Derivative Activities - Schedule of Additional Information Related to Master Netting Arrangements with Derivative Counterparties (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Derivative [Line Items]
Gross Amounts of Recognized Assets		$ 152,692
Gross Amounts Offset in the Balance Sheet		(15,138)
Net Amounts of Assets Presented in the Balance Sheet		137,554
Gross Amounts of Recognized (Liabilities)	$ (54,370)	(29,206)
Gross Amounts Offset in the Balance Sheet	39,063	15,138
Net Amounts of (Liabilities) Presented in the Balance Sheet	(15,307)	(14,068)
Swaps \| NGLs (C3-Propane)
Derivative [Line Items]
Gross Amounts of Recognized (Liabilities)	(107)
Gross Amounts Offset in the Balance Sheet	107
Net Amounts of (Liabilities) Presented in the Balance Sheet	0
Commodity \| Swaps \| Natural Gas
Derivative [Line Items]
Gross Amounts of Recognized Assets	134,499	134,364
Gross Amounts Offset in the Balance Sheet	(3,174)	(2,913)
Net Amounts of Assets Presented in the Balance Sheet	131,325	131,451
Gross Amounts of Recognized (Liabilities)	(3,058)	(1,657)
Gross Amounts Offset in the Balance Sheet	3,174	2,913
Net Amounts of (Liabilities) Presented in the Balance Sheet	116	1,256
Commodity \| Swaps \| Crude Oil
Derivative [Line Items]
Gross Amounts of Recognized Assets	30,045	3,893
Gross Amounts Offset in the Balance Sheet	(832)	(4,794)
Net Amounts of Assets Presented in the Balance Sheet	29,213	(901)
Gross Amounts of Recognized (Liabilities)	(832)	(4,814)
Gross Amounts Offset in the Balance Sheet	832	4,794
Net Amounts of (Liabilities) Presented in the Balance Sheet	0	(20)
Commodity \| Swaps \| NGLs (C3-Propane)
Derivative [Line Items]
Gross Amounts of Recognized Assets	319
Gross Amounts Offset in the Balance Sheet	(244)
Net Amounts of Assets Presented in the Balance Sheet	75
Gross Amounts of Recognized (Liabilities)	(62)
Gross Amounts Offset in the Balance Sheet	62
Net Amounts of (Liabilities) Presented in the Balance Sheet	0
Commodity \| Swaps \| NGLs (iC4-Isobutane)
Derivative [Line Items]
Gross Amounts of Recognized Assets	905
Gross Amounts Offset in the Balance Sheet	0
Net Amounts of Assets Presented in the Balance Sheet	905
Commodity \| Swaps \| NGLs (NC4-Normal Butane)
Derivative [Line Items]
Gross Amounts of Recognized Assets	0
Gross Amounts Offset in the Balance Sheet	(62)
Net Amounts of Assets Presented in the Balance Sheet	(62)
Commodity \| Swaps \| NGLs (C5-Natural Gasoline)
Derivative [Line Items]
Gross Amounts of Recognized Assets	185,299	60
Gross Amounts Offset in the Balance Sheet	(39,063)	(127)
Net Amounts of Assets Presented in the Balance Sheet	146,236	(67)
Gross Amounts of Recognized (Liabilities)		(127)
Gross Amounts Offset in the Balance Sheet		127
Net Amounts of (Liabilities) Presented in the Balance Sheet		0
Commodity \| Swaps \| NGLs (C4- Butane)
Derivative [Line Items]
Gross Amounts of Recognized Assets		167
Gross Amounts Offset in the Balance Sheet		0
Net Amounts of Assets Presented in the Balance Sheet		167
Commodity \| Swaptions \| Natural Gas
Derivative [Line Items]
Gross Amounts of Recognized Assets	0	0
Gross Amounts Offset in the Balance Sheet	(3,936)	(1,325)
Net Amounts of Assets Presented in the Balance Sheet	(3,936)	(1,325)
Gross Amounts of Recognized (Liabilities)	(6,201)	(2,594)
Gross Amounts Offset in the Balance Sheet	3,936	1,325
Net Amounts of (Liabilities) Presented in the Balance Sheet	(2,265)	(1,269)
Commodity \| Swaptions \| Crude Oil
Derivative [Line Items]
Gross Amounts of Recognized Assets	0	0
Gross Amounts Offset in the Balance Sheet	(3)	(1,597)
Net Amounts of Assets Presented in the Balance Sheet	(3)	(1,597)
Gross Amounts of Recognized (Liabilities)		(2,254)
Gross Amounts Offset in the Balance Sheet		1,597
Net Amounts of (Liabilities) Presented in the Balance Sheet		(657)
Commodity \| Calls \| Natural Gas
Derivative [Line Items]
Gross Amounts of Recognized Assets	0
Gross Amounts Offset in the Balance Sheet	(41)
Net Amounts of Assets Presented in the Balance Sheet	(41)
Gross Amounts of Recognized (Liabilities)	(41)
Gross Amounts Offset in the Balance Sheet	41
Net Amounts of (Liabilities) Presented in the Balance Sheet	0
Commodity \| Calls \| Crude Oil
Derivative [Line Items]
Gross Amounts of Recognized Assets	2,046	0
Gross Amounts Offset in the Balance Sheet	(3,656)	(349)
Net Amounts of Assets Presented in the Balance Sheet	(1,610)	(349)
Gross Amounts of Recognized (Liabilities)	(3)	(349)
Gross Amounts Offset in the Balance Sheet	3	349
Net Amounts of (Liabilities) Presented in the Balance Sheet	0	0
Commodity \| Calls \| NGLs (NC4-Normal Butane)
Derivative [Line Items]
Gross Amounts of Recognized Assets	109
Gross Amounts Offset in the Balance Sheet	(107)
Net Amounts of Assets Presented in the Balance Sheet	2
Commodity \| Three Way Collars \| Natural Gas
Derivative [Line Items]
Gross Amounts of Recognized Assets	2,557
Gross Amounts Offset in the Balance Sheet	(1,305)
Net Amounts of Assets Presented in the Balance Sheet	1,252
Gross Amounts of Recognized (Liabilities)	(20,405)
Gross Amounts Offset in the Balance Sheet	12,272
Net Amounts of (Liabilities) Presented in the Balance Sheet	(8,133)
Commodity \| Basis Swap \| Natural Gas
Derivative [Line Items]
Gross Amounts of Recognized Assets	1,860	10,766
Gross Amounts Offset in the Balance Sheet	(12,272)	(1,092)
Net Amounts of Assets Presented in the Balance Sheet	(10,412)	9,674
Gross Amounts of Recognized (Liabilities)	(6,526)	(1,371)
Gross Amounts Offset in the Balance Sheet	3,656	1,092
Net Amounts of (Liabilities) Presented in the Balance Sheet	(2,870)	(279)
Commodity \| Spread Swaps \| NGLs (C3-Propane)
Derivative [Line Items]
Gross Amounts of Recognized Assets	12,959	1,913
Gross Amounts Offset in the Balance Sheet	(13,431)	(1,913)
Net Amounts of Assets Presented in the Balance Sheet	(472)	0
Gross Amounts of Recognized (Liabilities)	(11,935)	(16,040)
Gross Amounts Offset in the Balance Sheet	13,431	1,913
Net Amounts of (Liabilities) Presented in the Balance Sheet	1,496	(14,127)
Commodity \| Collars \| Natural Gas
Derivative [Line Items]
Gross Amounts of Recognized (Liabilities)	0
Gross Amounts Offset in the Balance Sheet	1,305
Net Amounts of (Liabilities) Presented in the Balance Sheet	1,305
Commodity \| Propane Swaps \| NGLs (C3-Propane)
Derivative [Line Items]
Gross Amounts of Recognized (Liabilities)	(244)
Gross Amounts Offset in the Balance Sheet	244
Net Amounts of (Liabilities) Presented in the Balance Sheet	0
Freight \| Swaps
Derivative [Line Items]
Gross Amounts of Recognized Assets		1,529
Gross Amounts Offset in the Balance Sheet		(1,028)
Net Amounts of Assets Presented in the Balance Sheet		501
Gross Amounts of Recognized (Liabilities)	(4,956)	0
Gross Amounts Offset in the Balance Sheet	0	1,028
Net Amounts of (Liabilities) Presented in the Balance Sheet	$ (4,956)	$ 1,028

Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value, after offset of derivative liability, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, before offset against an obligation to return collateral under a master netting arrangement. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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Fair value, after offset of derivative asset, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be and before offset against a right to receive collateral under a master netting arrangement. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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