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Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jun. 30, 2019 | Jun. 30, 2018
Goodwill [Line Items] |  |
Balance-beginning of period | $ 270,678 | $ 250,342
Goodwill acquired | 51,638 | 18,956
Foreign currency translation | (2,538) | 973
Balance-end of period | 319,778 | 270,678
IPI |  |
Goodwill [Line Items] |  |
Goodwill adjustment for prior year acquisition - IPI |  | 407
I I V I Compound Semiconductors |  |
Goodwill [Line Items] |  |
Balance-beginning of period | 161,008 | 141,798
Goodwill acquired | 25,569 | 18,956
Foreign currency translation | (856) | 254
Balance-end of period | 185,721 | 161,008
I I V I Compound Semiconductors | IPI |  |
Goodwill [Line Items] |  |
Goodwill adjustment for prior year acquisition - IPI |  | 0
II-VI Photonics |  |
Goodwill [Line Items] |  |
Balance-beginning of period | 109,670 | 108,544
Goodwill acquired | 26,069 |
Foreign currency translation | (1,682) | 719
Balance-end of period | $ 134,057 | 109,670
II-VI Photonics | IPI |  |
Goodwill [Line Items] |  |
Goodwill adjustment for prior year acquisition - IPI |  | $ 407

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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- Definition Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=116868678&loc=d3e961-128460 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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