FAIR VALUE (Schedule Of Assets And Liabilities Measured On A Recurring Basis) (Details) (USD $)	Mar. 30, 2013	Mar. 31, 2012		Apr. 02, 2011	Apr. 03, 2010
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total assets at fair value	$ 151,123,000	$ 153,490,000
Liabilities, Obligation related to NQDCP	9,673,000	8,650,000
Cash and cash equivalents	13,476,000	16,453,000
Fair Value Measurements, Level 1 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total assets at fair value	26,608,000	28,103,000
Liabilities, Obligation related to NQDCP	9,673,000	8,650,000
Fair Value Measurements, Level 2 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total assets at fair value	110,715,000	99,487,000
Fair Value Measurements, Level 3 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total assets at fair value	13,800,000	25,900,000
Money Market Funds [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total assets at fair value	13,476,000	16,453,000
Money Market Funds [Member] | Fair Value Measurements, Level 1 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total assets at fair value	13,476,000	16,453,000	[1]
Municipal Bonds [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total assets at fair value	58,658,000	32,268,000
Municipal Bonds [Member] | Fair Value Measurements, Level 2 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total assets at fair value	58,658,000	32,268,000
Corporate Bonds [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total assets at fair value	25,825,000	36,947,000
Corporate Bonds [Member] | Fair Value Measurements, Level 2 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total assets at fair value	25,825,000	36,947,000
Government Agency Bonds [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total assets at fair value	16,187,000	26,010,000
Government Agency Bonds [Member] | Fair Value Measurements, Level 2 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total assets at fair value	16,187,000	26,010,000
Certificates Of Deposit [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total assets at fair value	7,759,000	7,262,000
Certificates Of Deposit [Member] | Fair Value Measurements, Level 1 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total assets at fair value	3,459,000	3,000,000
Certificates Of Deposit [Member] | Fair Value Measurements, Level 2 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total assets at fair value	4,300,000	4,262,000
Commercial Papers [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total assets at fair value	5,745,000
Commercial Papers [Member] | Fair Value Measurements, Level 2 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total assets at fair value	5,745,000
Equity Mutual Funds Related to NQDCP [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total assets at fair value	9,673,000	8,650,000
Equity Mutual Funds Related to NQDCP [Member] | Fair Value Measurements, Level 1 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total assets at fair value	9,673,000	8,650,000
Long-Term Investments In ARS [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total assets at fair value	13,800,000	25,900,000
Long-Term Investments In ARS [Member] | Fair Value Measurements, Level 3 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total assets at fair value	$ 13,800,000	$ 25,900,000		$ 30,200,000	$ 65,000,000

[1] Money market funds of $13,476,000 and $16,453,000 were classified as cash equivalents as of March 30, 2013 and March 31, 2012.