Fair Value Measurements - Summary of Fair Value of Assets and Liabilities Measured on Recurring Basis (Detail) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets:
US Government Agency securities	$ 12,849	$ 12,985
US Government Treasury securities	4,944	4,942
Obligations of state and political subdivisions	45,967	47,045
Mortgage backed securities in government-sponsored entities	67,960	48,181
Other securities	2,229	2,337
Total	133,949	115,490
Derivative	2,051	716
Fair Value, Inputs, Level 1 [Member]
Assets:
US Government Agency securities	0	0
US Government Treasury securities	0	0
Obligations of state and political subdivisions	0	0
Mortgage backed securities in government-sponsored entities	0	0
Other securities	0	0
Total	0	0
Derivative	0	0
Fair Value, Inputs, Level 2 [Member]
Assets:
US Government Agency securities	12,849	12,985
US Government Treasury securities	4,944	4,942
Obligations of state and political subdivisions	45,967	47,045
Mortgage backed securities in government-sponsored entities	67,960	48,181
Other securities	2,229	2,337
Total	133,949	115,490
Derivative	0	0
Fair Value, Inputs, Level 3 [Member]
Assets:
US Government Agency securities	0	0
US Government Treasury securities	0	0
Obligations of state and political subdivisions	0	0
Mortgage backed securities in government-sponsored entities	0	0
Other securities	0	0
Total	0	0
Derivative	$ 2,051	$ 716