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Benefit Plans (Tables)
 9 Months Ended
Sep. 29, 2018
Retirement Benefits [Abstract]  
Components of Net Periodic Benefit Cost (Income)
The components of net periodic benefit cost (income) are as follows:

 
 
For the Quarter Ended
 
For the Nine Months Ended
(In thousands) 
 
September 29, 2018
 
September 30, 2017
 
September 29, 2018
 
September 30, 2017
 
 
 
 
 
 
 
 
 
Pension benefits:
 
 
 
 
 
 
 
 
Service cost
 
$
22

 
$
35

 
$
66

 
$
106

Interest cost
 
1,478

 
1,659

 
4,436

 
4,977

Expected return on plan assets
 
(2,290
)
 
(2,184
)
 
(6,869
)
 
(6,552
)
Amortization of net loss
 
293

 
536

 
877

 
1,608

 
 
 
 
 
 
 
 
 
Net periodic benefit (income) cost
 
$
(497
)
 
$
46

 
$
(1,490
)
 
$
139

 
 
 
 
 
 
 
 
 
Other benefits:
 
 

 
 

 
 

 
 

Service cost
 
$
59

 
$
54

 
$
175

 
$
163

Interest cost
 
147

 
147

 
441

 
442

Amortization of prior service credit
 
(226
)
 
(225
)
 
(677
)
 
(676
)
Amortization of net loss (gain)
 
14

 
(10
)
 
43

 
(30
)
 
 
 
 
 
 
 
 
 
Net periodic benefit income
 
$
(6
)
 
$
(34
)
 
$
(18
)
 
$
(101
)