Marketable Securities (Tables)

9 Months Ended

Dec. 27, 2014

Marketable Securities [Abstract]

Schedule of Available-for-sale Securities

							Estimated
			Gross		Gross		Fair Value
	Amortized		Unrealized		Unrealized		(Net Carrying
As of December 27, 2014	Cost		Gains		Losses		Amount)
Corporate debt securities	$	81,551	$	11	$	(92)	$	81,470
Commercial paper		11,498		4		(7)		11,495
U.S. Treasury securities		16,505		-		(5)		16,500
Total securities	$	109,554	$	15	$	(104)	$	109,465

The Company’s specifically identified gross unrealized losses of $104 thousand relates to 26 different securities with total amortized cost of approximately $104.6 million at December 27, 2014.  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 December 27, 2014.  Further, the securities with gross unrealized losses had been in a continuous unrealized loss position for less than 12 months as of December 27, 2014. 

The following table is a summary of available-for-sale securities at March 29, 2014 (in thousands):

							Estimated
			Gross		Gross		Fair Value
	Amortized		Unrealized		Unrealized		(Net Carrying
As of March 29, 2014	Cost		Gains		Losses		Amount)
Corporate debt securities	$	246,878	$	52	$	(245)	$	246,685
U.S. Treasury securities		56,986		10		(2)		56,994
Agency discount notes		2,008		1		-		2,009
Commercial paper		41,962		10		(2)		41,970
Certificates of deposit		5,006		-		(4)		5,002
Total securities	$	352,840	$	73	$	(253)	$	352,660

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

	December 27, 2014				March 29, 2014
	Amortized		Estimated		Amortized		Estimated
	Cost		Fair Value		Cost		Fair Value
Within 1 year	$	106,136	$	106,061	$	263,418	$	263,417
After 1 year		3,418		3,404		89,422		89,243
Total	$	109,554	$	109,465	$	352,840	$	352,660