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Components of Mortgage Banking Activities, Net (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |
Sequoia IO securities | $ (1,332) |  | $ (1,866) |  | $ (14,419) |  | $ 36,399 |
Risk management derivatives | (2,404) |  | 442 |  | (18,159) |  | 51,009 |
Mortgage banking activities, net | 17,872 |  | (8,698) |  | 23,950 |  | 85,562 |
Mortgage Banking Activities |  |  |  |  |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |
Sequoia IO securities | (1,332) |  | (1,866) |  | (14,419) |  | 36,399 |
Loan purchase and forward sale commitments | 2,487 |  |  |  | 6,077 |  |  |
Net gains on commercial loan originations and sales |  |  |  |  |  |  | 11,031 |
Mortgage banking activities, net | 17,872 |  | (8,698) |  | 23,950 |  | 85,562 |
Mortgage Banking Activities | Residential Mortgage Banking Activities |  |  |  |  |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |
Loans, at fair value | 13,446 |  | (10,804) |  | 34,554 |  | (17,339) |
Risk management derivatives | (4,297) | [1] | 75 | [1] | (16,433) | [1] | 48,583 | [1]
Other | 1,082 |  | 359 |  | 1,871 |  | 1,635 |
Mortgage banking activities, net | 11,386 |  | (12,236) |  | 11,650 |  | 69,278 |
Mortgage Banking Activities | Commercial Mortgage Banking Activities |  |  |  |  |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |
Loans, at fair value | 4,305 |  | 3,171 |  | 13,644 |  | 2,826 |
Risk management derivatives | 1,892 | [1] | 367 | [1] | (1,726) | [1] | 2,426 | [1]
Other | 289 | [2] |  |  | 382 | [2] | 1 | [2]
Mortgage banking activities, net | $ 6,486 |  | $ 3,538 |  | $ 12,300 |  | $ 16,284 |
[1] | Represents market valuation changes of derivatives that are used to manage risks associated with our accumulation of residential and commercial loans.
[2] | Amounts in this line item include other fee income and the provision for repurchase expenses, presented net.

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- Definition Forward Purchase Commitment Fair Value Hedge Liability At Fair Value + References No definition available. + Details
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- Definition Gain (Loss) on Sales of Commercial Loans and Originations, Net + References No definition available. + Details
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- Definition The aggregate net change in market value for derivative instruments associated with mortgage banking activities. + References No definition available. + Details
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- Definition The net income attributable to mortgage banking activities. This includes market valuations related to residential and commercial loans, Sequoia IOs, and mortgage banking derivatives, as well as realized gains or losses associated with mortgage loan sales. + References No definition available. + Details
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