Fair Value of Assets and Liabilities - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands		Mar. 31, 2024		Dec. 31, 2023
Assets
Interest-bearing deposits		$ 1,300
Equity securities, fair value		1,700		$ 1,700
Fair Value Recurring [Member]
Assets
Interest-bearing deposits		1,250		1,250
Investment securities		53,038		54,282
Equity securities, fair value	[1]	1,730		1,748
Total		56,018	[2]	57,280	[3]
Fair Value Recurring [Member] | Level 1 [Member]
Assets
Equity securities, fair value		1,730		1,748
Total		1,730	[2]	1,748	[3]
Fair Value Recurring [Member] | Level 2 [Member]
Assets
Interest-bearing deposits		1,250		1,250
Investment securities		53,038		54,282
Total		$ 54,288	[2]	$ 55,532	[3]

[1] Included within other assets on the balance sheet.

[2] Total unrealized losses of $0.2 million, net of tax, was included in other comprehensive income for the three months ended March 31, 2024 related to these assets.

[3] Total unrealized losses of $0.3 million, net of tax, was included in other comprehensive loss for the year ended December 31, 2023 related to these assets.