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Investments (Tables)
6 Months Ended
Jun. 30, 2015
Investments, Debt and Equity Securities [Abstract]  
Investments
The Company’s investments, excluding cash surrender value of insurance contracts of $74.2 and $73.8 as of June 30, 2015 and December 31, 2014, respectively, consisted of the following:
 
 
Cost Basis
 
Unrealized Gain
 
Fair Value
As of June 30, 2015
 
 
 
 
 
 
Short-term investments
 
 
 
 
 
 
Certificates of deposit
 
$
119.5

 
$

 
$
119.5

Long-term investments
 
 
 
 
 
 
Assets held in a rabbi trust
 
$
9.0

 
$
0.6

 
$
9.6

 
 
 
 
 
 
 
As of December 31, 2014
 
 
 
 
 
 
Short-term investments
 
 
 
 
 
 
Certificates of deposit
 
$
136.7

 
$

 
$
136.7

Long-term investments
 
 
 
 
 
 
Assets held in a rabbi trust
 
$
9.3

 
$
0.5

 
$
9.8