Summary of Property and Equipment (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($) $ / bbl	Dec. 31, 2016 USD ($)	Sep. 30, 2016 $ / bbl	Sep. 12, 2016 $ / bbl
Property, Plant and Equipment [Abstract]
Proved Oil and Gas Property, Full Cost Method	$ 369,384	$ 251,083
Unproved Oil and Gas Property, Full Cost Method	147,594	4,719
Oil and Gas Property, Full Cost Method, Gross	516,978	255,802
Other property and equipment	12,484	3,575
Total properties and equipment	529,462	259,377
Accumulated depreciation, depletion and amortization	(43,402)	(11,904)
Property and equipment, net (successful efforts method)	486,060	247,473
Unproved Oil and Gas Property excluded	147,600	$ 4,700
Undeveloped Leasehold Costs Transferred	1,900
Capitalized Costs, Proved Properties	1,600
Interest Costs Capitalized	$ 100
Successor [Member]
Property, Plant and Equipment [Line Items]
Amortization Expense Per Physical Unit of Production | $ / bbl	11.93		11.09
Predecessor [Member]
Property, Plant and Equipment [Line Items]
Amortization Expense Per Physical Unit of Production | $ / bbl				10.04