v3.26.1
Fair value estimates - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Recurring Basis - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value $ 472,315 $ 515,161
U.S. Treasury securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 18,020 30,998
State and municipals, Taxable    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 58,214 61,622
State and municipals, Tax-exempt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 139,168 125,117
Residential mortgage-backed securities, U.S. government agencies    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 20,618 42,699
Residential mortgage-backed securities, U.S. government-sponsored enterprises    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 145,343 160,080
Commercial mortgage-backed securities: U.S. government-sponsored enterprises    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 1,689 1,770
Private collateralized mortgage obligations    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 48,463 48,484
Asset backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 15,366 16,267
Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 21,644 24,794
Negotiable certificates of deposit    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 736 732
Common equity securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 3,054 2,598
Interest rate swap-other assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 14,373 15,583
Interest rate swap-other liabilities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Liabilities measured at fair value (14,097) (15,345)
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 21,074 33,596
Level 1 | U.S. Treasury securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 18,020 30,998
Level 1 | Common equity securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 3,054 2,598
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 450,359 480,577
Level 2 | State and municipals, Taxable    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 58,214 61,622
Level 2 | State and municipals, Tax-exempt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 139,168 125,117
Level 2 | Residential mortgage-backed securities, U.S. government agencies    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 20,618 42,699
Level 2 | Residential mortgage-backed securities, U.S. government-sponsored enterprises    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 145,343 160,080
Level 2 | Commercial mortgage-backed securities: U.S. government-sponsored enterprises    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 1,689 1,770
Level 2 | Private collateralized mortgage obligations    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 48,463 48,484
Level 2 | Asset backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 15,366 16,267
Level 2 | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 20,762 23,806
Level 2 | Negotiable certificates of deposit    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 736 732
Level 2 | Interest rate swap-other assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 14,373 15,583
Level 2 | Interest rate swap-other liabilities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Liabilities measured at fair value (14,097) (15,345)
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value 882 988
Level 3 | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets measured at fair value $ 882 $ 988