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Fair Value Measurements (Details - Finance receivables to their contractual balances) - USD ($) $ in Thousands | Sep. 30, 2025 | Jun. 30, 2025 | Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023
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Fair Value Disclosures [Abstract] |  |  |  |  |  |
Finance receivables contractual balance | $ 3,759,339 |  | $ 3,485,540 |  |  |
Finance receivables measured at fair value | $ 3,624,941 | $ 3,559,029 | $ 3,313,767 | $ 3,132,310 | $ 2,960,375 | $ 2,722,662

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