Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Consolidated Statements of Operations [Abstract]
Net sales	$ 743,203	$ 605,676	$ 544,202
Cost of sales	272,858	227,413	208,742
Gross profit	470,345	378,263	335,460
Sales and marketing	317,502	269,901	259,244
General and administrative	58,106	53,572	49,560
Research and development	4,175	2,147	1,973
Asset impairment charges	109	260	686
Terminated equity financing costs	0	0	3,324
Total operating expenses	379,892	325,880	314,787
Operating income	90,453	52,383	20,673
Other expense, net	33	1,893	5,983
Income before income taxes	90,420	50,490	14,690
Income tax expense (benefit)	29,942	18,922	(20,862)
Net income	$ 60,478	$ 31,568	$ 35,552
Net income per share - basic	$ 1.10	$ 0.58	$ 0.78
Weighted-average common shares - basic	55,081	54,005	45,682
Net income per share - diluted	$ 1.07	$ 0.57	$ 0.77
Weighted-average common shares - diluted	56,432	55,264	46,198