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Cash And Marketable Securities - Marketable Securities (Detail) - USD ($) $ in Thousands	Nov. 30, 2021	May 31, 2021
Marketable Securities, Current	$ 338,130	$ 305,485
Commercial Paper | Maturing in 0 - 90 days
Marketable Securities, Current	79,830	106,631
Commercial Paper | Maturing in 91 - 180 days
Marketable Securities, Current	88,246	78,727
Commercial Paper | Maturing in 181 days - 1 year
Marketable Securities, Current	64,526	87,590
Commercial Paper | Maturing in 1 - 2 years
Marketable Securities, Current	104,275	26,752
Certificates of Deposit | Maturing in 0 - 90 days
Marketable Securities, Current	1,002	3,262
Certificates of Deposit | Maturing in 91 - 180 days
Marketable Securities, Current	251	1,260
Certificates of Deposit | Maturing in 181 days - 1 year
Marketable Securities, Current	0	1,263
Certificates of Deposit | Maturing in 1 - 2 years
Marketable Securities, Current	$ 0	$ 0

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- Definition

Amount of investment in marketable security, classified as current.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.2)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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