CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Real estate properties:
Land		$ 668,918	$ 741,501
Buildings and improvements		6,023,625	6,072,055
Total real estate properties, gross		6,692,543	6,813,556
Accumulated depreciation		(1,828,352)	(1,737,807)
Total real estate properties, net		4,864,191	5,075,749
Investments in unconsolidated joint ventures		155,477	215,127
Assets of properties held for sale		385	0
Cash and cash equivalents		658,065	634,848
Restricted cash	[1]	30,237	382,097
Investments in equity securities		5,880	31,540
Due from affiliates		8,716	0
Acquired real estate leases and other intangible assets, net		45,351	48,746
Other assets, net		233,791	235,407
Total assets		6,002,093	6,623,514
LIABILITIES AND SHAREHOLDERS' EQUITY
Credit facility		700,000	800,000
Senior unsecured notes, net		2,317,700	2,806,811
Secured debt and finance leases, net		30,177	69,713
Accrued interest		29,417	29,845
Due to affiliates		5,202	8,270
Other liabilities		280,986	246,485
Total liabilities		3,363,482	3,961,124
Commitments and contingencies
Shareholders' equity:
Common shares of beneficial interest, $.01 par value: 300,000,000 shares authorized, 239,694,842 and 238,994,894 shares issued and outstanding, respectively		2,397	2,390
Additional paid in capital		4,617,031	4,615,475
Cumulative net income		2,071,850	2,087,624
Cumulative distributions		(4,052,667)	(4,043,099)
Total shareholders' equity		2,638,611	2,662,390
Total liabilities and shareholders' equity		$ 6,002,093	$ 6,623,514

[1] As of December 31, 2022 and 2021, restricted cash consists of proceeds from the sale of joint venture interests and proceeds from the sale of properties to joint ventures held as collateral pursuant to the agreement governing our credit facility, or our credit agreement. We may use these funds to pay for approved expenditures in accordance with our credit agreement. In January 2023, we used the remaining restricted cash held as collateral to repay a portion of the $113,627 reduction in commitments under our credit facility. We continue to be required to hold any proceeds from the sale of properties as restricted cash pursuant to the terms of our credit agreement. Restricted cash also consists of amounts escrowed for real estate taxes, insurance and capital expenditures at certain of our mortgaged properties. Prior to the deconsolidation of the joint venture that owns a life science property located in Boston, Massachusetts, or the Seaport JV, restricted cash also consisted of cash held for the operations of this joint venture.