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Stock-Based Compensation (Details 1) - $ / shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 319,086 617,446 656,611 670,009
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price $ 13.53 $ 10.53 $ 10.76 $ 12.58
Share Based Compensation Arrangement by Share Based Payment Award SAR's Outstanding Number 42,152 42,152 42,152 46,572
Share Based Compensation Arrangement by Share Based Payment Award SAR's Outstanding Weighted Average Exercise Price $ 14.14 $ 14.14 $ 14.14 $ 14.06
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures 14,310 14,820 183,251  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value $ 7.91 $ 7.60 $ 2.19  
Share Based Compensation Arrangement by Share Based Payment Award SAR's Grants in Period 0 0 0  
Share Based Compensation Arrangement by Share Based Payment Award SAR's Grants in Period Weighted Average Grant Date Fair Value $ 0.00 $ 0.00 $ 0.00  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period 159,069 26,966 170,897  
Share Based Compensation Arrangement by Share Based Payment Award Option Exercises in Period Weighted Average Grant Date Fair Value $ 3.35 $ 3.28 $ 7.81  
Share Based Compensation Arrangement by Share Based Payment Award SAR's Exercises in Period 0 0 0  
Share Based Compensation Arrangement by Share Based Payment Award SAR's Exercises in Period Weighted Average Grant Date Fair Value $ 0.00 $ 0.00 $ 0.00  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period (153,601) (27,019) (25,752)  
Share Based Compensation Arrangement by Share Based Payment Award Option Cancelled Forfeited in Period Weighted Average Grant Date Fair Value $ 11.48 $ 21.88 $ 16.76  
Share Based Compensation Arrangement by Share Based Payment Award SAR's Forfeitures in Period 0 0 (4,420)  
Share Based Compensation Arrangement by Share Based Payment Award SAR's Cancelled Forfeited in Period Weighted Average Grant Date Fair Value $ 0.00 $ 0.00 $ 13.31