Quarterly report [Sections 13 or 15(d)]

Summary of Significant Accounting Policies - Cumulative Effect of Adjustments for Adoption of ASC 606 (Details)

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Summary of Significant Accounting Policies - Cumulative Effect of Adjustments for Adoption of ASC 606 (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Revenues:      
Revenues $ 3,688,500 $ 3,651,300  
Cost of Sales:      
Cost of Sales (3,089,700) (3,084,900)  
Operating income (loss) 132,700 145,000  
Assets:      
Receivables, net 415,400   $ 469,000
Liabilities:      
Other accrued liabilities 431,100   409,100
Stockholders' Equity:      
Retained Earnings (Accumulated Deficit) 1,529,400   1,481,100
Parts, service and collision repair      
Revenues:      
Revenues 516,600 474,400  
Cost of Sales:      
Cost of Sales (252,000) (233,800)  
Finance, insurance and other, net      
Revenues:      
Revenues 202,400 $ 190,800  
Assets:      
Contract assets $ 5,800   $ 7,000