Prepaid Expenses and Other Current Assets (Table) (Details) - USD ($) $ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| PREPAID EXPENSES AND OTHER CURRENT ASSETS [Abstract] | ||
| Prepaid voyage and operating costs | $ 8,352 | $ 8,700 |
| Claims receivable | 9,822 | 11,078 |
| Prepaid other taxes | 4,279 | 3,664 |
| Advances for working capital purposes | 4,486 | 0 |
| Other | 1,957 | 700 |
| Total prepaid expenses and other current assets | $ 28,896 | $ 24,142 |