Quarterly report pursuant to Section 13 or 15(d)

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

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Business Acquisitions and Dispositions - Revenues and Other Activities Associated with Disposed Dealerships That Remain in Continuing Operations (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Business Combinations [Abstract]        
Income (loss) from operations $ (16) $ (241) $ (43) $ (273)
Gain (loss) on disposal   (11) (24) (58)
Pre-tax income (loss) $ (16) $ (252) $ (67) $ (331)