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Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017
Goodwill [Line Items] |  |
Balance-beginning of period | $ 250,342 | $ 233,755
Goodwill acquired | 18,956 | 17,107
Foreign currency translation | 973 | (520)
Balance-end of period | 270,678 | 250,342
IPI |  |
Goodwill [Line Items] |  |
Balance-beginning of period | 17,514 |
Goodwill adjustment for prior year acquisition - IPI | 407 |
Balance-end of period |  | 17,514
II-VI Laser Solutions |  |
Goodwill [Line Items] |  |
Balance-beginning of period | 84,180 | 84,105
Goodwill acquired | 18,956 |
Foreign currency translation | 254 | 75
Balance-end of period | 103,390 | 84,180
II-VI Photonics |  |
Goodwill [Line Items] |  |
Balance-beginning of period | 113,272 | 96,760
Goodwill acquired |  | 17,107
Foreign currency translation | 719 | (595)
Balance-end of period | 114,398 | 113,272
II-VI Photonics | IPI |  |
Goodwill [Line Items] |  |
Balance-beginning of period | 17,500 |
Goodwill adjustment for prior year acquisition - IPI | 407 |
Balance-end of period |  | 17,500
II- VI Performance Products |  |
Goodwill [Line Items] |  |
Balance-beginning of period | 52,890 | 52,890
Balance-end of period | $ 52,890 | $ 52,890

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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=84229725&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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