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Goodwill and Other Intangible Assets (Tables) | 6 Months Ended
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Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
The carrying amount of goodwill | A summary of the carrying amount of goodwill attributable to each segment, as well as the changes in such carrying amounts, is as follows:
(in thousands) | Metal Cutting |  | Infrastructure |  | Total
Gross goodwill | $ | 448,241 |  |  | $ | 633,211 |  |  | $ | 1,081,452 |
Accumulated impairment losses | (177,661) |  |  | (633,211) |  |  | (810,872) |
Balance as of June 30, 2020 | $ | 270,580 |  |  | $ | — |  |  | $ | 270,580 |
Activity for the six months ended December 31, 2020: |  |  |  |  |
Change in gross goodwill due to translation | 10,867 |  |  | — |  |  | 10,867 |
Gross goodwill | 459,108 |  |  | 633,211 |  |  | 1,092,319 |
Accumulated impairment losses | (177,661) |  |  | (633,211) |  |  | (810,872) |
Balance as of December 31, 2020 | $ | 281,447 |  |  | $ | — |  |  | $ | 281,447 |
The components of intangible assets | The components of our other intangible assets were as follows:
| Estimated Useful Life (in years) |  | December 31, 2020 | June 30, 2020
(in thousands) |  | Gross Carrying Amount |  | Accumulated Amortization |  |  | Gross Carrying Amount |  | Accumulated Amortization
Technology-based and other | 4 to 20 |  | $ | 33,881 |  |  | $ | (24,235) |  |  |  | $ | 32,713 |  |  | $ | (22,612) |
Customer-related | 10 to 21 |  | 183,624 |  |  | (94,174) |  |  |  | 181,408 |  |  | (88,112) |
Unpatented technology | 10 to 30 |  | 31,906 |  |  | (19,305) |  |  |  | 31,586 |  |  | (17,890) |
Trademarks | 5 to 20 |  | 13,332 |  |  | (9,583) |  |  |  | 13,087 |  |  | (8,772) |
Trademarks | Indefinite |  | 12,215 |  |  | — |  |  |  | 11,160 |  |  | — |
Total |  |  | $ | 274,958 |  |  | $ | (147,297) |  |  |  | $ | 269,954 |  |  | $ | (137,386) |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13854-109267 + Details
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