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Loans and Allowance for Credit Losses - Additional Information (Details) - USD ($)
12 Months Ended
Jan. 01, 2021
Dec. 31, 2023
Dec. 31, 2022
Loans and Allowance for Credit Losses      
Interest income   $ 0 $ 0
Non-accrual loans for no related allowance amortized cost   $ 792,000  
Maximum percentage of concessions granted of their respective classes of loan portfolios   2.00%  
Loan modifications     2,949,000
Troubled debt restructurings internal grading system substandard     1,700,000
Allowance for credit losses $ 67,300,000    
After-tax effect decreased retained earnings 14,200,000    
Minimum loan balance with addition to TDR status for classification of loans into Collateral-dependent loans   $ 100,000  
Consumer      
Loans and Allowance for Credit Losses      
Loan modifications     $ 252,000
Consumer | Principal forgiveness      
Loans and Allowance for Credit Losses      
Loan paid during period   563,000  
Commercial business loan | Principal forgiveness      
Loans and Allowance for Credit Losses      
Loan paid during period   $ 563,000  
Allowance for unfunded commitment      
Loans and Allowance for Credit Losses      
Allowance for credit losses 8,700,000    
Adopted ASC 326      
Loans and Allowance for Credit Losses      
Allowance for credit losses 11,600,000    
CECL Methodology      
Loans and Allowance for Credit Losses      
Allowance for credit losses 11,600,000    
Allowance for credit loss remaining discount on loan 1,900,000    
CECL Methodology | Allowance for unfunded commitment      
Loans and Allowance for Credit Losses      
Allowance for credit losses $ 8,700,000