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Changes in Carrying Amount of Goodwill (Detail) $ in Thousands | 6 Months Ended
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Dec. 31, 2017 USD ($)
Goodwill [Line Items] |
Balance-beginning of period | $ 250,342
Goodwill acquired | 19,670
Foreign currency translation | 1,801
Balance-end of period | 272,209
IPI |
Goodwill [Line Items] |
Balance-beginning of period | 17,503
Goodwill adjustment for prior year acquisition - IPI | 396
II-VI Laser Solutions |
Goodwill [Line Items] |
Balance-beginning of period | 84,180
Goodwill acquired | 19,670
Foreign currency translation | 691
Balance-end of period | 104,541
II-VI Photonics |
Goodwill [Line Items] |
Balance-beginning of period | 113,272
Foreign currency translation | 1,110
Balance-end of period | 114,778
II-VI Photonics | IPI |
Goodwill [Line Items] |
Balance-beginning of period | 17,500
Goodwill adjustment for prior year acquisition - IPI | 396
II- VI Performance Products |
Goodwill [Line Items] |
Balance-beginning of period | 52,890
Balance-end of period | $ 52,890

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