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v3.25.3

BORROWED FUNDS - Subordinated and Junior Subordinated Borrowings (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Dec. 31, 2024 | Sep. 30, 2025 | Nov. 26, 2019
Financial guarantee |  |  |
BORROWED FUNDS |  |  |
Interest rate margin |  | 2.79% |
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] |  | us-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember |
NHTB Capital Trust II and NHTB Capital Trust III | Financial guarantee |  |  |
BORROWED FUNDS |  |  |
Debentures issued by variable interest entities |  | $ 20.6 |
Subordinated borrowings private placement |  |  |
BORROWED FUNDS |  |  |
Principal amount of debt issued |  |  | $ 40.0
Fixed interest rate |  |  | 4.63%
Interest rate margin |  | 3.27% |
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] |  | us-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember |
Repayments of subordinated debt | $ 20.0 |  |
Outstanding subordinated debt |  | $ 20.0 |
Acquired subordinated notes |  |  |
BORROWED FUNDS |  |  |
Principal amount of debt issued |  | 13.0 |
Fair value |  | $ 11.2 |
Interest rate margin |  | 4.82% |
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] |  | us-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember |
Effective interest rate |  | 4.875% |

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