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Finance Receivables, Credit Quality Information, and Allowance for Credit Losses - Summary of Modification Made to Borrowers Experiencing Financial Difficulty (Details)
$ in Thousands
Mar. 31, 2023
USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Amortized cost basis $ 10,407
% of Net finance receivables 0.60%
Principal Forgiveness [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Amortized cost basis $ 27
Deferrals [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Amortized cost basis $ 4,786
% of Net finance receivables 0.30%
Interest Rate Reduction and Term Extension [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Amortized cost basis $ 5,594
% of Net finance receivables 0.30%
Small Loans [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Amortized cost basis $ 2,668
% of Net finance receivables 0.60%
Small Loans [Member] | Principal Forgiveness [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Amortized cost basis $ 3
Small Loans [Member] | Deferrals [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Amortized cost basis $ 1,707
% of Net finance receivables 0.40%
Small Loans [Member] | Interest Rate Reduction and Term Extension [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Amortized cost basis $ 958
% of Net finance receivables 0.20%
Large Loans [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Amortized cost basis $ 7,739
% of Net finance receivables 0.60%
Large Loans [Member] | Principal Forgiveness [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Amortized cost basis $ 24
Large Loans [Member] | Deferrals [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Amortized cost basis $ 3,079
% of Net finance receivables 0.30%
Large Loans [Member] | Interest Rate Reduction and Term Extension [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Amortized cost basis $ 4,636
% of Net finance receivables 0.40%