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Omnibus Incentive Compensation Plan - Additional Information (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended 8 Months Ended 12 Months Ended 8 Months Ended 2 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2012
Partnerships Omnibus Incentive Compensation Plan
Jul. 22, 2010
Partnerships Omnibus Incentive Compensation Plan
Apr. 29, 2008
Partnerships Omnibus Incentive Compensation Plan
Aug. 25, 2010
Partnerships Omnibus Incentive Compensation Plan Employees
Dec. 31, 2012
Partnerships Omnibus Incentive Compensation Plan Employees
Aug. 31, 2010
Partnerships Omnibus Incentive Compensation Plan Non Employees
Dec. 31, 2012
Partnerships Omnibus Incentive Compensation Plan Non Employees
Mar. 01, 2010
Crude Carriers Corp. Equity Incentive Plan
Dec. 31, 2012
Crude Carriers Corp. Equity Incentive Plan
Sep. 30, 2011
Acquisition of Crude Carriers Corp. by the Partnership - Crude Equity Incentive Plan
Sep. 30, 2011
Acquisition of Crude Carriers Corp. by the Partnership - Crude Employee Equity Incentive Plan
Sep. 30, 2011
Acquisition of Crude Carriers Corp. by the Partnership - Crude Non Employee Equity Incentive Plan
Sep. 30, 2011
Acquisition of Crude Carriers Corp. by the Partnership - Crude Independent Committee
Dec. 31, 2012
Employee equity compensation
Dec. 31, 2011
Employee equity compensation
Dec. 31, 2010
Employee equity compensation
Aug. 25, 2010
Employee equity compensation
Dec. 31, 2012
Non-Employee equity compensation
Dec. 31, 2011
Non-Employee equity compensation
Dec. 31, 2010
Non-Employee equity compensation
Units / Shares authorized         800,000 500,000         400,000                        
Units granted             448,000   347,200   399,400                        
Number of annual installments               3       3                      
Vesting date of remaining awards                   2013-08-31   2013-08-31                      
Shares exchange ratio                         1.56                    
Unvested shares                           205,000 194,400   338,135 536,666     650,464 650,464  
Number of units converted                           319,800 303,264                
Vested shares                               20,000 198,531       0    
Number of units vested and converted                               31,200              
Value of unvested units accrued distribution       $ 1,823                                      
Share based compensation 3,826 2,455 782                           1,834 1,358 420   1,992 1,097 362
Total unrecognized compensation cost                                 1,216            
Grant date unit price                                       $ 8.08      
Expected period of recognition for unrecognized compensation cost                                 0 years 7 months 25 days            
Total unrecognized compensation cost                                         $ 829    
Grant date unit price                                         $ 6.58    
Expected period of recognition for unrecognized compensation cost                                         0 years 8 months 0 days