| Goodwill and Other Intangible Assets |
Goodwill and Other Intangible Assets The following table sets forth the gross carrying value, accumulated amortization and net values of intangible assets and goodwill as of March 31, 2025 and December 31, 2024: | | | | | | | | | | | | | | | | March 31, 2025 | | (in thousands) | Amortization
life in years | Gross carrying amount | Accumulated amortization and other | Net carrying amount | | | | | | | Finite-lived assets: | | | | | | AEC Trademarks and trade names | 6-15 | $ | 208 | | $ | (200) | | $ | 8 | | | AEC Technology | 10-15 | 6,048 | | (3,398) | | 2,650 | | | AEC Intellectual property | 15 | 1,250 | | (443) | | 807 | | | AEC Customer relationships | 8-15 | 69,298 | | (48,203) | | 21,095 | | | Heimbach Developed technology | 9 | 8,884 | | (1,832) | | 7,052 | | | Total Finite-lived intangible assets | | $ | 85,688 | | $ | (54,076) | | $ | 31,612 | | | | | | | | Indefinite-lived intangible assets: | | | | | | Heimbach Trade name | | $ | 5,951 | | $ | — | | $ | 5,951 | | | MC Goodwill | | 65,873 | | — | | 65,873 | | | AEC Goodwill | | 112,964 | | — | | 112,964 | | | Total Indefinite-lived intangible assets: | | $ | 184,788 | | $ | — | | $ | 184,788 | |
| | | | | | | | | | | | | | | | December 31, 2024 | | (in thousands) | Amortization
life in years | Gross carrying amount | Accumulated amortization and other | Net carrying amount | | | | | | | Finite-lived assets: | | | | | | AEC Trademarks and trade names | 6-15 | $ | 208 | | $ | (197) | | $ | 11 | | | AEC Technology | 10-15 | 5,820 | | (3,140) | | 2,680 | | | AEC Intellectual property | 15 | 1,250 | | (422) | | 828 | | | AEC Customer relationships | 8-15 | 69,175 | | (47,283) | | 21,892 | | | Heimbach Developed technology | 9 | 8,547 | | (1,543) | | 7,004 | | | Total Finite-lived assets | | $ | 85,000 | | $ | (52,585) | | $ | 32,415 | | | | | | | | Indefinite-lived intangible assets: | | | | | | Heimbach Trade name | | $ | 5,712 | | $ | — | | $ | 5,712 | | | MC Goodwill | | 63,988 | | — | | 63,988 | | | AEC Goodwill | | 112,273 | | — | | 112,273 | | | Total Indefinite-lived intangible assets: | | $ | 181,973 | | $ | — | | $ | 181,973 | |
The changes in intangible assets, net and goodwill from December 31, 2024 to March 31, 2025, were as follows: | | | | | | | | | | | | | | | | | | | (in thousands) | December 31, 2024 | Other
Changes | Amortization | Currency
Translation | March 31, 2025 | | Finite-lived intangible assets: | | | | | | | AEC Trademarks and trade names | $ | 11 | | $ | — | | $ | (3) | | $ | — | | $ | 8 | | | AEC Technology | 2,680 | | — | | (142) | | 112 | | 2,650 | | | AEC Intellectual property | 828 | | — | | (21) | | — | | 807 | | | AEC Customer relationships | 21,892 | | — | | (870) | | 73 | | 21,095 | | | Heimbach Developed technology | 7,004 | | — | | (233) | | 281 | | 7,052 | | | Total Finite-lived intangible assets | $ | 32,415 | | $ | — | | $ | (1,269) | | $ | 466 | | $ | 31,612 | | | | | | | | | Indefinite-lived intangible assets: | | | | | | | Heimbach Trade name | $ | 5,712 | | $ | — | | $ | — | | $ | 239 | | $ | 5,951 | | | MC Goodwill | 63,988 | | — | | — | | 1,885 | | 65,873 | | | AEC Goodwill | 112,273 | | — | | — | | 691 | | 112,964 | | | Total Indefinite-lived assets: | $ | 181,973 | | $ | — | | $ | — | | $ | 2,815 | | $ | 184,788 | |
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