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DEBT - $98M Credit Facility (Details) $ in Thousands |  |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Nov. 10, 2015 USD ($) | Nov. 04, 2015 USD ($) subsidiary item | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Nov. 15, 2016 USD ($) | Jun. 29, 2016 USD ($) | Jun. 28, 2016
Line of Credit Facility |  |  |  |  |  |  |  |
Restricted cash, current |  |  | $ 7,234 | $ 8,242 | $ 19,500 |  |  |
Restricted cash, non-current |  |  | 23,233 | 27,426 | 315 |  |  |
Repayment of the outstanding debt |  |  |  |  |  |  |  |
Total debt |  |  | 519,083 | 523,577 |  |  |  |
$98 Million Credit Facility Commitment Letter |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |
Collateral security maintenance test (as a percent) |  |  |  |  |  |  | 120.00% | 140.00%
$98 Million Credit Facility Commitment Letter | Minimum |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |
Minimum cash requirement through the end of the waiver period |  |  |  |  |  |  | $ 25,000 |
Line of Credit Facility | $98 Million Credit Facility |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |
Number of wholly owned subsidiaries | subsidiary |  | 13 |  |  |  |  |  |
Maximum borrowing capacity |  | $ 98,000 | 98,000 | 98,000 | 98,000 | $ 98,000 |  |
Drawdowns during the period | $ 98,271 |  |  |  | 98,271 |  |  |
Remaining borrowing capacity |  |  | 0 |  |  |  |  |
Repayment of line of credit facility |  |  | 1,332 | 3,000 | $ 0 |  |  |
Long-term debt |  |  | 92,569 | 93,403 |  |  |  |
Fixed amortization payment for the first two years |  | $ 0 |  |  |  |  |  |
Period without fixed amortization schedule |  | 2 years |  |  |  |  |  |
Amount of periodic payment |  | $ 2,500 |  |  |  |  |  |
Maximum collateral required for prepayment of loan (as a percent) |  | 182.00% |  |  |  |  |  |
Number of collateral vessels | item |  | 13 |  |  |  |  |  |
Minimum cash required to be maintained by each collateralized vessel |  |  |  |  |  | $ 750 |  |
Collateral security maintenance test (as a percent) |  |  |  |  |  | 140.00% |  |
Restricted cash, current |  |  | 7,234 | 8,242 |  |  |  |
Restricted cash, non-current |  |  | 11,738 | 15,931 |  |  |  |
Repayment of the outstanding debt |  |  |  |  |  |  |  |
2018 |  |  | 10,000 |  |  |  |  |
2019 |  |  | 10,000 |  |  |  |  |
2020 |  |  | 73,939 |  |  |  |  |
Total debt |  |  | $ 93,939 | $ 95,271 |  |  |  |
Line of Credit Facility | $98 Million Credit Facility | LIBOR |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |
Reference rate |  | three-month LIBOR |  |  |  |  |  |
Applicable margin over reference rate for interest payable |  | 6.125% |  |  |  |  |  |
Line of Credit Facility | $98 Million Credit Facility | Minimum |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |
Loan repayment requirement to have the ability to pay dividends after December 31, 2018 |  |  |  |  |  | $ 25,000 |  |

X
- Definition Represents the minimum cash required per vessel mortgaged under this facility. + References No definition available. + Details
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- Definition Represents the aggregate fair value of the mortgaged vessels to be maintained as a percentage of aggregate outstanding principal amount as per the terms of the credit facilities' covenants. + References No definition available. + Details
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- Definition The maximum percentage of the value of the collateral as compared to the loan amount outstanding which requires prepayment of the line of credit using excess cash flows. + References No definition available. + Details
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- Definition Represents the line of credit period without amortization, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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