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Pensions and Other Post-retirement Benefits (Tables)
 6 Months Ended
Jun. 30, 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 June 30,
 
 
 
 
 
 
 
 
Service cost
 
$
2,891

 
$
2,721

 
$
83

 
$
106

Interest cost
 
4,219

 
4,572

 
175

 
237

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

 
—

Amortization of prior service cost
 
(6
)
 
(4
)
 
(125
)
 
(105
)
Recognized net actuarial losses
 
3,453

 
3,184

 
351

 
17

Settlements
 
27

 
34

 
141

 
—

Net periodic benefit cost (a)
 
1,488

 
1,769

 
625

 
255

 
 
 
 
 
 
 
 
 
Six Months Ended June 30,
 
 
 
 
 
 
 
 
Service cost
 
$
5,782

 
$
5,442

 
$
184

 
$
212

Interest cost
 
8,438

 
9,144

 
396

 
474

Expected return on plan assets
 
(18,193
)
 
(17,476
)
 
—

 
—

Amortization of prior service cost
 
(11
)
 
(8
)
 
(202
)
 
(210
)
Recognized net actuarial losses
 
6,907

 
6,368

 
376

 
34

Settlement/curtailment loss (credit)
 
53

 
68

 
—

 
—

Net periodic benefit cost, excluding below
 
2,976

 
3,538

 
754

 
510

Special termination charge
 
—

 
11,384

(b) 
—

 
—

Net periodic benefit cost (a)
 
2,976

 
14,922

 
754

 
510


(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—Restructuring Charges.