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CREDIT ARRANGEMENTS (Scheduled Maturities of Long-term Debt) (Details) - USD ($)
$ in Thousands
Aug. 31, 2017
Aug. 31, 2016
Long-term Debt, Fiscal Year Maturity [Abstract]    
2018 $ 19,182  
2019 18,276  
2020 13,560  
2021 10,648  
2022 122,346  
Thereafter 648,065  
Total long-term debt 832,077  
Less: Debt issuance costs 7,315 $ 4,224
Total long-term debt outstanding $ 824,762 $ 1,071,417