Mergers and Acquisitions - Summary of Unaudited Pro Forma Information (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Premier Financial Corporation [Member]
Business Combination [Line Items]
Net impact of after-tax purchase accounting accretion adjustments	$ 7.2	$ 10.4	$ 15.0	$ 24.5

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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