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RETIREMENT PLANS - Expected future service (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
Pension Plans  
Estimated Pension Benefits  
2020 $ 4,719
2021 4,476
2022 4,813
2023 4,339
2024 4,594
2025 - 2029 23,474
Total 46,415
Postretirement Benefits  
Estimated Pension Benefits  
2020 347
2021 320
2022 317
2023 263
2024 310
2025 - 2029 1,695
Total $ 3,252