CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2021		Dec. 31, 2020
Real estate properties:
Land	$ 792,923		$ 789,125
Buildings and improvements	6,695,854		6,621,605
Total real estate properties, gross	7,488,777		7,410,730
Accumulated depreciation	(1,742,606)		(1,694,901)
Total real estate properties, net	5,746,171		5,715,829
Assets of properties held for sale	63,563		112,437
Cash and cash equivalents	843,237		74,417
Restricted cash	326,768	[1]	16,432
Acquired real estate leases and other intangible assets, net	274,987		286,513
Other assets, net	287,980		270,796
Total assets	7,542,706		6,476,424
Liabilities and Equity
Revolving credit facility	800,000		0
Term loan, net	0		199,049
Senior unsecured notes, net	3,101,318		2,608,189
Secured debt and finance leases, net	690,733		691,573
Liabilities of properties held for sale	393		3,525
Accrued interest	52,807		23,772
Assumed real estate lease obligations, net	65,642		67,830
Other liabilities	286,623		263,264
Total liabilities	4,997,516		3,857,202
Commitments and contingencies
Equity attributable to common shareholders:
Common shares of beneficial interest, $.01 par value: 300,000,000 shares authorized, 238,268,478 shares issued and outstanding for both periods presented	2,383		2,383
Additional paid in capital	4,614,132		4,613,904
Cumulative net income	1,845,604		1,913,109
Cumulative distributions	(4,035,942)		(4,033,559)
Total equity attributable to common shareholders	2,426,177		2,495,837
Noncontrolling interest:
Total equity attributable to noncontrolling interest	119,013		123,385
Total equity	2,545,190		2,619,222
Total liabilities and equity	$ 7,542,706		$ 6,476,424
Common shares of beneficial interest, shares issued (in shares)	238,268,478		238,268,478

[1] As of March 31, 2021, restricted cash includes amounts we will use to redeem all $300,000 of our outstanding 6.75% senior notes due 2021 in June 2021, when these notes become redeemable with no prepayment premium. In April 2021, we delivered a notice of redemption with respect to these senior notes for a redemption price equal to the principal amount plus accrued and unpaid interest. Restricted cash also consists of amounts escrowed for real estate taxes, insurance and capital expenditures at certain of our mortgaged properties and cash held for the operations of the life science property that is owned in a joint venture arrangement in which we own a 55% equity interest.