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Warranty Accruals - Warranty Accrual Activity (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Feb. 29, 2020
Feb. 28, 2019
Feb. 29, 2020
Feb. 28, 2019
Guarantees And Product Warranties [Abstract]        
Balance at beginning of period $ 47,110 $ 26,264 $ 46,678 $ 27,395
Charged to cost of revenue, net 884 1,412 3,262 2,853
Payments (1,136) (2,612) (3,135) (4,796)
Currency translation effect (8) (70) 45 (458)
Balance at end of period $ 46,850 $ 24,994 $ 46,850 $ 24,994