Summary of Significant Accounting Policies - Depreciation Periods (Table) (Details)
|
12 Months Ended |
Dec. 31, 2017 |
|---|
| Vessels |
|
| Property Plant And Equipment [Line Items] |
|
| Useful life assets |
25 years
|
| Port terminals | Minimum |
|
| Property Plant And Equipment [Line Items] |
|
| Useful life assets |
5 years
|
| Port terminals | Maximum |
|
| Property Plant And Equipment [Line Items] |
|
| Useful life assets |
40 years
|
| Tanker vessels, barges and pushboats | Minimum |
|
| Property Plant And Equipment [Line Items] |
|
| Useful life assets |
15 years
|
| Tanker vessels, barges and pushboats | Maximum |
|
| Property Plant And Equipment [Line Items] |
|
| Useful life assets |
45 years
|
| Furniture, fixtures and equipment | Minimum |
|
| Property Plant And Equipment [Line Items] |
|
| Useful life assets |
3 years
|
| Furniture, fixtures and equipment | Maximum |
|
| Property Plant And Equipment [Line Items] |
|
| Useful life assets |
10 years
|
| Computer equipment and software |
|
| Property Plant And Equipment [Line Items] |
|
| Useful life assets |
5 years
|
| Leasehold improvements |
|
| Property Plant And Equipment [Line Items] |
|
| Useful life assets |
shorter of lease term or 6 years
|