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Share-Based Payments (Tables)
9 Months Ended
Sep. 30, 2014
Share-Based Payments [Abstract]  
Schedule of Nonvested Option Activity
          Weighted Average  
    Number of Shares     Grant  Date Fair Value  
Nonvested options – beginning of period     367,470     $ 6.68  
Nonvested options granted     5,500     $ 8.47  
Nonvested options vested or forfeited     (10,635 )   $ 5.74  
Nonvested options – end of period     362,335     $ 6.73  
Schedule of Stock Option Activity
          Weighted Average  
    Shares     Exercise Price  
             
Outstanding at January 1, 2014                     643,595     $ 19.58  
Options granted     5,500       31.12  
Options cancelled     (5,210 )     19.31  
Options exercised     (90,720 )     12.95  
                 
Outstanding at September 30, 2014     553,165     $ 20.78  
                 
Options exercisable     190,830     $ 14.30  
Options available for future grants     460,785          
Summary of Options Exercised
(In thousands)   September 30,     September 30,  
    2014     2013  
             
Cash proceeds from stock options exercised   $ 861     $ 1,319  
Tax benefits           317  
Intrinsic value of stock options exercised                        1,631                        1,963     
Schedule of Assumptions Used to Estimate Fair Value of Stock Options
    September 30,     September 30,  
    2014     2013  
             
Weighted-average expected stock-price volatility     37 %     38 %
Weighted-average expected option life     5 years       5 years  
Weighted-average risk-free interest rate     1.60 %     0.89 %
Weighted-average dividend yield                        2.4 %                  2.0 %