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RETIREMENT AND POSTRETIREMENT BENEFIT PLANS
 3 Months Ended
Mar. 31, 2018
Retirement Benefits [Abstract]  
RETIREMENT AND POSTRETIREMENT BENEFIT PLANS
RETIREMENT AND POSTRETIREMENT BENEFIT PLANS
The components of total pension cost were as follows:
 
Three Months Ended March 31,
 
2018
 
2017
 
U.S. pension plans
 
Non-U.S. pension plans
 
U.S. pension plans
 
Non-U.S. pension plans
Service cost
$
35

 
$
851

 
$
150

 
$
584

Interest cost
4,494

 
970

 
4,870

 
662

Expected return on plan assets
(6,916
)
 
(1,274
)
 
(7,671
)
 
(944
)
Amortization of prior service cost
—

 
1

 
—

 
4

Amortization of net loss
384

 
575

 
547

 
453

Settlement charges (1)
758

 
—

 
—

 
—

Defined benefit plans
(1,245
)
 
1,123

 
(2,104
)
 
759

Multi-employer plans
—

 
227

 
—

 
193

Defined contribution plans
5,894

 
829

 
6,398

 
366

Total pension cost
$
4,649

 
$
2,179

 
$
4,294

 
$
1,318



(1)
Pension settlement charges resulting from a lump sum pension payment in the three months ended March 31, 2018.
The defined benefit plan components of Total pension cost, other than service cost, are included Other income (expense) in the Company's Consolidated Statements of Income.