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Summary of Restructuring Liability by Segment (Detail) - USD ($) $ in Thousands | Jan. 31, 2017 | Oct. 31, 2016 | Apr. 30, 2016
--- | --- | --- | ---
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | $ 12,561 | $ 11,931 | $ 5,962
Operating Segments | Executive Search |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | 1,563 |  | 1,594
Operating Segments | Executive Search | North America |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | 359 |  | 5
Operating Segments | Executive Search | EMEA |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | 12 |  | 1,556
Operating Segments | Executive Search | Asia Pacific |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | 1,047 |  | 33
Operating Segments | Executive Search | Latin America |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | 145 |  |
Operating Segments | Hay Group |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | 10,857 |  | 4,123
Operating Segments | Futurestep |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | 141 |  | 245
Severance |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | 3,034 | 5,005 | 5,293
Severance | Operating Segments | Executive Search |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | 148 |  | 1,566
Severance | Operating Segments | Executive Search | North America |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | 143 |  |
Severance | Operating Segments | Executive Search | EMEA |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve |  |  | 1,533
Severance | Operating Segments | Executive Search | Asia Pacific |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | 5 |  | 33
Severance | Operating Segments | Hay Group |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | 2,886 |  | 3,727
Facilities |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | 9,527 | $ 6,926 | 669
Facilities | Operating Segments | Executive Search |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | 1,415 |  | 28
Facilities | Operating Segments | Executive Search | North America |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | 216 |  | 5
Facilities | Operating Segments | Executive Search | EMEA |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | 12 |  | 23
Facilities | Operating Segments | Executive Search | Asia Pacific |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | 1,042 |  |
Facilities | Operating Segments | Executive Search | Latin America |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | 145 |  |
Facilities | Operating Segments | Hay Group |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | 7,971 |  | 396
Facilities | Operating Segments | Futurestep |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | $ 141 |  | $ 245

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