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Share-Based Payment Arrangements (Narrative) (Details)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
item
$ / shares
shares
Dec. 31, 2018
USD ($)
$ / shares
shares
Dec. 31, 2017
$ / shares
Dec. 31, 2016
$ / shares
Dec. 31, 2015
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock options, Granted | shares 0 0      
Long Term Incentive Plan 2005 [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of incentive stock options outstanding | shares 0        
Share-based compensation arrangement by share-based payment award, non-qualified stock options to purchase number of shares | shares 14,157        
Long-Term Incentive Plan 2015 [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation arrangement by share-based payment award, number of shares authorized | shares 2,000,000        
Share-based compensation arrangement by share-based payment award, restricted stock options to purchase number of shares | shares 530,236        
Stock options, Granted | shares 0        
Long Term Incentive Plan 2005 and 2015 [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized compensation cost related to non-vested share-based compensation arrangements $ 0        
Non Qualified Stock Options [Member] | Long Term Incentive Plan 2005 [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage 100.00%        
Stock-based compensation incentive stock options grant under incentive plan termination period 10 years        
Share-based payment, award vesting period 6 months        
Non Qualified Stock Options [Member] | Long Term Incentive Plan 2005 [Member] | First Seven Anniversary Dates [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of anniversary dates | item 7        
Non Qualified Stock Options [Member] | Long Term Incentive Plan 2005 [Member] | Two Hundred Thousand Grant [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of options vested or expected to vest | shares 200,000        
Restricted Stock Units (RSUs) [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized compensation cost related to non-vested share-based compensation arrangements $ 2,400        
Allocated share-based compensation expense 887 $ 152      
Income tax benefit of share-based payments recognized in income 186 $ 32      
Employee Service Share-based Compensation Nonvested Awards, Total Compensation Cost Expected to Recognized 2,400        
2020 1,400        
2021 800        
2022 $ 200        
Restricted Stock Units (RSUs) [Member] | Minimum [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Percentage of restricted stock units granted as result of meeting growth rates 50.00%        
Restricted Stock Units (RSUs) [Member] | Maximum [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Percentage of restricted stock units granted as result of meeting growth rates 150.00%        
Restricted Stock Units (RSUs) [Member] | Long-Term Incentive Plan 2015 [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Other than options, grant date fair value | $ / shares $ 18.10 $ 10.87 $ 10.20 $ 11.41 $ 11.10