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Goodwill and Purchased Intangible Assets - Schedule of Goodwill (Details) $ in Thousands | 3 Months Ended |
--- | --- | ---
Sep. 30, 2017 USD ($) reporting_unit | Jun. 30, 2017 USD ($)
Goodwill |  |
Number of reporting units | reporting_unit | 4 |
Goodwill |  |
Balance as of June 30, 2017 | $ 349,526 |
Foreign currency and other adjustments | 152 |
Balance as of September 30, 2017 | 349,678 |
Accumulated impairment loss | 277,600 | $ 277,600
Wafer Inspection |  |
Goodwill |  |
Balance as of June 30, 2017 | 281,095 |
Foreign currency and other adjustments | (19) |
Balance as of September 30, 2017 | 281,076 |
Patterning |  |
Goodwill |  |
Balance as of June 30, 2017 | 53,255 |
Foreign currency and other adjustments | 0 |
Balance as of September 30, 2017 | 53,255 |
GSS |  |
Goodwill |  |
Balance as of June 30, 2017 | 2,856 |
Foreign currency and other adjustments | 34 |
Balance as of September 30, 2017 | 2,890 |
Others |  |
Goodwill |  |
Balance as of June 30, 2017 | 12,320 |
Foreign currency and other adjustments | 137 |
Balance as of September 30, 2017 | $ 12,457 |

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