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Goodwill and Purchased Intangible Assets (Tables) | 12 Months Ended
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Jun. 30, 2017
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, 2017 and 2016:
(In thousands) |  | Wafer Inspection |  | Patterning |  | GSS |  | Others |  | Total
Balance as of June 30, 2015 |  | $ | 332,783 |  | (1) | $ | 2,480 |  | (2) | $ | — |  |  | $ | — |  |  | $ | 335,263 |
Goodwill reallocation |  | (51,671 | ) | (3) | 50,775 |  | (3) | — |  |  | 896 |  | (3) | — |
Foreign currency adjustment |  | (86 | ) |  | — |  |  | — |  |  | — |  |  | (86 | )
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 |
__________________
(1) | The balance as of June 30, 2015, reflects goodwill for the Defect Inspection reporting unit under the old reporting structure which was renamed as Wafer Inspection under a new reporting structure after certain components were allocated out.
(2) | The balance as of June 30, 2015, reflects goodwill for the Metrology reporting unit under the old reporting structure which was renamed as Patterning under a new reporting structure after certain components were allocated in.
(3) | The Company made certain organizational changes and consolidated its product division effective in the first quarter of fiscal 2016. The reorganization resulted in the reallocation of certain goodwill balances as noted above.
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, 2017 |  | As of June 30, 2016
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 |  | $ | 157,259 |  |  | $ | 140,346 |  |  | $ | 16,913 |  |  | $ | 141,659 |  |  | $ | 138,160 |  |  | $ | 3,499 |
Trade name/Trademark | 7 years |  | 20,993 |  |  | 19,902 |  |  | 1,091 |  |  | 19,893 |  |  | 19,743 |  |  | 150 |
Customer relationships | 7-8 years |  | 55,680 |  |  | 54,959 |  |  | 721 |  |  | 54,980 |  |  | 54,298 |  |  | 682 |
Backlog | <1 year |  | 260 |  |  | 22 |  |  | 238 |  |  | — |  |  | — |  |  | — |
Total |  |  | $ | 234,192 |  |  | $ | 215,229 |  |  | $ | 18,963 |  |  | $ | 216,532 |  |  | $ | 212,201 |  |  | $ | 4,331 |
Remaining Estimated Amortization Expense | Based on the intangible assets recorded as of June 30, 2017, 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)
2018 | $ | 4,172 |
2019 | 2,409 |
2020 | 2,409 |
2021 | 2,409 |
2022 | 2,409 |
Thereafter | 5,155 |
Total | $ | 18,963 |

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