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Description of Business and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]      
Days from origination after which mortgage loans are sold 30 days    
Loan upon which a default of principal or interest has existed for a period 90 days    
Accrued Interest and reversed against interest income $ 812,000 $ 429,000 $ 147,000
Intangible assets, Estimated useful lives 5 years    
Advertising costs $ 3,400,000 $ 3,200,000 $ 3,000,000.0
Revenue recognition, description of performance obligation the Company offers various services to customers that generate revenue. Contract performance typically occurs in one year or less.    
Incremental cost of obtaining contract true    
Revenue recognition, description of payment terms Revenue is recognized when the transactions occur or as services are performed over primarily monthly or quarterly periods. Payment is typically received in the period the transactions occur, or in some cases, within 90 days of the service period.    
Delinquency period placed on nonaccrual status loan 90 days    
Commercial loans are charged off deemed uncollectible period 180 days    
ASU 2023-07 [Member]      
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]      
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] true    
Change in Accounting Principle, Accounting Standards Update, Adoption Date Dec. 15, 2023    
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false] true    
U.S. Treasury or U.S. Government-sponsored Entities and Agencies [Member]      
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]      
Percentage of available for sale securities held 98.00% 98.00%  
Core Deposit Intangibles [Member]      
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]      
Intangible assets, Estimated useful lives 5 years    
Core Deposit Intangibles [Member] | Minimum [Member]      
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]      
Intangible assets, Estimated useful lives 7 years    
Core Deposit Intangibles [Member] | Maximum [Member]      
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]      
Intangible assets, Estimated useful lives 10 years    
Customer Relationship Intangibles [Member] | Minimum [Member]      
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]      
Intangible assets, Estimated useful lives 3 years    
Customer Relationship Intangibles [Member] | Maximum [Member]      
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]      
Intangible assets, Estimated useful lives 18 years