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Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands | Feb. 28, 2021 | May 31, 2020
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Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying value, finite intangible items | $ 331,185 | $ 327,966
Accumulated amortization | (144,969) | (130,830)
Net carrying value, finite intangible items | 186,216 | 197,136
Product technologies |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying value, finite intangible items | 254,675 | 251,569
Accumulated amortization | (99,066) | (88,547)
Net carrying value, finite intangible items | 155,609 | 163,022
Customer relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying value, finite intangible items | 60,273 | 60,160
Accumulated amortization | (33,142) | (30,018)
Net carrying value, finite intangible items | 27,131 | 30,142
Trademarks |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying value, finite intangible items | 10,150 | 10,150
Accumulated amortization | (6,931) | (6,691)
Net carrying value, finite intangible items | 3,219 | 3,459
Licenses |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying value, finite intangible items | 6,087 | 6,087
Accumulated amortization | (5,830) | (5,574)
Net carrying value, finite intangible items | $ 257 | $ 513

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- 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 + Details
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- Definition Amount before 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 928 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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