Information for Pension Plans with Accumulated Benefit Obligation in Excess of Plan Assets (Detail) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2012	Aug. 31, 2011
Pension and Other Postretirement Benefits Disclosure [Line Items]
Projected benefit obligation	$ 190,320	$ 137,874
Accumulated benefit obligation	177,056	126,310
Fair value of plan assets	$ 133,430	$ 99,237

If aggregate disclosures are presented, the aggregate pension accumulated benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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If aggregate disclosures are presented, the aggregate fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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- Definition

If aggregate disclosures are presented, the aggregate projected benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

+ References+ Details