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Long-Term Debt (Details Textual) (USD $) In Millions, unless otherwise specified	9 Months Ended		0 Months Ended	9 Months Ended		0 Months Ended	9 Months Ended			9 Months Ended
	Apr. 30, 2014	Apr. 30, 2014 Revolving Credit Facility	Mar. 01, 2013 Revolving Credit Facility Minimum	Apr. 30, 2014 Revolving Credit Facility Minimum	Sep. 29, 2011 Revolving Credit Facility Minimum	Mar. 01, 2013 Revolving Credit Facility Maximum	Apr. 30, 2014 Revolving Credit Facility Maximum	Apr. 30, 2014 Alternative currency borrowing credit facility	Apr. 30, 2014 Letter of Credit	Apr. 30, 2014 Term Loan Facility	Apr. 30, 2014 Term Loan Facility Original Limit	Jan. 14, 2011 Term Loan Facility Original Limit	Sep. 29, 2011 Term Loan Facility Maximum Original Limit
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 100.0			$ 400.0			$ 100.0	$ 50.0		$ 400.0	$ 400.0	$ 500.0
Net leverage ratio			1:1			1.5:1
Outstanding borrowings										312.5
Quarterly payments for term loan										$ 18.8
Maturity date										Dec. 14, 2015
Reference rate basis	(i) the Eurocurrency Rate; (ii) the Federal Funds Rate; or (iii) the Prime Rate as described in the Credit Facility
Reference rate	0.15%
Applicable interest rate added to reference rate in order to compute variable interest rate	1.50%			1.50%			2.00%
Commitment fee percentage				0.075%			0.125%
Line of credit facility interest rate during period	2.00%

X

- Definition

Represents amortization of notional amount for derivative over the specified period.

+ References

No definition available.

+ Details

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- Definition

Represents a ratio used to calculate the financial leverage of an entity to understand methods of financing or to measure its ability to meet financial obligations.

+ References

No definition available.

+ Details

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- Definition

Represents the reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate on specific date.

+ References

No definition available.

+ Details

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

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- Definition

Amount borrowed under the credit facility as of the balance sheet date.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

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Namespace Prefix:	us-gaap_
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Balance Type:	credit
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X

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

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- Definition

The effective interest rate during the reporting period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



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

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-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

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- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

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