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Consolidated Investment Product - Additional Information (Details) |  | 3 Months Ended |
--- | --- | --- | ---
Aug. 17, 2015 USD ($) | Sep. 30, 2015 USD ($) Product | Dec. 31, 2014 USD ($) Product
Variable Interest Entity [Line Items] |  |  |
Investment of capital |  | $ 20,000,000 |
Number of consolidated investment products | Product |  | 1 | 0
Consolidated Investment Product [Member] |  |  |
Variable Interest Entity [Line Items] |  |  |
Debt outstanding |  | $ 9,140,000 | $ 0
Consolidated Investment Product [Member] | Secured Debt [Member] | Financing Facility [Member] |  |  |
Variable Interest Entity [Line Items] |  |  |
Debt term | 3 years |  |
Maximum borrowing capacity | $ 160,000,000.0 |  |
Debt outstanding |  | $ 9,100,000 |
Consolidated Investment Product [Member] | Secured Debt [Member] | Financing Facility [Member] | LIBOR [Member] |  |  |
Variable Interest Entity [Line Items] |  |  |
Basis spread on variable interest rate | 1.25% |  |
Term of initial ramp-up period | 9 months |  |
Basis spread on variable interest rate upon completion of initial ramp-up period | 2.00% |  |

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