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Share-Based Payments (Tables)
9 Months Ended
Sep. 30, 2015
Equity [Abstract]  
Schedule of Nonvested Option Activity
             Weighted Average  
     Number of Shares      Grant Date Fair Value  
Nonvested options – beginning of period   385,505     $ 7.14  
Nonvested options granted   14,000     $ 6.73  
Nonvested options vested or forfeited   (9,935 )   $ 6.80  
Nonvested options – end of period     389,570     $ 7.14  
Schedule of Stock Option Activity
          Weighted Average  
         Shares          Exercise Price  
           
Outstanding at January 1, 2015 639,495     $ 23.19  
Options granted 14,000       25.67  
Options cancelled     (4,700 )     27.51  
Options exercised     (27,915 )     16.18  
                  
Outstanding at September 30, 2015     620,880     $ 23.53  
                  
Options exercisable     231,310     $ 18.76  
Options available for future grants     319,235           
Summary of Options Exercised
    September 30,     September 30,  
(In thousands)   2015     2014  
       
Cash proceeds from stock options exercised $ 451     $  861  
Tax benefits            
Intrinsic value of stock options exercised     482        1,631  
Schedule of Assumptions Used to Estimate Fair Value of Stock Options
    September 30,     September 30,  
    2015     2014  
       
Weighted average expected stock-price volatility 34 %     37 %
Weighted average expected option life 5 years       5 years  
Weighted average risk-free interest rate     1.28 %     1.60 %
Weighted average dividend yield     1.8 %     2.4 %