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Pension and Other Post-Retirement Benefit Plans
 3 Months Ended
Mar. 31, 2018
Retirement Benefits [Abstract]  
Pension and Other Post-Retirement Benefit Plans
Pension and Other Post-Retirement Benefit Plans
We sponsor pension and other post-retirement benefit plans that cover certain hourly and salaried employees in the United States and United Kingdom. Each of the plans are frozen to new participants. Our policy is to make annual contributions to the plans to fund the normal cost as required by local regulations.
The components of net periodic (benefit) cost related to pension and other post-retirement benefit plans is as follows:
 
U.S. Pension Plans and Other Post-Retirement Benefit Plans
 
Non-U.S. Pension Plans
 
Three Months Ended March 31,
 
Three Months Ended March 31,
 
2018
 
2017
 
2018
 
2017
Service cost
$
—

 
$
33

 
$
—

 
$
—

Interest cost
418

 
449

 
287

 
271

Expected return on plan assets
(787
)
 
(671
)
 
(335
)
 
(285
)
Amortization of prior service cost
2

 
2

 
—

 
—

Recognized actuarial loss
69

 
89

 
137

 
115

Net (benefit) cost
$
(298
)
 
$
(98
)
 
$
89

 
$
101

We expect to contribute approximately $3.1 million to our pension plans and our other post-retirement benefit plans in 2018. As of March 31, 2018, $0.8 million of contributions have been made.