Nature of Business and Significant Accounting Policies - Nature of Business (Details) $ in Millions		12 Months Ended
	Jun. 09, 2022 USD ($)	Dec. 31, 2023 branch
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash consideration | $	$ 46.7
Threshold period past due, writeoff		180 days
Commercial and Industrial
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Threshold period past due for non accrual of Interest		90 days
Residential Real Estate
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Threshold period past due for non accrual of Interest		120 days
MidWestOne Bank
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of branches | branch		57