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Mergers and Acquisitions - Summary of Unaudited Pro Forma Information (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Premier Financial Corporation [Member]
Business Combination [Line Items]
Net impact of after-tax purchase accounting accretion adjustments	$ 7.3	$ 9.3	$ 23.7	$ 34.9

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- Definition

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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