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Defined Benefit Plans
9 Months Ended
Sep. 30, 2017
Defined Benefit Plan [Abstract]  
Defined Benefit Plans
Defined Benefit Plans
Net periodic pension benefit costs for the Company's defined benefit pension plans cover certain foreign employees, union hourly employees and salaried employees. The components of net periodic pension cost for the three and nine months ended September 30, 2017 and 2016 are as follows (dollars in thousands):
 
 
Pension Plans
 
 
Three months ended
September 30,
 
Nine months ended
September 30,
 
 
2017
 
2016
 
2017
 
2016
Service costs
 
$
290

 
$
250

 
$
840

 
$
740

Interest costs
 
310

 
390

 
950

 
1,180

Expected return on plan assets
 
(370
)
 
(420
)
 
(1,100
)
 
(1,260
)
Amortization of net loss
 
260

 
230

 
760

 
710

Net periodic benefit cost
 
$
490

 
$
450

 
$
1,450

 
$
1,370


The Company contributed approximately $1.7 million and $2.8 million to its defined benefit pension plans during the three and nine months ended September 30, 2017, respectively. The Company expects to contribute approximately $3.4 million to its defined benefit pension plans for the full year 2017.