Other Expense (Income), Net (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended	9 Months Ended
Feb. 28, 2013	Nov. 30, 2012	Aug. 31, 2012	Feb. 29, 2012	Nov. 30, 2012	Feb. 28, 2013	Feb. 29, 2012
Component of Other Income, Nonoperating [Line Items]
Royalty (income), net	$ (848)			$ (438)		$ (1,574)	$ (1,175)
Loss on Brazil operational repositioning	6,087					6,087
Loss on Kemrock conversion option		(800)	(8,200)		(9,000)	9,030
(Income) loss related to unconsolidated equity affiliates	(525)			(961)		40,287	(7,194)
Other expense (income), net	$ 4,714			$ (1,399)		$ 53,830	$ (8,369)

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details