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RETIREMENT AND POSTRETIREMENT BENEFIT PLANS (Tables)
 6 Months Ended
Jun. 30, 2016
Compensation and Retirement Disclosure [Abstract]  
Components of total pension cost
The components of total pension cost were as follows:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Service cost
$
4,439

 
$
5,038

 
$
8,869

 
$
10,460

Interest cost
6,018

 
10,413

 
12,029

 
20,744

Expected return on plan assets
(8,894
)
 
(16,242
)
 
(17,758
)
 
(31,980
)
Amortization of prior service cost
(99
)
 
(156
)
 
(198
)
 
(312
)
Amortization of net loss
3,648

1 
5,872

 
6,314

1 
11,692

Defined benefit plans
5,112

 
4,925

 
9,256

 
10,604

Multi-employer plans
193

 
211

 
395

 
428

Defined contribution plans
2,192

 
2,945

 
4,161

 
5,961

Total pension cost
$
7,497

 
$
8,081

 
$
13,812

 
$
16,993



1
The amortization of net loss includes a $959 charge resulting from the deconsolidation of the Venezuelan subsidiary during the three and six months ended June 30, 2016.