Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 08, 2013	Sep. 09, 2012	Sep. 08, 2013	Sep. 09, 2012
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 30,632	$ 25,976	$ 98,322	$ 74,814
Other comprehensive income (loss), before tax:
Currency translation adjustment	175	(23)	85	(810)
Reclassification adjustment for losses included in net income		0		776
Other Comprehensive Income (Loss), before Tax, Total	175	(23)	85	(34)
Tax attributes of items in other comprehensive income (loss):
Currency translation adjustment	(49)	1	34	305
Reclassification adjustment for losses included in net income		0		(295)
Other Comprehensive Income (Loss), Tax	(49)	1	34	10
Other comprehensive income (loss), net of tax	126	(22)	119	(24)
Comprehensive income	$ 30,758	$ 25,954	$ 98,441	$ 74,790