EMPLOYEE RETIREMENT PLANS - Assumptions - Tabular Disclosure (Details) - Defined-benefit pension plans	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Assumptions
Discount rate for obligations (as a percent)	4.00%	3.80%	4.40%
Expected return on plan assets (as a percent)	7.25%	7.25%	7.25%
Discount rate for net periodic pension cost (as a percent)	3.80%	4.40%	3.80%