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Weighted-Average Number of Shares Used in Computing Earnings Per Share (Details) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Earnings Per Share [Abstract]        
Weighted average basic shares outstanding 12,230,100 12,086,973 12,198,169 12,055,678
Plus dilutive impact of employee stock awards 197,295 285,216 230,321 299,743
Weighted average diluted shares outstanding 12,427,395 12,372,189 12,428,490 12,355,421