Loans and Allowance for Credit Losses - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2026 USD ($) default commitment	Mar. 31, 2025 USD ($) default commitment	Dec. 31, 2025 USD ($)
Financing Receivable, Past Due [Line Items]
Unearned income	$ 4.1		$ 4.8
Purchase accounting fair value adjustments	$ 1.9		$ 2.0
Number of modified contracts with payment default | default	1	1
Amount of defaulted TDRs that defaulted	$ 3.4	$ 3.8
Number of commitments to lend | commitment	13	10
Commitment to lend	$ 1.3	$ 0.5