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Provision for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	May 31, 2013	May 31, 2012	May 31, 2011
Current:
U.S. Taxes	$ 12,959	$ 9,520	$ 9,336
Foreign	854	587	811
Deferred	287	1,340	2,253
Income taxes	$ 14,100	$ 11,450	$ 12,400

X

- Definition

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of current foreign income tax expense (benefit) pertaining to income (loss) from continuing operations.

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