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OTHER COMMITMENTS, CONTINGENCIES, AND OFF-BALANCE SHEET ACTIVITIES (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Loss Contingencies [Line Items] |  |
Total | $ 725,655 | $ 682,838
Commitments to originate new loans |  |
Loss Contingencies [Line Items] |  |
Total | 115,563 | 71,857
Unused funds on commercial and other lines of credit |  |
Loss Contingencies [Line Items] |  |
Total | 98,993 | 202,217
Unadvanced funds on home equity lines of credit |  |
Loss Contingencies [Line Items] |  |
Total | 117,351 | 117,198
Unadvanced funds on construction and real estate loans |  |
Loss Contingencies [Line Items] |  |
Total | 168,883 | 106,935
Standby letters of credit |  |
Loss Contingencies [Line Items] |  |
Total | 3,061 | 3,481
Commercial letters of credit |  |
Loss Contingencies [Line Items] |  |
Total | $ 221,804 | $ 181,150

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