Marketable Securities (Tables)

6 Months Ended

Sep. 26, 2015

Marketable Securities [Abstract]

Schedule of Available-for-sale Securities

							Estimated
			Gross		Gross		Fair Value
	Amortized		Unrealized		Unrealized		(Net Carrying
As of September 26, 2015	Cost		Gains		Losses		Amount)
Corporate debt securities	$	97,501	$	8	$	(163)	$	97,346
U.S. Treasury securities		11,504		3		-		11,507
Commercial paper		-		-		-		-
Total securities	$	109,005	$	11	$	(163)	$	108,853

The Company’s specifically identified gross unrealized losses of $163 thousand relate to 26 different securities with total amortized cost of approximately $79.6 million at September 26, 2015.  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 26, 2015.  Further, the securities with gross unrealized losses had been in a continuous unrealized loss position for less than 12 months as of September 26, 2015. 

The following table is a summary of available-for-sale securities at March 28, 2015 (in thousands):

							Estimated
			Gross		Gross		Fair Value
	Amortized		Unrealized		Unrealized		(Net Carrying
As of March 28, 2015	Cost		Gains		Losses		Amount)
Corporate debt securities	$	153,896	$	8	$	(68)	$	153,836
U.S. Treasury securities		28,010		-		(15)		27,995
Commercial paper		2,485		2		-		2,487
Total securities	$	184,391	$	10	$	(83)	$	184,318

Schedule of Cost and Estimated Fair Value of Available-for-sale Securities by Contractual Maturity

	September 26, 2015				March 28, 2015
	Amortized		Estimated		Amortized		Estimated
	Cost		Fair Value		Cost		Fair Value
Within 1 year	$	86,488	$	86,460	$	124,275	$	124,246
After 1 year		22,517		22,393		60,116		60,072
Total	$	109,005	$	108,853	$	184,391	$	184,318