Investment Securities (Tables)

12 Months Ended

Apr. 01, 2012

Investment Securities [Abstract]

Schedule of Available-For-Sale Securities

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(In thousands)
April 1, 2012
U.S. government and agency securities	$	141,680	$	257	$	(78	)	$	141,859
Corporate debt obligations		166,763		1,071		(166	)		167,668
Asset and mortgage-backed securities		46,395		272		(73	)		46,594
Municipal bonds		16,548		22		(2	)		16,568
Other debt securities		750		—		—			750
	$	372,136	$	1,622	$	(319	)	$	373,439
April 3, 2011
U.S. government and agency securities	$	55,875	$	94	$	(216	)	$	55,753
Corporate debt obligations		137,706		1,012		(282	)		138,436
Asset and mortgage-backed securities		22,249		293		(52	)		22,490
Municipal bonds		17,941		10		(10	)		17,941
Non-U.S. government and agency securities		1,676		—		—			1,676
	$	235,447	$	1,409	$	(560	)	$	236,296

Schedule of Amortized Cost and Estimated Fair Value of Debt Securities

	Amortized Cost		Estimated Fair Value
	(In thousands)
Due in one year or less	$	71,344	$	71,702
Due after one year through three years		205,258		205,905
Due after three years through five years		45,519		45,618
Due after five years		50,015		50,214
	$	372,136	$	373,439

Schedule of Unrealized Losses by Investment Company

	Less Than 12 Months					12 Months or Greater					Total
Description of Securities	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(In thousands)
April 1, 2012
U.S. government and agency securities	$	76,239	$	(78	)	$	—	$	—		$	76,239	$	(78	)
Corporate debt obligations		66,997		(166	)		—		—			66,997		(166	)
Asset and mortgage-backed securities		12,996		(69	)		139		(4	)		13,135		(73	)
Municipal bonds		1,978		(2	)		—		—			1,978		(2	)
	$	158,210	$	(315	)	$	139	$	(4	)	$	158,349	$	(319	)
April 3, 2011
U.S. government and agency securities	$	25,712	$	(216	)	$	—	$	—		$	25,712	$	(216	)
Corporate debt obligations		60,595		(282	)		—		—			60,595		(282	)
Asset and mortgage-backed securities		7,991		(52	)		—		—			7,991		(52	)
Municipal bonds		1,866		(10	)		—		—			1,866		(10	)
	$	96,164	$	(560	)	$	—	$	—		$	96,164	$	(560	)