XML 30 R31.htm IDEA: XBRL DOCUMENT v2.4.0.8
Stock-Based Compensation (Summary of Stock Option Activity) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 9 Months Ended 12 Months Ended
Sep. 30, 2014
Dec. 31, 2013
Sep. 30, 2013
Stock-Based Compensation [Abstract]      
Options, Outstanding, beginning of year 219,540    
Options, Granted 0    
Options, Exercised (8,278)    
Options, Outstanding, end of year 211,262 219,540  
Options, Exercisable, end of year 183,762    
Weighted Average Exercise Price Per Share, Outstanding, beginning of year $ 26.64    
Weighted Average Exercise Price Per Share, Exercised $ 27.49    
Weighted Average Exercise Price Per Share, Outstanding, end of year $ 26.61 $ 26.64  
Weighted Average Exercise Price Per Share, Exercisable, end of year $ 26.54    
Weighted Average Remaining Contractual Term, Outstanding, 5 years 3 months 18 days 6 years 1 month 6 days  
Weighted Average Remaining Contractual Term, Exercised During Period 3 years 3 months 18 days    
Weighted Average Remaining Contractual Term, Outstanding, 5 years 3 months 18 days 6 years 1 month 6 days  
Weighted Average Remaining Contractual Term, Exercisable at End of Period 4 years 9 months 18 days    
Aggregate Intrinsic Value, Outstanding, $ 147    
Aggregate Intrinsic Value, Exercised in Period 15    
Aggregate Intrinsic Value, Outstanding, end of year 422 147  
Aggregate Intrinsic Value, Exercisable, end of year 379    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options $ 37    
Share Price $ 28.60 $ 26.90 $ 28.95