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CREDIT ARRANGEMENTS (Scheduled Maturities of Long-term Debt) (Details) - USD ($)
$ in Thousands
Aug. 31, 2020
Aug. 31, 2019
Long-term Debt, Fiscal Year Maturity [Abstract]    
2021 $ 3,776  
2022 9,576  
2023 339,565  
2024 11,706  
2025 9,556  
Thereafter 667,863  
Total long-term debt, excluding finance leases 1,042,042  
Less debt issuance costs 8,581 $ 10,268
Total long-term debt outstanding, excluding finance leases $ 1,033,461