Other Data (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Net income	$ 66,659	$ 72,195	$ 39,185
Reconciling items to taxable income
Depreciation and amortization	69,958	80,624	67,953
Gain or loss on disposition of depreciable assets	(26,631)	(23,898)	(15,689)
Impairments	5,043	0	0
Straight-line rent	(4,331)	7,485	(11,535)
Receivable allowances	2,000	2,494	1,942
Share-based compensation	(2,024)	5,387	2,628
Other	8,702	(2,182)	12,631
Reconciling items to taxable income, total	52,717	69,910	57,930
Taxable income	119,376	142,105	97,115
Dividends paid	$ 175,456	$ 162,557	$ 155,358