REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Total net sales	$ 231,654	$ 206,288	$ 387,007	$ 341,545
Sales Revenue | Customer Concentration Risk | One customer
Disaggregation of Revenue [Line Items]
Customer concentration	17.00%	17.00%	16.00%	16.00%
United States
Disaggregation of Revenue [Line Items]
Total net sales	$ 220,978	$ 202,282	$ 369,646	$ 336,072
International
Disaggregation of Revenue [Line Items]
Total net sales	10,676	4,006	17,361	5,473
Coolers & Equipment
Disaggregation of Revenue [Line Items]
Total net sales	109,056	99,600	168,708	153,342
Drinkware
Disaggregation of Revenue [Line Items]
Total net sales	116,955	100,868	207,910	176,654
Other
Disaggregation of Revenue [Line Items]
Total net sales	5,643	5,820	10,389	11,549
Wholesale
Disaggregation of Revenue [Line Items]
Total net sales	149,176	148,781	242,784	235,773
Direct-to-consumer
Disaggregation of Revenue [Line Items]
Total net sales	$ 82,478	$ 57,507	$ 144,223	$ 105,772