| Segment Reporting [Table Text Block] |
| For the six-month period ended June 30, 2026 | |
| | | Container vessels segment | | | NML | | | Total | |
| Voyage revenue | | $ | 402,311 | | | $ | - | | | $ | 402,311 | |
| Income from investments in leaseback vessels | | | - | | | | 17,932 | | | | 17,932 | |
| Total revenues | | $ | 402,311 | | | $ | 17,932 | | | $ | 420,243 | |
| | | | | | | | | | | | | |
| Less (1): | | | | | | | | | | | | |
| Voyage expenses | | | (30,859 | ) | | | - | | | | | |
| Voyage expenses-related parties | | | (5,032 | ) | | | - | | | | | |
| Vessels’ operating expenses | | | (84,089 | ) | | | - | | | | | |
| Interest and finance costs | | | (31,157 | ) | | | (5,352 | ) | | | | |
| Other segment items (2) | | | (76,522 | ) | | | - | | | | | |
| Segment profit | | $ | 174,652 | | | $ | 12,580 | | | $ | 187,232 | |
| | | | | | | | | | | | | |
| Reconciliation of segment profit or loss: | | | | | | | | | | | | |
| General and administrative expenses | | | | | | | | | | | (6,842 | ) |
| General and administrative expenses – related parties | | | | | | | | | | | (6,085 | ) |
| Management fees-related parties | | | | | | | | | | | (14,784 | ) |
| Foreign exchange losses | | | | | | | | | | | (976 | ) |
| Interest income | | | | | | | | | | | 6,652 | |
| Other, net | | | | | | | | | | | 278 | |
| Gain on derivative instruments, net | | | | | | | | | | | 326 | |
| Net income from continuing operations | | | | | | | | | | $ | 165,801 | |
| For the six-month period ended June 30, 2025 | |
| | | Container vessels segment | | | NML | | | Total | |
| Voyage revenue | | $ | 428,078 | | | $ | - | | | $ | 428,078 | |
| Income from investments in leaseback vessels | | | - | | | | 12,682 | | | | 12,682 | |
| Total revenues | | $ | 428,078 | | | $ | 12,682 | | | $ | 440,760 | |
| | | | | | | | | | | | | |
| Less (1): | | | | | | | | | | | | |
| Voyage expenses | | | (23,383 | ) | | | - | | | | | |
| Voyage expenses-related parties | | | (5,819 | ) | | | - | | | | | |
| Vessels’ operating expenses | | | (79,171 | ) | | | - | | | | | |
| Interest and finance costs | | | (39,727 | ) | | | (5,483 | ) | | | | |
| Other segment items (2) | | | (73,022 | ) | | | - | | | | | |
| Segment profit | | $ | 206,956 | | | $ | 7,199 | | | $ | 214,155 | |
| | | | | | | | | | | | | |
| Reconciliation of segment profit or loss: | | | | | | | | | | | | |
| General and administrative expenses | | | | | | | | | | | (5,781 | ) |
| General and administrative expenses – related parties | | | | | | | | | | | (4,294 | ) |
| Management fees-related parties | | | | | | | | | | | (14,178 | ) |
| Foreign exchange gains | | | | | | | | | | | 2,571 | |
| Interest income | | | | | | | | | | | 11,779 | |
| Other, net | | | | | | | | | | | 27 | |
| Gain on derivative instruments, net | | | | | | | | | | | 13,767 | |
| Net income from continuing operations | | | | | | | | | | $ | 218,046 | |
| As of June 30, 2026 | |
| | | Container vessels segment | | | NML | | | Total assets | |
| Total Assets | | $ | 3,589,602 | | | $ | 419,108 | | | $ | 4,008,710 | |
| As of December 31, 2025 | |
| | | Container vessels segment | | | NML | | | Total assets | |
| Total Assets | | $ | 3,416,122 | | | $ | 446,540 | | | $ | 3,862,662 | |
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