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Comprehensive Income (Narrative) (Details) (USD $)
Dec. 31, 2011
Dec. 25, 2010
Comprehensive Income [Abstract]    
Accumulated other comprehensive income as reported as a component of equity $ 727,000 $ 881,000
Unrealized net gain on translation of financial statements 219,000  
Cumulative unrealized holding gains on available-for-sale investments, net of income taxes $ 508,000