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Summary of Restructuring Liability by Segment (Detail) - USD ($) $ in Thousands	Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 1,146	$ 2,813	$ 11,548
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	4
Executive Recruitment
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	473	572
Executive Recruitment | North America
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	51	193
Executive Recruitment | EMEA
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	422	379
LTC
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	378	1,587
Futurestep
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	291	654
Severance
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	375		4,819
Severance | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	4
Severance | Executive Recruitment
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	261
Severance | Executive Recruitment | North America
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	51
Severance | Executive Recruitment | EMEA
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	210
Severance | LTC
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	58
Severance | Futurestep
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	52
Facilities
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	771	2,813	$ 6,729
Facilities | Executive Recruitment
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	212	572
Facilities | Executive Recruitment | North America
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve		193
Facilities | Executive Recruitment | EMEA
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	212	379
Facilities | LTC
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	320	1,587
Facilities | Futurestep
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 239	$ 654

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- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 420



-SubTopic 10



-Section S99



-Paragraph 2



-Subparagraph (SAB TOPIC 5.P.4(b))



-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747



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



-Publisher SEC



-Name Staff Accounting Bulletin (SAB)



-Number Topic 5



-Section P



-Subsection 3, 4

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