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Net Periodic Benefit Cost
 6 Months Ended
Jun. 30, 2015
Compensation and Retirement Disclosure [Abstract]  
NET PERIODIC BENEFIT COST
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 June 30:
 
U.S. Pension Benefits
 
Non-U.S. Pension Benefits
 
Other U.S. Post-retirement Benefits
 
Total
 
2015
 
2014
 
2015
 
2014
 
2015
 
2014
 
2015
 
2014
Service cost, net
$
208

 
$
223

 
$
4,711

 
$
3,923

 
$
—

 
$
43

 
$
4,919

 
$
4,189

Interest cost on projected benefit obligations
1,608

 
1,599

 
3,515

 
5,519

 
35

 
60

 
5,158

 
7,178

Expected return on plan assets
(2,394
)
 
(2,137
)
 
(9,340
)
 
(9,596
)
 
—

 
—

 
(11,734
)
 
(11,733
)
Recognition of prior service cost
—

 
—

 
(984
)
 
(1,030
)
 
(469
)
 
(195
)
 
(1,453
)
 
(1,225
)
Recognition of actuarial losses/(gains)
1,907

 
1,200

 
3,817

 
1,100

 
(843
)
 
(358
)
 
4,881

 
1,942

Net periodic pension cost/(credit)
$
1,329

 
$
885

 
$
1,719

 
$
(84
)
 
$
(1,277
)
 
$
(450
)
 
$
1,771

 
$
351



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
 
2015
 
2014
 
2015
 
2014
 
2015
 
2014
 
2015
 
2014
Service cost, net
$
417

 
$
446

 
$
9,456

 
$
7,885

 
$
—

 
$
85

 
$
9,873

 
$
8,416

Interest cost on projected benefit obligations
3,216

 
3,198

 
7,069

 
11,002

 
69

 
120

 
10,354

 
14,320

Expected return on plan assets
(4,788
)
 
(4,274
)
 
(18,639
)
 
(19,140
)
 
—

 
—

 
(23,427
)
 
(23,414
)
Recognition of prior service cost
—

 
—

 
(1,957
)
 
(2,070
)
 
(938
)
 
(389
)
 
(2,895
)
 
(2,459
)
Recognition of actuarial losses/(gains)
3,814

 
2,400

 
7,635

 
2,206

 
(1,685
)
 
(718
)
 
9,764

 
3,888

Net periodic pension cost/(credit)
$
2,659

 
$
1,770

 
$
3,564

 
$
(117
)
 
$
(2,554
)
 
$
(902
)
 
$
3,669

 
$
751



As previously disclosed in the Company's Annual Report on Form 10-K for the year ended December 31, 2014, the Company expects to make employer contributions of approximately $19.6 million to its non-U.S. pension plans and employer contributions of approximately $0.7 million to its U.S. post-retirement medical plan during the year ended December 31, 2015. These estimates may change based upon several factors, including fluctuations in currency exchange rates, actual returns on plan assets and changes in legal requirements.