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Common Stock
 12 Months Ended
Dec. 31, 2018
Equity [Abstract]  
Common Stock
Common Stock
There were approximately 3,578 and 3,691 common shares outstanding at December 31, 2018 and 2017, respectively. The Company made the following share repurchases during the years indicated:

 
 
Year Ended December 31,
 
 
2018
 
2017
 
2016
Aggregate purchase price
 
$
846,134

 
$
422,166

 
$
455,351

Number of shares repurchased
 
301

 
167

 
280



The Company issues shares from the treasury account for all equity plan activity. The Company issued 188, 165 and 83 such shares during 2018, 2017 and 2016, respectively.