Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands, except Share data	Total	Common stock	Paid-in capital	Treasury stock	Accumulated deficit	Accumulated other comprehensive loss
Balances at Dec. 31, 2011	$ 393,561	$ 1,177	$ 627,637	$ 0	$ (234,908)	$ (345)
Balances (shares) at Dec. 31, 2011		117,675,000
Net income (loss)	(29,606)				(29,606)
Unrealized gain (loss) related to marketable securities, net	(57)					(57)
Realized gain on sale of auction rate securities, previously unrealized, net of tax	0
Recognized loss on redemption of marketable securities, previously unrealized	(78)					(78)
Translation adjustments	219					219
Common stock issued in connection with the exercise of stock options, ESPP and vested RSUs (net of taxes) (shares)		1,896,000
Common stock issued in connection with the exercise of stock options, ESPP and vested RSUs (net of tax)	3,550	19	3,531
Stock repurchase (shares)		0
Stock repurchase	(17,549)	0		(17,549)
Retirement of treasury stock (shares)		(4,071,000)
Retirement of treasury stock	0	(41)	(17,508)	17,549
Stock-based compensation expense related to options, ESPP and RSUs	7,510		7,510
Other	0
Balances at Dec. 29, 2012	357,550	1,155	621,170	0	(264,514)	(261)
Balances (shares) at Dec. 29, 2012		115,500,000
Net income (loss)	22,321				22,321
Unrealized gain (loss) related to marketable securities, net	284					284
Realized gain on sale of auction rate securities, previously unrealized, net of tax	0
Recognized loss on redemption of marketable securities, previously unrealized	337					337
Translation adjustments	(505)					(505)
Common stock issued in connection with the exercise of stock options, ESPP and vested RSUs (net of taxes) (shares)		1,580,000
Common stock issued in connection with the exercise of stock options, ESPP and vested RSUs (net of tax)	2,332	16	2,316
Stock repurchase (shares)		0
Stock repurchase	(6,161)	0		(6,161)
Retirement of treasury stock (shares)		(1,409,000)
Retirement of treasury stock	0	(14)	(6,147)	6,161
Stock-based compensation expense related to options, ESPP and RSUs	9,522		9,522
Other	0
Balances at Dec. 28, 2013	385,680	1,157	626,861	0	(242,193)	(145)
Balances (shares) at Dec. 28, 2013	115,671,000	115,671,000
Net income (loss)	48,580				48,580
Unrealized gain (loss) related to marketable securities, net	(373)					(373)
Realized gain on sale of auction rate securities, previously unrealized, net of tax	(1,147)					(1,147)
Recognized loss on redemption of marketable securities, previously unrealized	170					170
Translation adjustments	(330)					(330)
Common stock issued in connection with the exercise of stock options, ESPP and vested RSUs (net of taxes) (shares)		3,560,000
Common stock issued in connection with the exercise of stock options, ESPP and vested RSUs (net of tax)	8,741	35	8,706
Stock repurchase (shares)		0
Stock repurchase	(13,089)	0		(13,089)
Retirement of treasury stock (shares)		(1,943,000)
Retirement of treasury stock	0	(19)	(13,070)	13,089
Stock-based compensation expense related to options, ESPP and RSUs	12,802		12,802
Other	(59)					(59)
Balances at Jan. 03, 2015	$ 440,975	$ 1,173	$ 635,299	$ 0	$ (193,613)	$ (1,884)
Balances (shares) at Jan. 03, 2015	117,288,000	117,288,000