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Non-operating income Non-operating income
3 Months Ended
Mar. 28, 2020
Nonoperating Income (Expense) [Abstract]  
Non-operating income
19. Non-operating income
Non-operating income consists of the following (in thousands):
 
Three Months Ended
 
March 28,
2020
 
March 30,
2019
Interest income
$
2,844

 
$
3,433

Realized and unrealized foreign currency gains
588

 
534

Interest expense
(84
)
 
(80
)
Other
(2
)
 
(1
)
Total
$
3,346

 
$
3,886