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Fee Revenue - Schedule of Disaggregation of Fee Revenue by Industry (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Oct. 31, 2024 | Oct. 31, 2023 | Oct. 31, 2024 | Oct. 31, 2023
Disaggregation Of Revenue [Line Items] |  |  |  |
Fee revenue | $ 681,960 | $ 712,447 | $ 1,364,721 | $ 1,418,709
Industrial |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Fee revenue | $ 208,012 | $ 204,931 | $ 406,784 | $ 406,849
Fee revenue, percentage | 30.90% | 29.10% | 30.10% | 29.00%
Financial Services |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Fee revenue | $ 126,110 | $ 122,048 | $ 251,247 | $ 250,372
Fee revenue, percentage | 18.70% | 17.30% | 18.60% | 17.90%
Life Sciences/Healthcare |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Fee revenue | $ 112,598 | $ 123,865 | $ 231,588 | $ 243,219
Fee revenue, percentage | 16.70% | 17.60% | 17.20% | 17.30%
Technology |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Fee revenue | $ 96,017 | $ 98,129 | $ 193,937 | $ 213,902
Fee revenue, percentage | 14.20% | 13.90% | 14.40% | 15.20%
Consumer Goods |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Fee revenue | $ 88,498 | $ 96,996 | $ 173,645 | $ 193,423
Fee revenue, percentage | 13.10% | 13.80% | 12.90% | 13.80%
Education/Non–Profit/General |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Fee revenue | $ 43,130 | $ 58,034 | $ 92,110 | $ 95,427
Fee revenue, percentage | 6.40% | 8.30% | 6.80% | 6.80%
Fee revenue |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Fee revenue | $ 674,365 | $ 704,003 | $ 1,349,311 | $ 1,403,192
Fee revenue, percentage | 100.00% | 100.00% | 100.00% | 100.00%

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