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Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2016
Finite-Lived Intangible Assets [Line Items]      
Beginning Balance $ 37,970    
Net foreign currency translation (28)    
Amortization expense (2,224) $ (1,136)  
Ending Balance 35,728    
March 31, 2016 balance at cost     $ 61,963
Accumulated amortization     (26,235)
Ending Balance 35,728   35,728
Other Acquisitions [Member]      
Finite-Lived Intangible Assets [Line Items]      
Additions 10    
Capitalized Technology [Member]      
Finite-Lived Intangible Assets [Line Items]      
Beginning Balance 34,632    
Net foreign currency translation (14)    
Amortization expense (2,092)    
Ending Balance 32,526    
March 31, 2016 balance at cost     57,336
Accumulated amortization     (24,810)
Ending Balance 32,526   32,526
Capitalized Technology [Member] | Other Acquisitions [Member]      
Finite-Lived Intangible Assets [Line Items]      
Additions 0    
Patents and Trademarks [Member]      
Finite-Lived Intangible Assets [Line Items]      
Beginning Balance 2,214    
Net foreign currency translation (1)    
Amortization expense (53)    
Ending Balance 2,170    
March 31, 2016 balance at cost     2,874
Accumulated amortization     (704)
Ending Balance 2,170   2,170
Patents and Trademarks [Member] | Other Acquisitions [Member]      
Finite-Lived Intangible Assets [Line Items]      
Additions 10    
Other [Member]      
Finite-Lived Intangible Assets [Line Items]      
Beginning Balance 1,124    
Net foreign currency translation (13)    
Amortization expense (79)    
Ending Balance 1,032    
March 31, 2016 balance at cost     1,753
Accumulated amortization     (721)
Ending Balance 1,032   $ 1,032
Other [Member] | Other Acquisitions [Member]      
Finite-Lived Intangible Assets [Line Items]      
Additions $ 0