Income Taxes - Summary of Reconciliation of Statutory Federal Tax and Effective Income Tax Rates (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure Income Taxes Summary Of Reconciliation Of Statutory Federal Tax And Effective Income Tax Rates [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%
Reconciliation of Effective Income Tax Rates Continuing Operations
Federal income tax expense (1)	[1]	$ 24,214	$ 25,982	$ 23,666
State income taxes, net of federal benefit		4,377	7,714	6,371
ESOP dividend deduction		(184)	(177)	(180)
Other		(329)	313	293
Total Income Tax		$ 28,078	$ 33,832	$ 29,231
Effective Income Tax Rate		24.35%	27.34%	25.94%
Net Operating Losses and Tax Carryback		$ 0	$ 0	$ (919)

[1] Federal income taxes were calculated at 21 percent for 2023, 2022, and 2021.