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Residential Consumer Loans - Schedule of Characteristics of Residential Consumer Loans Held-for-Investment (Details) - Held-for-investment at fair value - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Sequoia
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Unpaid principal balance	$ 7,639,727	$ 5,398,913
Average loan balance (UPB)	835	757
Fair value of loans	$ 6,950,586	$ 4,780,203
Weighted average coupon	4.98%	4.15%
Unpaid principal balance of loans in foreclosure	$ 7,572	$ 5,234
Average foreclosure balance (UPB)	527	436
Freddie Mac SLST
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Unpaid principal balance	1,569,864	1,614,974
Average loan balance (UPB)	156	157
Fair value of loans	$ 1,297,022	$ 1,359,242
Weighted average coupon	4.50%	4.50%
Unpaid principal balance of loans in foreclosure	$ 42,231	$ 47,654
Average foreclosure balance (UPB)	164	163
Financing Receivables, Equal to Greater than 90 Days Past Due | Sequoia
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Unpaid principal balance of loans with 90+ day delinquencies	15,653	13,023
Average 90+ days delinquent balance (UPB)	460	482
Financing Receivables, Equal to Greater than 90 Days Past Due | Freddie Mac SLST
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Unpaid principal balance of loans with 90+ day delinquencies	111,958	132,307
Average 90+ days delinquent balance (UPB)	$ 174	$ 166

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Fair Value, Option, Loans Held As Assets, Aggregate Amount In Foreclosure

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Loans Held-for-Investment, Average Loan Balance (UPB)

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Loans Held-for-Investment, Weighted Average Coupon Rate

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 948
-SubTopic 310
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479628/948-310-S99-1

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This item represents the aggregate fair value of loans held as assets that are 90 days or more past due for which the fair value option has been elected.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (e)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-28

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For loans held as assets for which the fair value option has been elected, this item represents the difference between the aggregate fair value and the aggregate unpaid principal balance of those loans that are 90 days or more past due.

+ References

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-SubTopic 10
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Amortized cost, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
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-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

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-Paragraph 1
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This is the sum of principal amount outstanding for both securitized and unsecuritized loans of all types.

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