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Borrowings - Additional Information (Details)
 1 Months Ended 12 Months Ended
Oct. 15, 2021
USD ($)
Jun. 30, 2021
USD ($)
Sep. 30, 2016
USD ($)
Dec. 31, 2021
USD ($)
line_of_credit
Dec. 31, 2020
USD ($)
line_of_credit
Dec. 31, 2007
USD ($)
security
Debt Instrument [Line Items]            
Number of unsecured lines of credit issued | line_of_credit       1 1  
Pledge on certain loan amount       $ 10,000,000 $ 10,000,000  
Line of credit, outstanding amount       0 0  
Federal home loan balance       150,000,000    
Loans pledged       1,300,000,000 1,200,000,000  
Remaining borrowing capacity       932,700,000 797,400,000  
Advances from federal home loan banks       0 0  
Prepayments       190,400,000    
Prepayments totaled       $ 7,900,000    
Weighted average rate borrowing       2.20%    
Naming applicable municipalities as beneficiaries       $ 10,400,000 $ 57,300,000  
Unamortized debt issuance costs       $ 1,300,000    
Subordinated Debt            
Debt Instrument [Line Items]            
Number of preferred trust securities | security           2
Floating rate trust preferred securities           $ 10,000,000
Effective percentage       1.75% 1.80%  
Trust preferred securities, interest payment deferment period       5 years    
Subordinated Debt | LIBOR            
Debt Instrument [Line Items]            
Line of credit, basis spread on variable rate       1.55%    
Notes Maturing In October 2026 | Subordinated Debt            
Debt Instrument [Line Items]            
Floating rate trust preferred securities     $ 50,000,000      
Interest rate, percentage     5.75%      
Principal amount plus 100.00%          
Aggregate redemption price $ 50,700,000          
Debt instrument increase accrued interest 719,000          
Notes Maturing In October 2026 | Subordinated Debt | LIBOR            
Debt Instrument [Line Items]            
Line of credit, basis spread on variable rate     4.55%      
Notes Maturing In October 2031 | Subordinated Debt            
Debt Instrument [Line Items]            
Floating rate trust preferred securities $ 85,000,000 $ 85,000,000        
Interest rate, percentage 3.25% 3.25%        
Proceeds from issuance of subordinated long-term debt   $ 83,500,000        
Notes Maturing In October 2031 | Subordinated Debt | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate            
Debt Instrument [Line Items]            
Line of credit, basis spread on variable rate       2.58%    
Line of Credit | Overnight Borrowing Agreements            
Debt Instrument [Line Items]            
Line of credit, outstanding amount       $ 0 $ 0