Fair Value (Tables)

6 Months Ended

Sep. 28, 2013

Fair Value [Abstract]

Schedule Of Assets And Liabilities Measured On A Recurring Basis

	September 28, 2013
	Fair value measurements
Assets	Level 1			Level 2		Level 3		Total
Money market funds	$	7,744	(1)	$	-	$	-	$	7,744
Municipal bonds		-			91,943		-		91,943
Corporate bonds		-			33,468		-		33,468
Certificates of deposits		7,120			998		-		8,118
Commercial paper		-			749		-		749
Equity mutual funds related to NQDCP		10,193			-		-		10,193
Auction Rate Securities		-			2,100		-		2,100
Total assets at fair value	$	25,057		$	129,258	$	-	$	154,315
Liabilities
Obligation related to NQDCP	$	10,193		$	-	$	-	$	10,193
	March 30, 2013
	Fair value measurements
Assets	Level 1			Level 2		Level 3		Total
Money market funds	$	13,476	(1)	$	-	$	-	$	13,476
Municipal bonds		-			58,658		-		58,658
Corporate bonds		-			25,825		-		25,825
Government agency bonds		-			16,187		-		16,187
Certificate of deposits		3,459			4,300		-		7,759
Commercial Papers					5,745				5,745
Equity mutual funds related to NQDCP		9,673			-		-		9,673
Long-term investments in ARS		-			-		13,800		13,800
Total assets at fair value	$	26,608		$	110,715	$	13,800	$	151,123
Liabilities
Obligation related to NQDCP	$	9,673		$	-	$	-	$	9,673

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(1) Money market funds of $7,744,000 and $13,476,000 were classified as cash equivalents as of September 28, 2013 and March 30, 2013, respectively.

Schedule Of Level 3 Assets

	Three Months Ended				Six Months Ended
	September 28,		September 29,		September 28,		September 29,
	2013		2012		2013		2012
Beginning balance of ARS classified as Level 3	$	1,900	$	13,600	$	13,800	$	25,900
Redemption of investments in ARS at par		-		-		(12,950)		(12,750)
Reversals of unrealized losses due to redemptions		-		-		970		-
Change in fair value of existing ARS		200		100		280		550
Reclassified to Level 2		(2,100)		-		(2,100)		-
Ending balance of ARS classified as Level 3	$	-	$	13,700	$	-	$	13,700