Unaudited Condensed Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015
Net income	$ 21,119	$ 15,099	$ 53,742	$ 26,777
Other comprehensive income (loss), before tax:
Unrealized gain (loss) on derivative instruments	240	10	204	(102)
Unrealized gain (loss) on available-for-sale securities	(43)	6	104	34
Other comprehensive income (loss), before tax	197	16	308	(68)
Tax expense related to items of other comprehensive income	(14)	(2)	(69)	(13)
Other comprehensive income (loss), net of tax	183	14	239	(81)
Comprehensive income	$ 21,302	$ 15,113	$ 53,981	$ 26,696