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Stock-Based Compensation Plans (Stock Option Activity) (Details) - Stock Options [Member] - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Aug. 31, 2018
Aug. 31, 2017
Aug. 31, 2016
Number of Stock Options, Outstanding at August 31, 2017 568,750    
Number of Stock Options, Granted    
Number of Stock Options, Exercised (62,500) 0
Number of Stock Options, Forfeited    
Number of Stock Options, Outstanding at August 31, 2018 568,750 568,750  
Number of Stock Options, Options vested and exercisable at August 31, 2018 568,750    
Weighted Average Exercise Price Per Share, Outstanding at August 31, 2017 $ 11.67    
Weighted Average Exercise Price Per Share, Granted    
Weighted Average Exercise Price Per Share, Exercised    
Weighted Average Exercise Price Per Share, Forfeited    
Weighted Average Exercise Price Per Share, Outstanding at August 31, 2018 11.67 $ 11.67  
Weighted Average Exercise Price Per Share, Options vested and exercisable at August 31, 2018 $ 11.67    
Weighted Average Remaining Contractual Life, Outstanding at August 31, 2018 1 year 9 months 18 days    
Weighted Average Remaining Contractual Life, Options vested and exercisable at August 31, 2018 1 year 9 months 18 days    
Aggregate Intrinsic Value, Outstanding at August 31, 2018 $ 7,923    
Aggregate Intrinsic Value, Options vested and exercisable at August 31, 2018 $ 7,923