Summary of Changes in Accumulated Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014 Foreign currency translation adjustment	Feb. 28, 2014 Derivative instruments	Feb. 28, 2014 Actuarial loss	Aug. 31, 2013 Actuarial loss	Feb. 28, 2014 Prior service cost	Aug. 31, 2013 Prior service cost
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			$ 81,248		$ 125,594	$ (5,050)	$ (40,258)	$ (40,258)	$ 962	$ 962
Other comprehensive income before reclassifications			9,753		11,247	(1,494)
Amounts reclassified from accumulated other comprehensive income	1,510	1,422	3,570	381		3,570
Total other comprehensive income	657	5,734	13,323	12,349	11,247	2,076
Ending balance	$ 94,571		$ 94,571		$ 136,841	$ (2,974)	$ (40,258)	$ (40,258)	$ 962	$ 962

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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