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Stock Based Compensation (Tables)
 3 Months Ended
Mar. 31, 2014
Stock Based Compensation [Abstract]  
Assumptions used to estimate fair value of options granted
The following assumptions were used to estimate the fair value of options and stock appreciation rights granted during the three-month period ended March 31, 2013, using the Black-Scholes option-pricing model.

   
Three Months Ended
    
   
March 31, 2013
    
        
Expected dividend yield
      2.84 
%
 
Expected stock price volatility
      56.36 
%
 
Risk-free interest rate
      1.26 
%
 
Weighted-average expected life of options
      6.47 
years
 
Forfeiture rate
      2.50 
%