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Significant Accounting Policies - Additional Information (Details)
 12 Months Ended
Dec. 31, 2025
USD ($)
Fee
RevenueCategory
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Summary Of Significant Accounting Policies [Line Items]      
Percentage of outstanding principal to be repurchased under GNMA optional repurchase program 100.00%    
Number of days to pass to be classified as past due LHFI 30 days    
Finite-lived intangible assets, average useful life 20 years    
Securities with limited marketability $ 42,000,000 $ 44,900,000  
Other-than-temporary impairment of investment in member bank stock $ 0 0 $ 0
Number of types of interchange fees | Fee 2    
Other real estate sales, net (losses) gains $ (1,759,000) $ (1,104,000) $ (145,000)
Number of trust management revenue categories | RevenueCategory 4    
Time period between service obligation completed and payment received from trust customer 30 days    
Credit Card Loans [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Number of days past due loans are to be charged-off 180 days    
Commercial Credits [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Number of days past due for loan to be classified as nonaccrual 90 days    
Non-Business Purpose Credits [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Number of days past due for loan to be classified as nonaccrual 120 days    
Number of days past due loans are to be charged-off 120 days    
Minimum [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Number of days mortgage LHFS are retained on balance sheet 30 days    
Minimum [Member] | Furniture and Equipment [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Estimated useful lives of the assets 3 years    
Maximum [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Number of days mortgage LHFS are retained on balance sheet 45 days    
Maximum [Member] | Buildings [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Estimated useful lives of the assets 39 years    
Maximum [Member] | Furniture and Equipment [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Estimated useful lives of the assets 10 years    
Maximum [Member] | 1-4 Family Residential Real Estate [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Number of days past due loans are to be charged-off 180 days    
ASU 2016-13 [Member] | Securities Available for Sale [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Current expected credit loss $ 0