Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property and Equipment [Line Items]
Property and equipment, gross	$ 519,800	$ 515,100
Less: accumulated depreciation and amortization	(320,200)	(310,000)
Property and equipment, net	199,585	205,055
Depreciation expense on property equipment	20,600	20,600	$ 22,800
Leaseholds and improvements
Property and Equipment [Line Items]
Property and equipment, gross	252,200	255,400
Equipment and fixtures
Property and Equipment [Line Items]
Property and equipment, gross	90,100	83,400
Properties under capital lease
Property and Equipment [Line Items]
Property and equipment, gross	61,400	59,800
Less: accumulated depreciation and amortization	(43,200)	(41,000)
Buildings and improvements
Property and Equipment [Line Items]
Property and equipment, gross	57,900	57,900
Land
Property and Equipment [Line Items]
Property and equipment, gross	56,400	56,400
Construction in progress
Property and Equipment [Line Items]
Property and equipment, gross	$ 1,800	$ 2,200