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Pension and Other Postretirement Benefits
3 Months Ended
Mar. 31, 2019
Retirement Benefits [Abstract]  
Pension and Other Postretirement Benefits
Pension and Other Postretirement Benefits

Pension and other postretirement benefits expenses consisted of the following:
 
Three months ended March 31,
Pensions
2019
 
2018
Service cost
$
1,433

 
$
1,590

Interest cost
4,536

 
4,309

Expected return on plan assets
(7,078
)
 
(7,394
)
Amortization of prior service cost
103

 
141

Amortization of actuarial losses
2,158

 
2,811

Net periodic benefit cost
$
1,152

 
$
1,457

 
 
 
 

 
Three months ended March 31,
Other Postretirement Benefits
2019
 
2018
Service cost
$
19

 
$
24

Interest cost
340

 
344

Amortization of prior service cost
6

 
5

Amortization of actuarial losses
10

 
160

Net periodic benefit cost
$
375

 
$
533



The service cost component of net periodic benefit cost is included within cost of sales and selling and administrative expenses. The components of net periodic benefit cost other than the service cost component are included in Other Income (Expense) on the Consolidated Statements of Income.