Derivative Instruments (Details) (USD $)	9 Months Ended
	Sep. 30, 2013 MMBTU
Three-Way Collar | October - December 2013 | Natural Gas
Oil and gas contracts
Daily Volumes	10,000
Weighted Average Price	$ 3.00
Three-Way Collar | Minimum [Member] | October - December 2013 | Natural Gas
Oil and gas contracts
Weighted Average Price	$ 2.00
Three-Way Collar | Maximum [Member] | October - December 2013 | Natural Gas
Oil and gas contracts
Weighted Average Price	$ 4.09
Collar | October - December 2013 | Natural Gas
Oil and gas contracts
Daily Volumes	5,000
Collar | Minimum [Member] | October - December 2013 | Natural Gas
Oil and gas contracts
Weighted Average Price	$ 4.00
Collar | Maximum [Member] | October - December 2013 | Natural Gas
Oil and gas contracts
Weighted Average Price	$ 4.75
Swap | October - December 2013 | Natural Gas
Oil and gas contracts
Daily Volumes	30,000
Weighted Average Price	$ 3.78
Swap | October - December 2013 | Crude Oil
Oil and gas contracts
Daily Volumes	1,350
Weighted Average Price	$ 102.45	[1]
Swap | October - December 2013 | Natural Gas Liquids
Oil and gas contracts
Daily Volumes	150
Weighted Average Price	$ 92.42
Swap | January - June 2014 | Crude Oil
Oil and gas contracts
Daily Volumes	200
Weighted Average Price	$ 101.30	[1]
Swap | 2014 | Natural Gas
Oil and gas contracts
Daily Volumes	20,000
Weighted Average Price	$ 4.04
Swap | 2014 | Crude Oil
Oil and gas contracts
Daily Volumes	750
Weighted Average Price	$ 97.47	[1]
LLS Index | Swap | October - December 2013 | Crude Oil
Oil and gas contracts
Daily Volumes	500
LLS Index | Swap | January - June 2014 | Crude Oil
Oil and gas contracts
Daily Volumes	200
LLS Index | Swap | 2014 | Crude Oil
Oil and gas contracts
Daily Volumes	400

[1] Bbls per day tied to LLS index.