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Commitments and Contigencies (Details) | 3 Months Ended | 6 Months Ended | 9 Months Ended | 10 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2013 USD ($) | Jun. 28, 2013 USD ($) | Oct. 03, 2014 USD ($) | Nov. 05, 2014 | Dec. 31, 2016 USD ($) | Dec. 31, 2016 EUR (€) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Jul. 31, 2014
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Coverage for pollution |  |  |  |  | $ 1,000,000,000 |  |  |  |
Exchange rate EUR/USD |  |  |  |  | 1.05 |  |  |  | 1.34
Exinguishment of liability related to amount of fuel and lubricants remaining on board |  |  |  |  | $ 0 |  | $ 0 | $ 1,361,000 |
Variable portion of payment to SWS owner |  |  |  |  | 6-month LIBOR of 1.34572% | 6-month LIBOR of 1.34572% |  |  |
Due to related parties |  |  |  |  | $ 356,000 |  | 422,000 |  |
Star Cosmo | Spanish port authorities environmental fines |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Settlement agreement, amount |  |  |  |  | $ 273,000 | € 260,000 |  |  |
Star Polaris | Arbitration proceedings |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Name of defendant |  |  |  |  | Hanjin HHIC-Phil Inc. | Hanjin HHIC-Phil Inc. |  |  |
Off hire days | 142 |  |  |  |  |  |  |  |
Revenue loss due to off hire | $ 2,343,000 |  |  |  |  |  |  |  |
Star Borealis |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Gross daily charter rate |  | $ 24,750 |  |  |  |  |  |  |
Proceeds from sale of settled claim |  |  | $ 8,016,000 |  |  |  |  |  |
Gain on sale of claim |  |  |  |  |  |  |  | 9,377,000 |
Exinguishment of liability related to amount of fuel and lubricants remaining on board |  |  |  |  |  |  |  | $ 1,361,000 |
Heron Convertible Loan |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Conversion ratio |  |  |  | 0.5 |  |  |  |  |
Oceanbulk Sellers |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Due to related parties |  |  |  |  | $ 0 |  | $ 50,000 |  |

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