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Schedule of Prepayments and Other Assets (Detail) - USD ($) $ in Thousands | Jul. 01, 2018 | Dec. 31, 2017
--- | --- | ---
Prepaid And Other Current Assets [Line Items] |  |
Contract manufacturer and supplier prepayments | $ 78,148 | $ 82,503
Prepaid maintenance and other services | 8,651 | 8,189
Prepaid taxes | 6,801 | 5,039
Other prepayments | 13,114 | 12,386
Total prepayments | $ 106,714 | $ 108,117

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