v3.19.3

Securitization Transactions (Schedule of CLO Securitization Transactions) (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 | Dec. 31, 2018
Securitization Transactions [Line Items] |  |
Fair Value |  | $ 2,939,311
Securities, at fair value | $ 1,875,929 |
CLO I Securitization [Member] |  |
Securitization Transactions [Line Items] |  |
CLO Pricing Date | 2018-08 | 2017-05
CLO Closing Date | 2018-08 | 2017-06
Total Face Amount of Notes Issued | $ 461,840 | $ 373,550
Face Amount of Notes Initially Purchased | 36,579 | 36,606
Aggregate Purchase Price of Notes Initially Purchased | $ 25,622 | $ 35,926
Reset CLO I Securitization [Member] |  |
Securitization Transactions [Line Items] |  |
CLO Pricing Date |  | 2018-08
CLO Closing Date |  | 2018-08
Total Face Amount of Notes Issued |  | $ 461,840
Face Amount of Notes Initially Purchased |  | 36,579
Aggregate Purchase Price of Notes Initially Purchased |  | $ 25,622
CLO II Securitization [Member] |  |
Securitization Transactions [Line Items] |  |
CLO Pricing Date | 2017-12 | 2017-12
CLO Closing Date | 2018-01 | 2018-01
Total Face Amount of Notes Issued | $ 452,800 | $ 452,800
Face Amount of Notes Initially Purchased | 18,223 | 18,223
Aggregate Purchase Price of Notes Initially Purchased | $ 16,621 | $ 16,621
CLO III Securitization [Member] |  |
Securitization Transactions [Line Items] |  |
CLO Pricing Date | 2018-06 | 2018-06
CLO Closing Date | 2018-07 | 2018-07
Total Face Amount of Notes Issued | $ 407,100 | $ 407,100
Face Amount of Notes Initially Purchased | 35,480 | 35,480
Aggregate Purchase Price of Notes Initially Purchased | $ 32,394 | 32,394
CLO IV Securitization [Member] |  |
Securitization Transactions [Line Items] |  |
CLO Pricing Date | 2019-02 |
CLO Closing Date | 2019-03 |
Total Face Amount of Notes Issued | $ 478,488 |
Face Amount of Notes Initially Purchased | 12,700 |
Aggregate Purchase Price of Notes Initially Purchased | 10,618 |
CLOs |  |
Securitization Transactions [Line Items] |  |
Fair Value |  | 123,893
CLOs | CLO I Securitization [Member] |  |
Securitization Transactions [Line Items] |  |
Fair Value |  | 0
Securities, at fair value | 14,071 |
CLOs | Reset CLO I Securitization [Member] |  |
Securitization Transactions [Line Items] |  |
Fair Value |  | 16,973
CLOs | CLO II Securitization [Member] |  |
Securitization Transactions [Line Items] |  |
Fair Value |  | 14,721
Securities, at fair value | 12,079 |
CLOs | CLO III Securitization [Member] |  |
Securitization Transactions [Line Items] |  |
Fair Value |  | $ 19,071
Securities, at fair value | 13,886 |
CLOs | CLO IV Securitization [Member] |  |
Securitization Transactions [Line Items] |  |
Securities, at fair value | $ 9,176 |

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