Goodwill and other intangible assets.

No definition available.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472

+ Details

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- Definition

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.

+ References

No definition available.

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- Definition

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

+ References

No definition available.

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- Definition

Carrying amount (original costs adjusted for previously recognized amortization and impairment) as of the balance sheet date for the rights acquired through registration of a trade name to gain or protect exclusive use thereof for a projected indefinite period of benefit.

+ References

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

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Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Goodwill And Other Intangible Assets [Line Items]
Amortization expense recorded on intangible assets	$ 3.6	$ 3.1	$ 11.0	$ 9.5
Carrying amount of indefinite trade names acquired	14.3		$ 14.3
Technology and Patents
Goodwill And Other Intangible Assets [Line Items]
Remaining amortization period of patents and customer lists, in months			93 months
Technology and Patents \| Minimum
Goodwill And Other Intangible Assets [Line Items]
Amortization period of finite lived intangible assets, in months			60 months
Technology and Patents \| Maximum
Goodwill And Other Intangible Assets [Line Items]
Amortization period of finite lived intangible assets, in months			240 months
Technology and Patents \| II-VI Compound Semiconductors Ltd
Goodwill And Other Intangible Assets [Line Items]
Identifiable intangibles assets recorded in connection with acquisitions	0.4		$ 0.4
Customer Lists
Goodwill And Other Intangible Assets [Line Items]
Remaining amortization period of patents and customer lists, in months			142 months
Customer Lists \| Minimum
Goodwill And Other Intangible Assets [Line Items]
Amortization period of finite lived intangible assets, in months			120 months
Customer Lists \| Maximum
Goodwill And Other Intangible Assets [Line Items]
Amortization period of finite lived intangible assets, in months			240 months
Customer Lists \| II-VI Compound Semiconductors Ltd
Goodwill And Other Intangible Assets [Line Items]
Identifiable intangibles assets recorded in connection with acquisitions	$ 3.6		$ 3.6