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Revenue from Contracts with Customers - Summary of Disaggregated Revenue by Revenue Market and Product (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue | $ 342,839 | $ 281,470 | $ 657,272 | $ 542,973
II-VI Laser Solutions |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue | 105,577 |  | 211,752 |
II-VI Performance Products |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue | 77,568 |  | 150,670 |
II-VI Photonics |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue | 159,694 |  | 294,850 |
Commercial | Direct Ship Parts |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue | 298,663 |  | 576,895 |
Commercial | Services |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue | 4,618 |  | 10,404 |
Commercial | II-VI Laser Solutions | Direct Ship Parts |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue | 100,894 |  | 203,764 |
Commercial | II-VI Laser Solutions | Services |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue | 1,363 |  | 2,253 |
Commercial | II-VI Performance Products | Direct Ship Parts |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue | 39,804 |  | 81,801 |
Commercial | II-VI Performance Products | Services |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue | 1,526 |  | 4,631 |
Commercial | II-VI Photonics | Direct Ship Parts |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue | 157,965 |  | 291,330 |
Commercial | II-VI Photonics | Services |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue | 1,729 |  | 3,520 |
U.S. Government | Direct Ship Parts |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue | 33,507 |  | 60,687 |
U.S. Government | Services |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue | 6,051 |  | 9,286 |
U.S. Government | II-VI Laser Solutions | Direct Ship Parts |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue | 3,320 |  | 5,735 |
U.S. Government | II-VI Performance Products | Direct Ship Parts |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue | 30,187 |  | 54,952 |
U.S. Government | II-VI Performance Products | Services |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue | $ 6,051 |  | $ 9,286 |

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