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Segment, Product and Geographic Information (Details 1) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Segment revenues $ 737,255 $ 633,021 $ 642,692
Display drivers for large-size applications [Member]
     
Segment revenues 305,247 270,372 366,492
Display drivers for mobile handsets applications [Member]
     
Segment revenues 177,175 169,248 119,623
Display drivers for consumer electronics applications [Member]
     
Segment revenues 151,689 112,836 103,942
Others [Member]
     
Segment revenues $ 103,144 $ 80,565 $ 52,635