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Warranty Accruals - Warranty Accruals Activity (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Feb. 28, 2018
Feb. 28, 2017
Feb. 28, 2018
Feb. 28, 2017
Product Liability Contingency [Line Items]        
Balance at beginning of period $ 21,952 $ 11,737 $ 20,737 $ 12,159
Charged to cost of revenue, net 5,646 3,288 7,599 3,645
Payments (1,089) (495) (1,840) (1,132)
Currency translation effect 468 52 481 (90)
Balance at end of period $ 26,977 $ 14,582 $ 26,977 $ 14,582