Regulatory Capital Requirements - Schedule Of Compliance With Regulatory Capital Requirements Under Banking Regulations (Detail) $ in Thousands	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Parent Company [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 Capital (to Average Assets), Actual, Amount	$ 166,082	$ 143,148
Tier 1 Capital (to Average Assets), Actual, Ratio	0.0798	0.0723
Tier 1 Capital (to Average Assets), Actual, Amount	$ 166,082	$ 143,148
Tier 1 Capital (to Average Assets), Actual, Ratio	0.0823	0.0862
Tier 1 Capital (to Risk-Weighted Assets), Actual, Amount	$ 166,082	$ 143,148
Tier 1 Capital (to Risk-Weighted Assets), Actual, Ratio	0.0823	0.0862
Tier 1 Capital (to Risk-Weighted Assets), Actual, Amount	$ 237,669	$ 211,637
Tier 1 Capital (to Risk-Weighted Assets), Actual, Ratio	0.1177	0.1275
Tier I Capital (to Average Assets ), For Capital Adequacy Purposes, Amount	$ 83,229	$ 79,204
Tier I Capital (to Average Assets ), For Capital Adequacy Purposes, Amount	90,836	74,695
Tier I Capital (to Average Assets ), For Capital Adequacy Purposes, Amount	121,114	99,594
Total Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Amount	161,485	132,792
Tier I Capital (to Average Assets),Required to be Well Capitalized ,amount	104,036	99,005
Tier I Capital (to Average Assets),Required to be Well Capitalized ,amount	131,207	107,893
Tier I Capital (to Average Assets),Required to be Well Capitalized ,amount	161,485	132,792
Total Capital (to Risk-Weighted Assets), Required To Be Well Capitalized, Amount	$ 201,857	$ 165,990
Parent Company [Member] \| Minimum [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier I Capital (to Average Assets ), For Capital Adequacy Purposes, Ratio	0.04	0.04
Tier I Capital (to Average Assets ), For Capital Adequacy Purposes, Ratio	4.50%	4.50%
Tier I Capital (to Average Assets ), For Capital Adequacy Purposes, Ratio	0.06	0.06
Total Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Ratio	0.08	0.08
Tier I Capital (to Average Assets),Required to be Well Capitalized ,Ratio	0.05	0.05
Tier I Capital (to Average Assets),Required to be Well Capitalized ,Ratio	6.50%	6.50%
Tier I Capital (to Average Assets),Required to be Well Capitalized ,Ratio	0.08	0.08
Total Capital (to Risk-Weighted Assets), Required To Be Well Capitalized, Ratio	0.10	0.10
Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 Capital (to Average Assets), Actual, Amount	$ 213,670	$ 188,635
Tier 1 Capital (to Average Assets), Actual, Ratio	0.1023	0.0951
Tier 1 Capital (to Average Assets), Actual, Amount	$ 213,670	$ 188,635
Tier 1 Capital (to Average Assets), Actual, Ratio	0.1054	0.1138
Tier 1 Capital (to Risk-Weighted Assets), Actual, Amount	$ 213,670	$ 188,635
Tier 1 Capital (to Risk-Weighted Assets), Actual, Ratio	0.1054	0.1138
Tier 1 Capital (to Risk-Weighted Assets), Actual, Amount	$ 231,105	$ 203,095
Tier 1 Capital (to Risk-Weighted Assets), Actual, Ratio	0.114	0.1225
Tier I Capital (to Average Assets ), For Capital Adequacy Purposes, Amount	$ 83,552	$ 79,373
Tier I Capital (to Average Assets ), For Capital Adequacy Purposes, Amount	91,190	74,616
Tier I Capital (to Average Assets ), For Capital Adequacy Purposes, Amount	121,586	99,489
Total Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Amount	162,115	132,652
Tier I Capital (to Average Assets),Required to be Well Capitalized ,amount	104,440	99,216
Tier I Capital (to Average Assets),Required to be Well Capitalized ,amount	131,718	107,779
Tier I Capital (to Average Assets),Required to be Well Capitalized ,amount	162,115	132,652
Total Capital (to Risk-Weighted Assets), Required To Be Well Capitalized, Amount	$ 202,643	$ 165,814
Bank [Member] \| Minimum [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier I Capital (to Average Assets ), For Capital Adequacy Purposes, Ratio	0.04	0.04
Tier I Capital (to Average Assets ), For Capital Adequacy Purposes, Ratio	4.50%	4.50%
Tier I Capital (to Average Assets ), For Capital Adequacy Purposes, Ratio	0.06	0.06
Total Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Ratio	0.08	0.08
Tier I Capital (to Average Assets),Required to be Well Capitalized ,Ratio	0.05	0.05
Tier I Capital (to Average Assets),Required to be Well Capitalized ,Ratio	6.50%	6.50%
Tier I Capital (to Average Assets),Required to be Well Capitalized ,Ratio	0.08	0.08
Total Capital (to Risk-Weighted Assets), Required To Be Well Capitalized, Ratio	0.10	0.10

Common equity tier one capital ratio required for capital adequacy.

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Common equity tier one capital ratio required to be well capitalized.

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- Definition

Amount of net capital of broker-dealer.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher SEC
-Name Rule 15c3-1
-Number 240
-Section 15c3-1

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Amount of minimum total risk-based capital required for capital adequacy as defined by regulatory framework.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826

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Ratio of minimum total risk-based capital to risk-weighted assets required for capital adequacy as defined by regulatory framework.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Topic 942
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Amount of Common Equity Tier 1 risk-based capital as defined by regulatory framework.

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Amount of Tier 1 leverage capital as defined by regulatory framework.

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