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Capital management (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Capital management        
Total liabilities $ 731,212 $ 424,619    
Less: cash and cash equivalents 336,024 184,938 $ 101,055 $ 106,437
Total liabilities less current assets 395,188 239,681    
Equity attributable to owners of Himax Technologies, Inc. $ 869,724 $ 480,176