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Derivative Instruments - Schedule of Location and Fair Value of Outstanding Commodity Derivative Instruments (Details) - Commodity derivative instruments - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Derivative asset, gross amounts recognized	$ 329,715	$ 3,928
Derivative liability, gross amount recognized		34,498
Derivative asset, gross amounts offset	(68,054)	(2,754)
Derivative liability, gross amounts offset		(14,683)
Derivative asset, net asset	261,661	1,174
Derivative liability, net liability		19,815
Current assets
Derivatives, Fair Value [Line Items]
Derivative asset, gross amounts recognized	322,529	633
Derivative asset, gross amounts offset	(64,239)	(98)
Derivative asset, net asset	258,290	535
Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative asset, gross amounts recognized	7,186	3,295
Derivative asset, gross amounts offset	(3,815)	(2,656)
Derivative asset, net asset	$ 3,371	639
Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, gross amount recognized		33,812
Derivative liability, gross amounts offset		(14,117)
Derivative liability, net liability		19,695
Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, gross amount recognized		686
Derivative liability, gross amounts offset		(566)
Derivative liability, net liability		$ 120

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