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Mergers and Acquisitions - Summary of Unaudited Pro Forma Information (Parenthetical) (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Premier Financial Corporation [Member] |  |
Business Acquisition [Line Items] |  |
Net impact of after-tax purchase accounting accretion adjustments | $ 7.9 | $ 14.2

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