Supplemental Information About Oil & Natural Gas Producing Activities (Unaudited) - Principal Source of Change in Standardized Measure of Discounted Cash Flow (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2016	Oct. 10, 2016	Dec. 31, 2015	Dec. 31, 2014
Successor
Changes in Standardized Measure of Discounted Future Net Cash Flows [Line Items]
Standardized measure of discounted future net cash flows, beginning of period	$ 209,713
Sales of oil, natural gas and NGLs, net of production costs	(22,354)
Purchase of minerals in place	127,842
Divestiture of minerals in place	0
Extensions and discoveries, net of future development costs	55,825
Change in estimated development costs	10,891
Net change in prices and production costs	(978)
Change in estimated future development costs	571
Revisions of previous quantity estimates	20,190
Accretion of discount	4,753
Net change in income taxes	(47,990)
Net change in timing of production and other	16,629
Standardized measure of discounted future net cash flows, end of period	375,092	$ 209,713
Predecessor
Changes in Standardized Measure of Discounted Future Net Cash Flows [Line Items]
Standardized measure of discounted future net cash flows, beginning of period	$ 209,713	135,069	$ 365,883	$ 371,307
Sales of oil, natural gas and NGLs, net of production costs		(49,801)	(58,534)	(102,488)
Purchase of minerals in place		10,145	14,416	5,650
Divestiture of minerals in place		0	0	(242,344)
Extensions and discoveries, net of future development costs		46,438	57,894	312,532
Change in estimated development costs		11,743	16,100	10,386
Net change in prices and production costs		6,661	(494,734)	(3,027)
Change in estimated future development costs		28,998	247,642	2,935
Revisions of previous quantity estimates		3,673	(51,342)	924
Accretion of discount		11,319	37,517	13,561
Net change in income taxes		(1,568)	1,601	(2,762)
Net change in timing of production and other		7,036	(1,374)	(791)
Standardized measure of discounted future net cash flows, end of period		$ 209,713	$ 135,069	$ 365,883