SUMMARY OF QUARTERLY DATA (UNAUDITED) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 31, 2012	Dec. 31, 2011	Oct. 01, 2011	Jul. 02, 2011	Apr. 02, 2011	Jan. 01, 2011	Oct. 02, 2010	Jul. 03, 2010	Mar. 31, 2012	Apr. 02, 2011	Apr. 03, 2010
Quarterly Financial Data [Abstract]
Net revenues	$ 186,670	$ 191,160	$ 179,445	$ 170,569	$ 170,033	$ 176,789	$ 166,833	$ 163,039	$ 727,844	$ 676,694	$ 645,430
Gross profit	94,612	95,931	89,949	88,748	87,501	93,490	87,755	86,463	369,240	355,209	337,481
Operating income	20,960	25,324	18,566	23,908	28,895	28,559	28,905	24,189	88,758	110,548	83,281
Net income	$ 17,805	$ 18,254	$ 13,880	$ 16,947	$ 20,989	$ 19,734	$ 21,338	$ 17,918	$ 66,886	$ 79,980	$ 58,370
Share data:
Basic income per share (in dollars per share)	$ 0.71	$ 0.73	$ 0.55	$ 0.66	$ 0.82	$ 0.79	$ 0.86	$ 0.71	$ 2.64	$ 3.19	$ 2.29
Diluted income per share (in dollars per share)	$ 0.69	$ 0.72	$ 0.54	$ 0.65	$ 0.81	$ 0.77	$ 0.85	$ 0.70	$ 2.59	$ 3.12	$ 2.24