Income Taxes (Details 4) (Deferred tax valuation allowance [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Deferred tax valuation allowance [Member]
Summary of changes in deferred tax valuation allowance
Deferred tax valuation allowance at January 1	$ 3,077	$ 2,676	$ 11,672
Additions	11	508	440
Deductions	(1,066)	(85)	(9,405)
Translation adjustments	64	(22)	(31)
Deferred tax valuation allowance at December 31	$ 2,086	$ 3,077	$ 2,676