v3.26.1
Allowance for Credit Losses on Loans - Composition of Nonaccrual Loans by Class (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Financing Receivable Impaired [Line Items]      
Nonaccrual Loans with No Allowance $ 10    
Nonaccrual Loans with an Allowance 761   $ 378
Total Nonaccrual Loans 771   378
Interest Income 31 $ 9  
Real Estate - Residential [Member]      
Financing Receivable Impaired [Line Items]      
Nonaccrual Loans with No Allowance 10    
Nonaccrual Loans with an Allowance 479   179
Total Nonaccrual Loans 489   179
Interest Income 23 $ 9  
Home Equity [Member]      
Financing Receivable Impaired [Line Items]      
Nonaccrual Loans with an Allowance 259   199
Total Nonaccrual Loans 259   $ 199
Interest Income 7    
Consumer Loans [Member]      
Financing Receivable Impaired [Line Items]      
Nonaccrual Loans with an Allowance 23    
Total Nonaccrual Loans 23    
Interest Income $ 1