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Commitments and Contigencies (Details) $ in Thousands | 3 Months Ended | 10 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 31, 2013 USD ($) | Nov. 05, 2014 | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Loss Contingencies [Line Items] |  |  |  |
Coverage for pollution |  |  | $ 1,000,000 |
Variable portion of payment to SWS owner |  |  | 6-month LIBOR of 1.83707%, and 3-month LIBOR of 1.69428% as of December 31, 2017, whichever is applicable |
Due to related parties |  |  | $ 229 | $ 356
Star Polaris | Arbitration proceedings |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Name of defendant |  |  | Hanjin HHIC-Phil Inc. |
Off hire days | 142 |  |  |
Revenue loss due to off hire | $ 2,343 |  |  |
Heron Convertible Loan |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Conversion ratio |  | 0.5 |  |
Due to related parties |  |  | $ 0 | $ 0

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