Share based Compensation Arrangement by Share-based Payment Award, Date of Expiration

No definition available.

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- Definition

Share Based Compensation Arrangement, By Share Based Payment Award, Number Of Shares Granted Based On Target Award Percenatge

+ References

No definition available.

+ Details

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- Definition

Share Based Compensation Arrangement, By Share Based Payment Award, Perfromance Shares Target Award

+ References

No definition available.

+ Details

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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.

+ References

+ Details

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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

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)(iii)(1)

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(c)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

+ Details

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Data Type:	xbrli:sharesItemType
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- Details

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- Definition

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

+ 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)(iv)(1)

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(d)

-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.

+ Details

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Data Type:	xbrli:sharesItemType
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Period Type:	duration

- Definition

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

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph c(1)

-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.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (d)(1)

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

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

Share Based Compensation (Details) (USD $)	0 Months Ended		3 Months Ended		0 Months Ended		3 Months Ended							9 Months Ended
Share Based Compensation (Details) (USD $)	Mar. 25, 2013	Apr. 02, 2012	Apr. 30, 2013	Apr. 30, 2012	Mar. 25, 2013 Time Vested Units [Member] 2010 Stock Incentive Plan [Member]	Apr. 02, 2012 Time Vested Units [Member] 2010 Stock Incentive Plan [Member]	Apr. 30, 2013 Time Vested Units [Member] 2010 Stock Incentive Plan [Member]	Apr. 30, 2012 Time Vested Units [Member] 2010 Stock Incentive Plan [Member]	Apr. 30, 2013 Performance Based Restricted Stock Units [Member]	Apr. 30, 2013 Performance Based Restricted Stock Units [Member] 2010 Stock Incentive Plan [Member]	Apr. 30, 2012 Performance Based Restricted Stock Units [Member] 2010 Stock Incentive Plan [Member]	Apr. 30, 2013 Restricted Stock Units [Member]	Apr. 30, 2012 Restricted Stock Units [Member]	Oct. 31, 2012 Minimum [Member] Performance Based Restricted Stock Units [Member]	Oct. 31, 2012 Maximum [Member] Performance Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (in shares)	198,900	151,200
Stock options vesting period, years			4 years				3 years			3 years
Share Based Compensation Arrangement, By Share Based Payment Award, Number Of Shares Granted Based On Target Award Percenatge									100.00%
Years to expiration			5 years
Weighted average grant date fair value			$ 9.34	$ 10.96			$ 32.85	$ 31.66				$ 32.85	$ 31.66
Grants in period (in shares)					25,540	21,120				50,940	56,222
Perfromance shares target award														0.00%	150.00%