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Real Estate Securities - Gross Realized Gains and Losses on Sales and Calls of Available for Sale Securities (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Total Realized Gains on Sales and Calls of AFS Securities, net | $ 7,275 | $ 1,734 | $ 21,352 | $ 9,561
Sales |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Gross realized gains | 7,275 | 1,734 | 21,312 | 9,381
Gross realized losses | 0 | 0 | (3) | 0
Calls |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Gross realized gains | 0 | 0 | 43 | 677
Gross realized losses | $ 0 | $ 0 | $ 0 | $ (497)

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- Definition Available-for-sale Securities, Gross Realized Gain (Loss) On Sales And Calls + References No definition available. + Details
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- Definition This item represents the gross loss realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
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