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Intangible Assets (Detail) - USD ($) $ in Thousands	Apr. 30, 2016	Apr. 30, 2015
Intangible Assets [Line Items]
Amortized intangible assets, Gross	$ 167,351	$ 73,151
Amortized intangible assets, Accumulated Amortization	(40,707)	(29,023)
Amortized intangible assets, Net	126,644	44,128
Exchange rate fluctuations	383	(27)
Total Intangible assets	233,027	47,901
Trademarks
Intangible Assets [Line Items]
Amortized intangible assets, Gross	3,986	3,986
Amortized intangible assets, Accumulated Amortization	(3,986)	(3,291)
Amortized intangible assets, Net		695
Unamortized intangible assets	106,000	3,800
Customer Lists
Intangible Assets [Line Items]
Amortized intangible assets, Gross	125,099	41,099
Amortized intangible assets, Accumulated Amortization	(19,910)	(12,578)
Amortized intangible assets, Net	105,189	28,521
Intellectual Property
Intangible Assets [Line Items]
Amortized intangible assets, Gross	33,100	22,900
Amortized intangible assets, Accumulated Amortization	(13,281)	(10,130)
Amortized intangible assets, Net	19,819	12,770
Database Rights
Intangible Assets [Line Items]
Amortized intangible assets, Gross	4,256	4,256
Amortized intangible assets, Accumulated Amortization	(2,777)	(2,351)
Amortized intangible assets, Net	1,479	1,905
Non-compete Agreements
Intangible Assets [Line Items]
Amortized intangible assets, Gross	910	910
Amortized intangible assets, Accumulated Amortization	(753)	(673)
Amortized intangible assets, Net	$ 157	$ 237

X

- Definition

The accumulated foreign exchange gain/(loss) included in intangible assets.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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-Publisher FASB
-Name Accounting Standards Codification
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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

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-Name Accounting Standards Codification
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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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