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Intangible Assets, Goodwill and Other Assets | 12 Months Ended
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Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets, Goodwill and Other Assets | Intangible Assets, Goodwill and Other Assets Intangible Assets The following table reflects the components of intangible assets being amortized at December 31, 2023 and 2022:
|  |  | December 31, 2023 |  | December 31, 2022
| Weighted Amortization Period in Years |  | Gross Carrying Amount |  | Accumulated Amortization |  | Carrying Value |  | Gross Carrying Amount |  | Accumulated Amortization |  | Carrying Value
Offshore pipeline contract intangibles | 19 |  | 158,101 |  |  | 70,036 |  |  | 88,065 |  |  | 158,101 |  |  | 61,715 |  |  | 96,386 |
Other | 10 |  | 70,974 |  |  | 17,502 |  |  | 53,472 |  |  | 45,191 |  |  | 14,257 |  |  | 30,934 |
Total |  |  | $ | 229,075 |  |  | $ | 87,538 |  |  | $ | 141,537 |  |  | $ | 203,292 |  |  | $ | 75,972 |  |  | $ | 127,320 |
The offshore pipeline contract intangibles relate to customer contracts surrounding certain transportation agreements with producers in the Lucius production area in Southeast Keathley Canyon, which support our SEKCO pipeline. We are recording amortization of our intangible assets based on the period over which the asset is expected to contribute to our future cash flows. All of our current intangible assets are being amortized on a straight-line basis. Amortization expense on intangible assets was $11.6 million, $10.3 million and $10.3 million for the years ended December 31, 2023, 2022 and 2021, respectively. The following table reflects our estimated amortization expense for each of the five subsequent fiscal years:
| 2024 |  | 2025 |  | 2026 |  | 2027 |  | 2028
Offshore pipeline contract intangibles | $ | 8,321 |  |  | $ | 8,321 |  |  | $ | 8,321 |  |  | $ | 8,321 |  |  | $ | 8,321 |
Other | 6,504 |  |  | 6,244 |  |  | 5,932 |  |  | 5,485 |  |  | 5,235 |
Total | $ | 14,825 |  |  | $ | 14,565 |  |  | $ | 14,253 |  |  | $ | 13,806 |  |  | $ | 13,556 |
Goodwill The carrying amount of goodwill in our soda and sulfur services segment was $301.9 million at December 31, 2023 and December 31, 2022. We have not recognized any impairment losses related to goodwill for any of the periods presented. Other Assets Other assets consisted of the following:
| December 31,
| 2023 |  | 2022
Deferred marine charges, net (1) | $ | 19,651 |  |  | $ | 20,503 |
Unamortized debt issuance costs on senior secured credit facility | 5,676 |  |  | 2,591 |
Other deferred charges, net | 12,914 |  |  | 9,114 |
Other assets, net of amortization | $ | 38,241 |  |  | $ | 32,208 |
(1) See discussion of deferred charges on marine transportation assets in the Summary of Accounting Policies (Note 2).

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