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Stock-Based Compensation (Schedule Of Stock Option Activity) (Details)
$ / shares in Units, $ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2016
USD ($)
$ / shares
shares
Dec. 31, 2015
USD ($)
$ / shares
shares
Stock-Based Compensation [Abstract]    
Outstanding at December 31, 2015, Shares | shares 298,750  
Outstanding at December 31, 2015, Weighted Average Exercise Price | $ / shares $ 9.81  
Outstanding at December 31, 2015, Weighted Average Remaining Contractual Term 3 years 1 month 6 days 2 years 4 months 24 days
Outstanding at December 31, 2015, Aggregate Intrinsic Value | $ $ 3,866  
Exercised, Shares | shares (140,000)  
Exercised, Weighted Average Exercise price | $ / shares $ 7.14  
Exercised, Aggregate Intrinsic Value | $ $ 2,093  
Outstanding at September 30, 2016, Shares | shares 158,750 298,750
Outstanding at September 30, 2016, Weighted Average Exercise Price | $ / shares $ 12.16 $ 9.81
Outstanding at September 30, 2016, Weighted Average Remaining Contractual Term 3 years 1 month 6 days 2 years 4 months 24 days
Outstanding at September 30, 2016, Aggregate Intrinsic Value | $ $ 2,229 $ 3,866
Exercisable at September 30, 2016, Shares | shares [1] 158,750  
Exercisable at September 30, 2016, Weighted Average Exercise Price | $ / shares [1] $ 12.16  
Exercisable at September 30, 2016, Weighted Average Remaining Contractual [1] 3 years 1 month 6 days  
Exercisable at September 30, 2016, Aggregate Intrinsic Value | $ [1] $ 2,229  
In-the-money options, shares | shares 158,750  
In-the-money options, weighted-average exercise price | $ / shares 12.16  
[1] Includes in-the-money options totaling 158,750 shares at a weighted-average exercise price of $12.16.