Investment in Loans Investment in Loans (Schedule of Corporate Loans) (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Mar. 31, 2020 |
Dec. 31, 2019 |
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| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||
| Unpaid Principal Balance | $ 1,441,017 | $ 1,387,733 | ||
| Loans, at fair value | [1] | 1,443,589 | 1,412,426 | |
| Corporate loan [Member] | ||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||
| Unpaid Principal Balance | 6,114 | 18,415 | ||
| Loans, at fair value | $ 6,114 | $ 18,510 | ||
| Weighted Average | ||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||
| Weighted Average Coupon | 4.13% | 4.23% | ||
| Weighted average life | 4 years 5 months 12 days | 5 years 10 months 24 days | ||
| Weighted Average | Corporate loan [Member] | ||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||
| Weighted Average Coupon | 19.35% | 17.62% | ||
| Weighted average life | 3 years 3 months 18 days | 10 months 13 days | ||
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