Summary of Significant Accounting Policies - Revenues per Category (Table) (Details) - USD ($)
$ in Thousands |
12 Months Ended |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
$ 416,718
|
$ 482,449
|
$ 505,686
|
| Sale of products revenue |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
17,272
|
9,384
|
32,508
|
| COA/Voyage revenue |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
60,665
|
53,215
|
54,744
|
| Time chartering revenue |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
253,241
|
326,867
|
363,333
|
| Profit sharing revenue |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
0
|
0
|
(52)
|
| Port terminal revenue |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
73,112
|
80,180
|
58,552
|
| Storage fees (dry port) revenue |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
3,364
|
3,452
|
882
|
| Dockage revenue |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
3,948
|
4,310
|
3,136
|
| Liquid port terminal revenue |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
4,606
|
4,032
|
3,739
|
| Other |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
510
|
1,009
|
897
|
| Dry Bulk Vessel Operations |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
200,793
|
254,178
|
298,052
|
| Dry Bulk Vessel Operations | COA/Voyage revenue |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
6,660
|
3,727
|
19,121
|
| Dry Bulk Vessel Operations | Time chartering revenue |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
194,005
|
250,187
|
278,591
|
| Dry Bulk Vessel Operations | Profit sharing revenue |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
0
|
0
|
(52)
|
| Dry Bulk Vessel Operations | Other |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
128
|
264
|
392
|
| Logistics Business |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
215,925
|
228,271
|
207,634
|
| Logistics Business | Sale of products revenue |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
17,272
|
9,384
|
32,508
|
| Logistics Business | COA/Voyage revenue |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
54,005
|
49,488
|
35,623
|
| Logistics Business | Time chartering revenue |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
59,236
|
76,680
|
72,689
|
| Logistics Business | Port terminal revenue |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
73,112
|
80,180
|
58,552
|
| Logistics Business | Storage fees (dry port) revenue |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
3,364
|
3,452
|
882
|
| Logistics Business | Dockage revenue |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
3,948
|
4,310
|
3,136
|
| Logistics Business | Liquid port terminal revenue |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
4,606
|
4,032
|
3,739
|
| Logistics Business | Other |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
382
|
745
|
505
|
| Containers Business |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
0
|
0
|
12,053
|
| Containers Business | Time chartering revenue |
|
|
|
| Segment Reporting, Revenue Reconciling Item [Line Items] |
|
|
|
| Revenue |
$ 0
|
$ 0
|
$ 12,053
|