Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Future Commitments to Pay for Usage of Port Facilities (Details)

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Commitments and Contingencies - Future Commitments to Pay for Usage of Port Facilities (Details) - Port Facility Commitments
$ in Thousands
Dec. 31, 2020
USD ($)
Other Commitments [Line Items]  
2021 $ 71,691
2022 71,296
2023 71,460
2024 75,822
2025 70,132
Thereafter 1,707,376
Total minimum annual payments $ 2,067,777