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Equity-Based Compensation (Narrative) (Details) (USD $)
1 Months Ended 12 Months Ended 0 Months Ended 2 Months Ended 12 Months Ended 0 Months Ended 5 Months Ended 12 Months Ended 7 Months Ended 12 Months Ended
Nov. 30, 2010
Dec. 31, 2011
years
May 07, 2010
Senior Management and Certain Key Employees [Member]
Phantom Units [Member]
Dec. 31, 2010
Senior Management and Certain Key Employees [Member]
Phantom Units [Member]
Dec. 31, 2011
Senior Management and Certain Key Employees [Member]
Phantom Units [Member]
Nov. 21, 2010
Former President And Chief Executive Officer [Member]
Phantom Units [Member]
May 25, 2010
Predecessor [Member]
Dec. 31, 2009
Predecessor [Member]
Dec. 31, 2010
Successor [Member]
Dec. 31, 2011
Successor [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Partnership's LTIP units   3,000,000                
Due to change in control, one-time charge due to vesting of outstanding restricted and phantom units under LTIP   $ 9,900,000                
Share-based Compensation             12,070,000 6,008,000 1,827,000 3,610,000
LTIP compensation expense             12,070,000 6,008,000 1,827,000  
Due to change in control, phantom units service condiiton grants, vesting percentage   100.00%                
Service condition grants, Units     247,500 574,700 596,320 33,000        
Due to change in control, phantom units market condiiton grants, vesting percentage 150.00%                  
Partnership expects to recognize compensation expense   $ 20,700,000                
Non-vested phantom units period, in years   4.2