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LOAN SERVICING RIGHTS - Schedule of Carrying Value of Loan Servicing Rights Assets (Details) - 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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Servicing Assets at Fair Value [Line Items] |  |  |  |  |  |
Total loan servicing rights | $ 109,029 |  | $ 115,440 |  |  |
Residential mortgage |  |  |  |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |  |  |  |
Total loan servicing rights | 106,411 | $ 126,022 | 112,514 | $ 101,855 | $ 145,306 | $ 171,915
SBA |  |  |  |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |  |  |  |
Total loan servicing rights | $ 2,618 | $ 2,786 | $ 2,926 | $ 1,927 | $ 2,156 | $ 2,737

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