Capital - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions |
9 Months Ended | |||
|---|---|---|---|---|
Aug. 14, 2015 |
Aug. 12, 2015 |
Sep. 30, 2015 |
Jul. 01, 2015 |
|
| Subsidiary Sale Of Stock [Line Items] | ||||
| Common stock available for sale, value | $ 150.0 | |||
| Effective date of registration statement | Jul. 20, 2015 | |||
| Gross proceeds from public offering | $ 120.0 | |||
| Net proceeds after underwriting discounts | 113.7 | |||
| Amount of net proceeds used for repayment of outstanding debt | $ 29.0 | |||
| Common Stock | ||||
| Subsidiary Sale Of Stock [Line Items] | ||||
| Common stock shares issued | 6,233,766 | 272,035 | ||
| Shares issued, price per share | $ 19.25 | |||
| Over-Allotments | ||||
| Subsidiary Sale Of Stock [Line Items] | ||||
| Gross proceeds from public offering | $ 18.0 | |||
| Net proceeds after underwriting discounts | $ 17.1 | |||
| Over-Allotments | Common Stock | ||||
| Subsidiary Sale Of Stock [Line Items] | ||||
| Shares issued, price per share | $ 19.25 | |||
| Over-Allotments | Common Stock | Maximum | ||||
| Subsidiary Sale Of Stock [Line Items] | ||||
| Common stock shares issued | 935,065 |