Interest Rate Derivatives - Cumulative Basis Adjustments for Fair Value Hedges (Parenthetical) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Derivative [Line Items]
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets	Other Assets
Interest Rate Derivatives [Member]
Derivative [Line Items]
Derivative Asset	$ 5.2	$ 8.2
Net Derivative Assets	1.2
Available for Sale Securities [Member] | Interest Rate Derivatives [Member]
Derivative [Line Items]
Derivative Notional Amount	56.0	68.7
Loans Receivable [Member] | Interest Rate Derivatives [Member]
Derivative [Line Items]
Amount of designated hedging item	$ 36.7	$ 37.2