Accrued And Other Liabilities (Schedule Of Accrued And Other Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 MMcf		Dec. 31, 2012 MMcf
Accrued And Other Liabilities [Line Items]
Accrued lease operating expenses	$ 20,297	[1]	$ 11,173	[1]
Accrued capital spending	16,316		6,109
Distributions payable	14,155		3,500
Accrued production and other taxes	6,270		7,401
Senior notes accrued interest	11,563		11,563
Gas imbalance asset (liability)	(6,214)	[2]	(5,351)	[2]
Other	4,230		1,187
Total accrued and other liabilities	79,045		46,284
Underproduced [Member]
Accrued And Other Liabilities [Line Items]
Gas imbalance asset (liability)	4,100		1,200
Gas imbalance, volume	1.5		1.5
Gross natural gas position, per MCF	4.62		3.46
Overproduced [member]
Accrued And Other Liabilities [Line Items]
Gas imbalance, volume	2.1		2.1
Gross natural gas position, per MCF	4.31		3.41
Preferred Affiliates [Member]
Accrued And Other Liabilities [Line Items]
Distributions payable	$ 3,500

[1] For the year ended December 31, 2013 and 2012, balance includes preferred distributions payable to affiliates of $3.5 million.

[2] We account for our natural gas imbalances under the sales method. We had overproduced liabilities of $6.2 million and $5.4 million included in accrued liabilities on our consolidated balance sheets as of December 31, 2013 and December 31, 2012, respectively, for overproduced positions which were beyond ultimate recoverability of remaining natural gas reserves. As of December 31, 2013, our gross underproduced natural gas position was approximately $4.1 million (1.5 MMcf) and our gross overproduced natural gas position was approximately $6.2 million (2.1 MMcf). These gross positions were valued at $4.62 per Mcf for underproduced natural gas positions and $4.31 per Mcf for overproduced natural gas positions without regard to remaining natural gas reserves. As of December 31, 2012, our gross underproduced natural gas position was approximately $1.2 million (1.5 MMcf) and our gross overproduced natural gas position was approximately $5.4 million (2.1 MMcf). These gross positions were valued at $3.46 per Mcf for underproduced natural gas positions and $3.41 per Mcf for overproduced natural gas positions without regard to remaining natural gas reserves.