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Postretirement and Other Employee Benefits (Estimated Future Benefit Payments) (Details 11)
$ in Thousands
Aug. 31, 2015
USD ($)
Postretirement and Other Employee Benefits [Abstract]  
2016 $ 5,215
2017 5,632
2018 5,548
2019 6,490
2020 7,059
Years 2021 through 2025 $ 38,987