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Valuation And Qualifying Accounts (Detail) - USD ($)
$ in Thousands

12 Months Ended

Apr. 30, 2015

Apr. 30, 2014

Apr. 30, 2013

Allowance for Doubtful Accounts

Valuation and Qualifying Accounts Disclosure [Line Items]

Balance at Beginning of Period

$ 9,513

$ 9,097

$ 9,437

Charges to Cost and Expenses

7,741

7,840

6,748

(Charges) Recoveries to Other Accounts

^[1]

(693)

291

(118)

Deductions

^[2]

(6,603)

(7,715)

(6,970)

Balance at End of Period

9,958

9,513

9,097

Valuation Allowance of Deferred Tax Assets

Valuation and Qualifying Accounts Disclosure [Line Items]

Balance at Beginning of Period

26,969

27,731

25,089

Charges to Cost and Expenses

2,537

3,728

5,678

Deductions

^[2]

(7,898)

(4,490)

(3,036)

Balance at End of Period

$ 21,608

$ 26,969

$ 27,731

[1]	Exchange rate fluctuations.
[2]	Allowance for doubtful accounts represents accounts written-off, net of recoveries and deferred tax asset valuation represents release of prior valuation allowances.

X

- Definition

Total of the adjustments in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 235



-SubTopic 10



-Section S99



-Paragraph 4



-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690



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



-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Section 09



-Article 12

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+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 235



-SubTopic 10



-Section S99



-Paragraph 4



-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690



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+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 235



-SubTopic 10



-Section S99



-Paragraph 4



-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690



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



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+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 235



-SubTopic 10



-Section S99



-Paragraph 4



-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690



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



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