Summary of Significant Accounting Policies - Revenues per Category (Table) (Details) - USD ($)
$ in Thousands |
12 Months Ended |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
$ 482,449
|
$ 505,686
|
$ 463,049
|
| Dry Bulk Vessel Operations |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
254,178
|
298,052
|
250,433
|
| Dry Bulk Vessel Operations | Contracts of Affreightment ("COA")/ Voyage Contracts |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
3,727
|
19,121
|
38,273
|
| Dry Bulk Vessel Operations | Time and bareboat chartering |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
250,187
|
278,591
|
199,945
|
| Dry Bulk Vessel Operations | Pooling arrangements |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
0
|
0
|
8,025
|
| Dry Bulk Vessel Operations | Profit-sharing |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
0
|
(52)
|
3,205
|
| Dry Bulk Vessel Operations | Other |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
264
|
392
|
985
|
| Logistics business |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
228,271
|
207,634
|
212,616
|
| Logistics business | Contracts of Affreightment ("COA")/ Voyage Contracts |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
49,488
|
35,623
|
42,455
|
| Logistics business | Time and bareboat chartering |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
76,680
|
72,689
|
84,063
|
| Logistics business | Port terminal operations |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
80,180
|
58,552
|
43,984
|
| Logistics business | Storage fees (dry port) |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
3,452
|
882
|
1,974
|
| Logistics business | Dockage operations |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
4,310
|
3,136
|
4,497
|
| Logistics business | Liquid port terminal operations |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
4,032
|
3,739
|
2,841
|
| Logistics business | Other |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
745
|
505
|
230
|
| Logistics business | Sale of Products |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
9,384
|
32,508
|
$ 32,572
|
| Containers business |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
89,925
|
12,053
|
|
| Containers business | Time and bareboat chartering |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
$ 89,925
|
$ 12,053
|
|