Revenue Recognition - Additional Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Disaggregation Of Revenue [Line Items]
Reserve for chargebacks	$ 8.9	$ 9.6
Cumulative profit sharing payment recognized	$ 22.0	17.9
Revenue, practical expedient, incremental cost of obtaining contract	true
Accrued Expenses
Disaggregation Of Revenue [Line Items]
Reserve for chargebacks	$ 4.7	5.5
Residual Interest, 2022-1 Securitization
Disaggregation Of Revenue [Line Items]
Percentage of servicing fees earned on outstanding principal balance of finance receivable	4.00%
Residual Interest, 2022-2 Securitization
Disaggregation Of Revenue [Line Items]
Percentage of servicing fees earned on outstanding principal balance of finance receivable	3.50%
Other Long-term Liabilities
Disaggregation Of Revenue [Line Items]
Reserve for chargebacks	$ 4.2	4.1
Prepaid Expenses and Other Current Assets
Disaggregation Of Revenue [Line Items]
Cumulative profit sharing payment recognized	1.3	0.9
Other Assets
Disaggregation Of Revenue [Line Items]
Cumulative profit sharing payment recognized	$ 20.7	$ 17.0