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Pension and Severance Plans (Schedule of Accrued Severance Obligation) (Details) - Korean Severance Plan - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Deferred Compensation Liability, Current and Noncurrent [Roll Forward]    
Balance at beginning of the year $ 47,906 $ 56,289
Provision of severance benefits 3,142 1,653
Severance payments (1,416) (8,770)
Foreign currency (gain) loss (6,194) (1,266)
Balance at the end of year 43,438 47,906
Payments remaining with the National Pension Fund (101) (119)
Total accrued severance plan obligations at December 31 43,337 47,787
Less current portion of accrued severance plan obligations (Note 10) 12,231 7,906
Non-current portion of accrued severance plan obligations 31,106 $ 39,881
Postemployment benefit liability, current, converted to defined contribution plan $ 5,000