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Retirement Plans (Tables)
 9 Months Ended
Sep. 30, 2013
Retirement Plans [Abstract]  
Components of annual benefit cost
The Company’s components of annual benefit cost for the defined benefit plans for the periods presented are as follows:

 
 
Three Months Ended
September 30,
  
Nine Months Ended
September 30,
 
(In thousands)
 
2013
  
2012
  
2013
  
2012
 
 
 
  
  
  
 
Service cost
 
$
752
  
$
637
  
$
2,265
  
$
1,908
 
Interest cost
  
599
   
678
   
1,803
   
2,030
 
Expected return on plan assets
  
(362
)
  
(360
)
  
(1,089
)
  
(1,077
)
Amortization of prior service cost
  
43
   
493
   
129
   
1,479
 
Amortization of actuarial loss
  
798
   
190
   
2,397
   
567
 
 
                
Defined benefit expense
 
$
1,830
  
$
1,638
  
$
5,505
  
$
4,907