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Schedule of Accumulated Other Comprehensive Loss (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance $ (23,747) $ (11,474)  
Ending balance (46,904) (23,747) $ (11,474)
Foreign currency translation adjustment      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance (23,623) (11,181) (1,785)
Current period other comprehensive (loss) income (23,581) (12,442) (9,396)
Ending balance (47,204) (23,623) (11,181)
Cash flow hedging instruments      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance 168    
Current period other comprehensive (loss) income 1,628 168  
Less reclassification adjustment (1,196)    
Ending balance 600 168  
Available-for-sale securities      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance (292) (293) (317)
Current period other comprehensive (loss) income (8) 1 24
Ending balance $ (300) $ (292) $ (293)