Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014
Net income	$ 39,348	$ 36,755	$ 109,834	$ 100,318
Other comprehensive income (loss):
Unrealized holding gains (losses) on available-for-sale investments, net of tax expense (benefit) of $38, $19, $3 and ($106)	6	(194)	70	35
Foreign currency translation losses	(930)	(61)	(1,628)	(318)
Other comprehensive loss	(924)	(255)	(1,558)	(283)
Comprehensive income	$ 38,424	$ 36,500	$ 108,276	$ 100,035