v3.26.1
Borrowings - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Jul. 15, 2025
Jun. 01, 2025
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
May 31, 2020
Oct. 31, 2019
Debt Instrument [Line Items]              
Federal home loan bank advance     $ 150,000   $ 150,000 [1]    
Federal home loan bank stock     8,900   9,100    
Subordinated notes, net     14,702   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     $ 0 $ 200      
2029 Notes [Member]              
Debt Instrument [Line Items]              
Effective interest rate     8.00%        
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    
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        
Debt instrument, unamortized premium     $ 200        
Effective interest rate     7.92% 6.31%      
Federal Reserve Board Bank Term Funding Program [Member]              
Debt Instrument [Line Items]              
Borrowings available through discount window     $ 71,100   72,800    
Advance from federal reserve bank     0   0    
Unsecured Lines of Credit [Member]              
Debt Instrument [Line Items]              
Maximum overnight line of credit facilities available     10,000   10,000    
FHLB [Member]              
Debt Instrument [Line Items]              
Secured facility totaled     546,000   565,500    
Federal home loan bank advance     150,000   150,000    
Assets pledged with federal home loan bank against credit facilities     384,700        
FHLB [Member] | Securities [Member]              
Debt Instrument [Line Items]              
Assets pledged with federal home loan bank against credit facilities     161,300        
FHLB [Member] | Public Deposits with Treasury Board of Virginia [Member]              
Debt Instrument [Line Items]              
Line of credit     70,100   51,200    
FHLB [Member] | Restricted Equity Investments [Member]              
Debt Instrument [Line Items]              
Federal home loan bank stock     8,900   9,100    
FHLB [Member] | Line of Credit [Member]              
Debt Instrument [Line Items]              
Federal home loan bank advance     325,900   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   $ 50,000    
[1] Derived from audited December 31, 2025 Consolidated Financial Statements.