Derivative Financial Instruments (Details 2) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Derivative [Line Items]
Oil, natural gas and natural gas liquids (NGL) derivatives	$ 9,445	$ 16,284
Summary of gross liability balances of derivative instruments
Net amounts of liabilities presented in the condensed consolidated balance sheet	0	0
Current assets
Derivative [Line Items]
Gross amounts of recognized assets	16,196	16,767
Derivative Asset, Fair Value, Gross Liability	4,230	483
Oil, natural gas and natural gas liquids (NGL) derivatives	11,966	16,284
Other assets
Derivative [Line Items]
Gross amounts of recognized assets	5,442
Derivative Asset, Fair Value, Gross Liability	5,382
Oil, natural gas and natural gas liquids (NGL) derivatives	60
Current liabilities
Summary of gross liability balances of derivative instruments
Gross amounts of recognized liabilities	(4,529)	(483)
Gross amounts netted in the condensed consolidated balance sheet	(4,230)	(483)
Net amounts of liabilities presented in the condensed consolidated balance sheet	(299)	$ 0
Other liabilities
Summary of gross liability balances of derivative instruments
Gross amounts of recognized liabilities	(7,664)
Gross amounts netted in the condensed consolidated balance sheet	(5,382)
Net amounts of liabilities presented in the condensed consolidated balance sheet	$ (2,282)

Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.

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