Finance Receivables, Credit Quality Information, and Allowance for Credit Losses - Summary of TDR Finance Receivables that Subsequently Defaulted (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | Loan	466
TDR Net Finance Receivables | $	$ 1,696	[1]
Small Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | Loan	254
TDR Net Finance Receivables | $	$ 478	[1]
Large Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | Loan	210
TDR Net Finance Receivables | $	$ 1,212	[1]
Retail Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | Loan	2
TDR Net Finance Receivables | $	$ 6	[1]

[1] Only includes defaults occurring within 12 months of a loan being designated as a TDR. Represents the corresponding balance of TDR net finance receivables at the end of the month in which they defaulted.