Schedule III - Real Estate and Accumulated Depreciation - Accumulated Depreciation Reconciliation (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 at January 1	$ (318,724)	$ (366,265)	$ (426,982)
Additions	(45,615)	(48,376)	(44,270)
Other	44,200	0	0
Dispositions	72,141	95,917	104,987
Balance at December 31	$ (247,998)	$ (318,724)	$ (366,265)