Prepaid Expenses and Other Current Assets (Table) (Details) - USD ($) $ in Thousands |
Dec. 31, 2020 |
Dec. 31, 2019 |
|---|---|---|
| PREPAID EXPENSES AND OTHER CURRENT ASSETS [Abstract] | ||
| Prepaid voyage and operating costs | $ 4,616 | $ 5,726 |
| Claims receivable | 4,136 | 3,826 |
| Prepaid other taxes | 2,604 | 1,012 |
| Other | 3,625 | 1,675 |
| Total prepaid expenses and other current assets | $ 14,981 | $ 12,239 |