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Business Purpose Loans - Schedule of Classifications and Carrying Values of Business Purpose Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Held-for-sale at fair value, Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	$ 180,250	$ 364,073
Held-for-investment at fair value, Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	5,040,048	4,968,513
Business Purpose Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	5,220,298	5,332,586
HEI at Redwood | Held-for-sale at fair value, Total | BPL Term Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	144,359	358,791
HEI at Redwood | Held-for-sale at fair value, Total | BPL Bridge Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	35,891	5,282
HEI at Redwood | Held-for-investment at fair value, Total | BPL Term Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	0	0
HEI at Redwood | Held-for-investment at fair value, Total | BPL Bridge Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	1,305,727	1,507,146
HEI at Redwood | Business Purpose Loans | BPL Term Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	144,359	358,791
HEI at Redwood | Business Purpose Loans | BPL Bridge Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	1,341,618	1,512,428
CAFL | Held-for-sale at fair value, Total | BPL Term Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	0	0
CAFL | Held-for-sale at fair value, Total | BPL Bridge Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	0	0
CAFL | Held-for-investment at fair value, Total | BPL Term Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	2,971,725	2,944,984
CAFL | Held-for-investment at fair value, Total | BPL Bridge Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	762,596	516,383
CAFL | Business Purpose Loans | BPL Term Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	2,971,725	2,944,984
CAFL | Business Purpose Loans | BPL Bridge Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	$ 762,596	$ 516,383

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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/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//1943274/2147479617/946-210-S99-1

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

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

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