SUPPLEMENTARY QUARTERLY FINANCIAL DATA (Details) (USD $)	3 Months Ended									12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012		Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Quarterly Financial Information Disclosure [Abstract]
Number of weeks in fiscal year										P52W	P52W	P52W
Net revenues	$ 204,179,000	$ 197,402,000	[1]	$ 179,280,000	$ 181,365,000	$ 177,584,000	$ 183,236,000	$ 176,948,000	$ 175,600,000	$ 762,226,000	$ 713,368,000	$ 683,602,000
Gross Profit	106,093,000	102,164,000	[1]	97,228,000	97,696,000	95,115,000	96,212,000	98,966,000	94,058,000	403,181,000	384,351,000	361,756,000
Net income	28,709,000	28,206,000	[1]	25,924,000	23,563,000	23,886,000	30,898,000	27,521,000	26,731,000	106,402,000	109,036,000	109,243,000
Earnings per Common Share - Basic	$ 0.68	$ 0.68	[1]	$ 0.62	$ 0.57	$ 0.57	$ 0.73	$ 0.62	$ 0.57	$ 2.55	$ 2.48	$ 2.29
Earnings per Common Share - Diluted	$ 0.67	$ 0.66	[1]	$ 0.61	$ 0.55	$ 0.55	$ 0.71	$ 0.60	$ 0.56	$ 2.49	$ 2.41	$ 2.21
Cash dividends declared per common share	$ 0.10	$ 0.10	[1]	$ 0.10	$ 0.10	$ 0.05	$ 0.05	$ 0.05	$ 0.05	$ 0.40	$ 0.2	$ 0.2
Restructuring and other related charges incurred during fiscal year 2013		$ 1,900,000								$ 1,900,000

[1] We initiated a restructuring plan during the third quarter of fiscal year 2013. Under the plan, we eliminated certain positions in the US., Mexico, China, and Europe, and transitioned some of these positions to lower cost locations. The pre-tax charges incurred during fiscal year 2013 included $1.9 million for severance and related benefits and an immaterial amount of accelerated amortization on leasehold assets with no alternative future use.