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Related Party Transactions 1 (Details) (Successor [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended
Jun. 30, 2012
Successor [Member]
 
Related Party Transaction [Line Items]  
Operating revenue - ETE $ 6,794
Cost of natural gas and other energy 5,614
Operating, maintenance and general 4,138
Interest expense 1,780
Equity in Earnings $ 673