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Segment Information (Details)
$ in Thousands
 3 Months Ended
Jul. 31, 2024
USD ($)
segment
Jul. 31, 2023
USD ($)
Segment Reporting [Abstract]    
Number of reportable segments | segment 3  
Segment Reporting Information [Line Items]    
Revenue, net $ 403,809 $ 451,013
Adjusted Operating Income (Loss): 75,197 64,237
Depreciation and amortization 37,253 43,728
Operating Segments    
Segment Reporting Information [Line Items]    
Adjusted Operating Income (Loss): 75,197 64,237
Depreciation and amortization 33,853 40,201
Operating Segments | Research:    
Segment Reporting Information [Line Items]    
Revenue, net 265,309 257,804
Adjusted Operating Income (Loss): 55,216 53,527
Depreciation and amortization 22,559 23,212
Operating Segments | Learning:    
Segment Reporting Information [Line Items]    
Revenue, net 124,314 109,320
Adjusted Operating Income (Loss): 22,500 7,626
Depreciation and amortization 11,294 13,552
Operating Segments | Held for Sale or Sold    
Segment Reporting Information [Line Items]    
Revenue, net 14,186 83,889
Adjusted Operating Income (Loss): (2,519) 3,084
Depreciation and amortization 0 3,437
Corporate Nonsegment    
Segment Reporting Information [Line Items]    
Depreciation and amortization $ 3,400 $ 3,527