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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES-Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Income Taxes |  |  |  |
Total revenue earned |  | $ 1,016 |  | $ 2,240
Taxable income | $ (31,182) | (27,097) | $ (61,295) | (191,886)
Income tax expense |  | 417 |  | 766
Vessel Management Services |  |  |  |
Income Taxes |  |  |  |
Total revenue earned | 0 | 1,016 | 0 | 2,240
Taxable income |  | 829 |  | 1,619
Income tax expense | $ 0 | 417 | $ 0 | 766
Vessel Management Services | Intersegment Elimination |  |  |  |
Income Taxes |  |  |  |
Total revenue earned |  | $ 0 |  | $ 0

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