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Securities Securities - Premium Amortization and Discount Accretion Included in Income on Securities (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Investments, Debt and Equity Securities [Abstract] |  |  |  |
Premium amortization | $ (15,078) | $ (16,570) | $ (30,091) | $ (34,523)
Discount accretion | 4,895 | 5,032 | 9,963 | 9,737
Net (premium amortization) discount accretion | $ (10,183) | $ (11,538) | $ (20,128) | $ (24,786)

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