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Share Based Compensation (Options Outstanding And Exercisable) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2017
Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 0   0
2.54 to 6.00 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Range of exercise price, Lower   $ 2.54  
Range of exercise price, Upper   6.00  
6.01 to 10.00 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Range of exercise price, Lower   6.01  
Range of exercise price, Upper   10.00  
10.01 to 17.50 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Range of exercise price, Lower   10.01  
Range of exercise price, Upper   17.50  
17.51 to 20.00 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Range of exercise price, Lower   17.51  
Range of exercise price, Upper   20.00  
20.01 to 25.93 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Range of exercise price, Lower   20.01  
Range of exercise price, Upper   $ 25.93  
Employee Stock Option and Stock Appreciation Rights (SARs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options Outstanding, number of awards 303,472 303,472  
Options Outstanding, WAEP $ 17.20 $ 17.20  
Options Outstanding, Aggregate Intrinsic Value $ 2,604 $ 2,604  
Options Exercisable, number of awards 115,827 115,827  
Options Exercisable, WAEP $ 15.02 $ 15.02  
Options Exercisable, Aggregate Intrinsic Value $ 1,239 $ 1,239  
Employee Stock Option and Stock Appreciation Rights (SARs) [Member] | 2.54 to 6.00 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options Outstanding, number of awards 5,000 5,000  
Options Outstanding, WAEP $ 2.54 $ 2.54  
Options Outstanding, Wted. Avg. Remaining Contractual Life (yrs)   5 years 9 months 29 days  
Options Outstanding, Aggregate Intrinsic Value $ 116 $ 116  
Options Exercisable, number of awards 5,000 5,000  
Options Exercisable, WAEP $ 2.54 $ 2.54  
Options Exercisable, Aggregate Intrinsic Value $ 116 $ 116  
Employee Stock Option and Stock Appreciation Rights (SARs) [Member] | 6.01 to 10.00 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options Outstanding, number of awards 5,640 5,640  
Options Outstanding, WAEP $ 8.91 $ 8.91  
Options Outstanding, Wted. Avg. Remaining Contractual Life (yrs)   1 year 3 months 15 days  
Options Outstanding, Aggregate Intrinsic Value $ 94 $ 94  
Options Exercisable, number of awards 5,640 5,640  
Options Exercisable, WAEP $ 8.91 $ 8.91  
Options Exercisable, Aggregate Intrinsic Value $ 94 $ 94  
Employee Stock Option and Stock Appreciation Rights (SARs) [Member] | 10.01 to 17.50 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options Outstanding, number of awards 166,717 166,717  
Options Outstanding, WAEP $ 12.01 $ 12.01  
Options Outstanding, Wted. Avg. Remaining Contractual Life (yrs)   7 years 6 months 26 days  
Options Outstanding, Aggregate Intrinsic Value $ 2,275 $ 2,275  
Options Exercisable, number of awards 66,687 66,687  
Options Exercisable, WAEP $ 12.01 $ 12.01  
Options Exercisable, Aggregate Intrinsic Value $ 910 $ 910  
Employee Stock Option and Stock Appreciation Rights (SARs) [Member] | 17.51 to 20.00 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options Outstanding, number of awards 15,100 15,100  
Options Outstanding, WAEP $ 17.81 $ 17.81  
Options Outstanding, Wted. Avg. Remaining Contractual Life (yrs)   9 months 11 days  
Options Outstanding, Aggregate Intrinsic Value $ 119 $ 119  
Options Exercisable, number of awards 15,100 15,100  
Options Exercisable, WAEP $ 17.81 $ 17.81  
Options Exercisable, Aggregate Intrinsic Value $ 119 $ 119  
Employee Stock Option and Stock Appreciation Rights (SARs) [Member] | 20.01 to 25.93 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options Outstanding, number of awards 111,015 111,015  
Options Outstanding, WAEP $ 25.99 $ 25.99  
Options Outstanding, Wted. Avg. Remaining Contractual Life (yrs)   7 years 7 months 21 days  
Options Outstanding, Aggregate Intrinsic Value $ 0 $ 0  
Options Exercisable, number of awards 23,400 23,400  
Options Exercisable, WAEP $ 25.93 $ 25.93  
Options Exercisable, Aggregate Intrinsic Value $ 0 $ 0