Quarterly report [Sections 13 or 15(d)]

Goodwill and Intangible Assets - Additional Information (Details)

v3.26.1
Goodwill and Intangible Assets - Additional Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Intangible Asset, Goodwill and Other [Abstract]          
Goodwill - Franchise Segment $ 391,500     $ 394,500 $ 331,200
Goodwill - Preowned Segment 0     0 0
Goodwill - Powersports Segment 27,300     27,300 27,300
GW Accm Amort Fdealer       1,100,000  
GW Amm Amort Preowned       202,900  
Intangible Asset, Finite-Lived [Line Items]          
Impairment charges (400) $ (1,400)      
Goodwill [Line Items]          
Goodwill - Preowned Segment 0     0 0
Intangible Asset, Including Goodwill, Impairment Loss       (700)  
Goodwill 418,800     421,800 358,500
Goodwill and Intangible Assets Acquired       64,200  
Goodwill - Franchise Segment 391,500     394,500 331,200
Goodwill - Powersports Segment 27,300     27,300 27,300
PY Acq GW Allocations       (200)  
PY Acq GW Allocations Fdealer     $ (200)    
PY Acq GW Allocations Preowned       0  
PY Acq GW Allocations Powersports       0  
Goodwill and Intangible Assets Acquired Fdealer       64,200  
Goodwill and Intangible Assets Acquired Preowned       0  
Goodwill and Intangible Assets Acquired Powersports       0  
Intangible Assets - Reductions from Dispositions Franchised (3,000)        
Intangible Assets - Reductions from dispositions Total (3,000)        
GW Asset Impairment Fdealer       (700)  
GW Asset Impairment Preowned 0     0  
GW Asset Impairment Powersports 0     0  
Intangible Asset, Indefinite-Lived [Line Items]          
Franchise Assets - Franchised 396,400     413,600 382,600
Intangible Assets Preowned 0     0 0
Intangible Assets - Powersports 40,500     40,500 47,700
Franchise Assets - Assets Acquired Franchised       202,000  
Intangible Assets - Assets Acquired Preowned       0  
Intangible Assets - Assets Acquired Powersports       0  
Intangible Asset, Indefinite-Lived, Acquired       202,000  
Franchise Assets - reductions from disp fdealer (17,200)     (5,100)  
Intangible Assets - reduction from dispositions preowned 0     0  
Intangible Assets - Reductions from dispositions powersports 0     (700)  
Intangible Asset, Indefinite-Lived, Divestiture 17,200     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)  
Intangible Asset, Including Goodwill, Impairment Loss       (700)  
Other Intangible Assets, net $ 436,900     454,100 $ 430,300
Reductions from impairment, total       $ (172,400)  
EchoPark Segment [Member]          
Intangible Asset, Finite-Lived [Line Items]          
Impairment charges   $ 200