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Acquisitions (Tables)
9 Months Ended
Sep. 30, 2015
Business Combinations [Abstract]  
Schedule of identifiable intangible assets
The acquired identifiable intangible assets of Farmer Automatic as of the date of the acquisition are summarized in the following table (in millions):
Intangible Asset
 
Amount
 
Weighted-Average
Useful Life
Customer relationships
 
$
4.1

 
10
years
Technology
 
3.6

 
10
years
Trademarks
 
1.9

 
10
years
 
 
$
9.6