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EMPLOYEE BENEFIT PLANS - Fair Value Measurements (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Investments at Net Asset Value: |  |
Separate Investment Accounts | $ 54,750 | $ 62,843
Pension Benefits (a) |  |
Investments at Net Asset Value: |  |
Separate Investment Accounts | $ 54,750 | $ 62,843

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