v3.26.1
Long-Term Debt and FHLB Stock (Narrative) (Details)
6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
subsidiary
$ / shares
Dec. 31, 2025
USD ($)
$ / shares
Dec. 31, 2005
USD ($)
$ / shares
shares
Long-Term Debt And Federal Home Loan Bank [Line Items]      
Advances from the Federal Home Loan Bank $ 5,153,000 $ 25,153,000  
Number of wholly owned subsidiaries | subsidiary 1    
Common stock, par value (in dollars per share) | $ / shares $ 0.01 $ 0.01  
Federal Reserve Bank advances      
Long-Term Debt And Federal Home Loan Bank [Line Items]      
Line of credit, maximum borrowing capacity $ 136,838,000 $ 155,646,000  
Line of credit facility, maximum amount outstanding during period 0 0  
Zions Bank      
Long-Term Debt And Federal Home Loan Bank [Line Items]      
Line of credit, maximum borrowing capacity 10,000,000    
Line of credit facility, maximum amount outstanding during period 0 0  
Pacific Coast Bankers Bank      
Long-Term Debt And Federal Home Loan Bank [Line Items]      
Line of credit, maximum borrowing capacity 50,000,000    
Line of credit facility, maximum amount outstanding during period 0 $ 0  
Subordinated Debt      
Long-Term Debt And Federal Home Loan Bank [Line Items]      
Subordinated debt securities $ 5,155,000    
Interest rate, variable rate basis three-month term Secured Overnight Financing Rate    
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] us-gaap:SecuredOvernightFinancingRateSofrMember    
Interest variable rate 2.00%    
Relative spread adjustment 0.26%    
Effective interest during period 5.90% 6.14%  
Stated maturity date May 23, 2035    
Subordinated Debt | RSB Capital Trust I      
Long-Term Debt And Federal Home Loan Bank [Line Items]      
Trust term     30 years
Subordinated Debt | Private placement | RSB Capital Trust I      
Long-Term Debt And Federal Home Loan Bank [Line Items]      
Number of preferred securities issued     $ 5,000
Common stock issued | shares     155
Common stock, par value (in dollars per share) | $ / shares     $ 1
Federal Home Loan Bank of New York ("FHLBNY")      
Long-Term Debt And Federal Home Loan Bank [Line Items]      
Preapproved secured line of credit with the FHLB $ 734,922,000 $ 650,791,000  
Pledged assets 523,284,000 514,823,000  
FHLB secured line of credit 365,095,000 306,410,000  
Advances from the Federal Home Loan Bank 5,153,000    
Impairment related to Federal Home Loan Bank 0 0  
Federal Home Loan Bank of New York ("FHLBNY") | Maturity Overnight      
Long-Term Debt And Federal Home Loan Bank [Line Items]      
Advances from the Federal Home Loan Bank $ 0 $ 0