Annual report pursuant to Section 13 and 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
Dec. 31, 2013
Dec. 31, 2012
Property, Plant and Equipment [Line Items]    
Total, at cost $ 1,006,147 $ 844,652
Less accumulated depreciation (300,035) (249,528)
Subtotal 706,112 595,124
Less assets held for sale (4,101)  
Property and Equipment, net 702,011 595,124
Land [Member]
    
Property, Plant and Equipment [Line Items]    
Total, at cost 194,639 142,730
Building and Improvements [Member]
    
Property, Plant and Equipment [Line Items]    
Total, at cost 569,619 476,846
Office Equipment and Fixtures [Member]
    
Property, Plant and Equipment [Line Items]    
Total, at cost 135,221 115,509
Parts and Service Equipment [Member]
    
Property, Plant and Equipment [Line Items]    
Total, at cost 70,950 62,678
Company Vehicles [Member]
    
Property, Plant and Equipment [Line Items]    
Total, at cost 8,002 7,750
Construction in Progress [Member]
    
Property, Plant and Equipment [Line Items]    
Total, at cost $ 27,716 $ 39,139