Fair Value, Option, Loans Held As Assets, Aggregate Amount In Foreclosure

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- Definition

The weighted average FICO score for borrowers at the time loans were originated.

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Financing Receivable, Loan To Value Ratio

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- Definition

Financing Receivable, Number Of Loans In Foreclosure

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- Definition

Financing Receivable, Number Of Loans Past Due

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- Definition

Financing Receivables, Weighted Average Interest Rate

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- Definition

Loans Receivable, Percentage Bearing Fixed Interest, Percentage Rate

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No definition available.

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- Definition

Percentage Of Loan Portfolio

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No definition available.

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- Definition

Principal Balance of Loans Acquired During Period

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No definition available.

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- Definition

Principal Balance of Loans Sold During Period

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Number of mortgage loans within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Footnote 3
-Subsection 29

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-Section S99
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- Definition

For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

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-SubTopic 10
-Section 50
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- Definition

This item represents the aggregate fair value of loans held as assets that are 90 days or more past due for which the fair value option has been elected.

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- Definition

Amount of the collateral pledged in support of federal home loan bank advances outstanding.

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- Definition

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.

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- Definition

Carrying amount as of the balance sheet date of loans that have been pledged as collateral for borrowings. If the secured party has the right by contract or custom to sell or re-pledge the collateral, then the debtor reclassifies that asset and report that asset in its statement of financial position separately from other assets not so encumbered.

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- Definition

Amount of increase (decrease) in investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

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- Definition

This is the sum of principal amount outstanding for both securitized and unsecuritized loans of all types.

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- Definition

Amortized amount of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

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- Definition

Value of loans held-for-sale transferred to loans held in the entity's portfolio in noncash transactions.

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- Definition

Value of loans and leases held in the entity's portfolio transferred to loans and leases held-for-sale in noncash transactions.

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Residential Loans - Additional Information (Details)	12 Months Ended
Residential Loans - Additional Information (Details)	Dec. 31, 2018 USD ($) loan	Dec. 31, 2017 USD ($) loan	Dec. 31, 2016 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans \| loan	1,486	2,013
Total Principal	$ 1,034,434,000	$ 1,409,179,000
Transfers from loans held-for-sale to loans held-for-investment	2,062,809,000	1,245,430,000	$ 1,063,860,000
Transfers from loans held-for-investment to loans held-for-sale	15,717,000	98,854,000	$ 359,005,000
Sequoia Choice
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans held as assets amount in foreclosure		0
Held-for sale residential loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan market valuation adjustment	7,254,742,000	5,115,210,000
Held-for sale residential loans \| Legacy Sequoia
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan market valuation adjustment	519,958,000	632,817,000
Held-for sale residential loans \| Sequoia Choice
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan market valuation adjustment	2,079,382,000	620,062,000
Held-for sale residential loans \| Freddie Mac SLST
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan market valuation adjustment	1,222,669,000	0
Redwood Trust Inc. \| Held-for sale residential loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan market valuation adjustment	3,432,733,000	$ 3,862,331,000
Redwood Trust Inc. \| Held-for sale residential loans \| Residential Real Estate \| FHLB Chicago
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Residential mortgage loans securing FHLB advances	$ 2,380,000,000
Redwood Trust Inc. \| Fixed rate residential mortgage
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Weighted average rate on loans	4.12%
Residential Loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans \| loan	1,484	2,009
Total Principal	$ 1,034,000,000	$ 1,410,000,000
Loan market valuation adjustment	$ 1,049,000,000	1,430,000,000
Number of loans in foreclosure \| loan	0
Principal value	$ 7,070,000,000	5,640,000,000
Principal balance of loans sold during period	7,110,000,000	4,210,000,000
Valuation adjustments	23,000,000	31,000,000
Loan pledged as collateral	935,000,000
Loans held as assets amount in foreclosure	1,000,000
Residential Loans \| Jumbo Loans \| Held-for sale residential loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan market valuation adjustment	1,048,690,000	1,427,052,000
Residential Loans \| Jumbo Loans \| Held-for sale residential loans \| Legacy Sequoia
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan market valuation adjustment	0	0
Residential Loans \| Jumbo Loans \| Held-for sale residential loans \| Sequoia Choice
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan market valuation adjustment	0	0
Residential Loans \| Jumbo Loans \| Held-for sale residential loans \| Freddie Mac SLST
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan market valuation adjustment	0	0
Residential Loans \| Redwood Trust Inc. \| Jumbo Loans \| Held-for sale residential loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan market valuation adjustment	$ 1,048,690,000	$ 1,427,052,000
Residential Loans \| Financing Receivables, Equal to Greater than 90 Days Past Due
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of loans past due \| loan	1
Loans held as assets, 90 days or more past due	$ 600,000
Residential loans, at lower of cost or fair value
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans \| loan	2	4
Total Principal	$ 100,000	$ 1,000,000
Loan market valuation adjustment	100,000	1,000,000
Loans held as assets, 90 days or more past due		$ 300,000
Number of loans in foreclosure \| loan		0
Residential loans, at lower of cost or fair value \| Held-for sale residential loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan market valuation adjustment	111,000	$ 893,000
Residential loans, at lower of cost or fair value \| Held-for sale residential loans \| Legacy Sequoia
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan market valuation adjustment	0	0
Residential loans, at lower of cost or fair value \| Held-for sale residential loans \| Sequoia Choice
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan market valuation adjustment	0	0
Residential loans, at lower of cost or fair value \| Held-for sale residential loans \| Freddie Mac SLST
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan market valuation adjustment	0	0
Residential loans, at lower of cost or fair value \| Redwood Trust Inc. \| Held-for sale residential loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan market valuation adjustment	$ 111,000	$ 893,000
Residential loans, at lower of cost or fair value \| Financing Receivables, Equal to Greater than 90 Days Past Due
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of loans past due \| loan	0	1
Residential Loans Held For Investment at Fair Value \| Legacy Sequoia
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans \| loan	2,641	3,178
Total Principal	$ 545,000,000	$ 698,000,000
Loan market valuation adjustment	520,000,000	633,000,000
Loans held as assets, 90 days or more past due	14,000,000	$ 25,000,000
FICO credit score		728
Loan to value ratio		66.00%
Loans held as assets amount in foreclosure	5,000,000	$ 10,000,000
Valuation adjustments		$ 23,000,000
Residential Loans Held For Investment at Fair Value \| Legacy Sequoia \| Legacy Sequoia
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Valuation adjustments	$ 37,000,000
Residential Loans Held For Investment at Fair Value \| Sequoia Choice
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans \| loan	2,800	806
Total Principal	$ 2,040,000,000	$ 605,000,000
Loan market valuation adjustment	$ 2,080,000,000	$ 620,000,000
Number of loans past due \| loan	3	0
Loans held as assets, 90 days or more past due	$ 1,905,000
Number of loans in foreclosure \| loan	0
FICO credit score		744
Loan to value ratio		75.00%
Valuation adjustments	$ (13,000,000)	$ (5,000,000)
Residential Loans Held For Investment at Fair Value \| Sequoia Choice \| Sequoia Choice
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Transfers from loans held-for-investment to loans held-for-sale	$ 1,780,000,000	$ 646,000,000
Residential Loans Held For Investment at Fair Value \| Freddie Mac SLST
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans \| loan	7,900	0
Total Principal	$ 1,310,000,000
Loan market valuation adjustment	$ 1,220,000,000
Number of loans past due \| loan	306
Loans held as assets, 90 days or more past due	$ 51,000,000
Number of loans in foreclosure \| loan	0
FICO credit score	598
Loan to value ratio	68.00%
Valuation adjustments	$ 21,000,000
Residential Loans Held For Investment at Fair Value \| Redwood
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Valuation adjustments		$ (5,000,000)
Transfers from loans held-for-sale to loans held-for-investment		600,000,000
Transfers from loans held-for-investment to loans held-for-sale	16,000,000	99,000,000
Residential Loans Held For Investment at Fair Value \| Jumbo Loans \| Held-for sale residential loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan market valuation adjustment	6,205,941,000	3,687,265,000
Residential Loans Held For Investment at Fair Value \| Jumbo Loans \| Held-for sale residential loans \| Legacy Sequoia
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan market valuation adjustment	519,958,000	632,817,000
Residential Loans Held For Investment at Fair Value \| Jumbo Loans \| Held-for sale residential loans \| Sequoia Choice
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan market valuation adjustment	2,079,382,000	620,062,000
Residential Loans Held For Investment at Fair Value \| Jumbo Loans \| Held-for sale residential loans \| Freddie Mac SLST
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan market valuation adjustment	$ 1,222,669,000	$ 0
Residential Loans Held For Investment at Fair Value \| Redwood Trust Inc.
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans \| loan	3,296	3,292
Total Principal	$ 2,390,000,000	$ 2,410,000,000
Loan market valuation adjustment		$ 2,430,000,000
Number of loans in foreclosure \| loan		0
Valuation adjustments	(30,000,000)
Transfers from loans held-for-sale to loans held-for-investment	$ 286,000,000
FICO credit score	768
Loan to value ratio	66.00%
Percentage of loans with fixed interest rate	87.00%
Residential Loans Held For Investment at Fair Value \| Redwood Trust Inc. \| Originated Between 2013 and 2017
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Percentage of loan portfolio	96.00%
Residential Loans Held For Investment at Fair Value \| Redwood Trust Inc. \| Originated In 2012 And Prior Years
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Percentage of loan portfolio	4.00%
Residential Loans Held For Investment at Fair Value \| Redwood Trust Inc. \| Hybrid or ARM Loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Weighted average rate on loans	4.23%
Residential Loans Held For Investment at Fair Value \| Redwood Trust Inc. \| Jumbo Loans \| Held-for sale residential loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan market valuation adjustment	$ 2,383,932,000	$ 2,434,386,000
Residential Loans Held For Investment at Fair Value \| Financing Receivables, Equal to Greater than 90 Days Past Due \| Redwood Trust Inc.
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total Principal	$ 1,000,000
Number of loans past due \| loan	2	0
MSRs
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Mortgage servicing rights	$ 2,620,000,000