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BENEFIT PLANS, Assumptions (Details)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Pension Plan [Member]      
Weighted-average assumptions used to determine net periodic benefit cost [Abstract]      
Discount rate 4.58%   4.93%
Expected long-term return on plan assets     6.00%
SERP [Member]      
Weighted-average assumptions used to determine net periodic benefit cost [Abstract]      
Discount rate   4.09% 4.96%
Rate of compensation increase   3.50% 3.50%
Weighted-average assumptions used to determine benefit obligations [Abstract]      
Discount rate 4.30% 4.58%  
Rate of compensation increase   3.50%