CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Rental income	$ 141,316	$ 137,099	$ 288,670	$ 281,623
Expenses:
Real estate taxes	16,583	15,912	33,228	32,066
Utility expenses	5,820	5,310	12,685	11,742
Other operating expenses	26,497	24,898	53,860	50,337
Depreciation and amortization	57,536	55,371	118,005	119,458
Loss on impairment of real estate	4,773	48,197	21,820	55,857
Acquisition and transaction related costs	224	0	224	0
General and administrative	7,083	12,970	12,789	24,242
Total expenses	118,516	162,658	252,611	293,702
Gain (loss) on sale of real estate	(11,637)	114	(9,488)	54,118
Interest and other income	16	2	17	7
Interest expense (including net amortization of debt premiums, discounts and issuance costs of $2,366, $2,492, $4,770 and $4,924, respectively)	(26,515)	(29,001)	(53,954)	(57,799)
Loss on early extinguishment of debt	(77)	(11,794)	(77)	(11,794)
Loss before income tax (expense) benefit and equity in net losses of investees	(15,413)	(66,238)	(27,443)	(27,547)
Income tax (expense) benefit	190	121	(341)	(314)
Equity in net losses of investees	(833)	(580)	(1,679)	(976)
Net loss	$ (16,056)	$ (66,697)	$ (29,463)	$ (28,837)
Weighted average common shares outstanding (basic) (in shares)	48,249	48,165	48,246	48,163
Weighted average common shares outstanding (diluted) (in shares)	48,249	48,165	48,246	48,163
Per common share amounts (basic and diluted):
Net loss per common share - basic (in dollars per share)	$ (0.33)	$ (1.38)	$ (0.61)	$ (0.60)
Net loss per common share - diluted (in dollars per share)	$ (0.33)	$ (1.38)	$ (0.61)	$ (0.60)