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CREDIT ARRANGEMENTS (Scheduled Maturities of Long-term Debt) (Details) - USD ($)
$ in Thousands
Aug. 31, 2019
Aug. 31, 2018
Long-term Debt, Fiscal Year Maturity [Abstract]    
2020 $ 17,439  
2021 10,827  
2022 219,049  
2023 337,264  
2024 7,717  
Thereafter 662,625  
Total long-term debt 1,254,921  
Less debt issuance costs 10,268 $ 11,764
Total long-term debt outstanding $ 1,244,653 $ 1,158,365