Investments in Qualified Affordable Housing Partnerships - Narrative (Details) - USD ($)	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Federal Home Loan Banks [Abstract]
Amortization method investments in qualified affordable housing projects	$ 84,000,000	$ 86,800,000
Cost method investments in qualified affordable housing projects	2,000,000	3,000,000
Net investment in qualified affordable housing projects	86,000,000	89,800,000
Total unfunded commitments related to investments in qualified affordable housing funds	17,229,000	18,100,000
Impairment losses related to LIHTC investments	$ 0	$ 0	$ 0

Amortization and Cost Method Qualified Affordable Housing Project Investments

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Cost Method Qualified Affordable Housing Project Investments

+ References

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 740
-Section 50
-Paragraph 2
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=116633289&loc=SL49122993-202985

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Amount of investment in qualified affordable housing projects.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 740
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=116633289&loc=SL49122993-202985

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 740
-Section 50
-Paragraph 2
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=116633289&loc=SL49122993-202985

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