v3.26.1
Borrowings - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 15, 2025
Jun. 01, 2025
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
May 31, 2020
Oct. 31, 2019
Debt Instrument [Line Items]                  
Federal home loan bank advance     $ 150,000   $ 150,000   $ 150,000 [1]    
Federal home loan bank stock     8,900   8,900   9,100    
Subordinated notes, net     $ 14,688   14,688   14,716 [1]    
2030 Notes [Member]                  
Debt Instrument [Line Items]                  
Redemption end date   Jun. 01, 2025              
Redemption of Notes   $ 15,000              
Effective interest rate   6.00%              
Interest Expense, Debt       $ 200   $ 400      
2029 Notes [Member]                  
Debt Instrument [Line Items]                  
Effective interest rate     8.01%            
Partial redemption end date Jul. 15, 2025                
Partial redemption of notes $ 10,000                
Subordinated debt [Member]                  
Debt Instrument [Line Items]                  
Subordinated notes, net     $ 14,700   $ 14,700   14,700    
Subordinated debt [Member] | 2030 Notes [Member]                  
Debt Instrument [Line Items]                  
Subordinated debt instrument maturity date         Jun. 01, 2030        
Subordinated notes, net               $ 15,000  
Subordinated debt [Member] | 2029 Notes [Member]                  
Debt Instrument [Line Items]                  
Subordinated debt instrument maturity date         Oct. 15, 2029        
Subordinated notes, net                 $ 25,000
Debt instrument carrying amount     14,700   $ 14,700        
Debt instrument, unamortized premium     $ 200   $ 200        
Effective interest rate     7.43% 7.48% 7.68% 7.44%      
Federal Reserve Board Bank Term Funding Program [Member]                  
Debt Instrument [Line Items]                  
Borrowings available through discount window     $ 45,300   $ 45,300   72,800    
Advance from federal reserve bank     0   0   0    
Unsecured Lines of Credit [Member]                  
Debt Instrument [Line Items]                  
Maximum overnight line of credit facilities available     10,000   10,000   10,000    
FHLB [Member]                  
Debt Instrument [Line Items]                  
Secured facility totaled     521,900   521,900   565,500    
Federal home loan bank advance     150,000   150,000   150,000    
Assets pledged with federal home loan bank against credit facilities     366,300   366,300        
FHLB [Member] | Securities [Member]                  
Debt Instrument [Line Items]                  
Assets pledged with federal home loan bank against credit facilities     155,600   155,600        
FHLB [Member] | Public Deposits with Treasury Board of Virginia [Member]                  
Debt Instrument [Line Items]                  
Line of credit     70,100   70,100   51,200    
FHLB [Member] | Restricted Equity Investments [Member]                  
Debt Instrument [Line Items]                  
Federal home loan bank stock     8,900   8,900   9,100    
FHLB [Member] | Line of Credit [Member]                  
Debt Instrument [Line Items]                  
Federal home loan bank advance     301,900   301,900   364,400    
FHLB [Member] | Line of Credit [Member] | Public Deposits with Treasury Board of Virginia [Member]                  
Debt Instrument [Line Items]                  
Assets pledged with federal home loan bank against credit facilities     $ 70,000   $ 70,000   $ 50,000    
[1] Derived from audited December 31, 2025 Consolidated Financial Statements.