STOCK-BASED COMPENSATION PLANS - Inputs to Model the Value of Options Granted (Details) - Stock Options	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Assumptions used in valuation
Risk-free interest rate (as a percent)	1.90%	1.80%
Expected years to exercise	5 years	5 years
Expected volatility (as a percent)	42.10%	47.60%
Annual dividend yield (as a percent)	2.00%	2.30%