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Summary of Restructuring Liability by Segment (Detail) (USD $) In Thousands, unless otherwise specified | Jul. 31, 2014 | Apr. 30, 2014
--- | --- | ---
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | $ 8,644 | $ 2,813
Executive Recruitment |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 4,361 | 572
Executive Recruitment | North America |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 925 | 193
Executive Recruitment | EMEA |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 3,199 | 379
Executive Recruitment | Asia Pacific |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 9 |
Executive Recruitment | South America |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 228 |
LTC |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 2,945 | 1,587
Futurestep |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 1,292 | 654
Corporate |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 46 |
Severance |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 6,182 |
Severance | Executive Recruitment |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 3,785 |
Severance | Executive Recruitment | North America |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 886 |
Severance | Executive Recruitment | EMEA |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 2,662 |
Severance | Executive Recruitment | Asia Pacific |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 9 |
Severance | Executive Recruitment | South America |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 228 |
Severance | LTC |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 1,529 |
Severance | Futurestep |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 822 |
Severance | Corporate |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 46 |
Facilities |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 2,462 | 2,813
Facilities | Executive Recruitment |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 576 | 572
Facilities | Executive Recruitment | North America |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 39 | 193
Facilities | Executive Recruitment | EMEA |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 537 | 379
Facilities | LTC |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 1,416 | 1,587
Facilities | Futurestep |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | $ 470 | $ 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 + Details
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