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Loans and Allowance for Credit Losses - Narrative (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2025 USD ($) loan commitment	Sep. 30, 2025 USD ($) loan commitment	Sep. 30, 2024 USD ($) commitment	Dec. 31, 2024 USD ($)
Receivables [Abstract]
Unearned income	$ 4.7	$ 4.7		$ 4.3
Purchase accounting fair value adjustments	$ 2.1	$ 2.1		$ 2.5
Number of subsequent payment defaults | loan	3	5
Amount of defaulted TDRs that defaulted	$ 0.2	$ 3.7	$ 0.1
Number of commitments to lend | commitment	11	11	4
Commitment to lend	$ 0.2	$ 0.2	$ 0.6
Subsequent to defaults, payments received to make current	$ 3.5	$ 3.5

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