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Transactions With Related Parties - Additional Information - Interchart (Details) $ / shares in Units, $ in Thousands | 6 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jul. 11, 2014 shares | Oct. 01, 2014 USD ($) | Oct. 01, 2014 EUR (€) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) shares | Jul. 31, 2015 | Apr. 01, 2014 $ / shares
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Shares to acquire business | shares | 54,104,200 |  |  |  |  |  |
Exchange rate EUR/USD |  |  |  | 1.09 |  | 1.34 |
Interchart Shipping Inc. |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Acquisition date |  |  |  | Feb. 25, 2014 |  |  |
Percentage of total outstanding common shares |  |  |  |  | 33.00% |  |
Payment to acquire business | $ |  |  |  |  | $ 200 |  |
Shares to acquire business | shares |  |  |  |  | 22,598 |  |
Fair value per share transferred | $ / shares |  |  |  |  |  |  | $ 14.51
Services Agreement | Interchart Shipping Inc. |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Annual lump sum fee |  | $ 545 | € 500,000 |  |  |  |
Expiration date of agreement |  |  |  | Oct. 01, 2014 |  |  |
New Services Agreement | Interchart Shipping Inc. |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Monthly lump sum fee | $ |  |  |  | $ 275 |  |  |
Expiration date of agreement |  |  |  | Dec. 31, 2016 |  |  |

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