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Schedule of Prepayments (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Prepaid And Other Current Assets [Line Items] |  |
Contract manufacturer prepayments | $ 77,017 | $ 66,283
Prepaid maintenance and other services | 7,676 | 8,481
Prepaid taxes | 4,664 | 3,781
Other prepayments | 19,097 | 12,974
Total prepayments | $ 108,454 | $ 91,519

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