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, 2019
USD ($)
Other Commitments [Line Items]  
2020 $ 79,418
2021 67,671
2022 68,049
2023 70,100
2024 75,112
Thereafter 1,726,575
Total minimum annual payments $ 2,086,925