v3.26.1
Subordinated debt (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 06, 2025
Jun. 01, 2025
Jun. 01, 2020
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Debt Instrument                  
Repayment of subordinated debt               $ 33,000  
Subordinated debt         $ 83,392   $ 83,392   $ 83,187
Unamortized debt issuance costs         1,600   1,600   1,800
Interest expense on subordinated debt         1,750 $ 1,026 3,499 1,469  
Junior subordinated debt         8,194   8,194   8,140
Interest on junior subordinated debt         174 188 347 374  
Subordinate Notes Due 2030                  
Debt Instrument                  
Aggregate principal amount $ 33,000         33,000   33,000  
Interest rate 5.375%     5.375%          
Duration interest rate in effect       5 years          
Floated interest rate     9.08%            
Junior subordinated debt | FNCB                  
Debt Instrument                  
Aggregate principal amount $ 10,300         10,300   10,300  
Fair market value $ 8,000         8,000   8,000  
Trust preferred securities | FNCB                  
Debt Instrument                  
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] us-gaap:SecuredOvernightFinancingRateSofrMember                
Interest expense on subordinated debt         174 $ 188      
Basis spread adjustment 0.26161%                
Percentage of margin 1.67%                
Junior subordinated debt         $ 8,200   8,200   $ 8,100
Interest on junior subordinated debt             $ 347 $ 374  
Subordinate Notes Due 2035                  
Debt Instrument                  
Aggregate principal amount   $ 85,000              
Interest rate   7.75%              
Percentage of debt redeemed   100.00%              
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]   us-gaap:SecuredOvernightFinancingRateSofrMember              
Basis points added to the reference rate to compute the variable rate on the debt instrument   411              
From and including June 15, 2030, to but excluding the maturity date | Subordinate Notes Due 2035                  
Debt Instrument                  
Interest rate   7.75%