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Intangible Assets, Net | 12 Months Ended
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Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets, Net | Intangible Assets, Net The following table shows changes in the carrying amount of intangible assets, net, by reportable segment.
|  |  |  | Mobile Solutions |  | Power Solutions |  | Total
Balance as of December 31, 2018 |  |  |  | $ | 35,892 |  |  | $ | 95,991 |  |  | $ | 131,883 |
Amortization |  |  |  | (3,479) |  |  | (10,994) |  |  | (14,473) |
Other |  |  |  | 3 |  |  | — |  |  | 3 |
Balance as of December 31, 2019 |  |  |  | 32,416 |  |  | 84,997 |  |  | 117,413 |
Amortization |  |  |  | (3,354) |  |  | (10,994) |  |  | (14,348) |
Balance as of December 31, 2020 |  |  |  | $ | 29,062 |  |  | $ | 74,003 |  |  | $ | 103,065 |
The following table shows the cost and accumulated amortization of our intangible assets as of December 31, 2020 and 2019.
|  |  |  | December 31, 2020 |  | December 31, 2019
|  | Estimated Useful Life in Years |  | Gross Carrying Value as of Acquisition Date |  | Accumulated Amortization |  | Net Carrying Value |  | Gross Carrying Value as of Acquisition Date |  | Accumulated Amortization |  | Net Carrying Value
Customer relationships |  | 12 - 20 |  | $ | 173,746 |  |  | $ | (74,250) |  |  | $ | 99,496 |  |  | $ | 173,746 |  |  | $ | (60,603) |  |  | $ | 113,143 |
Trademark and trade name |  | 8 - 15 |  | 7,527 |  |  | (3,958) |  |  | 3,569 |  |  | 7,527 |  |  | (3,257) |  |  | 4,270 |
Total identified intangible assets |  |  |  | $ | 181,273 |  |  | $ | (78,208) |  |  | $ | 103,065 |  |  | $ | 181,273 |  |  | $ | (63,860) |  |  | $ | 117,413 |
Intangible assets that are fully amortized are removed and no longer represented in the gross carrying value or accumulated amortization. The following table shows estimated future amortization expense for the next five years and thereafter.
Year Ending December 31, |
2021 | $ | 14,347 |
2022 | 14,347 |
2023 | 14,262 |
2024 | 13,919 |
2025 | 13,919 |
Thereafter | 32,271 |
Total | $ | 103,065 |
Intangible assets are reviewed for impairment when changes in circumstances indicate the carrying value of those assets may not be recoverable. As of December 31, 2020 and 2019, there were no indications of impairment.

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- Definition The entire disclosure for all or part of the information related to 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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