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BENEFIT PLANS, Weighted-average Assumptions Used to Determine Benefit Obligations (Details)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
May 12, 2017
Pension Benefits [Member]      
Weighed average assumption used in calculating benefit obligations [Abstract]      
Discount rate 4.00% 4.50% 4.40%
Expected return on plan assets 7.00% 7.00%  
Rate of compensation increase 3.50% 3.50%  
Post-retirement Benefits [Member]      
Weighed average assumption used in calculating benefit obligations [Abstract]      
Discount rate 4.00% 4.40%