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Employee Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]  
Components of net periodic benefit cost
Components of net periodic benefit cost were as follows:
 
Pension Benefits
 
Postretirement Benefits
 
Three months ended March 31,
 
2015
 
2014
 
2015
 
2014
 
(In thousands)
Company-administered plans:
 
 
 
 
 
 
 
Service cost
$
3,627

 
3,423

 
$
111

 
135

Interest cost
21,887

 
25,561

 
284

 
365

Expected return on plan assets
(24,900
)
 
(28,718
)
 
—

 
—

Amortization of:
 
 
 
 
 
 
 
Net actuarial loss/(gain)
7,808

 
6,235

 
(196
)
 
(129
)
Prior service credit
(76
)
 
(458
)
 
(478
)
 
(615
)
 
8,346

 
6,043

 
(279
)
 
(244
)
Union-administered plans
2,172

 
2,091

 
—

 
—

Net periodic benefit cost
$
10,518

 
8,134

 
$
(279
)
 
(244
)
 
 
 
 
 
 
 
 
Company-administered plans:
 
 
 
 
 
 
 
U.S.
$
8,892

 
6,287

 
$
(415
)
 
(397
)
Non-U.S.
(546
)
 
(244
)
 
136

 
153

 
8,346

 
6,043

 
(279
)
 
(244
)
Union-administered plans
2,172

 
2,091

 
—

 
—

 
$
10,518

 
8,134

 
$
(279
)
 
(244
)