Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Intangible assets subject to amortization [Line Items]
Useful life	8 years 0 months 0 days
Gross carrying amount	$ 86,925	$ 69,707
Accumulated amortization	(32,245)	(24,161)
Currency exchange	(7,000)	(7,051)
Net	47,680	38,495
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross carrying amount	6,403	6,403
Currency exchange	(512)	(561)
Net	5,891	5,842
Total Intangible Assets - Gross Carrying Amount	93,328	76,110
Total Intangible Assets - Accumulated Amortization	(32,245)	(24,161)
Total Intangible Assets - Currency Exchange and Other	(7,512)	(7,612)
Total Intangible Assets - Net	53,571	44,337
Amortization of Intangible Assets	8,078	5,130	4,511
Trademarks [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross carrying amount	6,403	6,403
Currency exchange	(512)	(561)
Net	5,891	5,842
Patents [Member]
Intangible assets subject to amortization [Line Items]
Gross carrying amount	11,812	11,795
Accumulated amortization	(6,274)	(5,393)
Currency exchange	(228)	(273)
Net	5,310	6,129
Software License [Member]
Intangible assets subject to amortization [Line Items]
Gross carrying amount	1,212	1,212
Accumulated amortization	(1,149)	(1,149)
Currency exchange	(63)	(63)
Net	0	0
Developed Technology [Member]
Intangible assets subject to amortization [Line Items]
Gross carrying amount	53,508	42,408
Accumulated amortization	(20,654)	(15,316)
Currency exchange	(5,516)	(5,481)
Net	27,338	21,611
Customer Relationships [Member]
Intangible assets subject to amortization [Line Items]
Gross carrying amount	20,393	14,292
Accumulated amortization	(4,168)	(2,303)
Currency exchange	(1,193)	(1,234)
Net	$ 15,032	$ 10,755