Loans Held for Investment - Key Characteristics of Residential Loan Portfolio (Details) - Seasoned Subprime Residential Mortgage Loans $ in Thousands	Sep. 30, 2024 USD ($) loan	Dec. 31, 2023 USD ($) loan
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]
Underlying mortgages excluded from portfolio		$ 152,000
Loans held for investment, at fair value
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]
Number of loans \| loan	106,144	112,572
Weighted average maturity (years)	20 years 9 months 18 days	21 years
Weighted average loan to value	78.40%	79.00%
Weighted average FICO	666	665
Weighted average loan balance (in thousands)	$ 108	$ 106
Weighted average percentage owner-occupied	85.60%	86.00%
Weighted average percentage single family residence	77.50%	78.40%
CA \| Loans held for investment, at fair value
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]
Weighted average geographic concentration of top five states	15.00%	14.70%
FL \| Loans held for investment, at fair value
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]
Weighted average geographic concentration of top five states	8.80%	8.80%
NY \| Loans held for investment, at fair value
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]
Weighted average geographic concentration of top five states	8.70%	8.60%
PA \| Loans held for investment, at fair value
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]
Weighted average geographic concentration of top five states	4.40%	4.50%
NJ \| Loans held for investment, at fair value
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]
Weighted average geographic concentration of top five states	4.30%
VA \| Loans held for investment, at fair value
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]
Weighted average geographic concentration of top five states		4.30%

Indicates the number of mortgages under each classification.

No definition available.

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- Definition

Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]

+ References

No definition available.

+ Details

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- Definition

The weighted average maturity period of underlying mortgages, which is based on their current face amounts.

+ References

No definition available.

+ Details

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- Definition

As of the balance sheet date, the weighted average of underlying mortgages at amortized cost to their fair values determined using defined pricing methodologies.

+ References

No definition available.

+ Details

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- Definition

As of the balance sheet date, the weighted average credit score of underlying mortgages based on their FICO ratings.

+ References

No definition available.

+ Details

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- Definition

As of the balance sheet date, the percentage of unpaid principal amount of underlying mortgages originated in a specified territory.

+ References

No definition available.

+ Details

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- Definition

As of the balance sheet date, the weighted average of unpaid principal amounts of underlying mortgages.

+ References

No definition available.

+ Details

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- Definition

As of the balance sheet date, the weighted average of underlying mortgages that are owner occupied.

+ References

No definition available.

+ Details

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- Definition

As of the balance sheet date, the weighted average of underlying mortgages that are single family residences.

+ References

No definition available.

+ Details

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- Definition

Amount of undisbursed portion of financing receivable balance. Excludes financing receivable covered under loss sharing agreement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-3

+ Details

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- Details

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