Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 04, 2015	Sep. 28, 2014	Oct. 04, 2015	Sep. 28, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 104,112	$ 50,400	$ 168,328	$ 94,854
Cash flow hedges:
Change in net unrealized gain (loss), net of tax of ($3) and $4 in the three-month periods and net of tax of ($28) and ($2) in the nine-month periods, respectively	(140)	62	(423)	(173)
Reclassification of net realized loss into current operations	90	44	269	101
Net change related to cash flow hedges	(50)	106	(154)	(72)
Available-for-sale investments:
Change in net unrealized gain (loss), net of tax of ($61) and ($49) in the three-month periods and net of tax of ($55) and $133 in the nine-month periods, respectively	(666)	(120)	(100)	1,441
Reclassification of net realized gain into current operations	(19)	(45)	(240)	(651)
Net change related to available-for-sale investments	(685)	(165)	(340)	790
Foreign currency translation adjustments:
Change in currency translation adjustments, net of tax of $4 and ($441) in the three-month periods and net of tax of ($525) and ($501) in the nine-month periods, respectively	620	(4,540)	(7,620)	(4,639)
Other comprehensive income (loss), net of tax	(115)	(4,599)	(8,114)	(3,921)
Total comprehensive income	$ 103,997	$ 45,801	$ 160,214	$ 90,933