REVENUE - Schedule of Disaggregation of Revenues (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) revenue_sub-stream	Jun. 30, 2018 USD ($)
Revenue [Abstract]
Net sales	$ 161,554	$ 163,687	$ 318,583	$ 325,097
United States
Revenue [Abstract]
Net sales	122,189	125,019	240,300	245,687
Foreign Countries
Revenue [Abstract]
Net sales	39,365	38,668	78,283	79,410
Product Sales Revenue
Revenue [Abstract]
Net sales	160,475	162,770	$ 316,425	322,725
Number of sub-streams of revenue | revenue_sub-stream			4
Product Sales
Revenue [Abstract]
Net sales	152,066	152,791	$ 300,016	305,450
Co-manufacturing
Revenue [Abstract]
Net sales	6,609	8,091	13,201	13,053
Bill and Hold
Revenue [Abstract]
Net sales	1,269	1,555	2,126	2,844
Consignment
Revenue [Abstract]
Net sales	531	333	1,082	1,378
Royalty Revenue
Revenue [Abstract]
Net sales	$ 1,079	$ 917	$ 2,158	$ 2,372