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Investments Fair Value Changes, Net - Components of Investment Activities (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Investment Holdings [Line Items]
Investment Fair Value Changes, Net	$ (19,538)	$ (1,145)
Investment activities
Investment Holdings [Line Items]
Changes in fair value of assets	(19,538)	(1,145)
Changes in fair value of risk management derivatives	(35,810)	(1,374)
Investment Fair Value Changes, Net	(19,538)	(1,145)
Investment activities | Residential loans held-for-investment, at Redwood
Investment Holdings [Line Items]
Changes in fair value of assets	23,463	1,980
Investment activities | Trading Securities
Investment Holdings [Line Items]
Changes in fair value of assets	(5,601)	270
Investment activities | Net investments in consolidated Sequoia entities
Investment Holdings [Line Items]
Changes in fair value of assets	(1,580)	(1,093)
Investment activities | Risk sharing investments
Investment Holdings [Line Items]
Changes in fair value of assets	$ (10)	$ (928)

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Increase (Decrease) in Fair Value Adjustments on Assets

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- Definition

Amount of unrealized gain (loss) related to the fair value of price risk derivatives designated as fair value hedging instruments, as offset by the gain (loss) on the hedged item to the extent that the fair value hedge is determined to be effective.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959

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