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Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]        
Beginning Balance $ 12,819 $ 16,733    
Net foreign currency translation (38) (80)    
Amortization expense (4,942) (4,532) $ (3,325)  
Ending Balance 37,970 12,819 16,733  
December 31, 2015 balance at cost       $ 61,680
Accumulated amortization       (23,710)
Ending Balance 12,819 16,733 16,733 37,970
Other Acquisitions [Member]        
Finite-Lived Intangible Assets [Line Items]        
Additions 131 698    
Silanis Technology Inc [Member]        
Finite-Lived Intangible Assets [Line Items]        
Additions 30,000      
Amortization expense (6,060) (6,060)    
Capitalized Technology [Member]        
Finite-Lived Intangible Assets [Line Items]        
Beginning Balance 10,216 13,776    
Net foreign currency translation (15) (38)    
Amortization expense (4,569) (4,053)    
Ending Balance 34,632 10,216 13,776  
December 31, 2015 balance at cost       57,035
Accumulated amortization       (22,403)
Ending Balance 10,216 13,776 13,776 34,632
Capitalized Technology [Member] | Other Acquisitions [Member]        
Finite-Lived Intangible Assets [Line Items]        
Additions 0 531    
Capitalized Technology [Member] | Silanis Technology Inc [Member]        
Finite-Lived Intangible Assets [Line Items]        
Additions 29,000      
Patents and Trademarks [Member]        
Finite-Lived Intangible Assets [Line Items]        
Beginning Balance 1,929 1,961    
Net foreign currency translation 0 (1)    
Amortization expense (146) (198)    
Ending Balance 2,214 1,929 1,961  
December 31, 2015 balance at cost       2,863
Accumulated amortization       (649)
Ending Balance 1,929 1,961 1,961 2,214
Patents and Trademarks [Member] | Other Acquisitions [Member]        
Finite-Lived Intangible Assets [Line Items]        
Additions 131 167    
Patents and Trademarks [Member] | Silanis Technology Inc [Member]        
Finite-Lived Intangible Assets [Line Items]        
Additions 300      
Other [Member]        
Finite-Lived Intangible Assets [Line Items]        
Beginning Balance 674 996    
Net foreign currency translation (23) (41)    
Amortization expense (227) (281)    
Ending Balance 1,124 674 996  
December 31, 2015 balance at cost       1,782
Accumulated amortization       (658)
Ending Balance 674 996 $ 996 $ 1,124
Other [Member] | Other Acquisitions [Member]        
Finite-Lived Intangible Assets [Line Items]        
Additions 0 $ 0    
Other [Member] | Silanis Technology Inc [Member]        
Finite-Lived Intangible Assets [Line Items]        
Additions $ 700