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LOAN SERVICING RIGHTS - Schedule of Carrying Value of Loan Servicing Rights Assets (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021
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Servicing Assets at Fair Value [Line Items] |  |  |  |  |  |
Loan servicing rights | $ 163,118 |  | $ 150,457 |  |  |
Residential mortgage |  |  |  |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |  |  |  |
Loan servicing rights | 160,021 | $ 149,986 | 147,014 | $ 257,112 | $ 232,236 | $ 206,944
SBA |  |  |  |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |  |  |  |
Loan servicing rights | $ 3,097 | $ 3,166 | $ 3,443 | $ 4,954 | $ 5,384 | $ 5,556

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