Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Ownership interest in subsidiaries (as a percent)	100.00%
Assets of TRSs	$ 31,917	$ 33,305
Liabilities of TRSs	$ 148,459	$ 140,897
Buildings and Improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	40 years
Personal Property | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	12 years