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Goodwill and Intangible Assets - Changes in Carrying Value of Goodwill By Reportable Segment (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 30, 2020 | Apr. 30, 2019
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | $ 578,298 | $ 584,222
Additions | 38,926 |
Exchange rate fluctuations | (3,281) | (5,924)
Goodwill, Ending Balance | 613,943 | 578,298
Operating Segments | Consulting |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 173,147 | 173,453
Exchange rate fluctuations | (133) | (306)
Goodwill, Ending Balance | 173,014 | 173,147
Operating Segments | Executive Search |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 93,023 | 96,230
Exchange rate fluctuations | (1,836) | (3,207)
Goodwill, Ending Balance | 91,187 | 93,023
Operating Segments | Executive Search | North America |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 46,571 | 47,757
Exchange rate fluctuations | (850) | (1,186)
Goodwill, Ending Balance | 45,721 | 46,571
Operating Segments | Executive Search | EMEA |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 45,480 | 47,501
Exchange rate fluctuations | (986) | (2,021)
Goodwill, Ending Balance | 44,494 | 45,480
Operating Segments | Executive Search | Asia Pacific |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 972 | 972
Goodwill, Ending Balance | 972 | 972
Operating Segments | Digital |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 284,214 | 284,716
Additions | 38,926 |
Exchange rate fluctuations | (413) | (502)
Goodwill, Ending Balance | 322,727 | 284,214
Operating Segments | RPO & Professional Search |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 27,914 | 29,823
Exchange rate fluctuations | (899) | (1,909)
Goodwill, Ending Balance | $ 27,015 | $ 27,914

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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