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Acquisitions and Dispositions	6 Months Ended
Acquisitions and Dispositions	Jun. 30, 2014
Business Combinations [Abstract]
Acquisitions and Dispositions	(6) Acquisitions and Dispositions Effective May 1, 2013, we disposed of our Brookeland field in Texas and received net cash proceeds of $5.8 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 condensed consolidated balance sheets. There were no material acquisitions or dispositions for the six months ended June 30, 2014.