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Securities Securities - Premium Amortization and Discount Accretion Included in Income on Securities (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023
Investments, Debt and Equity Securities [Abstract] |  |
Premium amortization | $ (17,953) | $ (25,925)
Discount accretion | 4,705 | 5,405
Net (premium amortization) discount accretion | $ (13,248) | $ (20,520)

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