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Segment Information (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Oct. 31, 2022
USD ($)
Jul. 31, 2022
USD ($)
Oct. 31, 2021
USD ($)
Oct. 31, 2022
USD ($)
Segment
Oct. 31, 2021
USD ($)
Segment Reporting Information [Line Items]          
Number of reportable segments | Segment       3  
Revenue, net $ 514,836   $ 533,003 $ 1,002,405 $ 1,021,391
Adjusted contribution to profit 71,395   72,555 81,465 113,247
Depreciation and amortization 52,421   54,555 110,700 109,121
Accelerated amortization expense 0 $ 4,600 0 4,594 0
Operating Segments          
Segment Reporting Information [Line Items]          
Adjusted contribution to profit 114,896   118,386 173,633 203,872
Depreciation and amortization 48,511   50,425 102,634 100,854
Operating Segments | Research          
Segment Reporting Information [Line Items]          
Revenue, net 271,359   275,154 546,272 549,910
Adjusted contribution to profit 74,458   77,053 143,562 156,077
Depreciation and amortization 23,384   23,464 47,185 47,226
Operating Segments | Academic & Professional Learning          
Segment Reporting Information [Line Items]          
Revenue, net 152,641   176,529 285,600 315,793
Adjusted contribution to profit 33,850   40,606 35,225 48,929
Depreciation and amortization 16,152   18,148 32,684 36,512
Operating Segments | Education Services          
Segment Reporting Information [Line Items]          
Revenue, net 90,836   81,320 170,533 155,688
Adjusted contribution to profit 6,588   727 (5,154) (1,134)
Depreciation and amortization 8,975   8,813 22,765 17,116
Corporate, Non-Segment          
Segment Reporting Information [Line Items]          
Adjusted contribution to profit (43,501)   (45,831) (92,168) (90,625)
Depreciation and amortization $ 3,910   $ 4,130 $ 8,066 $ 8,267