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, 2024 USD ($) bbl MMBTU	Dec. 31, 2023 USD ($) MMBTU bbl
Financial Institution Counterparties [Member] \| Oil Commodity Derivative [Member]
Derivative Instruments [Line Items]
Oil/Natural Gas Derivative Assets Notional Amount \| bbl	7,097	5,601
Oil/Natural Gas Derivative Assets, Estimated Fair Value	$ 27,471	$ 37,667
Oil/Natural Gas Derivative Liabilities Notional Amount \| bbl	4,768	4,581
Oil/Natural Gas Derivative Liabilities, Estimated Fair Value	$ (12,897)	$ (18,500)
Financial Institution Counterparties [Member] \| Natural Gas Commodity Derivative [Member]
Derivative Instruments [Line Items]
Oil/Natural Gas Derivative Assets Notional Amount \| MMBTU	25,454	17,363
Oil/Natural Gas Derivative Assets, Estimated Fair Value	$ 3,804	$ 11,822
Oil/Natural Gas Derivative Liabilities Notional Amount \| MMBTU	26,082	6,462
Oil/Natural Gas Derivative Liabilities, Estimated Fair Value	$ (4,054)	$ (2,499)
Customer Counterparties [Member] \| Oil Commodity Derivative [Member]
Derivative Instruments [Line Items]
Oil/Natural Gas Derivative Assets Notional Amount \| bbl	4,872	4,618
Oil/Natural Gas Derivative Assets, Estimated Fair Value	$ 12,973	$ 18,722
Oil/Natural Gas Derivative Liabilities Notional Amount \| bbl	6,993	5,564
Oil/Natural Gas Derivative Liabilities, Estimated Fair Value	$ (26,753)	$ (36,877)
Customer Counterparties [Member] \| Natural Gas Commodity Derivative [Member]
Derivative Instruments [Line Items]
Oil/Natural Gas Derivative Assets Notional Amount \| MMBTU	26,767	6,462
Oil/Natural Gas Derivative Assets, Estimated Fair Value	$ 4,255	$ 2,499
Oil/Natural Gas Derivative Liabilities Notional Amount \| MMBTU	24,769	17,363
Oil/Natural Gas Derivative Liabilities, Estimated Fair Value	$ (3,600)	$ (11,571)