Schedule III - Real Estate and Accumulated Depreciation - Reconciliation of Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]
Balance, beginning of year	$ 747,304	$ 656,900	$ 556,546
Depreciation expense	146,207	130,069	119,490
Disposals	(30,977)	(39,665)	(19,136)
Balance, end of year	$ 862,534	$ 747,304	$ 656,900