Intangible Assets - Schedule of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Indefinite-lived Intangible Assets [Line Items]
Beginning Balance			$ 16,733
Additions			765
Net foreign currency translation			44
Amortization expense	(1,129)	(651)	(2,249)	(1,093)
Ending Balance	15,293		15,293
Capitalized Technology [Member]
Indefinite-lived Intangible Assets [Line Items]
Beginning Balance			13,776
Additions			673
Net foreign currency translation			15
Amortization expense			(2,008)
Ending Balance	12,456		12,456
Patents and Trademarks [Member]
Indefinite-lived Intangible Assets [Line Items]
Beginning Balance			1,961
Additions			92
Net foreign currency translation			(1)
Amortization expense			(98)
Ending Balance	1,954		1,954
Other [Member]
Indefinite-lived Intangible Assets [Line Items]
Beginning Balance			996
Additions			0
Net foreign currency translation			30
Amortization expense			(143)
Ending Balance	$ 883		$ 883