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Total Borrowings, Including Short-Term and Long-Term Borrowings (Detail) - USD ($)
$ in Thousands
3 Months Ended
Sep. 28, 2018
Jun. 29, 2018
Sep. 29, 2017
Jun. 30, 2017
Debt Instrument [Line Items]        
Current portion of long-term borrowings $ 3,250 $ 3,250    
Long-term borrowings 63,375 64,188 $ 33,000 $ 36,400
Less: Current portion (3,250) (3,250)    
Non-current portion of long-term borrowings $ 60,125 60,938    
Loan Payable Due June 2023        
Debt Instrument [Line Items]        
Rate [1] LIBOR +1.50% per annum      
Conditions Repayable in quarterly installments      
Term 2023-06      
Long-term borrowings $ 63,375 $ 64,188    
Loan Payable Due June 2023 | LIBOR        
Debt Instrument [Line Items]        
Margin above rate 1.50%      
[1] LIBOR is London Interbank Offered Rate.