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CREDIT ARRANGEMENTS (Long-term Debt, Including the Deferred Gain from the Termination of the Interest Rate Swaps) (Details) - USD ($) | Nov. 30, 2017 | Aug. 31, 2017 | Jul. 31, 2017 | May 31, 2013
--- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Total debt | $ 832,133,000 | $ 832,077,000 |  |
Less: Debt issuance costs | 7,102,000 | 7,315,000 |  |
Total amounts outstanding | 825,031,000 | 824,762,000 |  |
Less: Current maturities of long-term debt | 21,246,000 | 19,182,000 |  |
Long-term debt | $ 803,785,000 | 805,580,000 |  |
2027 Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Weighted average interest rate | 5.375% |  | 5.375% |
Debt instrument, face amount | $ 300,000,000 | 300,000,000 | $ 300,000,000 |
2023 Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Weighted average interest rate | 4.875% |  |  |
Debt instrument, face amount |  |  |  | $ 330,000,000
Total debt | $ 330,000,000 | 330,000,000 |  |
Other, including equipment notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total debt | 52,133,000 | 52,077,000 |  |
Revolving credit facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum principal amount | $ 750,000,000 |  |  |
Revolving credit facility | Term Loan (Due 2022) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Weighted average interest rate | 2.83% |  |  |
Maximum principal amount | $ 150,000,000 | $ 150,000,000 |  |

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- Definition 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. + 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 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 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 + Details
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