Unaudited Condensed Consolidated Statement of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 01, 2012	Jul. 03, 2011	Jul. 01, 2012	Jul. 03, 2011
Net income	$ 21,522	$ 20,597	$ 46,669	$ 41,786
Other comprehensive income, before tax:
Unrealized gain (loss) on derivative instruments	172	94	116	(247)
Unrealized (loss) gain on available-for-sale securities	(1)	29	(35)	39
Total other comprehensive income (loss), before tax	171	123	81	(208)
Tax benefit (expense) related to items of other comprehensive income	0	(7)	12	(10)
Other comprehensive income (loss), net of tax	171	116	93	(218)
Comprehensive income	$ 21,693	$ 20,713	$ 46,762	$ 41,568