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Goodwill and Intangible Assets | 3 Months Ended
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Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Intangible Assets | Goodwill and Intangible Assets The gross carrying amounts of goodwill at March 31, 2020 and December 31, 2019 are as follows:
(in thousands) | March 31, 2020 |  | December 31, 2019
Metals Segment | $ | 16,203 |  |  | $ | 16,203 |
Specialty Chemicals Segment | 1,355 |  |  | 1,355 |
Goodwill | $ | 17,558 |  |  | $ | 17,558 |
The balance of intangible assets subject to amortization at March 31, 2020 and December 31, 2019 are as follows:
(in thousands) | March 31, 2020 |  | December 31, 2019
Intangible assets, gross | $ | 32,126 |  |  | $ | 32,126 |
Accumulated amortization of intangible assets | (17,221 | ) |  | (16,412 | )
Intangible assets, net | $ | 14,905 |  |  | $ | 15,714 |
Estimated amortization expense related to intangible assets for the next five years are as follows (in thousands):
Remainder of 2020 | $ | 2,429 |
2021 | 3,051 |
2022 | 2,741 |
2023 | 1,200 |
2024 | 1,042 |
2025 | 945 |
Thereafter | 3,497 |

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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