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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 + Details
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