Income Taxes - Components of Income Tax Expense (Benefit) of Continuing Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2019
Current
Federal	$ (95,875)	$ 21,040	$ 18,894
State	1,853	785	4,775
Foreign	4,321	25,346	37,391
Current Income Tax Expense (Benefit), Total	(89,701)	47,171	61,060
Deferred
Federal	54,106	(8,294)	(8,559)
State	(2,351)	688	(2,542)
Foreign	(3,362)	495	(8,433)
Total Deferred Income Tax Expense (Benefit)	48,393	(7,111)	(19,534)
Change in valuation allowance	1,085	124	62
Income tax expense (benefit)	$ (40,223)	$ 40,184	$ 41,588