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Goodwill and Purchased Intangible Assets (Tables) | 6 Months Ended
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Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill Balances | The following table presents goodwill balances and the movements by reporting unit during the six months ended December 31, 2017:
(In thousands) |  | Wafer Inspection |  | Patterning |  | GSS |  | Others |  | Total
Balance as of June 30, 2017 |  | $ | 281,095 |  |  | $ | 53,255 |  |  | $ | 2,856 |  |  | $ | 12,320 |  |  | $ | 349,526 |
Foreign currency and other adjustments |  | 13 |  |  | — |  |  | 97 |  |  | 387 |  |  | 497 |
Balance as of December 31, 2017 |  | $ | 281,108 |  |  | $ | 53,255 |  |  | $ | 2,953 |  |  | $ | 12,707 |  |  | $ | 350,023 |
Components of Purchased Intangible Assets | The components of purchased intangible assets as of the dates indicated below were as follows:
(In thousands) |  |  | As of December 31, 2017 |  | 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 |  | $ | 157,259 |  |  | $ | 142,459 |  |  | $ | 14,800 |  |  | $ | 157,259 |  |  | $ | 140,346 |  |  | $ | 16,913 |
Trade name/Trademark | 7 years |  | 20,993 |  |  | 19,981 |  |  | 1,012 |  |  | 20,993 |  |  | 19,902 |  |  | 1,091 |
Customer relationships | 7-8 years |  | 55,680 |  |  | 55,036 |  |  | 644 |  |  | 55,680 |  |  | 54,959 |  |  | 721 |
Backlog | <1 year |  | 260 |  |  | 153 |  |  | 107 |  |  | 260 |  |  | 22 |  |  | 238 |
Total |  |  | $ | 234,192 |  |  | $ | 217,629 |  |  | $ | 16,563 |  |  | $ | 234,192 |  |  | $ | 215,229 |  |  | $ | 18,963 |
Remaining Estimated Amortization Expense | Based on the intangible assets recorded as of December 31, 2017, and assuming no subsequent additions to, or impairment of, the underlying assets, the remaining estimated amortization expense is expected to be as follows:
Fiscal year ending June 30: | Amortization (In thousands)
2018 (remaining 6 months) | $ | 1,851 |
2019 | 2,486 |
2020 | 2,486 |
2021 | 2,486 |
2022 | 2,486 |
Thereafter | 4,768 |
Total | $ | 16,563 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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