CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Rental income	$ 149,885	$ 174,777
Expenses:
Real estate taxes	16,807	18,392
Utility expenses	7,012	9,381
Other operating expenses	25,880	30,136
Depreciation and amortization	62,943	77,521
Loss on impairment of real estate	0	3,204
Acquisition and transaction related costs	0	584
General and administrative	7,109	8,723
Total expenses	119,751	147,941
Gain on sale of real estate	10,756	22,092
Dividend income	0	980
Gain on equity securities	0	22,128
Interest and other income	706	248
Interest expense (including net amortization of debt premiums, discounts and issuance costs of $2,283 and $2,841, respectively)	(27,159)	(37,133)
Loss on early extinguishment of debt	(3,282)	(414)
Income before income tax expense and equity in net losses of investees	11,155	34,737
Income tax expense	(39)	(483)
Equity in net losses of investees	(276)	(235)
Net income	10,840	34,019
Other comprehensive income (loss):
Unrealized loss on financial instrument	(61)	(98)
Equity in unrealized gain of investees	0	66
Other comprehensive loss	(61)	(32)
Comprehensive income	$ 10,779	$ 33,987
Weighted average common shares outstanding (basic) (in shares)	48,095	48,031
Weighted average common shares outstanding (diluted) (in shares)	48,095	48,046
Per common share amounts (basic and diluted):
Net income (in dollars per share)	$ 0.23	$ 0.71