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Capital Stock and Stock Compensation (Narrative) (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Jul. 31, 2019
Apr. 30, 2019
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Mar. 05, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock repurchase program, authorized amount             $ 30,000,000
Purchase of treasury stock         $ 0 $ 0  
Restricted Stock Units (RSUs) [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Granted 26,451            
Granted, per share $ 19.00            
Shares paid for tax withholding for share based compensation     587 589 21,589 23,013  
Shares paid for tax withholding for share based compensation, per share amount     $ 15.97 $ 21.48 $ 17.07 $ 17.81  
Performance Shares [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Granted         63,994    
Granted, per share         $ 17.21    
Performance Shares [Member] | Maximum [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Granted, per share         $ 16.68    
Employee Stock Option [Member] | Certain Employees and Senior Officers [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Granted, options         137,847    
Grant date, value, per share         17.21    
Grants, options, per share         $ 7.99    
Fair value assumptions, risk free interest rate         2.36%    
Fair value assumptions, expected dividend rate         0.00%    
Fair value assumptions, expected volatility factor         0.46%    
Fair value assumptions, expected life         6 years    
Share-based Compensation Award, Tranche One [Member] | Performance Shares [Member] | February 14, 2017 [Member] | Executive Officer [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Granted   11,882          
Granted, per share   $ 17.21          
Management Incentive Compensation Plan [Member] | Time Based Restricted Stock [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Granted         63,998    
Granted, per share         $ 17.21    
Non-Employee Director Incentive Compensation Plan [Member] | Restricted Stock [Member] | Directors [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Granted         51,107    
Granted, per share         $ 18.00