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Summary of Restructuring Liability by Segment (Detail) (USD $) In Thousands, unless otherwise specified | Jul. 31, 2013 | Apr. 30, 2013
--- | --- | ---
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | $ 9,825 | $ 11,548
Corporate |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 258 | 449
Executive Recruitment |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 2,813 | 3,180
Executive Recruitment | North America |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 1,149 | 1,577
Executive Recruitment | EMEA |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 1,614 | 1,534
Executive Recruitment | Asia Pacific |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 50 | 69
LTC |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 4,625 | 6,453
Futurestep |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 2,129 | 1,466
Severance |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 2,706 | 4,819
Severance | Corporate |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 258 | 449
Severance | Executive Recruitment |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 1,191 | 1,596
Severance | Executive Recruitment | North America |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 594 | 918
Severance | Executive Recruitment | EMEA |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 550 | 678
Severance | Executive Recruitment | Asia Pacific |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 47 |
Severance | LTC |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 896 | 2,497
Severance | Futurestep |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 361 | 277
Facilities |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 7,119 | 6,729
Facilities | Executive Recruitment |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 1,622 | 1,584
Facilities | Executive Recruitment | North America |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 555 | 659
Facilities | Executive Recruitment | EMEA |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 1,064 | 856
Facilities | Executive Recruitment | Asia Pacific |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 3 | 69
Facilities | LTC |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 3,729 | 3,956
Facilities | Futurestep |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | $ 1,768 | $ 1,189

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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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