Regulatory Matters - Schedule of Bank's Actual and Required Capital Amounts and Ratios (Details)	Mar. 31, 2026 USD ($)	Dec. 31, 2025 USD ($)
Regulatory Capital Requirement [Abstract]
Common equity Tier 1 capital to risk-weighted assets, actual, amount	$ 24,427	$ 23,914
Common equity Tier 1 capital to risk-weighted assets, actual, ratio	0.1887	0.1991
Common equity Tier 1 capital to risk-weighted assets, minimum capital requirement, amount	$ 5,824	$ 5,405
Common equity Tier 1 capital to risk-weighted assets, minimum capital requirement, ratio	0.045	0.045
Common equity Tier 1 capital to risk-weighted assets, minimum to be well capitalized, amount	$ 8,412	$ 7,808
Common equity Tier 1 capital to risk-weighted assets, minimum to be well capitalized, ratio	0.065	0.065
Tier 1 capital to risk-weighted assets, actual, amount	$ 24,427	$ 23,914
Tier 1 capital to risk-weighted assets, actual, ratio	0.1887	0.1991
Tier 1 capital to risk-weighted assets, minimum capital requirement, amount	$ 7,765	$ 7,207
Tier 1 capital to risk-weighted assets, minimum capital requirement, ratio	0.06	0.06
Tier 1 capital to risk-weighted assets, minimum to be well capitalized, amount	$ 10,353	$ 9,609
Tier 1 capital to risk-weighted assets, minimum to be well capitalized, ratio	0.08	0.08
Total capital to risk-weighted assets, actual, amount	$ 25,595	$ 24,888
Total capital to risk-weighted assets, actual, ratio	0.1978	0.2072
Total capital to risk-weighted assets, minimum capital requirement, amount	$ 10,353	$ 9,609
Total capital to risk-weighted assets, minimum capital requirement, Ratio	0.08	0.08
Total capital to risk-weighted assets, minimum to be well capitalized, amount	$ 12,942	$ 12,012
Total capital to risk-weighted assets, minimum to be well capitalized, ratio	0.10	0.10
Tier 1 leverage to adjusted average assets, amount	$ 24,427	$ 23,914
Tier 1 leverage to adjusted average assets, ratio	0.0976	0.1063
Tier 1 leverage, minimum capital requirement, amount	$ 10,011	$ 8,996
Tier 1 leverage to adjusted average assets, minimum capital requirement, ratio	0.04	0.04
Tier 1 leverage to adjusted average assets, minimum to be well capitalized, amount	$ 12,514	$ 11,246
Tier 1 leverage to adjusted average assets, minimum to be well capitalized, ratio	0.05	0.05

Regulatory capital requirements.

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Ratio of minimum Common Equity Tier 1 risk-based capital to risk-weighted assets required for capital adequacy as defined by regulatory framework.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477270/942-505-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477270/942-505-50-1B

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