Commitments And Contingencies (Terminated Acquisition Of Marcellus Assets) (Details) (USD $)	3 Months Ended		0 Months Ended	3 Months Ended	0 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Jul. 17, 2011 SM Energy Company	Mar. 31, 2014 SM Energy Company	Apr. 16, 2014 Subsequent Event [Member] SM Energy Litigation [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Payment to acquire acquisitions			$ 110,000,000
Termination date				December 14, 2011
Amount of deposit forfeited					6,000,000
Settlement amount					5,000,000
Note issuance amount					4,500,000
Value of common stock issued	50,000	47,000
Litigation settlement expense	$ 19,034,000