Income Taxes - Income Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Current federal income tax	$ 48,648	$ 44,335	$ 50,429
Current state income tax	307	346	175
Deferred federal income tax expense (benefit)	(620)	(359)	(4,205)
Income tax expense	$ 48,335	$ 44,322	$ 46,399