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Leases - Additional Information (Detail) $ in Thousands | 12 Months Ended
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Apr. 30, 2021 USD ($) | Apr. 30, 2020 USD ($) Facility | Apr. 30, 2019 USD ($)
Lessee Lease Description [Line Items] |  |  |
Lessee operating lease, existence of option to extend [true/false] | true |  |
Lessee operating lease, existence of option to terminate [true/false] | true |  |
Operating lease right-of-use assets, net | $ 174,121 | $ 195,077 |
Lease liability | $ 203,984 |  |
ROU assets, impairment charge |  | 2,282 |
Rent expense |  |  | $ 58,200
Acquired Companies |  |  |
Lessee Lease Description [Line Items] |  |  |
Operating lease right-of-use assets, net |  | 3,200 |
Lease liability |  | 6,700 |
ROU asset adjusted by reclassification of pre-existing prepaid expenses, restructuring liabilities and deferred rent |  | $ 3,500 |
Number of office leases closed | Facility |  | 16 |
ROU assets, impairment charge |  | $ 2,300 |
Minimum |  |  |
Lessee Lease Description [Line Items] |  |  |
Lessee operating lease, term of contract | 1 year |  |
Lessee finance lease, term of contract | 1 year |  |
Maximum |  |  |
Lessee Lease Description [Line Items] |  |  |
Lessee operating lease, term of contract | 11 years |  |
Lessee finance lease, term of contract | 5 years |  |

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- Definition Reclassification of prepaid expenses, restructuring liabilities and deferred rent to right of use assets. + References No definition available. + Details
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- Definition Term of lessee's finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980 + Details
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- Definition Indicates (true false) whether lessee has option to extend operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980 + Details
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- Definition Indicates (true false) whether lessee has option to terminate operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980 + Details
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- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980 + Details
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- Definition Amount of loss from impairment of right-of-use asset from operating lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 25 -Paragraph 6 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121593497&loc=SL77918431-209957 + Details
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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121573735&loc=d3e41499-112717 + Details
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