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Long-term Investments - Additional Information (Details) - USD ($) $ in Thousands | 12 Months Ended
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May 31, 2021 | May 31, 2020 | May 31, 2019
Investments Debt And Equity Securities [Abstract] |  |  |
Proceeds on sale of investments | $ 8,430 | $ 19,570 | $ 83,343
Unrealized losses on change in fair value of investments | $ 1,567 | $ 23,057 | $ 8,122

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- Definition Unrealized losses on change in fair value of investments. + References No definition available. + Details
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- References No definition available. + Details
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- Definition The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585 + Details
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