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INVESTMENT SECURITIES - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Schedule of Available-for-sale Securities [Line Items]      
Tax exempt interest income on available-for-sale securities $ 11.9 $ 10.2 $ 10.7
Realized loss on trading securities $ (7.0)    
Mortgage Backed Securities And Collateralized Mortgage Obligations      
Schedule of Available-for-sale Securities [Line Items]      
Weighted average yield 3.08% 1.82%  
U.S. Treasury securities | Not Designated as Hedging Instrument, Economic Hedge      
Schedule of Available-for-sale Securities [Line Items]      
Trading securities - U.S. Treasury securities $ 19.0