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Mortgage Banking Activities, Net - Components of Mortgage Banking Activities (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Mortgage banking activities, net | $ 9,766 | $ 1,333 | $ 24,712 | $ 10,706
Residential Mortgage Banking Activities |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Other income (expense), net / other fee income | 382 | 1,177 | 606 | 3,209
Mortgage banking activities, net | 9,766 | 331 | 26,774 | 7,383
Residential Mortgage Banking Activities | Residential loans, at fair value |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Changes in fair value of assets | 12,671 | 36,183 | 47,456 | 54,375
Residential Mortgage Banking Activities | Sequoia securities |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Changes in fair value of assets | 0 | 0 | 1,455 | (14,359)
Residential Mortgage Banking Activities | Risk management derivatives, net |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Risk management derivatives | (3,287) | (37,029) | (22,743) | (35,842)
Commercial Mortgage Banking Activities |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Other income (expense), net / other fee income | 0 | 109 | 43 | 336
Mortgage banking activities, net | 0 | 1,002 | (2,062) | 3,323
Commercial Mortgage Banking Activities | Risk management derivatives, net |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Risk management derivatives | 0 | (3,081) | (2,538) | (7,832)
Commercial Mortgage Banking Activities | Commercial loans, at fair value |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Changes in fair value of assets | $ 0 | $ 3,974 | $ 433 | $ 10,819

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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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- 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 + Details
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- Definition Fees and other service revenues recognized in the period that are not otherwise specified in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(d)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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