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Benefit Plans (Tables)
 6 Months Ended
Jul. 01, 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 Six Months Ended
(In thousands) 
 
July 1, 2017
 
July 2, 2016
 
July 1, 2017
 
July 2, 2016
 
 
 
 
 
 
 
 
 
Pension benefits:
 
 
 
 
 
 
 
 
Service cost
 
$
36

 
$
165

 
$
71

 
$
360

Interest cost
 
1,653

 
1,969

 
3,318

 
3,944

Expected return on plan assets
 
(2,186
)
 
(2,466
)
 
(4,368
)
 
(4,932
)
Amortization of net loss
 
516

 
746

 
1,072

 
1,520

 
 
 
 
 
 
 
 
 
Net periodic benefit cost
 
$
19

 
$
414

 
$
93

 
$
892

 
 
 
 
 
 
 
 
 
Other benefits:
 
 

 
 

 
 

 
 

Service cost
 
$
53

 
$
60

 
$
109

 
$
122

Interest cost
 
146

 
149

 
295

 
305

Amortization of prior service credit
 
(226
)
 
(224
)
 
(451
)
 
(448
)
Amortization of net gain
 
(15
)
 
(20
)
 
(20
)
 
(18
)
 
 
 
 
 
 
 
 
 
Net periodic benefit income
 
$
(42
)
 
$
(35
)
 
$
(67
)
 
$
(39
)