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Property, Plant and Equipment (Tables)
12 Months Ended
Dec. 31, 2012
Leases, Capital [Abstract]  
Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block]
  For the year ended December 31,   
  2013$291 
  2014 147 
  2015 99 
  2016 65 
  2017 58 
  2018 and beyond 0 
  Total net minimum lease payments 660 
  Less amount representing interest (48) 
  Present value of net minimum lease payments$612 
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment [Table Text Block]
    December 31, 
    2012  2011 
  Land$8,346 $8,198 
  Building and improvements 72,292  71,029 
  Machinery and equipment 134,754  130,939 
  Construction in progress 9,785  4,529 
    225,177  214,695 
  Less accumulated depreciation (140,065)  (131,779) 
   $85,112 $82,916