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Share-Based Compensation (Summary of Vested and Nonvested Awards) (Details) - 2011 Equity Incentive Plan [Member] $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2017 USD ($) $ / shares shares
Stock Option [Member] |
Vested |
Number of units outstanding, Vested (in shares) | shares | 540,331
Weighted-average fair value per unit, Vested (in dollars per share) | $ / shares | $ 4.58
Total grant-date fair value of the plan, Vested | $ 2,476
Weighted-average accumulated percentage of service, Vested (as a percent) | 100.00%
Stock-based compensation recognized in Additional paid-in capital, vested | $ 2,476
Non-Vested |
Number of units outstanding, Non-vested (in shares) | shares | 94,158
Weighted-average fair market value per unit, Non-vested (in dollars per share) | $ / shares | $ 2.53
Total grant-date fair value of the plan, Non-vested | $ 238
Weighted-average accumulated percentage of service, Non-vested (as a percent) | 86.60%
Stock-based compensation recognized in Additional paid-in capital, Non-vested | $ 206
Compensation expense not yet recognized, Non-vested | $ 32
Total |
Number of units outstanding, Total (in shares) | shares | 634,489
Weighted-average fair market value per unit, Total (in dollars per share) | $ / shares | $ 4.28
Total grant-date fair value of the plan, Total | $ 2,714
Weighted-average accumulated percentage of service, Total (as a percent) | 98.80%
Stock-based compensation recognized in Additional paid-in capital | $ 2,682
Compensation expense not yet recognized, Total | $ 32
Restricted Share Units [Member] |
Total |
Number of units outstanding, Total (in shares) | shares | 1,736,845
Weighted-average fair market value per unit, Total (in dollars per share) | $ / shares | $ 6.65
Total grant-date fair value of the plan, Total | $ 11,542
Weighted-average accumulated percentage of service, Total (as a percent) | 49.80%
Stock-based compensation recognized in Additional paid-in capital | $ 5,744
Compensation expense not yet recognized, Total | $ 5,798

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