SCHEDULE III REAL ESTATE AND ACCUMULATED DEPRECIATION [Schedule] - Carrying Amount and Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Real Estate Properties
Balance at the beginning of the period	$ 3,944,636	$ 2,975,721	$ 1,888,760
Additions	66,221	1,486,342	1,100,138
Loss on asset impairment	(22,255)	(8,630)	(9,490)
Disposals	(424,302)	(286,837)	(3,687)
Cost basis adjustment	(9,169)	(5,005)
Reclassification of assets of properties held for sale	(61,900)	(216,955)
Balance at the end of the period	3,493,231	3,944,636	2,975,721
Accumulated Depreciation
Balance at the beginning of the period	375,147	341,848	296,804
Additions	89,398	65,215	45,315
Loss on asset impairment	0	0	0
Disposals	(64,167)	(18,740)	(271)
Cost basis adjustment	(9,169)	(5,005)
Reclassification of assets of properties held for sale	(3,553)	(8,171)
Balance at the end of the period	$ 387,656	$ 375,147	$ 341,848