Marketable Securities (Tables)

12 Months Ended

Mar. 28, 2015

Marketable Securities [Abstract]

Schedule of Available-for-sale Securities

							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
Commercial paper		2,485		2		-		2,487
U.S. Treasury securities		28,010		-		(15)		27,995
Total securities	$	184,391	$	10	$	(83)	$	184,318

The Company’s specifically identified gross unrealized losses of $83 thousand relates to 34 different securities with a total amortized cost of approximately $154.3 million at March 28, 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 March 28, 2015.  Further, the securities with gross unrealized losses had been in a continuous unrealized loss position for less than 12 months as of March 28, 2015.

							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

	March 28, 2015				March 29, 2014
	Amortized		Estimated		Amortized		Estimated
	Cost		Fair Value		Cost		Fair Value
Within 1 year	$	124,275	$	124,246	$	263,418	$	263,417
After 1 year		60,116		60,072		89,422		89,243
Total	$	184,391	$	184,318	$	352,840	$	352,660