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Property, Plant and Equipment
12 Months Ended
Dec. 31, 2012
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Disclosure [Text Block]
Note 9.Property, Plant and Equipment

 

  December 31, 
  2011  2012 
  (in thousands) 
       
Land $10,154   14,328 
Building and improvements  17,737   17,740 
Machinery  27,213   31,494 
Research and development equipment  17,393   18,020 
Software  10,047   10,540 
Office furniture and equipment  7,281   7,681 
Others  9,881   17,282 
   99,706   117,085 
Accumulated depreciation and amortization  (53,594)  (66,420)
Prepayment for purchases of land and equipment  11,038   1,944 
  $57,150   52,609 

 

Depreciation and amortization of these assets for the years ended December 31, 2010, 2011 and 2012, were $11,428 thousand, $10,615 thousand and $10,791 thousand, respectively.