Stockholders' Equity (Monte-Carlo Simulation Pricing Model) (Details) - Performance Shares [Member] |
12 Months Ended |
---|---|
Dec. 31, 2016
$ / shares
| |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
Share-Based Compensation Arrangment By Share-Based Payment Award, Fair Value Assumptions, Simulation Period | 4 years 10 months 10 days |
Share Price | $ 20.06 |
Expected volatility | 31.20% |
Risk-free interest rate | 1.21% |
Share-Based Compensation Arrangement By Share-Based Payment Award, Fair Value Assumptions, Forfeiture Rate | 2.00% |