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Components of Debt (Detail) - USD ($) $ in Thousands | Mar. 31, 2018 | Jun. 30, 2017
--- | --- | ---
Line Of Credit Facility [Line Items] |  |
Total debt, Gross | $ 511,659 |
Total debt | 450,992 | $ 342,022
Current portion of long-term debt | (20,000) | (20,000)
Long-term debt, less current portion | 430,992 | 322,022
0.25% Convertible Senior Note Due 2022 |  |
Line Of Credit Facility [Line Items] |  |
Total debt, Gross | 345,000 |
Convertible senior notes unamortized discount attributable to cash conversion option and debt issuance costs including initial purchaser discount | (59,450) |
Note payable |  |
Line Of Credit Facility [Line Items] |  |
Total debt, Gross | 3,834 |
Integrated Photonics, Inc | Note payable |  |
Line Of Credit Facility [Line Items] |  |
Total debt, Gross | 3,834 | 3,834
Line of credit |  |
Line Of Credit Facility [Line Items] |  |
Total debt, Gross | 90,000 | 252,000
Term Loans |  |
Line Of Credit Facility [Line Items] |  |
Total debt, Gross | 70,000 | 85,000
Yen denominated line of credit |  |
Line Of Credit Facility [Line Items] |  |
Total debt, Gross | 2,825 | 2,679
Credit Facility |  |
Line Of Credit Facility [Line Items] |  |
Credit facility unamortized debt issuance costs | $ (1,217) | $ (1,491)

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