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INVESTMENT SECURITIES - ACCRUED INTEREST (Details) - Other Assets. - USD ($)
Sep. 30, 2023
Dec. 31, 2022
Accounting Pronouncements    
Accrued interest on AFS debt securities excluded from ACLS $ 3,000,000 $ 2,000,000
Accrued interest on HTM debt securities excluded from ACLS $ 1,000,000 $ 92,000