Intangible Assets/Liabilities Other Than Goodwill - Amortization Expense and Write Offs (Table) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Trade name      
Acquired Finite Lived Intangible Assets [Line Items]      
Amortization Expense and Write Offs $ 2,818 $ 2,811 $ 2,811
Port terminal operating rights      
Acquired Finite Lived Intangible Assets [Line Items]      
Amortization Expense and Write Offs 998 999 950
Customer relationships      
Acquired Finite Lived Intangible Assets [Line Items]      
Amortization Expense and Write Offs 1,775 1,774 1,774
Total      
Acquired Finite Lived Intangible Assets [Line Items]      
Amortization Expense and Write Offs $ 5,591 $ 5,584 $ 5,535