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v3.22.0.1

Contingencies and Commitments (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 USD ($) Spill Company Bargeslip | May 10, 2019 Vessel | Mar. 22, 2014 Vessel Tankbarge
Loss Contingencies [Line Items] |  |  |
Loss contingency, settlement charges | $ 15,300,000 |  |
Portland Harbor Superfund Site [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Number of other companies also named as Potentially Responsible Parties ("PRPs") | Company | 250 |  |
Number of spills | Spill | 4 |  |
SBA Shipyard Site [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Number of barge slips | Bargeslip | 3 |  |
Settlement Agreement [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Payments for legal settlements | $ 2,102,000 |  |
Proceeds from legal settlements | $ 20,206,000 |  |
Struck by LPG Tanker, the Genesis River [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Number of vessels involved in collision | Vessel |  | 2 |
Collision with M/S Summer Wind [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Number of vessels involved in collision | Vessel |  |  | 2
Number of vessels damaged in collision resulting in fuel oil discharge | Tankbarge |  |  | 1

X
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