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Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2018
Compensation and Retirement Disclosure [Abstract]  
Components of Net Periodic Benefit Cost (Income)
The components of net periodic benefit cost (income) are as follows:

 
 
For the Quarter Ended
(In thousands) 
 
March 31, 2018
 
April 1,
2017
 
 
 
 
 
Pension benefits:
 
 
 
 
Service cost
 
$
24

 
$
35

Interest cost
 
1,493

 
1,665

Expected return on plan assets
 
(2,289
)
 
(2,182
)
Amortization of net loss
 
349

 
556

 
 
 
 
 
Net periodic benefit (income) cost
 
$
(423
)
 
$
74

 
 
 
 
 
Other benefits:
 
 

 
 

Service cost
 
$
60

 
$
56

Interest cost
 
148

 
149

Amortization of prior service credit
 
(226
)
 
(225
)
Amortization of net loss (gain)
 
18

 
(5
)
 
 
 
 
 
Net periodic benefit income
 
$
—

 
$
(25
)