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Stock-based Compensation (Narrative) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares authorized for issuance 1,500,000    
Total unrecognized compensation expense $ 55 $ 55 $ 316
Share-Based Compensation 1,795 1,398 1,391
Restricted Stock [Member]
      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares granted 30,407 28,370 31,472
Shares granted, weighted average grant date market value   $ 34.03 $ 30.05
Vesting period 3 years    
Amortization of restricted stock bonus 1,176 788 787
Total unrecognized compensation expense 1,131    
Total unrecognized compensation expense, weighted average period 7 months 21 days    
Total fair value of shares vested 822 788 812
SARs [Member]
      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares granted 85,943    
Shares granted, weighted average grant date market value $ 10.69    
Total unrecognized compensation expense 945    
Total unrecognized compensation expense, weighted average period 1 year 1 month 17 days    
Total intrinsic value of options exercised 2,328 1,769  
Non-qualified options exercised 94,379    
Stock option expense 800    
Average remaining contractual term 7 years 3 months 29 days 7 years 3 months 30 days  
Outstanding, Aggregate Intrinsic Value $ 12,137 $ 4,988