacancy rates may increase, effective rental rates on new and renewed leases may decrease and tenant installation costs, including concessions, may increase in most or all of our markets throughout the remainder of 2017 and possibly beyond. As a result, our revenues and cash flows could be insufficient to cover operating expenses, including increased tenant installation costs, pay debt service or make distributions to shareholders over the short-term. If this situation were to occur, we expect that we would finance cash deficits through borrowings under our unsecured credit facility and other sources of debt and equity financings.  In addition, a material adverse change in cash provided by operations could adversely affect our compliance with financial performance covenants under our unsecured credit facility, including unsecured term loans and unsecured notes. As of March 31, 2017, we were in compliance with all of our debt covenants and requirement obligations.

We use multiple financing sources to fund our long-term capital needs. When needed, we use borrowings under our unsecured credit facility for general business purposes, including to meet debt maturities and to fund distributions to shareholders as well as development and acquisition costs and other expenses from time to time as necessary. In light of the volatility in financial markets and economic

46

uncertainties, it is possible, that one or more lenders under our unsecured revolving credit facility could fail to fund a borrowing request. Such an event could adversely affect our ability to access funds from our unsecured credit facility when needed to fund distributions or pay expenses.

Our ability to incur additional debt is dependent upon a number of factors, including our credit ratings, the value of our unencumbered assets, our degree of leverage and borrowing restrictions imposed by our lenders. If one or more rating agencies were to downgrade our unsecured credit rating, our access to the unsecured debt market would be more limited and the interest rate under our unsecured credit facility and unsecured term loan would increase.

The Parent Company unconditionally guarantees the Operating Partnership’s secured and unsecured obligations, which, as of March 31, 2017, amounted to $323.8 million and $1,703.6 million, respectively.

We maintain a shelf registration statement that has registered the offering and sale of common shares, preferred shares, depositary shares, warrants and unsecured debt securities. Subject to our ongoing compliance with securities laws, and if warranted by market conditions, we may offer and sell equity and debt securities from time to time under the shelf registration statement.

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. We expect to fund the share repurchases with a combination of available cash balances and availability under our line of credit. As of March 31, 2017, 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, 2017 or the three months ended March 31, 2016.

The Parent Company, other than acting as the sole general partner of the Operating Partnership, also issues equity from time to time, the proceeds of which it contributes to the Operating Partnership in exchange for additional interests in the Operating Partnership, and guarantees debt obligations of the Operating Partnership.  The Parent Company’s ability to sell common shares and preferred shares is dependent on, among other things, general market conditions for REITs, market perceptions about the Company as a whole and the current trading price of the Parent Company’s shares.

The Operating Partnership also considers net sales of selected properties as another source of managing its liquidity.

We continue to maintain substantial liquidity, and as of March 31, 2017, we had available cash of approximately $234.7 million and $587.6 million of availability, net of $12.4 million of outstanding letters of credit, under our unsecured revolving credit facility.

Cash Flows

The following discussion of our cash flows is based on the consolidated statement of cash flows and is not meant to be a comprehensive discussion of the changes in our cash flows for the periods presented.

As of March 31, 2017 and December 31, 2016, we maintained cash and cash equivalents of $234.7 million and $193.9 million, respectively. The following are the changes in cash flow from our activities for the three-month periods ended March 31, 2017 and 2016 (in thousands):

Activity	2017			2016
Operating	$	40,259		$	39,194
Investing		31,843			622,552
Financing		(31,367	)		(294,923	)
Net cash flows	$	40,735		$	366,823

Our principal source of cash flows is from the operation of our properties. Our properties provide a relatively consistent stream of cash flows that provides us with the resources to fund operating expenses, debt service and quarterly dividends. We do not restate our cash flows for discontinued operations.

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The net increase of $1.1 million in cash from operating activities for the threemonths ended March 31, 2017 compared to the threemonths ended March 31, 2016 is primarily attributable to thefollowing:

• free rent converting to cash rent, primarily in our Philadelphia CBD segment; and

• the timing of cash receipts and cash expenditures in the normal course of operations.

The increases in cash from operating activities were offset by reductions in operating cash from properties included in the 2016 and 2017 Dispositions.

The net decrease of $590.7 million in cash provided by investing activities during the three months ended March 31, 2017 to the three months ended March 31, 2016 relates to the 2016 repositioning of the property portfolio. Factors for the properties strategically targeted for disposition include, but are not limited to the following; (i) the exit from certain markets identified by management for divestiture and (ii) lower asset-class/quality properties. Quantitatively, the decrease resulted from the following:

• $630.8 million decrease in net proceeds from the disposition of 9 properties and two land parcels during the three months ended March 31, 2017 compared to the sale of 59 office properties and a land parcel during the three months ended March 31, 2016; and

• $39.0 million increase in escrow cash due to timing of payments and the disposition of the Concord Airport Plaza in Concord, California, on February 2, 2017. The net proceeds on sale of $32.0 million were recorded as Other assets in our consolidated balance sheet as the sale was designated as a like-kind exchange under Section 1031 of the IRC. As the transaction proceeds were also included in the “Proceeds from the sales of properties” caption on the statement of cash flows, the transaction had no impact on investing cash flows during the first quarter of 2017.

The decrease in cash provided by investing activities was primarily offset by the following transactions:

• $36.5 million decrease in capital expenditures for tenant improvements, developments/redevelopments and leasing commissions, primarily related to less tenant improvement expenditures from the reduced number of properties from the portfolio repositioning and reduced development expenditures from the completion of the development at 1900 Market Street in Philadelphia, Pennsylvania and FMC Tower in Philadelphia, Pennsylvania, as the project is nearing completion;

• $22.4 million increase in distribution of sale proceeds from a real estate venture as a result of the sale of our 50% interest in TB-BDN Plymouth Apartments, L.P. (referred to as the “Parc at Plymouth Meeting Venture”), from which we received net proceeds of $27.2 million at closing (See Note 4, “Investment in Unconsolidated Real Estate Ventures” to the consolidated financial statements for further information);

• $9.5 million decrease of investments in unconsolidated Real Estate Ventures primarily due to contributions for the three months ended March 31, 2017 of $4.0 million to the DRA Austin real estate venture and $0.9 million to the JBG real estate venture compared to contributions of $12.8 million to evo at Cira to increase our ownership interest from 30% to 50% and $1.4 million to the JBG real estate ventures during the three months ended March 31, 2016;

• $6.9 million increase in cash distributions in excess of cumulative equity in income from Real Estate Ventures;

• $2.5 million increase in deposits;

• $0.6 million increase in receipts related to advances made for the purchase of tenant assets, net of repayments; and

• $0.6 million decrease in leasing costs paid.

The net decrease of $263.6 million in cash used in financing activities for the three months ended March 31, 2017 compared to the three months ended March 31, 2016 reflects our efforts during 2016 to decrease our leverage by using cash flows from property sales in connection with the repositioning of the portfolio. Quantitatively, the decrease resulted from the following:

• $266.0 million net decrease from the repayments of mortgage notes payable during the three-month period ended March 31, 2017 compared to the three-month period ended March 31, 2016, primarily due to the early repayment of $212.4 million of mortgage notes payable and the related $53.4 million of prepayment penalties for Cira Square and Cira South Garage during the three months ended March 31, 2016.

The decrease in cash used in financing activities was offset by the following transactions:

• $1.8 million increase in distributions paid to shareholders and on non-controlling interests due to the 6.7% increase of our dividend from $0.15 per share to $0.16 per share during the third quarter of 2016; and

• $0.8 million decrease in proceeds from the exercise of stock options.

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Capitalization

Indebtedness

The table below summarizes indebtedness under our mortgage notes payable and our unsecured notes at March 31, 2017 and December 31, 2016:    

	March 31, 2017			December 31, 2016
	(dollars in thousands)
Balance: (a)
Mortgage notes payable	$	323,823		$	325,038
Unsecured debt		1,703,610			1,703,610
Total	$	2,027,433		$	2,028,648
Percent of Total Debt:
Mortgage notes payable		16.0	%		16.0	%
Unsecured debt		84.0	%		84.0	%
Total		100.0	%		100.0	%
Weighted-average interest rate at period end:
Mortgage notes payable		4.0	%		4.0	%
Unsecured debt		4.6	%		4.6	%
Total		4.5	%		4.5	%
Weighted-average maturity in years:
Mortgage notes payable		5.3			5.6
Unsecured debt		5.7			6.0
Total		5.7			5.9

(a) Consists of unpaid principal and does not include premium/discount or deferred financing costs.

All debt shown above is fixed rate, which includes a $250.0 million term loan swapped to fixed. Scheduled principal payments and related weighted average annual effective interest rates for our debt as of March 31, 2017 are as follows (in thousands):

Period	Scheduled amortization		Principal maturities		Total		Weighted Average Interest Rate of Maturing Debt
2017	$	3,716	$	300,000	$	303,716		5.67	%
2018		6,601		325,000		331,601		5.11	%
2019		7,360		-		7,360		3.96	%
2020		6,457		80,521		86,978		3.98	%
2021		6,099		-		6,099		3.96	%
2022		6,332		250,000		256,332		3.63	%
2023		1,621		455,116		456,737		4.04	%
2024		-		250,000		250,000		4.23	%
Thereafter		-		328,610		328,610		4.36	%
Totals	$	38,186	$	1,989,247	$	2,027,433		4.48	%

The indenture under which the Operating Partnership issued its unsecured notes contains financial covenants, including (i) a leverage ratio not to exceed 60%, (ii) a secured debt leverage ratio not to exceed 40%, (iii) a debt service coverage ratio of greater than 1.5 to 1.0 and (iv) an unencumbered asset value of not less than 150% of unsecured debt. The Operating Partnership is in compliance with all covenants as of March 31, 2017.

The Operating Partnership has mortgage loans that are collateralized by certain of its properties. Payments on mortgage loans are generally due in monthly installments of principal and interest, or interest only. The Operating Partnership intends to refinance or repay its indebtedness as it matures through the use of proceeds from selective property sales and secured or unsecured borrowings. However, in the current and expected future economic environment one or more of these sources may not be available on attractive terms or at all.

Equity

On March 1, 2017, the Parent Company declared a distribution of $0.16 per common share, totaling $28.3 million, which it paid on April 19, 2017 to its shareholders of record as of April 5, 2017.  In addition, the Parent Company declared a distribution on its Series E

49

Preferred Shares to holders of record as of March30, 2017.  The Series E PreferredShares are entitled to a preferential return of 6.90% per annum on the $25.00 per share liquidation preference.  Distributions paid on April17, 2017 to holders of Series E Preferred Shares totaled $1.7 million. To fund these distributions, on March 1, 2017, the Operating Partnership declared a distribution of $0.16 per common partnership unit, totaling $28.3 million, which was paid on April19, 2017 to unitholders of record as of April5, 2017. In addition, the Operating Partnership declared distributions on its Series E-Linked Preferred Mirror Units to holders of record as of March 30, 2017. The Series E-Linked Preferred MirrorUnits are entitled to a preferential return of 6.90% per annum on the $25.00 per unit liquidation preference. Distributions paid on April17, 2017 to holders of Series E-Linked Preferred Mirror Units totaled $1.7 million. In order to maintain its qualification as a REIT, the Parent Company is required to, among other things, pay dividends to its shareholders of at least 90% of its REIT taxable income.  

On April 11, 2017, the Parent Company redeemed all of its outstanding 4,000,000 shares of Series E Preferred Shares at a redemption price of $25.00 per share with cash from existing cash balances on hand. In connection with the redemption, on April 11, 2017, the Operating Partnership also redeemed all of its Series E-Linked Preferred Mirror Units. See Note 15, “Subsequent Events” to the consolidated financial statements for further information.

Inflation

A majority of our leases provide for tenant reimbursement of real estate taxes and operating expenses either on a triple net basis or over a base amount. In addition, many of our office leases provide for fixed base rent increases. We believe that inflationary increases in expenses will be partially offset by expense reimbursement and contractual rent increases.

Contractual Obligations

The following table outlines the timing of payment requirements related to our contractual obligations as of March 31, 2017:

	Payments by Period (in thousands)
			Less than						More than
	Total		1 Year		1-3 Years		3-5 Years		5 Years
Mortgage notes payable (a)	$	323,823	$	4,978	$	14,584	$	92,753	$	211,508
Unsecured term loan (a)		250,000		-		-		-		250,000
Unsecured debt (a)		1,453,610		300,000		325,000		-		828,610
Ground leases (b)		62,932		1,205		2,410		2,410		56,907
Development contracts (c)		102,593		91,863		10,730		-		-
Interest expense (d)		434,718		72,831		110,651		91,003		160,233
Other liabilities (e)		28,060		2,339		5,282		9,417		11,022
	$	2,655,736	$	473,216	$	468,657	$	195,583	$	1,518,280

(a) Amounts are gross of deferred financing costs and do not include unamortized discounts and/or premiums.  

(b) Future minimum rental payments under the terms of all non-cancelable ground leases under which we are the lessee are expensed on a straight-line basis regardless of when payments are due. The table also does not include the future minimum rental payments related to two ground leases in Philadelphia, Pennsylvania.

(c) Represents contractual obligations for wholly owned development projects and does not contemplate all costs expected to be incurred for such developments. This table does not include contractual obligations for our real estate venture developments, which are referenced below.

(d) Variable rate debt future interest expense commitments are calculated using March 31, 2017 interest rates.

(e) Other liabilities consists of (i) our deferred compensation liability, (ii) the interest accretion on the anticipated transfer tax liability on Two Logan Square in Philadelphia, Pennsylvania, (iii) the contingent consideration associated with the purchase of 618 Market Street in Philadelphia, Pennsylvania and (iv) the deferred payment associated with the purchase of 2100 Market Street in Philadelphia, Pennsylvania.

The above table does not include amounts related to the JBG Ventures at 51 N 50 Patterson and 1250 First Street in Washington, D.C., the 1919 Ventures development of the property located at 20th and Market Street in Philadelphia, Pennsylvania or the 4040 Wilson development in Arlington, Virginia.  For further discussion of real estate venture developments, see Item 1. “Business – Developments,” included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2016 and section “Overview – Development Risk,” within Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” for further details.

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We provide customary guarantees for certain development projects of our unconsolidated real estate ventures. See Note 4, "Investment in Unconsolidated Real Estate Ventures," to the consolidated financial statements for further details on payment guarantees provided on the behalf of real estate ventures.

In addition, the above table does not include amounts related to the Schuylkill Yards Project. See Item 1. "Business - Developments" included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2016 for further details.

On July 1, 2016, we closed on the acquisition of 34.6 acres of land located in Austin, Texas known as the Garza Ranch. As of March 31, 2017, we are under agreement to sell 8.4 acres and have sold 1.7 acres (of the 34.6 acres) to two unaffiliated third parties. In connection with the agreements of sale, we entered into a development agreement and related completion guarantee to construct certain infrastructure improvements to the land on behalf of each buyer, estimated to cost $13.6 million. Total estimated costs related to the improvements are included in the sale price of each land parcel. Recognition of the profit earned upon sale of the land parcels is deferred until the improvements are completed. The unfunded portion of these infrastructure costs are not included in the above table within the ‘Development contracts’ caption.

As of December 31, 2016, we provided a cost overrun guarantee on the Subaru Headquarters Development(See Note 14, "Commitments and Contingencies" in our Consolidated Financial Statements for further information) for amounts in excess of the NTE amount.  The NTE amount, currently at $78.1 million, may be adjusted by change orders agreed upon by both Subaru and us.  We are obligated to pay for construction costs in excess of the NTE amount. The terms of the guarantee do not provide a limitation on the costs we may be responsible for. The above table does not include any costs related to this cost overrun guarantee.

As of March 31, 2017, we were obligated to pay a maximum of $42.5 million for tenant improvements not yet completed and expect to incur $10.1 million for capital improvements to operating properties, which are not included in the above table. We expect that most of the obligations will be paid within one year.

Put Option

On May 4, 2015, we entered into a put agreement in the ordinary course of business that grants an independent third party the unilateral option to require us to purchase a property, at a predetermined price, until May 4, 2018.  In addition to the $35.0 million purchase price, we would be responsible for transaction and closing costs. There can be no assurance that the counterparty will exercise the option.

Funds from Operations (FFO)

Pursuant to the revised definition of FFO adopted by the Board of Governors of the National Association of Real Estate Investment Trusts (“NAREIT”), we calculate FFO by adjusting net income/(loss) attributable to common unit holders (computed in accordance with GAAP) for gains (or losses) from sales of properties, impairment losses on depreciable consolidated real estate, impairment losses on investments in unconsolidated real estate ventures driven by a measurable decrease in the fair value of depreciable real estate held by the unconsolidated Real Estate Ventures, real estate related depreciation and amortization, and after similar adjustments for unconsolidated Real Estate Ventures. FFO is a non-GAAP financial measure. We believe that the use of FFO combined with the required GAAP presentations, has been beneficial in improving the understanding of operating results of REITs among the investing public and making comparisons of REITs’ operating results more meaningful. We consider FFO to be a useful measure for reviewing comparative operating and financial performance because, by excluding gains or losses related to sales of previously depreciated operating real estate assets and real estate depreciation and amortization, FFO can help the investing public compare the operating performance of a company’s real estate between periods or as compared to other companies. Our computation of FFO may not be comparable to FFO reported by other REITs or real estate companies that do not define the term in accordance with the current NAREIT definition or that interpret the current NAREIT definition differently.

We consider net income, as defined by GAAP, to be the most comparable earnings measure to FFO. While FFO and FFO per unit are relevant and widely used measures of operating performance of REITs, FFO does not represent cash flow from operations or net income as defined by GAAP and should not be considered as alternatives to those measures in evaluating our liquidity or operating performance. We believe that to further understand our performance, FFO should be compared with our reported net income/(loss) attributable to common unit holders and considered in addition to cash flows in accordance with GAAP, as presented in our consolidated financial statements.

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The following table presents a reconciliation of net income attributable to common unit holders to FFO for the three-month periods ended March 31, 2017 and 2016:

	For the three-months ended
	March 31, 2017			March 31, 2016
	(amounts in thousands, except share information)
Net income attributable to common unitholders	$	19,442		$	44,478
Add (deduct):
Amount allocated to unvested restricted unitholders		99			105
Net gain on real estate venture transactions		(14,582	)		(5,929	)
Net gain on disposition of real estate		(7,323	)		(115,456	)
Provision for impairment (a)		2,730			7,390
Depreciation and amortization:
Real property — continuing operations		33,650			33,275
Leasing costs including acquired intangibles — continuing operations		12,118			15,514
Company’s share of unconsolidated real estate ventures		10,240			9,005
Partners’ share of consolidated real estate ventures		(59	)		(59	)
Funds from operations	$	56,315		$	(11,677	)
Funds from operations allocable to unvested restricted shareholders		(198	)		46
Funds from operations available to common share and unit holders (FFO)	$	56,117		$	(11,631	)
Weighted-average shares/units outstanding — basic (b)		176,656,763			176,324,047
Weighted-average shares/units outstanding — fully diluted (b)		177,681,671			176,324,047

(a) In accordance with the NAREIT definition of FFO, impairment on land held for development is excluded.

(b) Weighted-average shares/units outstanding comprise our common shares and partnership units that are outstanding as of the three months ended March 31, 2017 and 2016, respectively.

Item 3. Quantitative and Qualitative Disclosures about Market Risk

Market risk is the exposure to loss resulting from changes in interest rates, commodity prices and equity prices. In pursuing our business plan, the primary market risk to which we are exposed is interest rate risk. Changes in the general level of interest rates prevailing in the financial markets may affect the spread between our yield on invested assets and cost of funds and, in turn, our ability to make distributions or payments to our shareholders. While we have not experienced any significant credit losses, in the event of a significant rising interest rate environment and/or continued economic slowdown, defaults could increase and result in losses to us which would adversely affect our operating results and liquidity.

Interest Rate Risk and Sensitivity Analysis

The analysis below presents the sensitivity of the market value of the Operating Partnership’s financial instruments to selected changes in market rates. The range of changes chosen reflects its view of changes which are reasonably possible over a one-year period. Market values are the present value of projected future cash flows based on the market rates chosen.

Our financial instruments consist of both fixed and variable rate debt. As of March 31, 2017, our consolidated debt consisted of mortgage loans with an outstanding principal balance of $323.8 million and unsecured notes with an outstanding principal balance of $1,375.0 million, all of which are fixed rate borrowings. We also have variable rate debt consisting of trust preferred securities with an outstanding principal balance of $78.6 million and an unsecured term loan with an outstanding principal balance of $250.0 million, all of which have been swapped to fixed rates. All financial instruments were entered into for other than trading purposes and the net market value of these financial instruments is referred to as the net financial position. Changes in interest rates have different impacts on the fixed and variable rate portions of our debt portfolio. A change in interest rates on the fixed portion of the debt portfolio impacts the net financial position, but has no impact on interest incurred or cash flows. A change in interest rates on the variable portion of the debt portfolio impacts the interest incurred and cash flows, but does not impact the net financial position.

If market rates of interest increase by 100 basis points, the fair value of our outstanding fixed-rate mortgage debt would decrease by approximately $14.3 million. If market rates of interest decrease by 100 basis points, the fair value of our outstanding fixed-rate mortgage debt would increase by approximately $15.1 million.

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As of March 31, 2017, based on prevailing interest rates and credit spreads, the fair value of our unsecured notes was $1,382.0 million. For sensitivity purposes, a 100 basis point change in the discount rate equates to a change in the total fair value of our unsecured notes of approximately $13.7 million at March 31, 2017.

From time to time or as the need arises, we use derivative instruments to manage interest rate risk exposures and not for speculative or trading purposes. The total outstanding principal balance of our variable rate debt was approximately $328.6 million at March 31, 2017. The total fair value of our debt was approximately $307.9 million at March 31, 2017. For sensitivity purposes, if market rates of interest increase by 100 basis points the fair value of our variable rate debt would decrease by approximately $20.0 million at March 31, 2017. If market rates of interest decrease by 100 basis points the fair value of our outstanding variable rate debt would increase by approximately $22.1 million.

These amounts were determined solely by considering the impact of hypothetical interest rates on our financial instruments. Due to the uncertainty of specific actions we may undertake to minimize possible effects of market interest rate increases, this analysis assumes no changes in our financial structure.

Item 4.Controls and Procedures

Controls and Procedures (Parent Company)

(a) Evaluation of disclosure controls and procedures. Under the supervision and with the participation of its management, including its principal executive officer and principal financial officer, the Parent Company conducted an evaluation of its disclosure controls and procedures, as such term is defined under Rule 13a-15(e) promulgated under the Securities Exchange Act of 1934, as amended (the Exchange Act), as of the end of the period covered by this quarterly report. Based on this evaluation, the Parent Company’s principal executive officer and principal financial officer have concluded that the Parent Company’s disclosure controls and procedures are effective as of the end of the period covered by this quarterly report.

(b) Changes in internal control over financial reporting. There was no change in the Parent Company’s internal control over financial reporting that occurred during the period covered by this quarterly report that has materially affected, or is reasonably likely to materially affect, the Parent Company’s internal control over financial reporting.

Controls and Procedures (Operating Partnership)

(a) Evaluation of disclosure controls and procedures. Under the supervision and with the participation of its management, including its principal executive officer and principal financial officer, the Operating Partnership conducted an evaluation of its disclosure controls and procedures, as such term is defined under Rule 13a-15(e) promulgated under the Exchange Act as of the end of the period covered by this quarterly report. Based on this evaluation, the Operating Partnership’s principal executive officer and principal financial officer have concluded that the Operating Partnership’s disclosure controls and procedures are effective as of the end of the period covered by this quarterly report.

(b) Changes in internal control over financial reporting. There was no change in the Operating Partnership’s internal control over financial reporting that occurred during the period covered by this quarterly report that has materially affected, or is reasonably likely to materially affect, the Operating Partnership’s internal control over financial reporting.

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Part II. OTHER INFORMATION

Item 1.Legal Proceedings

None.

Item 1A. Risk Factors

In addition to the other information set forth in this Quarterly Report on Form 10-Q, you should carefully consider the following risk factor as well as the other factors discussed in Part I, Item 1A. Risk Factors in our Annual Report on Form 10-K for the fiscal year ended December 31, 2016.

Our development projects are dependent on strategic alliances with unaffiliated third parties

The challenge of managing our strategic alliances is rising.  As our development projects become more complex, the need for trust, collaboration, and equitable risk-sharing is essential to the success of these projects.  The alliances we engage in are driven by the complementary skills and capabilities of our partners. Despite the diligence performed establishing these alliances, our objectives may not completely align with those of our partners throughout the development project or projects. Disagreements with one or more third parties with whom we partner in the development of one or more of the development components may restrict our ability to act exclusively in our own interests. In addition, failure of one or more third parties with whom we partner to fulfill obligations to us could result in delays and increased costs to us associated with finding a suitable replacement partner. Increased costs could require us to revise or abandon our activities entirely with respect to one or more components of the project and, in such event, we would not recover, and would be required to write-off, costs we had capitalized in development.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

(a) None.

(b) Not applicable.

(c) There were no common share repurchases under the Parent Company’s share repurchase program, or other repurchases of equity securities of the Parent Company or the Operating Partnership, during the fiscal quarter ended March 31, 2017. As of March 31, 2017, $32.7 million remained available for repurchases under our share repurchase program.

Item 3. Defaults Upon Senior Securities

None.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

None.

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Item 6.Exhibits

(a) Exhibits

Exhibits No.	Description
1.1	Sales Agency Financing Agreement, dated January 10, 2017, among Brandywine Realty Trust, Brandywine Operating Partnership, L.P. and RBC Capital Markets, LLC (incorporated by reference to Exhibit 1.1 to Brandywine Realty Trust's Current Report on Form 8-K filed on January 10, 2017)
1.2	Sales Agency Financing Agreement, dated January 10, 2017, among Brandywine Realty Trust, Brandywine Operating Partnership, L.P. and Barclays Capital Inc. (incorporated by reference to Exhibit 1.2 to Brandywine Realty Trust's Current Report on Form 8-K filed on January 10, 2017)
1.3	Sales Agency Financing Agreement, dated January 10, 2017, among Brandywine Realty Trust, Brandywine Operating Partnership, L.P. and Jefferies LLC (incorporated by reference to Exhibit 1.3 to Brandywine Realty Trust's Current Report on Form 8-K filed on January 10, 2017)
1.4	Sales Agency Financing Agreement, dated January 10, 2017, among Brandywine Realty Trust, Brandywine Operating Partnership, L.P. and BNY Mellon Capital Markets, LLC (incorporated by reference to Exhibit 1.4 to Brandywine Realty Trust's Current Report on Form 8-K filed on January 10, 2017)
10.1	Form of Performance Unit Award Agreement (incorporated by reference to Exhibit 10.1 to Brandywine Realty Trust's Current Report on Form 8-K filed on March 7, 2017) **
10.2	2017-2019 Performance Share Unit Program (incorporated by reference to Exhibit 10.2 to Brandywine Realty Trust's Current Report on Form 8-K filed on March 7, 2017) **
10.3	Form of Restricted Share Award (President and CEO) (incorporated by reference to Exhibit 10.3 to Brandywine Realty Trust's Current Report on Form 8-K filed on March 7, 2017) **
10.4	Form of Restricted Share Award (Other Executives) (incorporated by reference to Exhibit 10.4 to Brandywine Realty Trust's Current Report on Form 8-K filed on March 7, 2017) **
31.1	Certification of the Chief Executive Officer of Brandywine Realty Trust pursuant to 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934 (filed herewith)
31.2	Certification of the Chief Financial Officer of Brandywine Realty Trust pursuant to 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934 (filed herewith)
31.3	Certification of the Chief Executive Officer of Brandywine Realty Trust, in its capacity as the general partner of Brandywine Operating Partnership, L.P., pursuant to 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934 (filed herewith)
31.4	Certification of the Chief Financial Officer of Brandywine Realty Trust, in its capacity as the general partner of Brandywine Operating Partnership, L.P., pursuant to 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934 (filed herewith)
32.1	Certification of the Chief Executive Officer of Brandywine Realty Trust pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)
32.2	Certification of the Chief Financial Officer of Brandywine Realty Trust pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)
32.3	Certification of the Chief Executive Officer of Brandywine Realty Trust, in its capacity as the general partner of Brandywine Operating Partnership, L.P., pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)

55

32.4

Certification of the Chief Financial Officer of Brandywine Realty Trust, in its capacity as the general partner of Brandywine Operating Partnership, L.P., pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)

101.1

The following materials from the Quarterly Reports on Form 10-Q of Brandywine Realty Trust and Brandywine Operating Partnership, L.P. for the quarter ended March 31, 2017 formatted in XBRL (eXtensible Business Reporting Language): (i) the Consolidated Balance Sheets, (ii) the Consolidated Statements of Operations, (iii) the Consolidated Statement of Equity, (iv) the Consolidated Statements of Cash Flows, and (v) Notes to Consolidated Financial Statements, detailed tagged and filed herewith.

** Management contract or compensatory plan or arrangement.

Exhibits 32.1, 32.2, 32.3 and 32.4 are being furnished and shall not be deemed to be “filed” for purposes of Section 18 of the Exchange Act of 1934, as amended (the “Exchange Act”) or otherwise subject to the liability of that section, nor shall any of such exhibits be deemed to be incorporated by reference in any filing of Brandywine Realty Trust or Brandywine Operating Partnership, L.P. under the Securities Act of 1933, as amended, or the Exchange Act, except as otherwise stated in such filing.

56

SIGNATURES OF REGISTRANT

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

		BRANDYWINE REALTY TRUST (Registrant)
Date:	April 25, 2017	By:	/s/ Gerard H. Sweeney
			Gerard H. Sweeney, President and Chief Executive Officer
			(Principal Executive Officer)
Date:	April 25, 2017	By:	/s/ Thomas E. Wirth
			Thomas E. Wirth, Executive Vice President and Chief Financial Officer
			(Principal Financial Officer)
Date:	April 25, 2017	By:	/s/ Daniel Palazzo
			Daniel Palazzo, Vice President and Chief Accounting Officer
			(Principal Accounting Officer)

57

SIGNATURES OF REGISTRANT

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

		BRANDYWINE OPERATING PARTNERSHIP, L.P. (Registrant) BRANDYWINE REALTY TRUST, as general partner
Date:	April 25, 2017	By:	/s/ Gerard H. Sweeney
			Gerard H. Sweeney, President and Chief Executive Officer
			(Principal Executive Officer)
Date:	April 25, 2017	By:	/s/ Thomas E. Wirth
			Thomas E. Wirth, Executive Vice President and Chief Financial Officer
			(Principal Financial Officer)
Date:	April 25, 2017	By:	/s/ Daniel Palazzo
			Daniel Palazzo, Vice President and Chief Accounting Officer
			(Principal Accounting Officer)

58

Index to Exhibits

Exhibits No.	Description
1.1	Sales Agency Financing Agreement, dated January 10, 2017, among Brandywine Realty Trust, Brandywine Operating Partnership, L.P. and RBC Capital Markets, LLC (incorporated by reference to Exhibit 1.1 to Brandywine Realty Trust's Current Report on Form 8-K filed on January 10, 2017)
1.2	Sales Agency Financing Agreement, dated January 10, 2017, among Brandywine Realty Trust, Brandywine Operating Partnership, L.P. and Barclays Capital Inc. (incorporated by reference to Exhibit 1.2 to Brandywine Realty Trust's Current Report on Form 8-K filed on January 10, 2017)
1.3	Sales Agency Financing Agreement, dated January 10, 2017, among Brandywine Realty Trust, Brandywine Operating Partnership, L.P. and Jefferies LLC (incorporated by reference to Exhibit 1.3 to Brandywine Realty Trust's Current Report on Form 8-K filed on January 10, 2017)
1.4	Sales Agency Financing Agreement, dated January 10, 2017, among Brandywine Realty Trust, Brandywine Operating Partnership, L.P. and BNY Mellon Capital Markets, LLC (incorporated by reference to Exhibit 1.4 to Brandywine Realty Trust's Current Report on Form 8-K filed on January 10, 2017)
10.1	Form of Performance Unit Award Agreement (incorporated by reference to Exhibit 10.1 to Brandywine Realty Trust's Current Report on Form 8-K filed on March 7, 2017) **
10.2	2017-2019 Performance Share Unit Program (incorporated by reference to Exhibit 10.2 to Brandywine Realty Trust's Current Report on Form 8-K filed on March 7, 2017) **
10.3	Form of Restricted Share Award (President and CEO) (incorporated by reference to Exhibit 10.3 to Brandywine Realty Trust's Current Report on Form 8-K filed on March 7, 2017) **
10.4	Form of Restricted Share Award (Other Executives) (incorporated by reference to Exhibit 10.4 to Brandywine Realty Trust's Current Report on Form 8-K filed on March 7, 2017) **
31.1	Certification of the Chief Executive Officer of Brandywine Realty Trust pursuant to 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934 (filed herewith)
31.2	Certification of the Chief Financial Officer of Brandywine Realty Trust pursuant to 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934 (filed herewith)
31.3	Certification of the Chief Executive Officer of Brandywine Realty Trust, in its capacity as the general partner of Brandywine Operating Partnership, L.P., pursuant to 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934 (filed herewith)
31.4	Certification of the Chief Financial Officer of Brandywine Realty Trust, in its capacity as the general partner of Brandywine Operating Partnership, L.P., pursuant to 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934 (filed herewith)
32.1	Certification of the Chief Executive Officer of Brandywine Realty Trust pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)
32.2	Certification of the Chief Financial Officer of Brandywine Realty Trust pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)
32.3	Certification of the Chief Executive Officer of Brandywine Realty Trust, in its capacity as the general partner of Brandywine Operating Partnership, L.P., pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)

59

32.4

Certification of the Chief Financial Officer of Brandywine Realty Trust, in its capacity as the general partner of Brandywine Operating Partnership, L.P., pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)

101.1

The following materials from the Quarterly Reports on Form 10-Q of Brandywine Realty Trust and Brandywine Operating Partnership, L.P. for the quarter ended March 31, 2017 formatted in XBRL (eXtensible Business Reporting Language): (i) the Consolidated Balance Sheets, (ii) the Consolidated Statements of Operations, (iii) the Consolidated Statement of Equity, (iv) the Consolidated Statements of Cash Flows, and (v) Notes to Consolidated Financial Statements, detailed tagged and filed herewith.

** Management contract or compensatory plan or arrangement.

60

EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO

RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES

EXCHANGE ACT OF 1934, AS AMENDED

I, Gerard H. Sweeney, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Brandywine Realty Trust;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15(d)-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: April 25, 2017	/s/ Gerard H. Sweeney
	Gerard H. Sweeney
	President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION PURSUANT TO

RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES

EXCHANGE ACT OF 1934, AS AMENDED

I, Thomas E. Wirth, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Brandywine Realty Trust;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15(d)-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: April 25, 2017	/s/ Thomas E. Wirth
	Thomas E. Wirth
	Executive Vice President and Chief Financial Officer

EX-31.3

Exhibit 31.3

CERTIFICATION PURSUANT TO

RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES

EXCHANGE ACT OF 1934, AS AMENDED

I, Gerard H. Sweeney, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Brandywine Operating Partnership, L.P.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15(d)-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: April 25, 2017	/s/ Gerard H. Sweeney
	Gerard H. Sweeney
	President and Chief Executive Officer

EX-31.4

Exhibit 31.4

CERTIFICATION PURSUANT TO

RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES

EXCHANGE ACT OF 1934, AS AMENDED

I, Thomas E. Wirth, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Brandywine Operating Partnership, L.P.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15(d)-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: April 25, 2017	/s/ Thomas E. Wirth
	Thomas E. Wirth
	Executive Vice President and Chief Financial Officer

EX-32.1

Exhibit 32.1

RULE 13(a)-14(b) CERTIFICATION

PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002*

In connection with the Quarterly Report of Brandywine Realty Trust (the “Company”) on Form 10-Q for the quarter ended March 31, 2017 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Gerard H. Sweeney, President and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Gerard H. Sweeney

Gerard H. Sweeney

President and Chief Executive Officer

Date: April 25, 2017

* A signed original of this written statement required by Section 906 has been provided to Brandywine Realty Trust and will be retained by Brandywine Realty Trust and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

RULE 13(a)-14(b) CERTIFICATION

PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002*

In connection with the Quarterly Report of Brandywine Realty Trust (the “Company”) on Form 10-Q for the quarter ended March 31, 2017 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Thomas E. Wirth, Executive Vice President and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Thomas E. Wirth

Thomas E. Wirth

Executive Vice President and Chief Financial Officer

Date: April 25, 2017

* A signed original of this written statement required by Section 906 has been provided to Brandywine Realty Trust and will be retained by Brandywine Realty Trust and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.3

Exhibit 32.3

RULE 13(a)-14(b) CERTIFICATION

PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002*

In connection with the Quarterly Report of Brandywine Operating Partnership, L.P. (the “Partnership”) on Form 10-Q for the quarter ended March 31, 2017 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Gerard H. Sweeney, President and Chief Executive Officer of Brandywine Realty Trust, the Partnership's sole general partner, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Gerard H. Sweeney

Gerard H. Sweeney

President and Chief Executive Officer

Date: April 25, 2017

* A signed original of this written statement required by Section 906 has been provided to Brandywine Realty Trust and will be retained by Brandywine Realty Trust and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.4

Exhibit 32.4

RULE 13(a)-14(b) CERTIFICATION

PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002*

In connection with the Quarterly Report of Brandywine Operating Partnership, L.P. (the “Partnership”) on Form 10-Q for the quarter ended March 31, 2017 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Thomas E. Wirth, Executive Vice President and Chief Financial Officer of Brandywine Realty Trust, the Partnership's sole general partner, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Thomas E. Wirth

Thomas E. Wirth

Executive Vice President and Chief Financial Officer

Date: April 25, 2017

* A signed original of this written statement required by Section 906 has been provided to Brandywine Realty Trust and will be retained by Brandywine Realty Trust and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Document and Entity Information Document - shares	3 Months Ended
	Mar. 31, 2017	Apr. 21, 2017
Document Information [Line Items]
Entity Registrant Name	BRANDYWINE REALTY TRUST
Entity Central Index Key	0000790816
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		175,327,436
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Document Information [Line Items]
Entity Registrant Name	BRANDYWINE OPERATING PARTNERSHIP, L.P.
Entity Central Index Key	0001060386
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q1
Amendment Flag	false

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Real estate investments:
Operating properties	$ 3,702,204	$ 3,586,295
Accumulated depreciation	(864,196)	(852,476)
Operating real estate investments, net	2,838,008	2,733,819
Construction-in-progress	166,372	297,462
Land held for development	153,268	150,970
Total real estate investments, net	3,157,648	3,182,251
Assets held for sale, net	6,262	41,718
Cash and cash equivalents	234,654	193,919
Accounts receivable, net of allowance of $2,622 and $2,373 in 2017 and 2016, respectively	12,099	12,446
Accrued rent receivable, net of allowance of $13,703 and $13,743 in 2017 and 2016, respectively	152,819	149,624
Investment in Real Estate Ventures, equity method	264,941	281,331
Deferred costs, net	92,425	91,342
Intangible assets, net	64,222	72,478
Other assets	116,792	74,104
Total assets	4,101,862	4,099,213
LIABILITIES AND EQUITY
Mortgage notes payable, net	320,484	321,549
Unsecured term loans, net	248,181	248,099
Unsecured senior notes, net	1,444,006	1,443,464
Accounts payable and accrued expenses	115,079	103,404
Distributions payable	30,047	30,032
Deferred income, gains and rent	30,592	31,620
Acquired lease intangibles, net	16,604	18,119
Liabilities related to assets held for sale	387	81
Other liabilities	16,916	19,408
Total liabilities	2,222,296	2,215,776
Commitments and contingencies
Equity:
6.90% Series E Preferred Shares, $0.01 par value; issued and outstanding- 4,000,000 in 2017 and 2016	40	40
Common Shares of Brandywine Realty Trust's beneficial interest, $0.01 par value; shares authorized 400,000,000; 175,202,404 and 175,140,760 issued and outstanding in 2017 and 2016, respectively	1,752	1,752
Additional paid-in-capital	3,262,459	3,258,870
Deferred compensation payable in common shares	14,244	13,684
Common shares in grantor trust, 936,939 in 2017, 899,457 in 2016	(14,244)	(13,684)
Cumulative earnings	560,422	539,319
Accumulated other comprehensive loss	(457)	(1,745)
Cumulative distributions	(1,961,739)	(1,931,892)
Total Brandywine Realty Trust's equity	1,862,477	1,866,344
Non-controlling interests	17,089	17,093
Total beneficiaries' equity	1,879,566	1,883,437
Total liabilities and beneficiaries' equity	4,101,862	4,099,213
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Real estate investments:
Operating properties	3,702,204	3,586,295
Accumulated depreciation	(864,196)	(852,476)
Operating real estate investments, net	2,838,008	2,733,819
Construction-in-progress	166,372	297,462
Land held for development	153,268	150,970
Total real estate investments, net	3,157,648	3,182,251
Assets held for sale, net	6,262	41,718
Cash and cash equivalents	234,654	193,919
Accounts receivable, net of allowance of $2,622 and $2,373 in 2017 and 2016, respectively	12,099	12,446
Accrued rent receivable, net of allowance of $13,703 and $13,743 in 2017 and 2016, respectively	152,819	149,624
Investment in Real Estate Ventures, equity method	264,941	281,331
Deferred costs, net	92,425	91,342
Intangible assets, net	64,222	72,478
Other assets	116,792	74,104
Total assets	4,101,862	4,099,213
LIABILITIES AND EQUITY
Mortgage notes payable, net	320,484	321,549
Unsecured term loans, net	248,181	248,099
Unsecured senior notes, net	1,444,006	1,443,464
Accounts payable and accrued expenses	115,079	103,404
Distributions payable	30,047	30,032
Deferred income, gains and rent	30,592	31,620
Acquired lease intangibles, net	16,604	18,119
Liabilities related to assets held for sale	387	81
Other liabilities	16,916	19,408
Total liabilities	2,222,296	2,215,776
Commitments and contingencies
Redeemable limited partnership units at redemption value; 1,479,799 issued and outstanding in 2017 and 2016	23,899	23,795
Equity:
6.90% Series E Preferred Shares, $0.01 par value; issued and outstanding- 4,000,000 in 2017 and 2016	96,850	96,850
General Partnership Capital 175,101,033 and 174,688,568 units issued and outstanding in 2016 and 2015, respectively	1,757,455	1,762,764
Accumulated other comprehensive loss	(822)	(2,122)
Total Brandywine Operating Partnership, L.P.'s equity	1,853,483	1,857,492
Non-controlling interest - consolidated real estate ventures	2,184	2,150
Total partners' equity	1,855,667	1,859,642
Total liabilities and beneficiaries' equity	$ 4,101,862	$ 4,099,213

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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Accounts receivable, allowance	$ 2,622	$ 2,373
Accrued rent receivable, allowance	$ 13,703	$ 13,743
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	175,202,404	175,140,760
Common Stock, Shares, Outstanding	175,202,404	175,140,760
Common Shares in Grantor Trust	936,939	899,457
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Accounts receivable, allowance	$ 2,622	$ 2,373
Accrued rent receivable, allowance	$ 13,703	$ 13,743
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	1,479,799	1,479,799
Redeemable Limited Partnership Units Outstanding	1,479,799	1,479,799
General Partners' Capital Account, Units Issued	175,202,404	175,140,760
General Partners' Capital Account, Units Outstanding	175,202,404	175,140,760

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Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenue
Rents	$ 103,332	$ 110,163
Tenant reimbursements	18,535	20,054
Termination fees	1,673	294
Third party management fees, labor reimbursement and leasing	6,485	5,235
Other	895	756
Total revenue	130,920	136,502
Operating expenses
Property operating expenses	36,885	40,879
Real estate taxes	11,749	11,886
Third party management expenses	2,447	2,010
Depreciation and amortization	45,892	48,873
General and administrative expenses	9,425	9,120
Provision for impairment	2,730	7,390
Total operating expenses	109,128	120,158
Operating income	21,792	16,344
Other income (expense)
Interest income	393	320
Interest expense	(21,437)	(23,691)
Interest expense - amortization of deferred financing costs	(634)	(774)
Interest expense - financing obligation	0	(281)
Equity in loss of Real Estate Ventures	(748)	(403)
Net gain on disposition of real estate	7,323	115,456
Net gain on Real Estate Venture transactions	14,582	5,929
Loss on early extinguishment of debt	0	(66,590)
Net income	21,271	46,310
Net income from continuing operations attributable to non-controlling interests - consolidated real estate ventures	(169)	(389)
Net income attributable to non-controlling interests	(169)	(389)
Net income attributable to Brandywine Realty Trust	21,102	45,921
Distribution to preferred shareholders	(1,725)	(1,725)
Nonforfeitable dividends allocated to unvested restricted shareholders	(99)	(105)
Net income attributable to Common Shareholders of Brandywine Realty Trust	$ 19,278	$ 44,091
Basic income per Common Share:
Continuing operations	$ 0.11	$ 0.25
Diluted income per Common Share:
Continuing operations	$ 0.11	$ 0.25
Basic weighted average shares outstanding	175,176,964	174,788,945
Diluted weighted average shares outstanding	176,201,872	175,471,413
Distributions declared per Common Share	$ 0.16	$ 0.15
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Rents	$ 103,332	$ 110,163
Tenant reimbursements	18,535	20,054
Termination fees	1,673	294
Third party management fees, labor reimbursement and leasing	6,485	5,235
Other	895	756
Total revenue	130,920	136,502
Operating expenses
Property operating expenses	36,885	40,879
Real estate taxes	11,749	11,886
Third party management expenses	2,447	2,010
Depreciation and amortization	45,892	48,873
General and administrative expenses	9,425	9,120
Provision for impairment	2,730	7,390
Total operating expenses	109,128	120,158
Operating income	21,792	16,344
Other income (expense)
Interest income	393	320
Interest expense	(21,437)	(23,691)
Interest expense - amortization of deferred financing costs	(634)	(774)
Interest expense - financing obligation	0	(281)
Equity in loss of Real Estate Ventures	(748)	(403)
Net gain on disposition of real estate	7,323	115,456
Net gain on Real Estate Venture transactions	14,582	5,929
Loss on early extinguishment of debt	0	(66,590)
Net income	21,271	46,310
Net income from continuing operations attributable to non-controlling interests - consolidated real estate ventures	(5)	(2)
Net income attributable to Brandywine Realty Trust	21,266	46,308
Distribution to preferred shareholders	(1,725)	(1,725)
Nonforfeitable dividends allocated to unvested restricted shareholders	(99)	(105)
Net income attributable to Common Shareholders of Brandywine Realty Trust	$ 19,442	$ 44,478
Basic income per Common Share:
Continuing operations	$ 0.11	$ 0.25
Diluted income per Common Share:
Continuing operations	$ 0.11	$ 0.25
Basic weighted average shares outstanding	176,656,763	176,324,047
Diluted weighted average shares outstanding	177,681,671	177,006,515
Distributions declared per Common Share	$ 0.16	$ 0.15

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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Net income		$ 21,271	$ 46,310
Comprehensive income:
Unrealized gain (loss) on derivative financial instruments		1,014	(9,405)
Reclassification of realized losses on derivative financial instruments to operations, net	[1]	286	246
Total comprehensive income (loss)		1,300	(9,159)
Comprehensive income		22,571	37,151
Comprehensive income attributable to non-controlling interest		(181)	(309)
Comprehensive income attributable to reporting entity		22,390	36,842
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Net income		21,271	46,310
Comprehensive income:
Unrealized gain (loss) on derivative financial instruments		1,014	(9,405)
Reclassification of realized losses on derivative financial instruments to operations, net	[1]	286	246
Total comprehensive income (loss)		1,300	(9,159)
Comprehensive income		22,571	37,151
Comprehensive income attributable to non-controlling interest		(5)	(2)
Comprehensive income attributable to reporting entity		$ 22,566	$ 37,149

[1] Amounts reclassified from comprehensive income to interest expense within the Consolidated Statements of Operations.

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Consolidated Statements of Beneficiaries' Equity - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Deferred Compensation, Share-based Payments [Member]	Additional Paid-in Capital [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, 2015		4,000,000	174,688,568	745,686
Beginning Balance at Dec. 31, 2015	$ 1,952,091	$ 40	$ 1,747	$ 11,918	$ 3,252,622	$ (11,918)	$ 499,086	$ (5,192)	$ (1,814,378)	$ 18,166
Net income	46,310						45,921			389
Other comprehensive income (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				$ 1,237		(1,237)
Adjustment to Non-controlling Interest					(10)					10
Preferred Share distributions	(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	$ 13,155	3,255,908	(13,155)	545,041	(14,271)	(1,842,450)	18,273
Beginning Balance, Shares at Dec. 31, 2016		4,000,000	175,140,760	899,457
Beginning Balance at Dec. 31, 2016	1,883,437	$ 40	$ 1,752	$ 13,684	3,258,870	(13,684)	539,319	(1,745)	(1,931,892)	17,093
Net income	21,271						21,102			169
Other comprehensive income (loss)	1,300							1,288		12
Issuance of partnership interest in consolidated real estate venture	29									29
Equity issuance costs	(219)				(219)
Bonus share issuance, Shares			6,752
Bonus share issuance	110				110
Share-based compensation activity, Shares			56,669	39,870
Share-based compensation activity	3,770				3,769		1
Share Issuance from/(to) Deferred Compensation Plan, Shares			(354)	(2,388)
Share Issuance from/(to) Deferred Compensation Plan	(48)			$ 560	(48)	(560)
Share Choice Plan Issuance, Shares			(1,423)
Adjustment to Non-controlling Interest					(23)					23
Preferred Share distributions	(1,725)								(1,725)
Distributions declared	(28,359)								(28,122)	(237)
Ending Balance, Shares at Mar. 31, 2017		4,000,000	175,202,404	936,939
Ending Balance at Mar. 31, 2017	$ 1,879,566	$ 40	$ 1,752	$ 14,244	$ 3,262,459	$ (14,244)	$ 560,422	$ (457)	$ (1,961,739)	$ 17,089

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Consolidated Statements of Beneficiaries' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Distributions declared per Common Share	$ 0.16	$ 0.15
Cumulative Distributions [Member]
Distributions declared per Common Share	0.16	0.15
Noncontrolling Interest [Member]
Distributions declared per Common Share	$ 0.16	$ 0.15

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Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income	$ 21,271	$ 46,310
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	45,892	48,873
Amortization of deferred financing costs	634	774
Amortization of debt discount/(premium), net	362	382
Amortization of stock compensation costs	3,124	2,296
Straight-line rent income	(5,895)	(6,104)
Amortization of acquired above (below) market leases, net	(1,338)	(2,232)
Straight-line ground rent expense	22	22
Provision for doubtful accounts	707	215
Net gain on real estate venture transactions	(14,582)	(5,929)
Net gain on sale of interests in real estate	(7,323)	(115,456)
Loss on early extinguishment of debt	0	66,590
Provision for impairment	2,730	7,390
Real Estate Venture loss in excess of distributions	748	723
Deferred financing obligation	0	(253)
Changes in assets and liabilities:
Accounts receivable	(917)	246
Other assets	(10,926)	(9,193)
Accounts payable and accrued expenses	9,089	6,296
Deferred income, gains and rent	(3,333)	(2,308)
Other liabilities	(6)	552
Net cash provided by operating activities	40,259	39,194
Cash flows from investing activities:
Proceeds from the sale of properties	74,159	704,911
Proceeds from real estate venture sales	27,230	4,812
Capital expenditures for tenant improvements	(11,408)	(13,949)
Capital expenditures for redevelopments	(5,505)	(6,199)
Capital expenditures for developments	(21,156)	(54,405)
Advances for the purchase of tenant assets, net of repayments	997	360
Investment in unconsolidated Real Estate Ventures	(4,910)	(14,414)
Deposits for real estate	268	(2,275)
Escrowed cash	(32,009)	6,991
Cash distribution from unconsolidated Real Estate Ventures in excess of cumulative equity income	8,306	1,436
Leasing costs paid	(4,129)	(4,716)
Net cash provided by investing activities	31,843	622,552
Cash flows from financing activities:
Repayments of mortgage notes payable	(1,215)	(267,172)
Proceeds from credit facility borrowings	0	195,000
Repayments of credit facility borrowings	0	(195,000)
Debt financing costs paid	0	(72)
Proceeds from the exercise of stock options	0	826
Shares used for employee taxes upon vesting of share awards	(129)	(289)
Partner contributions to consolidated real estate venture	29	18
Distributions paid to shareholders	(29,815)	(28,004)
Distributions to non-controlling interest	(237)	(230)
Net cash used in financing activities	(31,367)	(294,923)
Increase in cash and cash equivalents	40,735	366,823
Cash and cash equivalents at beginning of year	193,919	56,694
Cash and cash equivalents at end of period	234,654	423,517
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the three months ended March 31, 2017 and 2016 of $1,709 and $3,671, respectively	11,268	13,656
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid	30,047	28,278
Change in investment in real estate ventures as a result of dispositions	12,549	(1,130)
Change in investment in real estate ventures related to non-cash disposition of property	0	(25,165)
Change in capital expenditures financed through accounts payable at period end	1,273	4,235
Change in capital expenditures financed through retention payable at period end	(199)	753
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Cash flows from operating activities:
Net income	21,271	46,310
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	45,892	48,873
Amortization of deferred financing costs	634	774
Amortization of debt discount/(premium), net	362	382
Amortization of stock compensation costs	3,124	2,296
Straight-line rent income	(5,895)	(6,104)
Amortization of acquired above (below) market leases, net	(1,338)	(2,232)
Straight-line ground rent expense	22	22
Provision for doubtful accounts	707	215
Net gain on real estate venture transactions	(14,582)	(5,929)
Net gain on sale of interests in real estate	(7,323)	(115,456)
Loss on early extinguishment of debt	0	66,590
Provision for impairment	2,730	7,390
Real Estate Venture loss in excess of distributions	748	723
Deferred financing obligation	0	(253)
Changes in assets and liabilities:
Accounts receivable	(917)	246
Other assets	(10,926)	(9,193)
Accounts payable and accrued expenses	9,089	6,296
Deferred income, gains and rent	(3,333)	(2,308)
Other liabilities	(6)	552
Net cash provided by operating activities	40,259	39,194
Cash flows from investing activities:
Proceeds from the sale of properties	74,159	704,911
Proceeds from real estate venture sales	27,230	4,812
Capital expenditures for tenant improvements	(11,408)	(13,949)
Capital expenditures for redevelopments	(5,505)	(6,199)
Capital expenditures for developments	(21,156)	(54,405)
Advances for the purchase of tenant assets, net of repayments	997	360
Investment in unconsolidated Real Estate Ventures	(4,910)	(14,414)
Deposits for real estate	268	(2,275)
Escrowed cash	(32,009)	6,991
Cash distribution from unconsolidated Real Estate Ventures in excess of cumulative equity income	8,306	1,436
Leasing costs paid	(4,129)	(4,716)
Net cash provided by investing activities	31,843	622,552
Cash flows from financing activities:
Repayments of mortgage notes payable	(1,215)	(267,172)
Proceeds from credit facility borrowings	0	195,000
Repayments of credit facility borrowings	0	(195,000)
Debt financing costs paid	0	(72)
Proceeds from the exercise of stock options	0	826
Shares used for employee taxes upon vesting of share awards	(129)	(289)
Partner contributions to consolidated real estate venture	29	18
Distributions paid to shareholders	(30,052)	(28,234)
Net cash used in financing activities	(31,367)	(294,923)
Increase in cash and cash equivalents	40,735	366,823
Cash and cash equivalents at beginning of year	193,919	56,694
Cash and cash equivalents at end of period	234,654	423,517
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the three months ended March 31, 2017 and 2016 of $1,709 and $3,671, respectively	11,268	13,656
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid	30,047	28,278
Change in investment in real estate ventures as a result of dispositions	12,549	(1,130)
Change in investment in real estate ventures related to non-cash disposition of property	0	(25,165)
Change in capital expenditures financed through accounts payable at period end	1,273	4,235
Change in capital expenditures financed through retention payable at period end	$ (199)	$ 753

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Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Supplemental disclosure:
Capitalized interest	$ 1,709	$ 3,671
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Supplemental disclosure:
Capitalized interest	$ 1,709	$ 3,671

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Consolidated Statements of Partners' Equity - USD ($) $ in Thousands	Total	BRANDYWINE OPERATING PARTNERSHIP, L.P.	General Partner Capital [Member] BRANDYWINE OPERATING PARTNERSHIP, L.P.	Series E-linked Preferred Stock [Member] BRANDYWINE OPERATING PARTNERSHIP, L.P.	Accumulated Other Comprehensive Loss [Member]	Accumulated Other Comprehensive Loss [Member] BRANDYWINE OPERATING PARTNERSHIP, L.P.	Noncontrolling Interest [Member]	Noncontrolling Interest [Member] BRANDYWINE OPERATING PARTNERSHIP, L.P.
Beginning Balance at Dec. 31, 2015		$ 1,929,977	$ 1,836,692	$ 96,850		$ (5,597)		$ 2,032
Beginning Balance, Shares at Dec. 31, 2015			174,688,568	4,000,000
Net income	$ 46,310	46,310	$ 46,308				$ 389	2
Other comprehensive income (loss)	(9,159)	(9,159)			$ (9,079)	(9,159)	(80)
Share Issuance from/(to) Deferred Compensation Plan, Shares			(8,252)
Issuance of partnership interest in consolidated real estate venture	18	18					18	18
Share-based compensation activity	3,332	3,332	$ 3,332
Share-based compensation activity, Shares			210,116
Adjustment of redeemable partnership units to liquidation value at period end		(401)	$ (401)
Adjustment to non-controlling interest						1		(1)
Distribution to preferred shareholders	(1,725)	(1,725)	(1,725)
Distributions to general partnership unitholders		(26,347)	(26,347)
Ending Balance at Mar. 31, 2016		1,942,005	$ 1,857,859	$ 96,850		(14,755)		2,051
Ending Balance, Shares at Mar. 31, 2016			174,890,432	4,000,000
Beginning Balance at Dec. 31, 2016		1,859,642	$ 1,762,764	$ 96,850		(2,122)		2,150
Beginning Balance, Shares at Dec. 31, 2016			175,140,760	4,000,000
Net income	21,271	21,271	$ 21,266				169	5
Other comprehensive income (loss)	1,300	1,300			$ 1,288	1,300	12
Share Issuance from/(to) Deferred Compensation Plan	(48)	(48)	$ (48)
Share Issuance from/(to) Deferred Compensation Plan, Shares			(354)
Issuance of LP Units		(219)	$ (219)
Issuance of partnership interest in consolidated real estate venture	29	29					$ 29	29
Share Choice Plan Issuance, Shares			(1,423)
Bonus share issuance	110	110	$ 110
Bonus share issuance, Shares			6,752
Share-based compensation activity	3,770	3,769	$ 3,769
Share-based compensation activity, Shares			56,669
Adjustment of redeemable partnership units to liquidation value at period end		(340)	$ (340)
Distribution to preferred shareholders	$ (1,725)	(1,725)	(1,725)
Distributions to general partnership unitholders		(28,122)	(28,122)
Ending Balance at Mar. 31, 2017		$ 1,855,667	$ 1,757,455	$ 96,850		$ (822)		$ 2,184
Ending Balance, Shares at Mar. 31, 2017			175,202,404	4,000,000

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Consolidated Statements of Partners' Equity (Parenthetical) - BRANDYWINE OPERATING PARTNERSHIP, L.P. - $ / shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Distributions to general partnership unitholders (USD per share)	$ 0.16	$ 0.15
General Partner Capital [Member]
Distributions to general partnership unitholders (USD per share)	$ 0.16	$ 0.15

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Organization of the Parent Company and The Operating Partnership

3 Months Ended

Mar. 31, 2017

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, residential, 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, 2017, owned a 99.2% 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, 2017, the Company owned 104 properties that contain an aggregate of approximately 16.5 million net rentable square feet and consist of 90 office properties, six mixed-use properties, one retail property (97 properties, collectively the “Core Properties”), three development properties, three redevelopment properties and one property classified as held for sale (collectively, the “Properties”).  In addition, as of March 31, 2017, the Company owned economic interests in 13 unconsolidated real estate ventures (collectively, the “Real Estate Ventures”), seven of which own properties that contain an aggregate of approximately 8.0 million net rentable square feet of office space; two of which own 4.3 acres of undeveloped parcels of land; two of which own 1.4 acres of land under active development and two of which own residential towers that contain 345 and 321 apartment units, respectively. As of March 31, 2017, the Company also owned 312 acres of undeveloped land and held options to purchase approximately 60 additional acres of undeveloped land.  As of March 31, 2017, the total potential development that these land parcels could support, including the parcels under option, under current zoning and entitlements, amounted to an estimated 12.2 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 and Austin, Texas. In addition to managing properties owned by the Company, as of March 31, 2017, the Company was managing approximately 10.2 million net rentable square feet of office and industrial properties for third parties and 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, 2017, the management company subsidiaries were managing properties containing an aggregate of approximately 26.7 million net rentable square feet, of which approximately 16.5 million net rentable square feet related to Properties owned by the Company and approximately 10.2 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.

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Basis of Presentation

3 Months Ended

Mar. 31, 2017

Accounting Policies [Abstract]

BASIS OF PRESENTATION

2. BASIS OF PRESENTATION

Basis of Presentation

The consolidated financial statements have been prepared by the Company pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) for interim financial statements. Certain information and footnote disclosures normally included in the annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP") have been condensed or omitted pursuant to such rules and regulations. In the opinion of management, all adjustments (consisting solely of normal recurring matters) for a fair statement of the financial position of the Company as of March 31, 2017, the results of its operations for the three-month periods ended March 31, 2017 and 2016 and its cash flows for the three-month periods ended March 31, 2017 and 2016 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 2016 Annual Report on Form 10-K filed with the SEC on March 1, 2017.

The Company's Annual Report on Form 10-K for the year ended December 31, 2016 contains a discussion of our significant accounting policies under Note 2, "Summary of Significant Accounting Policies". There have been no significant changes in our significant accounting policies since December 31, 2016. Management discusses our significant accounting policies and management’s judgments and estimates with the Company's Audit Committee.

Reclassifications

During the first quarter of 2017, the Company adopted ASU 2016-09, Improvements to Employee Share-Based Payment Accounting (“ASU 2016-09”), which requires the Company to reclassify employer tax payments on account of employee tax withholdings on share-based awards from operating activities to financing activities.  Prior to the issuance of ASU 2016-09, there was no guidance on the classification of cash paid by an employer to the taxing authorities when directly withholding shares for tax withholding purposes. As a result of the adoption, a $0.3 million cash outflow has been reclassified in the March 31, 2016 consolidated statements of cash flows from operating activities to financing activities. There was no other impact from the adoption of this guidance.  

During the quarter ended December 31, 2016, the Company early adopted ASU 2016-15, “Classification of Certain Cash Receipts and Cash Payments” (“ASU 2016-15”), which clarifies that debt prepayment costs should be presented as financing activities in the statement of cash flows. As a result of the adoption, $53.4 million was reclassified in the consolidated statements of cash flows from the operating activities section to the financing activities section of the consolidated statements of cash flows, within the “Repayment of mortgage notes payable” caption, for the three-months period ended March 31, 2016. There was no other impact from the adoption of this guidance.

Recent Accounting Pronouncements

On February 22, 2017, the FASB issued ASU No. 2017-05 (“ASU 2017-05) to provide guidance for recognizing gains and losses from the transfer of nonfinancial assets and in-substance non-financial assets in contracts with non-customers, unless other specific guidance applies. The standard requires a company to derecognize nonfinancial assets once it transfers control of a distinct nonfinancial asset or distinct in substance nonfinancial asset. Additionally, when a company transfers its controlling interest in a nonfinancial asset, but retains a noncontrolling ownership interest, the company is required to measure any non-controlling interest it receives or retains at fair value. The guidance requires companies to recognize a full gain or loss on the transaction. As a result of the new guidance, the guidance specific to real estate sales in ASC 360-20 will be eliminated. As such, sales and partial sales of real estate assets will now be subject to the same derecognition model as all other nonfinancial assets. The guidance is effective for annual periods beginning after December 15, 2017, including interim periods within that reporting period. The effective date of this guidance coincides with revenue recognition guidance. The Company is in the process of evaluating the impact of this new guidance and on its consolidated financial statements. The Company expects to utilize the modified retrospective approach.

On January 5, 2017, the FASB issued ASU No. 2017-01 (“ASU 2017-01”) to amend the guidance for determining whether a transaction involves the purchase or disposal of a business or an asset. The amendments clarify that when substantially all of the fair value of the gross assets acquired or disposed of is concentrated in a single identifiable asset or a group of similar assets, the set of assets and activities is not a business. ASU 2017-01 is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years and early adoption is permitted for transactions which have not been previously reported in financial statements that have been issued. The Company adopted the guidance on the issuance date effective January 2017. The Company expects that most of its real estate acquisitions will be considered asset acquisitions under the new guidance and that transaction costs will be capitalized to the investment basis which is then subject to a purchase price allocation based on relative fair value.

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Real Estate Investments

3 Months Ended

Mar. 31, 2017

Real Estate [Abstract]

REAL ESTATE INVESTMENTS

3. REAL ESTATE INVESTMENTS

As of March 31, 2017 and December 31, 2016, the gross carrying value of the Properties was as follows (in thousands):

	March 31,		December 31,
	2017		2016
Land	$	462,014	$	469,522
Building and improvements		2,801,495		2,683,087
Tenant improvements		438,695		433,686
Operating properties		3,702,204		3,586,295
Assets held for sale - real estate investments (a)		5,576		73,591
Total	$	3,707,780	$	3,659,886

(a) Real estate investments related to assets held for sale above represents gross real estate assets and does not include accumulated depreciation or other assets on the balance sheet of the property held for sale. See “Held for Sale” below in this Note 3.

Dispositions

The Company sold the following eight office properties and one mixed-use property during the three-month period ended March 31, 2017 (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)
March 30, 2017	200, 210 & 220 Lake Drive East (Woodland Falls)	Cherry Hill, NJ	3		215,465	$	19,000	$	17,771	$	(249	)	(b)
March 15, 2017	Philadelphia Marine Center (Marine Piers)	Philadelphia, PA	1		181,900		21,400		11,182		6,498		(c)
March 13, 2017	11700, 11710, 11720 & 11740 Beltsville Drive (Calverton)	Beltsville, MD	3		313,810		9,000		8,354		-		(d)
February 2, 2017	1200 & 1220 Concord Avenue (Concord Airport Plaza)	Concord, CA	2		350,256		33,100		32,010		551		(e)
Total Dispositions			9		1,061,431	$	82,500	$	69,317	$	6,800

(a) Gain/(Loss) on Sale is net of closing and other transaction related costs.

(b) During the fourth quarter of 2016, the Company recognized a $7.3 million impairment related to these properties.

(c) On March 15, 2017, the Company sold its sublease interest in the Piers at Penn’s Landing (the “Marine Piers”), which includes leasehold improvements containing 181,900 net rentable square feet, and a marina, located in Philadelphia, Pennsylvania for a sales price of $21.4 million, which will be paid in two installments. On the closing date, the buyer paid $12.0 million in cash. On the second purchase price installment date, the buyer will pay $9.4 million. The second purchase price installment is due on (a) January 31, 2020, in the event that the tenant at the Marine Piers does not exercise its existing option to extend the term of the sublease or (b) January 15, 2024, in the event that the tenant does exercise its current extension option to extend the term of the sublease. In accordance with ASC 360-20, Real Estate Sales, the Company determined that it is appropriate to account for the sales transaction under the cost recovery method. The Company received cash proceeds of $11.2 million, after closing costs and prorations, and the net book value of the Marine Piers was $4.7 million, resulting in a gain on sale of $6.5 million. The remaining gain on sale of $9.4 million will be recognized on the second purchase price installment date. The Marine Piers was classified as mixed-use within our property count.

(d) During the fourth quarter of 2016, the Company recognized a $3.0 million impairment related to these properties. During the first quarter of 2017, there was a price reduction of $1.7 million under the agreement of sale and an additional impairment of $1.7 million was recognized.

(e) This sale is designated as a like-kind exchange under Section 1031 of the Internal Revenue Code (“IRC”) and, as such, the proceeds, totaling $32.0 million after closing costs and prorations, were deposited with a Qualified Intermediary, as defined under the IRC. The proceeds received at closing were recorded as “Other assets” in the Company’s consolidated balance sheet as of March 31, 2017. During the fourth quarter of 2016, the Company recognized a $11.5 million impairment related to these properties.

In addition to the amounts in the table above, the Company recorded $0.5 million gain during the first quarter of 2017 from the receipt of additional cash from the disposition of Cira Square during 2016. For further information relating to this sale, see Note 3, “Real Estate Investments,” in the notes to the audited financial statements included in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2016.

The Company sold the following land parcels during the three-month period ended March 31, 2017 (dollars in thousands):

Disposition Date	Property/Portfolio Name	Location	Number of Parcels		Acres		Sales Price		Net Proceeds on Sale		Gain on Sale
February 15, 2017	Gateway Land C	Richmond, VA		1		4.8	$	1,100	$	1,043	$	-	(a)
January 30, 2017	Garza Ranch	Austin, TX		1		1.7		3,500		3,277		-	(b)
Total Dispositions				2		6.5	$	4,600	$	4,320	$	-

(a) During the fourth quarter of 2016, the Company recognized a nominal impairment related to this land parcel.

(b) The Company has a continuing involvement through a completion guaranty, which requires the Company as developer to complete certain infrastructure improvements on behalf of the buyers of the land parcels. The cash received at settlement was recorded as “Deferred income, gains and rent” on the Company’s consolidated balance sheet and the Company will recognize the sale once the infrastructure improvements are complete. See Item 2., “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Contractual Obligations” for further discussion of the infrastructure improvements.

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. Accordingly, the operating results of these properties remain classified within continuing operations for all periods presented.

Held for Sale

The following is a summary of one property classified as held for sale but which did not meet the criteria to be classified within discontinued operations at March 31, 2017 (in thousands):

	Held for Sale Property Included in Continuing Operations
	March 31, 2017
	Other Segment - Retail
ASSETS HELD FOR SALE
Real estate investments:
Operating properties	$	5,576
Accumulated depreciation		(79	)
Operating real estate investments, net		5,497
Land held for development		-
Total real estate investments, net		5,497
Other assets		765
Total assets held for sale, net	$	6,262
LIABILITIES HELD FOR SALE
Other liabilities	$	387
Total liabilities held for sale	$	387

As the fair value less anticipated costs to sell exceeded the carrying value for the property included in the above table, no provision for impairment was recorded. The fair value measurement is based on pricing in the purchase and sale agreement for the property. As the pricing in the purchase and sale agreement is unobservable, the Company determined that the input utilized to determine fair value for the property falls within Level 3 in accordance with the fair value hierarchy established by Accounting Standards Codification (ASC) Topic 820, “Fair Value Measurements and Disclosures”.

The sale of the held for sale property does not represent a strategic shift that has a major effect on the Company's operations and financial results. As a result, the operating results of the property remains classified within continuing operations for all periods presented.

Held for Use Impairment

As of March 31, 2017, the Company evaluated the recoverability of the carrying value of its properties that triggered assessment under the undiscounted cash flow model. Based on the Company’s evaluation, it was determined that due to the reduction in the Company’s intended hold period of four properties located in the Other segment, the Company would not recover the carrying values of these properties. Accordingly, the Company recorded impairment charges on these properties of $1.0 million at March 31, 2017, reducing the aggregate carrying values of the properties from $10.2 million to their estimated fair value of $9.2 million. The Company measured these impairments based on a discounted cash flow analysis, using a hold period of 10 years and residual capitalization rates and discount rates of 9.00% and 9.25%, respectively. The results were comparable to indicative pricing in the market. The assumptions used to determine fair value under the income approach are Level 3 inputs in accordance with the fair value hierarchy established by Accounting Standards Codification (ASC) Topic 820, “Fair Value Measurements and Disclosures.”

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Investment in Unconsolidated Real Estate Ventures

3 Months Ended

Mar. 31, 2017

Equity Method Investments And Joint Ventures [Abstract]

INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES

4. INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES

As of March 31, 2017, the Company held ownership interests in 13 unconsolidated Real Estate Ventures for an aggregate investment balance of $264.9 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, 2017, seven of the real estate ventures owned properties that contain an aggregate of approximately 8.0 million net rentable square feet of office space; two real estate ventures owned 4.3 acres of undeveloped parcels of land; two real estate ventures owned 1.4 acres of land under active development and two real estate ventures owned residential towers that contain 345 and 321 apartment units, respectively.

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 in each of the three-month periods ended March 31, 2017 and 2016. The Company has outstanding accounts receivable balances from its Real Estate Ventures of $1.6 million and $1.4 million as of March 31, 2017 and December 31, 2016, 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 in which the Company held interests as of March 31, 2017 and December 31, 2016 (in thousands):

	March 31, 2017		December 31, 2016
Net property	$	1,405,986	$	1,483,067
Other assets		210,032		231,972
Other liabilities		107,161		129,486
Debt, net		946,891		989,738
Equity		561,966		595,815
Company’s share of equity (Company’s basis) (a)	$	264,941	$	281,331

(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.

The following is a summary of results of operations of the Real Estate Ventures in which the Company held interests during the three-month periods ended March 31, 2017 and 2016 (in thousands):

	Three-month periods ended March 31,
	2017			2016
Revenue	$	54,279		$	46,525
Operating expenses		(25,166	)		(26,668	)
Interest expense, net		(10,830	)		(8,989	)
Depreciation and amortization		(20,761	)		(20,160	)
Net loss (a)	$	(2,478	)	$	(9,292	)
Equity in loss of Real Estate Ventures	$	(748	)	$	(403	)

(a) The three-month period ended March 31, 2016 amount includes $6.4 million of acquisition deal costs related to the formation of the MAP Venture during the three-month period ended March 31, 2016.

The Parc at Plymouth Meeting Venture

On January 31, 2017, the Company sold its 50% interest in TB-BDN Plymouth Apartments, L.P., a 50/50 real estate venture with Toll Brothers, at a gross sales value of $100.5 million, of which the Company was allocated 50% for its interest.  The venture developed and operates a 398-unit multi-family complex in Plymouth Meeting, Pennsylvania encumbered by a $54.0 million construction loan. The construction loan was repaid commensurate with the sale of the Company’s 50% interest. As a result, the Company is no longer subject to a $3.2 million payment guarantee on the construction loan. The cash proceeds, after the payment of the Company’s share of the debt and closing costs, were $27.2 million.  The carrying amount of the Company’s investment at the time of sale was $12.6 million, resulting in a $14.6 million gain on sale of interest in the real estate venture.

Guarantees

As of March 31, 2017, the Company’s unconsolidated real estate ventures had aggregate indebtedness to third parties of $953.8 million.  These loans are generally mortgage or construction loans, most of which are non-recourse to the Company.  As of March 31, 2017, the loans for which there is recourse to the Company consists of the following: (i) a $55.4 million payment guaranty on the term loan for evo at Cira; (ii) a joint and several cost overrun guaranty on the $88.9 million construction loan for the development project being undertaken by 1919 Market Street LP; and (iii) a $0.4 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, included their indebtedness, see Note 4, "Investment in Unconsolidated Real Estate Ventures," in the notes to the audited financial statements included in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2016.

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Intangible Assets and Liabilities

3 Months Ended

Mar. 31, 2017

Goodwill And Intangible Assets Disclosure [Abstract]

INTANGIBLE ASSETS AND LIABILITIES

5. INTANGIBLE ASSETS AND LIABILITIES

As of March 31, 2017 and December 31, 2016, the Company’s intangible assets/liabilities were comprised of the following (in thousands):

	March 31, 2017
	Total Cost		Accumulated Amortization			Intangible Assets, net
Intangible assets, net:
In-place lease value	$	114,196	$	(54,834	)	$	59,362
Tenant relationship value		13,036		(10,378	)		2,658
Above market leases acquired		4,703		(2,501	)		2,202
Total intangible assets, net	$	131,935	$	(67,713	)	$	64,222
Acquired lease intangibles, net:
Below market leases acquired	$	30,683	$	(14,079	)	$	16,604

	December 31, 2016
	Total Cost		Accumulated Amortization			Intangible Assets, net
Intangible assets, net:
In-place lease value	$	142,889	$	(75,696	)	$	67,193
Tenant relationship value		13,074		(10,167	)		2,907
Above market leases acquired		4,718		(2,340	)		2,378
Total intangible assets, net	$	160,681	$	(88,203	)	$	72,478
Acquired lease intangibles, net:
Below market leases acquired	$	37,579	$	(19,460	)	$	18,119

As of March 31, 2017, the Company’s annual amortization for its intangible assets/liabilities, assuming no prospective early lease terminations, are as follows (dollars in thousands):

	Assets		Liabilities
2017 (nine months remaining)	$	11,409	$	1,809
2018		11,754		2,196
2019		10,536		1,885
2020		8,457		1,337
2021		5,971		807
Thereafter		16,095		8,570
Total	$	64,222	$	16,604

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Debt Obligations

3 Months Ended

Mar. 31, 2017

Debt Disclosure [Abstract]

DEBT OBLIGATIONS

6. DEBT OBLIGATIONS

The following table sets forth information regarding the Company’s consolidated debt obligations outstanding at March 31, 2017 and December 31, 2016 (in thousands):

	March 31, 2017			December 31, 2016			Effective Interest Rate				Maturity Date
MORTGAGE DEBT:
Two Logan Square	$	85,625		$	86,012			3.98	%		May 2020
One Commerce Square		126,198			127,026			3.64	%	(a)	Apr 2023
Two Commerce Square		112,000			112,000			4.51	%	(b)	Apr 2023
Principal balance outstanding		323,823			325,038
Plus: fair market value premium (discount), net		(2,652	)		(2,761	)
Less: deferred financing costs		(687	)		(728	)
Mortgage indebtedness	$	320,484		$	321,549
UNSECURED DEBT
Seven-Year Term Loan - Swapped to fixed	$	250,000		$	250,000			3.72	%		Oct 2022
$300.0M 5.70% Guaranteed Notes due 2017		300,000			300,000			5.68	%		May 2017
$325.0M 4.95% Guaranteed Notes due 2018		325,000			325,000			5.13	%		Apr 2018
$250.0M 3.95% Guaranteed Notes due 2023		250,000			250,000			4.02	%		Feb 2023
$250.0M 4.10% Guaranteed Notes due 2024		250,000			250,000			4.33	%		Oct 2024
$250.0M 4.55% Guaranteed Notes due 2029		250,000			250,000			4.60	%		Oct 2029
Indenture IA (Preferred Trust I)		27,062			27,062			2.75	%		Mar 2035
Indenture IB (Preferred Trust I)		25,774			25,774			3.30	%		Apr 2035
Indenture II (Preferred Trust II)		25,774			25,774			3.09	%		Jul 2035
Principal balance outstanding		1,703,610			1,703,610
Plus: original issue premium (discount), net		(4,424	)		(4,678	)
Less: deferred financing costs		(6,999	)		(7,369	)
Total unsecured indebtedness	$	1,692,187		$	1,691,563
Total Debt Obligations	$	2,012,671		$	2,013,112

(a) This loan was assumed upon acquisition of the related properties on December 19, 2013. On December 29, 2015, the Company refinanced the debt increasing the principal balance to $130.0 million and extended the term of the scheduled maturity from January 6, 2016 to April 5, 2023.  The effective interest rate as of December 31, 2015 was 3.64%.  A default under this loan will also constitute a default under the loan outstanding on Two Commerce Square. This loan is also secured by a lien on Two Commerce Square.

(b) This loan was assumed upon acquisition of the related property on December 19, 2013. The interest rate reflects the market rate at the time of acquisition. A default under this loan will also constitute a default under the loan outstanding on One Commerce Square. This loan is also secured by a lien on One Commerce Square.

As of March 31, 2017 and December 31, 2016,the Company’s weighted-average effective interest rates on its mortgage notes payable were both 4.03%. As of March 31, 2017 and December 31, 2016, the net carrying value of the Company’s Properties that are encumbered by mortgage indebtedness was $323.8 million and $325.0 million, respectively.

On May 15, 2015, the Company closed on a new four-year unsecured revolving credit facility that provides for borrowings of up to $600.0 million. The Company had no borrowings under its unsecured revolving credit facility as of and during either of the three-month periods ended March 31, 2017 and March 31, 2016.

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, 2017. Management continuously monitors the Company’s compliance with and anticipated compliance with the covenants. Certain of the covenants restrict the Company’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.

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Fair Value of Financial Instruments

3 Months Ended

Mar. 31, 2017

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, 2017 and December 31, 2016, 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, 2017 and December 31, 2016 approximate the fair values for cash and cash equivalents, accounts receivable, other assets (except for the note receivable disclosed below), 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, 2017				December 31, 2016
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Unsecured notes payable	$	1,365,398	$	1,381,975	$	1,364,854	$	1,372,758
Variable rate debt	$	326,789	$	307,917	$	326,709	$	307,510
Mortgage notes payable	$	320,484	$	327,144	$	321,549	$	328,853
Note receivable (a)	$	3,401	$	3,918	$	3,380	$	3,717

(a) The inputs to originate the loan are unobservable and, as a result, are categorized as Level 3. The Company determined fair value by calculating the present value of the cash payments to be received through the maturity date of the loan. See Note 2, “Summary of Significant Accounting Policies,” to the Company’s 2016 Annual Report on Form 10-K for the year ended December 31, 2016 for further information regarding the note origination.  

The inputs utilized to determine the fair value of the Company’s unsecured notes payable are categorized as Level 2. This is because the Company valued these instruments using quoted market prices as of March 31, 2017 and December 31, 2016.  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 inputs utilized to determine the fair value of the Company’s mortgage notes payable and variable rate debt are categorized as Level 3.  The fair value of the variable rate debt was 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 inputs 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 to calculate fair value as of March 31, 2017 and December 31, 2016 was 4.507% and 4.353%, 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, 2017 and December 31, 2016.  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, 2017, and current estimates of fair value may differ from the amounts presented herein.

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Limited Partners' Non-Controlling Interests in the Parent Company

3 Months Ended

Mar. 31, 2017

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 was $14.9 million at each of March 31, 2017 and December 31, 2016, 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, 2017 and December 31, 2016 was approximately $24.0 million and $24.4 million, respectively.

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Fair Value of Derivative Financial Instruments

3 Months Ended

Mar. 31, 2017

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, 2017 and December 31, 2016. 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 assets and other liabilities on the Company’s consolidated balance sheets).

Hedge Product	Hedge Type	Designation		Notional Amount				Strike			Trade Date	Maturity Date	Fair value
				3/31/2017		12/31/2016							3/31/2017			12/31/2016
Assets
Swap	Interest Rate	Cash Flow	(a)	$	250,000	$	250,000		3.718	%	October 8, 2015	October 8, 2022	$	4,572		$	3,733
Liabilities
Swap	Interest Rate	Cash Flow	(a)		25,774		25,774		3.300	%	December 22, 2011	January 30, 2021		(169	)		(300	)
Swap	Interest Rate	Cash Flow	(a)		25,774		25,774		3.090	%	January 6, 2012	October 30, 2019		(93	)		(214	)
Swap	Interest Rate	Cash Flow	(a)		27,062		27,062		2.750	%	December 21, 2011	September 30, 2017		(37	)		(83	)
				$	328,610	$	328,610

(a) Hedging unsecured variable rate debt.  

The Company measures its derivative instruments at fair value and records them gross in the consolidated balance sheet in other assets or other liabilities. Additionally, the Company recorded its share of the fair value of derivative financial instruments held by its unconsolidated real estate ventures, as of March 31, 2017.

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.

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Beneficiaries Equity of the Parent Company

3 Months Ended

Mar. 31, 2017

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-month periods ended March 31,
	2017						2016
	Basic			Diluted			Basic			Diluted
Numerator
Income from continuing operations	$	21,271		$	21,271		$	46,310		$	46,310
Net income from continuing operations attributable to non-controlling interests		(169	)		(169	)		(389	)		(389	)
Nonforfeitable dividends allocated to unvested restricted shareholders		(99	)		(99	)		(105	)		(105	)
Preferred share dividends		(1,725	)		(1,725	)		(1,725	)		(1,725	)
Net income attributable to common shareholders	$	19,278		$	19,278		$	44,091		$	44,091
Denominator
Weighted-average shares outstanding		175,176,964			175,176,964			174,788,945			174,788,945
Contingent securities/Share based compensation		-			1,024,908			-			682,468
Weighted-average shares outstanding		175,176,964			176,201,872			174,788,945			175,471,413
Earnings per Common Share:
Net income attributable to common shareholders	$	0.11		$	0.11		$	0.25		$	0.25

Redeemable common limited partnership units totaling 1,479,799 and 1,535,102 in March 31, 2017 and March 31, 2016, respectively, 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, 2017 and 2016, 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 1, 2017, the Parent Company declared a distribution of $0.16 per common share, totaling $28.3 million, which was paid on April 19, 2017 to shareholders of record as of April 5, 2017. In addition, the Parent Company declared distributions on its 6.90% Series E Cumulative Redeemable Preferred Shares (NYSE: BDN-PE) (the “Series E Preferred Shares”) to holders of record as of March 30, 2017. 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 17, 2017 to holders of Series E Preferred Shares totaled $1.7 million.

On March 10, 2017, the Parent Company announced its intention to redeem all of its outstanding 4,000,000 Series E Preferred Shares on April 11, 2017. The Series E Preferred Shares were redeemed in full on April 11, 2017 at a redemption price of $25.00 per share with cash from existing cash balances on hand. See Note 15, “Subsequent Events.”

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Partners Equity of The Operating Partnership

3 Months Ended

Mar. 31, 2017

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-month periods ended March 31,
	2017						2016
	Basic			Diluted			Basic			Diluted
Numerator
Income from continuing operations	$	21,271		$	21,271		$	46,310		$	46,310
Nonforfeitable dividends allocated to unvested restricted unitholders		(99	)		(99	)		(105	)		(105	)
Preferred unit dividends		(1,725	)		(1,725	)		(1,725	)		(1,725	)
Net income attributable to non-controlling interests		(5	)		(5	)		(2	)		(2	)
Net income attributable to common unitholders	$	19,442		$	19,442		$	44,478		$	44,478
Denominator
Weighted-average units outstanding		176,656,763			176,656,763			176,324,047			176,324,047
Contingent securities/Share based compensation		-			1,024,908			-			682,468
Total weighted-average units outstanding		176,656,763			177,681,671			176,324,047			177,006,515
Earnings per Common Partnership Unit:
Net income attributable to common unitholders	$	0.11		$	0.11		$	0.25		$	0.25

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, 2017 and 2016, earnings representing nonforfeitable dividends as noted in the table above were allocated to the unvested restricted units issued to the Parent Company in connection with awards 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 1, 2017, the Operating Partnership declared a distribution of $0.16 per common partnership unit, totaling $28.3 million, which was paid on April 19, 2017 to unitholders of record as of April 5, 2017. In addition, the Operating Partnership declared distributions on its Series E-Linked Preferred Mirror Units to holders of record as of March 30, 2017. 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 17, 2017 to holders of Series E-Linked Preferred Mirror Units totaled $1.7 million.

On March 10, 2017, the Parent Company announced its intention to redeem all of its outstanding 4,000,000 Series E Preferred Shares on April 11, 2017. In connection with the redemption, on April 11, 2017, the Operating Partnership redeemed all of its Series E-Linked Preferred Mirror Units at a redemption price of $25.00 per unit with cash from existing cash balances on hand. See Note 15, “Subsequent Events.”

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Share Based Compensation, 401(k) Plan and Deferred Compensation

3 Months Ended

Mar. 31, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

SHARE BASED COMPENSATION, 401(k) PLAN AND DEFERRED COMPENSATION

12. SHARE BASED COMPENSATION, 401(k) PLAN AND DEFERRED COMPENSATION

Restricted Share Awards

As of March 31, 2017, 618,961 restricted shares were outstanding under the Equity Incentive Plan and vest over three years from the initial grant dates. The remaining compensation expense to be recognized at March 31, 2017 was approximately $2.9 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, 2017 and 2016, the Company recognized compensation expense related to outstanding restricted shares of $1.5 million and $1.2 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 share activity during the three months ended March 31, 2017:

	Shares			Weighted Average Grant Date Fair Value		Aggregate Intrinsic Value
Non-vested at January 1, 2017		488,604		$	14.10	$	8,066,852
Granted		141,751			16.68		2,364,127
Vested		(9,394	)		14.90		153,216
Forfeited		(2,000	)		13.58
Non-vested at March 31, 2017		618,961		$	14.68	$	10,045,737

On March 1, 2017, the Compensation Committee of the Parent Company’s Board of Trustees awarded to officers of the Company an aggregate 109,629 restricted common shares, which cliff vest on April 15, 2020. In addition, on March 7, 2017, the Compensation Committee awarded non-officer employees an aggregate 32,122 restricted common shares, which vest in two equal annual installments on April 15 of 2018 and 2019. 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 the Company’s President and Chief Executive Officer, vesting would also accelerate if the Company were to terminate him without cause, or if he were to resign for good reason under his employment agreement. In addition, if the Company 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 share-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 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
	2/23/2015		2/22/2016		3/1/2017		Total
(Amounts below in shares, unless otherwise noted)
Non-vested at January 1, 2017		147,589		231,388		-		378,977
Units Granted		-		-		174,854		174,854
Units Cancelled		-		-		-		-
Non-vested at March 31, 2017		147,589		231,388		174,854		553,831
Measurement Period Commencement Date	1/1/2015		1/1/2016		1/1/2017
Measurement Period End Date	12/31/2017		12/31/2018		12/31/2019
Units Granted		186,395		231,388		174,854
Fair Value of Units on Grant Date (in thousands)	$	3,933	$	3,558	$	3,735

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 share-based compensation, the Company amortizes stock-based compensation costs through the qualifying retirement date for those executives who meet the conditions for qualifying retirement during the schedule vesting period.

For the three months ended March 31, 2017, the Company recognized total compensation expense for the 2017, 2016 and 2015 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.  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.

The remaining compensation expense to be recognized at March 31, 2017 was approximately $2.9 million, and is expected to be recognized over a weighted average remaining vesting period of 1.9 years.

The Company issued 55,299 common shares on February 1, 2017 in settlement of RPSUs that had been awarded on March 11, 2014 and 12, 2014 (with a three-year measurement period ended December 31, 2016). Holders of these RPSUs also received a cash dividend of $0.16 per share for these common shares on February 6, 2017.

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Segment Information

3 Months Ended

Mar. 31, 2017

Segment Reporting [Abstract]

SEGMENT INFORMATION

13. SEGMENT INFORMATION

As of March 31, 2017, the Company managed its portfolio within five segments: (1) Philadelphia Central Business District (CBD), (2) Pennsylvania Suburbs, (3) Metropolitan Washington, D.C., (4) Austin, Texas and (5) Other. The Philadelphia CBD segment includes properties located in the City of Philadelphia in Pennsylvania. The Pennsylvania Suburbs segment includes properties in Chester, Delaware, and Montgomery counties in the Philadelphia suburbs. 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 Other segment includes properties located in New Jersey/Delaware. On February 2, 2017, the Company sold its last two remaining properties located in California, which were previously included in the Other segment. See Note 3, “Real Estate Investments,” for further information. 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, 2017		December 31, 2016
Philadelphia CBD	$	1,471,258	$	1,320,974
Pennsylvania Suburbs		1,006,780		1,005,446
Metropolitan Washington, D.C.		974,838		975,987
Austin, Texas		146,858		146,794
Other		102,470		137,094
	$	3,702,204	$	3,586,295
Assets held for sale (a)		5,576		73,591
Operating Properties	$	3,707,780	$	3,659,886
Corporate
Construction-in-progress	$	166,372	$	297,462
Land held for development	$	153,268	$	150,970

(a)  As of March 31, 2017, the Company categorized a retail property located in the Other segment as held for sale in accordance with applicable accounting standards for long lived assets. See Note 3, “Real Estate Investments,” for further information.

None of the above aforementioned sales or properties classified as held for sale are considered significant dispositions under the accounting guidance for discontinued operations.

Net operating income (in thousands):

	Three-month periods ended
	March 31,
	2017							2016
	Total revenue		Operating expenses (a)			Net operating income		Total revenue		Operating expenses (a)			Net operating income
Philadelphia CBD	$	54,449	$	(20,837	)	$	33,612	$	49,670	$	(19,256	)	$	30,414
Pennsylvania Suburbs		35,655		(12,584	)		23,071		37,106		(13,155	)		23,951
Metropolitan Washington, D.C.		23,362		(9,383	)		13,979		27,339		(10,899	)		16,440
Austin, Texas		9,123		(3,573	)		5,550		8,547		(3,255	)		5,292
Other		6,362		(3,856	)		2,506		12,740		(7,602	)		5,138
Corporate		1,969		(848	)		1,121		1,100		(608	)		492
Operating Properties	$	130,920	$	(51,081	)	$	79,839	$	136,502	$	(54,775	)	$	81,727

(a) Includes property operating expense, real estate taxes and third party management expense.

Unconsolidated real estate ventures (in thousands):
	Investment in real estate ventures, at equity				Equity in loss of real estate ventures
	As of				Three-month periods ended March 31,
	March 31, 2017		December 31, 2016		2017			2016
Philadelphia CBD	$	44,618	$	48,691	$	(67	)	$	455
Pennsylvania Suburbs		3,147		15,421		276			265
Metropolitan Washington, D.C.		143,591		141,786		467			(448	)
MAP Venture (a)		17,776		20,893		(1,117	)		(556	)
Other		1,713		1,654		58			161
Austin, Texas		54,096		52,886		(365	)		(280	)
Total	$	264,941	$	281,331	$	(748	)	$	(403	)

(a) 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. The MAP Venture’s business operations, including properties in Richmond, Virginia; Metropolitan Washington, D.C.; 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.

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. Property operating expenses that are included in determining NOI consist of costs that are necessary and allocable to our operating properties such as utilities, property-level salaries, repairs and maintenance, property insurance, management fees and bad debt expense. General and administrative expenses that are not reflected in NOI primarily consist of corporate-level salaries, amortization of share awards and professional fees that are incurred as part of corporate office management. 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 believes NOI provides useful information to investors regarding the financial condition and results of operations because it reflects only those income and expense items that are incurred at the property level. While NOI is a relevant and widely used measure of operating performance of real estate investment trusts, it does not represent cash flow from operations or net income as defined by GAAP and should not be considered as an alternative to those measures in evaluating our liquidity or operating performance. NOI does not reflect interest expenses, real estate impairment losses, depreciation and amortization costs, capital expenditures and leasing costs. The Company believes that net income, 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-month periods ended March 31,
	2017			2016
Consolidated net operating income	$	79,839		$	81,727
Less:
Interest expense		(21,437	)		(23,691	)
Interest expense - amortization of deferred financing costs		(634	)		(774	)
Interest expense - financing obligation		-			(281	)
Depreciation and amortization		(45,892	)		(48,873	)
General and administrative expenses		(9,425	)		(9,120	)
Equity in loss of Real Estate Ventures		(748	)		(403	)
Provision for impairment		(2,730	)		(7,390	)
Loss on early extinguishment of debt		-			(66,590	)
Plus:
Interest income		393			320
Net gain on disposition of real estate		7,323			115,456
Net gain on Real Estate Venture transactions		14,582			5,929
Net income	$	21,271		$	46,310

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2017

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 may be required to fund required leasing and capital reserve accounts for the benefit of the mortgage lenders with a letter-of-credit.  As of March 31, 2017, there is an associated $10.0 million letter of credit for a mortgage lender. 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 4 to 72 years. Minimum future rental payments on non-cancelable leases at March 31, 2017 are as follows (in thousands):

Year	Minimum Rent
2017 (nine months remaining)	$	904
2018		1,205
2019		1,205
2020		1,205
2021		1,205
Thereafter		57,208
Total	$	62,932

The Company obtained ground tenancy rights related to three 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, 2016 for further detail regarding commitments and contingencies.

Put Agreement

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, 2017, the liability had accreted to $1.8 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, 2017, the Company’s unconsolidated real estate ventures had aggregate indebtedness to third parties of $953.8 million. These loans are generally mortgage or construction loans, most of which are non-recourse to the Company.  In addition, in certain instances, the Company provides non-recourse carve-out guarantees on these non-recourse loans. As of March 31, 2017, the loans for which there is recourse to the Company consists of the following: (i) a $55.4 million payment guaranty on the term loan for evo at Cira; (ii) a several cost overrun guaranty on the $88.9 million construction loan for the development project being undertaken by 1919 Market Street LP; and (ii) a $0.4 million payment guarantee on a loan provided to PJP VII. See Note 4, "Investment in Unconsolidated Real Estate Ventures," in the notes to the consolidated financial statements above for more information.

Other Commitments or Contingencies

On July 1, 2016, the Company closed on the acquisition of 34.6 acres of land located in Austin, Texas known as the Garza Ranch. As of March 31, 2017, Company is under agreement to sell 8.4 acres and has sold 1.7 acres (of the 34.6 acres) to two unaffiliated third parties. In connection with the agreements of sale, the Company entered into a development agreement and related completion guarantee to construct certain infrastructure improvements to the land on behalf of each buyer, estimated to cost $13.6 million. Total estimated costs related to the improvements are included in the sale price of each land parcel. Recognition of the sale of the land parcels is deferred until the improvements are completed.

On December 3, 2015, the Company entered into an agreement as development manager to construct Subaru of America’s (“Subaru”) corporate headquarters in Camden, New Jersey. The agreement provides the Company with the ability to earn additional profit if total project costs are less than the not-to-exceed (“NTE”) amount.  The NTE amount, currently at $78.1 million, may be adjusted by change orders agreed upon by both Subaru and the Company.  If construction costs are in excess of the NTE amount, the Company is obligated to pay such cost overruns. The terms of the guarantee do not provide a limitation on the costs the Company may be responsible for. As of March 31, 2017, the Company does not expect to incur costs in excess of the NTE amount.

Also on December 3, 2015, the Company entered into an agreement to construct an 83,000 square foot build-to-suit service center (the “Subaru NSTC Development”) on land parcels owned by the Company for Subaru as the single tenant. On such date, Subaru entered into an 18-year lease for the service center. The lease contains a purchase option, which allows Subaru to purchase the property at commencement of the lease, or five years subsequent to inception, at depreciated cost. The Company currently expects to deliver the building during the second quarter of 2018.  At March 31, 2017, $10.8 million of the project costs, totaling $44.3 million, had been funded.

The Company invests in its properties and regularly incurs capital expenditures in the ordinary course of business to maintain the properties. The Company believes that such expenditures enhance its competitiveness. The Company also enters into construction, utility and service contracts in the ordinary course of business which may extend beyond one year. These contracts typically provide for cancellation with insignificant or no cancellation penalties.

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Subsequent Events

3 Months Ended

Mar. 31, 2017

Subsequent Events [Abstract]

SUBSEQUENT EVENTS

15. SUBSEQUENT EVENTS

Preferred Share Redemption

On April 11, 2017 (the “Redemption Date”), the Parent Company completed the previously announced redemption of all of its outstanding 4,000,000 Series E Preferred Shares at a redemption price of $25.00 per share (the “Redemption Price”). On April 17, 2017 (the “Distribution Payment Date”), the Parent Company paid each holder of record of Series E Preferred Shares on March 30, 2017 all accrued and unpaid distributions on the Series E Preferred Shares up to, but not including the Distribution Payment Date, which represents an amount equal to $0.50792 per share (the “Distribution”). From and after the Distribution Payment Date, distributions ceased to accrue, and on and after the Distribution Payment Date, the only remaining right of holders of the Series E Preferred Shares is the right to receive payment of the Redemption Price and Distribution. Following the redemption, the Series E Preferred Shares were delisted from the New York Stock Exchange. The Redemption Price together with the Distribution amounting to $102.0 million was paid by the Parent Company to the Depository Trust Company on April 11, 2017 from available cash balances on hand. On the Redemption Date, the Company recognized a preferred share redemption charge of $3.2 million related to the original issuance costs.

In connection with this redemption, the Operating Partnership redeemed all of its 4,000,000 outstanding Series E-Linked Preferred Mirror Units.

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Basis of Presentation (Policies)

3 Months Ended

Mar. 31, 2017

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The consolidated financial statements have been prepared by the Company pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) for interim financial statements. Certain information and footnote disclosures normally included in the annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP") have been condensed or omitted pursuant to such rules and regulations. In the opinion of management, all adjustments (consisting solely of normal recurring matters) for a fair statement of the financial position of the Company as of March 31, 2017, the results of its operations for the three-month periods ended March 31, 2017 and 2016 and its cash flows for the three-month periods ended March 31, 2017 and 2016 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 2016 Annual Report on Form 10-K filed with the SEC on March 1, 2017.

The Company's Annual Report on Form 10-K for the year ended December 31, 2016 contains a discussion of our significant accounting policies under Note 2, "Summary of Significant Accounting Policies". There have been no significant changes in our significant accounting policies since December 31, 2016. Management discusses our significant accounting policies and management’s judgments and estimates with the Company's Audit Committee.

Reclassifications

Reclassifications

During the first quarter of 2017, the Company adopted ASU 2016-09, Improvements to Employee Share-Based Payment Accounting (“ASU 2016-09”), which requires the Company to reclassify employer tax payments on account of employee tax withholdings on share-based awards from operating activities to financing activities.  Prior to the issuance of ASU 2016-09, there was no guidance on the classification of cash paid by an employer to the taxing authorities when directly withholding shares for tax withholding purposes. As a result of the adoption, a $0.3 million cash outflow has been reclassified in the March 31, 2016 consolidated statements of cash flows from operating activities to financing activities. There was no other impact from the adoption of this guidance.  

During the quarter ended December 31, 2016, the Company early adopted ASU 2016-15, “Classification of Certain Cash Receipts and Cash Payments” (“ASU 2016-15”), which clarifies that debt prepayment costs should be presented as financing activities in the statement of cash flows. As a result of the adoption, $53.4 million was reclassified in the consolidated statements of cash flows from the operating activities section to the financing activities section of the consolidated statements of cash flows, within the “Repayment of mortgage notes payable” caption, for the three-months period ended March 31, 2016. There was no other impact from the adoption of this guidance.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

On February 22, 2017, the FASB issued ASU No. 2017-05 (“ASU 2017-05) to provide guidance for recognizing gains and losses from the transfer of nonfinancial assets and in-substance non-financial assets in contracts with non-customers, unless other specific guidance applies. The standard requires a company to derecognize nonfinancial assets once it transfers control of a distinct nonfinancial asset or distinct in substance nonfinancial asset. Additionally, when a company transfers its controlling interest in a nonfinancial asset, but retains a noncontrolling ownership interest, the company is required to measure any non-controlling interest it receives or retains at fair value. The guidance requires companies to recognize a full gain or loss on the transaction. As a result of the new guidance, the guidance specific to real estate sales in ASC 360-20 will be eliminated. As such, sales and partial sales of real estate assets will now be subject to the same derecognition model as all other nonfinancial assets. The guidance is effective for annual periods beginning after December 15, 2017, including interim periods within that reporting period. The effective date of this guidance coincides with revenue recognition guidance. The Company is in the process of evaluating the impact of this new guidance and on its consolidated financial statements. The Company expects to utilize the modified retrospective approach.

On January 5, 2017, the FASB issued ASU No. 2017-01 (“ASU 2017-01”) to amend the guidance for determining whether a transaction involves the purchase or disposal of a business or an asset. The amendments clarify that when substantially all of the fair value of the gross assets acquired or disposed of is concentrated in a single identifiable asset or a group of similar assets, the set of assets and activities is not a business. ASU 2017-01 is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years and early adoption is permitted for transactions which have not been previously reported in financial statements that have been issued. The Company adopted the guidance on the issuance date effective January 2017. The Company expects that most of its real estate acquisitions will be considered asset acquisitions under the new guidance and that transaction costs will be capitalized to the investment basis which is then subject to a purchase price allocation based on relative fair value.

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Real Estate Investments (Tables)

3 Months Ended

Mar. 31, 2017

Real Estate Properties [Line Items]

Gross Carrying Value Of Company's Properties

As of March 31, 2017 and December 31, 2016, the gross carrying value of the Properties was as follows (in thousands):

	March 31,		December 31,
	2017		2016
Land	$	462,014	$	469,522
Building and improvements		2,801,495		2,683,087
Tenant improvements		438,695		433,686
Operating properties		3,702,204		3,586,295
Assets held for sale - real estate investments (a)		5,576		73,591
Total	$	3,707,780	$	3,659,886

(a) Real estate investments related to assets held for sale above represents gross real estate assets and does not include accumulated depreciation or other assets on the balance sheet of the property held for sale. See “Held for Sale” below in this Note 3.

Dispositions

The Company sold the following eight office properties and one mixed-use property during the three-month period ended March 31, 2017 (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)
March 30, 2017	200, 210 & 220 Lake Drive East (Woodland Falls)	Cherry Hill, NJ	3		215,465	$	19,000	$	17,771	$	(249	)	(b)
March 15, 2017	Philadelphia Marine Center (Marine Piers)	Philadelphia, PA	1		181,900		21,400		11,182		6,498		(c)
March 13, 2017	11700, 11710, 11720 & 11740 Beltsville Drive (Calverton)	Beltsville, MD	3		313,810		9,000		8,354		-		(d)
February 2, 2017	1200 & 1220 Concord Avenue (Concord Airport Plaza)	Concord, CA	2		350,256		33,100		32,010		551		(e)
Total Dispositions			9		1,061,431	$	82,500	$	69,317	$	6,800

(a) Gain/(Loss) on Sale is net of closing and other transaction related costs.

(b) During the fourth quarter of 2016, the Company recognized a $7.3 million impairment related to these properties.

(c) On March 15, 2017, the Company sold its sublease interest in the Piers at Penn’s Landing (the “Marine Piers”), which includes leasehold improvements containing 181,900 net rentable square feet, and a marina, located in Philadelphia, Pennsylvania for a sales price of $21.4 million, which will be paid in two installments. On the closing date, the buyer paid $12.0 million in cash. On the second purchase price installment date, the buyer will pay $9.4 million. The second purchase price installment is due on (a) January 31, 2020, in the event that the tenant at the Marine Piers does not exercise its existing option to extend the term of the sublease or (b) January 15, 2024, in the event that the tenant does exercise its current extension option to extend the term of the sublease. In accordance with ASC 360-20, Real Estate Sales, the Company determined that it is appropriate to account for the sales transaction under the cost recovery method. The Company received cash proceeds of $11.2 million, after closing costs and prorations, and the net book value of the Marine Piers was $4.7 million, resulting in a gain on sale of $6.5 million. The remaining gain on sale of $9.4 million will be recognized on the second purchase price installment date. The Marine Piers was classified as mixed-use within our property count.

(d) During the fourth quarter of 2016, the Company recognized a $3.0 million impairment related to these properties. During the first quarter of 2017, there was a price reduction of $1.7 million under the agreement of sale and an additional impairment of $1.7 million was recognized.

(e) This sale is designated as a like-kind exchange under Section 1031 of the Internal Revenue Code (“IRC”) and, as such, the proceeds, totaling $32.0 million after closing costs and prorations, were deposited with a Qualified Intermediary, as defined under the IRC. The proceeds received at closing were recorded as “Other assets” in the Company’s consolidated balance sheet as of March 31, 2017. During the fourth quarter of 2016, the Company recognized a $11.5 million impairment related to these properties.

The Company sold the following land parcels during the three-month period ended March 31, 2017 (dollars in thousands):

Disposition Date	Property/Portfolio Name	Location	Number of Parcels		Acres		Sales Price		Net Proceeds on Sale		Gain on Sale
February 15, 2017	Gateway Land C	Richmond, VA		1		4.8	$	1,100	$	1,043	$	-	(a)
January 30, 2017	Garza Ranch	Austin, TX		1		1.7		3,500		3,277		-	(b)
Total Dispositions				2		6.5	$	4,600	$	4,320	$	-

(a) During the fourth quarter of 2016, the Company recognized a nominal impairment related to this land parcel.

(b) The Company has a continuing involvement through a completion guaranty, which requires the Company as developer to complete certain infrastructure improvements on behalf of the buyers of the land parcels. The cash received at settlement was recorded as “Deferred income, gains and rent” on the Company’s consolidated balance sheet and the Company will recognize the sale once the infrastructure improvements are complete. See Item 2., “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Contractual Obligations” for further discussion of the infrastructure improvements.

Held for Sale Properties Included in Continuing Operations [Member]

Real Estate Properties [Line Items]

Summary of Properties Classified as Held for Sale but Which did not Meet the Criteria to be Classified within Discontinued Operations

The following is a summary of one property classified as held for sale but which did not meet the criteria to be classified within discontinued operations at March 31, 2017 (in thousands):

	Held for Sale Property Included in Continuing Operations
	March 31, 2017
	Other Segment - Retail
ASSETS HELD FOR SALE
Real estate investments:
Operating properties	$	5,576
Accumulated depreciation		(79	)
Operating real estate investments, net		5,497
Land held for development		-
Total real estate investments, net		5,497
Other assets		765
Total assets held for sale, net	$	6,262
LIABILITIES HELD FOR SALE
Other liabilities	$	387
Total liabilities held for sale	$	387

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Investment in Unconsolidated Real Estate Ventures (Tables)

3 Months Ended

Mar. 31, 2017

Equity Method Investments And Joint Ventures [Abstract]

Investment in Real Estate Ventures and Share of Real Estate Ventures' Income (Loss)

The following is a summary of the financial position of the Real Estate Ventures in which the Company held interests as of March 31, 2017 and December 31, 2016 (in thousands):

	March 31, 2017		December 31, 2016
Net property	$	1,405,986	$	1,483,067
Other assets		210,032		231,972
Other liabilities		107,161		129,486
Debt, net		946,891		989,738
Equity		561,966		595,815
Company’s share of equity (Company’s basis) (a)	$	264,941	$	281,331

(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.

The following is a summary of results of operations of the Real Estate Ventures in which the Company held interests during the three-month periods ended March 31, 2017 and 2016 (in thousands):

	Three-month periods ended March 31,
	2017			2016
Revenue	$	54,279		$	46,525
Operating expenses		(25,166	)		(26,668	)
Interest expense, net		(10,830	)		(8,989	)
Depreciation and amortization		(20,761	)		(20,160	)
Net loss (a)	$	(2,478	)	$	(9,292	)
Equity in loss of Real Estate Ventures	$	(748	)	$	(403	)

(a) The three-month period ended March 31, 2016 amount includes $6.4 million of acquisition deal costs related to the formation of the MAP Venture during the three-month period ended March 31, 2016.

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Intangible Assets and Liabilities (Tables)

3 Months Ended

Mar. 31, 2017

Goodwill And Intangible Assets Disclosure [Abstract]

Summary of Intangible Assets and Liabilities

As of March 31, 2017 and December 31, 2016, the Company’s intangible assets/liabilities were comprised of the following (in thousands):

	March 31, 2017
	Total Cost		Accumulated Amortization			Intangible Assets, net
Intangible assets, net:
In-place lease value	$	114,196	$	(54,834	)	$	59,362
Tenant relationship value		13,036		(10,378	)		2,658
Above market leases acquired		4,703		(2,501	)		2,202
Total intangible assets, net	$	131,935	$	(67,713	)	$	64,222
Acquired lease intangibles, net:
Below market leases acquired	$	30,683	$	(14,079	)	$	16,604

	December 31, 2016
	Total Cost		Accumulated Amortization			Intangible Assets, net
Intangible assets, net:
In-place lease value	$	142,889	$	(75,696	)	$	67,193
Tenant relationship value		13,074		(10,167	)		2,907
Above market leases acquired		4,718		(2,340	)		2,378
Total intangible assets, net	$	160,681	$	(88,203	)	$	72,478
Acquired lease intangibles, net:
Below market leases acquired	$	37,579	$	(19,460	)	$	18,119

Summary of Amortization for Intangible Assets and Liabilities

As of March 31, 2017, the Company’s annual amortization for its intangible assets/liabilities, assuming no prospective early lease terminations, are as follows (dollars in thousands):

	Assets		Liabilities
2017 (nine months remaining)	$	11,409	$	1,809
2018		11,754		2,196
2019		10,536		1,885
2020		8,457		1,337
2021		5,971		807
Thereafter		16,095		8,570
Total	$	64,222	$	16,604

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Debt Obligations (Tables)

3 Months Ended

Mar. 31, 2017

Debt Disclosure [Abstract]

Consolidated debt obligations

The following table sets forth information regarding the Company’s consolidated debt obligations outstanding at March 31, 2017 and December 31, 2016 (in thousands):

	March 31, 2017			December 31, 2016			Effective Interest Rate				Maturity Date
MORTGAGE DEBT:
Two Logan Square	$	85,625		$	86,012			3.98	%		May 2020
One Commerce Square		126,198			127,026			3.64	%	(a)	Apr 2023
Two Commerce Square		112,000			112,000			4.51	%	(b)	Apr 2023
Principal balance outstanding		323,823			325,038
Plus: fair market value premium (discount), net		(2,652	)		(2,761	)
Less: deferred financing costs		(687	)		(728	)
Mortgage indebtedness	$	320,484		$	321,549
UNSECURED DEBT
Seven-Year Term Loan - Swapped to fixed	$	250,000		$	250,000			3.72	%		Oct 2022
$300.0M 5.70% Guaranteed Notes due 2017		300,000			300,000			5.68	%		May 2017
$325.0M 4.95% Guaranteed Notes due 2018		325,000			325,000			5.13	%		Apr 2018
$250.0M 3.95% Guaranteed Notes due 2023		250,000			250,000			4.02	%		Feb 2023
$250.0M 4.10% Guaranteed Notes due 2024		250,000			250,000			4.33	%		Oct 2024
$250.0M 4.55% Guaranteed Notes due 2029		250,000			250,000			4.60	%		Oct 2029
Indenture IA (Preferred Trust I)		27,062			27,062			2.75	%		Mar 2035
Indenture IB (Preferred Trust I)		25,774			25,774			3.30	%		Apr 2035
Indenture II (Preferred Trust II)		25,774			25,774			3.09	%		Jul 2035
Principal balance outstanding		1,703,610			1,703,610
Plus: original issue premium (discount), net		(4,424	)		(4,678	)
Less: deferred financing costs		(6,999	)		(7,369	)
Total unsecured indebtedness	$	1,692,187		$	1,691,563
Total Debt Obligations	$	2,012,671		$	2,013,112

(a) This loan was assumed upon acquisition of the related properties on December 19, 2013. On December 29, 2015, the Company refinanced the debt increasing the principal balance to $130.0 million and extended the term of the scheduled maturity from January 6, 2016 to April 5, 2023.  The effective interest rate as of December 31, 2015 was 3.64%.  A default under this loan will also constitute a default under the loan outstanding on Two Commerce Square. This loan is also secured by a lien on Two Commerce Square.

(b) This loan was assumed upon acquisition of the related property on December 19, 2013. The interest rate reflects the market rate at the time of acquisition. A default under this loan will also constitute a default under the loan outstanding on One Commerce Square. This loan is also secured by a lien on One Commerce Square.

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Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2017

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, 2017				December 31, 2016
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Unsecured notes payable	$	1,365,398	$	1,381,975	$	1,364,854	$	1,372,758
Variable rate debt	$	326,789	$	307,917	$	326,709	$	307,510
Mortgage notes payable	$	320,484	$	327,144	$	321,549	$	328,853
Note receivable (a)	$	3,401	$	3,918	$	3,380	$	3,717

1. The inputs to originate the loan are unobservable and, as a result, are categorized as Level 3. The Company determined fair value by calculating the present value of the cash payments to be received through the maturity date of the loan. See Note 2, “Summary of Significant Accounting Policies,” to the Company’s 2016 Annual Report on Form 10-K for the year ended December 31, 2016 for further information regarding the note origination.

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Fair Value of Derivative Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2017

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, 2017 and December 31, 2016. 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 assets and other liabilities on the Company’s consolidated balance sheets).

Hedge Product	Hedge Type	Designation		Notional Amount				Strike			Trade Date	Maturity Date	Fair value
				3/31/2017		12/31/2016							3/31/2017			12/31/2016
Assets
Swap	Interest Rate	Cash Flow	(a)	$	250,000	$	250,000		3.718	%	October 8, 2015	October 8, 2022	$	4,572		$	3,733
Liabilities
Swap	Interest Rate	Cash Flow	(a)		25,774		25,774		3.300	%	December 22, 2011	January 30, 2021		(169	)		(300	)
Swap	Interest Rate	Cash Flow	(a)		25,774		25,774		3.090	%	January 6, 2012	October 30, 2019		(93	)		(214	)
Swap	Interest Rate	Cash Flow	(a)		27,062		27,062		2.750	%	December 21, 2011	September 30, 2017		(37	)		(83	)
				$	328,610	$	328,610

(a) Hedging unsecured variable rate debt.  

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Beneficiaries Equity of the Parent Company (Tables)

3 Months Ended

Mar. 31, 2017

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-month periods ended March 31,
	2017						2016
	Basic			Diluted			Basic			Diluted
Numerator
Income from continuing operations	$	21,271		$	21,271		$	46,310		$	46,310
Net income from continuing operations attributable to non-controlling interests		(169	)		(169	)		(389	)		(389	)
Nonforfeitable dividends allocated to unvested restricted shareholders		(99	)		(99	)		(105	)		(105	)
Preferred share dividends		(1,725	)		(1,725	)		(1,725	)		(1,725	)
Net income attributable to common shareholders	$	19,278		$	19,278		$	44,091		$	44,091
Denominator
Weighted-average shares outstanding		175,176,964			175,176,964			174,788,945			174,788,945
Contingent securities/Share based compensation		-			1,024,908			-			682,468
Weighted-average shares outstanding		175,176,964			176,201,872			174,788,945			175,471,413
Earnings per Common Share:
Net income attributable to common shareholders	$	0.11		$	0.11		$	0.25		$	0.25

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Partners Equity of the Operating Partnership (Tables)

3 Months Ended

Mar. 31, 2017

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-month periods ended March 31,
	2017						2016
	Basic			Diluted			Basic			Diluted
Numerator
Income from continuing operations	$	21,271		$	21,271		$	46,310		$	46,310
Net income from continuing operations attributable to non-controlling interests		(169	)		(169	)		(389	)		(389	)
Nonforfeitable dividends allocated to unvested restricted shareholders		(99	)		(99	)		(105	)		(105	)
Preferred share dividends		(1,725	)		(1,725	)		(1,725	)		(1,725	)
Net income attributable to common shareholders	$	19,278		$	19,278		$	44,091		$	44,091
Denominator
Weighted-average shares outstanding		175,176,964			175,176,964			174,788,945			174,788,945
Contingent securities/Share based compensation		-			1,024,908			-			682,468
Weighted-average shares outstanding		175,176,964			176,201,872			174,788,945			175,471,413
Earnings per Common Share:
Net income attributable to common shareholders	$	0.11		$	0.11		$	0.25		$	0.25

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-month periods ended March 31,
	2017						2016
	Basic			Diluted			Basic			Diluted
Numerator
Income from continuing operations	$	21,271		$	21,271		$	46,310		$	46,310
Nonforfeitable dividends allocated to unvested restricted unitholders		(99	)		(99	)		(105	)		(105	)
Preferred unit dividends		(1,725	)		(1,725	)		(1,725	)		(1,725	)
Net income attributable to non-controlling interests		(5	)		(5	)		(2	)		(2	)
Net income attributable to common unitholders	$	19,442		$	19,442		$	44,478		$	44,478
Denominator
Weighted-average units outstanding		176,656,763			176,656,763			176,324,047			176,324,047
Contingent securities/Share based compensation		-			1,024,908			-			682,468
Total weighted-average units outstanding		176,656,763			177,681,671			176,324,047			177,006,515
Earnings per Common Partnership Unit:
Net income attributable to common unitholders	$	0.11		$	0.11		$	0.25		$	0.25

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Share Based Compensation, 401(k) Plan and Deferred Compensation (Tables)

3 Months Ended

Mar. 31, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Company's Restricted Share Activity

The following table summarizes the Company’s restricted share activity during the three months ended March 31, 2017:

	Shares			Weighted Average Grant Date Fair Value		Aggregate Intrinsic Value
Non-vested at January 1, 2017		488,604		$	14.10	$	8,066,852
Granted		141,751			16.68		2,364,127
Vested		(9,394	)		14.90		153,216
Forfeited		(2,000	)		13.58
Non-vested at March 31, 2017		618,961		$	14.68	$	10,045,737

Schedule of Restricted Performance Share Units Plan

The table below presents certain information as to unvested RPSU awards.

	RPSU Grant
	2/23/2015		2/22/2016		3/1/2017		Total
(Amounts below in shares, unless otherwise noted)
Non-vested at January 1, 2017		147,589		231,388		-		378,977
Units Granted		-		-		174,854		174,854
Units Cancelled		-		-		-		-
Non-vested at March 31, 2017		147,589		231,388		174,854		553,831
Measurement Period Commencement Date	1/1/2015		1/1/2016		1/1/2017
Measurement Period End Date	12/31/2017		12/31/2018		12/31/2019
Units Granted		186,395		231,388		174,854
Fair Value of Units on Grant Date (in thousands)	$	3,933	$	3,558	$	3,735

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Segment Information (Tables)

3 Months Ended

Mar. 31, 2017

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, 2017		December 31, 2016
Philadelphia CBD	$	1,471,258	$	1,320,974
Pennsylvania Suburbs		1,006,780		1,005,446
Metropolitan Washington, D.C.		974,838		975,987
Austin, Texas		146,858		146,794
Other		102,470		137,094
	$	3,702,204	$	3,586,295
Assets held for sale (a)		5,576		73,591
Operating Properties	$	3,707,780	$	3,659,886
Corporate
Construction-in-progress	$	166,372	$	297,462
Land held for development	$	153,268	$	150,970

(a)  As of March 31, 2017, the Company categorized a retail property located in the Other segment as held for sale in accordance with applicable accounting standards for long lived assets. See Note 3, “Real Estate Investments,” for further information.

None of the above aforementioned sales or properties classified as held for sale are considered significant dispositions under the accounting guidance for discontinued operations.

Net operating income (in thousands):

	Three-month periods ended
	March 31,
	2017							2016
	Total revenue		Operating expenses (a)			Net operating income		Total revenue		Operating expenses (a)			Net operating income
Philadelphia CBD	$	54,449	$	(20,837	)	$	33,612	$	49,670	$	(19,256	)	$	30,414
Pennsylvania Suburbs		35,655		(12,584	)		23,071		37,106		(13,155	)		23,951
Metropolitan Washington, D.C.		23,362		(9,383	)		13,979		27,339		(10,899	)		16,440
Austin, Texas		9,123		(3,573	)		5,550		8,547		(3,255	)		5,292
Other		6,362		(3,856	)		2,506		12,740		(7,602	)		5,138
Corporate		1,969		(848	)		1,121		1,100		(608	)		492
Operating Properties	$	130,920	$	(51,081	)	$	79,839	$	136,502	$	(54,775	)	$	81,727

(a) Includes property operating expense, real estate taxes and third party management expense.

Unconsolidated real estate ventures (in thousands):
	Investment in real estate ventures, at equity				Equity in loss of real estate ventures
	As of				Three-month periods ended March 31,
	March 31, 2017		December 31, 2016		2017			2016
Philadelphia CBD	$	44,618	$	48,691	$	(67	)	$	455
Pennsylvania Suburbs		3,147		15,421		276			265
Metropolitan Washington, D.C.		143,591		141,786		467			(448	)
MAP Venture (a)		17,776		20,893		(1,117	)		(556	)
Other		1,713		1,654		58			161
Austin, Texas		54,096		52,886		(365	)		(280	)
Total	$	264,941	$	281,331	$	(748	)	$	(403	)

(a) 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. The MAP Venture’s business operations, including properties in Richmond, Virginia; Metropolitan Washington, D.C.; 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.

Reconciliation of Consolidated NOI to Consolidated Net Income (Loss)

The following is a reconciliation of consolidated NOI to consolidated net income, as defined by GAAP (in thousands):

	Three-month periods ended March 31,
	2017			2016
Consolidated net operating income	$	79,839		$	81,727
Less:
Interest expense		(21,437	)		(23,691	)
Interest expense - amortization of deferred financing costs		(634	)		(774	)
Interest expense - financing obligation		-			(281	)
Depreciation and amortization		(45,892	)		(48,873	)
General and administrative expenses		(9,425	)		(9,120	)
Equity in loss of Real Estate Ventures		(748	)		(403	)
Provision for impairment		(2,730	)		(7,390	)
Loss on early extinguishment of debt		-			(66,590	)
Plus:
Interest income		393			320
Net gain on disposition of real estate		7,323			115,456
Net gain on Real Estate Venture transactions		14,582			5,929
Net income	$	21,271		$	46,310

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Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2017

Commitments And Contingencies Disclosure [Abstract]

Minimum Future Rental Payments on Non-cancelable Leases

Minimum future rental payments on non-cancelable leases at March 31, 2017 are as follows (in thousands):

Year	Minimum Rent
2017 (nine months remaining)	$	904
2018		1,205
2019		1,205
2020		1,205
2021		1,205
Thereafter		57,208
Total	$	62,932

XML

Organization of The Parent Company and The Operating Partnership (Textual) (Details) - Mar. 31, 2017 ft² in Millions	Total	property	ft²	Real_Estate_Investment	a	Apartment_unit
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of Properties		104
Office Properties [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of Properties		90
Mixed Use Properties [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of Properties		6
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		97
Development Property [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of Properties		3
Redevelopment Properties [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of Properties		3
Assets Held-for-sale [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of Properties		1
Unconsolidated 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_Investment				13
Unconsolidated Real Estate Ventures [Member] | Seven 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_Investment				7
Rentable Square Feet | ft²			8.0
Unconsolidated Real Estate Ventures [Member] | Two Real Estate Ventures [Member] | Undeveloped Land [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of Unconsolidated Investments in Real Estate Ventures | Real_Estate_Investment				2
Acreage of land | a					4.3
Unconsolidated Real Estate Ventures [Member] | Two Other Real Estate Ventures [Member] | Under Active Development Land [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of Unconsolidated Investments in Real Estate Ventures | Real_Estate_Investment				2
Acreage of land | a					1.4
Unconsolidated Real Estate Ventures [Member] | Two Other Real Estate Ventures [Member] | Residential Tower One [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of Unconsolidated Investments in Real Estate Ventures | Real_Estate_Investment				1
Number of Property units		345				345
Unconsolidated Real Estate Ventures [Member] | Two Other Real Estate Ventures [Member] | Residential Tower Two [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of Unconsolidated Investments in Real Estate Ventures | Real_Estate_Investment				1
Number of Property units		321				321
Parent Company [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Ownership in the Operating Partnership	99.20%
Net Rentable Square Feet | ft²			16.5
Area Owned by Company of Undeveloped Parcels of Land | a					312
Area of Additional Undeveloped Parcels of Land With Option to Purchase | a					60
Total Potential Development Capacity | ft²			12.2
Wholly-owned Management Company Subsidiaries [Member]
Organization of The Parent Company and The Operating Partnership [Line Items]
Net Rentable Square Feet | ft²			26.7
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			10.2
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			16.5
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			10.2

XML

Basis of Presentation (Textual) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Basis Of Presentation [Line Items]
Shares used for employee taxes upon vesting of share awards	$ 129	$ 289
ASU 2016-09 [Member] | Reclassified from Operating Activities to Financing Activities [Member]
Basis Of Presentation [Line Items]
Shares used for employee taxes upon vesting of share awards		300
ASU 2016-15 [Member] | Reclassified from Operating Activities to Financing Activities [Member]
Basis Of Presentation [Line Items]
Debt prepayment costs		$ 53,400

XML

Real Estate Investments - Gross Carrying Value of Properties (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment, Gross [Abstract]
Land		$ 462,014	$ 469,522
Tenant improvements		438,695	433,686
Operating properties		3,702,204	3,586,295
Assets held for sale - real estate investments	[1],[2]	5,576	73,591
Total		3,707,780	3,659,886
Building and Improvements [Member]
Property, Plant and Equipment, Gross [Abstract]
Operating properties		$ 2,801,495	$ 2,683,087

[1] As of March 31, 2017, the Company categorized a retail property located in the Other segment as held for sale in accordance with applicable accounting standards for long lived assets. See Note 3, “Real Estate Investments,” for further information.

[2] Real estate investments related to assets held for sale above represents gross real estate assets and does not include accumulated depreciation or other assets on the balance sheet of the property held for sale. See “Held for Sale” below in this Note 3.

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Real Estate Investments - Dispositions (Textual) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) property segment	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Net gain on disposition of real estate	$ 7,323	$ 115,456
Number of Properties | property	104
Aggregate carrying values of properties	$ 3,702,204		$ 3,586,295
Other Segment [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of Properties | segment	4
Impairment of properties held for use	$ 1,000
Carrying value of real estate prior to impairment	$ 10,200
Impairment Hold Period	10 years
Residual Capitalization Rates	9.00%
Discount Rates	9.25%
Impairment on Held for Use Properties [Member] | Other Segment [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Aggregate carrying values of properties	$ 9,200
2970 Market Street (Cira Square) [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Net gain on disposition of real estate	$ 500
Office Properties [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of Properties Sold | property	8
Number of Properties | property	90
Mixed-use Property [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of Properties Sold | property	1

XML

Real Estate Investments - Summary of Office Properties Sold (Details) $ in Thousands		3 Months Ended
		Mar. 31, 2017 USD ($) ft² property	Mar. 31, 2016 USD ($)
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Net Proceeds on Sale		$ 74,159	$ 704,911
Gain (Loss) on Sale		$ 7,323	$ 115,456
Philadelphia Marine Center (Marine Piers) [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Rentable Square Feet | ft²		181,900
Sales Price		$ 21,400
Net Proceeds on Sale		11,200
Gain (Loss) on Sale		$ 6,500
Office Building and Mixed-use Property [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of Properties Sold | property		9
Rentable Square Feet | ft²		1,061,431
Sales Price		$ 82,500
Net Proceeds on Sale		69,317
Gain (Loss) on Sale	[1]	$ 6,800
Office Building and Mixed-use Property [Member] | 200, 210 & 220 Lake Drive East (Woodland Falls) [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of Properties Sold | property		3
Rentable Square Feet | ft²		215,465
Sales Price		$ 19,000
Net Proceeds on Sale		17,771
Gain (Loss) on Sale	[1],[2]	$ (249)
Office Building and Mixed-use Property [Member] | Philadelphia Marine Center (Marine Piers) [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		181,900
Sales Price		$ 21,400
Net Proceeds on Sale		11,182
Gain (Loss) on Sale	[1],[3]	$ 6,498
Office Building and Mixed-use Property [Member] | 11700, 11710, 11720 & 11740 Beltsville Drive (Calverton) [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of Properties Sold | property		3
Rentable Square Feet | ft²		313,810
Sales Price		$ 9,000
Net Proceeds on Sale		8,354
Gain (Loss) on Sale	[1],[4]	$ 0
Office Building and Mixed-use Property [Member] | 1200 & 1220 Concord Avenue (Concord Airport Plaza) [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of Properties Sold | property		2
Rentable Square Feet | ft²		350,256
Sales Price		$ 33,100
Net Proceeds on Sale		32,010
Gain (Loss) on Sale	[1],[5]	$ 551

[1] Gain/(Loss) on Sale is net of closing and other transaction related costs.

[2] During the fourth quarter of 2016, the Company recognized a $7.3 million impairment related to these properties.

[3] On March 15, 2017, the Company sold its sublease interest in the Piers at Penn’s Landing (the “Marine Piers”), which includes leasehold improvements containing 181,900 net rentable square feet, and a marina, located in Philadelphia, Pennsylvania for a sales price of $21.4 million, which will be paid in two installments. On the closing date, the buyer paid $12.0 million in cash. On the second purchase price installment date, the buyer will pay $9.4 million. The second purchase price installment is due on (a) January 31, 2020, in the event that the tenant at the Marine Piers does not exercise its existing option to extend the term of the sublease or (b) January 15, 2024, in the event that the tenant does exercise its current extension option to extend the term of the sublease. In accordance with ASC 360-20, Real Estate Sales, the Company determined that it is appropriate to account for the sales transaction under the cost recovery method. The Company received cash proceeds of $11.2 million, after closing costs and prorations, and the net book value of the Marine Piers was $4.7 million, resulting in a gain on sale of $6.5 million. The remaining gain on sale of $9.4 million will be recognized on the second purchase price installment date.

[4] During the fourth quarter of 2016, the Company recognized a $3.0 million impairment related to these properties. During the first quarter of 2017, there was a price reduction of $1.7 million under the agreement of sale and an additional impairment of $1.7 million was recognized.

[5] This sale is designated as a like-kind exchange under Section 1031 of the Internal Revenue Code (“IRC”) and, as such, the proceeds, totaling $32.0 million after closing costs and prorations, were deposited with a Qualified Intermediary, as defined under the IRC. The proceeds received at closing were recorded as “Other assets” in the Company’s consolidated balance sheet as of March 31, 2017. During the fourth quarter of 2016, the Company recognized a $11.5 million impairment related to these properties.

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Real Estate Investments - Summary of Office Properties Sold (Parenthetical) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) ft² Installment	Dec. 31, 2016 USD ($)	Mar. 31, 2016 USD ($)
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from the sale of properties	$ 74,159		$ 704,911
Assets held for sale, net	6,262	$ 41,718
Net gain on disposition of real estate	$ 7,323		$ 115,456
200, 210 & 220 Lake Drive East (Woodland Falls) [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Provision for impairment on assets held for sale		7,300
Philadelphia Marine Center (Marine Piers) [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Rentable Square Feet | ft²	181,900
Sales Price	$ 21,400
Number of installments | Installment	2
First installment payment	$ 12,000
Second installment payment	$ 9,400
Date of second installment payment	Jan. 31, 2020
Proceeds from the sale of properties	$ 11,200
Assets held for sale, net	4,700
Net gain on disposition of real estate	6,500
Deferred gain on sale	9,400
11700, 11710, 11720 & 11740 Beltsville Drive (Calverton) [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Provision for impairment on assets held for sale	1,700	3,000
Purchase price reduction	1,700
1200 & 1220 Concord Avenue (Concord Airport Plaza) [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Provision for impairment on assets held for sale		$ 11,500
Proceeds after closing costs and prorations	$ 32,000

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Real Estate Investments - Summary of Land Parcels Sold (Details) $ in Thousands		3 Months Ended
		Mar. 31, 2017 USD ($) a Parcel	Mar. 31, 2016 USD ($)
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from the sale of properties		$ 74,159	$ 704,911
Gain on Sale		$ 7,323	$ 115,456
Land [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of Parcels | Parcel		2
Acreage of land | a		6.5
Sales Price		$ 4,600
Proceeds from the sale of properties		4,320
Gain on Sale		$ 0
Gateway L and C [Member] | Land [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of Parcels | Parcel		1
Acreage of land | a		4.8
Sales Price		$ 1,100
Proceeds from the sale of properties		1,043
Gain on Sale	[1]	$ 0
Garza Ranch [Member] | Land [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of Parcels | Parcel		1
Acreage of land | a		1.7
Sales Price		$ 3,500
Proceeds from the sale of properties		3,277
Gain on Sale	[2]	$ 0

[1] During the fourth quarter of 2016, the Company recognized a nominal impairment related to this land parcel.

[2] The Company has a continuing involvement through a completion guaranty, which requires the Company as developer to complete certain infrastructure improvements on behalf of the buyers of the land parcels. The cash received at settlement was recorded as “Deferred income, gains and rent” on the Company’s consolidated balance sheet and the Company will recognize the sale once the infrastructure improvements are complete.

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Real Estate Investments - Summary of Properties Classified as Held for Sale Included in Continuing Operations (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
ASSETS HELD FOR SALE
Total assets held for sale, net	$ 6,262	$ 41,718
LIABILITIES HELD FOR SALE
Total liabilities held for sale	387	$ 81
Held for Sale Properties Included in Continuing Operations [Member] | Other Segment - Retail [Member]
ASSETS HELD FOR SALE
Operating properties	5,576
Accumulated depreciation	(79)
Operating real estate investments, net	5,497
Land held for development	0
Total real estate investments, net	5,497
Other assets	765
Total assets held for sale, net	6,262
LIABILITIES HELD FOR SALE
Other liabilities	387
Total liabilities held for sale	$ 387

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Investment in Unconsolidated Real Estate Ventures (Textual) (Details) ft² in Millions		3 Months Ended
	Jan. 31, 2017 USD ($) property	Mar. 31, 2017 USD ($) property	Mar. 31, 2016 USD ($)	Mar. 31, 2017	Mar. 31, 2017 property	Mar. 31, 2017 ft²	Mar. 31, 2017 Real_Estate_Investment	Mar. 31, 2017 a	Mar. 31, 2017 Apartment_unit	Dec. 31, 2016 USD ($)
Schedule Of Equity Method Investments [Line Items]
Management fees		$ 6,485,000	$ 5,235,000
Accounts receivable		12,099,000								$ 12,446,000
Cash proceeds after the payment of share of the debt and closing costs		27,230,000	4,812,000
Net gain on Real Estate Venture transactions		14,582,000	5,929,000
1919 Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Guarantees, maximum exposure amount		$ 88,900,000
TB-BDN Plymouth Apartments [Member]
Schedule Of Equity Method Investments [Line Items]
Sale of ownership interest percentage	50.00%
Gross sales price	$ 100,500,000
Allocated gross sales value of ownership interest, percentage	50.00%
Guarantee obligations cancelled	$ 3,200,000
Cash proceeds after the payment of share of the debt and closing costs	27,200,000
Net gain on Real Estate Venture transactions	14,600,000
TB-BDN Plymouth Apartments [Member] | Pennsylvania [Member]
Schedule Of Equity Method Investments [Line Items]
Construction Loan	$ 54,000,000
Office Properties [Member]
Schedule Of Equity Method Investments [Line Items]
Number of Properties Sold | property		8
Multi-Family Complex [Member] | TB-BDN Plymouth Apartments [Member]
Schedule Of Equity Method Investments [Line Items]
Number of Properties Sold | property	398
Real Estate Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Management fees		$ 1,500,000	$ 1,500,000
Accounts receivable		1,600,000								$ 1,400,000
Unconsolidated Real Estate Ventures [Member]
Schedule Of Equity Method Investments [Line Items]
Number of Unconsolidated Investments in Real Estate Ventures | Real_Estate_Investment							13
Equity Method Investments including net liabilities		264,900,000
Real estate ventures aggregate indebtedness to third parties		953,800,000
Unconsolidated Real Estate Ventures [Member] | TB-BDN Plymouth Apartments [Member]
Schedule Of Equity Method Investments [Line Items]
Equity in income (loss) of Real Estate Ventures	$ 12,600,000
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%
Unconsolidated Real Estate Ventures [Member] | Seven Real Estate Ventures [Member] | Office Properties [Member]
Schedule Of Equity Method Investments [Line Items]
Number of Unconsolidated Investments in Real Estate Ventures | Real_Estate_Investment							7
Rentable Square Feet | ft²						8.0
Unconsolidated Real Estate Ventures [Member] | 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_Investment							2
Acreage of land | a								4.3
Unconsolidated Real Estate Ventures [Member] | Two Other 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_Investment							2
Acreage of land | a								1.4
Unconsolidated Real Estate Ventures [Member] | Two Other Real Estate Ventures [Member] | Residential Tower One [Member]
Schedule Of Equity Method Investments [Line Items]
Number of Unconsolidated Investments in Real Estate Ventures | Real_Estate_Investment							1
Number of Property units					345				345
Unconsolidated Real Estate Ventures [Member] | Two Other Real Estate Ventures [Member] | Residential Tower Two [Member]
Schedule Of Equity Method Investments [Line Items]
Number of Unconsolidated Investments in Real Estate Ventures | Real_Estate_Investment							1
Number of Property units					321				321
evo at Cira Centre South Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Guarantees, maximum exposure amount		55,400,000
PJP VII [Member]
Schedule Of Equity Method Investments [Line Items]
Guarantees, maximum exposure amount		$ 400,000

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Investment in Unconsolidated Real Estate Ventures - Summary of Financial Position of Real Estate Ventures (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Schedule Of Equity Method Investments [Line Items]
Company’s share of equity (Company’s basis)		$ 264,941	$ 281,331
Unconsolidated Real Estate Ventures [Member]
Schedule Of Equity Method Investments [Line Items]
Net property		1,405,986	1,483,067
Other assets		210,032	231,972
Other liabilities		107,161	129,486
Debt, net		946,891	989,738
Equity		561,966	595,815
Company’s share of equity (Company’s basis)	[1]	$ 264,941	$ 281,331

[1] 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.

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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, 2017	Mar. 31, 2016
Schedule Of Equity Method Investments [Line Items]
Equity in loss of Real Estate Ventures		$ (748)	$ (403)
Unconsolidated Real Estate Ventures [Member]
Schedule Of Equity Method Investments [Line Items]
Revenue		54,279	46,525
Operating expenses		(25,166)	(26,668)
Interest expense, net		(10,830)	(8,989)
Depreciation and amortization		(20,761)	(20,160)
Net loss	[1]	(2,478)	(9,292)
Equity in loss of Real Estate Ventures		$ (748)	$ (403)

[1] The three-month period ended March 31, 2016 amount includes $6.4 million of acquisition deal costs related to the formation of the MAP Venture during the three-month period ended March 31, 2016.

XML

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, 2016 USD ($)
MAP Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Acquisition deal costs	$ 6.4

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Intangible Assets and Liabilities - Intangible Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Intangible Assets [Line Items]
Intangible Assets, Total Cost	$ 131,935	$ 160,681
Intangible Assets, Accumulated Amortization	(67,713)	(88,203)
Intangible Assets, net	64,222	72,478
Acquired Lease Intangibles, Net	16,604	18,119
Below market leases [Member]
Intangible Assets [Line Items]
Acquired Lease Intangibles, Gross	30,683	37,579
Acquired Lease Intangibles, Accumulated Amortization	(14,079)	(19,460)
Acquired Lease Intangibles, Net	16,604	18,119
In-place lease value [Member]
Intangible Assets [Line Items]
Intangible Assets, Total Cost	114,196	142,889
Intangible Assets, Accumulated Amortization	(54,834)	(75,696)
Intangible Assets, net	59,362	67,193
Tenant relationship value [Member]
Intangible Assets [Line Items]
Intangible Assets, Total Cost	13,036	13,074
Intangible Assets, Accumulated Amortization	(10,378)	(10,167)
Intangible Assets, net	2,658	2,907
Above market leases acquired [Member]
Intangible Assets [Line Items]
Intangible Assets, Total Cost	4,703	4,718
Intangible Assets, Accumulated Amortization	(2,501)	(2,340)
Intangible Assets, net	$ 2,202	$ 2,378

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Intangible Assets and Liabilities - Annual Amortization of Intangible Assets, Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Assets
2017 (nine months remaining)	$ 11,409
2018	11,754
2019	10,536
2020	8,457
2021	5,971
Thereafter	16,095
Intangible Assets, net	64,222	$ 72,478
Liabilities
2017 (nine months remaining)	1,809
2018	2,196
2019	1,885
2020	1,337
2021	807
Thereafter	8,570
Acquired Lease Intangibles, Net	$ 16,604	$ 18,119

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Debt Obligations - Consolidated Debt Obligations Outstanding (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017		Dec. 31, 2016	Dec. 31, 2015
Consolidated debt obligations
Total Debt Obligations		$ 2,012,671		$ 2,013,112
Secured Debt [Member]
Consolidated debt obligations
Long-term Debt, Gross		323,823		325,038
Plus: premiums/(discounts), net		(2,652)		(2,761)
Less: deferred financing costs		(687)		(728)
Total mortgage indebtedness		320,484		321,549
Unsecured Debt [Member]
Consolidated debt obligations
Long-term Debt, Gross		1,703,610		1,703,610
Plus: premiums/(discounts), net		(4,424)		(4,678)
Less: deferred financing costs		(6,999)		(7,369)
Total unsecured indebtedness		1,692,187		1,691,563
Two Logan Square [Member] | Secured Debt [Member]
Consolidated debt obligations
Long-term Debt, Gross		$ 85,625		86,012
Effective interest rate		3.98%
Debt instrument maturity date		May 01, 2020
One Commerce Square [Member] | Secured Debt [Member]
Consolidated debt obligations
Long-term Debt, Gross		$ 126,198		127,026
Effective interest rate		3.64%	[1]		3.64%
Debt instrument maturity date		Apr. 05, 2023
Two Commerce Square [Member] | Secured Debt [Member]
Consolidated debt obligations
Long-term Debt, Gross		$ 112,000		112,000
Effective interest rate	[2]	4.51%
Debt instrument maturity date		Apr. 05, 2023
Seven Year Term Loan - Swapped to fixed [Member] | Unsecured Debt [Member]
Consolidated debt obligations
Long-term Debt, Gross		$ 250,000		250,000
Effective interest rate		3.72%
Debt instrument maturity date		Oct. 01, 2022
$300.0M 5.70% Guaranteed Notes due 2017 [Member] | Unsecured Debt [Member]
Consolidated debt obligations
Long-term Debt, Gross		$ 300,000		300,000
Effective interest rate		5.68%
Debt instrument maturity date		May 01, 2017
$325.0M 4.95% Guaranteed Notes due 2018 [Member] | Unsecured Debt [Member]
Consolidated debt obligations
Long-term Debt, Gross		$ 325,000		325,000
Effective interest rate		5.13%
Debt instrument maturity date		Apr. 15, 2018
$250M 3.95% Guaranteed Notes due 2023 [Member] | Unsecured Debt [Member]
Consolidated debt obligations
Long-term Debt, Gross		$ 250,000		250,000
Effective interest rate		4.02%
Debt instrument maturity date		Feb. 15, 2023
250.0M 4.10% Guaranteed Notes due 2024 [Member] | Unsecured Debt [Member]
Consolidated debt obligations
Long-term Debt, Gross		$ 250,000		250,000
Effective interest rate		4.33%
Debt instrument maturity date		Oct. 01, 2024
$250M 4.55% Guaranteed Notes due 2029 [Member] | Unsecured Debt [Member]
Consolidated debt obligations
Long-term Debt, Gross		$ 250,000		250,000
Effective interest rate		4.60%
Debt instrument maturity date		Oct. 01, 2029
Indenture IA (Preferred Trust I) [Member] | Unsecured Debt [Member]
Consolidated debt obligations
Long-term Debt, Gross		$ 27,062		27,062
Effective interest rate		2.75%
Debt instrument maturity date		Mar. 30, 2035
Indenture IB (Preferred Trust I) [Member] | Unsecured Debt [Member]
Consolidated debt obligations
Long-term Debt, Gross		$ 25,774		25,774
Effective interest rate		3.30%
Debt instrument maturity date		Apr. 30, 2035
Indenture II (Preferred Trust II) [Member] | Unsecured Debt [Member]
Consolidated debt obligations
Long-term Debt, Gross		$ 25,774		$ 25,774
Effective interest rate		3.09%
Debt instrument maturity date		Jul. 30, 2035

[1] This loan was assumed upon acquisition of the related properties on December 19, 2013. On December 29, 2015, the Company refinanced the debt increasing the principal balance to $130.0 million and extended the term of the scheduled maturity from January 6, 2016 to April 5, 2023.  The effective interest rate as of December 31, 2015 was 3.64%.  A default under this loan will also constitute a default under the loan outstanding on Two Commerce Square. This loan is also secured by a lien on Two Commerce Square.

[2] This loan was assumed upon acquisition of the related property on December 19, 2013. The interest rate reflects the market rate at the time of acquisition. A default under this loan will also constitute a default under the loan outstanding on One Commerce Square. This loan is also secured by a lien on One Commerce Square.

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Debt Obligations - Consolidated Debt Obligations Outstanding (Parenthetical) (Details) - One Commerce Square [Member] - Secured Debt [Member] - USD ($) $ in Millions		3 Months Ended
	Dec. 29, 2015	Mar. 31, 2017		Dec. 31, 2015
Debt Instrument [Line Items]
Debt instrument increase in principal	$ 130.0
Debt instrument maturity date		Apr. 05, 2023
Effective interest rate		3.64%	[1]	3.64%

[1] This loan was assumed upon acquisition of the related properties on December 19, 2013. On December 29, 2015, the Company refinanced the debt increasing the principal balance to $130.0 million and extended the term of the scheduled maturity from January 6, 2016 to April 5, 2023.  The effective interest rate as of December 31, 2015 was 3.64%.  A default under this loan will also constitute a default under the loan outstanding on Two Commerce Square. This loan is also secured by a lien on Two Commerce Square.

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Debt Obligations (Textual) (Details) - USD ($)	May 15, 2015	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Revolving Credit Facility [Member] | New Credit Facility [Member]
Debt Instrument [Line Items]
Debt term	4 years
Maximum borrowing capacity	$ 600,000,000
Line of credit		$ 0		$ 0
Secured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Weighted Average Interest Rate		4.03%	4.03%
Long-term Debt, Gross		$ 323,823,000	$ 325,038,000

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Fair Value of Financial Instruments - Financial Instruments for which Estimates of Fair Value Differ from Carrying Amounts (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Mortgage notes payable, net		$ 320,484	$ 321,549
Carrying Amount [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Note receivable	[1]	3,401	3,380
Carrying Amount [Member] | Unsecured Notes Payable [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Unsecured notes payable		1,365,398	1,364,854
Carrying Amount [Member] | Variable Rate Debt [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Variable rate debt		326,789	326,709
Carrying Amount [Member] | Mortgages Notes Payable [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Mortgage notes payable, net		320,484	321,549
Fair Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Note receivable, fair value	[1]	3,918	3,717
Fair Value [Member] | Unsecured Notes Payable [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt instrument, fair value		1,381,975	1,372,758
Fair Value [Member] | Variable Rate Debt [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt instrument, fair value		307,917	307,510
Fair Value [Member] | Mortgages Notes Payable [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt instrument, fair value		$ 327,144	$ 328,853

[1] The inputs to originate the loan are unobservable and, as a result, are categorized as Level 3. The Company determined fair value by calculating the present value of the cash payments to be received through the maturity date of the loan. See Note 2, “Summary of Significant Accounting Policies,” to the Company’s 2016 Annual Report on Form 10-K for the year ended December 31, 2016 for further information regarding the note origination.

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Fair Value of Financial Instruments (Textual) (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Variable rate and mortgage debt [Member]
Fair Value Inputs Liabilities Quantitative Information [Line Items]
Discount Rates	4.507%	4.353%

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Limited Partners' Non-Controlling Interests in the Parent Company (Textual) (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Noncontrolling Interest [Abstract]
Aggregate amount related to non-controlling interests classified within equity	$ 14.9	$ 14.9
Settlement value of non controlling interest in operating partnership	$ 24.0	$ 24.4

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Fair Value of Derivative Financial Instruments - Terms and Fair Values of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Derivatives Fair Value [Line Items]
Notional Amount	$ 328,610	$ 328,610
3.718% Interest Rate Swap Maturing October 8, 2022 [Member] | Cash Flow Hedging [Member]
Derivatives Fair Value [Line Items]
Derivative, Fixed Interest Rate	3.718%
Derivative Asset, Notional Amount	$ 250,000	250,000
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	4,572	3,733
3.300% Interest Rate Swap Maturing January 30, 2021 [Member] | Cash Flow Hedging [Member]
Derivatives Fair Value [Line Items]
Derivative Liability, Notional Amount	$ 25,774	25,774
Derivative, Fixed Interest Rate	3.30%
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	$ (169)	(300)
3.090% Interest Rate Swap Maturing October 30, 2019 [Member] | Cash Flow Hedging [Member]
Derivatives Fair Value [Line Items]
Derivative Liability, 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	$ (93)	(214)
2.750% Interest Rate Swap Maturing September 30, 2017 [Member] | Cash Flow Hedging [Member]
Derivatives Fair Value [Line Items]
Derivative Liability, 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	$ (37)	$ (83)

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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, 2017	Mar. 31, 2016
Numerator
Income from continuing operations, Basic	$ 21,271	$ 46,310
Net income from continuing operations attributable to non-controlling interests, Basic	(169)	(389)
Nonforfeitable dividends allocated to unvested restricted shareholders, Basic	(99)	(105)
Distribution to preferred shareholders	(1,725)	(1,725)
Net income attributable to Common Shareholders of Brandywine Realty Trust	19,278	44,091
Net income from continuing operations attributable to non-controlling interests, Diluted	(169)	(389)
Nonforfeitable dividends allocated to unvested restricted shareholders, Diluted	(99)	(105)
Net income attributable to common shareholders, Diluted	$ 19,278	$ 44,091
Denominator
Basic weighted average shares outstanding (in shares)	175,176,964	174,788,945
Contingent securities/Share based compensation (in shares)	1,024,908	682,468
Diluted weighted average shares outstanding (in shares)	176,201,872	175,471,413
Earnings per Common Share:
Net income attributable to common shareholders, Basic (USD per share)	$ 0.11	$ 0.25
Net income attributable to common shareholders, Diluted (USD per share)	$ 0.11	$ 0.25

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Beneficiaries Equity of the Parent Company (Textual) (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended		12 Months Ended
	Mar. 10, 2017	Mar. 01, 2017	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Class of Stock [Line Items]
Dividends, Common Stock		$ 28,300
Preferred Stock, Dividend Rate, Percentage			6.90%		6.90%
Dividends, Preferred Stock			$ 1,725	$ 1,725
Redemption outstanding shares			4,000,000		4,000,000
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage			6.90%		6.90%
Dividends, Preferred Stock			$ 1,725	$ 1,725
Redemption outstanding shares			4,000,000		4,000,000
Series E Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage			6.90%
Preferred Stock, Liquidation Preference Per Share			$ 25.00
Dividends, Preferred Stock		$ 1,700
Redemption outstanding shares	4,000,000
Redemption price per share	$ 25.00
Series E Preferred Stock [Member] | BRANDYWINE OPERATING PARTNERSHIP, L.P.
Class of Stock [Line Items]
Redemption outstanding shares	4,000,000
Redemption price per share	$ 25.00
Redemption date	Apr. 11, 2017
Dividend Declared [Member]
Class of Stock [Line Items]
Dividends Payable, Amount Per Share		$ 0.16
Dividend Declared [Member] | BRANDYWINE OPERATING PARTNERSHIP, L.P.
Class of Stock [Line Items]
Dividends Payable, Amount Per Share		$ 0.16
Redeemable Common Limited Partnership Units [Member]
Class of Stock [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share			1,479,799	1,535,102

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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, 2017	Mar. 31, 2016
Numerator
Income from continuing operations, Basic	$ 21,271	$ 46,310
Nonforfeitable dividends allocated to unvested restricted shareholders, Basic	(99)	(105)
Distribution to preferred shareholders	(1,725)	(1,725)
Nonforfeitable dividends allocated to unvested restricted shareholders, Diluted	$ (99)	$ (105)
Denominator
Basic weighted average shares outstanding (in shares)	175,176,964	174,788,945
Contingent securities/Share based compensation (in shares)	1,024,908	682,468
Diluted weighted average shares outstanding (in shares)	176,201,872	175,471,413
Earnings per Common Partnership Unit
Net income attributable to common unitholders, Basic (USD per share)	$ 0.11	$ 0.25
Net income attributable to common unitholders, Diluted (USD per share)	$ 0.11	$ 0.25
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Numerator
Income from continuing operations, Basic	$ 21,271	$ 46,310
Nonforfeitable dividends allocated to unvested restricted shareholders, Basic	(99)	(105)
Distribution to preferred shareholders	(1,725)	(1,725)
Net income attributable to non-controlling interests	(5)	(2)
Net income attributable to common unitholders, Basic	19,442	44,478
Nonforfeitable dividends allocated to unvested restricted shareholders, Diluted	(99)	(105)
Net income attributable to common unitholders, Diluted	$ 19,442	$ 44,478
Denominator
Basic weighted average shares outstanding (in shares)	176,656,763	176,324,047
Contingent securities/Share based compensation (in shares)	1,024,908	682,468
Diluted weighted average shares outstanding (in shares)	177,681,671	177,006,515
Earnings per Common Partnership Unit
Net income attributable to common unitholders, Basic (USD per share)	$ 0.11	$ 0.25
Net income attributable to common unitholders, Diluted (USD per share)	$ 0.11	$ 0.25

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Partners Equity of the Operating Partnership (Textual) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended	12 Months Ended
	Mar. 01, 2017	Mar. 31, 2017	Dec. 31, 2016	Mar. 10, 2017	Mar. 31, 2016
Earnings Per Common Partnership Unit [Line Items]
Distributions payable		$ 30,047	$ 30,032		$ 28,278
Preferred Stock, Dividend Rate, Percentage		6.90%	6.90%
Preferred Stock, Shares Outstanding		4,000,000	4,000,000
Series E Preferred Stock [Member]
Earnings Per Common Partnership Unit [Line Items]
Preferred Stock, Dividend Rate, Percentage		6.90%
Preferred Stock, Liquidation Preference Per Share		$ 25.00
Preferred Stock, Shares Outstanding				4,000,000
Redemption price per share				$ 25.00
Dividend Declared [Member]
Earnings Per Common Partnership Unit [Line Items]
Dividends Payable, Amount Per Share	$ 0.16
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Earnings Per Common Partnership Unit [Line Items]
Distributions payable		$ 30,047	$ 30,032		$ 28,278
Preferred Stock, Dividend Rate, Percentage		6.90%	6.90%
Preferred Stock, Shares Outstanding		4,000,000	4,000,000
BRANDYWINE OPERATING PARTNERSHIP, L.P. | 6.90% Series E-linked Preferred Units [Member]
Earnings Per Common Partnership Unit [Line Items]
Preferred Stock, Dividend Rate, Percentage		6.90%
Preferred Stock, Liquidation Preference Per Share		$ 25.00
BRANDYWINE OPERATING PARTNERSHIP, L.P. | Series E Preferred Stock [Member]
Earnings Per Common Partnership Unit [Line Items]
Preferred Stock, Shares Outstanding				4,000,000
Redemption price per share				$ 25.00
BRANDYWINE OPERATING PARTNERSHIP, L.P. | Dividend Declared [Member]
Earnings Per Common Partnership Unit [Line Items]
Dividends Payable, Amount Per Share	$ 0.16
BRANDYWINE OPERATING PARTNERSHIP, L.P. | Dividend Paid [Member]
Earnings Per Common Partnership Unit [Line Items]
Distributions payable		$ 28,300
BRANDYWINE OPERATING PARTNERSHIP, L.P. | Dividend Paid [Member] | 6.90% Series E-linked Preferred Units [Member]
Earnings Per Common Partnership Unit [Line Items]
Dividends, Preferred Stock, Cash	$ 1,700

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Share Based Compensation, 401(k) Plan and Deferred Compensation (Textual) (Details) $ / shares in Units, $ in Millions				3 Months Ended
	Mar. 07, 2017 Installment shares	Mar. 01, 2017 shares	Feb. 01, 2017 shares	Mar. 31, 2017 USD ($) shares	Mar. 31, 2016 USD ($)	Feb. 06, 2017 $ / shares
Restricted Share Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | shares				618,961
Vesting period				3 years
Unrecognized compensation expenses | $				$ 2.9
Weighted average period over which options will be recognized				1 year 6 months
Share-based compensation expense | $				$ 1.5	$ 1.2
Share-based compensation expense, capitalized | $				$ 0.3	0.3
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period				three years from the initial grant dates
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | shares				141,751
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 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 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 | shares	32,122
Number of Vesting Installments | Installment	2
Restricted 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 | shares		109,629
Share Based Compensation Arrangement By Share Based Payment Award, Vesting Date		Apr. 15, 2020
Restricted 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, 2018
Restricted 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, 2019
Restricted Performance Share Units Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation expenses | $				$ 2.9
Weighted average period over which options will be recognized				1 year 10 months 24 days
Share-based compensation expense | $				$ 2.4	1.7
Share-based compensation expense, capitalized | $				$ 0.5	$ 0.5
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period				3 year
Common shares issued for share based compensation | shares			55,299
Dividends Payable, Amount Per Share | $ / shares						$ 0.16
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, Grants in Period | shares				174,854
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

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Share Based Compensation, 401(k) Plan and Deferred Compensation - Restricted Share Activity (Details) - Restricted Share Awards [Member]	3 Months Ended
	Mar. 31, 2017 USD ($) $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non-vested at January 1, 2017, Shares | shares	488,604
Granted, shares | shares	141,751
Vested, shares | shares	(9,394)
Forfeited, shares | shares	(2,000)
Non-vested at March 31, 2017, Shares | shares	618,961
Non-vested at January 1, 2016, Weighted Average Grant Date Fair Value | $ / shares	$ 14.10
Granted, Weighted Average Grant Date Fair Value | $ / shares	16.68
Vested, Weighted Average Grant Date Fair Value | $ / shares	14.90
Forfeited, Weighted Average Grant Date Fair Value | $ / shares	13.58
Non-vested at December 31, 2016, Weighted Average Grant Date Fair Value | $ / shares	$ 14.68
Non-vested at January 1, 2016, Aggregate Intrinsic Value | $	$ 8,066,852
Granted, Aggregate Intrinsic Value | $	2,364,127
Vested, Aggregate Intrinsic Value | $	153,216
Non-vested at December 31, 2016, Aggregate Intrinsic Value | $	$ 10,045,737

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Share Based Compensation, 401(k) Plan and Deferred Compensation - Restricted Performance Share Units (Details) - Restricted Performance Share Units Plan [Member] - Executive Officer [Member] - USD ($) $ in Thousands				3 Months Ended
	Mar. 01, 2017	Feb. 22, 2016	Feb. 23, 2015	Mar. 31, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non-vested at January 1, 2017, Shares				378,977
Granted, shares				174,854
Units Cancelled				0
Non-vested at March 31, 2017, Shares				553,831
Units Granted	174,854	231,388	186,395
Fair Value of Units on Grant Date (in thousands)	$ 3,735	$ 3,558	$ 3,933
February 23, 2015 RSPU Grant [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non-vested at January 1, 2017, Shares				147,589
Granted, shares				0
Units Cancelled				0
Non-vested at March 31, 2017, Shares				147,589
Measurement Period Commencement Date				Jan. 01, 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, 2017, Shares				231,388
Granted, shares				0
Units Cancelled				0
Non-vested at March 31, 2017, Shares				231,388
Measurement Period Commencement Date				Jan. 01, 2016
Measurement Period End Date				Dec. 31, 2018
March 01, 2017 RSPU Grant [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non-vested at January 1, 2017, Shares				0
Granted, shares				174,854
Units Cancelled				0
Non-vested at March 31, 2017, Shares				174,854
Measurement Period Commencement Date				Jan. 01, 2017
Measurement Period End Date				Dec. 31, 2019

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Segment Information (Textual) (Details)		3 Months Ended
	Feb. 02, 2017 property	Mar. 31, 2017 property segment
Segment Reporting Information [Line Items]
Number of Reportable Segments | segment		5
Office Properties [Member]
Segment Reporting Information [Line Items]
Number of Properties Sold		8
Office Properties [Member] | 1200 & 1220 Concord Avenue (Concord Airport Plaza) [Member]
Segment Reporting Information [Line Items]
Number of Properties Sold	2

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Segment Information - Real Estate Investments, at Cost of Company's Reportable Segments (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Operating properties		$ 3,702,204	$ 3,586,295
Assets held for sale	[1],[2]	5,576	73,591
Operating Properties		3,707,780	3,659,886
Construction-in-progress		166,372	297,462
Land held for development		153,268	150,970
Philadelphia CBD [Member]
Segment Reporting Information [Line Items]
Operating properties		1,471,258	1,320,974
Pennsylvania Suburbs [Member]
Segment Reporting Information [Line Items]
Operating properties		1,006,780	1,005,446
Metropolitan DC [Member]
Segment Reporting Information [Line Items]
Operating properties		974,838	975,987
Austin, Texas [Member]
Segment Reporting Information [Line Items]
Operating properties		146,858	146,794
Other [Member]
Segment Reporting Information [Line Items]
Operating properties		$ 102,470	$ 137,094

[1] As of March 31, 2017, the Company categorized a retail property located in the Other segment as held for sale in accordance with applicable accounting standards for long lived assets. See Note 3, “Real Estate Investments,” for further information.

[2] Real estate investments related to assets held for sale above represents gross real estate assets and does not include accumulated depreciation or other assets on the balance sheet of the property held for sale. See “Held for Sale” below in this Note 3.

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Segment Information - Net Operating Income of Company's Reportable Segments (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Total revenue		$ 130,920	$ 136,502
Operating expenses	[1]	(51,081)	(54,775)
Net operating income		79,839	81,727
Operating Segments [Member] | Philadelphia CBD [Member]
Segment Reporting Information [Line Items]
Total revenue		54,449	49,670
Operating expenses	[1]	(20,837)	(19,256)
Net operating income		33,612	30,414
Operating Segments [Member] | Pennsylvania Suburbs [Member]
Segment Reporting Information [Line Items]
Total revenue		35,655	37,106
Operating expenses	[1]	(12,584)	(13,155)
Net operating income		23,071	23,951
Operating Segments [Member] | Metropolitan DC [Member]
Segment Reporting Information [Line Items]
Total revenue		23,362	27,339
Operating expenses	[1]	(9,383)	(10,899)
Net operating income		13,979	16,440
Operating Segments [Member] | Austin, Texas [Member]
Segment Reporting Information [Line Items]
Total revenue		9,123	8,547
Operating expenses	[1]	(3,573)	(3,255)
Net operating income		5,550	5,292
Operating Segments [Member] | Other [Member]
Segment Reporting Information [Line Items]
Total revenue		6,362	12,740
Operating expenses	[1]	(3,856)	(7,602)
Net operating income		2,506	5,138
Corporate [Member]
Segment Reporting Information [Line Items]
Total revenue		1,969	1,100
Operating expenses	[1]	(848)	(608)
Net operating income		$ 1,121	$ 492

[1] Includes property operating expense, real estate taxes and third party management expense.

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Segment Information - Unconsolidated Real Estate Ventures of Company's Reportable Segments (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Investment in Real Estate Ventures, at equity		$ 264,941		$ 281,331
Equity in loss of Real Estate Ventures		(748)	$ (403)
Philadelphia CBD [Member]
Segment Reporting Information [Line Items]
Investment in Real Estate Ventures, at equity		44,618		48,691
Equity in loss of Real Estate Ventures		(67)	455
Pennsylvania Suburbs [Member]
Segment Reporting Information [Line Items]
Investment in Real Estate Ventures, at equity		3,147		15,421
Equity in loss of Real Estate Ventures		276	265
Metropolitan DC [Member]
Segment Reporting Information [Line Items]
Investment in Real Estate Ventures, at equity		143,591		141,786
Equity in loss of Real Estate Ventures		467	(448)
MAP Venture [Member]
Segment Reporting Information [Line Items]
Investment in Real Estate Ventures, at equity	[1]	17,776		20,893
Equity in loss of Real Estate Ventures	[1]	(1,117)	(556)
Other [Member]
Segment Reporting Information [Line Items]
Investment in Real Estate Ventures, at equity		1,713		1,654
Equity in loss of Real Estate Ventures		58	161
Austin, Texas [Member]
Segment Reporting Information [Line Items]
Investment in Real Estate Ventures, at equity		54,096		$ 52,886
Equity in loss of Real Estate Ventures		$ (365)	$ (280)

[1] 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. The MAP Venture’s business operations, including properties in Richmond, Virginia; Metropolitan Washington, D.C.; 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.

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Segment Information - Reconciliation of Consolidated NOI to Consolidated Net Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting [Abstract]
Consolidated net operating income	$ 79,839	$ 81,727
Less:
Interest expense	(21,437)	(23,691)
Interest expense - amortization of deferred financing costs	(634)	(774)
Interest expense - financing obligation	0	(281)
Depreciation and amortization	(45,892)	(48,873)
General and administrative expenses	(9,425)	(9,120)
Equity in loss of Real Estate Ventures	(748)	(403)
Provision for impairment	(2,730)	(7,390)
Loss on early extinguishment of debt	0	(66,590)
Plus:
Interest income	393	320
Net gain on disposition of real estate	7,323	115,456
Net gain on Real Estate Venture transactions	14,582	5,929
Net income	$ 21,271	$ 46,310

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Commitments and Contingencies (Textual) (Details)			3 Months Ended
	Dec. 03, 2015 ft²	Apr. 02, 2015 USD ($)	Mar. 31, 2017 USD ($) a	Jul. 01, 2016 USD ($) a
Subaru Corporate Headquarters Project [Member]
Property Subject to or Available for Operating Lease [Line Items]
NTE Amount			$ 78,100,000
Subaru Build-to-Service Center Project [Member]
Property Subject to or Available for Operating Lease [Line Items]
Lease terms	18 years
Rentable Square Feet | ft²	83,000
Purchase option of lease from inception period	5 years
Project costs funded			10,800,000
Project costs			44,300,000
1919 Venture [Member]
Property Subject to or Available for Operating Lease [Line Items]
Guarantees, maximum exposure amount			88,900,000
Unconsolidated Real Estate Ventures [Member]
Property Subject to or Available for Operating Lease [Line Items]
Real estate ventures aggregate indebtedness to third parties			953,800,000
evo at Cira Centre South Venture [Member]
Property Subject to or Available for Operating Lease [Line Items]
Guarantees, maximum exposure amount			55,400,000
PJP VII [Member]
Property Subject to or Available for Operating Lease [Line Items]
Guarantees, maximum exposure amount			400,000
618 Market Street [Member]
Property Subject to or Available for Operating Lease [Line Items]
Contingent consideration, liability		$ 2,000,000	$ 1,800,000
Fair value of contingent consideration		1,600,000
Interest expense		$ 2,000,000
Garza Land Acquisition [Member]
Property Subject to or Available for Operating Lease [Line Items]
Acreage of land | a				34.6
Area of land under agreement to sell | a			8.4
Area of land sold | a			1.7
Infrastructure improvements to land, estimated cost				$ 13,600,000
Put Agreement [Member]
Property Subject to or Available for Operating Lease [Line Items]
Purchase price			$ 35,000,000
Minimum [Member]
Property Subject to or Available for Operating Lease [Line Items]
Lease terms			4 years
Maximum [Member]
Property Subject to or Available for Operating Lease [Line Items]
Lease terms			72 years
Mortgage Lenders [Member]
Property Subject to or Available for Operating Lease [Line Items]
Associated letter of credit			$ 10,000,000

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Commitments and Contingencies - Minimum Future Rental Payments on Non-cancelable Leases (Details) $ in Thousands	Mar. 31, 2017 USD ($)
Commitments And Contingencies Disclosure [Abstract]
2017 (nine months remaining)	$ 904
2018	1,205
2019	1,205
2020	1,205
2021	1,205
Thereafter	57,208
Total	$ 62,932

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Subsequent Events (Textual) (Details) - Series E Preferred Stock [Member] - USD ($) $ / shares in Units, $ in Millions	Apr. 11, 2017	Mar. 10, 2017
Subsequent Event [Line Items]
Redemption price per share		$ 25.00
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Subsequent Event [Line Items]
Redemption date		Apr. 11, 2017
Redemption price per share		$ 25.00
Subsequent Event [Member]
Subsequent Event [Line Items]
Redemption date	Apr. 11, 2017
Redemption of outstanding preferred shares	4,000,000
Redemption price per share	$ 25.00
Distribution payment date	Apr. 17, 2017
Distribution date of record	Mar. 30, 2017
Distribution amount per share	$ 0.50792
Distribution amount paid	$ 102.0
Preferred share redemption charge	$ 3.2
Subsequent Event [Member] | BRANDYWINE OPERATING PARTNERSHIP, L.P.
Subsequent Event [Line Items]
Redemption of outstanding preferred shares	4,000,000