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Stock-based Compensation (Tables)
12 Months Ended
Dec. 31, 2015
Stock-based Compensation [Abstract]  
Schedule of Restricted Stock Activity
Weighted Average
Grant Date
Shares Fair Value
Balance at December 31, 2014 51,161     $ 48.13
       Granted 42,786     $ 51.04
       Vested (24,644 )   $ 44.18
Forfeited (262   $ 52.63
Balance at December 31, 2015 69,041     $ 51.33
Schedule of SARs Activity
SARs   Weighted Average Exercise Price
Balance at December 31, 2014 353,955     $ 35.52
       Exercised (45,428   $ 27.92
       Forfeited (1,204 )   $ 53.96
Balance at December 31, 2015   307,323     $ 36.57
Exercisable at December 31, 2015   254,816     $ 33.56