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Consolidated Statements of Comprehensive Income (Unaudited) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 23, 2014
Mar. 24, 2013
Statement Of Income And Comprehensive Income [Abstract]    
Net income $ 40,474 $ 34,420
Other comprehensive income (loss), before tax:    
Currency translation adjustment (1,026) 22
Tax attributes of items in other comprehensive income (loss):    
Currency translation adjustment 442 (73)
Other comprehensive loss, net of tax (584) (51)
Comprehensive income $ 39,890 $ 34,369