v3.24.3
Derivative Financial Instruments Derivative Financial Instruments - Narrative (Details)
 9 Months Ended
Sep. 30, 2024
USD ($)
instrument
Dec. 31, 2023
USD ($)
instrument
Derivative [Line Items]    
Cash collateral pledged for derivatives $ 101,500,000 $ 119,000,000
CashCollateralPostedForDerivativesInLiabilityPosition $ 17,700,000 $ 42,300,000
Risk participation agreement - participant bank    
Derivative [Line Items]    
Instruments held | instrument 16 14
Non-hedging derivatives, notional amoount $ 219,000,000 $ 230,700,000
Maximum exposure $ 2,300,000 $ 4,500,000
Risk participation agreement - lead bank    
Derivative [Line Items]    
Instruments held | instrument 19 15
Non-hedging derivatives, notional amoount $ 253,000,000 $ 204,800,000
Interest rate contract    
Derivative [Line Items]    
Unrealized losses, net of tax to AOCI 17,800,000  
Amount reclassified from AOCI into interest income on loans 54,400,000  
Amount reclassified from AOCI as a decrease to interest income $ 26,000,000  
Maximum period to hedge forecasted transactions 1 year 5 months 1 day  
Loans Receivable | Not Designated as Hedging Instrument    
Derivative [Line Items]    
Credit risk exposure, net of collateral pledged, relating to derivatives $ 43,000,000 $ 32,900,000