Derivative Financial Instruments - Summary of Notional Amounts and Estimated Fair Values of Oil and Gas Derivative Positions Outstanding (Detail) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Derivatives, Fair Value [Line Items]
Derivative assets, Estimated Fair Value	$ 16,144	$ 10,479
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Interest Receivable and Other Assets	Interest Receivable and Other Assets
Derivative liabilities, Estimated Fair Value	$ (14,582)	$ (9,105)
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	$ 16,144	$ 10,479
Derivative liabilities, Estimated Fair Value	(14,582)	(9,105)
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	2,504	2,404
Derivative liabilities, Notional Amount	(2,504)	(2,404)
Derivative assets, Estimated Fair Value	13,258	7,507
Derivative liabilities, Estimated Fair Value	(12,644)	(6,860)
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	36,520	25,561
Derivative liabilities, Notional Amount	(36,520)	(25,561)
Derivative assets, Estimated Fair Value	2,886	2,972
Derivative liabilities, Estimated Fair Value	$ (1,938)	$ (2,245)