Leases - Total amount of lease payments on an undiscounted basis (Table) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]      
Operating lease liabilities, including current portion   $ 43,516 $ 47,064
Chartered-in vessels in operations [Member]      
Property, Plant and Equipment [Line Items]      
December 31, 2022 $ 68,145    
December 31, 2023 55,103    
December 31, 2024 39,788    
December 31, 2025 19,076    
December 31, 2026 15,142    
December 31, 2027 and thereafter 30,793    
Total 228,047    
Operating lease liabilities, including current portion 189,828    
Discount based on incremental borrowing rate 38,219    
Land Leases [Member]      
Property, Plant and Equipment [Line Items]      
December 31, 2022 556    
December 31, 2023 556    
December 31, 2024 556    
December 31, 2025 556    
December 31, 2026 556    
December 31, 2027 and thereafter 21,889    
Total 24,669    
Operating lease liabilities, including current portion 8,077    
Discount based on incremental borrowing rate 16,592    
Office Space [Member]      
Property, Plant and Equipment [Line Items]      
December 31, 2022 514    
December 31, 2023 414    
December 31, 2024 182    
December 31, 2025 60    
December 31, 2026 53    
December 31, 2027 and thereafter 0    
Total 1,223    
Operating lease liabilities, including current portion 1,081    
Discount based on incremental borrowing rate $ 142