RETIREMENT ANNUITY AND GUARANTEED CONTINUOUS EMPLOYMENT PLANS (Weighted Average Assumptions Used to Measure the Net Periodic Benefit Cost) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
General Discussion of Pension and Other Postretirement Benefits [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.50%	4.10%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	2.70%	2.80%
Weighted average assumptions used to measure the net periodic benefit cost
Discount rate	4.00%	4.70%	3.80%
Rate of increase in compensation	2.70%	4.10%	4.10%
Expected return on plan assets	6.30%	7.30%	7.40%