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Securitized Debt and Securitized Debt at Fair Value - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2023 Securities
Securitization Financial Asset For Which Transfer Is Accounted As Sale [Line Items]
Number of securitizations	23
Minimum
Securitization Financial Asset For Which Transfer Is Accounted As Sale [Line Items]
Securities redemption when principal balance is less than a certain percentage	10.00%
Maturity dates of the securities	2046-04
Maximum
Securitization Financial Asset For Which Transfer Is Accounted As Sale [Line Items]
Securities redemption when principal balance is less than a certain percentage	30.00%
Maturity dates of the securities	2053-07

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 860
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481326/860-20-50-3

+ Details

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- Definition

Maturity dates of the securities.

+ References

No definition available.

+ Details

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- Definition

Number of active securitizations.

+ References

No definition available.

+ Details

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- Definition

Redemption of securities at time of principal balance met certain range, percentage

+ References

No definition available.

+ Details

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