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EMPLOYEE RETIREMENT PLANS AND POSTRETIREMENT BENEFITS - Expected Future Benefit Payments (Details)
$ in Thousands
Dec. 31, 2020
USD ($)
Expected Future Benefit Payments  
2021 $ 2,255
2022 1,972
2023 2,184
2024 2,891
2025 2,301
2026 - 2030 $ 49,098