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Benefit Plans (Tables)
 9 Months Ended
Oct. 01, 2016
Benefit Plans [Abstract]  
Components of net periodic benefit costs (income)
The components of net periodic benefit cost (income) are as follows:

 
 
For the Quarter Ended
  
For the Nine Months Ended
 
(In thousands) 
 
October 1,
 2016
  
September 26, 2015
  
October 1,
 2016
  
September 26, 2015
 
    
Pension benefits:
            
Service cost
 
$
180
  
$
250
  
$
540
  
$
750
 
Interest cost
  
1,973
   
2,041
   
5,917
   
6,122
 
Expected return on plan assets
  
(2,466
)
  
(2,654
)
  
(7,398
)
  
(7,963
)
Amortization of net loss
  
760
   
685
   
2,280
   
2,055
 
                 
Net periodic benefit cost
 
$
447
  
$
322
  
$
1,339
  
$
964
 
                 
Other benefits:
                
Service cost
 
$
61
  
$
90
  
$
183
  
$
270
 
Interest cost
  
153
   
193
   
458
   
579
 
Amortization of prior service (credit) cost
  
(224
)
  
2
   
(672
)
  
5
 
Amortization of net gain
  
(9
)
  
(7
)
  
(27
)
  
(20
)
                 
Net periodic benefit (income) cost
 
$
(19
)
 
$
278
  
$
(58
)
 
$
834