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Schedule of Prepayments and Other Assets (Detail) - USD ($) $ in Thousands | Sep. 29, 2019 | Dec. 31, 2018
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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

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