Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2017	Nov. 30, 2016
Income Tax Disclosure Additional Details [Table] [Line Items]
Earnings before income taxes	$ 6,830	$ 1,967
Income tax expense (benefit)	$ 1,604	$ (2,998)
Effective Income Tax Rate Reconciliation, Percent	23.50%	(152.40%)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%
Income tax benefit related to discrete income tax adjustment		$ 2,900
Foreign Destination [Member]
Income Tax Disclosure Additional Details [Table] [Line Items]
Percent of Revenue (excluding impairment charge) from foreign jurisdictions	80.00%	80.00%
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent	(12.20%)	(22.40%)