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Significant Accounting Policies (Stock Transactions - Stock Options Outstanding And Exercisable) (Details)
3 Months Ended
Mar. 31, 2016
$ / shares
shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding: Shares Outstanding | shares 564,396
Options Outstanding: Weighted Average Remaining Contractual Life (in years) 5 years 7 months 6 days
Options Outstanding: Weighted Average Exercise Price $ 7.72
Options Exercisable: Shares Exercisable | shares 410,234
Options Exercisable: Weighted Average Exercise Price $ 6.76
Range Of Option Exercise Prices 0.00-4.00 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of exercise prices, lower 0.00
Range of exercise prices, upper $ 4.00
Options Outstanding: Shares Outstanding | shares 89,000
Options Outstanding: Weighted Average Remaining Contractual Life (in years) 3 years
Options Outstanding: Weighted Average Exercise Price $ 3.85
Options Exercisable: Shares Exercisable | shares 89,000
Options Exercisable: Weighted Average Exercise Price $ 3.85
Range Of Option Exercise Prices 4.01-8.00 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of exercise prices, lower 4.01
Range of exercise prices, upper $ 8.00
Options Outstanding: Shares Outstanding | shares 281,950
Options Outstanding: Weighted Average Remaining Contractual Life (in years) 5 years 1 month 6 days
Options Outstanding: Weighted Average Exercise Price $ 6.73
Options Exercisable: Shares Exercisable | shares 263,785
Options Exercisable: Weighted Average Exercise Price $ 6.66
Range Of Option Exercise Prices 8.01-12.00 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of exercise prices, lower 8.01
Range of exercise prices, upper $ 12.00
Options Outstanding: Shares Outstanding | shares 102,551
Options Outstanding: Weighted Average Remaining Contractual Life (in years) 9 years 4 months 24 days
Options Outstanding: Weighted Average Exercise Price $ 9.71
Options Exercisable: Shares Exercisable | shares 15,554
Options Exercisable: Weighted Average Exercise Price $ 9.32
Range Of Option Exercise Prices 12.01-16.00 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of exercise prices, lower 12.01
Range of exercise prices, upper $ 16.00
Options Outstanding: Shares Outstanding | shares 90,895
Options Outstanding: Weighted Average Remaining Contractual Life (in years) 5 years 7 months 6 days
Options Outstanding: Weighted Average Exercise Price $ 12.32
Options Exercisable: Shares Exercisable | shares 41,895
Options Exercisable: Weighted Average Exercise Price $ 12.62