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Segment Information - Total Assets by Segment (Details) - USD ($) $ in Thousands	Apr. 30, 2023	Apr. 30, 2022
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 3,108,810	$ 3,361,695
Operating Segments | Research
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	1,521,450	1,593,297
Operating Segments | Academic
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	870,586	1,023,887
Operating Segments | Talent
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	394,866	413,137
Corporate Expenses
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 321,908	$ 331,374

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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