Consolidated Balance Sheets - USD ($) $ in Thousands		Dec. 31, 2017	Dec. 31, 2016
Real estate investments:
Operating properties		$ 3,832,348	$ 3,586,295
Accumulated depreciation		(895,091)	(852,476)
Operating real estate investments, net		2,937,257	2,733,819
Construction-in-progress		121,188	297,462
Land held for development	[1]	98,242	150,970
Total real estate investments, net		3,156,687	3,182,251
Assets held for sale, net		392	41,718
Cash and cash equivalents		202,179	193,919
Accounts receivable, net of allowance of $3,467 and $2,373 in 2017 and 2016, respectively		17,938	12,446
Accrued rent receivable, net of allowance of $13,645 and $13,743 in 2017 and 2016, respectively		169,760	149,624
Investment in Real Estate Ventures, equity method		194,621	281,331
Deferred costs, net		96,695	91,342
Intangible assets, net		64,972	72,478
Other assets		92,204	74,104
Total assets		3,995,448	4,099,213
LIABILITIES AND EQUITY
Mortgage notes payable, net		317,216	321,549
Unsecured term loans, net		248,429	248,099
Unsecured senior notes, net		1,365,183	1,443,464
Accounts payable and accrued expenses		107,074	103,404
Distributions payable		32,456	30,032
Deferred income, gains and rent		42,593	31,620
Acquired lease intangibles, net		20,274	18,119
Liabilities related to assets held for sale		0	81
Other liabilities		15,623	19,408
Total liabilities		2,148,848	2,215,776
Commitments and contingencies
Equity:
6.90% Series E Preferred Shares, $0.01 par value; issued and outstanding- 0 in 2017 and 4,000,000 in 2016		0	40
Common Shares of Brandywine Realty Trust's beneficial interest, $0.01 par value; shares authorized 400,000,000; 178,285,236 and 175,140,760 issued and outstanding in 2017 and in 2016, respectively		1,784	1,752
Additional paid-in-capital		3,218,564	3,258,870
Deferred compensation payable in common shares		12,445	13,684
Common shares in grantor trust, 894,736 in 2017, 899,457 in 2016		(12,445)	(13,684)
Cumulative earnings		660,174	539,319
Accumulated other comprehensive income (loss)		2,399	(1,745)
Cumulative distributions		(2,053,741)	(1,931,892)
Total Brandywine Realty Trust's equity		1,829,180	1,866,344
Noncontrolling interests		17,420	17,093
Total beneficiaries' equity		1,846,600	1,883,437
Total liabilities and beneficiaries' equity		3,995,448	4,099,213
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Real estate investments:
Operating properties		3,832,348	3,586,295
Accumulated depreciation		(895,091)	(852,476)
Operating real estate investments, net		2,937,257	2,733,819
Construction-in-progress		121,188	297,462
Land held for development		98,242	150,970
Total real estate investments, net		3,156,687	3,182,251
Assets held for sale, net		392	41,718
Cash and cash equivalents		202,179	193,919
Accounts receivable, net of allowance of $3,467 and $2,373 in 2017 and 2016, respectively		17,938	12,446
Accrued rent receivable, net of allowance of $13,645 and $13,743 in 2017 and 2016, respectively		169,760	149,624
Investment in Real Estate Ventures, equity method		194,621	281,331
Deferred costs, net		96,695	91,342
Intangible assets, net		64,972	72,478
Other assets		92,204	74,104
Total assets		3,995,448	4,099,213
LIABILITIES AND EQUITY
Mortgage notes payable, net		317,216	321,549
Unsecured term loans, net		248,429	248,099
Unsecured senior notes, net		1,365,183	1,443,464
Accounts payable and accrued expenses		107,074	103,404
Distributions payable		32,456	30,032
Deferred income, gains and rent		42,593	31,620
Acquired lease intangibles, net		20,274	18,119
Liabilities related to assets held for sale		0	81
Other liabilities		15,623	19,408
Total liabilities		2,148,848	2,215,776
Commitments and contingencies
Redeemable limited partnership units at redemption value; 1,479,799 and 1,535,102 issued and outstanding in 2016 and 2015, respectively		26,918	23,795
Equity:
6.90% Series E Preferred Shares, $0.01 par value; issued and outstanding- 0 in 2017 and 4,000,000 in 2016		0	96,850
Redeemable limited partnership units at redemption value; 1,479,799 issued and outstanding in 2017 and 2016		1,815,411	1,762,764
Accumulated other comprehensive income (loss)		2,056	(2,122)
Total Brandywine Operating Partnership, L.P.'s equity		1,817,467	1,857,492
Noncontrolling interest - consolidated real estate ventures		2,215	2,150
Total partners' equity		1,819,682	1,859,642
Total liabilities and beneficiaries' equity		$ 3,995,448	$ 4,099,213

[1] As of December 31, 2017, the Company categorized 13.1 acres of land held for development 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.