Organization And Operations (Schedule Of Net Assets Contributed By The Fund - October2011) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 28, 2012		Oct. 03, 2011
Organization And Operations [Abstract]
Oil and gas properties, net			$ 441,207
Gas processing equipment net			251
Derivative instrument asset, net	(2,948)		64,671
Deferred tax assets			205
Long-term debt			(227,000)
Asset retirement obligation	(34,261)		(26,294)
Natural gas imbalances			(3,709)
Net assets acquired	(45,578)		249,331
Purchase price adjustments	5,270	[1]	2,715
Net assets contributed by Predecessor's	$ (40,308)	[2]	$ 252,046	[3]

[1] Represents a reclamation deposit in escrow as security for abandonment and redemption obligations.

[2] The net assets contributed to us include the historical book value of the Predecessor as prescribed by our accounting policy for transactions between entities under common control in Note 2 - Summary of Significant Accounting Policies and a $5.3 million purchase price adjustment related to novated derivatives unwound by the Partnership.

[3] The net assets contributed to us include the historical book value of the Predecessor as prescribed by our accounting policy for transactions between entities under common control in Note 2 - Summary of Significant Accounting Policies and a $2.7 million purchase price adjustment for natural gas imbalances in accordance with the purchase and sale agreement.