Derivative Financial Instruments (Details 2) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Derivative [Line Items]
Oil, natural gas and natural gas liquids (NGL) derivatives	$ 0	$ 16,284
Summary of gross liability balances of derivative instruments
Oil, natural gas and natural gas liquids (NGL) derivatives	(17,181)	0
Current assets
Derivative [Line Items]
Gross amounts of recognized assets	4,316	16,767
Gross amounts netted in the condensed consolidated balance sheets	(4,199)	(483)
Oil, natural gas and natural gas liquids (NGL) derivatives	117	16,284
Other assets
Derivative [Line Items]
Gross amounts of recognized assets	2,421
Gross amounts netted in the condensed consolidated balance sheets	(2,421)
Oil, natural gas and natural gas liquids (NGL) derivatives	0
Current liabilities
Summary of gross liability balances of derivative instruments
Gross amounts of recognized liabilities	(13,959)	(483)
Gross amounts netted in the condensed consolidated balance sheet	4,199	483
Oil, natural gas and natural gas liquids (NGL) derivatives	(9,760)	$ 0
Other liabilities
Summary of gross liability balances of derivative instruments
Gross amounts of recognized liabilities	(9,959)
Gross amounts netted in the condensed consolidated balance sheet	2,421
Oil, natural gas and natural gas liquids (NGL) derivatives	$ (7,538)

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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