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Guarantees - Changes from credit recourses agreements (Details) - Guarantee on loans sold or serviced with credit recourse - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Guarantor Obligations |  |  |  |
Balance as of beginning of period | $ 6,223 | $ 9,095 | $ 6,897 | $ 11,800
Provision (benefit) for recourse liability | 228 | (1,718) | 52 | (2,067)
Net charge-offs | (54) | (184) | (552) | (2,540)
Balance as of end of period | $ 6,397 | $ 7,193 | $ 6,397 | $ 7,193

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