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Leases, Schedule of Rent Expense (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Rental expense [Abstract] |  |  |
Rental expense | $ 173,988 | $ 144,155 | $ 162,582
Other Buildings and Equipment [Member] |  |  |
Rental expense [Abstract] |  |  |
Rental expense | 23,365 | 15,915 | 11,182
Barges [Member] | Marine Equipment [Member] |  |  |
Rental expense [Abstract] |  |  |
Rental expense | $ 10,234 | 11,550 | 13,791
Towing Vessels [Member] |  |  |
Lease Agreements [Abstract] |  |  |
Percentage of charter agreement for terms of one year or less | 75.00% |  |
Towing Vessels [Member] | Marine Equipment [Member] |  |  |
Rental expense [Abstract] |  |  |
Rental expense | $ 140,389 | $ 116,690 | $ 137,609
Minimum [Member] | Barges [Member] |  |  |
Lease Agreements [Abstract] |  |  |
Lease agreements expiring terms | 1 year |  |
Minimum [Member] | Towing Vessels [Member] |  |  |
Lease Agreements [Abstract] |  |  |
Lease agreements expiring terms | 30 days |  |
Maximum [Member] | Barges [Member] |  |  |
Lease Agreements [Abstract] |  |  |
Lease agreements expiring terms | 12 years |  |
Maximum [Member] | Towing Vessels [Member] |  |  |
Lease Agreements [Abstract] |  |  |
Lease agreements expiring terms | 10 years |  |

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- Definition Refers to lease agreements expiring terms, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Percentage of charter agreement for terms of one year or less related to towing vessels. + References No definition available. + Details
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717 + Details
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- Details
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