Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Summary Of Significant Accounting Policies [Line Items]
Allowance for doubtful accounts	$ 1,635	$ 1,540
Capitalized exploratory drilling costs pending evaluation	0	0
Amortization expense including write-off of debt issuance costs	600	3,300
Impairment expense for proved/unproved properties	$ 0	476,936
Chance of tax benefit likely to be realized	greater than 50%
Southern California Pipeline Incident and Oil Release
Summary Of Significant Accounting Policies [Line Items]
LOPI insurance payments recognized	$ 6,700
LOPI coverage period	18 months
Proved Developed And Producing Oil And Gas Properties [Member]
Summary Of Significant Accounting Policies [Line Items]
Impairment expense for proved/unproved properties	$ 0	427,600
Unproved Oil and Natural Gas Properties [Member]
Summary Of Significant Accounting Policies [Line Items]
Impairment expense for unproved leasehold costs	$ 0	$ 49,300
Minimum | Other Property & Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives	3 years
Minimum | Support Equipment and Facilities [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives	12 years
Maximum | Other Property & Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives	7 years
Maximum | Support Equipment and Facilities [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives	24 years