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Employee Retirement plans (Details 1) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Benefit obligations at beginning of year $ 2,106 $ 1,880
Service cost 162 166
Interest cost 91 93
Plan amendments 0 0
Benefits paids (267) (10)
Actuarial loss (gain) 723 58
Exchange rate changes 4 (81)
Benefit obligations at end of year $ 2,819 $ 2,106