Derivative Financial Instruments - Summary of Notional Amounts and Estimated Fair Values of Oil and Gas Derivative Positions Outstanding (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Derivative assets, Estimated Fair Value	$ 27,445	$ 41,099
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Interest Receivable and Other Assets	Interest Receivable and Other Assets
Derivative liabilities, Estimated Fair Value	$ (25,520)	$ (39,176)
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities	Other Liabilities
Not Designated as Hedging Instrument [Member] | Oil and Natural Gas Swaps and Options [Member]
Derivatives, Fair Value [Line Items]
Derivative assets, Estimated Fair Value	$ 27,445	$ 41,099
Derivative liabilities, Estimated Fair Value	(25,520)	(39,176)
Not Designated as Hedging Instrument [Member] | Oil and Natural Gas Swaps and Options [Member] | Oil [Member]
Derivatives, Fair Value [Line Items]
Derivative assets, Notional Amount	4,489	3,896
Derivative liabilities, Notional Amount	(4,489)	(3,896)
Derivative assets, Estimated Fair Value	5,892	20,567
Derivative liabilities, Estimated Fair Value	(4,822)	(19,512)
Not Designated as Hedging Instrument [Member] | Oil and Natural Gas Swaps and Options [Member] | Natural Gas [Member]
Derivatives, Fair Value [Line Items]
Derivative assets, Notional Amount	40,106	46,140
Derivative liabilities, Notional Amount	(40,106)	(46,140)
Derivative assets, Estimated Fair Value	21,553	20,532
Derivative liabilities, Estimated Fair Value	$ (20,698)	$ (19,664)