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Segment, Product and Geographic Information - Segment revenues from major product lines (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
Display drivers for large-sized applications [Member]      
Disclosure of operating segments [line items]      
Revenue 397,905 240,789 237,276
Display drivers for small and medium-sized applications [Member]      
Disclosure of operating segments [line items]      
Revenue 963,537 515,733 307,451
Non-driver products [Member]      
Disclosure of operating segments [line items]      
Revenue 185,655 130,760 127,108
Driver IC [Member]      
Disclosure of operating segments [line items]      
Revenue 1,361,442 756,522 544,727
Driver IC [Member] | Display drivers for large-sized applications [Member]      
Disclosure of operating segments [line items]      
Revenue 397,905 240,789 237,276
Driver IC [Member] | Display drivers for small and medium-sized applications [Member]      
Disclosure of operating segments [line items]      
Revenue 963,537 515,733 307,451
Driver IC [Member] | Non-driver products [Member]      
Disclosure of operating segments [line items]      
Revenue 0 0 0
Non-driver products [Member]      
Disclosure of operating segments [line items]      
Revenue 185,655 130,760 127,108
Non-driver products [Member] | Display drivers for large-sized applications [Member]      
Disclosure of operating segments [line items]      
Revenue 0 0 0
Non-driver products [Member] | Display drivers for small and medium-sized applications [Member]      
Disclosure of operating segments [line items]      
Revenue 0 0 0
Non-driver products [Member] | Non-driver products [Member]      
Disclosure of operating segments [line items]      
Revenue $ 185,655 $ 130,760 $ 127,108