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Business Acquisitions and Dispositions - Additional Information (Details) | 3 Months Ended | 6 Months Ended
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Jun. 30, 2024 USD ($) | Mar. 31, 2024 USD ($) | Jun. 30, 2023 USD ($) | Jun. 30, 2024 USD ($) retail_Units | Jun. 30, 2023 USD ($) | Jun. 30, 2023 retail_Units | Jun. 30, 2023 Business
Mid-line import franchise |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Number of franchises disposed | retail_Units |  |  |  | 1 |  |  |
Net cash generated from disposition |  |  |  |  | $ 52,300,000 |  |
Luxury Dealership [Domain] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Number of franchises disposed | retail_Units |  |  |  | 2 |  |  |
Number of franchises disposed |  |  |  |  |  | 1 | 1
Net cash generated from disposition |  |  |  | $ 3,400,000 |  |  |
Proceeds from sales of dealerships |  |  |  | 3,400,000 | 52,300,000 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other | $ 100,000 |  |  | 100,000 |  |  |
Payments to Acquire Businesses, Gross |  |  |  | 75,100,000 |  |  |
PY Acq GW Allocations Fdealer |  | $ 9,800,000 |  | 0 |  |  |
PY Acq GW Allocations Powersports |  | $ 2,900,000 |  | 0 |  |  |
number of powersport stores with GW Adjustment |  |  |  |  |  |  |
Gain on Franchise Disposal | (600,000) |  | $ 20,900,000 |  | 20,900,000 |  |
Excluded non-recurring compensation-related charges | 11,200,000 |  |  |  | 4,200,000 |  |
GainLossOnExitOfLeasedDealerships | (3,000,000.0) |  |  |  | 400,000 |  |
Impairment charges | 1,400,000 |  | 62,600,000 | (2,400,000) | 62,600,000 |  |
Excluded storm-related physical damage and legal costs | 3,600,000 |  | 1,900,000 | 3,600,000 | 1,900,000 |  |
Excluded non-recurring compensation-related charges | 11,200,000 |  |  |  | 4,200,000 |  |
Excluded storm-related physical damage and legal costs | 3,600,000 |  | 1,900,000 | 3,600,000 | 1,900,000 |  |
Gain on Franchise Disposal | (600,000) |  | 20,900,000 |  | 20,900,000 |  |
Impairment charges | 1,400,000 |  | 62,600,000 | (2,400,000) | 62,600,000 |  |
GainLossOnExitOfLeasedDealerships | (3,000,000.0) |  |  |  | 400,000 |  |
EchoPark Segment [Member] |  |  |  |  |  |  |
number of powersport stores with GW Adjustment |  |  |  |  |  |  |
GainLossOnExitOfLeasedDealerships |  |  |  | (3,000,000.0) |  |  |
GainLossOnExitOfLeasedDealerships |  |  |  | (3,000,000.0) |  |  |
Powersports Segment |  |  |  |  |  |  |
number of powersport stores with GW Adjustment |  |  |  |  |  |  |
Impairment charges | 0 |  | 0 | 0 | 0 |  |
Impairment charges | 0 |  | 0 | 0 | 0 |  |
EchoPark Segment [Member] |  |  |  |  |  |  |
number of powersport stores with GW Adjustment |  |  |  |  |  |  |
GainLossOnExitOfLeasedDealerships |  |  | 400,000 |  |  |  |
Impairment charges |  |  |  | 1,400,000 |  |  |
Impairment charges |  |  |  | 1,400,000 |  |  |
GainLossOnExitOfLeasedDealerships |  |  | 400,000 |  |  |  |
EchoPark Segment [Member] | Inventories |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Restructuring Costs |  |  | $ 10,000,000.0 |  | $ 10,000,000.0 |  |
Stand-alone pre-owned vehicle business |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory | 11,100,000 |  |  | 11,100,000 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment | 700,000 |  |  | 700,000 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | 22,600,000 |  |  | 22,600,000 |  |  |
Powersports Segment |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Number of acquired franchises | retail_Units |  |  |  |  |  | 5 |
Number of Powersports Stores Acquired | retail_Units |  |  |  |  |  | 1 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Land | 29,000,000 |  |  | 29,000,000 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | $ (300,000) |  |  | $ (300,000) |  |  |

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