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Business Combinations (Details) $ in Thousands | 3 Months Ended
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Mar. 31, 2022 USD ($) retail_Units Business | Mar. 31, 2021 Business
Business Combinations [Abstract] |  |
Number of franchises disposed | 0 | 0
RFJ |  |
Asset Acquisition [Line Items] |  |
Business acquisition, consideration amount | $ 964,900 |
Business acquisition, consideration amount | $ 964,900 |
EchoPark Segment [Member] |  |
Asset Acquisition [Line Items] |  |
Number of acquired franchises | Business | 0 |
Stand-alone pre-owned vehicle business |  |
Asset Acquisition [Line Items] |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory | $ 4,900 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | 6,400 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment | 100 |
Goodwill, Acquired During Period | 1,300 |
Business acquisition, consideration amount | 28,400 |
Business acquisition, consideration amount | $ 28,400 |
Franchised [Member] |  |
Asset Acquisition [Line Items] |  |
Number of acquired franchises | Business | 2 |
Franchised Dealerships Acquired |  |
Asset Acquisition [Line Items] |  |
Business acquisition, consideration amount | $ 13,700 |
Business acquisition, consideration amount | $ 13,700 |

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