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Intangible Assets | 9 Months Ended
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Sep. 30, 2019
Intangible Assets, Net (Excluding Goodwill) [Abstract] |
Intangible Assets | Intangible Assets The following table summarizes the components of our intangible assets at the dates indicated:
| September 30, 2019 |  | December 31, 2018
| Gross Carrying Amount |  | Accumulated Amortization |  | Carrying Value |  | Gross Carrying Amount |  | Accumulated Amortization |  | Carrying Value
Intangibles associated with lease (1) | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 13,260 |  |  | $ | 5,407 |  |  | $ | 7,853 |
Marine contract intangibles | 27,800 |  |  | 21,674 |  |  | 6,126 |  |  | 27,800 |  |  | 17,593 |  |  | 10,207 |
Offshore pipeline contract intangibles | 158,101 |  |  | 34,671 |  |  | 123,430 |  |  | 158,101 |  |  | 28,431 |  |  | 129,670 |
Other | 33,555 |  |  | 20,396 |  |  | 13,159 |  |  | 31,747 |  |  | 16,875 |  |  | 14,872 |
Total | $ | 219,456 |  |  | $ | 76,741 |  |  | $ | 142,715 |  |  | $ | 230,908 |  |  | $ | 68,306 |  |  | $ | 162,602 |
(1) Intangible assets associated with a lease in our onshore facilities & transportation segment are now classified as part of our Right or Use Assets, net as part of our adoption of ASC 842 as of January 1, 2019 (Note 4). Our amortization of intangible assets for the periods presented was as follows:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Amortization of intangible assets | $ | 4,928 |  |  | $ | 5,475 |  |  | $ | 14,029 |  |  | $ | 16,369 |
We estimate that our amortization expense for the next five years will be as follows:
Remainder of | 2019 | $ | 4,333 |
| 2020 | $ | 15,463 |
| 2021 | $ | 10,417 |
| 2022 | $ | 10,258 |
| 2023 | $ | 9,975 |

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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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- References No definition available. + Details
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