Investment Securities - Summary of Fair Value of Available For Sale Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Debt Securities Available For Sale Unrealized Loss Position Fair Value [Line Items]
Less than 12 Months Fair Value	$ 23,065	$ 8,698
Less than 12 Months Unrealized Losses	(290)	(117)
More than 12 Months Fair Value	68,968	67,335
More than 12 Months Unrealized Losses	(11,858)	(10,099)
Fair Value	92,033	76,033
Unrealized Losses	(12,148)	(10,216)
Mortgage-backed securities - U.S. Government Sponsored Enterprises (GSEs) [Member]
Debt Securities Available For Sale Unrealized Loss Position Fair Value [Line Items]
Less than 12 Months Fair Value	14,751	2,858
Less than 12 Months Unrealized Losses	(164)	(14)
More than 12 Months Fair Value	29,187	31,398
More than 12 Months Unrealized Losses	(6,488)	(5,970)
Fair Value	43,938	34,256
Unrealized Losses	(6,652)	(5,984)
U.S. government agency securities [Member]
Debt Securities Available For Sale Unrealized Loss Position Fair Value [Line Items]
Less than 12 Months Fair Value	4,945	0
Less than 12 Months Unrealized Losses	(55)	0
More than 12 Months Fair Value	5,185	5,291
More than 12 Months Unrealized Losses	(1,075)	(969)
Fair Value	10,130	5,291
Unrealized Losses	(1,130)	(969)
Obligations of state and political subdivisions [Member]
Debt Securities Available For Sale Unrealized Loss Position Fair Value [Line Items]
Less than 12 Months Fair Value	3,369	5,117
Less than 12 Months Unrealized Losses	(71)	(102)
More than 12 Months Fair Value	34,019	30,646
More than 12 Months Unrealized Losses	(4,294)	(3,160)
Fair Value	37,388	35,763
Unrealized Losses	(4,365)	(3,262)
Small business association (SBA) securities [Member]
Debt Securities Available For Sale Unrealized Loss Position Fair Value [Line Items]
Less than 12 Months Fair Value	0	723
Less than 12 Months Unrealized Losses	0	(1)
More than 12 Months Fair Value	577	0
More than 12 Months Unrealized Losses	(1)	0
Fair Value	577	723
Unrealized Losses	$ (1)	$ (1)