Stock-Based Compensation - Summarized Information of Stock Options Outstanding (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 27, 2013
Stock Options Price Range Analysis-Outstanding
Price Range Analysis - Outstanding
Number of Shares	2,579
Weighted Average Exercise Price (in dollars per share)	$ 18.29
Weighted Average Contractual Term	2 years 8 months 16 days
Stock Options Price Range Analysis-Outstanding | $1.15 - $4.53
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range - lower range limit (in dollars per share)	$ 1.15
Exercise price range - upper range limit (in dollars per share)	$ 4.53
Price Range Analysis - Outstanding
Number of Shares	9
Weighted Average Exercise Price (in dollars per share)	$ 2.52
Weighted Average Contractual Term	4 years 3 months 7 days
Stock Options Price Range Analysis-Outstanding | $7.79 - $13.15
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range - lower range limit (in dollars per share)	$ 7.79
Exercise price range - upper range limit (in dollars per share)	$ 13.15
Price Range Analysis - Outstanding
Number of Shares	247
Weighted Average Exercise Price (in dollars per share)	$ 11.59
Weighted Average Contractual Term	2 years 1 month 6 days
Stock Options Price Range Analysis-Outstanding | $13.76 - $20.90
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range - lower range limit (in dollars per share)	$ 13.76
Exercise price range - upper range limit (in dollars per share)	$ 20.90
Price Range Analysis - Outstanding
Number of Shares	1,671
Weighted Average Exercise Price (in dollars per share)	$ 16.58
Weighted Average Contractual Term	2 years 1 month 17 days
Stock Options Price Range Analysis-Outstanding | $21.02 - $29.68
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range - lower range limit (in dollars per share)	$ 21.02
Exercise price range - upper range limit (in dollars per share)	$ 29.68
Price Range Analysis - Outstanding
Number of Shares	652
Weighted Average Exercise Price (in dollars per share)	$ 25.43
Weighted Average Contractual Term	4 years 5 months 1 day
Stock Options Price Range Analysis-Exercisable
Price Range Analysis - Exercisable
Number of Shares	1,937
Weighted Average Exercise Price (in dollars per share)	$ 16.51
Weighted Average Contractual Term	2 years 0 months 25 days
Stock Options Price Range Analysis-Exercisable | $1.15 - $4.53
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range - lower range limit (in dollars per share)	$ 1.15
Exercise price range - upper range limit (in dollars per share)	$ 4.53
Price Range Analysis - Exercisable
Number of Shares	9
Weighted Average Exercise Price (in dollars per share)	$ 2.52
Weighted Average Contractual Term	4 years 3 months 7 days
Stock Options Price Range Analysis-Exercisable | $7.79 - $13.15
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range - lower range limit (in dollars per share)	$ 7.79
Exercise price range - upper range limit (in dollars per share)	$ 13.15
Price Range Analysis - Exercisable
Number of Shares	241
Weighted Average Exercise Price (in dollars per share)	$ 11.62
Weighted Average Contractual Term	2 years 0 months 14 days
Stock Options Price Range Analysis-Exercisable | $13.76 - $20.90
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range - lower range limit (in dollars per share)	$ 13.76
Exercise price range - upper range limit (in dollars per share)	$ 20.90
Price Range Analysis - Exercisable
Number of Shares	1,494
Weighted Average Exercise Price (in dollars per share)	$ 16.52
Weighted Average Contractual Term	1 year 11 months 16 days
Stock Options Price Range Analysis-Exercisable | $21.02 - $29.68
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range - lower range limit (in dollars per share)	$ 21.02
Exercise price range - upper range limit (in dollars per share)	$ 29.68
Price Range Analysis - Exercisable
Number of Shares	193
Weighted Average Exercise Price (in dollars per share)	$ 23.18
Weighted Average Contractual Term	2 years 9 months 25 days