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Goodwill and Other Intangible Assets (Tables) | 6 Months Ended
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Dec. 31, 2018
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) | Industrial |  | Widia |  | Infrastructure |  | Total
Gross goodwill | $ | 411,458 |  |  | $ | 41,186 |  |  | $ | 633,211 |  |  | $ | 1,085,855 |
Accumulated impairment losses | (137,204 | ) |  | (13,638 | ) |  | (633,211 | ) |  | (784,053 | )
Balance as of June 30, 2018 | $ | 274,254 |  |  | $ | 27,548 |  |  | $ | — |  |  | $ | 301,802 |
Activity for the six months ended December 31, 2018: |  |  |  |  |  |  |
Change in gross goodwill due to translation | (1,604 | ) |  | (195 | ) |  | — |  |  | (1,799 | )
Gross goodwill | 409,854 |  |  | 40,991 |  |  | 633,211 |  |  | 1,084,056 |
Accumulated impairment losses | (137,204 | ) |  | (13,638 | ) |  | (633,211 | ) |  | (784,053 | )
Balance as of December 31, 2018 | $ | 272,650 |  |  | $ | 27,353 |  |  | $ | — |  |  | $ | 300,003 |
The components of intangible assets | The components of our other intangible assets were as follows:
| Estimated Useful Life (in years) |  | December 31, 2018 | June 30, 2018
(in thousands) |  | Gross Carrying Amount |  | Accumulated Amortization |  |  | Gross Carrying Amount |  | Accumulated Amortization
Contract-based | 3 to 15 |  | $ | 7,055 |  |  | $ | (7,043 | ) |  |  | $ | 7,061 |  |  | $ | (7,036 | )
Technology-based and other | 4 to 20 |  | 46,333 |  |  | (31,314 | ) |  |  | 46,666 |  |  | (30,923 | )
Customer-related | 10 to 21 |  | 205,189 |  |  | (89,701 | ) |  |  | 206,162 |  |  | (85,301 | )
Unpatented technology | 10 to 30 |  | 31,697 |  |  | (14,259 | ) |  |  | 31,854 |  |  | (13,096 | )
Trademarks | 5 to 20 |  | 12,377 |  |  | (9,047 | ) |  |  | 12,450 |  |  | (8,978 | )
Trademarks | Indefinite |  | 17,199 |  |  | — |  |  |  | 17,609 |  |  | — |
Total |  |  | $ | 319,850 |  |  | $ | (151,364 | ) |  |  | $ | 321,802 |  |  | $ | (145,334 | )

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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=108376223&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=108376223&loc=d3e13854-109267 + Details
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