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Business Combinations (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) retail_Units | Sep. 30, 2023 USD ($) | Sep. 30, 2023 retail_Units | Sep. 30, 2023 Business
Business Combinations [Abstract] |  |  |  |  |  |
Number of franchises disposed |  |  |  |  | 1 | 1
Proceeds from sales of dealerships |  |  | $ 8,200 | $ 52,200 |  |
Asset Acquisition [Line Items] |  |  |  |  |  |
Number of franchises disposed |  |  |  |  | 1 | 1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other | $ 100 |  | 100 |  |  |
Impairment charges | 0 | $ 0 | (2,400) | 62,600 |  |
Payments to Acquire Businesses, Gross |  |  | 75,100 |  |  |
Purchase of businesses, net of cash acquired |  |  | 0 | 75,100 |  |
EchoPark Segment [Member] |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |
Impairment charges |  |  | $ 1,400 |  |  |
Inventories | EchoPark Segment [Member] |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |
Restructuring Costs |  |  |  | $ 10,000 |  |
Mid-line import franchise |  |  |  |  |  |
Business Combinations [Abstract] |  |  |  |  |  |
Number of franchises disposed | retail_Units |  |  | 2 |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |
Number of franchises disposed | retail_Units |  |  | 2 |  |  |
Northwest Motorsport Segment [Abstract] |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |
NumberofPreownedStoresDisposed | retail_Units |  |  | 7 |  |  |
Luxury Dealership [Domain] |  |  |  |  |  |
Business Combinations [Abstract] |  |  |  |  |  |
Number of franchises disposed | retail_Units |  |  | 2 |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |
Number of franchises disposed | retail_Units |  |  | 2 |  |  |
Stand-alone pre-owned vehicle business |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory | 11,100 |  | $ 11,100 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | 22,600 |  | 22,600 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment | 700 |  | 700 |  |  |
Goodwill, Acquired During Period |  |  | 11,900 |  |  |
Powersports Segment |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |
Number of acquired franchises | retail_Units |  |  |  |  | 5 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Land | 29,000 |  | 29,000 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | $ (300) |  | $ (300) |  |  |
Number of Powersports Stores Acquired | retail_Units |  |  |  |  | 1 |

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