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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, 2015
USD ($)
$ / shares
shares
Stock Option [Member]  
Vested  
Number of units outstanding, Vested (in shares) | shares 1,332,741
Weighted-average fair value per unit, Vested (in dollars per share) | $ / shares $ 5.34
Total grant-date fair value of the plan, Vested $ 7,123
Weighted-average accumulated percentage of service, Vested 100.00%
Stock-based compensation recognized in Additional paid-in capital, vested $ 7,123
Non-Vested  
Number of units outstanding, Non-vested (in shares) | shares 693,153
Weighted-average fair market value per unit, Non-vested (in dollars per share) | $ / shares $ 3.88
Total grant-date fair value of the plan, Non-vested $ 2,687
Weighted-average accumulated percentage of service, Non-vested 76.50%
Stock-based compensation recognized in Additional paid-in capital, Non-vested $ 2,056
Compensation expense not yet recognized, Non-vested $ 631
Total  
Number of units outstanding, Total (in shares) | shares 2,025,894
Weighted-average fair market value per unit, Total (in dollars per share) | $ / shares $ 5.87
Total grant-date fair value of the plan, Total $ 9,810
Weighted-average accumulated percentage of service, Total 94.70%
Stock-based compensation recognized in Additional paid-in capital $ 9,179
Compensation expense not yet recognized, Total $ 631
Restricted Share Units [Member]  
Total  
Number of units outstanding, Total (in shares) | shares 1,230,210
Weighted-average fair market value per unit, Total (in dollars per share) | $ / shares $ 7.96
Total grant-date fair value of the plan, Total $ 9,792
Weighted-average accumulated percentage of service, Total 44.70%
Stock-based compensation recognized in Additional paid-in capital $ 4,376
Compensation expense not yet recognized, Total $ 5,416