Consolidated Statement of Comprehensive Income Statement (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Statement of Comprehensive Income [Abstract]
Net Income	$ 11,771	$ 5,040	$ 23,755	$ 6,930
Unrealized loss related to marketable securities, net	(19)	(84)	(70)	(232)
Realized gain on sale of auction rate securities, previously unrealized, net of tax	(1,147)	0	(1,147)	0
Less: reclassification adjustment for losses included in other income (expense), net	108	229	99	302
Translation adjustment	914	(265)	738	(430)
Comprehensive Income	$ 11,627	$ 4,920	$ 23,375	$ 6,570