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EMPLOYEE BENEFIT PLANS (Details 6) - Pension Plans, Defined Benefit [Member]
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
WEIGHTED AVERAGE ASSUMPTIONS:      
Discount rate 4.12% 4.20% 4.00%
Expected return on plan assets 7.75% 7.75% 8.00%
Rate of compensation increase 2.50% 2.50% 2.50%