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Finance Receivables, Credit Quality Information, and Allowance for Credit Losses - Summary of Credit Losses by Product and Origination Year (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2026 | Mar. 31, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Credit losses, 2026 | $ 16 | $ 19
Credit losses, 2025 | 39,922 | 31,373
Credit losses, 2024 | 22,812 | 22,567
Credit losses, 2023 | 6,113 | 6,038
Credit losses, 2022 | 1,899 | 1,441
Credit losses, prior | 399 | 271
Credit losses, Total Credit Losses | 71,161 | 61,709
Large Loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Credit losses, 2026 | 2 | 8
Credit losses, 2025 | 20,345 | 14,216
Credit losses, 2024 | 14,277 | 14,667
Credit losses, 2023 | 5,106 | 5,217
Credit losses, 2022 | 1,818 | 1,384
Credit losses, prior | 394 | 263
Credit losses, Total Credit Losses | 41,942 | 35,755
Small Loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Credit losses, 2026 | 14 | 11
Credit losses, 2025 | 19,577 | 17,157
Credit losses, 2024 | 8,535 | 7,900
Credit losses, 2023 | 1,007 | 821
Credit losses, 2022 | 81 | 57
Credit losses, prior | 5 | 8
Credit losses, Total Credit Losses | $ 29,219 | $ 25,954

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