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DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES - Narrative (Details) - USD ($)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Derivative [Line Items]    
Securities available for sale, at estimated fair value $ 1,296,294,000 $ 1,299,014,000
Gain (loss) on hedging activity 6,500,000  
Cash collateral received from counterparties under master netting agreements 46,760,000 $ 82,135,000
Fair Value Hedging    
Derivative [Line Items]    
Securities available for sale, at estimated fair value 460,400,000  
Interest Rate Swaps | Cash Flow Hedging    
Derivative [Line Items]    
Derivative, Notional Amount $ 1,010,000,000.00