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Stock Compensation (Restricted Stock Activity) (Details) - Restricted Stock [Member]
$ in Thousands
1 Months Ended 12 Months Ended
Apr. 01, 2016
USD ($)
directors
shares
Oct. 10, 2015
shares
Jul. 23, 2014
USD ($)
shares
Oct. 31, 2013
USD ($)
shares
May 31, 2013
USD ($)
shares
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Apr. 30, 2016
USD ($)
Nov. 10, 2015
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Total compensation cost not yet recognized           $ 37,853 $ 44,632      
Total compensation cost not yet recognized, period for recognition           2 years 8 months 28 days        
April 2016 [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Other than options, grants in period (shares) | shares 52,500                  
Share-based compensation expense $ 236                  
Number of directors | directors 5                  
Award vesting period 3 years                  
Total compensation cost not yet recognized                 $ 1,054  
November 10, 2015 [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Other than options, grants in period (shares) | shares   1,260,000                
Performance period   7 years                
Share-based compensation expense           $ 597 4,278      
Total compensation cost not yet recognized                   $ 28,374
July 23, 2014 [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Other than options, grants in period (shares) | shares     1,157,625              
Performance period   7 years                
Share-based compensation expense           3,122 2,992 $ 1,320    
Total compensation cost not yet recognized     $ 20,780              
May 2013 [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Other than options, grants in period (shares) | shares         12,155          
Share-based compensation expense           111 272 271    
Total compensation cost not yet recognized         $ 815          
October 2013 [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Other than options, grants in period (shares) | shares       31,835            
Share-based compensation expense           $ 85 $ 86 $ 86    
Total compensation cost not yet recognized       $ 458