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ADVANCES FROM FEDERAL HOME LOAN BANK (Details) - USD ($)
$ in Thousands
Jun. 30, 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 281,200 287,700
Loans with carrying values 2,110,000 2,060,000
Advance equivalents 1,680,000 $ 1,710,000
Federal Home Loan Bank of Des Moines    
ADVANCES FROM FEDERAL HOME LOAN BANK    
Credit under a borrowing arrangement $ 1,230,000