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Stock-Based Compensation (Details 1) - USD ($)
$ in Thousands
3 Months Ended
Nov. 30, 2017
Nov. 30, 2016
Stock-Based Compensation [Abstract]    
Restricted stock and stock appreciation rights ("SARS") $ 43,507 $ (2,041)
Employee stock purchase plan 1,700 1,750
Other stock based compensation expense [1] 7,538 0
Total $ 52,745 $ (291)
[1]

(1) Represents a one-time cash-settled stock award that vested on November 30, 2017.