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Commitments and Contingencies (Details) - USD ($) $ in Millions | Oct. 13, 2016 | Sep. 30, 2016
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Loss Contingencies [Line Items] |  |
Estimated amount recoverable due to theft of fuel product |  | $ 18.0
Subsequent Event | Hanjin | Collectibility of receivables |  |
Loss Contingencies [Line Items] |  |
Outstanding receivable | $ 18.0 |

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