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Pension and Other Postretirement Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2014
Components Of Net Periodic Cost
The components of net periodic cost are as follows:
 
Three Months Ended March 31, 2014
(in thousands)
Pension Benefits
 
Other
Postretirement
Benefits
 
2014
 
2013
 
2014
 
2013
Service cost
$
1,258

 
$
1,529

 
$
17

 
$
27

Interest cost
10,234

 
9,410

 
101

 
125

Expected return on plan assets
(15,713
)
 
(13,212
)
 
—

 
—

Amortization of prior service cost
30

 
(6
)
 
(59
)
 
(59
)
Amortization of net loss (gain)
1,257

 
3,164

 
(33
)
 
(35
)
Net periodic cost
$
(2,934
)
 
$
885

 
$
26

 
$
58