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Pension And Severance Benefits
6 Months Ended
Jun. 30, 2012
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]  
Pension And Severance Benefits
Pension and Severance Benefits
Net pension expense from the company's defined benefit and severance plans is primarily comprised of severance plans covering Central American employees and consists of the following: 
 
Quarter ended June 30,
 
Six months ended June 30,
(In thousands)
2012
 
2011
 
2012
 
2011
Service cost
$
1,765

 
$
1,690

 
$
3,573

 
$
3,379

Interest on projected benefit obligation
1,208

 
1,350

 
2,499

 
2,695

Expected return on plan assets
(326
)
 
(401
)
 
(755
)
 
(801
)
Recognized actuarial loss
250

 
200

 
467

 
399

Amortization of prior service cost
16

 
32

 
64

 
64

Defined benefit and severance plan expense
$
2,913

 
$
2,871

 
$
5,848

 
$
5,736