Quarterly report [Sections 13 or 15(d)]

Goodwill and Intangible Assets - Additional Information (Details)

v3.25.3
Goodwill and Intangible Assets - Additional Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Jun. 30, 2025
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]              
Goodwill - Franchise Segment $ 595,500     $ 595,500   $ 331,200 $ 229,800
Goodwill - Preowned Segment 0     0   0 0
Goodwill - Powersports Segment 27,800     27,800   27,300 24,000
GW Accm Amort Fdealer           1,100,000  
GW Amm Amort Preowned           202,900  
Finite-Lived Intangible Assets [Line Items]              
Impairment charges 0 $ 0   (173,800) $ (2,400)    
Goodwill [Line Items]              
Goodwill - Preowned Segment 0     0   0 0
Goodwill and Intangible Asset Impairment     $ (200)        
Goodwill 623,300     623,300   358,500 253,800
Goodwill and Intangible Assets Acquired     11,400 263,900      
Goodwill - Franchise Segment 595,500     595,500   331,200 229,800
Goodwill - Powersports Segment 27,800     27,800   27,300 24,000
PY Acq GW Allocations     93,500 1,600      
PY Acq GW Allocations Fdealer       1,100   93,500  
PY Acq GW Allocations Preowned     0 0      
PY Acq GW Allocations Powersports     0 500      
Goodwill and Intangible Assets Acquired Fdealer     8,100 263,900      
Goodwill and Intangible Assets Acquired Preowned     0 0      
Goodwill and Intangible Assets Acquired Powersports     3,300 0      
Intangible Assets - Reductions from Dispositions Franchised       (700)      
Intangible Assets - Reductions from dispositions Total       (700)      
GW Asset Impairment Fdealer     (200)        
GW Asset Impairment Preowned     0 0      
GW Asset Impairment Powersports     0 0      
Indefinite-Lived Intangible Assets [Line Items]              
Franchise Assets - Franchised 211,600     211,600   382,600 371,700
Intangible Assets Preowned 0     0   0 0
Intangible Assets - Powersports 40,500     40,500   47,700 45,700
Franchise Assets - Assets Acquired Franchised     10,900        
Intangible Assets - Assets Acquired Preowned     0        
Intangible Assets - Assets Acquired Powersports     2,000        
Indefinite-Lived Intangible Assets Acquired     12,900        
Franchise Assets - reductions from disp fdealer       (5,100)      
Intangible Assets - reduction from dispositions preowned       0      
Intangible Assets - Reductions from dispositions powersports       (700)      
Indefinite-Lived Intangible Assets, Written off Related to Sale of Business Unit       5,800      
Franchise Assets Reductions from impairment fdealer       (165,900)      
Intangible assets - Reductions from impairment preowned       0      
Intangible assets - Reductions from impairment powersports       (6,500)      
Goodwill and Intangible Asset Impairment     $ (200)        
Other Intangible Assets, net $ 252,100     252,100   $ 430,300 $ 417,400
Reductions from impairment, total       (172,400)      
EchoPark Segment [Member]              
Finite-Lived Intangible Assets [Line Items]              
Impairment charges       200 $ 1,400    
Powersports Segment              
Finite-Lived Intangible Assets [Line Items]              
Impairment charges       $ 7,200