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Fair Value of Financial Instruments - Market Valuation Adjustments, Net (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2016 | Mar. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Mortgage servicing rights income (loss), net | $ 6,281 | $ (10,924)
Total Market gains and losses, net | (15,848) | (19,435)
Loan Purchase and Forward Sales Commitments |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Market valuations gains and losses, net | 13,000 | 18,000
Mortgage banking activities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Market valuations gains and losses, net | 7,237 | 1,227
Mortgage banking activities | Residential Loans at Fair Value |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Market valuations gains and losses, net | 5,439 | 2,056
Mortgage banking activities | Loan Purchase and Forward Sales Commitments |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Market valuations gains and losses, net | 12,635 | 18,256
Mortgage banking activities | Commercial Loans at Fair Value |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Market valuations gains and losses, net | 433 | 5,857
Mortgage banking activities | Consolidated Sequoia entities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Market valuations gains and losses, net | 1,484 | (14,359)
Mortgage banking activities | Risk managment derivatives |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Market valuations gains and losses, net | (12,754) | (10,583)
Investment activities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Market valuations gains and losses, net | (19,538) | (1,145)
Investment activities | Consolidated Sequoia entities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Market valuations gains and losses, net | (1,580) | (1,093)
Investment activities | Residential loans held-for-investment, at Redwood |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Market valuations gains and losses, net | 23,463 | 1,980
Investment activities | Real estate securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Market valuations gains and losses, net | (5,601) | 270
Investment activities | Risk managment derivatives |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Market valuations gains and losses, net | (35,810) | (1,374)
Investment activities | Other |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Market valuations gains and losses, net | (10) | (928)
MSR Income (loss), net, including risk management derivatives |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Mortgage servicing rights income (loss), net | (3,547) | (19,517)
MSR Income (loss), net, including risk management derivatives | Risk managment derivatives |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Mortgage servicing rights income (loss), net | 41,057 | 0
MSR Income (loss), net, including risk management derivatives | Mortgage servicing rights |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Mortgage servicing rights income (loss), net | $ (44,604) | $ (19,517)

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- Definition Increase (Decrease) in Fair Value Adjustments on Assets + References No definition available. + Details
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- Definition The aggregate net change in market value for certain assets and liabilities that was included in earnings for the period. This includes changes in market values for assets and liabilities accounted for at fair value, as well as the credit portion of other-than-temporary impairments on securities available for sale, impairments on loans held-for-sale and real estate owned. + References No definition available. + Details
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- Definition Includes income (loss) from mortgage banking servicing real estate mortgages, net of subservicing costs, and market valuation changes of MSRs held at fair value. + References No definition available. + Details
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