SEGMENT AND GEOGRAPHIC INFORMATION: Concentration (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Wal-Mart | Net product sales | A major customer
Concentration of Risk
Revenues from a major customer (as a percent)	23.70%	23.70%	23.80%
McLane
Concentration of Risk
Revenues from a major customer (as a percent)	16.70%	15.30%
McLane | Net product sales | A major customer
Concentration of Risk
Revenues from a major customer (as a percent)			15.10%