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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES-Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Income Taxes |  |  |  |
Total revenue earned |  | $ 414 |  | $ 1,225
Taxable income | $ (14,513) | (110,557) | $ (30,112) | (164,788)
Income tax expense |  | 96 |  | 350
Vessel Management Services |  |  |  |
Income Taxes |  |  |  |
Total revenue earned | 0 | 414 | 0 | 1,225
Taxable income |  | 228 |  | 791
Income tax expense | $ 0 | 96 | $ 0 | 350
Vessel Management Services | Intersegment Elimination |  |  |  |
Income Taxes |  |  |  |
Total revenue earned |  | $ 0 |  | $ 0

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