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Schedule of Prepayments (Detail) - USD ($) $ in Thousands	Apr. 02, 2017	Dec. 31, 2016
Prepaid And Other Current Assets [Line Items]
Contract manufacturer and supplier prepayments	$ 83,398	$ 84,473
Prepaid maintenance and other services	7,210	7,676
Prepaid taxes	3,326	4,664
Other prepayments	13,053	11,641
Total prepayments	$ 106,987	$ 108,454

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