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Finance Receivables, Credit Quality Information, and Allowance for Credit Losses - Summary of Contractual Delinquencies of Loans that were Modified to Borrowers Experiencing Financial Difficulty (Parenthetical) (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2026 | Mar. 31, 2025
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Modified finance receivables charged off | $ 71,161 | $ 61,709
Small Loans [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Modified finance receivables charged off | 29,219 | 25,954
Small Loans [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Modified finance receivables charged off | 1,000 | 400
Large Loans [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Modified finance receivables charged off | 41,942 | 35,755
Large Loans [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Modified finance receivables charged off | $ 3,300 | $ 1,800

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