Condensed Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014
Net income (loss)	$ 23,403	$ (1,068)	$ 62,723	$ (1,425)
Other comprehensive income (loss), net of tax
Foreign currency translation adjustments	(35,343)	(8,749)	(50,297)	(2,919)
Available for sale securities, unrealized (loss) gain	(430)	(393)	254	(1,037)
Pension liability adjustments	63	26	80	45
Other comprehensive loss	(35,710)	(9,116)	(49,963)	(3,911)
Comprehensive (loss) income	$ (12,307)	$ (10,184)	$ 12,760	$ (5,336)