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EMPLOYEE RETIREMENT PLANS (Details 5)
$ in Thousands
Dec. 31, 2017
USD ($)
Defined Benefit Pension Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2018 $ 2,512
2019 2,651
2020 2,678
2021 2,695
2022 2,686
2023 - 2027 13,901
Supplemental Pension Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2018 416
2019 450
2020 485
2021 520
2022 566
2023 - 2027 $ 4,383