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Significant Accounting Policies - Critical accounting judgments and key sources of estimation uncertainty (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
USD ($)
item
Dec. 31, 2021
USD ($)
Classification of the Partnership interests:    
Percentage of available cash required to be distributed 100.00%  
Number of days after quarter end to distribute cash to partner 45 days  
Impairment of vessels    
Tangible fixed assets $ 1,677,771 $ 1,888,583
Annual escalation factor for operating expenses (as a percent) 1.00%  
Discount rate used to estimate future cash flows 8.40% 7.50%
Vessels    
Impairment of vessels    
Tangible fixed assets $ 1,672,159 $ 1,884,494
Steam vessels    
Impairment of vessels    
Discount rate used to estimate future cash flows 8.40% 7.50%
Number of vessels for which value in use is lower than carrying amount | item 2  
Number of vessels | item 3  
Impairment loss $ 4,444