Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Income Statement [Abstract]
Net sales	$ 258,237	$ 262,383
Cost of sales	94,821	98,084
Gross profit	163,416	164,299
Operating Expenses:
Sales and marketing	109,813	106,185
General and administrative	16,181	16,929
Research and development	2,556	1,290
CEO transition (benefit) costs	(391)	5,595
Asset impairment charges	30	4
Total operating expenses	128,189	130,003
Operating income	35,227	34,296
Other income, net	91	7
Income before income taxes	35,318	34,303
Income tax expense	11,847	11,886
Net income	$ 23,471	$ 22,417
Basic net income per share:
Net income per share – basic	$ 0.43	$ 0.40
Weighted-average shares – basic	55,095	55,640
Diluted net income per share:
Net income per share – diluted	$ 0.42	$ 0.39
Weighted-average shares – diluted	56,251	57,440