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Net Periodic Benefit Cost (Tables)
 6 Months Ended
Jun. 30, 2017
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs [Table Text Block]
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 June 30:
 
U.S. Pension Benefits
 
Non-U.S. Pension Benefits
 
Other U.S. Post-retirement Benefits
 
Total
 
2017
 
2016
 
2017
 
2016
 
2017
 
2016
 
2017
 
2016
Service cost, net
$
141

 
$
145

 
$
3,952

 
$
4,153

 
$
—

 
$
—

 
4,093

 
4,298

Interest cost on projected benefit obligations
1,094

 
1,072

 
2,053

 
2,673

 
18

 
19

 
3,165

 
3,764

Expected return on plan assets
(1,684
)
 
(1,945
)
 
(7,629
)
 
(8,341
)
 
—

 
—

 
(9,313
)
 
(10,286
)
Recognition of prior service cost
—

 
—

 
(974
)
 
(1,278
)
 
(195
)
 
(469
)
 
(1,169
)
 
(1,747
)
Recognition of actuarial losses/(gains)
1,639

 
1,902

 
5,058

 
4,563

 
(474
)
 
(673
)
 
6,223

 
5,792

Settlement charge
—

 
7,963

 
—

 
—

 
—

 
—

 
—

 
7,963

Net periodic pension cost/(credit)
$
1,190

 
$
9,137

 
$
2,460

 
$
1,770

 
$
(651
)
 
$
(1,123
)
 
$
2,999

 
$
9,784



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 six months ended June 30:

 
U.S. Pension Benefits
 
Non-U.S. Pension Benefits
 
Other U.S. Post-retirement Benefits
 
Total
 
2017
 
2016
 
2017
 
2016
 
2017
 
2016
 
2017
 
2016
Service cost, net
$
282

 
$
262

 
$
7,976

 
$
8,383

 
$
—

 
$
—

 
8,258

 
8,645

Interest cost on projected benefit obligations
2,188

 
2,364

 
4,122

 
5,345

 
36

 
38

 
6,346

 
7,747

Expected return on plan assets
(3,368
)
 
(4,044
)
 
(15,014
)
 
(16,681
)
 
—

 
—

 
(18,382
)
 
(20,725
)
Recognition of prior service cost
—

 
—

 
(2,797
)
 
(2,556
)
 
(390
)
 
(938
)
 
(3,187
)
 
(3,494
)
Recognition of actuarial losses/(gains)
3,278

 
3,792

 
10,950

 
9,053

 
(948
)
 
(1,346
)
 
13,280

 
11,499

Settlement charge
—

 
7,963

 
—

 
—

 
—

 
—

 
—

 
7,963

Net periodic pension cost/(credit)
$
2,380

 
$
10,337

 
$
5,237

 
$
3,544

 
$
(1,302
)
 
$
(2,246
)
 
$
6,315

 
$
11,635