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Other Income (Expense) (Tables)
9 Months Ended
Sep. 30, 2012
Other Income and Expenses [Abstract]  
Schedule of Other Nonoperating Income (Expense) [Table Text Block]
    Three Months Ended September 30,     Nine Months Ended September 30,  
    2012     2011     2012     2011  
Other income   $ 161     $ 3     $ 179     $ 94  
Foreign currency loss     (575 )     (3,111 )     (1,420 )     (2,440 )
Loss on sale of assets     (19 )     (4 )     (1 )     (4 )
    $ (433 )   $ (3,112 )   $ (1,242 )   $ (2,350 )