Segment Information - Summary of Geographic Information (Detail) - USD ($) $ in Thousands		12 Months Ended
		Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2019
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue		$ 1,747,981	$ 2,792,189	$ 3,033,591
Assets		3,390,668	3,173,834	2,990,637
UNITED STATES
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	[1]	1,221,444	2,018,654	2,115,934
Assets		2,506,048	2,359,332	2,110,864
Foreign
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	[1]	526,537	773,535	917,657
Mexico
Segment Reporting, Revenue Reconciling Item [Line Items]
Assets		656,598	590,790	628,511
Europe
Segment Reporting, Revenue Reconciling Item [Line Items]
Assets		$ 228,022	$ 223,712	$ 251,262

[1] Revenue is presented on the basis of geographic location of customers.