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GOODWILL AND INTANGIBLE ASSETS | 12 Months Ended
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Dec. 31, 2020
Intangible Assets, Net (Excluding Goodwill) [Abstract] |
Intangible Assets | INTANGIBLE ASSETS The components of intangible assets for each of the years ended December 31, 2020 and 2019, were as follows (amounts in thousands):
| Weighted- Average Useful Lives (in Years) |  | 2020 |  | 2019
Amortizable intangible assets: |  |  |  |  |
Customer relationships | 0 |  | $ | — |  |  | $ | 12,629 |
Patents, trademarks, and other | 10.43 |  | 10,181 |  |  | 11,598 |
Total at cost |  |  | 10,181 |  |  | 24,227 |
Less accumulated amortization |  |  | (8,206) |  |  | (14,461) |
|  |  | $ | 1,975 |  |  | $ | 9,766 |
During the fourth quarter of 2020, the Company recorded an impairment charge of $6.0 million related to the customer relationships intangible asset in Australia as a result of attrition of several customers since the business was initially acquired in 2012. Amortization related to intangible assets for the years 2020, 2019, and 2018 totaled $2.3 million, $2.2 million, and $2.3 million, respectively. The estimated aggregate amortization expense at December 31, 2020, for each of the years (or other periods) set forth below was as follows (amounts in thousands):
2021 | $ | 472 |
2022 | 144 |
2023 | 144 |
2024 | 139 |
2025 | 123 |
Thereafter | 953 |
| $ | 1,975 |

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- Definition The entire disclosure for goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2144439 + Details
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