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Property and Equipment - Schedule of Property and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]    
Less accumulated depreciation $ (197,802) $ (167,300)
Property and equipment, net before construction in progress 1,159,969 985,531
Property and equipment, net 1,185,169 1,006,130
Land    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 346,680 318,832
Buildings and improvements    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 685,516 611,798
Service equipment    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 94,121 80,953
Furniture, office equipment, signs and fixtures    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 231,454 141,248
Excluding construction in progress    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 1,357,771 1,152,831
Construction in progress    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 25,200 $ 20,599