Derivative Financial Instruments (Schedule of Notional Amounts and Estimated Fair Values of Commodity Derivative Positions) (Detail) bbl in Thousands, MMBTU in Thousands, $ in Thousands	Dec. 31, 2023 USD ($) MMBTU bbl	Dec. 31, 2022 USD ($) bbl MMBTU
Financial Institution Counterparties [Member] | Oil Commodity Derivative [Member]
Derivative Instruments [Line Items]
Oil/Natural Gas Derivative Assets Notional Amount | bbl	5,601	4,024
Oil/Natural Gas Derivative Assets, Estimated Fair Value	$ 37,667	$ 27,082
Oil/Natural Gas Derivative Liabilities Notional Amount | bbl	4,581	6,068
Oil/Natural Gas Derivative Liabilities, Estimated Fair Value	$ (18,500)	$ (53,579)
Financial Institution Counterparties [Member] | Natural Gas Commodity Derivative [Member]
Derivative Instruments [Line Items]
Oil/Natural Gas Derivative Assets Notional Amount | MMBTU	17,363	16,539
Oil/Natural Gas Derivative Assets, Estimated Fair Value	$ 11,822	$ 6,220
Oil/Natural Gas Derivative Liabilities Notional Amount | MMBTU	6,462	15,682
Oil/Natural Gas Derivative Liabilities, Estimated Fair Value	$ (2,499)	$ (19,138)
Customer Counterparties [Member] | Oil Commodity Derivative [Member]
Derivative Instruments [Line Items]
Oil/Natural Gas Derivative Assets Notional Amount | bbl	4,618	6,068
Oil/Natural Gas Derivative Assets, Estimated Fair Value	$ 18,722	$ 54,219
Oil/Natural Gas Derivative Liabilities Notional Amount | bbl	5,564	4,024
Oil/Natural Gas Derivative Liabilities, Estimated Fair Value	$ (36,877)	$ (26,551)
Customer Counterparties [Member] | Natural Gas Commodity Derivative [Member]
Derivative Instruments [Line Items]
Oil/Natural Gas Derivative Assets Notional Amount | MMBTU	6,462	15,682
Oil/Natural Gas Derivative Assets, Estimated Fair Value	$ 2,499	$ 19,164
Oil/Natural Gas Derivative Liabilities Notional Amount | MMBTU	17,363	16,539
Oil/Natural Gas Derivative Liabilities, Estimated Fair Value	$ (11,571)	$ (6,124)