Schedule III - Real Estate and Accumulated Depreciation - Reconciliation of Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]
Balance	$ 460,165	$ 390,916	$ 329,207
Depreciation expenses	82,957	83,774	82,419
Properties sold during the year	(18,476)	0	(10,775)
Property assets fully depreciated and written off	(13,810)	(14,525)	(9,935)
Balance	$ 510,836	$ 460,165	$ 390,916