Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

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-Name Accounting Standards Codification

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-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.13,16)

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- Definition

Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

+ 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 210.5-02.19,20)

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-Name Regulation S-X (SX)

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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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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Weighted average interest rate of debt outstanding.

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No definition available.

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

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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))

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-Number 210

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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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- Definition

Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

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-Name Accounting Standards Codification

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-Subparagraph (SX 210.5-02.22)

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-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 6

-Section H

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- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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-Publisher FASB

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-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(f))

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-Number 210

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-Topic 230

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-Section 45

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-Subparagraph (b)

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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Debt (Details) (USD $)	3 Months Ended	6 Months Ended
Debt (Details) (USD $)	Nov. 30, 2014	Feb. 28, 2015	Aug. 31, 2014
Debt [Line Items]
Total debt		$ 60,821,000us-gaap_DebtAndCapitalLeaseObligations	$ 657,096,000us-gaap_DebtAndCapitalLeaseObligations
Less short-term borrowings and current portion of long-term debt		(15,664,000)us-gaap_DebtCurrent	(609,506,000)us-gaap_DebtCurrent
Long-term debt		45,157,000	47,590,000
Letters of credit outstanding		44,000,000	24,000,000
Revolving credit facility [Member]
Debt [Line Items]
Total debt		0	585,000,000
Borrowing capacity		625,000,000
Debt term		5 years
Debt repaid	585,000,000
Weighted average interest rate			3.50%
Revolving credit facility [Member] \| Minimum [Member]
Debt [Line Items]
Fees		0.25%
Revolving credit facility [Member] \| Minimum [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt [Line Items]
Fees for borrowings		1.25%
Revolving credit facility [Member] \| Maximum [Member]
Debt [Line Items]
Fees		0.40%
Revolving credit facility [Member] \| Maximum [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt [Line Items]
Fees for borrowings		1.85%
Capital Lease Obligations [Member]
Debt [Line Items]
Total debt		22,707,000	32,806,000
Notes Payable, Other Payables [Member]
Debt [Line Items]
Total debt		$ 38,114,000	$ 39,290,000
Weighted average interest rate		5.60%	5.80%
Technology Purchase Obligation [Member]
Debt [Line Items]
Debt term		10 years