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PENSION AND OTHER POSTRETIREMENT PLANS - Amounts Recognized in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items] |  |  |
Net actuarial loss | $ (34) | $ (194) | $ (475)
Pension Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Net actuarial loss | 478 | 538 |
SERP Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Net actuarial loss | $ 502 | $ 487 |

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