Investments in Qualified Affordable Housing Partnerships - Narrative (Details) - USD ($)	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Federal Home Loan Banks [Abstract]
Amortization method investments in qualified affordable housing projects	$ 88,800,000	$ 71,900,000
Cost method investments in qualified affordable housing projects	250,000	1,000,000
Net investment in qualified affordable housing projects	89,100,000	72,900,000
Total unfunded commitments related to investments in qualified affordable housing funds	32,070,000	15,400,000
Impairment losses related to LIHTC investments	$ 0	$ 0	$ 0

Amortization and Cost Method Qualified Affordable Housing Project Investments

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- Definition

Cost Method Qualified Affordable Housing Project Investments

+ References

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- Definition

Amount of write-down from impairment of an investment in a qualified affordable housing project.

+ References

Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 323
-SubTopic 740
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481543/323-740-50-2

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Amount of investment in qualified affordable housing projects.

+ References

Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 323
-SubTopic 740
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481543/323-740-50-2

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Amount of commitment or contingent commitments to qualified affordable housing project investments.

+ References

Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 323
-SubTopic 740
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481543/323-740-50-2

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