Available for Sale Securities - Summary of Amortized Costs and Fair Value of Securities Available-for-sale (Detail) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Marketable Securities [Line Items]
Securities Available for Sale, Amortized Cost	$ 107,383	$ 119,055
Securities Available for Sale, Gross Unrealized Gains	515	308
Securities Available for Sale, Gross Unrealized Losses	(7,583)	(9,804)
Available for sale securities	100,315	109,559
Obligations of states and political subdivisions [Member]
Marketable Securities [Line Items]
Securities Available for Sale, Amortized Cost	16,835	17,043
Securities Available for Sale, Gross Unrealized Gains	4	3
Securities Available for Sale, Gross Unrealized Losses	(2,184)	(2,815)
Available for sale securities	14,655	14,231
Government-sponsored Mortgage-backed Securities [Member]
Marketable Securities [Line Items]
Securities Available for Sale, Amortized Cost	87,837	97,674
Securities Available for Sale, Gross Unrealized Gains	505	305
Securities Available for Sale, Gross Unrealized Losses	(5,394)	(6,960)
Available for sale securities	82,948	91,019
Asset-backed securities [Member]
Marketable Securities [Line Items]
Securities Available for Sale, Amortized Cost	2,711	3,593
Securities Available for Sale, Gross Unrealized Gains	6	0
Securities Available for Sale, Gross Unrealized Losses	(5)	(21)
Available for sale securities	$ 2,712	3,572
Certificates of deposit [Member]
Marketable Securities [Line Items]
Securities Available for Sale, Amortized Cost		745
Securities Available for Sale, Gross Unrealized Gains		0
Securities Available for Sale, Gross Unrealized Losses		(8)
Available for sale securities		$ 737