Income Taxes - Summary of Income Tax Expense (Benefit) from Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2017
Current:
Federal	$ 2,690	$ 19,511	$ (1,130)
State	315	894	190
Foreign	52		(16)
Total current tax expense (benefit)	3,057	20,405	(956)
Deferred:
Federal	12,930	(5,700)	2,046
State	794	(1,962)	232
Foreign	889	(30,333)
Total deferred tax expense (benefit)	14,613	(37,995)	2,278
Total income tax expense (benefit)	$ 17,670	$ (17,590)	$ 1,322