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Accounts Receivable and Contract Assets (Additional Information) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Period that contracts in transit are outstanding 10 days  
Threshold period for interest to bear on receivables 60 days  
Allowance for doubtful accounts $ 8.4 $ 5.9
Auto loan receivables    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Receivables, 60 days or less past due, percent 99.00%  
Receivables, 60 days or less past due, non-accrual status, percent 1.00%  
Allowance for doubtful accounts $ 12.4