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Other Current Assets, Properties and Equipment, Other Assets, Accrued Expenses, Other Current Liabilities and Other Liabilities - Additional Information (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2019 USD ($) Vessel | Sep. 30, 2019 USD ($) Vessel | Sep. 30, 2018 USD ($)
Property Plant And Equipment [Line Items] |  |  |
Number of vessels |  | 220 |
Proceeds from sales of assets | $ |  | $ 25,092 | $ 16,499
Scenario, Forecast |  |  |
Property Plant And Equipment [Line Items] |  |  |
Number of vessels sold | 2 |  |
Proceeds from sales of assets | $ | $ 3,600 |  |
Americas | Scenario, Forecast |  |  |
Property Plant And Equipment [Line Items] |  |  |
Number of vessels sold | 1 |  |
West Africa | Scenario, Forecast |  |  |
Property Plant And Equipment [Line Items] |  |  |
Number of vessels sold | 1 |  |

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- Definition Number of Vessels Sold + References No definition available. + Details
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- Definition The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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