Revenue Recognition - Summary of Contract Balances (Detail) - USD ($) $ in Thousands		9 Months Ended
		May 31, 2020	Aug. 31, 2019
Change In Contract With Customer Asset And Liability [Abstract]
Contract assets		$ 7,471	$ 10,196
Contract liabilities	[1]	47,648	$ 52,118
Change in contract assets		(2,725)
Change in contract liabilities	[1]	$ (4,470)

[1] Contract liabilities balance includes deferred revenue within the scope of Topic 606.