Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2015	Jun. 28, 2014	Jun. 27, 2015	Jun. 28, 2014
Net income	$ 40,471	$ 35,925	$ 70,486	$ 63,563
Other comprehensive income (loss):
Unrealized holding gains (losses) on available-for-sale investments, net of tax expense (benefit) of $35, $125, ($90) and $65	(164)	119	64	229
Foreign currency translation (losses) gains	(418)	175	(698)	(257)
Other comprehensive (loss) income	(582)	294	(634)	(28)
Comprehensive income	$ 39,889	$ 36,219	$ 69,852	$ 63,535