Quarterly report pursuant to Section 13 or 15(d)

Rollforward of Accrued Product Warranty Reserve (Detail)

v2.4.1.9
Rollforward of Accrued Product Warranty Reserve (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Nov. 30, 2014
Nov. 30, 2013
Movement in Standard Product Warranty Accrual [Roll Forward]    
Beginning balance $ 4,056us-gaap_ProductWarrantyAccrual $ 7,413us-gaap_ProductWarrantyAccrual
Provision for warranties 1,180us-gaap_ProductWarrantyAccrualWarrantiesIssued 230us-gaap_ProductWarrantyAccrualWarrantiesIssued
Warranty payments and costs incurred (1,424)us-gaap_ProductWarrantyAccrualPayments (1,232)us-gaap_ProductWarrantyAccrualPayments
Impact of changes in foreign currency rates (84)us-gaap_ProductWarrantyAccrualCurrencyTranslationIncreaseDecrease 53us-gaap_ProductWarrantyAccrualCurrencyTranslationIncreaseDecrease
Ending balance $ 3,728us-gaap_ProductWarrantyAccrual $ 6,464us-gaap_ProductWarrantyAccrual