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v3.21.2

Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Mar. 31, 2019 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, Tax Settlement, State and Local, Amount |  | $ 3,400,000 |  |  | $ 200,000 |
Percentage of dealership that is accounted for under the equity method | 50.00% |  |  | 50.00% |  |
Effective tax rate from continuing operations | 24.50% | 17.20% |  | 25.00% | 18.30% |
Tax expense for uncertain tax positions |  |  |  |  | $ 1,400,000 |
Discrete benefit related to vested or exercised stock compensation |  | $ 300,000 |  | $ 2,800,000 | 200,000 |
Discrete charge related to non-deductible asset impairment charge | $ 1,300,000 |  |  |  |  |
Income benefit | (37,030,000) | (6,437,000) |  | (55,893,000) | 37,680,000 |
Impairment charges | $ 0 | 833,000 | $ 800,000 | $ 0 | 268,833,000 |
Goodwill, Impairment Loss |  |  |  |  | 268,000,000.0 |
Income Tax Benefit Goodwill Impairment |  |  |  |  | 55,800,000 |
Effective Income Tax Rate Reconciliation, Tax Settlement, State and Local, Amount |  | $ 3,400,000 |  |  | $ 200,000 |
Dealership |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Percentage of dealership that is accounted for under the equity method | 50.00% |  |  | 50.00% |  |
ASU 2014-09 | Finance, insurance and other, net |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Contract assets | $ 22,000,000.0 |  |  | $ 22,000,000.0 |  | $ 21,700,000

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