The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of increase (decrease) to assets, excluding financial assets and goodwill, lacking physical substance and exist in perpetuity for foreign currency translation adjustments.

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Intangible Assets - Schedule of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Indefinite-lived Intangible Assets [Line Items]
Net balance at December 31, 2012			$ 6,507
Net foreign currency translation			(25)
Amortization expense	651	472	1,093	951
Net balance at June 30, 2013	18,729		18,729
June 30, 2013 balance at cost	32,500		32,500
Accumulated amortization	(13,771)		(13,771)
Net balance at June 30, 2013	18,729		18,729
Cronto [Member]
Indefinite-lived Intangible Assets [Line Items]
Additions			13,244
Other [Member]
Indefinite-lived Intangible Assets [Line Items]
Additions			95
Capitalized Technology [Member]
Indefinite-lived Intangible Assets [Line Items]
Net balance at December 31, 2012			4,847
Net foreign currency translation			0
Amortization expense			(1,018)
Net balance at June 30, 2013	15,753		15,753
June 30, 2013 balance at cost	29,234		29,234
Accumulated amortization	(13,481)		(13,481)
Net balance at June 30, 2013	15,753		15,753
Capitalized Technology [Member] \| Cronto [Member]
Indefinite-lived Intangible Assets [Line Items]
Additions			11,924
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			(4)
Amortization expense			(45)
Net balance at June 30, 2013	1,910		1,910
June 30, 2013 balance at cost	2,136		2,136
Accumulated amortization	(226)		(226)
Net balance at June 30, 2013	1,910		1,910
Patents and Trademarks [Member] \| Cronto [Member]
Indefinite-lived Intangible Assets [Line Items]
Additions			222
Patents and Trademarks [Member] \| Other [Member]
Indefinite-lived Intangible Assets [Line Items]
Additions			95
Other [Member]
Indefinite-lived Intangible Assets [Line Items]
Net balance at December 31, 2012			18
Net foreign currency translation			(21)
Amortization expense			(29)
Net balance at June 30, 2013	1,066		1,066
June 30, 2013 balance at cost	1,130		1,130
Accumulated amortization	(64)		(64)
Net balance at June 30, 2013	1,066		1,066
Other [Member] \| Cronto [Member]
Indefinite-lived Intangible Assets [Line Items]
Additions			1,098
Other [Member] \| Other [Member]
Indefinite-lived Intangible Assets [Line Items]
Additions			$ 0