Fair Value of Financial Instruments (Tables)

9 Months Ended

Dec. 29, 2012

Fair Value Of Financial Instruments [Abstract]

Schedule Of Fair Value Of Financial Assets

	Quoted Prices
	in Active		Significant
	Markets for		Other		Significant
	Identical		Observable		Unobservable
	Assets		Inputs		Inputs
	Level 1		Level 2		Level 3		Total
Cash equivalents
Money market funds	$	52,883	$	-	$	-	$	52,883
Commercial paper		-		3,999		-		3,999
	$	52,883	$	3,999	$	-	$	56,882
Available-for-sale securities
Corporate debt securities	$	-	$	19,456	$	-	$	19,456
U.S. Treasury securities		17,192		-		-		17,192
Agency discount notes		-		2,000		-		2,000
Commercial paper		-		22,069		-		22,069
	$	17,192	$	43,525	$	-	$	60,717

	Quoted Prices
	in Active		Significant
	Markets for		Other		Significant
	Identical		Observable		Unobservable
	Assets		Inputs		Inputs
	Level 1		Level 2		Level 3		Total
Cash equivalents
Money market funds	$	40,557	$	-	$	-	$	40,557
Commercial paper		-		15,952		-		15,952
Corporate debt securities		-		1,112		-		1,112
	$	40,557	$	17,064	$	-	$	57,621
Available-for-sale securities
Corporate debt securities	$	-	$	48,025	$	-	$	48,025
U.S. Treasury securities		30,261		-		-		30,261
Agency discount notes		-		16,796		-		16,796
Commercial paper		-		23,709		-		23,709
	$	30,261	$	88,530	$	-	$	118,791