CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Income Statement [Abstract]
Net sales	$ 174,412	$ 155,353
Cost of goods sold	81,954	78,726
Gross profit	92,458	76,627
Selling, general, and administrative expenses	76,296	67,843
Operating income	16,162	8,784
Interest expense	(3,110)	(6,067)
Other (expense) income	(1,838)	63
Income before income taxes	11,214	2,780
Income tax expense	(2,734)	(613)
Net income	$ 8,480	$ 2,167
Net income per share
Basic (in dollars per share)	$ 0.10	$ 0.03
Diluted (in dollars per share)	$ 0.10	$ 0.03
Weighted-average common shares outstanding
Basic (in shares)	86,830	84,196
Diluted (in shares)	87,461	85,857