Summary of Property and Equipment (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($) $ / bbl	Dec. 31, 2016 USD ($)	Jun. 30, 2016 $ / bbl
Property, Plant and Equipment [Abstract]
Proved Oil and Gas Property, Full Cost Method	$ 297,390	$ 251,083
Unproved Oil and Gas Property, Full Cost Method	4,122	4,719
Oil and Gas Property, Full Cost Method, Gross	301,512	255,802
Other property and equipment	3,696	3,575
Total properties and equipment	305,208	259,377
Accumulated depreciation, depletion and amortization	(32,747)	(11,904)
Property and equipment, net (successful efforts method)	272,461	247,473
Unproved Oil and Gas Property excluded	4,100	$ 4,700
Undeveloped Leasehold Costs Transferred	2,000
Capitalized Costs, Proved Properties	1,100
Interest Costs Capitalized	$ 100
Successor [Member]
Property, Plant and Equipment [Line Items]
Amortization Expense Per Physical Unit of Production | $ / bbl	11.74
Predecessor [Member]
Property, Plant and Equipment [Line Items]
Amortization Expense Per Physical Unit of Production | $ / bbl			10.02