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v3.20.1

Revenues (Details) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Disaggregation of Revenue [Abstract] |  |
Revenues by major source | $ 643,926,000 | $ 744,621,000
Revenue recognized | 32,386,000 | 50,921,000
Marine Transportation [Member] |  |
Disaggregation of Revenue [Abstract] |  |
Revenues by major source | 403,257,000 | 368,121,000
Marine Transportation [Member] | Inland Transportation [Member] |  |
Disaggregation of Revenue [Abstract] |  |
Revenues by major source | 318,565,000 | 283,085,000
Marine Transportation [Member] | Coastal Transportation [Member] |  |
Disaggregation of Revenue [Abstract] |  |
Revenues by major source | 84,692,000 | 85,036,000
Distribution and Services [Member] |  |
Disaggregation of Revenue [Abstract] |  |
Revenues by major source | 240,669,000 | 376,500,000
Distribution and Services [Member] | Oil and Gas [Member] |  |
Disaggregation of Revenue [Abstract] |  |
Revenues by major source | 78,678,000 | 223,101,000
Distribution and Services [Member] | Commercial and Industrial [Member] |  |
Disaggregation of Revenue [Abstract] |  |
Revenues by major source | $ 161,991,000 | $ 153,399,000

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- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045 + Details
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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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