REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 294,603	$ 229,125	$ 715,953	$ 616,132
Sales Revenue | Customer Concentration Risk | One customer
Disaggregation of Revenue [Line Items]
Customer concentration		15.00%		16.00%
United States
Disaggregation of Revenue [Line Items]
Net sales	274,421	$ 221,501	676,553	$ 591,147
International
Disaggregation of Revenue [Line Items]
Net sales	20,182	7,624	39,400	24,985
Coolers & Equipment
Disaggregation of Revenue [Line Items]
Net sales	124,155	97,843	312,259	266,551
Drinkware
Disaggregation of Revenue [Line Items]
Net sales	165,934	126,368	392,877	334,278
Other
Disaggregation of Revenue [Line Items]
Net sales	4,514	4,914	10,817	15,303
Wholesale
Disaggregation of Revenue [Line Items]
Net sales	144,191	136,198	352,898	378,982
Direct-to-consumer
Disaggregation of Revenue [Line Items]
Net sales	$ 150,412	$ 92,927	$ 363,055	$ 237,150