Benefit Plans (Details Textuals) (USD $)	6 Months Ended			1 Months Ended				1 Months Ended	6 Months Ended			1 Months Ended	6 Months Ended						6 Months Ended
	Jul. 01, 2011	Jul. 02, 2010	Dec. 31, 2010	May 31, 2010 Stock Plan 1995 [Member]	Jul. 01, 2011 Stock Plan 1995 [Member] Stock Based Incentive Plans [Member]	Jul. 01, 2011 Stock Options [Member]	Jul. 01, 2011 Stock Options [Member] Stock Based Incentive Plans [Member]	May 31, 2010 Restricted Stock [Member]	Jul. 01, 2011 Restricted Stock [Member]	Jul. 02, 2010 Restricted Stock [Member]	Jul. 01, 2011 Restricted Stock [Member] Stock Based Incentive Plans [Member]	May 31, 2010 Director Option Plans 2002 [Member]	Jul. 01, 2011 Director Option Plans 2002 [Member]	Jul. 02, 2010 Director Option Plans 2002 [Member]	Jul. 01, 2011 Director Option Plans 2002 [Member] Stock Based Incentive Plans [Member]	Jul. 01, 2011 Employee Stock Purchase Plan [Member]	Jul. 01, 2011 Employee Stock Purchase Plan [Member] Stock Based Incentive Plans [Member]	Jul. 01, 2011 The Inactive Plan [Member] Stock Based Incentive Plans [Member]	Jul. 01, 2011 Employee Stock Option [Member]	Jul. 01, 2011 Stock Plan 2002 [Member]	Jul. 02, 2010 Stock Plan 2002 [Member]	Jul. 01, 2011 Purchase Consideration [Member]	Jul. 01, 2011 Compensation Expense [Member]
Benefit Plans (Textuals) [Abstract]
Share Based Compensation Arrangement By Share Based Payment Award Shares Reserved For Issuance													0						0
Weighted-average fair value of option granted	$ 4.55	$ 3.09
Common stock reserved for issuance under Stock based incentive plans					19,134,221										619,162		2,829,786	2,169,412
Stocks available for grants	8,162,000		10,449,000		7,998,875	380,000	7,171,074		75,845		3,964,272				163,317
Maximum term of stock options granted																			7 years
Rights for vesting of the shares under option on each anniversary of the grant date									25% vesting at one year from date of grant or the vesting commencement date chosen for the award, and either an additional 1/16 per quarter thereafter, or 1/8 semiannually thereafter										25% at one year from date of grant, and an additional 1/48 per month thereafter
Restricted stock vesting period									4 years
Additional shares authorized for issuance on modification				10,600,000								400,000
Decreased the maximum term of stock options				7 years
Maximum Exercise price as percentage to fair value				100.00%																85.00%
Increase in number of shares authorized																$ 2,000,000
Decrease Plan reserve for every unit				1.5 shares for every unit or share granted
Increase Plan Reserve For Every Unit				1.5 shares for every unit or share forfeited
Increased number of shares reserved for every unit forfeited												1.5
Reduced the number of shares reserved for every unit granted								2				1.5
Restricted stock units granted									1,570,300	1,501,100
Fair value of restricted stocks		14,900,000							9,500,000
Fair value of stock options and restricted stock units issued to employees	17,300,000																					2,100,000	15,200,000
Units granted to non employee directors	(833,000)												75,845	87,367
Weighted-average remaining contractual life of all vested and expected-to-vest restricted stock units									1.4
Common Stock for issuance under various employee stock option plans																				945,287	864,800
Common Stock for issuance weighted average price																				$ 5.54	$ 4.90
Grant date fair value of restricted stock	5,800,000												700,000	500,000
Weighted-average fair value of option granted																				$ 2.02	$ 1.91
Additional Benefit Plans (Textuals) [Abstract]
Exercise price of Restricted stock units	0
Weighted-average remaining contractual life for all exercisable stock options	3.2
Weighted-average remaining contractual life of all vested and expected-to-vest stock options	4.0
Aggregate intrinsic value of options exercisable	6,000,000
Aggregate intrinsic value of stock options vested and expected-to-vest net of estimated forfeitures	10,100,000
Closing price of share on last trading day of fiscal year	$ 7.46
Aggregate intrinsic value of exercised options	4,900,000
Retirement/Saving Plan Description	Plan allows participants to contribute up to 20% of total compensation, subject to applicable Internal Revenue Service limitations. Employer can make discretionary contributions to the plan of 25% of the first 4% contributed by eligible participants up to a maximum contribution per participant of $1,000 per year
Total unamortized stock-based compensation cost related to unvested stock options and restricted stock units	$ 41,100,000
Remaining weighted-average amortization period	2.6
Stock options to purchase	1,522,000
Number of shares to purchase under restricted stock units	1,455,000
Average service period	2 years 6 months