Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Oct. 02, 2011	Sep. 30, 2012	Oct. 02, 2011
Net income	$ 17,805	$ 18,037	$ 51,854	$ 50,770
Other comprehensive income (loss), net of tax:
Net unrealized gain on available-for-sale investments, net of tax of $102 and $27 in the three-month periods and net of tax of $302 and $62 in the nine-month periods, respectively	201	225	730	48
Foreign currency translation adjustments, net of tax of $17 and ($495) in the three-month periods and net of tax of ($180) and ($26) in the nine-month periods, respectively	(2,905)	(13,059)	(12,086)	902
Other comprehensive income (loss)	(2,704)	(12,834)	(11,356)	950
Comprehensive income	$ 15,101	$ 5,203	$ 40,498	$ 51,720