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Summary of Restructuring Liability by Segment (Detail) - USD ($) $ in Thousands	Jan. 31, 2016	Oct. 31, 2015	Apr. 30, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 21,320	$ 665	$ 1,146
Asia Pacific
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	421
South America
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	186
Operating Segments | Executive Recruitment
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	4,913		473
Operating Segments | Executive Recruitment | North America
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	446		51
Operating Segments | Executive Recruitment | EMEA
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	3,860		422
Operating Segments | Hay Group
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	16,152		378
Operating Segments | Futurestep
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	173		291
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	82		4
Severance
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	20,262	156	375
Severance | Asia Pacific
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	421
Severance | South America
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	186
Severance | Operating Segments | Executive Recruitment
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	4,698		261
Severance | Operating Segments | Executive Recruitment | North America
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	427		51
Severance | Operating Segments | Executive Recruitment | EMEA
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	3,664		210
Severance | Operating Segments | Hay Group
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	15,431		58
Severance | Operating Segments | Futurestep
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	51		52
Severance | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	82		4
Facilities
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	1,058	$ 509	771
Facilities | Operating Segments | Executive Recruitment
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	215		212
Facilities | Operating Segments | Executive Recruitment | North America
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	19
Facilities | Operating Segments | Executive Recruitment | EMEA
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	196		212
Facilities | Operating Segments | Hay Group
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	721		320
Facilities | Operating Segments | Futurestep
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 122		$ 239

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+ References

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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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