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Income Taxes (Details 8) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Operating Loss Carryforwards [Line Items]  
Tax effect $ 28,098
Taiwan operations [Member]
  
Operating Loss Carryforwards [Line Items]  
Deductible amount 146,638
Tax effect 24,928
Taiwan operations [Member] | Minimum [Member]
  
Operating Loss Carryforwards [Line Items]  
Expiration year (in years) 2014
Taiwan operations [Member] | Maximum [Member]
  
Operating Loss Carryforwards [Line Items]  
Expiration year (in years) 2023
Hong Kong Operations [Member]
  
Operating Loss Carryforwards [Line Items]  
Deductible amount 1,808
Tax effect 298
Expiration year (in years) Indefinitely
US operations [Member]
  
Operating Loss Carryforwards [Line Items]  
Deductible amount 7,211
Tax effect $ 2,872
US operations [Member] | Minimum [Member]
  
Operating Loss Carryforwards [Line Items]  
Expiration year (in years) 2024
US operations [Member] | Maximum [Member]
  
Operating Loss Carryforwards [Line Items]  
Expiration year (in years) 2033