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v3.10.0.1

Consolidation - Additional Information (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) collateralized_loan_obligation | Dec. 31, 2017 USD ($)
Variable Interest Entity [Line Items] |  |
Transfers between level 1 and level 2 | $ 0 | $ 0
CLOs |  |
Variable Interest Entity [Line Items] |  |
Number of consolidated CLOs | collateralized_loan_obligation | 5 |
Number of consolidated CLOs, in warehouse-stage | collateralized_loan_obligation | 1 |
Investments | $ 1,709,266,000 | 1,555,879,000
Transfers between level 2 and level 1 | 0 |
Transfers between level 1 and level 2 | $ 0 |
CLOs | London Interbank Offered Rate (LIBOR) |  |
Variable Interest Entity [Line Items] |  |
Investments, basis spread on variable interest rate | 8.75% |
CLOs | London Interbank Offered Rate (LIBOR) | Minimum |  |
Variable Interest Entity [Line Items] |  |
Basis spread on variable interest rate | 0.80% |
CLOs | London Interbank Offered Rate (LIBOR) | Maximum |  |
Variable Interest Entity [Line Items] |  |
Basis spread on variable interest rate | 7.00% |
CLOs | Senior notes |  |
Variable Interest Entity [Line Items] |  |
Unpaid principal balance exceeds fair value | $ 49,700,000 |
CLOs | CLO senior secured floating rate notes | Senior notes |  |
Variable Interest Entity [Line Items] |  |
Debt par value | 1,400,000,000.0 |
CLOs | CLO subordinated notes |  |
Variable Interest Entity [Line Items] |  |
Debt par value | 1,800,000,000.0 |
CLOs | CLO subordinated notes | Warehouse Facility Debt |  |
Variable Interest Entity [Line Items] |  |
Debt par value | 155,700,000.0 |
CLOs | CLO subordinated notes | Subordinated debt |  |
Variable Interest Entity [Line Items] |  |
Debt par value | 179,800,000.0 |
Consolidated investment products |  |
Variable Interest Entity [Line Items] |  |
Investments | 1,749,568,000 | 1,597,752,000
Transfers between level 2 and level 1 |  | 0
Transfers between level 1 and level 2 |  | $ 0
Nonconsolidated VIEs |  |
Variable Interest Entity [Line Items] |  |
Carrying value and maximum risk of loss | $ 16,400,000 |

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