Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2020	Jun. 29, 2019	Jul. 04, 2020	Jun. 29, 2019
Income Statement [Abstract]
Net sales	$ 202,783	$ 198,570	$ 422,987	$ 372,307
Cost of sales	128,320	125,630	267,397	238,097
Gross profit	74,463	72,940	155,590	134,210
Selling, general and administrative expenses	53,969	44,026	108,189	88,040
Impairment of trade name	8,000		8,000
Restructuring costs and charges	3,906		3,906
Income from operations	8,588	28,914	35,495	46,170
Interest expense, net	6,856	6,756	14,025	13,470
Income before income taxes	1,732	22,158	21,470	32,700
Income tax (benefit) expense	(467)	5,113	3,671	7,398
Net income	$ 2,199	$ 17,045	$ 17,799	$ 25,302
Net income per common share:
Basic	$ 0.04	$ 0.29	$ 0.30	$ 0.43
Diluted	$ 0.04	$ 0.29	$ 0.30	$ 0.43
Weighted average shares outstanding:
Basic	58,943	58,394	58,806	58,264
Diluted	59,140	59,291	59,147	59,248