SCHEDULE III Accumulated depreciation reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Real Estate and Accumulated Depreciation [Line Items]
Beginning balance	$ 1,442,630	$ 1,237,525	$ 1,026,858
Depreciation for the period	291,605	253,952	236,422
Asset impairment	0	0	(405)
Dispositions and other	(47,255)	(48,847)	(25,350)
Ending balance	$ 1,686,980	$ 1,442,630	$ 1,237,525