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 Jan. 01, 2011	$ 318,722	$ 1,179	$ 630,184	$ 0	$ (313,140)	$ 499
Balances (shares) at Jan. 01, 2011		117,971,000
Net income (loss)	78,232				78,232
Unrealized gain (loss) related to marketable securities, net	(526)					(526)
Less: reclassification adjustment for losses (gains) included in other income, net	(133)					(133)
Translation adjustments	(185)					(185)
Common stock issued in connection with the exercise of stock options, ESPP and vested RSUs (net of taxes) (shares)		2,145,000
Common stock issued in connection with the exercise of stock options, ESPP and vested RSUs (net of taxes)	5,531	23	5,508
Stock repurchase (shares)		(2,441,000)
Stock repurchase	(14,436)	(25)		(14,411)
Retirement of treasury stock (shares)		0
Retirement of treasury stock	0	0	(14,411)	14,411
Stock-based compensation expense related to stock options, ESPP and RSUs	6,356		6,356
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)
Less: reclassification adjustment for losses (gains) included in other income, net	(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 taxes)	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 stock options, ESPP and RSUs	7,510		7,510
Balances at Dec. 29, 2012	357,550	1,155	621,170	0	(264,514)	(261)
Balances (shares) at Dec. 29, 2012	115,500,000	115,500,000
Net income (loss)	22,321				22,321
Unrealized gain (loss) related to marketable securities, net	284					284
Less: reclassification adjustment for losses (gains) included in other income, net	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 taxes)	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 stock options, ESPP and RSUs	9,522		9,522
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