Fair Value Measurements - Rollforward of Level 3 Assets (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	$ 0	$ 5,166
Sales	0	(6,450)
Reclassifications out of accumulated other comprehensive income	0	(1,445)
Balance at end of period	0	0
Auction Rate Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	0	5,166
Sales	0	(5,967)
Reclassifications out of accumulated other comprehensive income	0	(1,445)
Balance at end of period	0	0
Preferred Stock
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	0	0
Sales	0	(483)
Reclassifications out of accumulated other comprehensive income	0	0
Balance at end of period	0	0
Non-operating income (expense)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Realized gains, included in non-operating income (expense)	0	2,729
Non-operating income (expense) | Auction Rate Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Realized gains, included in non-operating income (expense)	0	2,246
Non-operating income (expense) | Preferred Stock
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Realized gains, included in non-operating income (expense)	$ 0	$ 483