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PENSION PLAN (Details 9)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Defined Benefit Plan [Abstract]    
Weighted average discount rate used to determine the accrued benefit obligations 3.90% 3.40%
Discount rate used to determine the net pension expense 3.40% 3.80%
Expected long-term rate on plan assets 6.50% 6.50%