CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
CONSOLIDATED STATEMENTS OF OPERATIONS
Transactions with affiliates - Transportation, compression and processing fees	$ 5,189	$ 739	$ 10,847	$ 742
Transactions with affiliates - Cost of natural gas and natural gas liquids	47,971	7,757	105,729	7,476
Transactions with affiliates - Transportation	$ 2,576	$ 1,958	$ 7,079	$ 4,769