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Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Jan. 01, 2023
Apr. 30, 2021
Significant Accounting Policies [Line Items]            
Stock issued during period, value, new issues $ 131,000 $ 32,000 $ 428,000 $ 304,000    
Stock repurchased during period, shares (in shares) 0          
Stock repurchased during period, value       $ 682,000    
Stock repurchase program, number of shares authorized to be repurchased (in shares)           375,388
Stock repurchase program, percent of stock outstanding           5.00%
Allowance for credit loss $ 0   $ 0   $ 7,200,000  
Additional allowance for credit loss on unfunded commitments         3,300,000  
Number of days individually evaluation     60 days      
Other Assets [Member]            
Significant Accounting Policies [Line Items]            
Allowance for credit loss         1,500,000  
Additional allowance for credit loss on unfunded commitments         688,000  
Retained Earnings [Member]            
Significant Accounting Policies [Line Items]            
Allowance for credit loss         5,500,000  
Additional allowance for credit loss on unfunded commitments         $ 2,600,000  
Directors' Stock Purchase Plan [Member]            
Significant Accounting Policies [Line Items]            
Stock issued during period, shares, new issues (in shares) 3,340          
Stock issued during period, value, new issues $ 76,000          
Employee Stock Purchase Plan [Member]            
Significant Accounting Policies [Line Items]            
Stock issued during period, shares, new issues (in shares) 3,189          
Stock issued during period, value, new issues $ 53,000