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Segment Information (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Oct. 31, 2024
USD ($)
segment
Oct. 31, 2023
USD ($)
Oct. 31, 2024
USD ($)
Oct. 31, 2023
USD ($)
Segment Reporting [Abstract]        
Number of reportable segments | segment 3      
Segment Reporting Information [Line Items]        
Revenue: $ 426,595 $ 492,808 $ 830,404 $ 943,821
Adjusted Operating Income (Loss): 114,339 117,868 189,536 182,105
Depreciation and Amortization: 36,718 40,174 73,971 83,902
Operating Segments        
Segment Reporting Information [Line Items]        
Adjusted Operating Income (Loss): 114,339 117,868 189,536 182,105
Depreciation and Amortization: 33,419 36,642 67,272 76,843
Operating Segments | Research        
Segment Reporting Information [Line Items]        
Revenue: 261,885 257,670 527,194 515,474
Adjusted Operating Income (Loss): 59,527 58,856 114,743 112,383
Depreciation and Amortization: 22,522 22,668 45,081 45,880
Operating Segments | Learning        
Segment Reporting Information [Line Items]        
Revenue: 161,514 148,940 285,828 258,260
Adjusted Operating Income (Loss): 55,871 39,912 78,371 47,538
Depreciation and Amortization: 10,897 13,974 22,191 27,526
Operating Segments | Held for Sale or Sold        
Segment Reporting Information [Line Items]        
Revenue: 3,196 86,198 17,382 170,087
Adjusted Operating Income (Loss): (1,059) 19,100 (3,578) 22,184
Depreciation and Amortization: 0 0 0 3,437
Corporate Expenses        
Segment Reporting Information [Line Items]        
Depreciation and Amortization: $ 3,299 $ 3,532 $ 6,699 $ 7,059