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Note 13 - Share-Based Compensation (Detail) - Share-Based Compensation (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Nov. 30, 2012	Nov. 30, 2011	Aug. 19, 2011	Nov. 30, 2011	Nov. 30, 2012
Share-based compensation	$ 342	$ 0	$ 16,233	$ 0	$ 856
Tax benefit	(139)	0	(5,682)	0	(333)
Share-based compensation, net	$ 203	$ 0	$ 10,551	$ 0	$ 523

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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