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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, 2025 | Mar. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Credit losses, 2025 | $ 19 | $ 34
Credit losses, 2024 | 31,373 | 24,467
Credit losses, 2023 | 22,567 | 19,192
Credit losses, 2022 | 6,038 | 4,631
Credit losses, 2021 | 1,441 | 659
Credit losses, prior | 271 | 210
Credit losses, Total Credit Losses | 61,709 | 49,193
Large Loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Credit losses, 2025 | 8 | 19
Credit losses, 2024 | 14,216 | 12,522
Credit losses, 2023 | 14,667 | 14,246
Credit losses, 2022 | 5,217 | 4,091
Credit losses, 2021 | 1,384 | 631
Credit losses, prior | 263 | 202
Credit losses, Total Credit Losses | 35,755 | 31,711
Small Loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Credit losses, 2025 | 11 | 15
Credit losses, 2024 | 17,157 | 11,945
Credit losses, 2023 | 7,900 | 4,767
Credit losses, 2022 | 749 | 436
Credit losses, 2021 | 44 | 20
Credit losses, prior | 7 | 5
Credit losses, Total Credit Losses | 25,868 | 17,188
Retail Loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Credit losses, 2023 |  | 179
Credit losses, 2022 | 72 | 104
Credit losses, 2021 | 13 | 8
Credit losses, prior | 1 | 3
Credit losses, Total Credit Losses | $ 86 | $ 294

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