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v3.25.3

BORROWINGS (Details) - USD ($) $ in Thousands | Jan. 02, 2025 | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Repurchase Agreements |  | $ 240,367 | $ 175,621
Total short-term borrowings |  | 748,492 | 500,621
Long-term borrowings |  | $ 1,000 |
Northway Financial, Inc "NFI" |  |  |
Debt Instrument [Line Items] |  |  |
Repurchase Agreements | $ 65,500 |  |
Junior Subordinated Debt | Subsidiary One |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate |  | 5.90% |
Long-term Debt |  | $ 36,083 | 36,083
Proceeds from Issuance of Subordinated Long-Term Debt | $ 10,000 |  |
Debt Instrument, Basis Spread on Variable Rate | 0.26161% |  |
Debt Instrument, Basis Spread on Variable Rate, Additional | 1.60% |  |
Junior Subordinated Debt | Subsidiary Two |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate |  | 5.79% |
Long-term Debt |  | $ 8,248 | 8,248
Proceeds from Issuance of Subordinated Long-Term Debt | $ 10,000 |  |
Debt Instrument, Basis Spread on Variable Rate | 0.26161% |  |
Debt Instrument, Basis Spread on Variable Rate, Additional | 1.49% |  |
Junior Subordinated Debt | Subsidiary Three |  |  |
Debt Instrument [Line Items] |  |  |
Long-term Debt |  | 8,555 | 0
Junior Subordinated Debt | Subsidiary Four |  |  |
Debt Instrument [Line Items] |  |  |
Long-term Debt |  | 8,555 | 0
Subordinated Debt and Junior Subordinated Debt |  |  |
Debt Instrument [Line Items] |  |  |
Long-term Debt |  | 61,441 | 44,331
FHLBB and Correspondent Bank Overnight Borrowings |  |  |
Debt Instrument [Line Items] |  |  |
Long-term borrowings |  | 1,000 | 0
Short-term Debt [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Total short-term borrowings |  | 748,492 | 500,621
Short-term Debt [Member] | Customer Repurchase Agreements |  |  |
Debt Instrument [Line Items] |  |  |
Repurchase Agreements |  | 254,992 | 175,621
Short-term Debt [Member] | Customer Repurchase Agreements | Northway Financial, Inc "NFI" |  |  |
Debt Instrument [Line Items] |  |  |
Repurchase Agreements |  | 65,500 |
Short-term Debt [Member] | FHLBB and Correspondent Bank Overnight Borrowings |  |  |
Debt Instrument [Line Items] |  |  |
FHLBB and Correspondent Bank Overnight Borrowings |  | $ 493,500 | $ 325,000

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