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Employee Benefit Plans
 3 Months Ended
Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract]  
Employee Benefit Plans
Employee Benefit Plans
The Company has a frozen defined benefit pension plan that covers certain U.S. hourly and salaried employees. The defined benefit plan provides benefits based primarily on the participants’ years of service and compensation.
The components of net periodic pension expense are as follows:
 
Three Months Ended March 31,
 
2017
 
2016
Interest cost
$
542

 
$
571

Expected return on plan assets
(698
)
 
(697
)
Amortization of net loss
310

 
384

Total net periodic pension expense
$
154

 
$
258



The Company’s funding policy is to contribute at least the minimum funding amounts required by law. Based upon current actuarial estimates, the Company does not expect to contribute to its defined benefit pension plan until 2018.