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BUSINESS COMBINATIONS - Consideration Paid (Details) - Savoy Bank - USD ($) $ in Thousands |  |  | 6 Months Ended
--- | --- | --- | ---
May 26, 2021 | Apr. 30, 2021 | Mar. 31, 2022
Consideration Paid [Abstract] |  |  |
Common stock issued (1,357,567 shares issued) | $ 32,521 |  |
Cash payments to common shareholders | 32,991 |  |
Total consideration paid | $ 65,512 |  |
Business Combination [Abstract] |  |  |
Goodwill deductible for income tax purposes |  |  | $ 0
Maximum |  |  |
Business Combination [Abstract] |  |  |
Fair value refinement period |  |  | 1 year
Common Stock |  |  |
Consideration Paid [Abstract] |  |  |
Total consideration paid |  | $ 65,500 |
Business Combination [Abstract] |  |  |
Common stock issued as part of consideration (in shares) | 1,357,567 |  |

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