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EMPLOYEE BENEFIT PLANS - Schedule of Expected Benefit Payments (Details)
$ in Thousands
Dec. 31, 2017
USD ($)
Pension Plans  
Defined Benefit Plan Disclosure [Line Items]  
2018 $ 342
2019 368
2020 392
2021 422
2022 439
2023-2036 2,316
Non-qualified Supplemental Executive Retirement Plan  
Defined Benefit Plan Disclosure [Line Items]  
2018 378
2019 378
2020 293
2021 260
2022 260
2023-2036 $ 2,778