Stock-based Compensation (Details Textual) - USD ($) shares in Millions, $ in Millions |
1 Months Ended | 3 Months Ended | ||
|---|---|---|---|---|
Mar. 31, 2017 |
Mar. 31, 2016 |
Apr. 29, 2017 |
Apr. 30, 2016 |
|
| Stock-based Compensation Disclosures | ||||
| Stock-based compensation expense | $ 1.3 | $ 1.1 | ||
| Restricted stock granted (shares) | 0.2 | |||
| Restricted Stock [Member] | Management [Member] | ||||
| Stock-based Compensation Disclosures | ||||
| Percent of shares awarded | 35.00% | |||
| Performance Shares [Member] | Management [Member] | ||||
| Stock-based Compensation Disclosures | ||||
| Restricted stock granted (shares) | 0.4 | |||
| Percent of shares awarded | 65.00% | |||
| Performance Shares [Member] | Management [Member] | Minimum [Member] | ||||
| Stock-based Compensation Disclosures | ||||
| Percent of Target Shares that May Vest | 0.00% | |||
| Performance Shares [Member] | Management [Member] | Maximum [Member] | ||||
| Stock-based Compensation Disclosures | ||||
| Percent of Target Shares that May Vest | 150.00% | |||