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EMPLOYEE BENEFITS (Expected Benefit Payments) (Details)
$ in Thousands
Dec. 31, 2017
USD ($)
Pension Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2018 $ 5,620
2019 6,140
2020 6,780
2021 7,520
2022 8,240
2023 - 2027 52,950
Post-retirement Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2018 1,350
2019 1,540
2020 1,700
2021 1,880
2022 2,050
2023 - 2027 $ 13,310