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Schedule of Accumulated Other Comprehensive Loss (Detail) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance $ (23,747)  
Ending balance (42,033) $ (18,881)
Foreign currency translation adjustment    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance (23,623) (11,181)
Current period other comprehensive (loss) income (18,853) (7,394)
Ending balance (42,476) (18,575)
Cash flow hedging instruments    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance 168  
Current period other comprehensive (loss) income 1,398  
Less reclassification adjustment (837)  
Ending balance 729  
Available-for-sale securities    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance (292) (293)
Current period other comprehensive (loss) income 6 (13)
Ending balance $ (286) $ (306)