Derivatives (Details) (Commodity Derivatives, Swaps, Oil)	3 Months Ended
	Mar. 31, 2014 bbl
Derivatives
Volume (in Bbls or MMBtu)	1,594,000
2nd Quarter 2014
Derivatives
Volume (in Bbls or MMBtu)	560,600
Derivative price per barrel	96.81
3rd Quarter 2014
Derivatives
Volume (in Bbls or MMBtu)	530,200
Derivative price per barrel	96.87
4th Quarter 2014
Derivatives
Volume (in Bbls or MMBtu)	503,200
Derivative price per barrel	96.92