CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Rental income	$ 137,099	$ 145,603	$ 281,623	$ 295,488
Expenses:
Real estate taxes	15,912	15,781	32,066	32,588
Utility expenses	5,310	5,201	11,742	12,213
Other operating expenses	24,898	25,787	50,337	51,667
Depreciation and amortization	55,371	64,170	119,458	127,113
Loss on impairment of real estate	48,197	0	55,857	0
General and administrative	12,970	7,204	24,242	14,313
Total expenses	162,658	118,143	293,702	237,894
Gain on sale of real estate	114	66	54,118	10,822
Interest and other income	2	30	7	736
Interest expense (including net amortization of debt premiums, discounts and issuance costs of $2,492, $2,402, $4,924 and $4,685, respectively)	(29,001)	(25,205)	(57,799)	(52,364)
Loss on early extinguishment of debt	(11,794)	(557)	(11,794)	(3,839)
Income (loss) before income tax (expense) benefit and equity in net losses of investees	(66,238)	1,794	(27,547)	12,949
Income tax (expense) benefit	121	(235)	(314)	(274)
Equity in net losses of investees	(580)	(260)	(976)	(536)
Net income (loss)	(66,697)	1,299	(28,837)	12,139
Other comprehensive income (loss):
Unrealized gain on financial instrument	0	176	0	115
Other comprehensive income	0	176	0	115
Comprehensive income (loss)	$ (66,697)	$ 1,475	$ (28,837)	$ 12,254
Weighted average common shares outstanding (basic) (in shares)	48,165	48,106	48,163	48,101
Weighted average common shares outstanding (diluted) (in shares)	48,165	48,106	48,163	48,101
Per common share amounts (basic and diluted):
Net income (loss) (in dollars per share)	$ (1.38)	$ 0.03	$ (0.60)	$ 0.25
Net income (loss) (in dollars per share)	$ (1.38)	$ 0.03	$ (0.60)	$ 0.25