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BUSINESS COMBINATIONS - PCD Loans (Details) - USD ($) $ in Thousands |  | 3 Months Ended
--- | --- | ---
Jan. 02, 2025 | Mar. 31, 2025
Business Acquisition [Line Items] |  |
ACL on PCD loans |  | $ (3,071)
Financial Asset Acquired with Credit Deterioration |  |
Business Acquisition [Line Items] |  |
Unpaid principal balance of acquired PCD loans | $ 103,048 |
ACL on PCD loans | (3,071) |
Interest and liquidity discount | (9,407) |
Fair value of acquired PCD loans | 90,570 |
Financial Asset Acquired and No Credit Deterioration |  |
Business Acquisition [Line Items] |  |
Unpaid principal balance of acquired PCD loans | 769,036 |
ACL on PCD loans | (6,243) |
Interest and liquidity discount | (80,771) |
Fair value of acquired PCD loans | 682,022 |
Northway Financial, Inc "NFI" |  |
Business Acquisition [Line Items] |  |
ACL on PCD loans | $ (3,100) |

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