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Segment, Product and Geographic Information - Segment revenues from customers in different geographic region (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of operating segments [line items]      
Revenue $ 1,547,097 $ 887,282 $ 671,835
China [Member]      
Disclosure of operating segments [line items]      
Revenue 1,261,098 707,002 472,372
Taiwan [Member]      
Disclosure of operating segments [line items]      
Revenue 219,106 123,180 129,257
Other Asia Pacific (Philippines, Korea and Japan)      
Disclosure of operating segments [line items]      
Revenue 66,184 56,195 68,779
Europe and America [Member]      
Disclosure of operating segments [line items]      
Revenue 709 905 1,427
Driver IC [Member]      
Disclosure of operating segments [line items]      
Revenue 1,361,442 756,522 544,727
Driver IC [Member] | China [Member]      
Disclosure of operating segments [line items]      
Revenue 1,149,442 643,527 421,729
Driver IC [Member] | Taiwan [Member]      
Disclosure of operating segments [line items]      
Revenue 167,728 88,001 90,971
Driver IC [Member] | Other Asia Pacific (Philippines, Korea and Japan)      
Disclosure of operating segments [line items]      
Revenue 44,272 24,964 31,861
Driver IC [Member] | Europe and America [Member]      
Disclosure of operating segments [line items]      
Revenue   30 166
Non-driver products [Member]      
Disclosure of operating segments [line items]      
Revenue 185,655 130,760 127,108
Non-driver products [Member] | China [Member]      
Disclosure of operating segments [line items]      
Revenue 111,656 63,475 50,643
Non-driver products [Member] | Taiwan [Member]      
Disclosure of operating segments [line items]      
Revenue 51,378 35,179 38,286
Non-driver products [Member] | Other Asia Pacific (Philippines, Korea and Japan)      
Disclosure of operating segments [line items]      
Revenue 21,912 31,231 36,918
Non-driver products [Member] | Europe and America [Member]      
Disclosure of operating segments [line items]      
Revenue $ 709 $ 875 $ 1,261