Debt - Summary of Components of Interest Expense Related to Borrowings (Footnote) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Debt Disclosure [Abstract] | ||||
| Facility fees | $ 0.5 | $ 0.4 | $ 1.5 | $ 1.2 |