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Goodwill and Other Intangible Assets (Tables) | 6 Months Ended
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Jun. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Intangible Assets and Goodwill | The following table sets forth the gross carrying value, accumulated amortization and net values of intangible assets and goodwill as of June 30, 2025 and December 31, 2024:
| June 30, 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 |  | $ | (203) |  | $ | 5 |
AEC Technology | 10-15 | 6,531 |  | (3,810) |  | 2,721 |
AEC Intellectual property | 15 | 1,250 |  | (464) |  | 786 |
AEC Customer relationships | 8-15 | 69,561 |  | (49,195) |  | 20,366 |
Heimbach Developed technology | 9 | 9,282 |  | (2,217) |  | 7,065 |
Total Finite-lived intangible assets |  | $ | 86,832 |  | $ | (55,889) |  | $ | 30,943 |
Indefinite-lived intangible assets: |  |  |  |
Heimbach Trade name |  | $ | 6,458 |  | $ | — |  | $ | 6,458 |
MC Goodwill |  | 69,901 |  | — |  | 69,901 |
AEC Goodwill |  | 114,432 |  | — |  | 114,432 |
Total Indefinite-lived intangible assets: |  | $ | 190,791 |  | $ | — |  | $ | 190,791 |
| 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 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense | The changes in intangible assets, net and goodwill from December 31, 2024 to June 30, 2025, were as follows:
(in thousands) | December 31, 2024 | Other Changes | Amortization | Currency Translation | June 30, 2025
Finite-lived intangible assets: |  |  |  |  |
AEC Trademarks and trade names | $ | 11 |  | $ | — |  | $ | (6) |  | $ | — |  | $ | 5 |
AEC Technology | 2,680 |  | — |  | (308) |  | 349 |  | 2,721 |
AEC Intellectual property | 828 |  | — |  | (42) |  | — |  | 786 |
AEC Customer relationships | 21,892 |  | — |  | (1,751) |  | 225 |  | 20,366 |
Heimbach Developed technology | 7,004 |  | (315) |  | (497) |  | 873 |  | 7,065 |
Total Finite-lived intangible assets | $ | 32,415 |  | $ | (315) |  | $ | (2,604) |  | $ | 1,447 |  | $ | 30,943 |
Indefinite-lived intangible assets: |  |  |  |  |
Heimbach Trade name | $ | 5,712 |  | $ | — |  | $ | — |  | $ | 746 |  | $ | 6,458 |
MC Goodwill | 63,988 |  | — |  | — |  | 5,913 |  | 69,901 |
AEC Goodwill | 112,273 |  | — |  | — |  | 2,159 |  | 114,432 |
Total Indefinite-lived assets: | $ | 181,973 |  | $ | — |  | $ | — |  | $ | 8,818 |  | $ | 190,791 |

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