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Stock Plans (Narrative) (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
USD ($)
$ / shares
shares
Sep. 30, 2014
USD ($)
Sep. 30, 2015
USD ($)
$ / shares
item
shares
Sep. 30, 2014
USD ($)
Dec. 31, 2014
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of active share-based compensation plans | item     2    
Common stock, no par value | $ / shares    
Stock-Based Compensation Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of active share-based compensation plans | item     2    
Intrinsic value, amount per share | $ / shares $ 35.00   $ 35.00    
Allocated compensation expense $ 46 $ 45 $ 133 $ 129  
The 2012 Omnibus Stock Incentive Plan [Member] | Stock-Based Compensation Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares authorized | shares 500,000   500,000    
Allocated compensation expense $ 20 10 $ 53 29  
Director Stock Incentive Plan - 2012 [Member] | Stock-Based Compensation Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares authorized | shares 500,000   500,000    
Allocated compensation expense $ 26 $ 35 $ 80 100  
Employee Stock Purchase Plan [Member] | Employee Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares authorized | shares 110,000   110,000    
Number of shares issued | shares 38,687   38,687    
Allocated compensation expense     $ 44 $ 33