Goodwill and Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			3 Months Ended	12 Months Ended			3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Mar. 31, 2013 Technology-based intangibles [Member]	Dec. 31, 2012 Technology-based intangibles [Member]	Mar. 31, 2013 Customer related intangibles [Member]	Dec. 31, 2012 Customer related intangibles [Member]	Mar. 31, 2013 Customer related intangibles [Member] Minimum [Member]	Dec. 31, 2012 Customer related intangibles [Member] Minimum [Member]	Mar. 31, 2013 Customer related intangibles [Member] Maximum [Member]	Dec. 31, 2012 Customer related intangibles [Member] Maximum [Member]
Goodwill [Roll Forward]
Balance as of December 31, 2012	$ 37,312
Translation effect	(886)
Balance as of March 31, 2013	36,426
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization Period				20 years	20 years			10 years	10 years	15 years	15 years
Gross Carrying Amount	4,649		4,789	3,894	4,011	755	778
Accumulated Amortization	(739)		(698)	(584)	(552)	(155)	(146)
Net Carrying Amount	3,910		4,091	3,310	3,459	600	632
Amortization expense	64	63
Finite-Lived Intangible Assets, Net, Amortization Expense, Rolling Maturity [Abstract]
Amortization expense for current intangible assets, for year one	250
Amortization expense for current intangible assets, for year two	250
Amortization expense for current intangible assets, for year three	250
Amortization expense for current intangible assets, for year four	250
Amortization expense for current intangible assets, for year five	$ 250