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Schedule of Prepayments (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Prepaid And Other Current Assets [Line Items]    
Contract manufacturer prepayments $ 66,283 $ 65,972
Prepaid maintenance and other services 8,481 7,343
Prepaid taxes 3,781 11,462
Other prepayments 12,974 11,042
Total prepayments $ 91,519 $ 95,819