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CREDIT ARRANGEMENTS (Long-term Debt, Including the Deferred Gain from the Termination of the Interest Rate Swaps) (Details) - USD ($) $ in Thousands | May 31, 2019 | Aug. 31, 2018 | Jul. 31, 2017 | May 31, 2013
--- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Total debt | $ 1,372,448 | $ 1,170,129 |  |
Less debt issuance costs | 10,690 | 11,764 |  |
Total amounts outstanding | 1,361,758 | 1,158,365 |  |
Less current maturities | 29,568 | 19,746 |  |
Less short-term borrowings | 25,327 | 0 |  |
Current maturities of long-term debt and short-term borrowings | 54,895 | 19,746 |  |
Long-term debt | $ 1,306,863 | 1,138,619 |  |
2027 Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Weighted average interest rate | 5.375% |  | 5.375% |
2026 Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Weighted average interest rate | 5.75% |  |  |
2023 Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Weighted average interest rate | 4.875% |  |  | 4.875%
Other, including equipment notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total debt | $ 56,996 | $ 47,629 |  |
Revolving credit facility | Term Loans |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Weighted average interest rate | 4.115% |  |  |
U.S. Program | Short-term borrowings |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Weighted average interest rate | 3.12% |  |  |
Poland Program | Short-term borrowings |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Weighted average interest rate | 2.41% |  |  |

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