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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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Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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