| GOODWILL AND OTHER INTANGIBLE ASSETS |
GOODWILL AND OTHER INTANGIBLE ASSETS 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 | $ | 441,891 | | | $ | 633,211 | | | $ | 1,075,102 | | | Accumulated impairment losses | (177,661) | | | (633,211) | | | (810,872) | | Balance as of June 30, 2022 | $ | 264,230 | | | $ | — | | | $ | 264,230 | | | | | | | | Activity for the six months ended December 31, 2022: | | | | | | | Change in gross goodwill due to translation | 2,403 | | | — | | | 2,403 | | | | | | | | | Gross goodwill | 444,294 | | | 633,211 | | | 1,077,505 | | | Accumulated impairment losses | (177,661) | | | (633,211) | | | (810,872) | | Balance as of December 31, 2022 | $ | 266,633 | | | $ | — | | | $ | 266,633 | |
The components of our other intangible assets were as follows: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Estimated
Useful Life
(in years) | | December 31, 2022 | June 30, 2022 | | (in thousands) | | Gross Carrying
Amount | | Accumulated
Amortization | | | Gross Carrying
Amount | | Accumulated
Amortization | | | | | | | | | | | | | Technology-based and other | 4 to 20 | | $ | 31,792 | | | $ | (23,324) | | | | $ | 31,592 | | | $ | (22,734) | | | Customer-related | 10 to 21 | | 180,105 | | | (108,815) | | | | 180,263 | | | (104,698) | | | Unpatented technology | 10 to 30 | | 31,687 | | | (24,098) | | | | 31,807 | | | (22,950) | | | Trademarks | 5 to 20 | | 12,418 | | | (10,883) | | | | 12,403 | | | (10,317) | | | Trademarks | Indefinite | | 10,614 | | | — | | | | 10,359 | | | — | | | Total | | | $ | 266,616 | | | $ | (167,120) | | | | $ | 266,424 | | | $ | (160,699) | |
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