Discontinued Operations Operating Results, Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Oct. 31, 2013	Apr. 30, 2013	Oct. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	$ 6,505		$ 1,403
Discontinued Operation, Tax Effect of Discontinued Operation	(2,680)		(404)
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	9,185		1,807
Disposal Group, Including Discontinued Operations, Loss (Gain) on Write-down		(15,658)
Disposal Group, Including Discontinued Operation, Revenue	$ 67,413		$ 68,141

Disposal Group, Including Discontinued Operations, Loss (Gain) on Write-down

No definition available.

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- Definition

Overall income (loss) from a disposal group that is classified as a component of the entity, before income tax, reported as a separate component of income before extraordinary items. Includes the following (before income tax): 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.

+ References

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-Name Accounting Standards Codification

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- Definition

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.

+ References

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Amount of sales or other form of revenues attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.

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- Definition

Amount of income (loss) from a disposal group, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount allocable to noncontrolling interests. Includes, net of tax, 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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-Topic 810

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