CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (DEFICIT) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholders' equity balance as of the year ended			$ (464,314)
Other comprehensive income/(loss):
Net income/(loss)	23,983	4,475	(14,045)	(23,144)
Other comprehensive income (loss): [Abstract]
Currency translation adjustment	(31)	2,412	(3,139)	1,654
Comprehensive (loss) income	23,952	6,887	(17,184)	(21,490)
Exercise of stock options			76	0
Purchase and retirement of common stock upon vesting of RSUs			(509)	(734)
Amortization of stock based compensation	900	1,500	2,879	4,445
Stockholders' equity balance as of the year ended	$ (473,010)		$ (473,010)