Equity Award Plans - Summarizes Information about Stock Options Outstanding (Details) shares in Thousands	12 Months Ended
Jan. 30, 2016 $ / shares shares
Range one
Summary of information about stock options outstanding
Range of Exercise Prices, lower range	$ 3.52
Range of Exercise Prices, upper range	$ 4.00
Number of Stock Options Outstanding \| shares	2
Stock Options Outstanding, Weighted Average Remaining Life	2 years 9 months 18 days
Stock Option Outstanding, Weighted Average Exercise Price	$ 3.52
Number of Stock Options Exercisable \| shares	2
Stock Option Exercisable, Weighted Average Exercise Price	$ 3.52
Range two
Summary of information about stock options outstanding
Range of Exercise Prices, lower range	4.01
Range of Exercise Prices, upper range	$ 14.00
Number of Stock Options Outstanding \| shares	54
Stock Options Outstanding, Weighted Average Remaining Life	5 years 1 month 6 days
Stock Option Outstanding, Weighted Average Exercise Price	$ 11.77
Number of Stock Options Exercisable \| shares	43
Stock Option Exercisable, Weighted Average Exercise Price	$ 11.89
Range three
Summary of information about stock options outstanding
Range of Exercise Prices, lower range	14.01
Range of Exercise Prices, upper range	$ 15.00
Number of Stock Options Outstanding \| shares	486
Stock Options Outstanding, Weighted Average Remaining Life	8 years 8 months 12 days
Stock Option Outstanding, Weighted Average Exercise Price	$ 14.34
Number of Stock Options Exercisable \| shares	153
Stock Option Exercisable, Weighted Average Exercise Price	$ 14.33
Range four
Summary of information about stock options outstanding
Range of Exercise Prices, lower range	15.01
Range of Exercise Prices, upper range	$ 19.00
Number of Stock Options Outstanding \| shares	20
Stock Options Outstanding, Weighted Average Remaining Life	8 years
Stock Option Outstanding, Weighted Average Exercise Price	$ 15.68
Number of Stock Options Exercisable \| shares	6
Stock Option Exercisable, Weighted Average Exercise Price	$ 16.20
Range five
Summary of information about stock options outstanding
Range of Exercise Prices, lower range	19.01
Range of Exercise Prices, upper range	$ 23.00
Number of Stock Options Outstanding \| shares	123
Stock Options Outstanding, Weighted Average Remaining Life	6 years 9 months 18 days
Stock Option Outstanding, Weighted Average Exercise Price	$ 20.43
Number of Stock Options Exercisable \| shares	75
Stock Option Exercisable, Weighted Average Exercise Price	$ 20.62
Range six
Summary of information about stock options outstanding
Range of Exercise Prices, lower range	23.01
Range of Exercise Prices, upper range	$ 31.38
Number of Stock Options Outstanding \| shares	35
Stock Options Outstanding, Weighted Average Remaining Life	7 years 9 months 18 days
Stock Option Outstanding, Weighted Average Exercise Price	$ 30.86
Number of Stock Options Exercisable \| shares	21
Stock Option Exercisable, Weighted Average Exercise Price	$ 30.85
Range seven
Summary of information about stock options outstanding
Range of Exercise Prices, lower range	3.52
Range of Exercise Prices, upper range	$ 31.38
Number of Stock Options Outstanding \| shares	720
Stock Options Outstanding, Weighted Average Remaining Life	8 years 1 month 6 days
Stock Option Outstanding, Weighted Average Exercise Price	$ 16.00
Number of Stock Options Exercisable \| shares	300
Stock Option Exercisable, Weighted Average Exercise Price	$ 16.68

Share based compensation shares authorized under stock option plans by exercise price range.

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(iii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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- Definition

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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