Income Taxes (Details) - USD ($) $ in Thousands			3 Months Ended	9 Months Ended
Jan. 01, 2018	Dec. 31, 2017	May 31, 2020	May 31, 2019	May 31, 2020	May 31, 2019
Effective income tax rate
Income taxes			$ 2,619	$ 3,647	$ 8,254	$ 8,291
Income before income taxes			$ 12,527	$ 12,188	$ 33,403	$ 30,928
Effective income tax rate			20.90%	29.90%	24.70%	26.80%
Statutory tax rate (as a percent)	21.00%	35.00%			21.00%	21.00%

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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