Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Additional Information (Details)

v3.21.2
Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]          
Effective Income Tax Rate Reconciliation, Tax Settlement, State and Local, Amount $ 400,000 $ 100,000 $ 500,000 $ 200,000  
Discrete charge for non-deductible disposition       $ 100,000  
Percentage of dealership that is accounted for under the equity method 50.00%   50.00%    
Effective tax rate from continuing operations 24.60% 25.60% 24.90% 13.60%  
Tax expense for uncertain tax positions       $ 1,400,000  
Discrete benefit related to vested or exercised stock compensation     $ 3,200,000 200,000  
Discrete charge related to non-deductible asset impairment charge $ 400,000        
Income benefit (27,559,000) $ (20,685,000) (83,452,000) 16,995,000  
Impairment charges 0 26,000 0 268,859,000  
Goodwill, Impairment Loss       268,000,000  
Income Tax Benefit Goodwill Impairment       55,800,000  
Effective Income Tax Rate Reconciliation, Tax Settlement, State and Local, Amount $ 400,000 $ 100,000 $ 500,000 $ 200,000  
Dealership          
Schedule of Equity Method Investments [Line Items]          
Percentage of dealership that is accounted for under the equity method 50.00%   50.00%    
ASU 2014-09 | Finance, insurance and other, net          
Schedule of Equity Method Investments [Line Items]          
Contract assets $ 27,500,000   $ 27,500,000   $ 21,700,000