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OPERATING AND GEOGRAPHICAL SEGMENTS (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2012
segment
Mar. 31, 2011
OPERATING AND GEOGRAPHICAL SEGMENTS    
Number of reportable segments 4  
Information about Reportable Segments    
Net revenue from external customers $ 357,837 $ 461,427
Segment income (loss) from operations 16,223 102,216
Unallocated amounts:    
Acquisition-related charges (1,956) (1,031)
Restructuring charges   (21,210)
Credit from reserved grant income 10,689  
Gain on sale of assets   1,882
Income from operations 24,956 81,857
Micro-Controllers
   
Information about Reportable Segments    
Net revenue from external customers 217,802 293,826
Segment income (loss) from operations 6,683 73,807
Nonvolatile Memories
   
Information about Reportable Segments    
Net revenue from external customers 47,733 63,372
Segment income (loss) from operations 5,346 13,617
RF and Automotive
   
Information about Reportable Segments    
Net revenue from external customers 43,510 50,853
Segment income (loss) from operations (1,937) 5,410
ASIC
   
Information about Reportable Segments    
Net revenue from external customers 48,792 53,376
Segment income (loss) from operations $ 6,131 $ 9,382