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Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction (Details) $ in Thousands | 1 Months Ended | 2 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |
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Jun. 30, 2025 USD ($) item | Jan. 31, 2025 item | Dec. 31, 2024 item | Jul. 31, 2024 item | Jun. 30, 2024 item | Mar. 31, 2024 USD ($) | Jun. 30, 2023 item | Apr. 30, 2023 item | Mar. 31, 2024 item | Mar. 31, 2025 item | Sep. 30, 2024 item | Jun. 30, 2024 USD ($) item | Jun. 30, 2025 USD ($) item | Jun. 30, 2024 USD ($) | Dec. 31, 2028 item | Dec. 31, 2027 item | Dec. 31, 2026 item | Dec. 31, 2024 USD ($) item t | Dec. 31, 2023 USD ($) | Feb. 03, 2025 USD ($)
Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels delivered |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6 |  |
Net gain on disposal of vessel | $ |  |  |  |  |  |  |  |  |  |  |  | $ 7,094 |  | $ 7,094 |  |  |  |  |  |
Interest expense capitalized | $ |  |  |  |  |  |  |  |  |  |  |  |  | $ 9,300 | 11,400 |  |  |  |  |  |
Amortization of assumed time charters | $ |  |  |  |  |  |  |  |  |  |  |  |  | 0 | $ 4,534 |  |  |  |  |  |
Manager |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Supervision fee per new building vessel payable | $ | $ 850 |  |  |  |  |  |  |  |  |  |  |  | 850 |  |  |  |  |  |  | $ 850
Supervision fees for vessels capitalized | $ |  |  |  |  |  |  |  |  |  |  |  |  | 600 |  |  |  |  | $ 3,000 |  |
Stride |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Insurance proceeds | $ |  |  |  |  |  | $ 11,900 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net gain on disposal of vessel | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,300 |  |
Vessesls under Construction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense capitalized | $ |  |  |  |  |  |  |  |  |  |  |  |  | $ 9,300 |  |  |  |  | $ 21,500 |  |
6,014 TEU |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
TEU of vessels contracted for construction | 6,014 | 6,014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels contracted for construction | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Two 6,014 TEU |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
TEU of vessels contracted for construction |  |  |  |  |  |  |  | 6,014 |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels delivered |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |
Number of vessels contracted for construction |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |
Two 8,258 TEU |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
TEU of vessels contracted for construction |  |  |  |  |  |  | 8,258 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels contracted for construction |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |
Four 8,258 TEU |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
TEU of vessels contracted for construction |  |  |  |  |  |  |  |  | 8,258 |  |  |  |  |  |  |  |  |  |  |
Number of vessels contracted for construction |  |  |  |  |  |  |  |  | 4 |  |  |  |  |  |  |  |  |  |  |
Four 8,258 TEU | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels expected to be delivered |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 | 1 |  |  |
One 8,258 and five 9200 twenty-feet equivalent | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels expected to be delivered |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 | 4 |  |  |  |
One 8,258 TEU |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
TEU of vessels contracted for construction |  |  |  |  | 8,258 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels contracted for construction |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Five 9,200 TEU Vessels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
TEU of vessels contracted for construction |  |  |  | 9,200 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels contracted for construction |  |  |  | 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
8,010 TEU Container Vessels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Container Vessels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4 |  |
TEU of container vessels acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,010 |  |
7,165 TEU Container Vessels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Container Vessels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |
TEU of container vessels acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,165 |  |
Two 9,200 TEU Vessels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
TEU of vessels contracted for construction |  |  | 9,200 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels contracted for construction |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
TEU container vessels | Vessesls under Construction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels under construction | 16 |  |  |  |  |  |  |  |  |  |  |  | 16 |  |  |  |  |  |  |
Aggregate purchase price | $ | $ 1,516,600 |  |  |  |  |  |  |  |  |  |  |  | $ 1,516,600 |  |  |  |  |  |  |
Payments for purchase price of construction assets | $ |  |  |  |  |  |  |  |  |  |  |  |  | $ 62,200 |  |  |  |  | $ 180,400 | $ 40,000 |
Capesize Bulk Carriers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels delivered |  |  |  |  |  |  |  |  |  |  | 1 | 2 |  |  |  |  |  |  |  |
Number of carriers agreed to acquire |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 |  |
DWT of carriers agreed to acquire | t |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 529,704 |  |
Aggregate amount of purchase price | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 79,800 |  |

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