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Goodwill and Purchased Intangible Assets - Schedule of Goodwill (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Jun. 30, 2018 USD ($) reporting_unit | Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($)
Goodwill |  |  |
Number of reporting units | reporting_unit | 4 |  |
Goodwill |  |  |
Goodwill, beginning balance | $ 349,526 | $ 335,177 |
Acquired goodwill | 5,163 | 14,280 |
Foreign currency adjustment | 9 | 69 |
Goodwill, ending balance | 354,698 | 349,526 |
Accumulated impairment loss | 277,600 | 277,600 | $ 277,600
Wafer Inspection |  |  |
Goodwill |  |  |
Goodwill, beginning balance | 281,095 | 281,026 |
Acquired goodwill | 0 | 0 |
Foreign currency adjustment | (90) | 69 |
Goodwill, ending balance | 281,005 | 281,095 |
Patterning |  |  |
Goodwill |  |  |
Goodwill, beginning balance | 53,255 | 53,255 |
Acquired goodwill | 0 | 0 |
Foreign currency adjustment | 0 | 0 |
Goodwill, ending balance | 53,255 | 53,255 |
GSS |  |  |
Goodwill |  |  |
Goodwill, beginning balance | 2,856 | 0 |
Acquired goodwill | 5,163 | 2,856 |
Foreign currency adjustment | 20 | 0 |
Goodwill, ending balance | 8,039 | 2,856 |
Others |  |  |
Goodwill |  |  |
Goodwill, beginning balance | 12,320 | 896 |
Acquired goodwill | 0 | 11,424 |
Foreign currency adjustment | 79 | 0 |
Goodwill, ending balance | $ 12,399 | $ 12,320 |

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