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Goodwill and Intangible Assets, Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Apr. 30, 2020 | Apr. 30, 2021
Intangible assets with definite lives, net [Abstract] |  |  |
Cost | [1] | $ 1,248,291 | $ 1,536,199
Accumulated amortization | [1] | (559,381) | (650,938)
Accumulated impairment | [1] | (2,841) |
Total | [1] | 686,069 | 885,261
Intangible assets with indefinite lives [Abstract] |  |  |
Cost |  | 214,443 | 130,041
Accumulated impairment |  | (93,107) |
Total |  | 121,336 | 130,041
Intangible assets (excluding goodwill) [Abstract] |  |  |
Cost |  | 1,462,734 | 1,666,240
Accumulated impairment |  | (95,948) |
Total Intangible Assets, Net |  | 807,405 | 1,015,302
Brands and Trademarks [Member] |  |  |
Intangible assets with indefinite lives [Abstract] |  |  |
Cost | [2] | 130,107 | 37,000
Accumulated impairment | [2] | (93,107) |
Total | [2] | 37,000 | 37,000
Content and Publishing Rights [Member] |  |  |
Intangible assets with indefinite lives [Abstract] |  |  |
Cost |  | 84,336 | 93,041
Accumulated impairment |  | 0 |
Total |  | 84,336 | 93,041
Brands [Member] |  |  |
Intangible assets (excluding goodwill) [Abstract] |  |  |
Impairment charges (BW in FY20) |  | 89,500 |
Content and Publishing Rights [Member] |  |  |
Intangible assets with definite lives, net [Abstract] |  |  |
Cost |  | 806,862 | 1,062,072
Accumulated amortization |  | (444,756) | (497,843)
Accumulated impairment |  | 0 |
Total |  | 362,106 | 564,229
Customer Relationships [Member] |  |  |
Intangible assets with definite lives, net [Abstract] |  |  |
Cost |  | 377,652 | 384,462
Accumulated amortization |  | (87,234) | (117,985)
Accumulated impairment |  | 0 |
Total |  | 290,418 | 266,477
Developed Technology [Member] |  |  |
Intangible assets with definite lives, net [Abstract] |  |  |
Cost | [2] | 19,225 | 42,785
Accumulated amortization | [2] | (3,273) | (7,824)
Accumulated impairment | [2] | (2,841) |
Total | [2] | 13,111 | 34,961
Brands and Trademarks [Member] |  |  |
Intangible assets with definite lives, net [Abstract] |  |  |
Cost |  | 42,877 | 45,630
Accumulated amortization |  | (22,689) | (26,094)
Accumulated impairment |  | 0 |
Total |  | 20,188 | 19,536
Covenants Not to Compete [Member] |  |  |
Intangible assets with definite lives, net [Abstract] |  |  |
Cost |  | 1,675 | 1,250
Accumulated amortization |  | (1,429) | (1,192)
Accumulated impairment |  | 0 |
Total |  | $ 246 | $ 58
[1] | Refer to Note 4, “Acquisitions,” for more information related to the acquisitions that occurred in 2021 and 2020.
[2] | 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 cost balance as of April 30, 2021 is net of accumulated impairments of $93.1 million.

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