Unaudited Condensed Consolidated Statement of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012
Net income	$ 15,343	$ 25,147
Other comprehensive income (loss), before tax:
Unrealized gain (loss) on derivative instruments	151	(56)
Unrealized loss on available-for-sale securities	(26)	(34)
Other comprehensive income (loss), before tax	125	(90)
Tax benefit related to items of other comprehensive income	10	12
Other comprehensive income (loss), net of tax	135	(78)
Comprehensive income	$ 15,478	$ 25,069