Fair Value Measurement, Financial Instruments And Risk Management (Carrying And Fair Values Of Non-Current Financial Assets And Liabilities Not Measured At Fair Value On A Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 30, 2012		Dec. 25, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	$ 109,559	[1]	$ 129,594	[1]
Estimated Fair Value [Member] | Senior Secured Credit Facility [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Line of Credit, Noncurrent	42,021		52,248
Estimated Fair Value [Member] | Senior Secured Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	66,549		75,686
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Senior Secured Credit Facility [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Line of Credit, Noncurrent	42,021		52,248
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Senior Secured Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	$ 66,114		$ 75,000

[1] The weighted average interest rates for 2012 and 2011 were 5.9% and 4.0%, respectively