CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2015	Sep. 26, 2014	Oct. 02, 2015	Sep. 26, 2014
Net income (loss)	$ (4,811)	$ 1,078	$ (8,462)	$ (41,394)
Other comprehensive income (loss) before tax:
Unrealized loss arising during the period	(550)	0	(218)	0
Gains reclassified into earnings	(127)	0	(314)	0
Change in unrealized losses on cash flow hedges:	(677)	0	(532)	0
Change in unrealized gains (loss) on available-for-sale securities:	(928)	(308)	17	(333)
Change in foreign currency translation adjustments	(364)	(670)	(766)	(440)
Other comprehensive loss before tax	(1,969)	(978)	(1,281)	(773)
Provision for (benefit from) income taxes	12	(7)	6	(12)
Other comprehensive loss, net of tax	(1,981)	(971)	(1,287)	(761)
Total comprehensive income (loss)	$ (6,792)	$ 107	$ (9,749)	$ (42,155)