Fair Value Measurement (Schedule Of Financial Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) (Fair Value Measurements Level 2 [Member], USD $) In Thousands, unless otherwise specified	Mar. 24, 2015	Dec. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan liabilities	$ (13,774)	$ (12,979)
Life Insurance Policies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan investments	$ 13,595	$ 12,760