Intangible Assets (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Intangible assets subject to amortization [Line Items]
Gross carrying amount	$ 48,664,000	$ 48,664,000
Accumulated amortization	(19,193,000)	(14,681,000)
Currency exchange	(7,760,000)	(7,718,000)
Net	21,711,000	26,265,000
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross carrying amount	3,162,000	3,162,000
Currency exchange	(676,000)	(657,000)
Net	2,486,000	2,505,000
Total Intangible Assets - Gross Carrying Amount	51,826,000	51,826,000
Total Intangible Assets - Accumulated Amortization	(19,193,000)	(14,681,000)
Total Intangible Assets - Currency Exchange and Other	(8,436,000)	(8,375,000)
Total Intangible Assets - Net	24,197,000	28,770,000
Amortization expense, intangible assets	5,000,000	4,000,000	5,000,000
Trademarks [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross carrying amount	3,162,000	3,162,000
Currency exchange	(676,000)	(657,000)
Net	2,486,000	2,505,000
Patents [Member]
Intangible assets subject to amortization [Line Items]
Gross carrying amount	10,892,000	10,892,000
Accumulated amortization	(4,619,000)	(3,822,000)
Currency exchange	(339,000)	(303,000)
Net	5,934,000	6,767,000
Patents [Member] | Minimum [Member]
Intangible assets subject to amortization [Line Items]
Useful life	5 years	5 years
Patents [Member] | Maximum [Member]
Intangible assets subject to amortization [Line Items]
Useful life	15 years	15 years
Software License [Member]
Intangible assets subject to amortization [Line Items]
Useful life	3 years	3 years
Gross carrying amount	1,212,000	1,212,000
Accumulated amortization	(1,149,000)	(1,149,000)
Currency exchange	(63,000)	(63,000)
Net	0	0
Developed Technology [Member]
Intangible assets subject to amortization [Line Items]
Gross carrying amount	29,643,000	29,643,000
Accumulated amortization	(11,765,000)	(8,520,000)
Currency exchange	(5,958,000)	(5,943,000)
Net	11,920,000	15,180,000
Developed Technology [Member] | Minimum [Member]
Intangible assets subject to amortization [Line Items]
Useful life	2 years	2 years
Developed Technology [Member] | Maximum [Member]
Intangible assets subject to amortization [Line Items]
Useful life	10 years	10 years
Customer Relationships [Member]
Intangible assets subject to amortization [Line Items]
Useful life	12 years	12 years
Gross carrying amount	6,917,000	6,917,000
Accumulated amortization	(1,660,000)	(1,190,000)
Currency exchange	(1,400,000)	(1,409,000)
Net	$ 3,857,000	$ 4,318,000