Income Tax - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Deferred tax asset:
Oil and gas properties and equipment	$ 11,613	$ 62,616	$ 93,854
Federal tax loss carryforwards	306,743	140,059	114,652
Derivative instruments and other			1,064
Interest expense limitation carryforward	25,932
Operating lease right-of-use liabilities	8,278
Other, net	5,240	7,398	4,639
Deferred tax asset	357,806	210,073	214,209
Valuation allowance	(343,577)	(208,324)	(213,800)
Net deferred tax assets	14,229	1,749	409
Deferred tax liability:
Derivative instruments and other	6,009	1,197
Other, net		552	409
Operating lease right-of-use assets	8,220
Net deferred tax liability	$ 14,229	$ 1,749	$ 409