Quarterly report pursuant to Section 13 or 15(d)

Other Long-Term Financial Liabilities (Details)

v3.20.2
Other Long-Term Financial Liabilities (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2020
USD ($)
equipment
Jun. 30, 2019
USD ($)
Other Long-Term Financial Liabilities [Line Items]    
Proceeds from other long-term financial liabilities | $ $ 33,662 $ 0
U.S.-flag - Harbor Tugs    
Other Long-Term Financial Liabilities [Line Items]    
Equipment Subject to Failed Sale Leaseback, Number of Units | equipment 3  
U.S.-flag - Harbor Tugs | Minimum    
Other Long-Term Financial Liabilities [Line Items]    
Failed Sale Leaseback Transaction, Lease Terms 72  
U.S.-flag - Harbor Tugs | Maximum    
Other Long-Term Financial Liabilities [Line Items]    
Failed Sale Leaseback Transaction, Lease Terms 84