Valuation (Fair Value of Other Financial Instruments) (Details) - USD ($) $ in Thousands |
Mar. 31, 2019 |
Dec. 31, 2018 |
Mar. 31, 2018 |
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|---|---|---|---|---|---|---|
| Assets: | ||||||
| Cash and cash equivalents(1) | $ 55,876 | [1] | $ 44,656 | $ 44,700 | ||
| Restricted cash | 425 | |||||
| Due from brokers(1) | 58,145 | [1] | 71,794 | |||
| Reverse repurchase agreements | 25,381 | |||||
| Liabilities: | ||||||
| Repurchase agreements(1) | [1] | 1,550,016 | ||||
| Other secured borrowings(1) | 117,315 | [1] | 114,100 | |||
| Senior notes, net | 85,100 | 85,035 | ||||
| Due to brokers | 4,820 | $ 5,553 | ||||
| Fair Value | ||||||
| Assets: | ||||||
| Cash and cash equivalents(1) | 55,876 | |||||
| Restricted cash | 175 | |||||
| Due from brokers(1) | 58,145 | |||||
| Reverse repurchase agreements | 25,381 | |||||
| Liabilities: | ||||||
| Repurchase agreements(1) | 1,550,016 | |||||
| Other secured borrowings(1) | 117,315 | |||||
| Senior notes, net | 85,100 | |||||
| Due to brokers | 4,820 | |||||
| Carrying Value | ||||||
| Assets: | ||||||
| Cash and cash equivalents(1) | 55,876 | |||||
| Restricted cash | 175 | |||||
| Due from brokers(1) | 58,145 | |||||
| Reverse repurchase agreements | 25,381 | |||||
| Liabilities: | ||||||
| Repurchase agreements(1) | 1,550,016 | |||||
| Other secured borrowings(1) | 117,315 | |||||
| Senior notes, net | 85,100 | |||||
| Due to brokers | $ 4,820 | |||||
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