Financial Instruments - Summary of Additional Information Related to Financial Instruments Measured at Fair Value on Recurring Basis (Details) - Fair Value on Recurring Basis - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Liabilities:
Total net asset (liability)	$ 40,442	$ (11,594)
Oil And Natural Gas Swaps And Costless Collars
Assets:
Oil and natural gas swaps and costless collars	74,075	8,393
Liabilities:
Oil and natural gas swaps and costless collars	(33,633)	(19,987)
Level 2
Liabilities:
Total net asset (liability)	40,442	(11,594)
Level 2 \| Oil And Natural Gas Swaps And Costless Collars
Assets:
Oil and natural gas swaps and costless collars	74,075	8,393
Liabilities:
Oil and natural gas swaps and costless collars	$ (33,633)	$ (19,987)

Fair value, after the 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 not subject to a master netting arrangement and not elected to be offset.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313

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