Annual report pursuant to Section 13 and 15(d)

Stock Compensation (Schedule Of Changes In Number Of Outstanding Stock Options Under Director Plan, Stock Plan And 2011 Incentive Plan) (Details)

v3.8.0.1
Stock Compensation (Schedule Of Changes In Number Of Outstanding Stock Options Under Director Plan, Stock Plan And 2011 Incentive Plan) (Details) - $ / shares
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Stock Compensation [Abstract]      
Options, Outstanding 922,930 721,924  
Options, Awarded 288,186 325,968  
Options, Forfeited (38,457) (124,962)  
Options, Outstanding 1,172,659 922,930 721,924
Options, Exercisable 674,186    
Options, Expected to vest 1,172,659    
Weighted average exercise price per share, Outstanding $ 10.10 $ 11.70  
Weighted average exercise price per share, Awarded 4.35 6.66  
Weighted average exercise price per share, Forfeited 11.61 10.39  
Weighted average exercise price per share, Outstanding 8.63 $ 10.10 $ 11.70
Weighted average exercise price per share, Exercisable 10.46    
Weighted average exercise price per share, Expected to vest $ 8.63    
Options, Outstanding - Weighted average remaining contractual term (in years) 4 years 6 months 18 days 4 years 10 months 24 days 4 years 10 months 21 days
Options, Exercisable - Weighted average remaining contractual term (in years) 3 years 8 months 27 days    
Options, Expected to vest - Weighted average remaining contractual term (in years) 4 years 6 months 18 days