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Goodwill and Purchased Intangible Assets (Tables) | 12 Months Ended
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Jun. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill Rollforward | The following table presents goodwill balances and the movements by reporting unit during the fiscal years ended June 30, 2018 and 2017:
(In thousands) |  | Wafer Inspection |  | Patterning |  | GSS |  | Others |  | Total
Balance as of June 30, 2016 |  | $ | 281,026 |  |  | $ | 53,255 |  |  | $ | — |  |  | $ | 896 |  |  | $ | 335,177 |
Acquired goodwill |  | — |  |  | — |  |  | 2,856 |  |  | 11,424 |  |  | 14,280 |
Foreign currency adjustment |  | 69 |  |  | — |  |  | — |  |  | — |  |  | 69 |
Balance as of June 30, 2017 |  | 281,095 |  |  | 53,255 |  |  | 2,856 |  |  | 12,320 |  |  | 349,526 |
Acquired goodwill |  | — |  |  | — |  |  | 5,163 |  |  | — |  |  | 5,163 |
Foreign currency and other adjustments |  | (90 | ) |  | — |  |  | 20 |  |  | 79 |  |  | 9 |
Balance as of June 30, 2018 |  | $ | 281,005 |  |  | $ | 53,255 |  |  | $ | 8,039 |  |  | $ | 12,399 |  |  | $ | 354,698 |
Components of Purchased Intangible Assets | The components of purchased intangible assets as of the dates indicated below were as follows:
(In thousands) |  |  | As of June 30, 2018 |  | As of June 30, 2017
Category | Range of Useful Lives |  | Gross Carrying Amount |  | Accumulated Amortization and Impairment |  | Net Amount |  | Gross Carrying Amount |  | Accumulated Amortization and Impairment |  | Net Amount
Existing technology | 4-7 years |  | $ | 160,859 |  |  | $ | 144,202 |  |  | $ | 16,657 |  |  | $ | 157,259 |  |  | $ | 140,346 |  |  | $ | 16,913 |
Trade name/Trademark | 7 years |  | 20,993 |  |  | 20,060 |  |  | 933 |  |  | 20,993 |  |  | 19,902 |  |  | 1,091 |
Customer relationships | 7-8 years |  | 56,680 |  |  | 55,136 |  |  | 1,544 |  |  | 55,680 |  |  | 54,959 |  |  | 721 |
Backlog | <1 year |  | 660 |  |  | 461 |  |  | 199 |  |  | 260 |  |  | 22 |  |  | 238 |
Total |  |  | $ | 239,192 |  |  | $ | 219,859 |  |  | $ | 19,333 |  |  | $ | 234,192 |  |  | $ | 215,229 |  |  | $ | 18,963 |
Remaining Estimated Amortization Expense | Based on the intangible assets recorded as of June 30, 2018, and assuming no subsequent additions to, or impairment of, the underlying assets, the remaining estimated annual amortization expense is expected to be as follows:
Fiscal year ending June 30: | Amortization (In thousands)
2019 | $ | 3,400 |
2020 | 3,201 |
2021 | 3,201 |
2022 | 3,201 |
2023 | 3,151 |
Thereafter | 3,179 |
Total | $ | 19,333 |

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