Derivative Activities - Derivative Volumes Hedged and Average Hedge Prices (Detail)	Dec. 31, 2019 MMBTU / d bbl / d $ / MMBTU $ / bbl $ / gal
2020 Commodity Contract | Swaps | Natural Gas
Derivative [Line Items]
Volume Hedged | MMBTU / d	1,000,984
Weighted Average Hedge Price | $ / MMBTU	2.64	[1]
2020 Commodity Contract | Swaps | Crude Oil
Derivative [Line Items]
Volume Hedged	7,995
Weighted Average Hedge Price | $ / bbl	58.27	[1]
2021 Commodity Contract | Swaps | Natural Gas
Derivative [Line Items]
Volume Hedged | MMBTU / d	50,000
Weighted Average Hedge Price | $ / MMBTU	2.62	[1]
2021 Commodity Contract | Swaps | Crude Oil
Derivative [Line Items]
Volume Hedged	1,000
Weighted Average Hedge Price | $ / bbl	55.00	[1]
April-September, 2020 Commodity Contract | Calls | Crude Oil
Derivative [Line Items]
Volume Hedged	500
Weighted Average Hedge Price | $ / bbl	59.00
January-March, 2020 Commodity Contract | Swaps | NGLs (NC4-Normal Butane)
Derivative [Line Items]
Volume Hedged	659
Weighted Average Hedge Price | $ / gal	0.73
January-March, 2020 Commodity Contract | Swaps | NGLs (C5-Natural Gasoline)
Derivative [Line Items]
Volume Hedged	4,297
Weighted Average Hedge Price | $ / gal	1.21

[1] We also sold natural gas call swaptions of 140,000 Mmbtu/day for March-December 2020 at a weighted average price of $2.53 and 100,000 Mmbtu per day for 2021 at a weighted average price of $2.69. In addition, we sold call swaptions of 3,000 bbls per day for 2021 at a weighted average price of $56.50.