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Related Parties - Schedule of Account Receivable and Payable of Related Party Transactions (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Related Party Transaction [Line Items]    
Accounts receivable $ 4,502 $ 5,067
Accounts payable 15,081 12,945
Lite On Semiconductor
   
Related Party Transaction [Line Items]    
Accounts receivable 291 140
Accounts payable 6,593 5,670
Keylink
   
Related Party Transaction [Line Items]    
Accounts receivable 4,211 4,927
Accounts payable 7,222 6,505
Nuvoton
   
Related Party Transaction [Line Items]    
Accounts payable $ 1,266 $ 770