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Post-Retirement Health Care
 9 Months Ended
Sep. 28, 2019
Retirement Benefits [Abstract]  
Post-Retirement Health Care Post-Retirement Health Care

The following table sets forth the components of net periodic benefit costs included in the Condensed Consolidated Statements of Comprehensive Income (in thousands):
 
Three Months Ended
 
Nine Months Ended
 
September 28,
2019
 
September 29,
2018
 
September 28,
2019
 
September 29,
2018
Service cost
$
170

 
$
213

 
$
510

 
$
639

Interest cost
199

 
197

 
596

 
591

Amortization of net (gain) loss
—

 
32

 
—

 
95

Net periodic post-retirement benefit cost
$
369

 
$
442

 
$
1,106

 
$
1,325