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EMPLOYEE BENEFIT PLANS - Investments Held in Rabbi Trusts (Details) - Rabbi Trusts - Level 1 - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Defined Benefit Plan Disclosure [Line Items] |  |
Total investments held in Rabbi Trusts | $ 96,006 | $ 82,297
Cash and Cash Equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total investments held in Rabbi Trusts | 21,457 | 24,573
Fixed income mutual funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total investments held in Rabbi Trusts | 9,648 | 10,269
United States | Equity mutual funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total investments held in Rabbi Trusts | 53,449 | 39,066
Non-U.S. | Equity mutual funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total investments held in Rabbi Trusts | $ 11,452 | $ 8,389

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