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. 02, 2010	$ 253,360	$ 1,156	$ 622,258	$ 0	$ (370,212)	$ 158
Balances (shares) at Jan. 02, 2010		115,592,000
Net income (loss)	57,072				57,072
Unrealized (loss) gain related to marketable securities, net	581					581
Tax effect of change in fair market value of auction rate securities	(304)					(304)
Recognized gain on redemption of marketable securities, previously unrealized	0
Translation adjustments	64					64
Common stock issued in connection with the exercise of stock options, ESPP and vested RSUs (net of taxes) (shares)		2,750,000
Common stock issued in connection with the exercise of stock options, ESPP and vested RSUs (net of taxes)	5,368	27	5,341
Stock repurchase (shares)		(371,000)
Stock repurchase	(1,970)	(4)		(1,966)
Retirement of treasury stock (shares)		0
Retirement of treasury stock	0	0	(1,966)	1,966
Stock-based compensation expense related to stock options, ESPP and RSUs	4,551		4,551
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 (loss) gain related to marketable securities, net	(526)					(526)
Tax effect of change in fair market value of auction rate securities	0
Recognized gain on redemption of marketable securities, previously unrealized	(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	117,675,000
Net income (loss)	(29,606)				(29,606)
Unrealized (loss) gain related to marketable securities, net	(57)					(57)
Tax effect of change in fair market value of auction rate securities	0
Recognized gain 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 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