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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Changes in Intangible Assets and Goodwill | The changes in intangible assets and goodwill from December 31, 2018 to December 31, 2020, were as follows:
(in thousands, except for years) |  | Amortization life in years |  | Balance at December 31, 2019 |  | Other Changes |  | Amortization |  | Currency Translation |  | Balance at December 31, 2020
Amortized intangible assets: |  |  |  |  |  |  |  |  |  |  |  |
AEC Trademarks and trade names |  | 6-15 |  | $ | 73 |  |  | $ | — |  |  | $ | (16) |  |  | $ | — |  |  | $ | 57 |
AEC Technology |  | 10-15 |  | 5,804 |  |  | — |  |  | (670) |  |  | 610 |  |  | 5,744 |
AEC Intellectual property |  | 15 |  | 1,243 |  |  | — |  |  | (83) |  |  | — |  |  | 1,160 |
AEC Customer contracts |  | 6 |  | 6,544 |  |  | — |  |  | (2,912) |  |  | — |  |  | 3,632 |
AEC Customer relationships |  | 8-15 |  | 39,147 |  |  | 329 |  |  | (3,513) |  |  | 297 |  |  | 36,260 |
AEC Other intangibles |  | 5 |  | 81 |  |  | — |  |  | (65) |  |  | — |  |  | 16 |
Total amortized intangible assets |  |  |  | $ | 52,892 |  |  | $ | 329 |  |  | $ | (7,259) |  |  | $ | 907 |  |  | $ | 46,869 |
Unamortized intangible assets: |  |  |  |  |  |  |  |  |  |  |  |
MC Goodwill |  |  |  | $ | 67,672 |  |  | $ | — |  |  | $ | — |  |  | $ | 4,618 |  |  | $ | 72,290 |
AEC Goodwill |  |  |  | 113,262 |  |  | 335 |  |  | — |  |  | 1,666 |  |  | 115,263 |
Total unamortized intangible assets |  |  |  | $ | 180,934 |  |  | $ | 335 |  |  | $ | — |  |  | $ | 6,284 |  |  | $ | 187,553 |
(in thousands, except for years) |  | Amortization life in years |  | Balance at December 31, 2018 |  | Acquisition |  | Amortization |  | Currency Translation |  | Balance at December 31, 2019
Amortized intangible assets: |  |  |  |  |  |  |  |  |  |  |  |
AEC Trademarks and trade names |  | 6-15 |  | $ | 11 |  |  | $ | 68 |  |  | $ | (6) |  |  | $ | — |  |  | $ | 73 |
AEC Technology |  | 10-15 |  | 56 |  |  | 5,821 |  |  | (73) |  |  | — |  |  | 5,804 |
AEC Intellectual property |  | 15 |  | — |  |  | 1,250 |  |  | (7) |  |  | — |  |  | 1,243 |
AEC Customer contracts |  | 6 |  | 9,456 |  |  | — |  |  | (2,912) |  |  | — |  |  | 6,544 |
AEC Customer relationships |  | 8-15 |  | 39,538 |  |  | 2,834 |  |  | (3,247) |  |  | 22 |  |  | 39,147 |
AEC Other intangibles |  | 5 |  | 145 |  |  | — |  |  | (64) |  |  | — |  |  | 81 |
Total amortized intangible assets |  |  |  | $ | 49,206 |  |  | $ | 9,973 |  |  | $ | (6,309) |  |  | $ | 22 |  |  | $ | 52,892 |
Unamortized intangible assets: |  |  |  |  |  |  |  |  |  |  |  |
MC Goodwill |  |  |  | $ | 68,652 |  |  | $ | — |  |  | $ | — |  |  | $ | (980) |  |  | $ | 67,672 |
AEC Goodwill |  |  |  | 95,730 |  |  | 17,343 |  |  | — |  |  | 189 |  |  | 113,262 |
Total unamortized intangible assets |  |  |  | $ | 164,382 |  |  | $ | 17,343 |  |  | $ | — |  |  | $ | (791) |  |  | $ | 180,934 |
Schedule of Estimated Amortization Expense | Estimated amortization expense of intangibles for the years ending December 31, 2021 through 2025, is as follows:
Year |  | Annual amortization (in thousands)
2021 |  | $ | 7,200 |
2022 |  | 5,000 |
2023 |  | 4,200 |
2024 |  | 4,200 |
2025 |  | 4,200 |

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