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BUSINESS COMBINATIONS - Assets Acquired and Liabilites Assumed (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended |
--- | --- | --- | ---
Jan. 02, 2025 | Mar. 31, 2025 | Jan. 01, 2025
Financial liabilities: |  |  |
Financing Receivable, Purchased With Credit Deterioration, Credit Fair Value Discount | $ 2,000 |  |
ACL on PCD loans |  | $ (3,071) |
Financing Receivable, Purchase, Interest Rate Fair Value Discount | 96,700 |  |
Northway Financial, Inc "NFI" |  |  |
Business Acquisition [Line Items] |  |  |
Acquire amount value | 96,490 |  |
Assets |  |  |
Loans and loans held for sale(1) | 772,592 |  | $ 864,031
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Loans and loans held for sale | (91,439) |  |
Investments | 229,954 |  | 229,222
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Investments | 732 |  |
Cash and due from banks | 48,261 |  | 48,261
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Cash and due from banks | 0 |  |
Deferred tax assets | 18,650 |  | 14,006
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred tax assets | 4,644 |  |
Premises and equipment | 16,850 |  | 9,303
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment | 7,547 |  |
Core deposit intangible assets | 48,058 |  | 0
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles | 48,058 |  |
Bank-owned life insurance | 4,372 |  | 4,372
Business Combination, Provisional Information, Initial Accounting Incomplete, AdjustmentBank-owned life insurance | 0 |  |
Other assets | 15,453 |  | 14,394
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Noncurrent Assets | 1,059 |  |
Total Assets | 1,154,190 |  | 1,183,589
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Assets | (29,399) |  |
Financial liabilities: |  |  |
Deposits | 971,673 |  | 971,899
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deposits | (226) |  |
Short-term borrowings | 65,499 |  | 65,499
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments Short-term borrowings | 0 |  |
Long-term borrowings | 45,184 |  | 45,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments Long-term borrowings | 184 |  |
Junior subordinated debentures | 16,884 |  | 20,620
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Borrowings | (3,736) |  |
Other liabilities | 17,533 |  | 17,940
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Noncurrent Liabilities, Other | (407) |  |
Total Liabilities | 1,116,773 |  | 1,120,958
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Liabilities | (4,185) |  |
Total identified assets acquired and liabilities assumed, at fair value | 37,417 |  | $ 62,631
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred | (25,214) |  |
Business Combination, Acquired Receivable, Fair Value | 10,200 |  |
ACL on PCD loans | $ (3,100) |  |
Common stock closing price (in dollars per share) | $ 42.25 |  |
Number of shares issued (in shares) | 2,283,782 |  |

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