Regulatory Capital Requirements - Schedule of Bank Actual and Required Capital Amounts and Ratios (Detail) $ in Thousands	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Total capital
Actual	$ 267,538	$ 251,042
For capital adequacy purposes	192,917	188,807
To be well capitalized	241,146	236,009
Tier 1 capital
Actual	248,410	234,533
For capital adequacy purposes	144,688	141,605
To be well capitalized	192,917	188,807
Common equity
Actual	248,410	234,533
For capital adequacy purposes	108,516	106,204
To be well capitalized	156,745	153,406
Tier 1 capital
Actual	248,410	234,533
For capital adequacy purposes	108,337	66,526
To be well capitalized	$ 135,421	$ 83,158
Ratios
Actual	0.1109	0.1062
For capital adequacy purposes	0.08	0.08
To be well capitalized	0.10	0.10
Actual	0.103	0.0992
For capital adequacy purposes	0.06	0.06
To be well capitalized	0.08	0.08
Actual	0.103	0.0992
For capital adequacy purposes	0.045	0.045
To be well capitalized	0.065	0.065
Banking Regulation, Leverage Ratio [Abstract]
Actual	0.0917	0.141
For capital adequacy purposes	0.04	0.04
To be well capitalized	0.05	0.05