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Residential Investor Loans - Schedule of Classifications and Carrying Values of Residential Investor Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Residential Investor Bridge, Unsecuritized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	$ 101,000
Held-for-sale at fair value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	783,271	$ 237,224
Held-for-sale at fair value | Residential Investor Term, Unsecuritized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	157,339	158,637
Held-for-sale at fair value | Residential Investor Term, Securitized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	0	0
Held-for-sale at fair value | Residential Investor Bridge, Unsecuritized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	625,932	78,587
Held-for-sale at fair value | Residential Investor Bridge, Securitized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	0	0
Held-for-investment at fair value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	3,074,326	4,349,866
Held-for-investment at fair value | Residential Investor Term, Unsecuritized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	0	0
Held-for-investment at fair value | Residential Investor Term, Securitized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	2,143,226	2,485,069
Held-for-investment at fair value | Residential Investor Bridge, Unsecuritized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	0	1,041,694
Held-for-investment at fair value | Residential Investor Bridge, Securitized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	931,100	823,103
Total Residential Investor Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	3,857,597	4,587,090
Total Residential Investor Loans | Residential Investor Term, Unsecuritized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	157,339	158,637
Total Residential Investor Loans | Residential Investor Term, Securitized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	2,143,226	2,485,069
Total Residential Investor Loans | Residential Investor Bridge, Unsecuritized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	625,932	1,120,281
Total Residential Investor Loans | Residential Investor Bridge, Securitized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	$ 931,100	$ 823,103

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- 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/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481628/310-20-40-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

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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.

+ References

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

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-04(5)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479170/946-210-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-5

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(3))
-Publisher FASB
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