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Pensions and Other Post-retirement Benefits (Tables)
 3 Months Ended
Mar. 31, 2018
Retirement Benefits [Abstract]  
Components of Net Periodic Benefit Cost
Components of net periodic benefit cost consisted of the following:
 
 
Pension Benefits
 
Other Benefits
(In thousands)
 
2018
 
2017
 
2018
 
2017
Three Months Ended March 31,
 
 
 
 
 
 
 
 
Service cost
 
$
2,891

 
$
2,721

 
$
101

 
$
106

Interest cost
 
4,219

 
4,572

 
221

 
237

Expected return on plan assets
 
(9,096
)
 
(8,738
)
 
—

 
—

Amortization of prior service cost
 
(6
)
 
(4
)
 
(77
)
 
(105
)
Recognized net actuarial losses
 
3,453

 
3,184

 
25

 
17

Settlement/curtailment loss (credit)
 
27

 
34

 
(141
)
 
—

Net periodic benefit cost, excluding below
 
1,488

 
1,769

 
129

 
255

Special termination charge
 
—

 
11,384

(b) 
—

 
—

Net periodic benefit cost (a)
 
1,488

 
13,153

 
129

 
255


(a) Components of net periodic benefit cost other than service cost are included in the line item "Other income, net" in the income statement.
(b) Represents the charge for special termination benefits related to the VRIP which were paid from our over funded North America pension plan and recorded as restructuring charges on the Condensed Consolidated Statement of Income. See further details in Note 5.