Derivative Financial Instruments (Details)	Jun. 30, 2014 Crude oil bbl	Jun. 30, 2014 Natural Gas [Member] MMBTU	Jun. 30, 2014 Natural Gas Liquids bbl	Jun. 30, 2014 IF El Paso Permian [Member]	Jun. 30, 2014 IF HSC [Member]	Jun. 30, 2014 IF NGPL TXOK [Member]	Jun. 30, 2014 IF NNG Ventura [Member]	Jun. 30, 2014 IF Reliant N/S [Member]	Jun. 30, 2014 IF NGPL MidCont [Member]	Jun. 30, 2014 OPIS Mont. Belvieu LDH Propane [Member]	Jun. 30, 2014 OPIS Mont. Belvieu Non-LDH Natural Gasoline [Member]	Jun. 30, 2014 Collar [Member] Crude oil bbl	Jun. 30, 2014 Collar [Member] Natural Gas [Member] MMBTU	Jun. 30, 2014 Swap Crude oil bbl	Jun. 30, 2014 Swap Natural Gas [Member] MMBTU	Jun. 30, 2014 Swap Natural Gas Liquids bbl	Jun. 30, 2014 Third Quarter Current Year [Member] Collar [Member] Crude oil bbl	Jun. 30, 2014 Third Quarter Current Year [Member] Swap Crude oil bbl	Jun. 30, 2014 Third Quarter Current Year [Member] Swap Natural Gas [Member] MMBTU	Jun. 30, 2014 Third Quarter Current Year [Member] Swap Natural Gas Liquids bbl	Jun. 30, 2014 Fourth Quarter Current Year [Member] Collar [Member] Crude oil bbl	Jun. 30, 2014 Fourth Quarter Current Year [Member] Swap Crude oil bbl	Jun. 30, 2014 Fourth Quarter Current Year [Member] Swap Natural Gas [Member] MMBTU	Jun. 30, 2014 Fourth Quarter Current Year [Member] Swap Natural Gas Liquids bbl	Jun. 30, 2014 2015 [Member] Collar [Member] Crude oil bbl	Jun. 30, 2014 2015 [Member] Collar [Member] Natural Gas [Member] MMBTU	Jun. 30, 2014 2015 [Member] Swap Crude oil bbl	Jun. 30, 2014 2015 [Member] Swap Natural Gas [Member] MMBTU	Jun. 30, 2014 2015 [Member] Swap Natural Gas Liquids MMBTU	Jun. 30, 2014 2016 [Member] Swap Crude oil bbl	Jun. 30, 2014 2016 [Member] Swap Natural Gas [Member] MMBTU	Jun. 30, 2014 2017 [Member] Swap Natural Gas [Member] MMBTU	Jun. 30, 2014 2018 [Member] Swap Natural Gas [Member] MMBTU	Jul. 30, 2014 Subsequent Event [Member] Crude oil bbl	Jul. 30, 2014 Maximum [Member] Subsequent Event [Member] Crude oil	Jul. 30, 2014 Minimum [Member] Subsequent Event [Member] Crude oil
Derivative Financial Instruments
Weighted-Average Contract Price																		96.04	4.02	58.06		94.88	4.02	58.06			89.64	4.04	55.42	85.19	4.17	4.21	4.31
Weighted-Average Floor Price																	85.00				85.00				85.00	3.98
Weighted-Average Ceiling Price																	102.58				102.63				94.25	4.30
Portion of Future Oil and Gas Production Being Hedged	15,100,000		2,600,000									5,262,000		9,838,000		2,602,000	973,000	1,533,000		960,000	923,000	1,353,000		861,000	3,366,000		4,248,000			2,704,000				4,200,000
Index percent of natural gas fixed swaps				3.00%	82.00%	2.00%	3.00%	9.00%	1.00%
Index percent of natural gas collars				4.00%	80.00%		8.00%	8.00%
Index percent of NGL fixed swaps										72.00%	28.00%
Portion of Gas Production Being Hedged		188,600,000											13,002,000		175,600,000				24,541,000				22,014,000			13,002,000		57,943,000	781,000		37,472,000	23,430,000	10,200,000
Derivative, Swap Type, Fixed Price																																			100.58	89.35