Annual report [Section 13 and 15(d), not S-K Item 405]

Description of Business and Summary of Significant Accounting Policies - Additional Information (Details)

v3.25.4
Description of Business and Summary of Significant Accounting Policies - Additional Information (Details)
shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2025
USD ($)
Segment
reporting_unit
shares
Dec. 31, 2024
USD ($)
shares
Dec. 31, 2023
USD ($)
shares
Dec. 31, 2025
Store
Dec. 31, 2025
store
Dec. 31, 2025
Dealerships
Dec. 31, 2025
Brand
Dec. 31, 2025
Collision
Dec. 31, 2025
State
Dec. 31, 2025
Description Of Business And Summary Of Significant Accounting Policies [Line Items]                    
Number of operating segments | Segment 3                  
Operating lease liabilities $ 301,800                  
ROU assets 279,100 $ 224,300                
Revenue allowances for commission reserves 67,100 62,900                
Amount recognized for floor plan assistance $ 65,600 64,200 $ 58,700              
Term for funding of finance contracts 10 days                  
Contracts in transit included in receivables, net $ 215,300 246,500                
Receivables, net $ 469,000 495,900                
Number of reporting units | reporting_unit 3                  
Goodwill $ 421,800 358,500 253,800              
Concentrations of credit risk with respect to receivables are limited primarily to receivables from automobile manufacturers 124,700 130,400                
Advertising expense 101,200 84,500 92,200              
Cooperative manufacturer credits advertising expenses $ 37,000 34,700 34,700              
Number of reportable Segment | Segment 3                  
Manufacturer Receivables included in receivables, net $ 124,700 130,400                
Other Receivables included in receivables, net 129,000 119,000                
Goodwill, Impairment Loss 0                  
Property and equipment impairment charges $ 200 $ 3,900 $ 42,700              
Weighted Average Number of Shares Outstanding, Diluted, Adjustment | shares 800 900 900              
Income Tax Disclosure [Abstract]                    
Deferred Tax Liabilities, Goodwill $ 49,300 $ 79,700                
BMW [Domain]                    
Description Of Business And Summary Of Significant Accounting Policies [Line Items]                    
Concentration Risk, Percentage 19.00% 20.00% 20.00%              
Mercedes [Domain]                    
Description Of Business And Summary Of Significant Accounting Policies [Line Items]                    
Concentration Risk, Percentage 11.00% 11.00% 11.00%              
Financial institutions                    
Description Of Business And Summary Of Significant Accounting Policies [Line Items]                    
Concentrations of credit risk with respect to receivables are limited primarily to receivables from financial institutions $ 248,900 $ 279,600                
Franchise assets                    
Description Of Business And Summary Of Significant Accounting Policies [Line Items]                    
Franchise asset impairment charge 165,900                  
Indefinite-Lived Intangible Assets (Excluding Goodwill) 454,100 $ 430,300 $ 417,400              
Continuing operations | Franchise assets                    
Description Of Business And Summary Of Significant Accounting Policies [Line Items]                    
Franchise asset impairment charge 116,400                  
Dealership                    
Description Of Business And Summary Of Significant Accounting Policies [Line Items]                    
Percentage of dealership that is accounted for under the equity method                   50.00%
Franchised Dealerships [Member]                    
Description Of Business And Summary Of Significant Accounting Policies [Line Items]                    
Number of Stores | Store       111            
Number of new vehicle dealerships | Dealerships           134        
Number of states | State                 18  
Number of different brands of cars and light trucks | Brand             24      
Number of collision repair centers | Collision               16    
Finite-Lived Intangible Assets, Net 394,500                  
Echo Park [Member]                    
Description Of Business And Summary Of Significant Accounting Policies [Line Items]                    
Number of Stores | Store       18            
Number of states | store         10          
Powersports Dealerships                    
Description Of Business And Summary Of Significant Accounting Policies [Line Items]                    
Number of Stores       14 14          
Finite-Lived Intangible Assets, Net $ 27,300                  
Number of Powersports Franchises Operated by Entity | Store       41            
Number of Authorized Retail Outlets | store         3          
Number of Full-Service Stores | Store       11            
Powrsports                    
Description Of Business And Summary Of Significant Accounting Policies [Line Items]                    
Number of states | store         3