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Benefit Plans (Tables)
 6 Months Ended
Jul. 02, 2016
Benefit Plans [Abstract]  
Components of net periodic benefit costs
The components of net periodic benefit cost are as follows:

 
 
For the Quarter Ended
  
For the Six Months Ended
 
(In thousands)
 
July 2,
2016
  
June 27,
 2015
  
July 2,
2016
  
June 27,
 2015
 
 
   
Pension benefits:
            
    Service cost
 
$
165
  
$
228
  
$
360
  
$
500
 
    Interest cost
  
1,969
   
2,027
   
3,944
   
4,081
 
    Expected return on plan assets
  
(2,466
)
  
(2,655
)
  
(4,932
)
  
(5,309
)
    Amortization of net loss
  
746
   
656
   
1,520
   
1,370
 
 
                
Net periodic benefit cost
 
$
414
  
$
256
  
$
892
  
$
642
 
 
                
Other benefits:
                
    Service cost
 
$
60
  
$
84
  
$
122
  
$
180
 
    Interest cost
  
149
   
190
   
305
   
386
 
    Amortization of prior service (credit) cost
  
(224
)
  
1
   
(448
)
  
3
 
    Amortization of net gain
  
(20
)
  
(16
)
  
(18
)
  
(13
)
 
                
Net periodic benefit (income) cost
 
$
(35
)
 
$
259
  
$
(39
)
 
$
556