SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION - Reconciliation of Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Real Estate And Accumulated Depreciation Disclosure [Abstract]
Balance at beginning of year	$ 339,862	$ 287,066	$ 298,703
Depreciation related to real estate	78,453	73,268	49,269
Property dispositions	(1,658)	(20,472)	(27,829)
Deconsolidation of previously consolidated investments			(33,077)
Balance at end of year	$ 416,657	$ 339,862	$ 287,066