Fair Value Measurements - Level 3 Measurements of Derivative Commodity Instruments (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($) $ / Mcf $ / bbl gal
Fair Value Inputs, Derivatives, Quantitative Information [Line Items]
Derivative liabilities	$ (30,952)
Discounted Cash Flow Valuation Technique | Level 3 | Oil Basis - WTI/WTI | 2016
Fair Value Inputs, Derivatives, Quantitative Information [Line Items]
Derivative liabilities	$ (1,845)
Discounted Cash Flow Valuation Technique | Level 3 | Oil Basis - WTI/WTI | 2016 | Minimum
Fair Value Inputs, Derivatives, Quantitative Information [Line Items]
Price per barrel (in dollars per Bbl) | $ / bbl	(0.45)
Discounted Cash Flow Valuation Technique | Level 3 | Oil Basis - WTI/WTI | 2016 | Maximum
Fair Value Inputs, Derivatives, Quantitative Information [Line Items]
Price per barrel (in dollars per Bbl) | $ / bbl	(0.82)
Discounted Cash Flow Valuation Technique | Level 3 | Oil Basis - WTS/WTI | 2016
Fair Value Inputs, Derivatives, Quantitative Information [Line Items]
Derivative liabilities	$ (36)
Discounted Cash Flow Valuation Technique | Level 3 | Oil Basis - WTS/WTI | 2016 | Minimum
Fair Value Inputs, Derivatives, Quantitative Information [Line Items]
Price per barrel (in dollars per Bbl) | $ / bbl	(1.50)
Discounted Cash Flow Valuation Technique | Level 3 | Oil Basis - WTS/WTI | 2016 | Maximum
Fair Value Inputs, Derivatives, Quantitative Information [Line Items]
Price per barrel (in dollars per Bbl) | $ / bbl	(1.53)
Discounted Cash Flow Valuation Technique | Level 3 | Natural Gas Liquids | 2017
Fair Value Inputs, Derivatives, Quantitative Information [Line Items]
Derivative liabilities	$ (954)
Price per barrel (in dollars per Bbl) | gal	0.54
Discounted Cash Flow Valuation Technique | Level 3 | Natural Gas Basis - Permian | 2016
Fair Value Inputs, Derivatives, Quantitative Information [Line Items]
Derivative liabilities	$ 997
Discounted Cash Flow Valuation Technique | Level 3 | Natural Gas Basis - Permian | 2016 | Minimum
Fair Value Inputs, Derivatives, Quantitative Information [Line Items]
Price per cubic foot (in dollars per Mcf) | $ / Mcf	(0.07)
Discounted Cash Flow Valuation Technique | Level 3 | Natural Gas Basis - Permian | 2016 | Maximum
Fair Value Inputs, Derivatives, Quantitative Information [Line Items]
Price per cubic foot (in dollars per Mcf) | $ / Mcf	(0.11)
Discounted Cash Flow Valuation Technique | Level 3 | Natural Gas Basis - Permian | 2017
Fair Value Inputs, Derivatives, Quantitative Information [Line Items]
Derivative liabilities	$ 465
Discounted Cash Flow Valuation Technique | Level 3 | Natural Gas Basis - Permian | 2017 | Minimum
Fair Value Inputs, Derivatives, Quantitative Information [Line Items]
Price per cubic foot (in dollars per Mcf) | $ / Mcf	(0.19)
Discounted Cash Flow Valuation Technique | Level 3 | Natural Gas Basis - Permian | 2017 | Maximum
Fair Value Inputs, Derivatives, Quantitative Information [Line Items]
Price per cubic foot (in dollars per Mcf) | $ / Mcf	(0.21)