Summary of Quarterly Financial Data (unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Jan. 02, 2016	Oct. 03, 2015	Jul. 04, 2015	Apr. 04, 2015	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Summary of Quarterly Financial Data (unaudited) [Abstract]
Net sales	$ 313,445	$ 367,988	$ 276,878	$ 352,980	$ 214,682	$ 373,919	$ 275,289	$ 349,809	$ 1,311,291	$ 1,213,699	$ 1,156,757
Gross profit	197,482	232,343	171,261	209,074	120,743	233,636	170,539	215,833	810,160	740,751	706,850
Operating income (loss)	15,312	39,044	2,396	19,898	(30,657)	45,399	16,629	43,725	76,650	75,096	101,746
Net income (loss)	$ 11,287	$ 25,745	$ 1,416	$ 12,969	$ (21,172)	$ 31,854	$ 11,038	$ 28,799	$ 51,417	$ 50,519	$ 67,974
Net income (loss) per share – diluted	$ 0.25	$ 0.56	$ 0.03	$ 0.27	$ (0.42)	$ 0.62	$ 0.21	$ 0.54	$ 1.10	$ 0.97	$ 1.25