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Business Purpose Residential Loans - Classifications and Carrying Values of Business Purpose Residential Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Single-family rental loans, held-for-sale
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential loans	$ 332,000	$ 28,000
Residential Bridge, Held-for-sale at fair value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential loans	0	0
Residential bridge loans held-for-investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential loans	745,006	112,798
Residential bridge loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential loans	745,006	112,798
Held-for-sale at fair value, Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential loans	331,565	28,460
Held-for-investment at fair value, Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential loans	3,175,178	112,798
Business purpose residential loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential loans	3,506,743	141,258
Redwood | Single-family rental loans, held-for-sale
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential loans	331,565	28,460
Redwood | Single-family rental loans held-for-investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential loans	237,620	0
Redwood | Single-family rental loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential loans	569,185	28,460
CoreVest LLC | Single-family rental loans, held-for-sale
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential loans	0	0
CoreVest LLC | Single-family rental loans held-for-investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential loans	2,192,552	0
CoreVest LLC | Single-family rental loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential loans	$ 2,192,552	$ 0

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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