Fair Value Measurements (Tables)

6 Months Ended

Oct. 02, 2011

Fair Value Measurements [Abstract]

Schedule Of Assets Measured At Fair Value On A Recurring Basis

	Fair Value Measurements Using
	Level 1		Level 2		Level 3		Total
	(In thousands)
October 2, 2011
Cash and cash equivalents	$	71,655	$	2,999	$	—	$	74,654
Marketable securities:
U.S. government and agency securities		84,981		—		—		84,981
Corporate debt obligations		—		178,354		—		178,354
Asset and mortgage-backed securities		—		29,889		—		29,889
Municipal bonds		—		21,182		—		21,182
Non-U.S. government and agency securities		—		1,652		—		1,652
Certificates of deposit		209		—		—		209
		85,190		231,077		—		316,267
	$	156,845	$	234,076	$	—	$	390,921
April 3, 2011
Cash and cash equivalents	$	146,281	$	1,499	$	—	$	147,780
Marketable securities:
U.S. government and agency securities		55,753		—		—		55,753
Corporate debt obligations		—		138,436		—		138,436
Asset and mortgage-backed securities		—		22,490		—		22,490
Municipal bonds		—		17,941		—		17,941
Non-U.S. government and agency securities		—		1,676		—		1,676
		55,753		180,543		—		236,296
	$	202,034	$	182,042	$	—	$	384,076