BASIS OF PRESENTATION (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2013
Number of weeks in fiscal year			P52W		P52W
Quarter to date number of weeks in fiscal quarter	P13W	P13W
Year to date number of weeks in fiscal quarter			P39W	P39W
Cost of revenues	$ 102,412	$ 95,238	$ 293,964	$ 260,959
Net income	34,383	28,206	84,474	77,693
Error Related to Estimated Warranty Obligation and Return Material Authorization [Member]
Net income	2,100
Cost of revenues [Member] | Error Related to Estimated Warranty Obligation and Return Material Authorization [Member]
Cost of revenues	$ 2,400