Consolidated Statements of Comprehensive Income (Loss) Statement (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 22,321	$ (29,606)	$ 78,232
Unrealized gain (loss) related to marketable securities, net	284	(57)	(526)
Reclassification adjustment for losses (gains) included in net income (loss)	337	(78)	(133)
Translation adjustment	(505)	219	(185)
Comprehensive income (loss)	$ 22,437	$ (29,522)	$ 77,388