REVENUE, Revenue Recognition (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) Substream	Mar. 31, 2017 USD ($)
Revenue from Contract with Customer, Excluding Assessed Tax [Abstract]
Total revenue	$ 161,410	$ 137,728
Domestic Revenue [Member]
Revenue from Contract with Customer, Excluding Assessed Tax [Abstract]
Total revenue	120,668	106,300
Foreign Revenue [Member]
Revenue from Contract with Customer, Excluding Assessed Tax [Abstract]
Total revenue	40,742	31,428
Product Sales Revenue [Member]
Revenue from Contract with Customer, Excluding Assessed Tax [Abstract]
Total revenue	$ 159,955	136,348
Number of sub-streams of revenue | Substream	3
Product Sales [Member]
Revenue from Contract with Customer, Excluding Assessed Tax [Abstract]
Total revenue	$ 148,782	124,623
Co-manufacturing [Member]
Revenue from Contract with Customer, Excluding Assessed Tax [Abstract]
Total revenue	8,839	10,099
Bill and Hold [Member]
Revenue from Contract with Customer, Excluding Assessed Tax [Abstract]
Total revenue	1,289	983
Consignment [Member]
Revenue from Contract with Customer, Excluding Assessed Tax [Abstract]
Total revenue	1,045	643
Royalty Revenue [Member]
Revenue from Contract with Customer, Excluding Assessed Tax [Abstract]
Total revenue	$ 1,455	$ 1,380