Securities Sold Under Agreements to Repurchase - Schedule of Securities Sold Under Agreements to Repurchase (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Disclosure [Abstract]
Outstanding balance at year end	$ 0	$ 25,143	$ 25,495
Average balance during the year	$ 8,685	$ 24,390	$ 24,390
Average interest rate during the year	0.05%	0.05%	0.09%
Maximum month-end balance during the year	$ 21,658	$ 26,044	$ 34,200
Weighted average interest rate at year end	0.00%	0.05%	0.05%