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Fair value of financial instruments - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Recurring Basis - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value | $ 399,025 | $ 477,813
U.S. Treasury securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value | 184,057 | 180,297
U.S. government-sponsored enterprises |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value | 2,152 | 16,370
State and municipals, Taxable |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value | 57,100 | 55,358
State and municipals, Tax-exempt |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value | 67,124 | 88,407
Corporate Debt Securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value | 3,730 | 3,626
Mortgage-backed Securities, U.S. Government agencies |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value | 724 | 942
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 | 84,040 | 132,703
Common equity securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value | 98 | 110
Interest rate floor - other assets |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value |  | 1
Interest rate swap-other assets |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value | 19,278 | 21,794
Interest rate swap-other liabilities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Liabilities measured at fair value | (18,808) | (21,466)
Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value | 184,155 | 180,407
Level 1 | U.S. Treasury securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value | 184,057 | 180,297
Level 1 | Common equity securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value | 98 | 110
Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value | 214,870 | 297,406
Level 2 | U.S. government-sponsored enterprises |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value | 2,152 | 16,370
Level 2 | State and municipals, Taxable |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value | 57,100 | 55,358
Level 2 | State and municipals, Tax-exempt |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value | 67,124 | 88,407
Level 2 | Corporate Debt Securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value | 3,730 | 3,626
Level 2 | Mortgage-backed Securities, U.S. Government agencies |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value | 724 | 942
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 | 84,040 | 132,703
Level 2 | Interest rate floor - other assets |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value |  | 1
Level 2 | Interest rate swap-other assets |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value | 19,278 | 21,794
Level 2 | Interest rate swap-other liabilities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Liabilities measured at fair value | $ (18,808) | (21,466)
Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value |  |
Level 3 | Corporate Debt Securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value |  |
Level 3 | Common equity securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value |  |
Level 3 | Interest rate floor - other assets |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value |  |
Level 3 | Interest rate swap-other assets |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Assets measured at fair value |  |
Level 3 | Interest rate swap-other liabilities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Liabilities measured at fair value |  |

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