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Employee Benefit Plans (Tables)
3 Months Ended
Mar. 28, 2020
Retirement Benefits [Abstract]  
Net pension cost
Net pension cost for the three months ended March 28, 2020 and March 30, 2019 includes the following components (in thousands):
 
Pension Benefits
 
Three Months Ended
 
March 28,
2020
March 30,
2019
Service cost
$
755

$
678

Interest cost
1,428

1,710

Expected return on plan assets
(2,039
)
(1,819
)
Amortization of prior service cost
8

9

Amortization of net loss
854

1,146

Net pension cost
$
1,006

$
1,724