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Commitments and Contingencies - Additional Information (Details) $ in Thousands | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2018 partnership | Dec. 31, 2021 USD ($) lease loan repurchase_request | Dec. 31, 2020 USD ($) repurchase_request loan | Dec. 31, 2019 USD ($) loan | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Lessee, number of leases | lease |  |  | 7 |  |  |  |
Present value of remaining lease payments |  |  | $ 24,454 |  |  |  |
Operating lease expense |  |  | 4,000 | $ 4,000 | $ 3,000 |  |
Unamortized leasehold improvements |  |  | 3,000 |  |  |  |
Leasehold amortization expense |  |  | $ 500 | 500 | 400 |  |
Number of new leases | lease |  |  | 2 |  |  |  |
Lease liability |  |  | $ 20,960 | $ 16,687 |  |  |
Operating Lease, Liability, Statement of Financial Position [Extensible List] |  |  | Accounts Payable and Accrued Liabilities | Accounts Payable and Accrued Liabilities |  |  |
Operating lease right-of-use assets |  |  | $ 18,772 | $ 15,012 |  |  |
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] |  |  | Other assets | Other assets |  |  |
Weighted average remaining lease term |  |  | 6 years |  |  |  |
Discount rate (as a percent) |  |  | 5.10% |  |  |  |
Derivative liabilities | [1] |  | $ 3,317 | $ 16,072 |  |  |
Net market valuation adjustments |  |  | 321,433 | (541,399) | 97,006 |  |
Number of partnerships, committed to fund | partnership |  | 2 |  |  |  |  |
Risk share income |  |  | 2,815 | 4,367 | $ 3,522 |  |
Guarantee obligations |  |  | 7,459 | 10,039 |  |  |
Guarantee obligation, credit reserve |  |  | 5,000 |  |  |  |
SPE, assets |  |  | 34,000 | 46,000 |  |  |
SPE, liabilities |  |  | 7,000 | 10,000 |  |  |
Residential loan and MSR repurchase reserve |  |  | $ 9,306 | $ 8,631 |  |  |
Residential loans repurchase requests | repurchase_request |  |  | 4 | 10 |  |  |
Residential loans, number of loans repurchased | loan |  |  | 2 | 1 | 0 |  |
Residential loans repurchase provision (reversal) |  |  | $ 1,000 | $ (4,000) | $ 100 |  |
Residential loans repurchased during period |  |  | 200 | 100 | 0 |  |
Aggregate amount of loss contingency reserves |  |  | 2,000 |  |  |  |
Residential Loan Seller Demands |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Expenses from litigation recorded |  |  |  | 10,000 |  |  |
Aggregate amount of accrual |  |  | 500 |  |  |  |
Residential Loans |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Unpaid principal balance |  |  | 1,813,865 | 172,748 |  |  |
Loans, at fair value |  |  | 1,845,282 | 176,641 |  |  |
Financing Receivables, Equal to Greater than 90 Days Past Due | Residential Loans |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Loans, at fair value |  |  | 2,923 | 1,882 |  |  |
Mortgage Banking And Investment Activities |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Market valuation changes in fair value of guarantee asset |  |  | 100 | 1,000 | $ 200 |  |
Guarantee Obligations |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Original principal balance of loans sold subject to risk sharing agreement |  |  |  |  |  | $ 3,190,000 | $ 3,190,000
Potential future payments on risk sharing agreements |  |  | 44,000 |  |  |  |
Unpaid principal balance |  |  | $ 552,000 |  |  |  |
FICO credit score |  |  | 756 |  |  |  |
Loan to value ratio |  |  | 74.00% |  |  |  |
Guarantee Obligations | Residential Loans |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Loans held as assets amount in foreclosure |  |  | $ 200 |  |  |  |
Guarantee Obligations | Financing Receivables, Equal to Greater than 90 Days Past Due |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Loans, at fair value |  |  | 18,000 |  |  |  |
Commitment To Fund Residential Bridge Loan |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Commitments to fund temporary advances |  |  | 625,000 |  |  |  |
Derivative liabilities |  |  | 1,000 | 2,000 |  |  |
Net market valuation adjustments |  |  | 1,000 | $ (2,000) |  |  |
Commitments To Fund Point Options |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Commitments to fund temporary advances |  |  | $ 94,000 |  |  |  |
[1] | Our consolidated balance sheets include assets of consolidated variable interest entities (“VIEs”) that can only be used to settle obligations of these VIEs and liabilities of consolidated VIEs for which creditors do not have recourse to Redwood Trust, Inc. or its affiliates. At December 31, 2021 and 2020, assets of consolidated VIEs totaled $10,661,081 and $8,141,069, respectively. At December 31, 2021 and 2020, liabilities of consolidated VIEs totaled $9,619,347 and $7,148,414, respectively. See Note 4 for further discussion.

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