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Net Periodic Benefit Cost (Tables)
 9 Months Ended
Sep. 30, 2016
Defined Benefit Plan Disclosure [Line Items]  
Net periodic benefit cost
Net periodic pension cost for the Company’s defined benefit pension plans and U.S. post-retirement medical plan includes the following components for the three months ended September 30:
 
U.S. Pension Benefits
 
Non-U.S. Pension Benefits
 
Other U.S. Post-retirement Benefits
 
Total
 
2016
 
2015
 
2016
 
2015
 
2016
 
2015
 
2016
 
2015
Service cost, net
$
103

 
$
211

 
$
4,216

 
$
4,772

 
$
—

 
$
—

 
$
4,319

 
$
4,983

Interest cost on projected benefit obligations
1,014

 
1,607

 
2,542

 
3,554

 
19

 
35

 
3,575

 
5,196

Expected return on plan assets
(1,868
)
 
(2,395
)
 
(8,177
)
 
(9,228
)
 
—

 
—

 
(10,045
)
 
(11,623
)
Recognition of prior service cost
—

 
—

 
(1,288
)
 
(1,675
)
 
(469
)
 
(469
)
 
(1,757
)
 
(2,144
)
Recognition of actuarial losses/(gains)
1,907

 
1,906

 
4,519

 
3,756

 
(673
)
 
(843
)
 
5,753

 
4,819

Net periodic pension cost/(credit)
$
1,156

 
$
1,329

 
$
1,812

 
$
1,179

 
$
(1,123
)
 
$
(1,277
)
 
$
1,845

 
$
1,231



Net periodic pension cost for the Company’s defined benefit pension plans and U.S. post-retirement medical plan includes the following components for the nine months ended September 30:

 
U.S. Pension Benefits
 
Non-U.S. Pension Benefits
 
Other U.S. Post-retirement Benefits
 
Total
 
2016
 
2015
 
2016
 
2015
 
2016
 
2015
 
2016
 
2015
Service cost, net
$
328

 
$
628

 
$
12,606

 
$
14,228

 
$
—

 
$
—

 
$
12,934

 
$
14,856

Interest cost on projected benefit obligations
3,414

 
4,823

 
7,967

 
10,623

 
57

 
104

 
11,438

 
15,550

Expected return on plan assets
(5,912
)
 
(7,183
)
 
(25,020
)
 
(27,867
)
 
—

 
—

 
(30,932
)
 
(35,050
)
Recognition of prior service cost
—

 
—

 
(3,856
)
 
(3,632
)
 
(1,408
)
 
(1,408
)
 
(5,264
)
 
(5,040
)
Recognition of actuarial losses/(gains)
5,699

 
5,720

 
13,585

 
11,393

 
(2,019
)
 
(2,528
)
 
17,265

 
14,585

Settlement charge
7,963

 
—

 
—

 
—

 
—

 
—

 
7,963

 
—

Net periodic pension cost/(credit)
$
11,492

 
$
3,988

 
$
5,282

 
$
4,745

 
$
(3,370
)
 
$
(3,832
)
 
$
13,404

 
$
4,901