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Subordinated Notes (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Aug. 20, 2020
Subordinated Borrowing [Line Items]      
Basis spread on variable rate (percent) 1.48%    
Long-term Debt, Gross     $ 175.0
Debt Instrument, Interest Rate, Stated Percentage     4.50%
Debt Issuance Costs, Gross     $ 2.4
Subordinated debt      
Subordinated Borrowing [Line Items]      
Basis spread on variable rate (percent) 4.39%    
Long-term Debt $ 173.2 $ 172.8  
Trust I      
Subordinated Borrowing [Line Items]      
Preferred securities issued 15.0    
Junior subordinated notes      
Subordinated Borrowing [Line Items]      
Junior subordinated debt purchased by Trust I $ 15.5