Derivative Financial Instruments (Details)		1 Months Ended		3 Months Ended
	May 01, 2017 MBbls	May 31, 2017 $ / bbl MBbls	Apr. 30, 2017 $ / bbl MBbls	Mar. 31, 2017 $ / bbl MBbls
Term April 2017 To December 2017 | Three-way Collars
Derivative Financial Instruments
Volumes (in MBbl) | MBbls				2,012
Weighted average deferred premium payable per Bbl				2.57
Weighted average sold put price per Bbl				30.00
Weighted average floor price per Bbl				45.00
Weighted average ceiling price per Bbl				57.50
Term April 2017 To December 2017 | Swaps with puts
Derivative Financial Instruments
Volumes (in MBbl) | MBbls				1,505
Weighted average swap price per Bbl				64.95
Weighted average sold put price per Bbl				50.00
Term April 2017 To December 2017 | Sold calls
Derivative Financial Instruments
Volumes (in MBbl) | MBbls				1,500
Weighted average ceiling price per Bbl				85.00
Term April 2017 To December 2017 | Swap with puts/calls
Derivative Financial Instruments
Volumes (in MBbl) | MBbls				1,505
Weighted average deferred premium payable per Bbl				2.13
Weighted average swap price per Bbl				72.50
Weighted average sold put price per Bbl				55.00
Weighted average purchased call price per Bbl				90.00
Term April 2017 To June 2017 | Sold calls
Derivative Financial Instruments
Weighted average ceiling price per Bbl		55.00
Term July 2017 To December 2017 | Sold calls
Derivative Financial Instruments
Volumes (in MBbl) | MBbls		1,000
Weighted average ceiling price per Bbl		60.00
Term January 2018 to December 2018 | Sold put
Derivative Financial Instruments
Volumes (in MBbl) | MBbls	1,000
Weighted average sold put price per Bbl		40.00
Term January 2018 to December 2018 | Three-way Collars
Derivative Financial Instruments
Volumes (in MBbl) | MBbls			1,000	2,913
Weighted average deferred premium payable per Bbl			2.15	0.74
Weighted average sold put price per Bbl				41.57
Weighted average floor price per Bbl			50.00	56.57
Weighted average ceiling price per Bbl			62.00	65.90
Weighted average purchased call price per Bbl			70.00
Term January 2018 to December 2018 | Four-way Collars
Derivative Financial Instruments
Volumes (in MBbl) | MBbls				2,000
Weighted average deferred premium payable per Bbl				0.93
Weighted average sold put price per Bbl				40.00
Weighted average floor price per Bbl				50.00
Weighted average ceiling price per Bbl				61.00
Weighted average purchased call price per Bbl				70.00
Term January 2018 to December 2018 | Sold calls
Derivative Financial Instruments
Volumes (in MBbl) | MBbls				2,000
Weighted average ceiling price per Bbl				65.00
Term January 2019 to December 2019 | Sold calls
Derivative Financial Instruments
Volumes (in MBbl) | MBbls				913
Weighted average ceiling price per Bbl				80.00