Fair Value Measurements (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Aug. 10, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt, Gross	$ 618,954		$ 514,400
Long-term Debt, Fair Value			634,600
Financial assets:
Commodity derivative assets – current	11,478		75,506
Derivative assets	2,092		25,449
Total financial assets	13,570		100,955
Financial liabilities:
Derivative liabilities, current	50,372		85,106
Derivative liabilities, noncurrent	23,815		28,434
Derivative Liability	74,187		113,540
Commodity contracts
Financial liabilities:
Derivative Liability	$ 59,100
Commodity contracts | Crude Oil
Financial liabilities:
Underlying basis	WTI
Commodity contracts | MEH
Financial liabilities:
Underlying basis	MEH
Interest Rate Swap
Financial liabilities:
Derivative Liability	$ 1,500
Fair Value, Measurements, Recurring | Commodity contracts
Financial assets:
Commodity derivative assets – current	11,478		75,506
Derivative assets	2,092		25,449
Total financial assets	13,570		100,955
Financial liabilities:
Derivative liabilities, current	(48,892)		(81,451)
Derivative liabilities, noncurrent	(23,815)		26,789
Derivative Liability	(74,187)		113,540
Fair Value, Measurements, Recurring | Commodity contracts | Level 1
Financial assets:
Commodity derivative assets – current	0		0
Derivative assets	0		0
Total financial assets	0		0
Financial liabilities:
Derivative liabilities, current	0		0
Derivative liabilities, noncurrent	0		0
Derivative Liability	0		0
Fair Value, Measurements, Recurring | Commodity contracts | Level 2
Financial assets:
Commodity derivative assets – current	11,478		75,506
Derivative assets	2,092		25,449
Total financial assets	13,570		100,955
Financial liabilities:
Derivative liabilities, current	(48,892)		(81,451)
Derivative liabilities, noncurrent	(23,815)		26,789
Derivative Liability	(74,187)		113,540
Fair Value, Measurements, Recurring | Commodity contracts | Level 3
Financial assets:
Commodity derivative assets – current	0		0
Derivative assets	0		0
Total financial assets	0		0
Financial liabilities:
Derivative liabilities, current	0		0
Derivative liabilities, noncurrent	0		0
Derivative Liability	0		0
Fair Value, Measurements, Recurring | Interest Rate Swap
Financial liabilities:
Derivative liabilities, current	(1,480)		(3,655)
Derivative liabilities, noncurrent			1,645
Fair Value, Measurements, Recurring | Interest Rate Swap | Level 1
Financial liabilities:
Derivative liabilities, current	0		0
Derivative liabilities, noncurrent			0
Fair Value, Measurements, Recurring | Interest Rate Swap | Level 2
Financial liabilities:
Derivative liabilities, current	(1,480)		(3,655)
Derivative liabilities, noncurrent			1,645
Fair Value, Measurements, Recurring | Interest Rate Swap | Level 3
Financial liabilities:
Derivative liabilities, current	0		0
Derivative liabilities, noncurrent			0
Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt, Gross	$ 400,000		$ 0
Senior Notes | Senior Notes Due 2026
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate		9.25%