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Investment Fair Value Changes, Net - Components of Investment Activities (Details) - Investment Fair Value Changes, Net - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Investment Holdings [Line Items]
Changes in fair value of assets	$ 1,551	$ (19,538)
Changes in fair value of risk management derivatives	(5,127)	(35,810)
Investment Fair Value Changes, Net	1,551	(19,538)
Residential loans held-for-investment at Redwood
Investment Holdings [Line Items]
Changes in fair value of assets	(2,333)	23,463
Trading securities retained, at fair value
Investment Holdings [Line Items]
Changes in fair value of assets	11,143	(5,601)
Net investments in consolidated Sequoia entities
Investment Holdings [Line Items]
Changes in fair value of assets	(1,810)	(1,580)
Risk sharing investments
Investment Holdings [Line Items]
Changes in fair value of assets	(205)	(10)
Impairments on AFS securities
Investment Holdings [Line Items]
Changes in fair value of assets	$ (117)	$ 0

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- Definition

Increase (Decrease) in Fair Value Adjustments on Assets

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Investment Activities, Net

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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=64837297&loc=SL5624171-113959

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