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Goodwill and Intangible Assets, Intangible Assets (Details) - USD ($) $ in Thousands | Jan. 31, 2021 | Apr. 30, 2020
--- | --- | ---
Intangible Assets with Definite Lives, net [Abstract] |  |  |
Total |  | $ 893,963 | $ 686,069
Intangible Assets with Indefinite Lives [Abstract] |  |  |
Total |  | 130,924 | 121,336
Intangible assets (excluding goodwill) [Abstract] |  |  |
Total Intangible Assets, Net |  | 1,024,887 | 807,405
Brands and Trademarks [Member] |  |  |
Intangible Assets with Indefinite Lives [Abstract] |  |  |
Total |  | 37,000 | 37,000
Content and Publishing Rights [Member] |  |  |
Intangible Assets with Indefinite Lives [Abstract] |  |  |
Total |  | 93,924 | 84,336
Content and Publishing Rights [Member] |  |  |
Intangible Assets with Definite Lives, net [Abstract] |  |  |
Total | [1] | 561,888 | 362,106
Customer Relationships [Member] |  |  |
Intangible Assets with Definite Lives, net [Abstract] |  |  |
Total | [1] | 274,398 | 290,418
Developed Technology [Member] |  |  |
Intangible Assets with Definite Lives, net [Abstract] |  |  |
Total | [1] | 37,248 | 13,111
Brands and Trademarks [Member] |  |  |
Intangible Assets with Definite Lives, net [Abstract] |  |  |
Total | [1] | 20,331 | 20,188
Covenants Not to Compete [Member] |  |  |
Intangible Assets with Definite Lives, net [Abstract] |  |  |
Total |  | $ 98 | $ 246
[1] | Refer to Note 3, “Acquisitions,” for more information related to the acquisition that occurred in fiscal year 2021 and the revisions that were made to the allocation of the consideration transferred to the assets acquired and liabilities assumed during the nine months ended January 31, 2021 related to the fiscal year 2020 acquisitions.

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- Definition Amount of assets, net of accumulated impairment, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. + References No definition available. + Details
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