MORTGAGE SERVICING RIGHTS - Mortgage Loan Portfolio (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Acquired Finite-Lived Intangible Assets [Line Items]
Loans serviced for others	$ 1,188,701	$ 1,221,795
Federal National Mortgage Association (FNMA)
Acquired Finite-Lived Intangible Assets [Line Items]
Loans serviced for others	725,880	736,042
Federal Home Loan Mortgage Corporation (FHLMC)
Acquired Finite-Lived Intangible Assets [Line Items]
Loans serviced for others	462,367	485,270
Federal Home Loan Banks (FHLB)
Acquired Finite-Lived Intangible Assets [Line Items]
Loans serviced for others	$ 454	$ 483