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v3.21.1

Contingencies and Commitments (Details) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2021 USD ($) Trial | May 10, 2019 Vessel | Mar. 22, 2014 TankBarge Vessel
Guaranties [Abstract] |  |  |
Issued guaranties | $ 23,522,000 |  |
Maximum [Member] |  |  |
Guaranties [Abstract] |  |  |
Guarantor obligations, expiration period | 3 years |  |
Performance Bonds [Member] |  |  |
Guaranties [Abstract] |  |  |
Issued guaranties | $ 9,644,000 |  |
Struck by LPG Tanker, the Genesis River [Member] |  |  |
Loss Contingency [Abstract] |  |  |
Number of vessels involved in collision | Vessel |  | 2 |
Number of trials | Trial | 2 |  |
Collision with M/S Summer Wind [Member] |  |  |
Loss Contingency [Abstract] |  |  |
Number of vessels involved in collision | Vessel |  |  | 2
Number of vessels damaged in collision resulting in fuel oil discharge | TankBarge |  |  | 1
Letters of Credit [Member] |  |  |
Guaranties [Abstract] |  |  |
Issued guaranties | $ 13,878,000 |  |

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- Definition Term of the guarantee or each group of financial instruments used to support performance by the company and its subsidiaries 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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