ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES - Income statement (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net sales	$ 155,353	$ 135,257
Cost of goods sold	78,726	78,068
Gross profit	76,627	57,189
Selling, General and Administrative Expense	67,843	53,945
Operating income	8,784	3,244
Interest expense	(6,067)	(8,126)
Other income	63	(18)
Income (loss) before income taxes	2,780	(4,900)
Income tax (expense) benefit	(613)	1,639
Net income (loss)	2,167	$ (3,261)
Impact of Adoption
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net sales	(4,044)
Cost of goods sold	(1,644)
Gross profit	(2,400)
Selling, General and Administrative Expense	152
Operating income	(2,552)
Income (loss) before income taxes	(2,552)
Income tax (expense) benefit	626
Net income (loss)	(1,926)
Balances without Adoption of ASC 606
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net sales	151,309
Cost of goods sold	77,082
Gross profit	74,227
Selling, General and Administrative Expense	67,995
Operating income	6,232
Interest expense	(6,067)
Other income	63
Income (loss) before income taxes	228
Income tax (expense) benefit	13
Net income (loss)	$ 241