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Other (Income), Net (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Aug. 31, 2014	Aug. 31, 2013
Component Of Other Expense Income Nonoperating [Line Items]
Royalty (income) expense, net	$ (1,217)	$ 318
(Income) related to unconsolidated equity affiliates	(605)	(752)
Other (income), net	$ (1,822)	$ (434)

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.

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