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Business Acquisitions and Dispositions - Additional Information (Details) | 3 Months Ended
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Mar. 31, 2022 USD ($) retail_Units Business | Mar. 31, 2021 USD ($) Business
Business Acquisition [Line Items] |  |
Number of franchises disposed | 0 | 0
Net cash generated from disposition | $ 0 |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory | 4,300,000 |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles | 1,100,000 |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred | 14,700,000 |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Assets | 3,400,000 |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities | $ 5,900,000 |
Mid-line import franchise |  |
Business Acquisition [Line Items] |  |
Net cash generated from disposition |  | $ 0
EchoPark Segment [Member] |  |
Business Combinations [Abstract] |  |
Number of acquired franchises | Business | 0 |
Business Acquisition [Line Items] |  |
Number of acquired franchises | Business | 0 |
Stand-alone pre-owned vehicle business |  |
Business Acquisition [Line Items] |  |
Business acquisition, consideration amount | $ 28,400,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory | 4,900,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment | 100,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | 6,400,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other | 1,100,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other | $ (100,000) |
Franchised [Member] |  |
Business Combinations [Abstract] |  |
Number of acquired franchises | Business | 2 |
Business Acquisition [Line Items] |  |
Number of acquired franchises | Business | 2 |

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