Notes Payable, Long-Term Debt and Capital Lease Obligations (Details 1) - USD ($) $ in Thousands	Feb. 28, 2017	Aug. 31, 2016
Debt Instrument [Line Items]
Borrowings under loans	$ 484,801	$ 502,210
Capital lease obligations	27,562	28,478
Total notes payable, long-term debt and capital lease obligations	2,102,869	2,119,822
Less current installments of notes payable, long-term debt and capital lease obligations	47,324	45,810
Notes payable, long-term debt and capital lease obligations, less current installments	2,055,545	2,074,012
8.250% Senior Notes Due 2018
Debt Instrument [Line Items]
Senior Notes	399,029	398,552
5.625% Senior Notes Due 2020
Debt Instrument [Line Items]
Senior Notes	396,658	396,212
4.700% Senior Notes due 2022
Debt Instrument [Line Items]
Senior Notes	496,369	496,041
4.900% Senior Notes due 2023
Debt Instrument [Line Items]
Senior Notes	$ 298,450	$ 298,329

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 16
-Article 7

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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.

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Including the current and noncurrent portions, aggregate carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Number 210
-Section 02
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Section S99
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-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 6
-Section H

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Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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