Summary of Gross Carrying Amount and Accumulated Amortization for Intangible Assets Resulting from Acquisitions (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Cost:
Beginning Balance			$ 16,179	$ 44,370	$ 44,370
Impairment of intangible assets			(277)		(32,101)
Currency translation adjustment			8		(322)
Ending Balance	15,910		15,910		16,179
Accumulated Amortization:
Beginning Balance			(4,297)	(8,369)	(8,369)
Amortization expense	(293)	(424)	(1,163)	(2,844)	(3,277)
Impairment of intangible assets			130		7,316
Currency translation adjustment			(8)		33
Ending Balance	(5,338)		(5,338)		(4,297)
Intangible assets, net	10,572		10,572		11,882	[1]
Payment Solution AG
Cost:
Acquired as a part of payment solution acquisition					4,232
Order Backlog
Cost:
Beginning Balance			277	948	948
Impairment of intangible assets			(277)		(1,018)
Currency translation adjustment					3
Ending Balance					277
Accumulated Amortization:
Beginning Balance			(71)	(948)	(948)
Amortization expense			(59)		(72)
Impairment of intangible assets			130		959
Currency translation adjustment					(10)
Ending Balance					(71)
Intangible assets, net					206
Order Backlog | Minimum
Cost:
Amortization period			3 months
Order Backlog | Maximum
Cost:
Amortization period			1 year
Order Backlog | Payment Solution AG
Cost:
Acquired as a part of payment solution acquisition					344
Trade Secrets
Cost:
Beginning Balance				300	300
Impairment of intangible assets					(300)
Accumulated Amortization:
Beginning Balance				(120)	(120)
Amortization expense					(90)
Impairment of intangible assets					210
Trade Secrets | Minimum
Cost:
Amortization period			1 year
Trade Secrets | Maximum
Cost:
Amortization period			2 years
Patents
Cost:
Beginning Balance				790	790
Impairment of intangible assets					(790)
Amortization period			12 years
Accumulated Amortization:
Beginning Balance				(44)	(44)
Amortization expense					(33)
Impairment of intangible assets					77
Existing Technology
Cost:
Beginning Balance			4,600	8,170	8,170
Impairment of intangible assets					(5,489)
Currency translation adjustment					(104)
Ending Balance	4,600		4,600		4,600
Accumulated Amortization:
Beginning Balance			(1,125)	(1,295)	(1,295)
Amortization expense			(230)		(695)
Impairment of intangible assets					865
Ending Balance	(1,355)		(1,355)		(1,125)
Intangible assets, net	3,245		3,245		3,475
Existing Technology | Minimum
Cost:
Amortization period			6 years
Existing Technology | Maximum
Cost:
Amortization period			12 years
Existing Technology | Payment Solution AG
Cost:
Acquired as a part of payment solution acquisition					2,023
Customer Relationships
Cost:
Beginning Balance			10,732	24,795	24,795
Impairment of intangible assets					(15,210)
Currency translation adjustment			8		(176)
Ending Balance	10,740		10,740		10,732
Accumulated Amortization:
Beginning Balance			(2,816)	(5,924)	(5,924)
Amortization expense			(589)		(2,055)
Impairment of intangible assets					5,118
Currency translation adjustment			(8)		45
Ending Balance	(3,413)		(3,413)		(2,816)
Intangible assets, net	7,327		7,327		7,916
Customer Relationships | Minimum
Cost:
Amortization period			4 years
Customer Relationships | Maximum
Cost:
Amortization period			12 years
Customer Relationships | Payment Solution AG
Cost:
Acquired as a part of payment solution acquisition					1,323
Trade Names
Cost:
Beginning Balance			570	9,367	9,367
Impairment of intangible assets					(9,294)
Currency translation adjustment					(45)
Ending Balance	570		570		570
Accumulated Amortization:
Beginning Balance			(285)	(38)	(38)
Amortization expense			(285)		(332)
Impairment of intangible assets					87
Currency translation adjustment					(2)
Ending Balance	(570)		(570)		(285)
Intangible assets, net					285
Trade Names | Minimum
Cost:
Amortization period			1 year
Trade Names | Maximum
Cost:
Amortization period			10 years
Trade Names | Payment Solution AG
Cost:
Acquired as a part of payment solution acquisition					$ 542

[1] The condensed consolidated balance sheet has been derived from the audited consolidated financial statements at December 31, 2012 but does not include all the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements.