Regulatory Capital Requirements - Schedule of Bank Actual and Required Capital Amounts and Ratios (Detail) $ in Thousands	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Total capital
Actual	$ 282,736	$ 251,042
For capital adequacy purposes	195,914	188,807
To be well capitalized	244,892	236,009
Tier 1 capital
Actual	263,058	234,533
For capital adequacy purposes	146,935	141,605
To be well capitalized	195,914	188,807
Common equity
Actual	263,058	234,533
For capital adequacy purposes	110,201	106,204
To be well capitalized	159,180	153,406
Tier 1 capital
Actual	263,058	234,533
For capital adequacy purposes	110,867	66,412
To be well capitalized	$ 138,584	$ 83,016
Ratios
Actual	0.1155	0.1062
For capital adequacy purposes	0.08	0.08
To be well capitalized	0.10	0.10
Actual	0.1074	0.0992
For capital adequacy purposes	0.06	0.06
To be well capitalized	0.08	0.08
Actual	0.1074	0.0992
For capital adequacy purposes	0.045	0.045
To be well capitalized	0.065	0.065
Banking Regulation, Leverage Ratio [Abstract]
Actual	0.0949	0.1413
For capital adequacy purposes	0.04	0.04
To be well capitalized	0.05	0.05