Face (par) amount of debt instrument at time of issuance.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ 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 210.5-02.22(a)(1))

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Notes Payable, Long-Term Debt and Capital Lease Obligations (Fair Value) (Details 4) - USD ($)	Aug. 31, 2015	Aug. 31, 2012	Nov. 30, 2010	Aug. 31, 2009	May. 31, 2008	Feb. 29, 2008
7.750% Senior Notes Due 2016
Debt Instrument [Line Items]
Senior unsecured notes				$ 312,000,000
Senior unsecured notes, interest rate				7.75%
Estimated fair value of senior notes	$ 328,700,000
8.250% Senior Notes Due 2018
Debt Instrument [Line Items]
Senior unsecured notes					$ 150,000,000	$ 250,000,000
Senior unsecured notes, interest rate					8.25%	8.25%
Estimated fair value of senior notes	450,100,000
5.625% Senior Notes Due 2020
Debt Instrument [Line Items]
Senior unsecured notes			$ 400,000,000
Senior unsecured notes, interest rate			5.625%
Estimated fair value of senior notes	418,800,000
4.700% Senior Notes due 2022
Debt Instrument [Line Items]
Senior unsecured notes		$ 500,000,000
Senior unsecured notes, interest rate		4.70%
Estimated fair value of senior notes	$ 495,600,000