Goodwill and Intangible Assets - Narrative (Detail) $ in Thousands	3 Months Ended
Aug. 31, 2020 USD ($) segment	Aug. 31, 2019 USD ($)
Finite-Lived Intangible Assets [Line Items]
Number of reporting units \| segment	1
Amortization of intangibles \| $	$ 4,953	$ 3,868
Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets other than goodwill	2 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets other than goodwill	18 years

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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