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Accrued Expenses (Tables)
12 Months Ended
Dec. 28, 2018
Accounts Payable and Accrued Liabilities [Abstract]  
Schedule of Accrued Liabilities
Accrued expenses are comprised of the following (in thousands):
 
December 28, 2018
 
December 29,
2017
Salaries and benefits
$
21,830

 
$
25,103

Profit sharing and bonuses
22,912

 
13,625

Product warranties
2,600

 
2,820

Deferred revenue
2,482

 
1,610

Accrued interest
1,944

 
8,523

Other
8,722

 
8,695

Total
$
60,490

 
$
60,376