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BORROWINGS - Narrative (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Federal Home Loan Bank and Other Borrowings [Line Items] |  |
Borrowings outstanding | $ 1,000,000 | $ 1,745,000
FHLB stock | 50,700 | 55,300
AFX Overnight And Short Term Borrowings. |  |
Federal Home Loan Bank and Other Borrowings [Line Items] |  |
Borrowings outstanding | 0 | 0
Federal Reserve Bank Advances |  |
Federal Home Loan Bank and Other Borrowings [Line Items] |  |
Available borrowing capacity | 1,600,000 | 710,000
Federal Home Loan Bank Advances | Federal Home Loan Bank of Des Moines |  |
Federal Home Loan Bank and Other Borrowings [Line Items] |  |
Available borrowing capacity | $ 1,300,000 | 2,100,000
Bank Term Funding Program | Federal Reserve Bank Advances |  |
Federal Home Loan Bank and Other Borrowings [Line Items] |  |
Borrowings outstanding |  | $ 645,000

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