Property and Equipment Used in Operations (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 262,535	$ 261,542
Less accumulated depreciation	(158,223)	(153,249)
Property and equipment, net	104,312	108,293
Land and improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	30,287	30,276
Building and improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	116,509	116,286
Furniture, fixtures, and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	115,297	114,972
Construction in progress
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 442	$ 8