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Disaggregated Revenue by Geographic Location (Detail) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2018
Revenues by Geographic Location [Line Items]
Total revenue	$ 418,170	$ 414,186	$ 397,930
Domestic
Revenues by Geographic Location [Line Items]
Total revenue	253,458	248,304
International
Revenues by Geographic Location [Line Items]
Total revenue	$ 164,712	$ 165,882

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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