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Share-Based Compensation (Narrative) (Details) - USD ($)
1 Months Ended 12 Months Ended
Jun. 30, 2011
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted-average grant date fair value per share   $ 6.87    
Fair value of vested shares   $ 811,000 $ 2,869,000 $ 934,000
Chief Executive Officer [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares granted to Company's President 2,500,000      
Average annual TSR threshold 6.50%      
Vesting period 7 years      
Appraisal value $ 4.39      
Grant date market price $ 4.98      
2012 Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares available for grant under Stock Incentive Plan   1,200,000    
Aggregate cost of awards not yet recognized   $ 6,100,000    
Unrecognized cost recognition period   2 years 4 months 24 days    
2012 Plan [Member] | Time-Based Awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares issued   491,000 180,000 133,000
Weighted-average grant date fair value per share   $ 6.87 $ 7.43 $ 6.32