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Derivative Instruments (Fair Value of Fair Value Hedges) (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Derivatives, Fair Value [Line Items]    
Cumulative adjustment to Interest and dividends on investment securities $ (2) $ 132
Available-for-sale Securities    
Derivatives, Fair Value [Line Items]    
Fair value hedges, net (13,681) (15,394)
Other Assets    
Derivatives, Fair Value [Line Items]    
Fair value hedges, net $ 13,683 $ 15,262