Marketable Securities (Tables)

12 Months Ended

Mar. 30, 2013

Marketable Securities [Abstract]

Schedule Of Available-for-sale Securities

								Estimated
				Gross		Gross		Fair Value
		Amortized		Unrealized		Unrealized		(Net Carrying
As of March 30, 2013		Cost		Gains		Losses		Amount)
Corporate debt securities	$	94,798	$	2	$	(133)	$	94,667
U.S. Treasury securities		34,380		4		(3)		34,381
Agency discount notes		1,027		-		-		1,027
Commercial paper		40,089		9		(28)		40,070
Total securities	$	170,294	$	15	$	(164)	$	170,145

							Estimated
			Gross		Gross		Fair Value
	Amortized		Unrealized		Unrealized		(Net Carrying
As of March 31, 2012	Cost		Gains		Losses		Amount)
Corporate debt securities	$	48,011	$	33	$	(19)	$	48,025
U.S. Treasury securities		30,264		1		(4)		30,261
Agency discount notes		16,789		8		(1)		16,796
Commercial paper		23,719		5		(15)		23,709
Total securities	$	118,783	$	47	$	(39)	$	118,791

Schedule of Cost And Estimated Fair Value Of Available-for-sale Securities By Contractual Maturity

		March 30, 2013				March 31, 2012
		Amortized		Estimated		Amortized		Estimated
		Cost		Fair Value		Cost		Fair Value
Within 1 year	$	105,290	$	105,235	$	115,871	$	115,876
After 1 year		65,004		64,910		2,912		2,915
Total	$	170,294	$	170,145	$	118,783	$	118,791