Short-Term Borrowings and Long-Term Debt - Long-term Debt (Details) - Subordinated Debt - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Long-term debt total	$ 148.0	$ 148.0
Weighted-average rate (as a percent)	6.39%	3.49%
Maximum
Debt Instrument [Line Items]
Long-term debt remaining maturities (in years)	14 years 6 months
Minimum
Debt Instrument [Line Items]
Long-term debt remaining maturities (in years)	11 years 7 months 6 days