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EMPLOYEE BENEFIT PLANS (Tables)
3 Months Ended
Mar. 31, 2018
Retirement Benefits [Abstract]  
Components of net periodic benefit cost
Components of net pension expense were as follows:
 
Three months ended March 31,
 
2018
 
2017
 
(In thousands)
Pension Benefits
 
 
 
Company-administered plans:
 
 
 
Service cost
$
3,201

 
3,249

Interest cost
19,752

 
21,489

Expected return on plan assets
(25,834
)
 
(22,478
)
Amortization of:
 
 
 
Net actuarial loss
7,372

 
8,450

Prior service cost
145

 
145

 
4,636

 
10,855

Union-administered plans
2,346

 
2,502

Net pension expense
$
6,982

 
13,357

 
 
 
 
Company-administered plans:
 
 
 
U.S.
$
7,357

 
11,311

Non-U.S.
(2,721
)
 
(456
)
 
4,636

 
10,855

Union-administered plans
2,346

 
2,502

Net pension expense
$
6,982

 
13,357