Deposits (Details) $ in Millions	Mar. 31, 2023 USD ($)
Retail accounts
Cash and Cash Equivalents [Line Items]
Percentage of deposit held	48.60%
Commercial accounts
Cash and Cash Equivalents [Line Items]
Percentage of deposit held	33.20%
Municipal relationships
Cash and Cash Equivalents [Line Items]
Percentage of deposit held	12.50%
Letters of credit pledged as collateral	$ 292.0
Brokered deposits
Cash and Cash Equivalents [Line Items]
Percentage of deposit held	5.70%
Deposit insured by FDIC
Cash and Cash Equivalents [Line Items]
Percentage of deposit held	76.60%
Deposit uninsured by FDIC
Cash and Cash Equivalents [Line Items]
Percentage of deposit held	23.40%
Deposit liabilities uninsured by FDIC	$ 757.4