XML 108 R74.htm IDEA: XBRL DOCUMENT v3.2.0.727

Property And Equipment (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2013
Property, Plant and Equipment [Line Items]
Depreciation expense for capitalized software	$ 9.0	$ 6.0	$ 4.0
Net book value of capitalized software	$ 28.7	$ 26.4

X

- Definition

For each income statement presented, the amount charged to expense for amortization of capitalized computer software costs.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 985



-SubTopic 20



-Section 50



-Paragraph 2



-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128487-111756



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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 985



-SubTopic 20



-Section 50



-Paragraph 1



-Subparagraph (b)



-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756

+ Details

Name:	us-gaap_CapitalizedComputerSoftwareAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The carrying amount of capitalized computer software costs net of accumulated amortization as of the balance sheet date.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 985



-SubTopic 20



-Section 50



-Paragraph 1



-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756



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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 985



-SubTopic 20



-Section 50



-Paragraph 2



-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128487-111756

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration