Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment - Components of Property and Equipment (Detail)

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Property and Equipment - Components of Property and Equipment (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Property, Plant and Equipment [Line Items]    
Total, at cost $ 1,022,731 $ 1,006,147
Less accumulated depreciation (313,425) (300,035)
Subtotal 709,306 706,112
Less assets held for sale (8,165) (4,101)
Property and equipment, net 701,141 702,011
Land [Member]
    
Property, Plant and Equipment [Line Items]    
Total, at cost 199,826 194,639
Building and Improvements [Member]
    
Property, Plant and Equipment [Line Items]    
Total, at cost 571,560 569,619
Office Equipment and Fixtures [Member]
    
Property, Plant and Equipment [Line Items]    
Total, at cost 137,451 135,221
Parts and Service Equipment [Member]
    
Property, Plant and Equipment [Line Items]    
Total, at cost 72,973 70,950
Company Vehicles [Member]
    
Property, Plant and Equipment [Line Items]    
Total, at cost 8,203 8,002
Construction in Progress [Member]
    
Property, Plant and Equipment [Line Items]    
Total, at cost $ 32,718 $ 27,716