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Pensions and Other Post-Employment Liabilities (Details 1) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Changes to Service and Early Retirement Provisions        
Beginning balance $ (829) $ (835) $ (783) $ (749)
Service cost (5) (6) (30) (26)
Benefits paid 39 33 54 36
Interest cost (7) (17) (17) (38)
Currency impacts 47 (15) 21 (63)
Ending balance $ (755) $ (840) $ (755) $ (840)