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Employee Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2016
Compensation and Retirement Disclosure [Abstract]  
Combined Amount of Net Periodic Benefit Cost Recognizedd
The following table sets forth the combined amount of net periodic benefit cost recognized for the three months ended March 31, 2016 and 2015:
 
 
Three Months Ended 
 March 31,
 
 
2016
 
2015
Components of net periodic pension benefit cost:
 
 

 
 

Service cost
 
$
0.6

 
$
0.7

Interest cost
 
1.2

 
1.2

Expected return on plan assets
 
(1.6
)
 
(1.7
)
Amortization of actuarial losses
 
0.2

 
0.3

Amortization of unrecognized prior service cost
 
(0.1
)
 
—

Net periodic cost
 
$
0.3

 
$
0.5