Intangible Assets - Schedule of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Indefinite-lived Intangible Assets [Line Items]
Net balance at December 31, 2012			$ 6,507
Net foreign currency translation			44
Amortization expense	(1,114)	(476)	(2,207)	(1,427)
Net balance at September 30, 2013	17,777		17,777
September 30, 2013 balance at cost	32,953		32,953
Accumulated amortization	(15,176)		(15,176)
Net balance at September 30, 2013	17,777		17,777
Cronto [Member]
Indefinite-lived Intangible Assets [Line Items]
Additions			13,257
Other [Member]
Indefinite-lived Intangible Assets [Line Items]
Additions			176
Capitalized Technology [Member]
Indefinite-lived Intangible Assets [Line Items]
Net balance at December 31, 2012			4,847
Net foreign currency translation			5
Amortization expense			(2,016)
Net balance at September 30, 2013	14,773		14,773
September 30, 2013 balance at cost	29,536		29,536
Accumulated amortization	(14,763)		(14,763)
Net balance at September 30, 2013	14,773		14,773
Capitalized Technology [Member] | Cronto [Member]
Indefinite-lived Intangible Assets [Line Items]
Additions			11,937
Capitalized Technology [Member] | Other [Member]
Indefinite-lived Intangible Assets [Line Items]
Additions			0
Patents and Trademarks [Member]
Indefinite-lived Intangible Assets [Line Items]
Net balance at December 31, 2012			1,642
Net foreign currency translation			0
Amortization expense			(94)
Net balance at September 30, 2013	1,959		1,959
September 30, 2013 balance at cost	2,234		2,234
Accumulated amortization	(275)		(275)
Net balance at September 30, 2013	1,959		1,959
Patents and Trademarks [Member] | Cronto [Member]
Indefinite-lived Intangible Assets [Line Items]
Additions			235
Patents and Trademarks [Member] | Other [Member]
Indefinite-lived Intangible Assets [Line Items]
Additions			176
Other [Member]
Indefinite-lived Intangible Assets [Line Items]
Net balance at December 31, 2012			18
Net foreign currency translation			39
Amortization expense			(97)
Net balance at September 30, 2013	1,045		1,045
September 30, 2013 balance at cost	1,183		1,183
Accumulated amortization	(138)		(138)
Net balance at September 30, 2013	1,045		1,045
Other [Member] | Cronto [Member]
Indefinite-lived Intangible Assets [Line Items]
Additions			1,085
Other [Member] | Other [Member]
Indefinite-lived Intangible Assets [Line Items]
Additions			$ 0