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Intangible Assets - Schedule of Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Indefinite-lived Intangible Assets [Line Items]    
Net balance at December 31, 2011 $ 6,507 $ 8,091
Net foreign currency translation 67 (17)
Amortization expense (3,325) (1,910)
Net balance at December 31, 2012 16,733 6,507
December 31, 2013 balance at cost 32,913  
Accumulated amortization (16,180)  
Net balance at December 31, 2013 16,733 6,507
Other Acquisitions [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Additions 227 343
Cronto [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Additions 13,257  
Capitalized Technology [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Net balance at December 31, 2011 4,847 6,693
Net foreign currency translation 6 (17)
Amortization expense (3,014) (1,829)
Net balance at December 31, 2012 13,776 4,847
December 31, 2013 balance at cost 29,432  
Accumulated amortization (15,656)  
Net balance at December 31, 2013 13,776 4,847
Capitalized Technology [Member] | Other Acquisitions [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Additions 0 0
Capitalized Technology [Member] | Cronto [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Additions 11,937  
Patents and Trademarks [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Net balance at December 31, 2011 1,642 1,361
Net foreign currency translation 0  
Amortization expense (143) (62)
Net balance at December 31, 2012 1,961 1,642
December 31, 2013 balance at cost 2,271  
Accumulated amortization (310)  
Net balance at December 31, 2013 1,961 1,642
Patents and Trademarks [Member] | Other Acquisitions [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Additions 227 343
Patents and Trademarks [Member] | Cronto [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Additions 235  
Other [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Net balance at December 31, 2011 18 37
Net foreign currency translation 61  
Amortization expense (168) (19)
Net balance at December 31, 2012 996 18
December 31, 2013 balance at cost 1,210  
Accumulated amortization (214)  
Net balance at December 31, 2013 996 18
Other [Member] | Other Acquisitions [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Additions 0  
Other [Member] | Cronto [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Additions $ 1,085