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Income Taxes (Schedule of Earnings Before Income Taxes) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Aug. 31, 2020
May 31, 2020
Feb. 29, 2020
Nov. 30, 2019
Aug. 31, 2019
May 31, 2019
Feb. 28, 2019
Nov. 30, 2018
Aug. 31, 2020
Aug. 31, 2019
Aug. 31, 2018
Income Tax Disclosure [Abstract]                      
United States                 $ 38,928 $ (1,949) $ 25,116
Foreign                 9,915 4,056 8,737
Earnings before income taxes $ 18,456 $ 12,265 $ 6,867 $ 11,255 $ 2,265 $ 3,229 $ (5,068) $ 1,681 $ 48,843 $ 2,107 $ 33,853