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Related Party Transactions (Details) (NGL Energy [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2012
NGL Energy [Member]
   
Related Party Transaction    
Revenues $ 14,395 $ 41,945
Purchases 6,009 36,573
Reimbursements from NGL Energy for transition services $ 28 $ 526