CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Rental income	$ 147,354	$ 144,524
Expenses:
Real estate taxes	16,645	16,154
Utility expenses	6,865	6,432
Other operating expenses	27,363	25,439
Depreciation and amortization	60,469	64,087
Loss on impairment of real estate	17,047	7,660
General and administrative	5,706	11,272
Total expenses	134,095	131,044
Gain (Loss) on Sale of Real Estate	2,149	54,004
Interest and other income	1	5
Interest expense (including net amortization of debt premiums, discounts and issuance costs of $2,404 and $2,432, respectively)	(27,439)	(28,798)
Income (loss) before income tax expense and equity in net losses of investees	(12,030)	38,691
Income tax expense	(531)	(435)
Equity in net losses of investees	(846)	(396)
Net income (loss)	$ (13,407)	$ 37,860
Weighted average common shares outstanding (basic) (in shares)	48,243	48,161
Weighted average common shares outstanding (diluted) (in shares)	48,243	48,196
Per common share amounts (basic and diluted):
Net income (loss) per common share - basic (in dollars per share)	$ (0.28)	$ 0.78
Net income (loss) per common share - diluted (in dollars per share)	$ (0.28)	$ 0.78