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FAIR VALUE - Changes in Mortgage Servicing Rights (Details) - Mortgage Servicing Rights [Member] - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2022 | Mar. 31, 2021
Changes in Mortgage Servicing Rights [Roll Forward] |  |  |  |
Beginning balance | $ 3,741 | $ 144 | $ 3,690 | $ 155
Additions | 405 | 0 | 573 | 0
Adjustment to fair value | (118) | (14) | (235) | (25)
Ending balance | $ 4,028 | $ 130 | $ 4,028 | $ 130

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