SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Foreign Export Sales (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Export | Minimum
Description of Business and Foreign Export Sales
Term under credit arrangement	30 days
Export | Maximum
Description of Business and Foreign Export Sales
Term under credit arrangement	90 days
Sales Revenue, Segment | Customer Concentration Risk | Export
Description of Business and Foreign Export Sales
Percentage of net sales and trade receivable	31.00%	28.00%
Trade Accounts Receivable | Credit Concentration Risk
Description of Business and Foreign Export Sales
Percentage of net sales and trade receivable	25.50%	23.60%