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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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