Marketable Securities (Tables)

6 Months Ended

Sep. 28, 2013

Schedule Of Available-for-sale Securities



							Estimated
			Gross		Gross		Fair Value
	Amortized		Unrealized		Unrealized		(Net Carrying
As of September 28, 2013	Cost		Gains		Losses		Amount)
Corporate debt securities	$	152,099	$	55	$	(26)	$	152,128
U.S. Treasury securities		42,579		14		-		42,593
Agency discount notes		4,021		3		-		4,024
Commercial paper		40,912		20		-		40,932
Total securities	$	239,611	$	92	$	(26)	$	239,677

The Company’s specifically identified gross unrealized losses of $26 thousand relates to 34 different securities with total amortized cost of approximately $77.4 million at September 28, 2013. Because the Company does not intend to sell the investments at a loss and the Company will not be required to sell the investments before recovery of its amortized cost basis, it did not consider the investment in these securities to be other-than-temporarily impaired at September 28, 2013. Further, the securities with gross unrealized losses had been in a continuous unrealized loss position for less than 12 months as of September 28, 2013.

The following table is a summary of available-for-sale securities at March 30, 2013 (in thousands):



							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

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



	September 28, 2013				March 30, 2013
	Amortized		Estimated		Amortized		Estimated
	Cost		Fair Value		Cost		Fair Value
Within 1 year	$	199,375	$	199,423	$	105,290	$	105,235
After 1 year		40,236		40,254		65,004		64,910
Total	$	239,611	$	239,677	$	170,294	$	170,145