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Notes Payable and Long-Term Debt Schedule of Line of Credit Facilities (Details) - Line of credit - Revolving credit facility $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Aug. 31, 2017 USD ($) | Aug. 31, 2016 USD ($) | Dec. 31, 2015
Five-year revolving facilities |  |  |
Line of Credit Facility [Line Items] |  |  |
Line of Credit Facility, Current Borrowing Capacity | $ 3,000,000 |  |
Long-term Line of Credit | $ 480,000 | $ 700,000 |
Bilateral, uncommitted revolving facilities [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Line of Credit Facility, Number of Bilaterals | 1 |  | 3
Line of Credit Facility, Current Borrowing Capacity | $ 250,000 |  |
Short-term Debt, Fair Value | $ 250,000 | $ 300,000 |
Minimum | Five-year revolving facilities |  |  |
Line of Credit Facility [Line Items] |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.00% |  |
Minimum | Bilateral, uncommitted revolving facilities [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.00% |  |
Maximum | Five-year revolving facilities |  |  |
Line of Credit Facility [Line Items] |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.45% |  |
Maximum | Bilateral, uncommitted revolving facilities [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.05% |  |

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- Definition Line of Credit Facility, Number of Bilaterals + 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. + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the 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)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: 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)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: 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 + Details
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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any 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 + Details
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- Definition 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. + References No definition available. + Details
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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount of short-term debt existing as of the balance sheet date. + References No definition available. + Details
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