Quarterly report pursuant to Section 13 or 15(d)

Business Acquisitions and Dispositions - Revenues and Other Activities Associated with Disposed Dealerships That Remain in Continued Operations (Detail)

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Business Acquisitions and Dispositions - Revenues and Other Activities Associated with Disposed Dealerships That Remain in Continued Operations (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Business Combinations [Abstract]        
Income (loss) from operations $ (41) $ (1,145) $ (313) $ (3,701)
Gain (loss) on disposal 29 (542) (30) 414
Property and equipment impairment charges       (10,096)
Pre-tax income (loss) (12) (1,687) (343) (13,383)
Total revenues $ 11 $ 25,707 $ 10 $ 83,275