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Business Purpose Loans - Classifications and Carrying Values of Business Purpose Residential Loans (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2022 | Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Real estate amount, amount with original maturity of thirty years (as a percent) | 2.00% |
LIBOR |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Real estate owned, rate (as a percent) | 39.00% |
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Real estate owned, rate (as a percent) | 48.00% |
Fixed Rate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Real estate owned, rate (as a percent) | 13.00% |
Commitment To Fund Residential Bridge Loan |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Commitment to fund loan | $ 990,000 |
Bridge Loans | Minimum |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Residential bridge loans held-for-investment, original maturities (in months) | 6 months |
Bridge Loans | Maximum |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Residential bridge loans held-for-investment, original maturities (in months) | 36 months |
Held-for-sale at fair value, Total |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | $ 337,238 | $ 358,309
Held-for-investment at fair value, Total |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 4,919,980 | 4,432,680
Business Purpose Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 5,257,218 | 4,790,989
Redwood | Single-family rental loans, held-for-sale |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 281,105 | 358,309
Redwood | Single Family Rental Loans Held For Investment At Fair Value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 0 | 0
Redwood | Single family rental loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 281,105 | 358,309
Redwood | Residential Bridge, Held-for-sale at fair value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 56,133 | 0
Redwood | Bridge loans held-for-investment |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 1,388,750 | 666,364
Redwood | Residential bridge loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 1,444,883 | 666,364
CAFL | Single-family rental loans, held-for-sale |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 0 | 0
CAFL | Single Family Rental Loans Held For Investment At Fair Value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 3,018,994 | 3,488,074
CAFL | Single family rental loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 3,018,994 | 3,488,074
CAFL | Bridge Loans, Held-For-Sale At Fair Value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 0 | 0
CAFL | Bridge Loans Held For Investment At Fair Value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 512,236 | 278,242
CAFL | Bridge Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | $ 512,236 | $ 278,242

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