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Residential Loans - Summary of Classifications and Carrying Value of Residential Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Mortgage Loans on Real Estate [Line Items]
Residential loans	$ 3,928,803	$ 3,398,573
Residential Loans at Fair Value
Mortgage Loans on Real Estate [Line Items]
Residential loans	1,110,000	1,340,000
Residential Loans at Fair Value | Conforming Loan
Mortgage Loans on Real Estate [Line Items]
Residential loans	129,819	244,714
Residential Loans at Fair Value | Jumbo Loan
Mortgage Loans on Real Estate [Line Items]
Residential loans	984,486	1,096,317
Residential Loans at Lower of Cost or Fair Value
Mortgage Loans on Real Estate [Line Items]
Residential loans	1,433	1,488
Residential Loans Held For Investment at Fair Value
Mortgage Loans on Real Estate [Line Items]
Residential loans	1,790,000	580,000
Residential Loans Held For Investment at Fair Value | Jumbo Loan
Mortgage Loans on Real Estate [Line Items]
Residential loans	2,813,065	581,668
Residential Loans Held For Investment At Amortized Cost
Mortgage Loans on Real Estate [Line Items]
Residential loans		1,474,386
Redwood
Mortgage Loans on Real Estate [Line Items]
Residential loans	2,906,933	1,924,187
Redwood | Residential Loans at Fair Value | Conforming Loan
Mortgage Loans on Real Estate [Line Items]
Residential loans	129,819	244,714
Redwood | Residential Loans at Fair Value | Jumbo Loan
Mortgage Loans on Real Estate [Line Items]
Residential loans	984,486	1,096,317
Redwood | Residential Loans at Lower of Cost or Fair Value
Mortgage Loans on Real Estate [Line Items]
Residential loans	1,433	1,488
Redwood | Residential Loans Held For Investment at Fair Value | Jumbo Loan
Mortgage Loans on Real Estate [Line Items]
Residential loans	1,791,195	581,668
Redwood | Residential Loans Held For Investment At Amortized Cost
Mortgage Loans on Real Estate [Line Items]
Residential loans		0
Sequoia
Mortgage Loans on Real Estate [Line Items]
Residential loans	1,021,870	1,474,386
Sequoia | Residential Loans at Fair Value | Conforming Loan
Mortgage Loans on Real Estate [Line Items]
Residential loans	0	0
Sequoia | Residential Loans at Fair Value | Jumbo Loan
Mortgage Loans on Real Estate [Line Items]
Residential loans	0	0
Sequoia | Residential Loans at Lower of Cost or Fair Value
Mortgage Loans on Real Estate [Line Items]
Residential loans	0	0
Sequoia | Residential Loans Held For Investment at Fair Value | Jumbo Loan
Mortgage Loans on Real Estate [Line Items]
Residential loans	$ 1,021,870	0
Sequoia | Residential Loans Held For Investment At Amortized Cost
Mortgage Loans on Real Estate [Line Items]
Residential loans		$ 1,474,386

X

- Definition

Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of consumer loans, including, but not limited to, mortgage, home equity, vehicles, credit card, installment, and lease financing. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5066-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5074-111524

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522

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+ References

No definition available.

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