Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Net income	$ 36,755	$ 29,246	$ 100,318	$ 86,452
Other comprehensive income (loss):
Unrealized holding gains (losses) on available-for-sale investments, net of tax benefit (expense) of ($19), $341, $106 and $(98)	(194)	179	35	(620)
Foreign currency translation (losses) gains	(61)	126	(318)	(384)
Other comprehensive (loss) income	(255)	305	(283)	(1,004)
Comprehensive income	$ 36,500	$ 29,551	$ 100,035	$ 85,448