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Derivative Financial Instruments and Hedging Activities - Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2024
Dec. 31, 2023
Derivative [Line Items]    
Amortized cost $ 271,400  
Securities AFS    
Derivative [Line Items]    
Amortized cost of hedged assets 991,699 $ 487,486
Cumulative Amount of Fair Value Hedging Adjustments Included in the Carrying Amount of the Hedged Items 3,581 13,642
Amortized cost 625,900  
Cumulative increase (decrease) 1,200  
Hedged layer, amount 201,000  
Reclassification for discontinuance, before tax (4,600) 0
Loans    
Derivative [Line Items]    
Amortized cost of hedged assets 271,383 0
Cumulative Amount of Fair Value Hedging Adjustments Included in the Carrying Amount of the Hedged Items (385) 0
Cumulative increase (decrease) 385  
Hedged layer, amount 155,000  
Reclassification for discontinuance, before tax $ (4,200) $ 0