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Acquisitions and Dispositions	12 Months Ended
Acquisitions and Dispositions	Dec. 31, 2013
Business Combinations [Abstract]
Acquisitions and Dispositions	Acquisitions and Dispositions Effective May 1, 2013, we disposed of our Brookeland field in Texas and received net cash proceeds of approximately $6.0 million. This disposition also included the buyer's assumption of our plugging and abandonment liability that was previously included as $11.3 million in "Asset Retirement Obligation" on the accompanying consolidated balance sheets. There were no material acquisitions in 2013, 2012 and 2011.