Stockholders' Equity (Employee and Director Stock Options, Restricted Stock and ESPP) (Details 2) (USD $)	12 Months Ended			3 Months Ended		9 Months Ended
	Jan. 03, 2015 population	Dec. 28, 2013	Dec. 29, 2012	Jun. 28, 2014	Mar. 29, 2014	Sep. 27, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of employee populations for fair value assumptions	2
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Total unrecognized compensation cost related to unvested employee and director stock options	$ 10,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Beginning balance	10,441,000				10,441,000	10,441,000
Granted	1,932,000
Exercised	(2,486,000)
Forfeited or expired	(512,000)
Ending balance	9,375,000	10,441,000
Vested and expected to vest at end of period, Shares	9,375,000
Exercisable at end of period, Shares	5,114,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Beginning balance	$ 4.88				$ 4.88	$ 4.88
Granted	$ 7.16
Exercised	$ 4.41
Forfeited or expired	$ 5.41
Ending balance	$ 5.45	$ 4.88
Vested and expected to vest at end of period, Weighted average exercise price	$ 5.45
Exercisable at end of period, Weighted average exercise price	$ 5.01
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Vested and expected to vest at end of period, Weighted average remaining contractual term	4 years 204 days
Vested and expected to vest at end of period, aggregate intrinsic value	14,427,000
Exercisable at end of period, Weighted average remaining contractual term	3 years 241 days
Exercisable at end of period, aggregate intrinsic value	9,827,000
Total intrinsic value of options exercised	7,800,000	2,500,000	3,400,000
Total fair value of options and RSU's vested and expensed	12,800,000	9,300,000	7,400,000
Grant date weighted average fair values based on fair value assumptions, options	$ 2.93	$ 2.10	$ 2.74
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Compensation expense	12,802,000	9,522,000	7,510,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Shares of common stock available for future grants	9,600,000
Shares of common stock available for future purchases under ESPP	2,500,000
Stock options
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected volatility, percent, minimum	45.40%	51.40%	58.10%
Expected volatility, percent, maximum	50.40%	54.30%	59.50%
Risk-free interest rate, percent, minimum	1.50%	0.70%	0.60%
Risk-free interest rate, percent, maximum	1.70%	1.00%	1.00%
Dividend yield	0.00%	0.00%	0.00%
Weighted average period for recognition	4 years 7 months
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Shares of common stock available for future grants	9,600,000
Stock options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected term	4 years 1 month 6 days	4 years 1 month 6 days	4 years 1 month 6 days
Stock options | Maximum
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected term	4 years 8 months 12 days	4 years 6 months	4 years 6 months
ESPP
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected term	6 months	6 months	6 months
Dividend yield	0.00%	0.00%	0.00%
Weighted average expected volatility rate (percent)	38.70%	48.00%	50.00%
Weighted average risk-free interest rate (percent)	0.08%	0.11%	0.12%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Grant date weighted average fair values based on fair assumptions, non-options	$ 1.73	$ 1.29	$ 1.35
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Granted, Weighted average grant date fair value	$ 1.73	$ 1.29	$ 1.35
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Grant date weighted average fair values based on fair assumptions, non-options	$ 7.50
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Balance at the beginning of period, Shares	2,190,000				2,190,000	2,190,000
Granted, Shares	1,316,000			98,592		700,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Number of Tranches	2
Vested, Shares	(1,302,000)				(49,296)
Forfeited, Shares	(183,000)
Balance at the end of period, Shares	2,021,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Balance at the beginning of period, Weighted average grant date fair value	$ 5.49				$ 5.49	$ 5.49
Granted, Weighted average grant date fair value	$ 7.50
Vested, Weighted average grant date fair value	$ 5.61
Forfeited, Weighted average grant date fair value	$ 6.18
Balance at the end of period, Weighted average grant date fair value	$ 6.66
Unrecognized compensation expense related to unvested RSU's	11,100,000
Q1 2014 Grant [Member] | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Compensation expense					500,000
Q2 2014 Grant [Member] | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Compensation expense				200,000