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Inventories (Tables)
9 Months Ended
Sep. 30, 2012
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]

Inventory cost includes material, labor and overhead. Inventories consisted of the following:

 

    September 30,     December 31,  
    2012     2011  
             
Raw materials   $ 70,971     $ 72,308  
Work-in-progress     13,884       14,722  
Finished goods     23,714       33,615  
Total inventories, net   $ 108,569     $ 120,645