Property and Equipment Used in Operations (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 177,768	$ 177,114
Less accumulated depreciation	(97,849)	(96,496)
Property and equipment, net	79,919	80,618
Land and improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	30,566	30,540
Building and improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	117,333	117,333
Furniture, fixtures, and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	28,789	28,767
Construction in progress
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 1,080	$ 474