Subsequent Events (Details) - Revolving Credit Facility - Line of Credit - USD ($) $ in Millions |
Nov. 02, 2017 |
Sep. 30, 2017 |
|---|---|---|
| Subsequent Event [Line Items] | ||
| Current borrowing capacity | $ 350.0 | |
| Subsequent Event | ||
| Subsequent Event [Line Items] | ||
| Current borrowing capacity | $ 575.0 |