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ADVANCES FROM FEDERAL HOME LOAN BANK (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
ADVANCES FROM FEDERAL HOME LOAN BANK
Outstanding term advances from Federal Home Loan Bank	$ 0	$ 0
Investment securities with carrying values	284,800	287,700
Loans with carrying values	2,170,000	2,060,000
Advance equivalents	1,710,000	$ 1,710,000
Federal Home Loan Bank of Des Moines
ADVANCES FROM FEDERAL HOME LOAN BANK
Credit under a borrowing arrangement	$ 1,240,000

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Amount of the investment securities which are collateral pledged in support of federal home loan bank advances outstanding.

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Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

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