Leases - Future Minimum Commitments for Chartered-In Contracts (Table) (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
Property Subject To Or Available For Operating Lease [Line Items]  
Operating lease liabilities, including current portion $ 47,064
Charter-in contracts  
Property Subject To Or Available For Operating Lease [Line Items]  
December 31, 2020 109,574
December 31, 2021 85,399
December 31, 2022 57,282
December 31, 2023 47,603
December 31, 2024 34,025
December 31, 2025 and thereafter 33,481
Total 367,364
Operating lease liabilities, including current portion 304,568
Discount based on incremental borrowing rate 62,796
Land leases  
Property Subject To Or Available For Operating Lease [Line Items]  
December 31, 2020 556
December 31, 2021 556
December 31, 2022 556
December 31, 2023 556
December 31, 2024 556
December 31, 2025 and thereafter 23,002
Total 25,782
Operating lease liabilities, including current portion 7,660
Discount based on incremental borrowing rate 18,122
Office space  
Property Subject To Or Available For Operating Lease [Line Items]  
December 31, 2020 753
December 31, 2021 356
December 31, 2022 101
December 31, 2023 81
December 31, 2024 0
December 31, 2025 and thereafter 0
Total 1,291
Operating lease liabilities, including current portion 1,204
Discount based on incremental borrowing rate $ 87