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Goodwill and Intangible Assets, Intangible Assets (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Apr. 30, 2021
Intangible assets with definite lives, net [Abstract]
Intangible assets with definite lives, net	$ 867,156	$ 885,261	[1]
Intangible assets with indefinite lives [Abstract]
Intangible assets with indefinite lives	128,457	130,041	[1]
Intangible assets (excluding goodwill) [Abstract]
Total intangible assets, net	995,613	1,015,302	[1]
Brands and Trademarks [Member]
Intangible assets with indefinite lives [Abstract]
Intangible assets with indefinite lives	37,000	37,000	[1]
Accumulated impairment		93,100
Content and Publishing Rights [Member]
Intangible assets with indefinite lives [Abstract]
Intangible assets with indefinite lives	91,457	93,041	[1]
Content and Publishing Rights [Member]
Intangible assets with definite lives, net [Abstract]
Intangible assets with definite lives, net	552,624	564,229	[1]
Customer Relationships [Member]
Intangible assets with definite lives, net [Abstract]
Intangible assets with definite lives, net	259,158	266,477	[1]
Developed Technology [Member]
Intangible assets with definite lives, net [Abstract]
Intangible assets with definite lives, net	36,667	34,961	[1]
Accumulated impairment		2,800
Brands and Trademarks [Member]
Intangible assets with definite lives, net [Abstract]
Intangible assets with definite lives, net	18,684	19,536	[1]
Covenants Not to Compete [Member]
Intangible assets with definite lives, net [Abstract]
Intangible assets with definite lives, net	$ 23	$ 58	[1]
[1] The developed technology balance as of April 30, 2021 is presented net of accumulated impairments and write-offs of $2.8 million. The indefinite-lived brands and trademarks as of April 30, 2021 is net of accumulated impairments of $93.1 million.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 926
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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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