Annual report pursuant to Section 13 and 15(d)

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

v3.8.0.1
Property and Equipment - Components of Property and Equipment, Net (Detail) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Property Plant And Equipment [Line Items]    
Total, at cost $ 1,677,749 $ 1,464,795
Less accumulated depreciation (527,379) (450,184)
Subtotal 1,150,370 1,014,611
Less assets held for sale (3,489) (4,231)
Property and equipment, net 1,146,881 1,010,380
Land [Member]    
Property Plant And Equipment [Line Items]    
Total, at cost 370,828 306,457
Building and Improvements [Member]    
Property Plant And Equipment [Line Items]    
Total, at cost 893,768 777,766
Software and Computer Equipment [Member]    
Property Plant And Equipment [Line Items]    
Total, at cost 147,812 128,366
Office Equipment and Fixtures [Member]    
Property Plant And Equipment [Line Items]    
Total, at cost 96,066 86,216
Parts and Service Equipment [Member]    
Property Plant And Equipment [Line Items]    
Total, at cost 105,123 93,901
Company Vehicles [Member]    
Property Plant And Equipment [Line Items]    
Total, at cost 9,723 9,107
Construction in Progress [Member]    
Property Plant And Equipment [Line Items]    
Total, at cost $ 54,429 $ 62,982