Annual report pursuant to Section 13 and 15(d)

Segment Information - Summary of Reportable Operating Segment (Detail)

v3.8.0.1
Segment Information - Summary of Reportable Operating Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Segment Reporting Information [Line Items]                        
Total consolidated revenues $ 2,667,939 $ 2,505,701 $ 2,405,746 $ 2,287,822 $ 2,556,913 $ 2,557,928 $ 2,382,312 $ 2,234,626 $ 9,867,208 $ 9,731,779 $ 9,624,299  
Total segment income (loss)                 175,170 205,193 195,967  
Interest expense, other, net                 (52,524) (50,106) (50,910)  
Other income (expense), net                 (14,522) 125 99  
Income (loss) from continuing operations before taxes                 108,124 155,212 145,156  
Total floor plan interest expense                 36,395 27,716 21,326  
Total depreciation and amortization                 88,944 77,446 68,799  
Total capital expenditures                 234,245 206,232 173,249  
Total assets 3,818,518       3,639,336       3,818,518 3,639,336    
Cash and cash equivalents 6,352       3,108       6,352 3,108 3,625 $ 4,182
Goodwill, Net 525,780       472,437       525,780 472,437 471,493  
Other Intangible Assets, net 74,589       80,233       74,589 80,233    
Other Corporate and Other Assets 1,080,961       859,656       1,080,961 859,656    
Franchised Dealerships Segment [Member]                        
Segment Reporting Information [Line Items]                        
Total consolidated revenues                 9,612,899 9,590,752 9,547,236  
Total segment income (loss)                 196,897 218,769 213,224  
Total floor plan interest expense                 35,030 26,631 20,727  
Total depreciation and amortization                 83,741 73,591 65,766  
Total capital expenditures                 195,220 166,405 148,593  
Total assets 1,930,336       2,079,297       1,930,336 2,079,297    
Goodwill, Net 465,800               465,800      
Pre-Owned Stores Segment [Member]                        
Segment Reporting Information [Line Items]                        
Total consolidated revenues                 254,309 141,027 77,063  
Total segment income (loss)                 (21,727) (13,576) (17,257)  
Total floor plan interest expense                 1,365 1,085 599  
Total depreciation and amortization                 5,203 3,855 3,033  
Total capital expenditures                 39,025 39,827 $ 24,656  
Total assets 200,500       $ 144,605       200,500 $ 144,605    
Goodwill, Net $ 60,000               $ 60,000