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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, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Other income, net | $ 3,453 | $ 2,812 | $ 8,893 | $ 9,473
Mortgage banking activities, net | 11,224 | 21,200 | 48,396 | 50,850
Residential Mortgage Banking Activities |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Other income, net | 313 | 142 | 1,733 | 1,515
Residential Mortgage Banking Activities | Residential loans, at fair value |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Changes in fair value of assets | 7,236 | 28,135 | 8,406 | 63,122
Residential Mortgage Banking Activities | Single-family rental loans, held-for-sale at fair value |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Changes in fair value of assets | (121) | 0 | (121) | 0
Residential Mortgage Banking Activities | Risk management derivatives, net |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Risk management derivatives | $ 3,796 | $ (7,077) | $ 38,378 | $ (13,787)

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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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