Fair Value Measurements (Schedule Of Fair Value Of Assets Measured On Non-Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 28, 2012	Mar. 30, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of impaired long-lived assets held for use	$ 369	$ 255
Fair Value Measurements Using Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of impaired long-lived assets held for use	0	0
Fair Value Measurements Using Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of impaired long-lived assets held for use	0	0
Fair Value Measurements Using Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of impaired long-lived assets held for use	$ 369	$ 255