Goodwill and Acquired Intangible Assets - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Estimated amortization expense, next year	$ 23.6
Estimated amortization expense in two years	19.9
Estimated amortization expense in three years	16.4
Estimated amortization expense in four years	13.0
Estimated amortization expense in five years	9.3
Mortgage service rights retained from sale of SBA	$ 1.7	$ 1.7
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Intangible assets, useful life	10 years
Customer Relationships | Drummond Banking Company
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 2.6
Accumulated amortization	$ 0.3
Intangible assets, useful life	10 years