v3.19.1

Securitization Transactions Narrative (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Aug. 31, 2016 | Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018 | Dec. 31, 2017
Securitization Transactions [Line Items] |  |  |  |  |  |  |  |
Face amount of notes distributed from Risk Retention Vehicle |  |  |  |  |  | $ 5,600 |  |
Proceeds received from equity investment in risk retention vehicle (liquidation) |  |  |  |  |  | 5,700 |  |
Minimum economic interest required to be retained |  |  |  |  | 5.00% |  |  |
TBA securities, at fair value |  |  |  |  |  | $ 2,939,311 |  |
Participation in Multi-Seller Consumer Loan Securitization [Member] |  |  |  |  |  |  |  |
Securitization Transactions [Line Items] |  |  |  |  |  |  |  |
Aggregate unpaid principal balance of loans sold |  | $ 124,000 |  |  |  |  |  |
Company's share of loans sold |  | 51.00% |  |  |  |  |  |
Co-participants share of loans sold |  | 49.00% |  |  |  |  |  |
Loss on securitization of financial assets |  | $ (100) |  |  |  |  |  |
Senior notes issued in securitization transaction |  | 87,000 |  |  |  |  |  |
Subordinated notes issued in securitization transaction |  | $ 18,700 |  |  |  |  |  |
Company's initial percentage ownership of jointly owned entity |  | 51.00% |  |  |  |  |  |
Affiliated co-participants initial percentage ownership of jointly owned entity |  | 49.00% |  |  |  |  |  |
Company's current percentage ownership of jointly owned entity |  |  | 49.60% |  |  | 62.00% |  | 75.00%
Maximum amount at risk |  |  | $ 2,600 |  |  |  |  |
CLO I Securitization [Member] |  |  |  |  |  |  |  |
Securitization Transactions [Line Items] |  |  |  |  |  |  |  |
Loss on securitization of financial assets |  |  |  |  | $ 200 |  |  |
The Company [Member] | CLO I Securitization [Member] |  |  |  |  |  |  |  |
Securitization Transactions [Line Items] |  |  |  |  |  |  |  |
Corporate loans transferred into CLO securitization |  |  |  |  | 62,000 |  |  |
Affiliated Entity [Member] | CLO I Securitization [Member] |  |  |  |  |  |  |  |
Securitization Transactions [Line Items] |  |  |  |  |  |  |  |
Corporate loans transferred into CLO securitization |  |  |  |  | $ 141,700 |  |  |
CLOs |  |  |  |  |  |  |  |
Securitization Transactions [Line Items] |  |  |  |  |  |  |  |
TBA securities, at fair value |  |  |  |  |  | $ 123,893 |  |
CLOs | CLO I Securitization [Member] |  |  |  |  |  |  |  |
Securitization Transactions [Line Items] |  |  |  |  |  |  |  |
TBA securities, at fair value | [1],[2] |  | $ 17,742 | [3] |  | 0 | [4] |
CLOs | Distributed from Risk Retention Vehicle [Member] |  |  |  |  |  |  |  |
Securitization Transactions [Line Items] |  |  |  |  |  |  |  |
TBA securities, at fair value |  |  |  |  |  | $ 4,300 |  |
Non-QM loan securitization |  |  |  |  |  |  |  |
Securitization Transactions [Line Items] |  |  |  |  |  |  |  |
Threshold for exercising Optional Redemption |  |  | 30.00% |  |  | 30.00% |  |
Percentage used to calculate servicing administrator fee |  |  | 0.03% |  |  | 0.03% |  |
[1] | In August 2018, the notes originally issued by the CLO I Issuer in 2017 were fully redeemed, and the CLO I Issuer simultaneously issued new notes in conjunction with this full redemption.
[2] | Included on the Company's Consolidated Condensed Schedule of Investments in Collateralized Loan Obligations.
[3] | Includes secured and unsecured subordinated notes.
[4] | Excludes the Company's equity investment in the CLO I Risk Retention Vehicle, as discussed above.

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