Property and Equipment Used in Operations (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 265,928	$ 264,738
Less accumulated depreciation	(168,709)	(163,854)
Property and equipment, net	97,219	100,884
Land and improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	30,463	30,431
Building and improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	116,779	116,776
Furniture, fixtures, and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	118,159	117,247
Construction in progress
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 527	$ 284