Loans Held for Investment - Key Characteristics of Residential Loan Portfolio (Details) - Seasoned Subprime Residential Mortgage Loans - Loans held for investment $ in Thousands	3 Months Ended	12 Months Ended
Jun. 30, 2026 USD ($) loan	Dec. 31, 2025 USD ($) loan
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]
Number of loans \| loan	76,177	93,956
Weighted average maturity (years)	19 years 10 months 24 days	20 years 3 months 18 days
Weighted average loan to value	77.10%	77.80%
Weighted average FICO	668	666
Weighted average loan balance (in thousands) \| $	$ 107	$ 106
Weighted average percentage owner-occupied	84.80%	85.50%
Weighted average percentage single family residence	77.00%	77.50%
CA
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]
Weighted average geographic concentration of top five states	15.10%	15.20%
FL
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
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]
Weighted average geographic concentration of top five states	9.00%	8.70%
PA
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]
Weighted average geographic concentration of top five states	4.40%	4.30%
NJ
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]
Weighted average geographic concentration of top five states	4.40%	4.30%

Indicates the number of mortgages under each classification.

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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.

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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.

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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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- Details

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