Asset-Backed Securities Issued - Components of Asset-Backed Securities Issued by Consolidated Securitization Entities Sponsored, Along With Other Selected Information (Detail) $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2015 USD ($) series	Dec. 31, 2014 USD ($) series
Debt Instrument [Line Items]
ABS issued principal	[1],[2]	$ 1,262,122	$ 1,545,119
Asset-backed Securities
Debt Instrument [Line Items]
Market valuation adjustments		(120,707)
Unamortized discount			(12,373)
ABS issued principal		1,262,122	1,545,119
Asset-backed Securities | Certificates With Principal Value
Debt Instrument [Line Items]
Principal value		1,377,818	1,555,413
Asset-backed Securities | Interest Only Certificates
Debt Instrument [Line Items]
Principal value		5,011	2,079
Asset-backed Securities | Sequoia
Debt Instrument [Line Items]
Market valuation adjustments		(120,707)
Unamortized discount			(12,373)
ABS issued principal		$ 1,173,336	$ 1,416,762
Number of series | series		24	24
Asset-backed Securities | Sequoia | Minimum
Debt Instrument [Line Items]
Weighted average interest rates, by series		0.39%	0.36%
Stated maturities		2017	2014
Asset-backed Securities | Sequoia | Maximum
Debt Instrument [Line Items]
Weighted average interest rates, by series		4.33%	4.27%
Stated maturities		2041	2041
Asset-backed Securities | Sequoia | Certificates With Principal Value
Debt Instrument [Line Items]
Principal value		$ 1,289,032	$ 1,427,056
Asset-backed Securities | Sequoia | Interest Only Certificates
Debt Instrument [Line Items]
Principal value		5,011	2,079
Asset-backed Securities | Residential Resecuritization
Debt Instrument [Line Items]
ABS issued principal		$ 18,872	$ 45,044
Weighted average interest rates, by series		2.18%	2.16%
Stated maturities		2046	2046
Number of series | series		1	1
Asset-backed Securities | Residential Resecuritization | Certificates With Principal Value
Debt Instrument [Line Items]
Principal value		$ 18,872	$ 45,044
Asset-backed Securities | Commercial Securitization
Debt Instrument [Line Items]
ABS issued principal		$ 69,914	$ 83,313
Weighted average interest rates, by series		5.62%	5.62%
Stated maturities		2018	2018
Number of series | series		1	1
Asset-backed Securities | Commercial Securitization | Certificates With Principal Value
Debt Instrument [Line Items]
Principal value		$ 69,914	$ 83,313

[1] On January 1, 2015, we adopted ASU 2014-13 and began to account for residential loans held-for-investment and asset backed securities issued at consolidated Sequoia entities (which are VIEs) at fair value. At December 31, 2014, amounts presented in residential loans held-for-investment for these assets included $1,474,386 at historical cost. See Note 3 for further discussion.

[2] Our consolidated balance sheets include assets of consolidated variable interest entities (“VIEs”) that can only be used to settle obligations of these VIEs and liabilities of consolidated VIEs for which creditors do not have recourse to the primary beneficiary (Redwood Trust, Inc.). At June 30, 2015 and December 31, 2014, assets of consolidated VIEs totaled $1,622,636 and $1,900,208, respectively, and liabilities of consolidated VIEs totaled $1,263,249 and $1,546,490, respectively. See Note 4 for further discussion.