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EMPLOYEE BENEFIT PLANS - Segregation of assets by the level of valuations inputs (Details) - Defined Benefit Pension Items - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
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Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Defined Benefit Plan, Plan Assets, Amount | $ 70,432 | $ 58,447 | $ 44,831
Cash and Cash Equivalents | Level 1 |  |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 56 | 725 |
Domestic equities. | Level 1 |  |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 8,488 | 6,219 |
International equities | Level 1 |  |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 199 | 0 |
Mutual funds/ETFs | Level 1 |  |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 59,306 | 48,009 |
Corporate bonds | Level 2 |  |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Defined Benefit Plan, Plan Assets, Amount | $ 2,383 | $ 3,494 |

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