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Revenues (Tables) | 12 Months Ended
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Dec. 31, 2018
Revenues [Abstract] |
Revenues by Major Source | The following table sets forth the Company’s revenues by major source for the years ended December 31, 2018, 2017 and 2016 (in thousands):
|  | 2018 |  |  | 2017 |  |  | 2016 |
Marine transportation segment: |  |  |  |  |  |  |  |  |
Inland transportation |  | $ | 1,119,820 |  |  | $ | 923,916 |  |  | $ | 951,097 |
Coastal transportation |  |  | 363,323 |  |  |  | 400,190 |  |  |  | 520,796 |
|  | $ | 1,483,143 |  |  | $ | 1,324,106 |  |  | $ | 1,471,893 |
Distribution and services segment: |  |  |  |  |  |  |  |  |
Oil and gas |  | $ | 1,010,410 |  |  | $ | 614,128 |  |  | $ | 115,012 |
Commercial and industrial |  |  | 477,144 |  |  |  | 276,184 |  |  |  | 183,768 |
|  | $ | 1,487,554 |  |  | $ | 890,312 |  |  | $ | 298,780 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
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