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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

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