Securities, Additional Disclosure (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Debt Securities Available-for-Sale [Abstract]
Securities pledged as collateral	$ 70.9	$ 89.0
Accrued interest receivable on securities	$ 1.0	$ 1.4
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Accrued interest receivable	Accrued interest receivable
Securities of any one issuer, other than U.S. Government, exceeding 10% of stockholders' equity	$ 0.0	$ 0.0
Securities Sold under Agreements to Repurchase [Member]
Debt Securities Available-for-Sale [Abstract]
Securities pledged as collateral	70.9	89.0
Bank Term Funding Program [Member]
Debt Securities Available-for-Sale [Abstract]
Securities pledged as collateral	94.0	98.3
U.S. Treasuries [Member] \| Securities Sold under Agreements to Repurchase [Member]
Debt Securities Available-for-Sale [Abstract]
Securities pledged as collateral	30.1	47.8
Federal Agency Mortgage-backed Securities [Member] \| Securities Sold under Agreements to Repurchase [Member]
Debt Securities Available-for-Sale [Abstract]
Securities pledged as collateral	10.3	11.0
Federal Agency Debt Securities [Member] \| Securities Sold under Agreements to Repurchase [Member]
Debt Securities Available-for-Sale [Abstract]
Securities pledged as collateral	$ 30.5	$ 30.2

Represents risk arising from securities held by individual issuers in an amount exceeding 10% of stockholders' equity. Excludes U.S. Government and its agencies.

No definition available.

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- References

No definition available.

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- Definition

Amount, after allowance for credit loss, of accrued interest on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 3A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479106/326-30-50-3A

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479106/326-30-50-3B

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- Definition

Indicates line item in statement of financial position that includes accrued interest, after allowance for credit loss, on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 3A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479106/326-30-50-3A

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- Definition

The aggregate fair value as of the balance sheet date of financial instruments and other positions owned by the entity including: (1) mortgages, mortgage-backed and asset backed securities; (2) US government and agency obligations; (3) state and municipal government obligations; (4) other sovereign government debt; (5) corporate obligations; (6) corporate equities; (7) principal investments; (8) derivative contracts; and (9) physical commodities. Includes both pledged and unpledged holdings.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 940
-SubTopic 320
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479035/940-320-45-2

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