Represents the reversal of expenses recognized during the period arising from equity-based compensation arrangements.

No definition available.

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- Definition

Represents the number of grant date anniversaries for vesting the options in each year.

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No definition available.

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Represents the number of three months periods from the grant date of stock awards.

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No definition available.

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- Definition

Represents the anniversary, from date of grant, through which an employee must be continuously employed in order to vest in the award.

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No definition available.

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- Definition

Represents the period at the end of which the entity should achieve targeted total shareholders return in order to exercise award.

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No definition available.

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- Definition

Represents the fraction of number of awards vested on each anniversary of the grant date.

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No definition available.

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- Definition

Represents award terms as to how many shares or portion of an award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, shown as a percentage.

+ References

No definition available.

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- Definition

The period of time, from the grant date until the time at which the share-based [option] award expires.

+ References

No definition available.

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ 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)(2)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(b)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Paragraph A240

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

+ References

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

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- Definition

Expected term of share-based compensation awards, 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 S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.D.2)

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-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (f)(2)(i)

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section D

-Subsection 2

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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- Definition

The maximum risk-free interest rate assumption that is used in valuing an option on its own shares.

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No definition available.

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- Definition

The minimum risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

No definition available.

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- Definition

Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

+ References

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- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ References

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- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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- Definition

The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(b)

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Number of share options (or share units) exercised during the current period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.28,29)

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EQUITY COMPENSATION PLANS (Details) (USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended									3 Months Ended							3 Months Ended						3 Months Ended
	Oct. 27, 2012	Oct. 29, 2011	Oct. 27, 2012 Minimum	Oct. 29, 2011 Minimum	Oct. 27, 2012 Maximum	Oct. 29, 2011 Maximum	Oct. 27, 2012 Options item	Oct. 29, 2011 Options item	Oct. 27, 2012 Performance and market based awards	Oct. 27, 2012 Performance Based Awards	Oct. 29, 2011 Performance Based Awards	Apr. 30, 2011 Performance Based Awards	Oct. 29, 2011 Performance Based Awards Minimum	Apr. 30, 2011 Performance Based Awards Minimum	Oct. 29, 2011 Performance Based Awards Maximum	Apr. 30, 2011 Performance Based Awards Maximum	Oct. 27, 2012 Market Based Awards	Apr. 30, 2011 Market Based Awards	Oct. 27, 2012 Market Based Awards Minimum	Apr. 30, 2011 Market Based Awards Minimum	Oct. 27, 2012 Market Based Awards Maximum	Apr. 30, 2011 Market Based Awards Maximum	Apr. 30, 2011 Other Awards Officer	May 01, 2010 Other Awards Officer	Oct. 27, 2012 Other Awards Non-employee director item	Jul. 30, 2011 Other Awards Non-employee director
Number of shares
Outstanding at the beginning of the period (in shares)							2,008,430
Granted (in shares)							287,574	265,000		106,000		95,000					53,000	48,000					50,000		33,000	42,000
Exercised (in shares)							(247,553)
Forfeited (in shares)							(36,225)
Expired (in shares)							(274,216)
Outstanding at the end of the period (in shares)							1,738,010
Additional disclosures
Weighted average grant date fair value (in dollars per share)							$ 4.65	$ 5.38
Options expiration term							7 years	7 years
Ratio of vesting on each anniversary (as a percent)							33.40%	33.40%																	25.00%
The anniversary, from date of grant, through which an employee must be continuously employed in order to vest in the award											3 years	3 years					3 years	3 years
Vesting period							3 years	3 years															3 years	3 years
Number of grant date anniversaries							3	3
Weighted-average assumptions used for estimated fair value of stock options using Black-Scholes option pricing model
Dividend yield (as a percent)	0.00%	1.00%
Expected volatility (as a percent)	57.70%	58.20%
Risk-free interest rate range, high (as a percent)	0.60%	1.90%
Risk-free interest rate range, low (as a percent)	0.50%	1.60%
Expected life in years			4 years	4 years	5 years	5 years
Period to satisfy targeted total shareholder return																	3 years	3 years
Additional disclosures
Number of underlying shares issued upon vesting (as a percent)													0.00%	0.00%	150.00%	150.00%			0.00%	0.00%	175.00%	175.00%
Number of quarters following the grant date																									4
Fair value at grant date (in dollars per share)										$ 9.98		$ 12.48					$ 7.96	$ 14.73					$ 13.68		$ 9.98	$ 10.67
Reversal of compensation expenses recognized										$ 0.9
Performance and market based award units (in shares)
Nonvested at the beginning of the period (in shares)									626,747
Granted (in shares)									319,082
Forfeited (in shares)									(69,180)
Vested (in shares)									(43,216)
Nonvested at the end of the period (in shares)									833,433