v3.26.1
Loans, ACL, and OREO - Additional Information (Detail)
 3 Months Ended 6 Months Ended 12 Months Ended
Jan. 01, 2026
USD ($)
Jun. 30, 2026
USD ($)
Mar. 31, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Loan
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Mar. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Loans and Leases Receivable Disclosure [Line Items]                  
Interest income from nonaccrual loans   $ 269,000   $ 30,000 $ 290,000 $ 148,000      
Accrued interest excluded from ACL   8,600,000     8,600,000   $ 9,100,000    
Loans pledged   1,852,003,000     1,852,003,000   1,864,512,000    
Current period gross charge-offs revolving         3,515,000        
Credit loss on recovery         3,300,000        
Recorded investment of PCD Loans         29,000,000   29,800,000    
Recorded investment, estimated allowance for credit loss         200,000   200,000    
Recorded investment, PCD Discount (Premium)         $ 1,800,000   2,000,000    
Amount of special mention loan     $ 300,000            
Amount of remove the special mention loan $ 1,000,000                
Loan amount evaluated $ 33,900,000                
Number of residential mortgage loans in the process of foreclosure | Loan         7        
Mortgage loans with total amortized cost         $ 2,800,000        
Other liabilities   17,291,000     17,291,000   19,209,000 [1]    
Carrying value of the OREO portfolio   1,400,000     $ 1,400,000   1,400,000    
Guaranteed Portion of the Loan Owned By U.S. Small Business Administration         90.00%        
Unfunded commitments   0     $ 0   0    
Loan on nonaccrual status   28,629,000     28,629,000   20,605,000    
Reserve for loan losses   22,039,000 19,184,000 21,974,000 22,039,000 21,974,000 19,444,000 [1] $ 23,126,000 $ 23,023,000
Business and consumer credit cards [Member]                  
Loans and Leases Receivable Disclosure [Line Items]                  
Current period gross charge-offs revolving         3,300,000        
Small Business Administration Loans [Member]                  
Loans and Leases Receivable Disclosure [Line Items]                  
Other liabilities   1,200,000     1,200,000   1,200,000    
Out-of-market Loan [Member]                  
Loans and Leases Receivable Disclosure [Line Items]                  
Loan on nonaccrual status   11,400,000     11,400,000        
Reserve for loan losses   2,900,000     2,900,000        
Commercial and Residential Mortgages Loans [Member] | Asset Pledged as Collateral without Right [Member] | Federal Home Loan Bank Advances [Member]                  
Loans and Leases Receivable Disclosure [Line Items]                  
Loans pledged   637,000,000     637,000,000   695,100,000    
Commercial and Industrial [Member]                  
Loans and Leases Receivable Disclosure [Line Items]                  
Loans pledged   276,589,000     276,589,000   282,745,000    
Current period gross charge-offs revolving         3,195,000        
Loan on nonaccrual status   16,964,000     16,964,000   6,639,000    
Reserve for loan losses   7,172,000 $ 3,846,000 $ 5,846,000 7,172,000 $ 5,846,000 4,337,000 $ 5,726,000 $ 5,767,000
Commercial and Industrial [Member] | Asset Pledged as Collateral without Right [Member] | FRB [Member]                  
Loans and Leases Receivable Disclosure [Line Items]                  
Loans pledged   $ 45,300,000     $ 45,300,000   $ 72,800,000    
[1] Derived from audited December 31, 2025 Consolidated Financial Statements.