Annual report pursuant to Section 13 and 15(d)

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

v3.25.0.1
Description of Business and Summary of Significant Accounting Policies - Additional Information (Details)
shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2024
USD ($)
Segment
reporting_unit
shares
Dec. 31, 2023
USD ($)
shares
Dec. 31, 2022
USD ($)
shares
Dec. 31, 2024
Store
Dec. 31, 2024
store
Dec. 31, 2024
Dealerships
Dec. 31, 2024
Brand
Dec. 31, 2024
Collision
Dec. 31, 2024
State
Dec. 31, 2024
Description Of Business And Summary Of Significant Accounting Policies [Line Items]                    
Number of operating segments | Segment 3                  
Number of new vehicle dealerships | Dealerships           133        
Number of states | State                 18  
Number of different brands of cars and light trucks | Brand             25      
Number of collision repair centers | Collision               16    
Operating lease liabilities $ 245,700                  
ROU assets 224,300 $ 222,600                
Revenue allowances for commission reserves 62,900 57,500                
Amount recognized for floor plan assistance $ 64,200 58,700 $ 51,500              
Term for funding of finance contracts 10 days                  
Contracts in transit included in receivables, net $ 246,500 275,600                
Receivables, net $ 495,900 528,100                
Number of reporting units | reporting_unit 3                  
Goodwill $ 358,500 253,800 231,000              
Concentrations of credit risk with respect to receivables are limited primarily to receivables from automobile manufacturers 130,400 105,300                
Advertising expense 84,500 92,200 95,400              
Cooperative manufacturer credits advertising expenses $ 34,700 34,700 30,800              
Number of reportable Segment | Segment 3                  
Manufacturer Receivables included in receivables, net $ 130,400 105,300                
Other Receivables included in receivables, net 119,000 147,200                
Goodwill, Impairment Loss 0   202,900              
Property and equipment impairment charges $ 3,900 $ 42,700 $ 1,100              
Weighted Average Number of Shares Outstanding, Diluted, Adjustment | shares 900 900 1,000              
Number of retail stores | store         4          
Income Tax Disclosure [Abstract]                    
Indefinite-lived Intangible Assets, Purchase Accounting Adjustments $ 93,500                  
Deferred Income Taxes and Tax Credits 31,000                  
Deferred Tax Liabilities, Goodwill 79,700 $ 13,200                
Deferred Tax Liabilities, Goodwill $ 62,500                  
BMW [Domain]                    
Description Of Business And Summary Of Significant Accounting Policies [Line Items]                    
Concentration Risk, Percentage 20.00%                  
Mercedes [Domain]                    
Description Of Business And Summary Of Significant Accounting Policies [Line Items]                    
Concentration Risk, Percentage 11.00% 11.00% 10.00%              
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 $ 279,600 $ 317,900                
Franchise assets                    
Description Of Business And Summary Of Significant Accounting Policies [Line Items]                    
Franchise asset impairment charge 0                  
Indefinite-Lived Intangible Assets (Excluding Goodwill) 430,300 $ 417,400 $ 396,700              
Continuing operations | Franchise assets                    
Description Of Business And Summary Of Significant Accounting Policies [Line Items]                    
Franchise asset impairment charge 116,400   $ 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       108            
Finite-Lived Intangible Assets, Net 331,200                  
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       11 15          
Finite-Lived Intangible Assets, Net $ 27,300                  
Powrsports                    
Description Of Business And Summary Of Significant Accounting Policies [Line Items]                    
Number of states | store         3