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Benefit Plans (Tables)
 9 Months Ended
Sep. 30, 2017
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
 
For the Nine Months Ended
(In thousands) 
 
September 30, 2017
 
October 1, 2016
 
September 30, 2017
 
October 1, 2016
 
 
 
 
 
 
 
 
 
Pension benefits:
 
 
 
 
 
 
 
 
Service cost
 
$
35

 
$
180

 
$
106

 
$
540

Interest cost
 
1,659

 
1,973

 
4,977

 
5,917

Expected return on plan assets
 
(2,184
)
 
(2,466
)
 
(6,552
)
 
(7,398
)
Amortization of net loss
 
536

 
760

 
1,608

 
2,280

 
 
 
 
 
 
 
 
 
Net periodic benefit cost
 
$
46

 
$
447

 
$
139

 
$
1,339

 
 
 
 
 
 
 
 
 
Other benefits:
 
 

 
 

 
 

 
 

Service cost
 
$
54

 
$
61

 
$
163

 
$
183

Interest cost
 
147

 
153

 
442

 
458

Amortization of prior service credit
 
(225
)
 
(224
)
 
(676
)
 
(672
)
Amortization of net gain
 
(10
)
 
(9
)
 
(30
)
 
(27
)
 
 
 
 
 
 
 
 
 
Net periodic benefit income
 
$
(34
)
 
$
(19
)
 
$
(101
)
 
$
(58
)