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Employee Benefit Plans (Tables)
 6 Months Ended
Jun. 30, 2015
Compensation and Retirement Disclosure [Abstract]  
Components of net periodic benefit cost
Components of net periodic benefit cost/(credit) were as follows:
 
Three months ended June 30,
 
Six months ended June 30,
 
2015
 
2014
 
2015
 
2014
 
(In thousands)
Pension Benefits
 
 
 
 
 
 
 
Company-administered plans:
 
 
 
 
 
 
 
Service cost
$
3,566

 
3,171

 
$
7,193

 
6,594

Interest cost
22,048

 
25,135

 
43,935

 
50,696

Expected return on plan assets
(25,021
)
 
(29,284
)
 
(49,921
)
 
(58,002
)
Amortization of:
 
 
 
 
 
 
 
Net actuarial loss
7,664

 
5,579

 
15,472

 
11,814

Prior service credit
(74
)
 
(435
)
 
(150
)
 
(893
)
 
8,183

 
4,166

 
16,529

 
10,209

Union-administered plans
2,113

 
2,123

 
4,285

 
4,214

Net periodic benefit cost
$
10,296

 
6,289

 
$
20,814

 
14,423

 
 
 
 
 
 
 
 
Company-administered plans:
 
 
 
 
 
 
 
U.S.
$
8,599

 
4,499

 
$
17,491

 
10,786

Non-U.S.
(416
)
 
(333
)
 
(962
)
 
(577
)
 
8,183

 
4,166

 
16,529

 
10,209

Union-administered plans
2,113

 
2,123

 
4,285

 
4,214

 
$
10,296

 
6,289

 
$
20,814

 
14,423

 
 
 
 
 
 
 
 
Postretirement Benefits
 
 
 
 
 
 
 
Company-administered plans:
 
 
 
 
 
 
 
Service cost
$
79

 
89

 
$
190

 
224

Interest cost
275

 
348

 
559

 
713

Amortization of:
 
 
 
 
 
 
 
Net actuarial gain
(278
)
 
(234
)
 
(474
)
 
(363
)
Prior service credit
(478
)
 
(615
)
 
(956
)
 
(1,230
)
Net periodic benefit credit
$
(402
)
 
(412
)
 
$
(681
)
 
(656
)
 
 
 
 
 
 
 
 
Company-administered plans:
 
 
 
 
 
 
 
U.S.
$
(531
)
 
(524
)
 
$
(946
)
 
(921
)
Non-U.S.
129

 
112

 
265

 
265

 
$
(402
)
 
(412
)
 
$
(681
)
 
(656
)