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Other Long-term Liabilities - Summary of Other Long-term Liabilities (Detail)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
USD ($)
Disclosure Of Other Long-term Liabilities [Line Items]  
Beginning balance $ 114,268
Increases 41,983
Used (9,149)
Reclassification (7,235)
Effect of movements in exchange rates (187)
Ending balance 139,680
Current and non - current  
Current 9,059
Non-current 130,621
Ending balance 139,680
Provision for litigations [member]  
Disclosure Of Other Long-term Liabilities [Line Items]  
Beginning balance 14,318
Increases 1,021
Effect of movements in exchange rates (187)
Ending balance 15,152
Current and non - current  
Non-current 15,152
Ending balance 15,152
Provision for return condition [member]  
Disclosure Of Other Long-term Liabilities [Line Items]  
Beginning balance 58,299
Increases 40,499
Used (5,824)
Ending balance 92,974
Current and non - current  
Current 4,897
Non-current 88,077
Ending balance 92,974
Other long term liabilities [member]  
Disclosure Of Other Long-term Liabilities [Line Items]  
Beginning balance 41,651
Increases 463
Used (3,325)
Reclassification (7,235)
Ending balance 31,554
Current and non - current  
Current 4,162
Non-current 27,392
Ending balance $ 31,554