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, 2022 USD ($) bbl MMBTU	Dec. 31, 2021 USD ($) MMBTU bbl
Financial Institution Counterparties [Member] \| Oil Commodity Derivative [Member]
Derivative Instruments [Line Items]
Oil/Natural Gas Derivative Assets Notional Amount \| bbl	4,024	4,809
Oil/Natural Gas Derivative Assets, Estimated Fair Value	$ 27,082	$ 14,721
Oil/Natural Gas Derivative Liabilities Notional Amount \| bbl	6,068	7,032
Oil/Natural Gas Derivative Liabilities, Estimated Fair Value	$ (53,579)	$ (73,594)
Financial Institution Counterparties [Member] \| Natural Gas Commodity Derivative [Member]
Derivative Instruments [Line Items]
Oil/Natural Gas Derivative Assets Notional Amount \| MMBTU	16,539	15,947
Oil/Natural Gas Derivative Assets, Estimated Fair Value	$ 6,220	$ 4,143
Oil/Natural Gas Derivative Liabilities Notional Amount \| MMBTU	15,682	29,446
Oil/Natural Gas Derivative Liabilities, Estimated Fair Value	$ (19,138)	$ (21,249)
Customer Counterparties [Member] \| Oil Commodity Derivative [Member]
Derivative Instruments [Line Items]
Oil/Natural Gas Derivative Assets Notional Amount \| bbl	6,068	7,046
Oil/Natural Gas Derivative Assets, Estimated Fair Value	$ 54,219	$ 74,437
Oil/Natural Gas Derivative Liabilities Notional Amount \| bbl	4,024	4,796
Oil/Natural Gas Derivative Liabilities, Estimated Fair Value	$ (26,551)	$ (14,294)
Customer Counterparties [Member] \| Natural Gas Commodity Derivative [Member]
Derivative Instruments [Line Items]
Oil/Natural Gas Derivative Assets Notional Amount \| MMBTU	15,682	29,446
Oil/Natural Gas Derivative Assets, Estimated Fair Value	$ 19,164	$ 21,456
Oil/Natural Gas Derivative Liabilities Notional Amount \| MMBTU	16,539	15,947
Oil/Natural Gas Derivative Liabilities, Estimated Fair Value	$ (6,124)	$ (4,124)