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Goodwill and Intangible Assets (Details 1) - USD ($) $ in Thousands	May 31, 2018	May 31, 2017
Indefinite-lived Intangible Assets [Line Items]
Gross carrying value, finite-lived intangible assets	$ 239,005	$ 237,684
Accumulated amortization	(108,695)	(92,009)
Net carrying value, finite-lived intangible assets	130,310	145,675
Product technologies
Indefinite-lived Intangible Assets [Line Items]
Gross carrying value, finite-lived intangible assets	147,175	147,172
Accumulated amortization	(68,880)	(59,696)
Net carrying value, finite-lived intangible assets	78,295	87,476
Customer relationships
Indefinite-lived Intangible Assets [Line Items]
Gross carrying value, finite-lived intangible assets	56,428	56,375
Accumulated amortization	(23,237)	(19,194)
Net carrying value, finite-lived intangible assets	33,191	37,181
Trademarks
Indefinite-lived Intangible Assets [Line Items]
Gross carrying value, finite-lived intangible assets	28,400	28,400
Accumulated amortization	(11,809)	(9,069)
Net carrying value, finite-lived intangible assets	16,591	19,331
Licenses
Indefinite-lived Intangible Assets [Line Items]
Gross carrying value, finite-lived intangible assets	5,752	4,487
Accumulated amortization	(4,357)	(3,821)
Net carrying value, finite-lived intangible assets	1,395	666
Distributor relationships
Indefinite-lived Intangible Assets [Line Items]
Gross carrying value, finite-lived intangible assets	1,250	1,250
Accumulated amortization	(412)	(229)
Net carrying value, finite-lived intangible assets	$ 838	$ 1,021

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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
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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
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