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Business Purpose Loans - Classifications and Carrying Values of Business Purpose Residential Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Held-for-sale at fair value, Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	$ 364,073	$ 358,309
Held-for-investment at fair value, Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	4,968,513	4,432,680
Business Purpose Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	5,332,586	4,790,989
Redwood | Held-for-sale at fair value, Total | BPL Term Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	358,791	358,309
Redwood | Held-for-sale at fair value, Total | BPL Bridge Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	5,282	0
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
Redwood | Held-for-investment at fair value, Total | BPL Bridge Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	1,507,146	666,364
Redwood | Business Purpose Loans | BPL Term Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	358,791	358,309
Redwood | Business Purpose Loans | BPL Bridge Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	1,512,428	666,364
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	2,944,984	3,488,074
CAFL | Held-for-investment at fair value, Total | BPL Bridge Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	516,383	278,242
CAFL | Business Purpose Loans | BPL Term Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	2,944,984	3,488,074
CAFL | Business Purpose Loans | BPL Bridge Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	$ 516,383	$ 278,242

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No definition available.

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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

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