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Long-term Debt - Information Per Loan (Details) | 3 Months Ended | 5 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 02, 2015 USD ($) | Mar. 31, 2015 USD ($) | May. 27, 2015 USD ($) | May. 21, 2015 USD ($) | Jun. 30, 2015 USD ($) | Mar. 30, 2015 USD ($) | Mar. 13, 2015 USD ($) | Dec. 31, 2014 USD ($) | Jun. 30, 2014 USD ($) | Dec. 31, 2013 USD ($)
Long-term debt [Line Items] |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  | $ 285,203,000 |  |  | $ 86,000,000 | $ 39,420,000 | $ 44,298,000
Restricted cash |  |  |  |  | 2,769,000 |  |  | 3,352,000 |  |
DVB $31,000 Deep Blue Facility |  |  |  |  |  |  |  |  |  |
Long-term debt [Line Items] |  |  |  |  |  |  |  |  |  |
Amount drawn down |  |  | $ 28,680,000 |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  | $ 31,000,000 |  |  |  |  |  |
Number of installments |  |  |  | 24 |  |  |  |  |  |
Frequency of payments |  |  |  | quarterly |  |  |  |  |  |
Repayment installment |  |  |  | $ 476,500 |  |  |  |  |  |
Balloon installment |  |  |  | $ 17,245,000 |  |  |  |  |  |
BNP committed term sheet |  |  |  |  |  |  |  |  |  |
Long-term debt [Line Items] |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  | $ 39,500,000 |  |  |
DNB-SEB-CEXIM $227,500 Facility |  |  |  |  |  |  |  |  |  |
Long-term debt [Line Items] |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  | $ 227,500,000 |  |  |  |  |  |  |  |
Number of installments |  | 24 |  |  |  |  |  |  |  |
Frequency of payments |  | quarterly |  |  |  |  |  |  |  |
Repayment installment |  | $ 508,400 |  |  |  |  |  |  |  |
Balloon installment |  | $ 20,198,000 |  |  |  |  |  |  |  |
Number of loan tranches |  | 7 |  |  |  |  |  |  |  |
Restructuring Agreement - Commerzbank $120,000 and $26,000 facilities |  |  |  |  |  |  |  |  |  |
Long-term debt [Line Items] |  |  |  |  |  |  |  |  |  |
Prepayment amount |  |  |  |  |  | $ 3,000,000 |  |  |  |
Tranche A | DNB-SEB-CEXIM $227,500 Facility |  |  |  |  |  |  |  |  |  |
Long-term debt [Line Items] |  |  |  |  |  |  |  |  |  |
Amount drawn down | $ 32,400,000 |  |  |  |  |  |  |  |  |
Company's Minimum Liquid Funds |  |  |  |  |  |  |  |  |  |
Long-term debt [Line Items] |  |  |  |  |  |  |  |  |  |
Liquid funds |  |  |  |  | 200,000,000 |  |  |  |  |
Minimum Liquid Funds per Vessel |  |  |  |  |  |  |  |  |  |
Long-term debt [Line Items] |  |  |  |  |  |  |  |  |  |
Liquid funds |  |  |  |  | 2,000,000 |  |  |  |  |
Not legally restricted |  |  |  |  |  |  |  |  |  |
Long-term debt [Line Items] |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  | 35,200,000 |  |  | 35,400,000 |  |
Legally restricted |  |  |  |  |  |  |  |  |  |
Long-term debt [Line Items] |  |  |  |  |  |  |  |  |  |
Restricted cash |  |  |  |  | $ 13,789,000 |  |  | $ 13,972,000 |  |

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