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Partners' Capital - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended 24 Months Ended
Mar. 27, 2019
Sep. 30, 2016
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2013
Common units issued     18,178,100 18,178,100    
Common units outstanding     18,178,100 18,178,100    
General Partner Units Outstanding     348,570 348,570    
Redemption price     $ 116,850 $ 0 $ 0  
Dividends paid     28,771 52,600 51,630  
Difference between carrying amount of Class B Convertible Preferred Units and their redemption price     $ 9,119 $ 0 $ 0  
Reverse unit split, description one for seven reverse unit split          
CMTC            
Interest of CGP in the partnership     1.88%      
Class B Convertible Preferred Unit Subscription Agreement            
Class B convertible preferred unit issued           24,655,554
Conversion price of the Preferred units           $ 9
Preferred units conversion rate           1
May 23, June 6, 2012 and 2013 Class B Convertible Preferred Units Subscription Agreements Conversion Terms     Commencing on May 23, 2015, in the event the 30-day volume-weighted average trading price (“VWAP”) and the daily VWAP of the Common Units on the National Securities Exchange on which the Common Units are listed or admitted to trading exceeds 130% of the then applicable Conversion Price for at least 20 Trading Days out of the 30 consecutive Trading Day period used to calculate the 30-day VWAP (the “Partnership Mandatory Conversion Event”) the Partnership acting pursuant to direction and approval of the Conflicts Committee (following consultation with the full board of directors), should have the right to convert the Class B Convertible Preferred Units then outstanding in whole or in part into Common Units at the then-applicable Conversion Ratio. The holders of the outstanding Class B Convertible Preferred Units as of an applicable record date should be entitled to receive, in cash, when, as and if authorized by the Partnership’s board of directors or any duly authorized committee, out of legally available funds for such purpose, (a) first, the minimum quarterly Class B Convertible Preferred Unit Distribution Rate on each Class B Convertible Preferred Unit and (b) second, any cumulative Class B Convertible Preferred Unit Arrearage then outstanding, prior to any other distributions made in respect of any other Partnership Interests pursuant to the Subscription Agreements. The minimum quarterly Class B Convertible Preferred Unit Distribution Rate should be payable quarterly which is generally expected to be February 10, May 10, August 10 and November 10, or, if any such date is not a business day, the next succeeding business day.      
Class B Convertible Preferred Units | Transaction Agreement with DSS Holdings L.P.            
Redemption percentage 100.00%          
Redemption price $ 116,850          
Dividends paid 2,652          
Difference between carrying amount of Class B Convertible Preferred Units and their redemption price $ 9,119          
The "ATM Offering" | UBS Securities LLC ("UBS")            
Equity offering         736,008  
Net proceeds from equity offering         $ 17,815  
Maximum proceeds from the issuance of new common units   $ 50,000        
Offering expenses         $ 176  
The "ATM Offering" | Maximum | UBS Securities LLC ("UBS")            
Commission percentage     2.00%      
Right waived | Minimum | CMTC            
Distribution target amount per unit     $ 1.6975      
Right waived | Maximum | CMTC            
Distribution target amount per unit     $ 1.75      
Before Reverse Split            
Common units issued 127,246,692          
Common units outstanding 127,246,692          
General Partner Units Issued 2,439,989          
General Partner Units Outstanding 2,439,989          
Adjusted for the March 2019 reverse split            
Common units issued     18,178,100      
Common units outstanding     18,178,100      
General Partner Units Issued     348,570      
General Partner Units Outstanding     348,570