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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 |

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- Definition Goodwill and other intangible assets. + References No definition available. + Details
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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 + Details
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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. + Details
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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. + Details
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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 + Details
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