Commodity Derivative Contracts (Details)	Jun. 30, 2014
Swap [Member] | Crude Oil Contracts [Member] | Year 2014 [Member] | Q3 [Member] | NYMEX [Member]
Derivative [Line Items]
Volume per Day	58,000
Weighted average swap price	92.52
Swap [Member] | Crude Oil Contracts [Member] | Year 2014 [Member] | Q3 [Member] | NYMEX [Member] | Minimum [Member]
Derivative [Line Items]
Derivative, Swap Type, Fixed Price	90.00
Swap [Member] | Crude Oil Contracts [Member] | Year 2014 [Member] | Q3 [Member] | NYMEX [Member] | Maximum [Member]
Derivative [Line Items]
Derivative, Swap Type, Fixed Price	93.50
Swap [Member] | Crude Oil Contracts [Member] | Year 2014 [Member] | Q4 [Member] | NYMEX [Member]
Derivative [Line Items]
Volume per Day	58,000
Weighted average swap price	92.52
Swap [Member] | Crude Oil Contracts [Member] | Year 2014 [Member] | Q4 [Member] | NYMEX [Member] | Minimum [Member]
Derivative [Line Items]
Derivative, Swap Type, Fixed Price	90.00
Swap [Member] | Crude Oil Contracts [Member] | Year 2014 [Member] | Q4 [Member] | NYMEX [Member] | Maximum [Member]
Derivative [Line Items]
Derivative, Swap Type, Fixed Price	93.50
Swap [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q1 [Member] | NYMEX [Member]
Derivative [Line Items]
Volume per Day	14,000
Weighted average swap price	90.06
Weighted average sold put price	65.21
Swap [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q1 [Member] | NYMEX [Member] | Minimum [Member]
Derivative [Line Items]
Derivative, Swap Type, Fixed Price	90.00
Swap [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q1 [Member] | NYMEX [Member] | Maximum [Member]
Derivative [Line Items]
Derivative, Swap Type, Fixed Price	90.30
Swap [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q1 [Member] | LLS [Member]
Derivative [Line Items]
Volume per Day	16,000
Weighted average swap price	93.63
Weighted average sold put price	68.00
Swap [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q1 [Member] | LLS [Member] | Minimum [Member]
Derivative [Line Items]
Derivative, Swap Type, Fixed Price	93.20
Swap [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q1 [Member] | LLS [Member] | Maximum [Member]
Derivative [Line Items]
Derivative, Swap Type, Fixed Price	94.00
Swap [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q2 [Member] | NYMEX [Member]
Derivative [Line Items]
Volume per Day	8,000
Weighted average swap price	90.00
Weighted average sold put price	65.75
Swap [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q2 [Member] | NYMEX [Member] | Minimum [Member]
Derivative [Line Items]
Derivative, Swap Type, Fixed Price	90.00
Swap [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q2 [Member] | NYMEX [Member] | Maximum [Member]
Derivative [Line Items]
Derivative, Swap Type, Fixed Price	90.00
Swap [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q2 [Member] | LLS [Member]
Derivative [Line Items]
Volume per Day	16,000
Weighted average swap price	93.65
Weighted average sold put price	68.00
Swap [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q2 [Member] | LLS [Member] | Minimum [Member]
Derivative [Line Items]
Derivative, Swap Type, Fixed Price	93.20
Swap [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q2 [Member] | LLS [Member] | Maximum [Member]
Derivative [Line Items]
Derivative, Swap Type, Fixed Price	94.00
Swap [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q3 [Member] | NYMEX [Member]
Derivative [Line Items]
Volume per Day	10,000
Weighted average swap price	90.02
Weighted average sold put price	65.30
Swap [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q3 [Member] | NYMEX [Member] | Minimum [Member]
Derivative [Line Items]
Derivative, Swap Type, Fixed Price	90.00
Swap [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q3 [Member] | NYMEX [Member] | Maximum [Member]
Derivative [Line Items]
Derivative, Swap Type, Fixed Price	90.10
Swap [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q3 [Member] | LLS [Member]
Derivative [Line Items]
Volume per Day	16,000
Weighted average swap price	93.65
Weighted average sold put price	68.00
Swap [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q3 [Member] | LLS [Member] | Minimum [Member]
Derivative [Line Items]
Derivative, Swap Type, Fixed Price	93.20
Swap [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q3 [Member] | LLS [Member] | Maximum [Member]
Derivative [Line Items]
Derivative, Swap Type, Fixed Price	94.00
Swap [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q4 [Member] | NYMEX [Member]
Derivative [Line Items]
Volume per Day	10,000
Weighted average swap price	92.18
Weighted average sold put price	68.00
Swap [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q4 [Member] | NYMEX [Member] | Minimum [Member]
Derivative [Line Items]
Derivative, Swap Type, Fixed Price	91.15
Swap [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q4 [Member] | NYMEX [Member] | Maximum [Member]
Derivative [Line Items]
Derivative, Swap Type, Fixed Price	94.00
Swap [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q4 [Member] | LLS [Member]
Derivative [Line Items]
Volume per Day	8,000
Weighted average swap price	94.94
Weighted average sold put price	68.00
Swap [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q4 [Member] | LLS [Member] | Minimum [Member]
Derivative [Line Items]
Derivative, Swap Type, Fixed Price	93.80
Swap [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q4 [Member] | LLS [Member] | Maximum [Member]
Derivative [Line Items]
Derivative, Swap Type, Fixed Price	96.50
Swap [Member] | Crude Oil Contracts [Member] | Year 2016 [Member] | Q1 [Member] | NYMEX [Member]
Derivative [Line Items]
Volume per Day	6,000
Weighted average swap price	92.65
Weighted average sold put price	68.00
Swap [Member] | Crude Oil Contracts [Member] | Year 2016 [Member] | Q1 [Member] | NYMEX [Member] | Minimum [Member]
Derivative [Line Items]
Derivative, Swap Type, Fixed Price	92.65
Swap [Member] | Crude Oil Contracts [Member] | Year 2016 [Member] | Q1 [Member] | NYMEX [Member] | Maximum [Member]
Derivative [Line Items]
Derivative, Swap Type, Fixed Price	92.65
Swap [Member] | Crude Oil Contracts [Member] | Year 2016 [Member] | Q1 [Member] | LLS [Member]
Derivative [Line Items]
Volume per Day	6,000
Weighted average swap price	95.18
Weighted average sold put price	68.00
Swap [Member] | Crude Oil Contracts [Member] | Year 2016 [Member] | Q1 [Member] | LLS [Member] | Minimum [Member]
Derivative [Line Items]
Derivative, Swap Type, Fixed Price	94.85
Swap [Member] | Crude Oil Contracts [Member] | Year 2016 [Member] | Q1 [Member] | LLS [Member] | Maximum [Member]
Derivative [Line Items]
Derivative, Swap Type, Fixed Price	95.45
Collar [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q1 [Member] | NYMEX [Member]
Derivative [Line Items]
Volume per Day	24,000
Derivative, Floor Price	80.00
Derivative, Cap Price	100.90
Weighted average floor price	80.00
Weighted average ceiling price	96.75
Collar [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q1 [Member] | LLS [Member]
Derivative [Line Items]
Volume per Day	4,000
Derivative, Floor Price	85.00
Derivative, Cap Price	102.20
Weighted average floor price	85.00
Weighted average ceiling price	102.10
Collar [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q2 [Member] | NYMEX [Member]
Derivative [Line Items]
Volume per Day	30,000
Derivative, Floor Price	80.00
Derivative, Cap Price	95.25
Weighted average floor price	80.00
Weighted average ceiling price	94.72
Collar [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q2 [Member] | LLS [Member]
Derivative [Line Items]
Volume per Day	4,000
Derivative, Floor Price	85.00
Derivative, Cap Price	102.50
Weighted average floor price	85.00
Weighted average ceiling price	101.75
Collar [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q3 [Member] | NYMEX [Member]
Derivative [Line Items]
Volume per Day	28,000
Derivative, Floor Price	80.00
Derivative, Cap Price	95.25
Weighted average floor price	80.00
Weighted average ceiling price	95.05
Collar [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q3 [Member] | LLS [Member]
Derivative [Line Items]
Volume per Day	4,000
Derivative, Floor Price	85.00
Derivative, Cap Price	100.00
Weighted average floor price	85.00
Weighted average ceiling price	99.50
Collar [Member] | Natural Gas Contracts [Member] | Year 2014 [Member] | NYMEX [Member]
Derivative [Line Items]
Volume per Day	14,000
Derivative, Floor Price	4.00
Derivative, Cap Price	4.47
Weighted average floor price	4.00
Weighted average ceiling price	4.45
Collar [Member] | Natural Gas Contracts [Member] | Year 2015 [Member] | NYMEX [Member]
Derivative [Line Items]
Volume per Day	8,000
Derivative, Floor Price	4.00
Derivative, Cap Price	4.53
Weighted average floor price	4.00
Weighted average ceiling price	4.51
Three-way Collar [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q4 [Member] | NYMEX [Member]
Derivative [Line Items]
Volume per Day	8,000
Derivative, Floor Price	85.00
Derivative, Cap Price	102.00
Weighted average sold put price	68.00
Weighted average floor price	85.00
Weighted average ceiling price	98.50
Three-way Collar [Member] | Crude Oil Contracts [Member] | Year 2015 [Member] | Q4 [Member] | LLS [Member]
Derivative [Line Items]
Volume per Day	8,000
Derivative, Floor Price	88.00
Derivative, Cap Price	104.25
Weighted average sold put price	68.00
Weighted average floor price	88.00
Weighted average ceiling price	100.99
Three-way Collar [Member] | Crude Oil Contracts [Member] | Year 2016 [Member] | Q1 [Member] | NYMEX [Member]
Derivative [Line Items]
Volume per Day	6,000
Derivative, Floor Price	85.00
Derivative, Cap Price	99.50
Weighted average sold put price	68.00
Weighted average floor price	85.00
Weighted average ceiling price	99.50
Three-way Collar [Member] | Crude Oil Contracts [Member] | Year 2016 [Member] | Q1 [Member] | LLS [Member]
Derivative [Line Items]
Volume per Day	4,000
Derivative, Floor Price	88.00
Derivative, Cap Price	102.00
Weighted average sold put price	68.00
Weighted average floor price	88.00
Weighted average ceiling price	101.58