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Schedule of Prepayments and Other Assets (Detail) - USD ($)
$ in Thousands
Sep. 29, 2019
Dec. 31, 2018
Prepaid And Other Current Assets [Line Items]    
Contract manufacturer and supplier prepayments $ 136,470 $ 131,642
Prepaid taxes 9,754 9,646
Prepaid maintenance and other services 8,310 8,487
Other prepayments 17,180 12,744
Total prepayments $ 171,714 $ 162,519