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Net Periodic Pension (Benefit) Cost (Tables)
 6 Months Ended
Jun. 27, 2020
Retirement Benefits [Abstract]  
Schedule of net periodic pension cost for pension plans
The following table shows the components of our net periodic pension (benefit) cost:
 
Three Months Ended
 
Six Months Ended
 
June 27, 2020
 
June 29, 2019
 
June 27, 2020
 
June 29, 2019
 
(In thousands)
 
(In thousands)
Service cost
$
—

 
$
48

 
$
—

 
$
161

Interest cost on projected benefit obligation
723

 
973

 
1,446

 
2,018

Expected return on plan assets
(1,210
)
 
(1,295
)
 
(2,420
)
 
(2,489
)
Amortization of unrecognized loss
263

 
279

 
526

 
580

Net periodic pension (benefit) cost
$
(224
)
 
$
5

 
$
(448
)
 
$
270