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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 | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Income (loss) from operations before taxes and items below | $ (2,200) | $ (2,600) | $ 2,700
Gain (loss) on disposal of dealerships (1) | 2,300 | 3,100 | 74,800
Discontinued Operation Lease Exit Accrual Adjustments And Charges | 400 | 0 | 200
Income (loss) before taxes | 500 | 500 | 77,700
Total revenues | $ 25,500 | $ 52,100 | $ 419,500

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