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Schedule of Prepayments (Detail) - USD ($) $ in Thousands	Oct. 01, 2017	Dec. 31, 2016
Prepaid And Other Current Assets [Line Items]
Contract manufacturer prepayments	$ 78,293	$ 84,473
Prepaid taxes	9,658	4,664
Prepaid maintenance and other services	6,685	7,676
Other prepayments	10,673	11,641
Total	$ 105,309	$ 108,454

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