SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION - Reconciliation of Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Real Estate And Accumulated Depreciation Disclosure [Abstract]
Balance at beginning of year	$ 490,227	$ 416,657	$ 339,862
Depreciation related to real estate	104,049	85,317	78,453
Property dispositions	(939)	(11,747)	(1,658)
Right-of-use assets - finance leases reclassified	(6,537)
Balance at end of year	$ 586,800	$ 490,227	$ 416,657