Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2017	Apr. 03, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 45,655	$ 14,885
Cash flow hedges:
Net unrealized gain (loss), net of tax of ($4) and ($82) in 2017 and 2016, respectively	(71)	(577)
Reclassification of net realized (gain) loss into current operations	44	(4)
Net change related to cash flow hedges	(27)	(581)
Available-for-sale investments:
Net unrealized gain (loss), net of tax of $92 and $267 in 2017 and 2016, respectively	511	1,281
Reclassification of net realized (gain) loss into current operations	(65)	13
Net change related to available-for-sale investments	446	1,294
Foreign currency translation adjustments:
Foreign currency translation adjustments, net of tax of $0 and $329 in 2017 and 2016, respectively	2,481	5,160
Other comprehensive income (loss), net of tax	2,900	5,873
Total comprehensive income	$ 48,555	$ 20,758