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DEBT - $98M Credit Facility (Details) $ in Thousands |  |  | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Nov. 10, 2015 USD ($) | Nov. 04, 2015 USD ($) subsidiary item | Jun. 30, 2018 USD ($) | Jun. 30, 2017 USD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2017 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Nov. 15, 2016 USD ($)
Line of Credit Facility |  |  |  |  |  |  |  |  |
Restricted cash, current |  |  |  | $ 8,335 |  | $ 8,335 | $ 7,234 | $ 8,242 |
Restricted cash, non-current |  |  | $ 315 | 25,507 | $ 315 | 25,507 | 23,233 | $ 27,426 |
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 |  |
Drawdowns during the period | $ 98,271 |  |  |  |  |  |  |  |
Repayment of line of credit facility |  |  | 91,397 | $ 0 | 93,939 | $ 0 |  |  |
Long-term debt |  |  | 0 |  | 0 |  | 92,569 |  |
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 |  |  | 0 |  | 0 |  | 7,234 |  |
Restricted cash, non-current |  |  | $ 0 |  | $ 0 |  | $ 11,738 |  |
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 number of collateral vessels, in which the loan is to be prepaid from earnings received from operations after deduction of costs, fees, expenses, interest, and fixed principal repayments under the facility; operating expenses relating to the vessels; and the Borrowers' pro rata share of general and administrative expenses based on the number of vessels they own. + 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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