Finance Receivables, Credit Quality Information, and Allowance for Credit Losses - Summary of Contractual Delinquencies of Loans that were Modified to Borrowers Experiencing Financial Difficulty (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable Recorded Investment [Line Items]
Contractual delinquencies of loans	$ 71,631	$ 60,061
Contractual Delinquencies of Loans that were Modified to Borrowers [Member]
Financing Receivable Recorded Investment [Line Items]
Contractual delinquencies of loans	10,403
Small Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Contractual delinquencies of loans	27,983	20,810
Small Loans [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member]
Financing Receivable Recorded Investment [Line Items]
Contractual delinquencies of loans	2,669
Large Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Contractual delinquencies of loans	43,045	$ 39,039
Large Loans [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member]
Financing Receivable Recorded Investment [Line Items]
Contractual delinquencies of loans	7,734
Financial Asset, Not Past Due [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member]
Financing Receivable Recorded Investment [Line Items]
Contractual delinquencies of loans	9,678
Financial Asset, Not Past Due [Member] | Small Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Contractual delinquencies of loans	2,354
Financial Asset, Not Past Due [Member] | Large Loans [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member]
Financing Receivable Recorded Investment [Line Items]
Contractual delinquencies of loans	7,324
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member]
Financing Receivable Recorded Investment [Line Items]
Contractual delinquencies of loans	51
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Small Loans [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member]
Financing Receivable Recorded Investment [Line Items]
Contractual delinquencies of loans	34
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Large Loans [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member]
Financing Receivable Recorded Investment [Line Items]
Contractual delinquencies of loans	17
Financing Receivables, 30 - 89 Days Past Due [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member]
Financing Receivable Recorded Investment [Line Items]
Contractual delinquencies of loans	674
Financing Receivables, 30 - 89 Days Past Due [Member] | Small Loans [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member]
Financing Receivable Recorded Investment [Line Items]
Contractual delinquencies of loans	281
Financing Receivables, 30 - 89 Days Past Due [Member] | Large Loans [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member]
Financing Receivable Recorded Investment [Line Items]
Contractual delinquencies of loans	$ 393