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Changes in Carrying Amount of Goodwill (Detail) $ in Thousands | 9 Months Ended
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Mar. 31, 2018 USD ($)
Goodwill [Line Items] |
Balance-beginning of period | $ 250,342
Goodwill acquired | 19,198
Foreign currency translation | 4,569
Balance-end of period | 274,516
IPI |
Goodwill [Line Items] |
Balance-beginning of period | 17,514
Goodwill adjustment for prior year acquisition - IPI | 407
II-VI Laser Solutions |
Goodwill [Line Items] |
Balance-beginning of period | 84,180
Goodwill acquired | 19,198
Foreign currency translation | 2,235
Balance-end of period | 105,613
II-VI Photonics |
Goodwill [Line Items] |
Balance-beginning of period | 113,272
Foreign currency translation | 2,334
Balance-end of period | 116,013
II-VI Photonics | IPI |
Goodwill [Line Items] |
Balance-beginning of period | 17,500
Goodwill adjustment for prior year acquisition - IPI | 407
II- VI Performance Products |
Goodwill [Line Items] |
Balance-beginning of period | 52,890
Balance-end of period | $ 52,890

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