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Income Taxes- Expiration period for unrecognized deferred tax assets (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
USD ($)
Financial Risk Management  
Unrecognized deferred tax assets $ 41,411
Taiwan operations | Expiration Year 2025 To 2029  
Financial Risk Management  
Deductible amount 100,779
Unrecognized deferred tax assets $ 20,156
Expiration year 2025~2029
Taiwan operations | Expiration Year 2030 To 2034  
Financial Risk Management  
Deductible amount $ 84,871
Unrecognized deferred tax assets $ 16,974
Expiration year 2030~2034
Hong Kong operations  
Financial Risk Management  
Deductible amount $ 1,825
Unrecognized deferred tax assets $ 150
Expiration year Indefinitely
US operations | Expiration 2025 to Indefinitely  
Financial Risk Management  
Deductible amount $ 15,075
Unrecognized deferred tax assets $ 4,131
Expiration year 2025~Indefinitely