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 (Details)

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Business Acquisitions and Dispositions - Revenues and Other Activities Associated with Disposed Dealerships That Remain in Continuing Operations (Details) - Disposed dealerships that remain in continuing operations - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Income (loss) from operations $ (339) $ 739 $ (1,842) $ (5,505)
Gain (loss) on disposal (356) 38,422 46,394 39,613
Lease exit accrual adjustments and charges 0 2 169 (18)
Pre-tax income (loss) (695) 39,163 44,721 34,090
Total revenues $ 0 $ 30,751 $ 26,473 $ 108,777