Summary of Quarterly Financial Data (unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Summary of Quarterly Financial Data (unaudited) [Abstract]
Net sales	$ 230,854	$ 263,689	$ 207,391	$ 258,237	$ 220,559	$ 246,817	$ 205,219	$ 262,383	$ 960,171	$ 934,978	$ 743,203
Gross profit	140,521	166,420	131,398	163,416	139,947	160,729	131,571	164,299	601,755	596,546	470,345
Operating income	9,655	30,699	15,107	35,227	19,414	40,225	25,852	34,296	90,688	119,787	90,453
Net income	$ 6,425	$ 20,259	$ 9,926	$ 23,471	$ 12,495	$ 26,209	$ 16,973	$ 22,417	$ 60,081	$ 78,094	$ 60,478
Net income per share – diluted	$ 0.12	$ 0.36	$ 0.18	$ 0.42	$ 0.22	$ 0.46	$ 0.30	$ 0.39	$ 1.08	$ 1.37	$ 1.07