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Accrued Severance Benefits - Changes in Accrued Severance Benefits (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Postemployment Benefits [Abstract]      
Beginning balance $ 45,594 $ 45,932  
Provisions 1,514 1,405  
Severance payments (325) (884)  
Translation adjustments 103 (1,969)  
Ending balance 46,886 44,484  
Less: Cumulative contributions to severance insurance deposit accounts (28,821) (28,954)  
The National Pension Fund (24) (27)  
Accrued severance benefits, net $ 18,041 $ 15,503 $ 17,094