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Commitments and Contingencies (Details) - USD ($)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2013
Property, Plant and Equipment [Line Items]        
Reported lease income of the partnership $ 130,500,000      
Charter Hire Commission payable to the Management company 1.25%      
Commission payable over the minimum contractual charter revenues $ 13,784,000      
Daily management fee $ 3,000 $ 2,900 $ 2,800 $ 2,500
Inflation rate adjustment to management fees 3.00%      
Management services agreement initial termination date December 31, 2020      
From January 1, 2020 to December 31, 2020        
Property, Plant and Equipment [Line Items]        
Management fees $ 6,752,000      
Two time charters        
Property, Plant and Equipment [Line Items]        
Nature of lease payments Escalating      
Two time charters        
Property, Plant and Equipment [Line Items]        
Nature of lease payments Fixed and variable      
One time charter        
Property, Plant and Equipment [Line Items]        
Term of Time charter contract 3 years      
Renewal term of Time charter contract Two consecutive 12 months periods      
Two time charters        
Property, Plant and Equipment [Line Items]        
Renewal term of Time charter contract Three consecutive periods of five years