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 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Income (loss) from operations $ (200) $ (301) $ (2,701) $ (6,146)
Gain (loss) on disposal (823) (88) 45,570 39,149
Lease exit accrual adjustments and charges 0 (16) 169 (784)
Pre-tax income (loss) (1,023) (405) 43,038 32,219
Total revenues $ 2,455 $ 100,242 $ 54,682 $ 386,160