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Investments (Tables)
3 Months Ended
Mar. 31, 2016
Investments, Debt and Equity Securities [Abstract]  
Investments
The Company’s investments, excluding cash surrender value of insurance contracts of $74.9 and $75.9 as of March 31, 2016 and December 31, 2015, respectively, consisted of the following:
 
 
Cost Basis
 
Unrealized Gain
 
Fair Value
As of March 31, 2016
 
 
 
 
 
 
Short-term investments
 
 
 
 
 
 
Certificates of deposit
 
$
49.7

 
$

 
$
49.7

Long-term investments
 
 
 
 
 
 
Assets held in a rabbi trust
 
$
7.9

 
$
0.2

 
$
8.1

 
 
 
 
 
 
 
As of December 31, 2015
 
 
 
 
 
 
Short-term investments
 
 
 
 
 
 
Certificates of deposit
 
$
39.9

 
$

 
$
39.9

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

 
$

 
$
9.3