Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets - Additional Information (Details)

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Goodwill and Intangible Assets - Additional Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]              
Goodwill - Franchise Segment $ 229,700     $ 229,700   $ 229,800 $ 221,800
Goodwill - Preowned Segment 0     0   0 0
Goodwill - Powersports Segment 24,000     24,000   24,000 9,200
GW Accm Amort Fdealer           1,100,000  
GW Amm Amort Preowned           202,900  
Finite-Lived Intangible Assets [Line Items]              
Impairment charges 1,400   $ 62,600 (2,400) $ 62,600    
Goodwill [Line Items]              
Goodwill - Preowned Segment 0     0   0 0
Goodwill and Intangible Asset Impairment   $ (1,800)   0      
Goodwill 253,700     253,700   253,800 231,000
Goodwill and Intangible Assets Acquired   11,900   0      
Goodwill - Franchise Segment 229,700     229,700   229,800 221,800
Goodwill - Powersports Segment 24,000     24,000   24,000 9,200
PY Acq GW Allocations   12,700   0      
PY Acq GW Allocations Fdealer   9,800   0      
PY Acq GW Allocations Preowned   0   0      
PY Acq GW Allocations Powersports   2,900   0      
Goodwill and Intangible Assets Acquired Fdealer   0   0      
Goodwill and Intangible Assets Acquired Preowned   0   0      
Goodwill and Intangible Assets Acquired Powersports   11,900   0      
Intangible Assets - Reductions from Dispositions Franchised       (100)      
Intangible Assets - Reductions from dispositions Total       (100)      
GW Asset Impairment Fdealer   (1,800)   0      
GW Asset Impairment Preowned   0   0      
GW Asset Impairment Powersports   0   0      
Indefinite-Lived Intangible Assets [Line Items]              
Franchise Assets - Franchised 371,700     371,700   371,700 371,700
Intangible Assets Preowned 0     0   0 1,900
Intangible Assets - Powersports 45,700     45,700   45,700 23,100
Franchise Assets - Assets Acquired Franchised   0   0      
Intangible Assets - Assets Acquired Preowned   0   0      
Intangible Assets - Assets Acquired Powersports   22,600   0      
Indefinite-Lived Intangible Assets Acquired   22,600   0      
Franchise Assets - reductions from disp fdealer   0   0      
Intangible Assets - reduction from dispositions preowned   (1,900)   0      
Intangible Assets - Reductions from dispositions powersports   0   0      
Indefinite-Lived Intangible Assets, Written off Related to Sale of Business Unit   1,900   0      
Goodwill and Intangible Asset Impairment   $ (1,800)   0      
Other Intangible Assets, net 417,400     417,400   $ 417,400 $ 396,700
EchoPark Segment [Member]              
Finite-Lived Intangible Assets [Line Items]              
Impairment charges       1,400      
Powersports Segment              
Finite-Lived Intangible Assets [Line Items]              
Impairment charges $ 0   $ 0 $ 0 $ 0