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Business Purpose Residential Loans (Details) |  |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | ---
Jun. 30, 2020 USD ($) loan | Dec. 31, 2019 USD ($) loan | Jun. 30, 2020 USD ($) loan | Jun. 30, 2019 USD ($) | Jun. 30, 2020 USD ($) loan | Jun. 30, 2019 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Proceeds from sales of held-for-sale loans |  |  |  |  | $ 3,126,860,000 | $ 2,123,794,000
Purchases of held-for-sale loans |  |  |  |  | $ 2,720,245,000 | 2,534,886,000
Number of loans transferred | loan |  |  |  |  | 3 |
Transfer to REO |  |  |  |  | $ 9,645,000 | 5,098,000
Commitment To Fund Residential Bridge Loan |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Commitment to fund loan | $ 167,000,000 |  | $ 167,000,000 |  | 167,000,000 |
Single-Family Rental, Held-for-sale at fair value |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Number of loans | loan | 199 | 308 |  |  |  |
Loan principal | $ 380,000,000 | $ 553,000,000 | 380,000,000 |  | 380,000,000 |
Loans, at fair value |  | $ 569,000,000 |  |  |  |
Purchases of held-for-sale loans |  |  | 176,000,000 |  | 436,000,000 |
Gain (loss) on investments |  |  | $ 3,000,000 | $ 1,000,000 | $ (9,000,000) | 2,000,000
Weighted average coupon rate | 4.82% |  | 4.82% |  | 4.82% |
Contract maturities |  |  |  |  | 8 years |
Weighted average original loan-to-value (LTV) | 67.00% |  | 67.00% |  | 67.00% |
Weighted-average debt service coverage ratio |  |  |  |  | 1.35 |
Number of loans in foreclosure | loan | 3 | 1 | 3 |  | 3 |
Fair value of loans, in foreclosure | $ 3,000,000 | $ 100,000 | $ 3,000,000 |  | $ 3,000,000 |
Residential Bridge, Held-for-sale at fair value |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Loans, at fair value | $ 0 | $ 0 | 0 |  | 0 |
Residential Bridge, Held-for-investment at fair value |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Number of loans | loan | 2,847 | 2,653 |  |  |  |
Loan principal | $ 803,000,000 | $ 743,000,000 | 803,000,000 |  | 803,000,000 |
Loans, at fair value | $ 787,367,000 | 745,006,000 | 787,367,000 |  | 787,367,000 |
Purchases of held-for-sale loans |  |  | 54,000,000 |  | 260,000,000 |
Gain (loss) on investments |  |  | $ 22,000,000 | (300,000) | $ (17,000,000) | (600,000)
Weighted average coupon rate | 7.96% |  | 7.96% |  | 7.96% |
Weighted average original loan-to-value (LTV) | 69.00% |  | 69.00% |  | 69.00% |
Balance of loans 90 days or more delinquent | $ 30,000,000 | $ 12,000,000 | $ 30,000,000 |  | $ 30,000,000 |
Number of loans in foreclosure | loan | 9 | 31 | 9 |  | 9 |
Fair value of loans, in foreclosure | $ 35,000,000 | $ 14,000,000 | $ 35,000,000 |  | $ 35,000,000 |
Transfer to REO |  |  |  |  | $ 2,000,000 |
Weighted average original FICO score | 720 |  | 720 |  | 720 |
Residential Bridge, Held-for-investment at fair value | Minimum |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Contract maturities |  |  |  |  | 6 months |
Residential Bridge, Held-for-investment at fair value | Maximum |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Contract maturities |  |  |  |  | 24 months |
Residential bridge loans |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Proceeds from loan originations to third parties |  |  | $ 2,000,000 |  |  |
Loans, at fair value | $ 787,367,000 | 745,006,000 | 787,367,000 |  | $ 787,367,000 |
Held-for-sale at fair value, Total |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Loans, at fair value | 379,795,000 | 331,565,000 | 379,795,000 |  | 379,795,000 |
Held-for-investment at fair value, Total |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Loans, at fair value | 3,402,405,000 | 3,175,178,000 | 3,402,405,000 |  | 3,402,405,000 |
Business purpose residential loans |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Proceeds from loan originations |  |  | 234,000,000 |  |  |
Market valuations gains (losses), net |  |  | (3,000,000) |  |  |
Fee income |  |  | 2,000,000 |  | 11,000,000 |
Loans, at fair value | $ 3,782,200,000 | $ 3,506,743,000 | 3,782,200,000 |  | 3,782,200,000 |
Business Purpose Mortgage Banking Activities |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Market valuations gains (losses), net |  |  | (1,260,000) | $ 1,012,000 | (5,194,000) | $ 1,098,000
Business Purpose Mortgage Banking Activities | Single-Family Rental, Held-for-sale at fair value |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Gain (loss) on investments |  |  | 1,000,000 |  | 12,000,000 |
Business Purpose Investment Fair Value Change | Single-Family Rental, Held-for-sale at fair value |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Gain (loss) on investments |  |  | $ 2,000,000 |  | $ 21,000,000 |
Financing Receivables, Equal to Greater than 90 Days Past Due | Single-Family Rental, Held-for-sale at fair value |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Number of loans past due | loan | 2 | 2 | 2 |  | 2 |
Aggregate unpaid principal balance | $ 2,000,000 | $ 2,000,000 | $ 2,000,000 |  | $ 2,000,000 |
Financing Receivables, Equal to Greater than 90 Days Past Due | Residential Bridge, Held-for-investment at fair value |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Number of loans past due | loan | 13 | 15 | 13 |  | 13 |
Aggregate unpaid principal balance | $ 32,000,000 | $ 9,000,000 | $ 32,000,000 |  | $ 32,000,000 |
Balance of loans 90 days or more delinquent | 28,000,000 | 7,000,000 | 28,000,000 |  | 28,000,000 |
Redwood | Single-Family Rental, Held-for-sale at fair value |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Loans, at fair value | 379,795,000 | 331,565,000 | 379,795,000 |  | 379,795,000 |
Redwood | Single-family rental loans held-for-investment |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Loans, at fair value | 0 | 237,620,000 | 0 |  | 0 |
Redwood | Single family rental loans |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Loans, at fair value | 379,795,000 | 569,185,000 | 379,795,000 |  | 379,795,000 |
CoreVest | Single-Family Rental, Held-for-sale at fair value |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Loans, at fair value | 0 | 0 | 0 |  | 0 |
CoreVest | Single-family rental loans held-for-investment |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Loans, at fair value | 2,615,038,000 | 2,192,552,000 | 2,615,038,000 |  | 2,615,038,000 |
CoreVest | Single family rental loans |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Loans, at fair value | $ 2,615,038,000 | $ 2,192,552,000 | $ 2,615,038,000 |  | 2,615,038,000 |
CAFL | Single-Family Rental, Held-for-sale at fair value |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Proceeds from sales of held-for-sale loans |  |  |  |  | 26,000,000 |
Purchases of held-for-sale loans |  |  |  |  | $ 599,000,000 |
Number of securitization entities to which asset transferred (in entities) | loan | 2 |  | 2 |  | 2 |
CAFL | Single-family rental loans held-for-investment |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Number of loans | loan | 967 | 783 |  |  |  |
Loan principal | $ 2,580,000,000 | $ 2,080,000,000.00 | $ 2,580,000,000 |  | $ 2,580,000,000 |
Loans, at fair value | $ 2,620,000,000 | $ 2,190,000,000 | 2,620,000,000 |  | 2,620,000,000 |
Gain (loss) on investments |  |  | $ 169,000,000 |  | $ (103,000,000) |
Weighted average coupon rate | 5.52% |  | 5.52% |  | 5.52% |
Contract maturities |  |  |  |  | 6 years |
Weighted average original loan-to-value (LTV) | 69.00% |  | 69.00% |  | 69.00% |
Weighted-average debt service coverage ratio |  |  |  |  | 1.37 |
Number of loans in foreclosure | loan | 8 | 5 | 8 |  | 8 |
Fair value of loans, in foreclosure | $ 14,000,000 | $ 9,000,000 | $ 14,000,000 |  | $ 14,000,000 |
Loans maturity one |  |  |  |  | 5 years |
Loans maturity two |  |  |  |  | 7 years |
Loans maturity three |  |  |  |  | 10 years |
CAFL | Single family rental loans |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Proceeds from sales of held-for-sale loans |  |  | $ 0 |  |  |
CAFL | Financing Receivables, Equal to Greater than 90 Days Past Due | Single-family rental loans held-for-investment |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Number of loans past due | loan | 19 | 18 | 19 |  | 19 |
Aggregate unpaid principal balance | $ 29,000,000 | $ 29,000,000 | $ 29,000,000 |  | $ 29,000,000 |

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