Accounts Payable and Accrued Liabilities - Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Thousands	Feb. 28, 2021	Nov. 30, 2020	Aug. 31, 2020	Feb. 29, 2020	Nov. 30, 2019	Aug. 31, 2019
Payables And Accruals [Abstract]
Trade payables	$ 146,017		$ 148,971
Other accrued liabilities	104,604		100,168
Operating lease liabilities	58,162		64,509
Accrued payroll and related liabilities	97,099		105,008
Accrued warranty	42,689	$ 45,620	45,224	$ 46,850	$ 47,110	$ 46,678
Accounts payable and accrued liabilities	$ 448,571		$ 463,880