v3.25.4
Borrowings - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Jul. 15, 2025
Jun. 01, 2025
Dec. 31, 2025
Dec. 31, 2024
May 31, 2020
Oct. 31, 2019
Debt Instrument [Line Items]            
Federal home loan bank advance     $ 150,000 $ 150,000    
Federal home loan bank stock     9,100 9,400    
Subordinated notes, net     14,716 39,789    
Securities available for sale     332,928 312,035    
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     $ 400 900    
2029 Notes [Member]            
Debt Instrument [Line Items]            
Effective interest rate     8.37%      
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 $ 39,800    
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 Bay Banks Notes [Member]            
Debt Instrument [Line Items]            
Stated Interest Rate     5.625%      
Debt instrument, frequency of periodic payment     semi-annually      
Subordinated debt instrument variable interest rate spread     433.50%      
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]     us-gaap:SecuredOvernightFinancingRateSofrMember      
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     7.87% 5.92%    
Federal Reserve Board Bank Term Funding Program [Member]            
Debt Instrument [Line Items]            
Borrowings available through discount window     $ 72,800 $ 105,700    
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]            
Federal home loan bank advances, maximum borrowing capacity percentage on assets     30.00%      
Secured facility totaled     $ 565,500 696,000    
Federal home loan bank advance     150,000 150,000    
Assets pledged with federal home loan bank against credit facilities     400,000      
FHLB [Member] | Securities [Member]            
Debt Instrument [Line Items]            
Assets pledged with federal home loan bank against credit facilities     165,500      
FHLB [Member] | Public Deposits with Treasury Board of Virginia [Member]            
Debt Instrument [Line Items]            
Line of creidt     51,200 51,200    
FHLB [Member] | Restricted Equity Investments [Member]            
Debt Instrument [Line Items]            
Federal home loan bank stock     9,100 9,400    
FHLB [Member] | Line of Credit [Member]            
Debt Instrument [Line Items]            
Federal home loan bank advance     364,400 494,900    
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     $ 50,000 $ 50,000