Quarterly report pursuant to Section 13 or 15(d)

Segment Information - Summary of Reportable Operating Segment (Detail)

v3.7.0.1
Segment Information - Summary of Reportable Operating Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Segment Reporting Information [Line Items]        
Total consolidated revenues $ 2,405,746 $ 2,382,312 $ 4,693,568 $ 4,616,939
Total segment income (loss) 33,027 50,355 61,089 86,224
Interest expense, other, net (12,764) (12,205) (26,172) (24,544)
Other income (expense), net 7 6 (14,495) 110
Income (loss) from continuing operations before taxes 20,270 38,156 20,422 61,790
Franchised Dealerships [Member]        
Segment Reporting Information [Line Items]        
Total consolidated revenues 2,356,692 2,352,840 4,602,717 4,563,425
Total segment income (loss) 40,544 53,561 74,013 92,854
Echo Park [Member]        
Segment Reporting Information [Line Items]        
Total consolidated revenues 49,054 29,472 90,851 53,514
Total segment income (loss) $ (7,517) $ (3,206) $ (12,924) $ (6,630)