Discontinued Operations - Carrying Amount of Assets Held for Sale in Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands	12 Months Ended
Apr. 30, 2015	Apr. 30, 2014	Jul. 02, 2014
Discontinued Operations and Disposal Groups [Abstract]
Total assets of discontinued operations		$ 42,937	$ 43,101
Loss on disposal of discontinued operations, net of tax, recognized in current period	$ (1,537)	(9,192)
Assets held for sale	$ 0	$ 33,745

Amount classified as assets attributable to disposal group held for sale or disposed of.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 45

-Paragraph 10

-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1107-107759

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- Definition

Amount classified as assets attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.

+ References

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- Definition

Amount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 45

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759

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- References

No definition available.

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