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Stock-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] The fair value of share-based payment awards was estimated using the Black-Scholes option pricing model with the following assumptions and weighted average fair values at the time the grants were awarded:

    Six Months Ended
June 30,
 
    2014   2013  
Weighted average fair value of grants     n/a     $ 2.50  
Risk-free interest rate     n/a       1.86 %
Dividend yield     n/a       1.76 %
Expected volatility     n/a       23.21 %
Expected life in months     n/a       69  
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] Activity under the stock-based compensation plans as of June 30, 2014 and changes during the sixth months ended June 30, 2014 were as follows:

    Shares     Weighted-
Average
Exercise
Price
    Weighted-
Average
Remaining
Contractual
Term (Years)
    Aggregate
Intrinsic
Value
 
Outstanding at December 31, 2013     214,263     $ 10.59                  
Granted – options                              
Exercised     44,478     $ 10.78                  
Canceled/expired                              
Forfeited                              
Outstanding at June 30, 2014     169,785     $ 10.54       5.96     $ 1,474,951  
Exercisable at June 30, 2014     120,343     $ 10.05       5.01     $ 1,105,335