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BENEFIT PLANS, Estimated Future Benefit Payments (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Pension Benefits [Member]  
Estimated Future Benefit Payments [Abstract]  
2019 $ 9,250
2020 9,547
2021 10,142
2022 10,607
2023 11,092
2024-2028 59,372
Post-retirement Benefits [Member]  
Estimated Future Benefit Payments [Abstract]  
2019 175
2020 139
2021 136
2022 133
2023 130
2024-2028 $ 598