Annual report pursuant to Section 13 and 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) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Lease exit accrual adjustments and charges $ (2,600) $ (4,800)      
Disposed dealerships that remain in continuing operations          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Income (loss) from operations before taxes and items below     $ 3,154 $ (4,313) $ (736)
Gain (loss) on disposal of dealerships (1)     76,461 39,307 9,974
Lease exit accrual adjustments and charges     170 210 (1,207)
Impairment charges     0 (4,180) (318)
Income (loss) before taxes     79,785 31,024 7,713
Total revenues     $ 307,849 $ 783,275 $ 1,140,514