Summary of Changes in Other Comprehensive Income Included Within Shareholders Equity (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Aug. 31, 2013	Aug. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	$ (1,789)	$ (2,587)
Other comprehensive income before tax	(777)	2,062
Non-controlling interest	18	(17)
Balance, end of period	(2,548)	(542)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	(3,532)	(4,593)
Other comprehensive income before tax	(929)	3,038
Non-controlling interest	18	(17)
Balance, end of period	(4,443)	(1,572)
Foreign Currency Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	2,004	2,678
Other comprehensive income before tax	(362)	(112)
Balance, end of period	1,642	2,566
Tax Provision
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	(261)	(672)
Other comprehensive income before tax	514	(864)
Balance, end of period	$ 253	$ (1,536)

- 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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