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Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2013
Stockholders' Equity Note [Abstract]  
Schedule of recent share repurchase activity
A summary of the Company's recent share repurchase activity is as follows:
Period
 
Shares
Repurchased
 
Average
Price
2011
 
0.7

 
$
83.63

2012
 
0.6

 
$
107.44

2013
 
0.1

 
$
184.89