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EMPLOYEE BENEFIT PLANS - Estimated Benefit Payments (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
Pension Plans  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
2020 $ 370
2021 358
2022 371
2023 357
2024 - 2029 1,924
Postretirement Benefits  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
2020 98
2021 103
2022 76
2023 103
2024 - 2029 $ 658