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Amortizable of Intangible Assets (Detail) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 130,233	$ 96,054
Less Accumulated Amortization	53,462	44,690
Net Carrying Amount	76,771	51,364
Licenses
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	16,913	10,346
Less Accumulated Amortization	4,580	3,330
Net Carrying Amount	12,333	7,016
Noncompete Agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,006	706
Less Accumulated Amortization	571	407
Net Carrying Amount	435	299
Patents
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	8,363	8,509
Less Accumulated Amortization	4,243	4,118
Net Carrying Amount	4,120	4,391
Customer-based intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	76,384	59,847
Less Accumulated Amortization	35,209	29,898
Net Carrying Amount	41,175	29,949
Other products and service-related intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	27,567	16,646
Less Accumulated Amortization	8,859	6,937
Net Carrying Amount	$ 18,708	$ 9,709

X

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 926
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-Section 50
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