Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Future Commitments to Pay for Usage of Port Facilities (Details 2)

v3.6.0.2
Commitments and Contingencies - Future Commitments to Pay for Usage of Port Facilities (Details 2) - Port Facility Commitments
$ in Thousands
Dec. 31, 2016
USD ($)
Other Commitments [Line Items]  
2017 $ 54,301
2018 36,584
2019 29,895
2020 30,360
2021 30,838
Thereafter 105,015
Total minimum annual payments $ 286,993