Current and Noncurrent Net Deferred Tax Assets (Detail) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013	Aug. 31, 2012
Income Tax Disclosure [Abstract]
Current deferred tax assets	$ 46,260	$ 27,833
Current deferred tax liabilities	(6,253)	(3,955)
Noncurrent deferred tax assets	94,069	73,411
Noncurrent deferred tax liabilities	(73,173)	(24,245)
Net deferred tax assets	$ 60,903	$ 73,044

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards expected to be realized or consumed within one year or operating cycle, if longer.

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Amount after allocation of valuation allowances of noncurrent deferred tax asset attributable to deductible temporary differences and carryforwards. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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- Definition

Amount of deferred tax liability attributable to taxable temporary differences, net of deferred tax asset attributable to deductible temporary differences and carryforwards net of valuation allowances expected to be realized or consumed within one year or operating cycle, if longer.

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