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BORROWINGS - Additional information (Details) - USD ($)
$ in Millions
Mar. 15, 2021
Sep. 15, 2020
Dec. 31, 2022
BORROWINGS      
Unused lines of credit     $ 25.0
Federal Home Loan Bank unused borrowing capacity     1,080.0
Federal Reserve unused borrowing capacity     $ 490.5
Community Capital Trust IV [Member]      
BORROWINGS      
Redemption of debentures and associated preferred securities $ 77.3    
Kinderhook Capital Trust [Member]      
BORROWINGS      
Redemption of debentures and associated preferred securities   $ 2.1