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Capital and Liquidity Requirements (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Compliance with Regulatory Capital Requirements under Banking Regulations
Percentage of Freddie Mac's liquidity requirement of outstanding principal of TAH loans serviced	8.00%	8.00%
Other Assets
Compliance with Regulatory Capital Requirements under Banking Regulations
Outstanding borrower advances	$ 1.2	$ 1.3
Seller/Servicer Agreements
Compliance with Regulatory Capital Requirements under Banking Regulations
Amount of capital in excess of aggregate regulatory requirements	$ 444.5	$ 433.4

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- Definition

Outstanding borrower advances to investors.

+ References

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- Definition

Percentage of liquidity requirement of outstanding principal of targeted affordable housing loans serviced.

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- Definition

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

+ References

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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