Investments (Tables)

9 Months Ended

Jan. 01, 2012

Investments, Debt and Equity Securities [Abstract]

Available-for-sale investments at January 1, 2012 were as follows:

(in thousands)	Cost			Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
U.S. government treasuries and agency securities	$	157,256		$	25	$	(2	)	$	157,279
Corporate commercial paper		8,494			---		---			8,494
Corporate bonds		38,123			36		(71	)		38,088
Money market funds		61,259			---		---			61,259
Bank deposits		22,133			---		---			22,133
Municipal bonds		578			2		---			580
Total available-for-sale investments		287,843			63		(73	)		287,833
Less amounts classified as cash equivalents		(83,638	)		---		5			(83,633	)
Short-term investments	$	204,205		$	63	$	(68	)	$	204,200

Available-for-sale investments at April 3, 2011 were as follows:

(in thousands)	Cost			Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
U.S. government treasuries and agency securities	$	119,917		$	17	$	(8	)	$	119,926
Corporate commercial paper		51,785			---		---			51,785
Corporate bonds		57,001			104		(18	)		57,087
Money market funds		32,203			---		---			32,203
Bank deposits		17,764			---		---			17,764
Municipal bonds		368			1		---			369
Total available-for-sale investments		279,038			122		(26	)		279,134
Less amounts classified as cash equivalents		(84,623	)		---		1			(84,622	)
Short-term investments	$	194,415		$	122	$	(25	)	$	194,512

Contractual Maturity of Available-For-Sale Debt Securities

The amortized cost and estimated fair value of available-for-sale securities at January 1, 2012, by contractual maturity, were as follows:

(in thousands)	Amortized Cost		Estimated Fair Value
Due in 1 year or less	$	272,059	$	272,083
Due in 1-2 years		13,798		13,775
Due in 2-5 years		1,986		1,975
Total investments in available-for-sale debt securities	$	287,843	$	287,833

Gross Unrealized Losses and Fair Value of Investments in Continuous Loss Position

The following table shows the gross unrealized losses and fair value of the Company's investments with unrealized losses as of January 1, 2012, aggregated by length of time that individual securities have been in a continuous loss position.

	Less Than 12 Months					12 Months or Greater				Total
(in thousands)	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Corporate bonds	$	16,146	$	(64	)	$	---	$	---	$	16,146	$	(64	)
U.S. government treasuries and agency securities		39,663		(10	)		---		---		39,663		(10	)
Total	$	55,809	$	(74	)	$	---	$	---	$	55,809	$	(74	)

The following table shows the gross unrealized losses and fair value of the Company's investments with unrealized losses as of April 3, 2011, aggregated by length of time that individual securities have been in a continuous loss position.

	Less Than 12 Months					12 Months or Greater				Total
(in thousands)	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Corporate bonds	$	24,176	$	(18	)	$	---	$	---	$	24,176	$	(18	)
U.S. government treasuries and agency securities		36,531		(8	)		---		---		36,531		(8	)
Total	$	60,707	$	(26	)	$	---	$	---	$	60,707	$	(26	)