Supplemental Oil and Gas Disclosures - Standardized Measure of Discounted Future Net Cash Flows from Projected Production (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Oct. 21, 2016	Oct. 20, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Standardized measure of discounted future net cash flows
Future cash inflows	$ 4,186,389
Future production costs	(2,078,640)
Future development costs	(692,533)
Future income tax expense	(106,563)
Future net cash flows	1,308,653
10% annual discount for estimated timing of cash flows	(778,703)
Standardized measure of discounted future net cash flows	$ 529,950	$ 349,905
Predecessor
Standardized measure of discounted future net cash flows
Future cash inflows				$ 1,902,184	$ 8,405,916
Future production costs				(1,024,314)	(2,669,000)
Future development costs				(47,532)	(751,353)
Future income tax expense					(1,113,908)
Future net cash flows				830,338	3,871,655
10% annual discount for estimated timing of cash flows				(317,519)	(1,998,294)
Standardized measure of discounted future net cash flows			$ 349,905	$ 512,819	$ 1,873,361	$ 1,790,446