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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
Dec. 31, 2016
USD ($)
$ / shares
shares
Stock Option [Member]  
Vested  
Number of units outstanding, Vested (in shares) | shares 584,103
Weighted-average fair value per unit, Vested (in dollars per share) | $ / shares $ 4.88
Total grant-date fair value of the plan, Vested $ 2,852
Weighted-average accumulated percentage of service, Vested (as a percent) 100.00%
Stock-based compensation recognized in Additional paid-in capital, vested $ 2,852
Non-Vested  
Number of units outstanding, Non-vested (in shares) | shares 192,372
Weighted-average fair market value per unit, Non-vested (in dollars per share) | $ / shares $ 3.18
Total grant-date fair value of the plan, Non-vested $ 612
Weighted-average accumulated percentage of service, Non-vested (as a percent) 81.40%
Stock-based compensation recognized in Additional paid-in capital, Non-vested $ 498
Compensation expense not yet recognized, Non-vested $ 114
Total  
Number of units outstanding, Total (in shares) | shares 776,475
Weighted-average fair market value per unit, Total (in dollars per share) | $ / shares $ 4.46
Total grant-date fair value of the plan, Total $ 3,464
Weighted-average accumulated percentage of service, Total (as a percent) 96.70%
Stock-based compensation recognized in Additional paid-in capital $ 3,350
Compensation expense not yet recognized, Total $ 114
Restricted Share Units [Member]  
Total  
Number of units outstanding, Total (in shares) | shares 1,780,997
Weighted-average fair market value per unit, Total (in dollars per share) | $ / shares $ 6.07
Total grant-date fair value of the plan, Total $ 10,807
Weighted-average accumulated percentage of service, Total (as a percent) 49.67%
Stock-based compensation recognized in Additional paid-in capital $ 5,368
Compensation expense not yet recognized, Total $ 5,439