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Stock-Based Compensation (Narrative) (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
USD ($)
shares
Jun. 30, 2017
USD ($)
shares
Jun. 30, 2018
USD ($)
ShareBasedCompensationPlan
shares
Jun. 30, 2017
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of stock-based compensation plans | ShareBasedCompensationPlan     2  
Compensation cost | $ $ 96 $ 62 $ 192 $ 122
Total income tax effect recognized for share-based compensation arrangements | $ $ 20 $ 21 $ 40 $ 42
Shares available to be issued 1,500,000   1,500,000  
Shares expired     400 300
Shares cancelled or forfeited     0  
Nonvested stock options, expected to vest    
2003 Equity Compensation Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of Shares Authorized 100,000   100,000  
2009 Equity Compensation Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 391,514   391,514  
Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expiration period     10 years  
Shares Granted 0 0 0 0
Stock Options Exercised 0 0 0 0
Stock Options [Member] | Minimum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting periods     1 year  
Stock Options [Member] | Maximum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting periods     3 years  
Restricted Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation cost | $ $ 642 $ 511 $ 642 $ 511
Nonvested shares, granted     4,000 0
Shares, Forfeited     43,999 6,333
Shares, Vested     0 0
Restricted Stock [Member] | 2003 Equity Compensation Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of Shares Authorized 30,000   30,000  
Restricted Stock [Member] | 2009 Equity Compensation Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of Shares Authorized 200,000   200,000  
Restricted Stock [Member] | Minimum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting periods     1 year  
Restricted Stock [Member] | Maximum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting periods     3 years