Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Statement of Comprehensive Income [Abstract]
Net income	$ 38,500	$ 58,584	$ 126,538	$ 126,074
Other comprehensive income (loss), net of tax effects:
Foreign currency translation adjustments	(5,442)	1,025	(23,308)	(3,808)
Changes in unrealized holding gains or losses on available-for-sale securities, net of reclassification adjustment for realized gains and losses	177	(120)	(206)	(1,141)
Changes in defined benefit plan liabilities	66	65	448	120
Total other comprehensive income (loss), net of tax effects	(5,199)	970	(23,066)	(4,829)
Comprehensive income	$ 33,301	$ 59,554	$ 103,472	$ 121,245