Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			12 Months Ended
	Mar. 31, 2013		Mar. 31, 2012	Dec. 31, 2012
Goodwill [Line Items]
Definite-lived intangible assets recorded as a part of purchase price allocation	$ 12,000
Goodwill [Roll Forward]
Goodwill, beginning balance	24,500
Translation differences	(890)
Goodwill, ending balance	23,610	[1]		24,500
Accumulated impairment loss	0
Schedule of definite-lived intangible assets [Abstract]
Gross Amount beginning of period	12,116		12,000	12,000
Translation differences	(210)			116
Gross Amount end of period	11,906			12,116
Accumulated Amortization	(1,537)			(1,262)
Net Book Value	10,369			10,854
Amortization expense	300		300
Estimated amortization expense for amortizable intangible assets [Abstract]
Last nine months of 2013	900
2014	1,200
2015	1,200
2016	1,200
2017	1,200
Thereafter	4,669
Net Book Value	10,369			10,854
Trademarks [Member]
Schedule of definite-lived intangible assets [Abstract]
Gross Amount beginning of period	5,744		5,700	5,700
Translation differences	(80)			44
Gross Amount end of period	5,664			5,744
Accumulated Amortization	(731)			(598)
Net Book Value	4,933			5,146
Estimated amortization expense for amortizable intangible assets [Abstract]
Net Book Value	4,933			5,146
Customer Relationships [Member]
Schedule of definite-lived intangible assets [Abstract]
Gross Amount beginning of period	6,372		6,300	6,300
Translation differences	(130)			72
Gross Amount end of period	6,242			6,372
Accumulated Amortization	(806)			(664)
Net Book Value	5,436			5,708
Estimated amortization expense for amortizable intangible assets [Abstract]
Net Book Value	5,436			5,708
Current Reportable Segments [Member]
Goodwill [Line Items]
Goodwill recorded as a part of purchase price allocation	$ 24,005

[1] (unaudited)