CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Rental income	$ 144,524	$ 149,885
Expenses:
Real estate taxes	16,154	16,807
Utility expenses	6,432	7,012
Other operating expenses	25,439	25,880
Depreciation and amortization	64,087	62,943
Loss on impairment of real estate	7,660	0
General and administrative	11,272	7,109
Total expenses	131,044	119,751
Gain on sale of real estate	54,004	10,756
Interest and other income	5	706
Interest expense (including net amortization of debt premiums, discounts and issuance costs of $2,432 and $2,283, respectively)	(28,798)	(27,159)
Loss on early extinguishment of debt	0	(3,282)
Income before income tax expense and equity in net losses of investees	38,691	11,155
Income tax expense	(435)	(39)
Equity in net losses of investees	(396)	(276)
Net income	37,860	10,840
Other comprehensive loss:
Unrealized loss on financial instrument	0	(61)
Other comprehensive loss	0	(61)
Comprehensive income	$ 37,860	$ 10,779
Weighted average common shares outstanding (basic) (in shares)	48,161	48,095
Weighted average common shares outstanding (diluted) (in shares)	48,196	48,095
Per common share amounts (basic and diluted):
Net income (in dollars per share)	$ 0.78	$ 0.23