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Consolidated Condensed Statements of Income (Unaudited) (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Feb. 28, 2015	Feb. 28, 2015
Income Statement [Abstract]
Discontinued operations, income tax expense	$ 53	$ 12,204
Investment, income tax benefit	$ 4,010	$ 4,162

Tax effect allocated to a disposal group that is classified as a component of the entity reported as a separate component of income before extraordinary items. Includes the tax effects of the following: income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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